| 1 | /* |
| 2 | FLAC audio decoder. Choice of public domain or MIT-0. See license statements at the end of this file. |
| 3 | dr_flac - v0.12.28 - 2021-02-21 |
| 4 | |
| 5 | David Reid - mackron@gmail.com |
| 6 | |
| 7 | GitHub: https://github.com/mackron/dr_libs |
| 8 | */ |
| 9 | |
| 10 | /* |
| 11 | RELEASE NOTES - v0.12.0 |
| 12 | ======================= |
| 13 | Version 0.12.0 has breaking API changes including changes to the existing API and the removal of deprecated APIs. |
| 14 | |
| 15 | |
| 16 | Improved Client-Defined Memory Allocation |
| 17 | ----------------------------------------- |
| 18 | The main change with this release is the addition of a more flexible way of implementing custom memory allocation routines. The |
| 19 | existing system of DRFLAC_MALLOC, DRFLAC_REALLOC and DRFLAC_FREE are still in place and will be used by default when no custom |
| 20 | allocation callbacks are specified. |
| 21 | |
| 22 | To use the new system, you pass in a pointer to a drflac_allocation_callbacks object to drflac_open() and family, like this: |
| 23 | |
| 24 | void* my_malloc(size_t sz, void* pUserData) |
| 25 | { |
| 26 | return malloc(sz); |
| 27 | } |
| 28 | void* my_realloc(void* p, size_t sz, void* pUserData) |
| 29 | { |
| 30 | return realloc(p, sz); |
| 31 | } |
| 32 | void my_free(void* p, void* pUserData) |
| 33 | { |
| 34 | free(p); |
| 35 | } |
| 36 | |
| 37 | ... |
| 38 | |
| 39 | drflac_allocation_callbacks allocationCallbacks; |
| 40 | allocationCallbacks.pUserData = &myData; |
| 41 | allocationCallbacks.onMalloc = my_malloc; |
| 42 | allocationCallbacks.onRealloc = my_realloc; |
| 43 | allocationCallbacks.onFree = my_free; |
| 44 | drflac* pFlac = drflac_open_file("my_file.flac", &allocationCallbacks); |
| 45 | |
| 46 | The advantage of this new system is that it allows you to specify user data which will be passed in to the allocation routines. |
| 47 | |
| 48 | Passing in null for the allocation callbacks object will cause dr_flac to use defaults which is the same as DRFLAC_MALLOC, |
| 49 | DRFLAC_REALLOC and DRFLAC_FREE and the equivalent of how it worked in previous versions. |
| 50 | |
| 51 | Every API that opens a drflac object now takes this extra parameter. These include the following: |
| 52 | |
| 53 | drflac_open() |
| 54 | drflac_open_relaxed() |
| 55 | drflac_open_with_metadata() |
| 56 | drflac_open_with_metadata_relaxed() |
| 57 | drflac_open_file() |
| 58 | drflac_open_file_with_metadata() |
| 59 | drflac_open_memory() |
| 60 | drflac_open_memory_with_metadata() |
| 61 | drflac_open_and_read_pcm_frames_s32() |
| 62 | drflac_open_and_read_pcm_frames_s16() |
| 63 | drflac_open_and_read_pcm_frames_f32() |
| 64 | drflac_open_file_and_read_pcm_frames_s32() |
| 65 | drflac_open_file_and_read_pcm_frames_s16() |
| 66 | drflac_open_file_and_read_pcm_frames_f32() |
| 67 | drflac_open_memory_and_read_pcm_frames_s32() |
| 68 | drflac_open_memory_and_read_pcm_frames_s16() |
| 69 | drflac_open_memory_and_read_pcm_frames_f32() |
| 70 | |
| 71 | |
| 72 | |
| 73 | Optimizations |
| 74 | ------------- |
| 75 | Seeking performance has been greatly improved. A new binary search based seeking algorithm has been introduced which significantly |
| 76 | improves performance over the brute force method which was used when no seek table was present. Seek table based seeking also takes |
| 77 | advantage of the new binary search seeking system to further improve performance there as well. Note that this depends on CRC which |
| 78 | means it will be disabled when DR_FLAC_NO_CRC is used. |
| 79 | |
| 80 | The SSE4.1 pipeline has been cleaned up and optimized. You should see some improvements with decoding speed of 24-bit files in |
| 81 | particular. 16-bit streams should also see some improvement. |
| 82 | |
| 83 | drflac_read_pcm_frames_s16() has been optimized. Previously this sat on top of drflac_read_pcm_frames_s32() and performed it's s32 |
| 84 | to s16 conversion in a second pass. This is now all done in a single pass. This includes SSE2 and ARM NEON optimized paths. |
| 85 | |
| 86 | A minor optimization has been implemented for drflac_read_pcm_frames_s32(). This will now use an SSE2 optimized pipeline for stereo |
| 87 | channel reconstruction which is the last part of the decoding process. |
| 88 | |
| 89 | The ARM build has seen a few improvements. The CLZ (count leading zeroes) and REV (byte swap) instructions are now used when |
| 90 | compiling with GCC and Clang which is achieved using inline assembly. The CLZ instruction requires ARM architecture version 5 at |
| 91 | compile time and the REV instruction requires ARM architecture version 6. |
| 92 | |
| 93 | An ARM NEON optimized pipeline has been implemented. To enable this you'll need to add -mfpu=neon to the command line when compiling. |
| 94 | |
| 95 | |
| 96 | Removed APIs |
| 97 | ------------ |
| 98 | The following APIs were deprecated in version 0.11.0 and have been completely removed in version 0.12.0: |
| 99 | |
| 100 | drflac_read_s32() -> drflac_read_pcm_frames_s32() |
| 101 | drflac_read_s16() -> drflac_read_pcm_frames_s16() |
| 102 | drflac_read_f32() -> drflac_read_pcm_frames_f32() |
| 103 | drflac_seek_to_sample() -> drflac_seek_to_pcm_frame() |
| 104 | drflac_open_and_decode_s32() -> drflac_open_and_read_pcm_frames_s32() |
| 105 | drflac_open_and_decode_s16() -> drflac_open_and_read_pcm_frames_s16() |
| 106 | drflac_open_and_decode_f32() -> drflac_open_and_read_pcm_frames_f32() |
| 107 | drflac_open_and_decode_file_s32() -> drflac_open_file_and_read_pcm_frames_s32() |
| 108 | drflac_open_and_decode_file_s16() -> drflac_open_file_and_read_pcm_frames_s16() |
| 109 | drflac_open_and_decode_file_f32() -> drflac_open_file_and_read_pcm_frames_f32() |
| 110 | drflac_open_and_decode_memory_s32() -> drflac_open_memory_and_read_pcm_frames_s32() |
| 111 | drflac_open_and_decode_memory_s16() -> drflac_open_memory_and_read_pcm_frames_s16() |
| 112 | drflac_open_and_decode_memory_f32() -> drflac_open_memroy_and_read_pcm_frames_f32() |
| 113 | |
| 114 | Prior versions of dr_flac operated on a per-sample basis whereas now it operates on PCM frames. The removed APIs all relate |
| 115 | to the old per-sample APIs. You now need to use the "pcm_frame" versions. |
| 116 | */ |
| 117 | |
| 118 | |
| 119 | /* |
| 120 | Introduction |
| 121 | ============ |
| 122 | dr_flac is a single file library. To use it, do something like the following in one .c file. |
| 123 | |
| 124 | ```c |
| 125 | #define DR_FLAC_IMPLEMENTATION |
| 126 | #include "dr_flac.h" |
| 127 | ``` |
| 128 | |
| 129 | You can then #include this file in other parts of the program as you would with any other header file. To decode audio data, do something like the following: |
| 130 | |
| 131 | ```c |
| 132 | drflac* pFlac = drflac_open_file("MySong.flac", NULL); |
| 133 | if (pFlac == NULL) { |
| 134 | // Failed to open FLAC file |
| 135 | } |
| 136 | |
| 137 | drflac_int32* pSamples = malloc(pFlac->totalPCMFrameCount * pFlac->channels * sizeof(drflac_int32)); |
| 138 | drflac_uint64 numberOfInterleavedSamplesActuallyRead = drflac_read_pcm_frames_s32(pFlac, pFlac->totalPCMFrameCount, pSamples); |
| 139 | ``` |
| 140 | |
| 141 | The drflac object represents the decoder. It is a transparent type so all the information you need, such as the number of channels and the bits per sample, |
| 142 | should be directly accessible - just make sure you don't change their values. Samples are always output as interleaved signed 32-bit PCM. In the example above |
| 143 | a native FLAC stream was opened, however dr_flac has seamless support for Ogg encapsulated FLAC streams as well. |
| 144 | |
| 145 | You do not need to decode the entire stream in one go - you just specify how many samples you'd like at any given time and the decoder will give you as many |
| 146 | samples as it can, up to the amount requested. Later on when you need the next batch of samples, just call it again. Example: |
| 147 | |
| 148 | ```c |
| 149 | while (drflac_read_pcm_frames_s32(pFlac, chunkSizeInPCMFrames, pChunkSamples) > 0) { |
| 150 | do_something(); |
| 151 | } |
| 152 | ``` |
| 153 | |
| 154 | You can seek to a specific PCM frame with `drflac_seek_to_pcm_frame()`. |
| 155 | |
| 156 | If you just want to quickly decode an entire FLAC file in one go you can do something like this: |
| 157 | |
| 158 | ```c |
| 159 | unsigned int channels; |
| 160 | unsigned int sampleRate; |
| 161 | drflac_uint64 totalPCMFrameCount; |
| 162 | drflac_int32* pSampleData = drflac_open_file_and_read_pcm_frames_s32("MySong.flac", &channels, &sampleRate, &totalPCMFrameCount, NULL); |
| 163 | if (pSampleData == NULL) { |
| 164 | // Failed to open and decode FLAC file. |
| 165 | } |
| 166 | |
| 167 | ... |
| 168 | |
| 169 | drflac_free(pSampleData, NULL); |
| 170 | ``` |
| 171 | |
| 172 | You can read samples as signed 16-bit integer and 32-bit floating-point PCM with the *_s16() and *_f32() family of APIs respectively, but note that these |
| 173 | should be considered lossy. |
| 174 | |
| 175 | |
| 176 | If you need access to metadata (album art, etc.), use `drflac_open_with_metadata()`, `drflac_open_file_with_metdata()` or `drflac_open_memory_with_metadata()`. |
| 177 | The rationale for keeping these APIs separate is that they're slightly slower than the normal versions and also just a little bit harder to use. dr_flac |
| 178 | reports metadata to the application through the use of a callback, and every metadata block is reported before `drflac_open_with_metdata()` returns. |
| 179 | |
| 180 | The main opening APIs (`drflac_open()`, etc.) will fail if the header is not present. The presents a problem in certain scenarios such as broadcast style |
| 181 | streams or internet radio where the header may not be present because the user has started playback mid-stream. To handle this, use the relaxed APIs: |
| 182 | |
| 183 | `drflac_open_relaxed()` |
| 184 | `drflac_open_with_metadata_relaxed()` |
| 185 | |
| 186 | It is not recommended to use these APIs for file based streams because a missing header would usually indicate a corrupt or perverse file. In addition, these |
| 187 | APIs can take a long time to initialize because they may need to spend a lot of time finding the first frame. |
| 188 | |
| 189 | |
| 190 | |
| 191 | Build Options |
| 192 | ============= |
| 193 | #define these options before including this file. |
| 194 | |
| 195 | #define DR_FLAC_NO_STDIO |
| 196 | Disable `drflac_open_file()` and family. |
| 197 | |
| 198 | #define DR_FLAC_NO_OGG |
| 199 | Disables support for Ogg/FLAC streams. |
| 200 | |
| 201 | #define DR_FLAC_BUFFER_SIZE <number> |
| 202 | Defines the size of the internal buffer to store data from onRead(). This buffer is used to reduce the number of calls back to the client for more data. |
| 203 | Larger values means more memory, but better performance. My tests show diminishing returns after about 4KB (which is the default). Consider reducing this if |
| 204 | you have a very efficient implementation of onRead(), or increase it if it's very inefficient. Must be a multiple of 8. |
| 205 | |
| 206 | #define DR_FLAC_NO_CRC |
| 207 | Disables CRC checks. This will offer a performance boost when CRC is unnecessary. This will disable binary search seeking. When seeking, the seek table will |
| 208 | be used if available. Otherwise the seek will be performed using brute force. |
| 209 | |
| 210 | #define DR_FLAC_NO_SIMD |
| 211 | Disables SIMD optimizations (SSE on x86/x64 architectures, NEON on ARM architectures). Use this if you are having compatibility issues with your compiler. |
| 212 | |
| 213 | |
| 214 | |
| 215 | Notes |
| 216 | ===== |
| 217 | - dr_flac does not support changing the sample rate nor channel count mid stream. |
| 218 | - dr_flac is not thread-safe, but its APIs can be called from any thread so long as you do your own synchronization. |
| 219 | - When using Ogg encapsulation, a corrupted metadata block will result in `drflac_open_with_metadata()` and `drflac_open()` returning inconsistent samples due |
| 220 | to differences in corrupted stream recorvery logic between the two APIs. |
| 221 | */ |
| 222 | |
| 223 | #ifndef dr_flac_h |
| 224 | #define dr_flac_h |
| 225 | |
| 226 | #ifdef __cplusplus |
| 227 | extern "C" { |
| 228 | #endif |
| 229 | |
| 230 | #define DRFLAC_STRINGIFY(x) #x |
| 231 | #define DRFLAC_XSTRINGIFY(x) DRFLAC_STRINGIFY(x) |
| 232 | |
| 233 | #define DRFLAC_VERSION_MAJOR 0 |
| 234 | #define DRFLAC_VERSION_MINOR 12 |
| 235 | #define DRFLAC_VERSION_REVISION 28 |
| 236 | #define DRFLAC_VERSION_STRING DRFLAC_XSTRINGIFY(DRFLAC_VERSION_MAJOR) "." DRFLAC_XSTRINGIFY(DRFLAC_VERSION_MINOR) "." DRFLAC_XSTRINGIFY(DRFLAC_VERSION_REVISION) |
| 237 | |
| 238 | #include <stddef.h> /* For size_t. */ |
| 239 | |
| 240 | /* Sized types. */ |
| 241 | typedef signed char drflac_int8; |
| 242 | typedef unsigned char drflac_uint8; |
| 243 | typedef signed short drflac_int16; |
| 244 | typedef unsigned short drflac_uint16; |
| 245 | typedef signed int drflac_int32; |
| 246 | typedef unsigned int drflac_uint32; |
| 247 | #if defined(_MSC_VER) |
| 248 | typedef signed __int64 drflac_int64; |
| 249 | typedef unsigned __int64 drflac_uint64; |
| 250 | #else |
| 251 | #if defined(__clang__) || (defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6))) |
| 252 | #pragma GCC diagnostic push |
| 253 | #pragma GCC diagnostic ignored "-Wlong-long" |
| 254 | #if defined(__clang__) |
| 255 | #pragma GCC diagnostic ignored "-Wc++11-long-long" |
| 256 | #endif |
| 257 | #endif |
| 258 | typedef signed long long drflac_int64; |
| 259 | typedef unsigned long long drflac_uint64; |
| 260 | #if defined(__clang__) || (defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6))) |
| 261 | #pragma GCC diagnostic pop |
| 262 | #endif |
| 263 | #endif |
| 264 | #if defined(__LP64__) || defined(_WIN64) || (defined(__x86_64__) && !defined(__ILP32__)) || defined(_M_X64) || defined(__ia64) || defined (_M_IA64) || defined(__aarch64__) || defined(__powerpc64__) |
| 265 | typedef drflac_uint64 drflac_uintptr; |
| 266 | #else |
| 267 | typedef drflac_uint32 drflac_uintptr; |
| 268 | #endif |
| 269 | typedef drflac_uint8 drflac_bool8; |
| 270 | typedef drflac_uint32 drflac_bool32; |
| 271 | #define DRFLAC_TRUE 1 |
| 272 | #define DRFLAC_FALSE 0 |
| 273 | |
| 274 | #if !defined(DRFLAC_API) |
| 275 | #if defined(DRFLAC_DLL) |
| 276 | #if defined(_WIN32) |
| 277 | #define DRFLAC_DLL_IMPORT __declspec(dllimport) |
| 278 | #define DRFLAC_DLL_EXPORT __declspec(dllexport) |
| 279 | #define DRFLAC_DLL_PRIVATE static |
| 280 | #else |
| 281 | #if defined(__GNUC__) && __GNUC__ >= 4 |
| 282 | #define DRFLAC_DLL_IMPORT __attribute__((visibility("default"))) |
| 283 | #define DRFLAC_DLL_EXPORT __attribute__((visibility("default"))) |
| 284 | #define DRFLAC_DLL_PRIVATE __attribute__((visibility("hidden"))) |
| 285 | #else |
| 286 | #define DRFLAC_DLL_IMPORT |
| 287 | #define DRFLAC_DLL_EXPORT |
| 288 | #define DRFLAC_DLL_PRIVATE static |
| 289 | #endif |
| 290 | #endif |
| 291 | |
| 292 | #if defined(DR_FLAC_IMPLEMENTATION) || defined(DRFLAC_IMPLEMENTATION) |
| 293 | #define DRFLAC_API DRFLAC_DLL_EXPORT |
| 294 | #else |
| 295 | #define DRFLAC_API DRFLAC_DLL_IMPORT |
| 296 | #endif |
| 297 | #define DRFLAC_PRIVATE DRFLAC_DLL_PRIVATE |
| 298 | #else |
| 299 | #define DRFLAC_API extern |
| 300 | #define DRFLAC_PRIVATE static |
| 301 | #endif |
| 302 | #endif |
| 303 | |
| 304 | #if defined(_MSC_VER) && _MSC_VER >= 1700 /* Visual Studio 2012 */ |
| 305 | #define DRFLAC_DEPRECATED __declspec(deprecated) |
| 306 | #elif (defined(__GNUC__) && __GNUC__ >= 4) /* GCC 4 */ |
| 307 | #define DRFLAC_DEPRECATED __attribute__((deprecated)) |
| 308 | #elif defined(__has_feature) /* Clang */ |
| 309 | #if __has_feature(attribute_deprecated) |
| 310 | #define DRFLAC_DEPRECATED __attribute__((deprecated)) |
| 311 | #else |
| 312 | #define DRFLAC_DEPRECATED |
| 313 | #endif |
| 314 | #else |
| 315 | #define DRFLAC_DEPRECATED |
| 316 | #endif |
| 317 | |
| 318 | DRFLAC_API void drflac_version(drflac_uint32* pMajor, drflac_uint32* pMinor, drflac_uint32* pRevision); |
| 319 | DRFLAC_API const char* drflac_version_string(void); |
| 320 | |
| 321 | /* |
| 322 | As data is read from the client it is placed into an internal buffer for fast access. This controls the size of that buffer. Larger values means more speed, |
| 323 | but also more memory. In my testing there is diminishing returns after about 4KB, but you can fiddle with this to suit your own needs. Must be a multiple of 8. |
| 324 | */ |
| 325 | #ifndef DR_FLAC_BUFFER_SIZE |
| 326 | #define DR_FLAC_BUFFER_SIZE 4096 |
| 327 | #endif |
| 328 | |
| 329 | /* Check if we can enable 64-bit optimizations. */ |
| 330 | #if defined(_WIN64) || defined(_LP64) || defined(__LP64__) |
| 331 | #define DRFLAC_64BIT |
| 332 | #endif |
| 333 | |
| 334 | #ifdef DRFLAC_64BIT |
| 335 | typedef drflac_uint64 drflac_cache_t; |
| 336 | #else |
| 337 | typedef drflac_uint32 drflac_cache_t; |
| 338 | #endif |
| 339 | |
| 340 | /* The various metadata block types. */ |
| 341 | #define DRFLAC_METADATA_BLOCK_TYPE_STREAMINFO 0 |
| 342 | #define DRFLAC_METADATA_BLOCK_TYPE_PADDING 1 |
| 343 | #define DRFLAC_METADATA_BLOCK_TYPE_APPLICATION 2 |
| 344 | #define DRFLAC_METADATA_BLOCK_TYPE_SEEKTABLE 3 |
| 345 | #define DRFLAC_METADATA_BLOCK_TYPE_VORBIS_COMMENT 4 |
| 346 | #define DRFLAC_METADATA_BLOCK_TYPE_CUESHEET 5 |
| 347 | #define DRFLAC_METADATA_BLOCK_TYPE_PICTURE 6 |
| 348 | #define DRFLAC_METADATA_BLOCK_TYPE_INVALID 127 |
| 349 | |
| 350 | /* The various picture types specified in the PICTURE block. */ |
| 351 | #define DRFLAC_PICTURE_TYPE_OTHER 0 |
| 352 | #define DRFLAC_PICTURE_TYPE_FILE_ICON 1 |
| 353 | #define DRFLAC_PICTURE_TYPE_OTHER_FILE_ICON 2 |
| 354 | #define DRFLAC_PICTURE_TYPE_COVER_FRONT 3 |
| 355 | #define DRFLAC_PICTURE_TYPE_COVER_BACK 4 |
| 356 | #define DRFLAC_PICTURE_TYPE_LEAFLET_PAGE 5 |
| 357 | #define DRFLAC_PICTURE_TYPE_MEDIA 6 |
| 358 | #define DRFLAC_PICTURE_TYPE_LEAD_ARTIST 7 |
| 359 | #define DRFLAC_PICTURE_TYPE_ARTIST 8 |
| 360 | #define DRFLAC_PICTURE_TYPE_CONDUCTOR 9 |
| 361 | #define DRFLAC_PICTURE_TYPE_BAND 10 |
| 362 | #define DRFLAC_PICTURE_TYPE_COMPOSER 11 |
| 363 | #define DRFLAC_PICTURE_TYPE_LYRICIST 12 |
| 364 | #define DRFLAC_PICTURE_TYPE_RECORDING_LOCATION 13 |
| 365 | #define DRFLAC_PICTURE_TYPE_DURING_RECORDING 14 |
| 366 | #define DRFLAC_PICTURE_TYPE_DURING_PERFORMANCE 15 |
| 367 | #define DRFLAC_PICTURE_TYPE_SCREEN_CAPTURE 16 |
| 368 | #define DRFLAC_PICTURE_TYPE_BRIGHT_COLORED_FISH 17 |
| 369 | #define DRFLAC_PICTURE_TYPE_ILLUSTRATION 18 |
| 370 | #define DRFLAC_PICTURE_TYPE_BAND_LOGOTYPE 19 |
| 371 | #define DRFLAC_PICTURE_TYPE_PUBLISHER_LOGOTYPE 20 |
| 372 | |
| 373 | typedef enum |
| 374 | { |
| 375 | drflac_container_native, |
| 376 | drflac_container_ogg, |
| 377 | drflac_container_unknown |
| 378 | } drflac_container; |
| 379 | |
| 380 | typedef enum |
| 381 | { |
| 382 | drflac_seek_origin_start, |
| 383 | drflac_seek_origin_current |
| 384 | } drflac_seek_origin; |
| 385 | |
| 386 | /* Packing is important on this structure because we map this directly to the raw data within the SEEKTABLE metadata block. */ |
| 387 | #pragma pack(2) |
| 388 | typedef struct |
| 389 | { |
| 390 | drflac_uint64 firstPCMFrame; |
| 391 | drflac_uint64 flacFrameOffset; /* The offset from the first byte of the header of the first frame. */ |
| 392 | drflac_uint16 pcmFrameCount; |
| 393 | } drflac_seekpoint; |
| 394 | #pragma pack() |
| 395 | |
| 396 | typedef struct |
| 397 | { |
| 398 | drflac_uint16 minBlockSizeInPCMFrames; |
| 399 | drflac_uint16 maxBlockSizeInPCMFrames; |
| 400 | drflac_uint32 minFrameSizeInPCMFrames; |
| 401 | drflac_uint32 maxFrameSizeInPCMFrames; |
| 402 | drflac_uint32 sampleRate; |
| 403 | drflac_uint8 channels; |
| 404 | drflac_uint8 bitsPerSample; |
| 405 | drflac_uint64 totalPCMFrameCount; |
| 406 | drflac_uint8 md5[16]; |
| 407 | } drflac_streaminfo; |
| 408 | |
| 409 | typedef struct |
| 410 | { |
| 411 | /* |
| 412 | The metadata type. Use this to know how to interpret the data below. Will be set to one of the |
| 413 | DRFLAC_METADATA_BLOCK_TYPE_* tokens. |
| 414 | */ |
| 415 | drflac_uint32 type; |
| 416 | |
| 417 | /* |
| 418 | A pointer to the raw data. This points to a temporary buffer so don't hold on to it. It's best to |
| 419 | not modify the contents of this buffer. Use the structures below for more meaningful and structured |
| 420 | information about the metadata. It's possible for this to be null. |
| 421 | */ |
| 422 | const void* pRawData; |
| 423 | |
| 424 | /* The size in bytes of the block and the buffer pointed to by pRawData if it's non-NULL. */ |
| 425 | drflac_uint32 rawDataSize; |
| 426 | |
| 427 | union |
| 428 | { |
| 429 | drflac_streaminfo streaminfo; |
| 430 | |
| 431 | struct |
| 432 | { |
| 433 | int unused; |
| 434 | } padding; |
| 435 | |
| 436 | struct |
| 437 | { |
| 438 | drflac_uint32 id; |
| 439 | const void* pData; |
| 440 | drflac_uint32 dataSize; |
| 441 | } application; |
| 442 | |
| 443 | struct |
| 444 | { |
| 445 | drflac_uint32 seekpointCount; |
| 446 | const drflac_seekpoint* pSeekpoints; |
| 447 | } seektable; |
| 448 | |
| 449 | struct |
| 450 | { |
| 451 | drflac_uint32 vendorLength; |
| 452 | const char* vendor; |
| 453 | drflac_uint32 commentCount; |
| 454 | const void* pComments; |
| 455 | } vorbis_comment; |
| 456 | |
| 457 | struct |
| 458 | { |
| 459 | char catalog[128]; |
| 460 | drflac_uint64 leadInSampleCount; |
| 461 | drflac_bool32 isCD; |
| 462 | drflac_uint8 trackCount; |
| 463 | const void* pTrackData; |
| 464 | } cuesheet; |
| 465 | |
| 466 | struct |
| 467 | { |
| 468 | drflac_uint32 type; |
| 469 | drflac_uint32 mimeLength; |
| 470 | const char* mime; |
| 471 | drflac_uint32 descriptionLength; |
| 472 | const char* description; |
| 473 | drflac_uint32 width; |
| 474 | drflac_uint32 height; |
| 475 | drflac_uint32 colorDepth; |
| 476 | drflac_uint32 indexColorCount; |
| 477 | drflac_uint32 pictureDataSize; |
| 478 | const drflac_uint8* pPictureData; |
| 479 | } picture; |
| 480 | } data; |
| 481 | } drflac_metadata; |
| 482 | |
| 483 | |
| 484 | /* |
| 485 | Callback for when data needs to be read from the client. |
| 486 | |
| 487 | |
| 488 | Parameters |
| 489 | ---------- |
| 490 | pUserData (in) |
| 491 | The user data that was passed to drflac_open() and family. |
| 492 | |
| 493 | pBufferOut (out) |
| 494 | The output buffer. |
| 495 | |
| 496 | bytesToRead (in) |
| 497 | The number of bytes to read. |
| 498 | |
| 499 | |
| 500 | Return Value |
| 501 | ------------ |
| 502 | The number of bytes actually read. |
| 503 | |
| 504 | |
| 505 | Remarks |
| 506 | ------- |
| 507 | A return value of less than bytesToRead indicates the end of the stream. Do _not_ return from this callback until either the entire bytesToRead is filled or |
| 508 | you have reached the end of the stream. |
| 509 | */ |
| 510 | typedef size_t (* drflac_read_proc)(void* pUserData, void* pBufferOut, size_t bytesToRead); |
| 511 | |
| 512 | /* |
| 513 | Callback for when data needs to be seeked. |
| 514 | |
| 515 | |
| 516 | Parameters |
| 517 | ---------- |
| 518 | pUserData (in) |
| 519 | The user data that was passed to drflac_open() and family. |
| 520 | |
| 521 | offset (in) |
| 522 | The number of bytes to move, relative to the origin. Will never be negative. |
| 523 | |
| 524 | origin (in) |
| 525 | The origin of the seek - the current position or the start of the stream. |
| 526 | |
| 527 | |
| 528 | Return Value |
| 529 | ------------ |
| 530 | Whether or not the seek was successful. |
| 531 | |
| 532 | |
| 533 | Remarks |
| 534 | ------- |
| 535 | The offset will never be negative. Whether or not it is relative to the beginning or current position is determined by the "origin" parameter which will be |
| 536 | either drflac_seek_origin_start or drflac_seek_origin_current. |
| 537 | |
| 538 | When seeking to a PCM frame using drflac_seek_to_pcm_frame(), dr_flac may call this with an offset beyond the end of the FLAC stream. This needs to be detected |
| 539 | and handled by returning DRFLAC_FALSE. |
| 540 | */ |
| 541 | typedef drflac_bool32 (* drflac_seek_proc)(void* pUserData, int offset, drflac_seek_origin origin); |
| 542 | |
| 543 | /* |
| 544 | Callback for when a metadata block is read. |
| 545 | |
| 546 | |
| 547 | Parameters |
| 548 | ---------- |
| 549 | pUserData (in) |
| 550 | The user data that was passed to drflac_open() and family. |
| 551 | |
| 552 | pMetadata (in) |
| 553 | A pointer to a structure containing the data of the metadata block. |
| 554 | |
| 555 | |
| 556 | Remarks |
| 557 | ------- |
| 558 | Use pMetadata->type to determine which metadata block is being handled and how to read the data. This |
| 559 | will be set to one of the DRFLAC_METADATA_BLOCK_TYPE_* tokens. |
| 560 | */ |
| 561 | typedef void (* drflac_meta_proc)(void* pUserData, drflac_metadata* pMetadata); |
| 562 | |
| 563 | |
| 564 | typedef struct |
| 565 | { |
| 566 | void* pUserData; |
| 567 | void* (* onMalloc)(size_t sz, void* pUserData); |
| 568 | void* (* onRealloc)(void* p, size_t sz, void* pUserData); |
| 569 | void (* onFree)(void* p, void* pUserData); |
| 570 | } drflac_allocation_callbacks; |
| 571 | |
| 572 | /* Structure for internal use. Only used for decoders opened with drflac_open_memory. */ |
| 573 | typedef struct |
| 574 | { |
| 575 | const drflac_uint8* data; |
| 576 | size_t dataSize; |
| 577 | size_t currentReadPos; |
| 578 | } drflac__memory_stream; |
| 579 | |
| 580 | /* Structure for internal use. Used for bit streaming. */ |
| 581 | typedef struct |
| 582 | { |
| 583 | /* The function to call when more data needs to be read. */ |
| 584 | drflac_read_proc onRead; |
| 585 | |
| 586 | /* The function to call when the current read position needs to be moved. */ |
| 587 | drflac_seek_proc onSeek; |
| 588 | |
| 589 | /* The user data to pass around to onRead and onSeek. */ |
| 590 | void* pUserData; |
| 591 | |
| 592 | |
| 593 | /* |
| 594 | The number of unaligned bytes in the L2 cache. This will always be 0 until the end of the stream is hit. At the end of the |
| 595 | stream there will be a number of bytes that don't cleanly fit in an L1 cache line, so we use this variable to know whether |
| 596 | or not the bistreamer needs to run on a slower path to read those last bytes. This will never be more than sizeof(drflac_cache_t). |
| 597 | */ |
| 598 | size_t unalignedByteCount; |
| 599 | |
| 600 | /* The content of the unaligned bytes. */ |
| 601 | drflac_cache_t unalignedCache; |
| 602 | |
| 603 | /* The index of the next valid cache line in the "L2" cache. */ |
| 604 | drflac_uint32 nextL2Line; |
| 605 | |
| 606 | /* The number of bits that have been consumed by the cache. This is used to determine how many valid bits are remaining. */ |
| 607 | drflac_uint32 consumedBits; |
| 608 | |
| 609 | /* |
| 610 | The cached data which was most recently read from the client. There are two levels of cache. Data flows as such: |
| 611 | Client -> L2 -> L1. The L2 -> L1 movement is aligned and runs on a fast path in just a few instructions. |
| 612 | */ |
| 613 | drflac_cache_t cacheL2[DR_FLAC_BUFFER_SIZE/sizeof(drflac_cache_t)]; |
| 614 | drflac_cache_t cache; |
| 615 | |
| 616 | /* |
| 617 | CRC-16. This is updated whenever bits are read from the bit stream. Manually set this to 0 to reset the CRC. For FLAC, this |
| 618 | is reset to 0 at the beginning of each frame. |
| 619 | */ |
| 620 | drflac_uint16 crc16; |
| 621 | drflac_cache_t crc16Cache; /* A cache for optimizing CRC calculations. This is filled when when the L1 cache is reloaded. */ |
| 622 | drflac_uint32 crc16CacheIgnoredBytes; /* The number of bytes to ignore when updating the CRC-16 from the CRC-16 cache. */ |
| 623 | } drflac_bs; |
| 624 | |
| 625 | typedef struct |
| 626 | { |
| 627 | /* The type of the subframe: SUBFRAME_CONSTANT, SUBFRAME_VERBATIM, SUBFRAME_FIXED or SUBFRAME_LPC. */ |
| 628 | drflac_uint8 subframeType; |
| 629 | |
| 630 | /* The number of wasted bits per sample as specified by the sub-frame header. */ |
| 631 | drflac_uint8 wastedBitsPerSample; |
| 632 | |
| 633 | /* The order to use for the prediction stage for SUBFRAME_FIXED and SUBFRAME_LPC. */ |
| 634 | drflac_uint8 lpcOrder; |
| 635 | |
| 636 | /* A pointer to the buffer containing the decoded samples in the subframe. This pointer is an offset from drflac::pExtraData. */ |
| 637 | drflac_int32* pSamplesS32; |
| 638 | } drflac_subframe; |
| 639 | |
| 640 | typedef struct |
| 641 | { |
| 642 | /* |
| 643 | If the stream uses variable block sizes, this will be set to the index of the first PCM frame. If fixed block sizes are used, this will |
| 644 | always be set to 0. This is 64-bit because the decoded PCM frame number will be 36 bits. |
| 645 | */ |
| 646 | drflac_uint64 pcmFrameNumber; |
| 647 | |
| 648 | /* |
| 649 | If the stream uses fixed block sizes, this will be set to the frame number. If variable block sizes are used, this will always be 0. This |
| 650 | is 32-bit because in fixed block sizes, the maximum frame number will be 31 bits. |
| 651 | */ |
| 652 | drflac_uint32 flacFrameNumber; |
| 653 | |
| 654 | /* The sample rate of this frame. */ |
| 655 | drflac_uint32 sampleRate; |
| 656 | |
| 657 | /* The number of PCM frames in each sub-frame within this frame. */ |
| 658 | drflac_uint16 blockSizeInPCMFrames; |
| 659 | |
| 660 | /* |
| 661 | The channel assignment of this frame. This is not always set to the channel count. If interchannel decorrelation is being used this |
| 662 | will be set to DRFLAC_CHANNEL_ASSIGNMENT_LEFT_SIDE, DRFLAC_CHANNEL_ASSIGNMENT_RIGHT_SIDE or DRFLAC_CHANNEL_ASSIGNMENT_MID_SIDE. |
| 663 | */ |
| 664 | drflac_uint8 channelAssignment; |
| 665 | |
| 666 | /* The number of bits per sample within this frame. */ |
| 667 | drflac_uint8 bitsPerSample; |
| 668 | |
| 669 | /* The frame's CRC. */ |
| 670 | drflac_uint8 crc8; |
| 671 | } drflac_frame_header; |
| 672 | |
| 673 | typedef struct |
| 674 | { |
| 675 | /* The header. */ |
| 676 | drflac_frame_header header; |
| 677 | |
| 678 | /* |
| 679 | The number of PCM frames left to be read in this FLAC frame. This is initially set to the block size. As PCM frames are read, |
| 680 | this will be decremented. When it reaches 0, the decoder will see this frame as fully consumed and load the next frame. |
| 681 | */ |
| 682 | drflac_uint32 pcmFramesRemaining; |
| 683 | |
| 684 | /* The list of sub-frames within the frame. There is one sub-frame for each channel, and there's a maximum of 8 channels. */ |
| 685 | drflac_subframe subframes[8]; |
| 686 | } drflac_frame; |
| 687 | |
| 688 | typedef struct |
| 689 | { |
| 690 | /* The function to call when a metadata block is read. */ |
| 691 | drflac_meta_proc onMeta; |
| 692 | |
| 693 | /* The user data posted to the metadata callback function. */ |
| 694 | void* pUserDataMD; |
| 695 | |
| 696 | /* Memory allocation callbacks. */ |
| 697 | drflac_allocation_callbacks allocationCallbacks; |
| 698 | |
| 699 | |
| 700 | /* The sample rate. Will be set to something like 44100. */ |
| 701 | drflac_uint32 sampleRate; |
| 702 | |
| 703 | /* |
| 704 | The number of channels. This will be set to 1 for monaural streams, 2 for stereo, etc. Maximum 8. This is set based on the |
| 705 | value specified in the STREAMINFO block. |
| 706 | */ |
| 707 | drflac_uint8 channels; |
| 708 | |
| 709 | /* The bits per sample. Will be set to something like 16, 24, etc. */ |
| 710 | drflac_uint8 bitsPerSample; |
| 711 | |
| 712 | /* The maximum block size, in samples. This number represents the number of samples in each channel (not combined). */ |
| 713 | drflac_uint16 maxBlockSizeInPCMFrames; |
| 714 | |
| 715 | /* |
| 716 | The total number of PCM Frames making up the stream. Can be 0 in which case it's still a valid stream, but just means |
| 717 | the total PCM frame count is unknown. Likely the case with streams like internet radio. |
| 718 | */ |
| 719 | drflac_uint64 totalPCMFrameCount; |
| 720 | |
| 721 | |
| 722 | /* The container type. This is set based on whether or not the decoder was opened from a native or Ogg stream. */ |
| 723 | drflac_container container; |
| 724 | |
| 725 | /* The number of seekpoints in the seektable. */ |
| 726 | drflac_uint32 seekpointCount; |
| 727 | |
| 728 | |
| 729 | /* Information about the frame the decoder is currently sitting on. */ |
| 730 | drflac_frame currentFLACFrame; |
| 731 | |
| 732 | |
| 733 | /* The index of the PCM frame the decoder is currently sitting on. This is only used for seeking. */ |
| 734 | drflac_uint64 currentPCMFrame; |
| 735 | |
| 736 | /* The position of the first FLAC frame in the stream. This is only ever used for seeking. */ |
| 737 | drflac_uint64 firstFLACFramePosInBytes; |
| 738 | |
| 739 | |
| 740 | /* A hack to avoid a malloc() when opening a decoder with drflac_open_memory(). */ |
| 741 | drflac__memory_stream memoryStream; |
| 742 | |
| 743 | |
| 744 | /* A pointer to the decoded sample data. This is an offset of pExtraData. */ |
| 745 | drflac_int32* pDecodedSamples; |
| 746 | |
| 747 | /* A pointer to the seek table. This is an offset of pExtraData, or NULL if there is no seek table. */ |
| 748 | drflac_seekpoint* pSeekpoints; |
| 749 | |
| 750 | /* Internal use only. Only used with Ogg containers. Points to a drflac_oggbs object. This is an offset of pExtraData. */ |
| 751 | void* _oggbs; |
| 752 | |
| 753 | /* Internal use only. Used for profiling and testing different seeking modes. */ |
| 754 | drflac_bool32 _noSeekTableSeek : 1; |
| 755 | drflac_bool32 _noBinarySearchSeek : 1; |
| 756 | drflac_bool32 _noBruteForceSeek : 1; |
| 757 | |
| 758 | /* The bit streamer. The raw FLAC data is fed through this object. */ |
| 759 | drflac_bs bs; |
| 760 | |
| 761 | /* Variable length extra data. We attach this to the end of the object so we can avoid unnecessary mallocs. */ |
| 762 | drflac_uint8 pExtraData[1]; |
| 763 | } drflac; |
| 764 | |
| 765 | |
| 766 | /* |
| 767 | Opens a FLAC decoder. |
| 768 | |
| 769 | |
| 770 | Parameters |
| 771 | ---------- |
| 772 | onRead (in) |
| 773 | The function to call when data needs to be read from the client. |
| 774 | |
| 775 | onSeek (in) |
| 776 | The function to call when the read position of the client data needs to move. |
| 777 | |
| 778 | pUserData (in, optional) |
| 779 | A pointer to application defined data that will be passed to onRead and onSeek. |
| 780 | |
| 781 | pAllocationCallbacks (in, optional) |
| 782 | A pointer to application defined callbacks for managing memory allocations. |
| 783 | |
| 784 | |
| 785 | Return Value |
| 786 | ------------ |
| 787 | Returns a pointer to an object representing the decoder. |
| 788 | |
| 789 | |
| 790 | Remarks |
| 791 | ------- |
| 792 | Close the decoder with `drflac_close()`. |
| 793 | |
| 794 | `pAllocationCallbacks` can be NULL in which case it will use `DRFLAC_MALLOC`, `DRFLAC_REALLOC` and `DRFLAC_FREE`. |
| 795 | |
| 796 | This function will automatically detect whether or not you are attempting to open a native or Ogg encapsulated FLAC, both of which should work seamlessly |
| 797 | without any manual intervention. Ogg encapsulation also works with multiplexed streams which basically means it can play FLAC encoded audio tracks in videos. |
| 798 | |
| 799 | This is the lowest level function for opening a FLAC stream. You can also use `drflac_open_file()` and `drflac_open_memory()` to open the stream from a file or |
| 800 | from a block of memory respectively. |
| 801 | |
| 802 | The STREAMINFO block must be present for this to succeed. Use `drflac_open_relaxed()` to open a FLAC stream where the header may not be present. |
| 803 | |
| 804 | Use `drflac_open_with_metadata()` if you need access to metadata. |
| 805 | |
| 806 | |
| 807 | Seek Also |
| 808 | --------- |
| 809 | drflac_open_file() |
| 810 | drflac_open_memory() |
| 811 | drflac_open_with_metadata() |
| 812 | drflac_close() |
| 813 | */ |
| 814 | DRFLAC_API drflac* drflac_open(drflac_read_proc onRead, drflac_seek_proc onSeek, void* pUserData, const drflac_allocation_callbacks* pAllocationCallbacks); |
| 815 | |
| 816 | /* |
| 817 | Opens a FLAC stream with relaxed validation of the header block. |
| 818 | |
| 819 | |
| 820 | Parameters |
| 821 | ---------- |
| 822 | onRead (in) |
| 823 | The function to call when data needs to be read from the client. |
| 824 | |
| 825 | onSeek (in) |
| 826 | The function to call when the read position of the client data needs to move. |
| 827 | |
| 828 | container (in) |
| 829 | Whether or not the FLAC stream is encapsulated using standard FLAC encapsulation or Ogg encapsulation. |
| 830 | |
| 831 | pUserData (in, optional) |
| 832 | A pointer to application defined data that will be passed to onRead and onSeek. |
| 833 | |
| 834 | pAllocationCallbacks (in, optional) |
| 835 | A pointer to application defined callbacks for managing memory allocations. |
| 836 | |
| 837 | |
| 838 | Return Value |
| 839 | ------------ |
| 840 | A pointer to an object representing the decoder. |
| 841 | |
| 842 | |
| 843 | Remarks |
| 844 | ------- |
| 845 | The same as drflac_open(), except attempts to open the stream even when a header block is not present. |
| 846 | |
| 847 | Because the header is not necessarily available, the caller must explicitly define the container (Native or Ogg). Do not set this to `drflac_container_unknown` |
| 848 | as that is for internal use only. |
| 849 | |
| 850 | Opening in relaxed mode will continue reading data from onRead until it finds a valid frame. If a frame is never found it will continue forever. To abort, |
| 851 | force your `onRead` callback to return 0, which dr_flac will use as an indicator that the end of the stream was found. |
| 852 | |
| 853 | Use `drflac_open_with_metadata_relaxed()` if you need access to metadata. |
| 854 | */ |
| 855 | DRFLAC_API drflac* drflac_open_relaxed(drflac_read_proc onRead, drflac_seek_proc onSeek, drflac_container container, void* pUserData, const drflac_allocation_callbacks* pAllocationCallbacks); |
| 856 | |
| 857 | /* |
| 858 | Opens a FLAC decoder and notifies the caller of the metadata chunks (album art, etc.). |
| 859 | |
| 860 | |
| 861 | Parameters |
| 862 | ---------- |
| 863 | onRead (in) |
| 864 | The function to call when data needs to be read from the client. |
| 865 | |
| 866 | onSeek (in) |
| 867 | The function to call when the read position of the client data needs to move. |
| 868 | |
| 869 | onMeta (in) |
| 870 | The function to call for every metadata block. |
| 871 | |
| 872 | pUserData (in, optional) |
| 873 | A pointer to application defined data that will be passed to onRead, onSeek and onMeta. |
| 874 | |
| 875 | pAllocationCallbacks (in, optional) |
| 876 | A pointer to application defined callbacks for managing memory allocations. |
| 877 | |
| 878 | |
| 879 | Return Value |
| 880 | ------------ |
| 881 | A pointer to an object representing the decoder. |
| 882 | |
| 883 | |
| 884 | Remarks |
| 885 | ------- |
| 886 | Close the decoder with `drflac_close()`. |
| 887 | |
| 888 | `pAllocationCallbacks` can be NULL in which case it will use `DRFLAC_MALLOC`, `DRFLAC_REALLOC` and `DRFLAC_FREE`. |
| 889 | |
| 890 | This is slower than `drflac_open()`, so avoid this one if you don't need metadata. Internally, this will allocate and free memory on the heap for every |
| 891 | metadata block except for STREAMINFO and PADDING blocks. |
| 892 | |
| 893 | The caller is notified of the metadata via the `onMeta` callback. All metadata blocks will be handled before the function returns. This callback takes a |
| 894 | pointer to a `drflac_metadata` object which is a union containing the data of all relevant metadata blocks. Use the `type` member to discriminate against |
| 895 | the different metadata types. |
| 896 | |
| 897 | The STREAMINFO block must be present for this to succeed. Use `drflac_open_with_metadata_relaxed()` to open a FLAC stream where the header may not be present. |
| 898 | |
| 899 | Note that this will behave inconsistently with `drflac_open()` if the stream is an Ogg encapsulated stream and a metadata block is corrupted. This is due to |
| 900 | the way the Ogg stream recovers from corrupted pages. When `drflac_open_with_metadata()` is being used, the open routine will try to read the contents of the |
| 901 | metadata block, whereas `drflac_open()` will simply seek past it (for the sake of efficiency). This inconsistency can result in different samples being |
| 902 | returned depending on whether or not the stream is being opened with metadata. |
| 903 | |
| 904 | |
| 905 | Seek Also |
| 906 | --------- |
| 907 | drflac_open_file_with_metadata() |
| 908 | drflac_open_memory_with_metadata() |
| 909 | drflac_open() |
| 910 | drflac_close() |
| 911 | */ |
| 912 | DRFLAC_API drflac* drflac_open_with_metadata(drflac_read_proc onRead, drflac_seek_proc onSeek, drflac_meta_proc onMeta, void* pUserData, const drflac_allocation_callbacks* pAllocationCallbacks); |
| 913 | |
| 914 | /* |
| 915 | The same as drflac_open_with_metadata(), except attempts to open the stream even when a header block is not present. |
| 916 | |
| 917 | See Also |
| 918 | -------- |
| 919 | drflac_open_with_metadata() |
| 920 | drflac_open_relaxed() |
| 921 | */ |
| 922 | DRFLAC_API drflac* drflac_open_with_metadata_relaxed(drflac_read_proc onRead, drflac_seek_proc onSeek, drflac_meta_proc onMeta, drflac_container container, void* pUserData, const drflac_allocation_callbacks* pAllocationCallbacks); |
| 923 | |
| 924 | /* |
| 925 | Closes the given FLAC decoder. |
| 926 | |
| 927 | |
| 928 | Parameters |
| 929 | ---------- |
| 930 | pFlac (in) |
| 931 | The decoder to close. |
| 932 | |
| 933 | |
| 934 | Remarks |
| 935 | ------- |
| 936 | This will destroy the decoder object. |
| 937 | |
| 938 | |
| 939 | See Also |
| 940 | -------- |
| 941 | drflac_open() |
| 942 | drflac_open_with_metadata() |
| 943 | drflac_open_file() |
| 944 | drflac_open_file_w() |
| 945 | drflac_open_file_with_metadata() |
| 946 | drflac_open_file_with_metadata_w() |
| 947 | drflac_open_memory() |
| 948 | drflac_open_memory_with_metadata() |
| 949 | */ |
| 950 | DRFLAC_API void drflac_close(drflac* pFlac); |
| 951 | |
| 952 | |
| 953 | /* |
| 954 | Reads sample data from the given FLAC decoder, output as interleaved signed 32-bit PCM. |
| 955 | |
| 956 | |
| 957 | Parameters |
| 958 | ---------- |
| 959 | pFlac (in) |
| 960 | The decoder. |
| 961 | |
| 962 | framesToRead (in) |
| 963 | The number of PCM frames to read. |
| 964 | |
| 965 | pBufferOut (out, optional) |
| 966 | A pointer to the buffer that will receive the decoded samples. |
| 967 | |
| 968 | |
| 969 | Return Value |
| 970 | ------------ |
| 971 | Returns the number of PCM frames actually read. If the return value is less than `framesToRead` it has reached the end. |
| 972 | |
| 973 | |
| 974 | Remarks |
| 975 | ------- |
| 976 | pBufferOut can be null, in which case the call will act as a seek, and the return value will be the number of frames seeked. |
| 977 | */ |
| 978 | DRFLAC_API drflac_uint64 drflac_read_pcm_frames_s32(drflac* pFlac, drflac_uint64 framesToRead, drflac_int32* pBufferOut); |
| 979 | |
| 980 | |
| 981 | /* |
| 982 | Reads sample data from the given FLAC decoder, output as interleaved signed 16-bit PCM. |
| 983 | |
| 984 | |
| 985 | Parameters |
| 986 | ---------- |
| 987 | pFlac (in) |
| 988 | The decoder. |
| 989 | |
| 990 | framesToRead (in) |
| 991 | The number of PCM frames to read. |
| 992 | |
| 993 | pBufferOut (out, optional) |
| 994 | A pointer to the buffer that will receive the decoded samples. |
| 995 | |
| 996 | |
| 997 | Return Value |
| 998 | ------------ |
| 999 | Returns the number of PCM frames actually read. If the return value is less than `framesToRead` it has reached the end. |
| 1000 | |
| 1001 | |
| 1002 | Remarks |
| 1003 | ------- |
| 1004 | pBufferOut can be null, in which case the call will act as a seek, and the return value will be the number of frames seeked. |
| 1005 | |
| 1006 | Note that this is lossy for streams where the bits per sample is larger than 16. |
| 1007 | */ |
| 1008 | DRFLAC_API drflac_uint64 drflac_read_pcm_frames_s16(drflac* pFlac, drflac_uint64 framesToRead, drflac_int16* pBufferOut); |
| 1009 | |
| 1010 | /* |
| 1011 | Reads sample data from the given FLAC decoder, output as interleaved 32-bit floating point PCM. |
| 1012 | |
| 1013 | |
| 1014 | Parameters |
| 1015 | ---------- |
| 1016 | pFlac (in) |
| 1017 | The decoder. |
| 1018 | |
| 1019 | framesToRead (in) |
| 1020 | The number of PCM frames to read. |
| 1021 | |
| 1022 | pBufferOut (out, optional) |
| 1023 | A pointer to the buffer that will receive the decoded samples. |
| 1024 | |
| 1025 | |
| 1026 | Return Value |
| 1027 | ------------ |
| 1028 | Returns the number of PCM frames actually read. If the return value is less than `framesToRead` it has reached the end. |
| 1029 | |
| 1030 | |
| 1031 | Remarks |
| 1032 | ------- |
| 1033 | pBufferOut can be null, in which case the call will act as a seek, and the return value will be the number of frames seeked. |
| 1034 | |
| 1035 | Note that this should be considered lossy due to the nature of floating point numbers not being able to exactly represent every possible number. |
| 1036 | */ |
| 1037 | DRFLAC_API drflac_uint64 drflac_read_pcm_frames_f32(drflac* pFlac, drflac_uint64 framesToRead, float* pBufferOut); |
| 1038 | |
| 1039 | /* |
| 1040 | Seeks to the PCM frame at the given index. |
| 1041 | |
| 1042 | |
| 1043 | Parameters |
| 1044 | ---------- |
| 1045 | pFlac (in) |
| 1046 | The decoder. |
| 1047 | |
| 1048 | pcmFrameIndex (in) |
| 1049 | The index of the PCM frame to seek to. See notes below. |
| 1050 | |
| 1051 | |
| 1052 | Return Value |
| 1053 | ------------- |
| 1054 | `DRFLAC_TRUE` if successful; `DRFLAC_FALSE` otherwise. |
| 1055 | */ |
| 1056 | DRFLAC_API drflac_bool32 drflac_seek_to_pcm_frame(drflac* pFlac, drflac_uint64 pcmFrameIndex); |
| 1057 | |
| 1058 | |
| 1059 | |
| 1060 | #ifndef DR_FLAC_NO_STDIO |
| 1061 | /* |
| 1062 | Opens a FLAC decoder from the file at the given path. |
| 1063 | |
| 1064 | |
| 1065 | Parameters |
| 1066 | ---------- |
| 1067 | pFileName (in) |
| 1068 | The path of the file to open, either absolute or relative to the current directory. |
| 1069 | |
| 1070 | pAllocationCallbacks (in, optional) |
| 1071 | A pointer to application defined callbacks for managing memory allocations. |
| 1072 | |
| 1073 | |
| 1074 | Return Value |
| 1075 | ------------ |
| 1076 | A pointer to an object representing the decoder. |
| 1077 | |
| 1078 | |
| 1079 | Remarks |
| 1080 | ------- |
| 1081 | Close the decoder with drflac_close(). |
| 1082 | |
| 1083 | |
| 1084 | Remarks |
| 1085 | ------- |
| 1086 | This will hold a handle to the file until the decoder is closed with drflac_close(). Some platforms will restrict the number of files a process can have open |
| 1087 | at any given time, so keep this mind if you have many decoders open at the same time. |
| 1088 | |
| 1089 | |
| 1090 | See Also |
| 1091 | -------- |
| 1092 | drflac_open_file_with_metadata() |
| 1093 | drflac_open() |
| 1094 | drflac_close() |
| 1095 | */ |
| 1096 | DRFLAC_API drflac* drflac_open_file(const char* pFileName, const drflac_allocation_callbacks* pAllocationCallbacks); |
| 1097 | DRFLAC_API drflac* drflac_open_file_w(const wchar_t* pFileName, const drflac_allocation_callbacks* pAllocationCallbacks); |
| 1098 | |
| 1099 | /* |
| 1100 | Opens a FLAC decoder from the file at the given path and notifies the caller of the metadata chunks (album art, etc.) |
| 1101 | |
| 1102 | |
| 1103 | Parameters |
| 1104 | ---------- |
| 1105 | pFileName (in) |
| 1106 | The path of the file to open, either absolute or relative to the current directory. |
| 1107 | |
| 1108 | pAllocationCallbacks (in, optional) |
| 1109 | A pointer to application defined callbacks for managing memory allocations. |
| 1110 | |
| 1111 | onMeta (in) |
| 1112 | The callback to fire for each metadata block. |
| 1113 | |
| 1114 | pUserData (in) |
| 1115 | A pointer to the user data to pass to the metadata callback. |
| 1116 | |
| 1117 | pAllocationCallbacks (in) |
| 1118 | A pointer to application defined callbacks for managing memory allocations. |
| 1119 | |
| 1120 | |
| 1121 | Remarks |
| 1122 | ------- |
| 1123 | Look at the documentation for drflac_open_with_metadata() for more information on how metadata is handled. |
| 1124 | |
| 1125 | |
| 1126 | See Also |
| 1127 | -------- |
| 1128 | drflac_open_with_metadata() |
| 1129 | drflac_open() |
| 1130 | drflac_close() |
| 1131 | */ |
| 1132 | DRFLAC_API drflac* drflac_open_file_with_metadata(const char* pFileName, drflac_meta_proc onMeta, void* pUserData, const drflac_allocation_callbacks* pAllocationCallbacks); |
| 1133 | DRFLAC_API drflac* drflac_open_file_with_metadata_w(const wchar_t* pFileName, drflac_meta_proc onMeta, void* pUserData, const drflac_allocation_callbacks* pAllocationCallbacks); |
| 1134 | #endif |
| 1135 | |
| 1136 | /* |
| 1137 | Opens a FLAC decoder from a pre-allocated block of memory |
| 1138 | |
| 1139 | |
| 1140 | Parameters |
| 1141 | ---------- |
| 1142 | pData (in) |
| 1143 | A pointer to the raw encoded FLAC data. |
| 1144 | |
| 1145 | dataSize (in) |
| 1146 | The size in bytes of `data`. |
| 1147 | |
| 1148 | pAllocationCallbacks (in) |
| 1149 | A pointer to application defined callbacks for managing memory allocations. |
| 1150 | |
| 1151 | |
| 1152 | Return Value |
| 1153 | ------------ |
| 1154 | A pointer to an object representing the decoder. |
| 1155 | |
| 1156 | |
| 1157 | Remarks |
| 1158 | ------- |
| 1159 | This does not create a copy of the data. It is up to the application to ensure the buffer remains valid for the lifetime of the decoder. |
| 1160 | |
| 1161 | |
| 1162 | See Also |
| 1163 | -------- |
| 1164 | drflac_open() |
| 1165 | drflac_close() |
| 1166 | */ |
| 1167 | DRFLAC_API drflac* drflac_open_memory(const void* pData, size_t dataSize, const drflac_allocation_callbacks* pAllocationCallbacks); |
| 1168 | |
| 1169 | /* |
| 1170 | Opens a FLAC decoder from a pre-allocated block of memory and notifies the caller of the metadata chunks (album art, etc.) |
| 1171 | |
| 1172 | |
| 1173 | Parameters |
| 1174 | ---------- |
| 1175 | pData (in) |
| 1176 | A pointer to the raw encoded FLAC data. |
| 1177 | |
| 1178 | dataSize (in) |
| 1179 | The size in bytes of `data`. |
| 1180 | |
| 1181 | onMeta (in) |
| 1182 | The callback to fire for each metadata block. |
| 1183 | |
| 1184 | pUserData (in) |
| 1185 | A pointer to the user data to pass to the metadata callback. |
| 1186 | |
| 1187 | pAllocationCallbacks (in) |
| 1188 | A pointer to application defined callbacks for managing memory allocations. |
| 1189 | |
| 1190 | |
| 1191 | Remarks |
| 1192 | ------- |
| 1193 | Look at the documentation for drflac_open_with_metadata() for more information on how metadata is handled. |
| 1194 | |
| 1195 | |
| 1196 | See Also |
| 1197 | ------- |
| 1198 | drflac_open_with_metadata() |
| 1199 | drflac_open() |
| 1200 | drflac_close() |
| 1201 | */ |
| 1202 | DRFLAC_API drflac* drflac_open_memory_with_metadata(const void* pData, size_t dataSize, drflac_meta_proc onMeta, void* pUserData, const drflac_allocation_callbacks* pAllocationCallbacks); |
| 1203 | |
| 1204 | |
| 1205 | |
| 1206 | /* High Level APIs */ |
| 1207 | |
| 1208 | /* |
| 1209 | Opens a FLAC stream from the given callbacks and fully decodes it in a single operation. The return value is a |
| 1210 | pointer to the sample data as interleaved signed 32-bit PCM. The returned data must be freed with drflac_free(). |
| 1211 | |
| 1212 | You can pass in custom memory allocation callbacks via the pAllocationCallbacks parameter. This can be NULL in which |
| 1213 | case it will use DRFLAC_MALLOC, DRFLAC_REALLOC and DRFLAC_FREE. |
| 1214 | |
| 1215 | Sometimes a FLAC file won't keep track of the total sample count. In this situation the function will continuously |
| 1216 | read samples into a dynamically sized buffer on the heap until no samples are left. |
| 1217 | |
| 1218 | Do not call this function on a broadcast type of stream (like internet radio streams and whatnot). |
| 1219 | */ |
| 1220 | DRFLAC_API drflac_int32* drflac_open_and_read_pcm_frames_s32(drflac_read_proc onRead, drflac_seek_proc onSeek, void* pUserData, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalPCMFrameCount, const drflac_allocation_callbacks* pAllocationCallbacks); |
| 1221 | |
| 1222 | /* Same as drflac_open_and_read_pcm_frames_s32(), except returns signed 16-bit integer samples. */ |
| 1223 | DRFLAC_API drflac_int16* drflac_open_and_read_pcm_frames_s16(drflac_read_proc onRead, drflac_seek_proc onSeek, void* pUserData, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalPCMFrameCount, const drflac_allocation_callbacks* pAllocationCallbacks); |
| 1224 | |
| 1225 | /* Same as drflac_open_and_read_pcm_frames_s32(), except returns 32-bit floating-point samples. */ |
| 1226 | DRFLAC_API float* drflac_open_and_read_pcm_frames_f32(drflac_read_proc onRead, drflac_seek_proc onSeek, void* pUserData, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalPCMFrameCount, const drflac_allocation_callbacks* pAllocationCallbacks); |
| 1227 | |
| 1228 | #ifndef DR_FLAC_NO_STDIO |
| 1229 | /* Same as drflac_open_and_read_pcm_frames_s32() except opens the decoder from a file. */ |
| 1230 | DRFLAC_API drflac_int32* drflac_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalPCMFrameCount, const drflac_allocation_callbacks* pAllocationCallbacks); |
| 1231 | |
| 1232 | /* Same as drflac_open_file_and_read_pcm_frames_s32(), except returns signed 16-bit integer samples. */ |
| 1233 | DRFLAC_API drflac_int16* drflac_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalPCMFrameCount, const drflac_allocation_callbacks* pAllocationCallbacks); |
| 1234 | |
| 1235 | /* Same as drflac_open_file_and_read_pcm_frames_s32(), except returns 32-bit floating-point samples. */ |
| 1236 | DRFLAC_API float* drflac_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalPCMFrameCount, const drflac_allocation_callbacks* pAllocationCallbacks); |
| 1237 | #endif |
| 1238 | |
| 1239 | /* Same as drflac_open_and_read_pcm_frames_s32() except opens the decoder from a block of memory. */ |
| 1240 | DRFLAC_API drflac_int32* drflac_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalPCMFrameCount, const drflac_allocation_callbacks* pAllocationCallbacks); |
| 1241 | |
| 1242 | /* Same as drflac_open_memory_and_read_pcm_frames_s32(), except returns signed 16-bit integer samples. */ |
| 1243 | DRFLAC_API drflac_int16* drflac_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalPCMFrameCount, const drflac_allocation_callbacks* pAllocationCallbacks); |
| 1244 | |
| 1245 | /* Same as drflac_open_memory_and_read_pcm_frames_s32(), except returns 32-bit floating-point samples. */ |
| 1246 | DRFLAC_API float* drflac_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalPCMFrameCount, const drflac_allocation_callbacks* pAllocationCallbacks); |
| 1247 | |
| 1248 | /* |
| 1249 | Frees memory that was allocated internally by dr_flac. |
| 1250 | |
| 1251 | Set pAllocationCallbacks to the same object that was passed to drflac_open_*_and_read_pcm_frames_*(). If you originally passed in NULL, pass in NULL for this. |
| 1252 | */ |
| 1253 | DRFLAC_API void drflac_free(void* p, const drflac_allocation_callbacks* pAllocationCallbacks); |
| 1254 | |
| 1255 | |
| 1256 | /* Structure representing an iterator for vorbis comments in a VORBIS_COMMENT metadata block. */ |
| 1257 | typedef struct |
| 1258 | { |
| 1259 | drflac_uint32 countRemaining; |
| 1260 | const char* pRunningData; |
| 1261 | } drflac_vorbis_comment_iterator; |
| 1262 | |
| 1263 | /* |
| 1264 | Initializes a vorbis comment iterator. This can be used for iterating over the vorbis comments in a VORBIS_COMMENT |
| 1265 | metadata block. |
| 1266 | */ |
| 1267 | DRFLAC_API void drflac_init_vorbis_comment_iterator(drflac_vorbis_comment_iterator* pIter, drflac_uint32 commentCount, const void* pComments); |
| 1268 | |
| 1269 | /* |
| 1270 | Goes to the next vorbis comment in the given iterator. If null is returned it means there are no more comments. The |
| 1271 | returned string is NOT null terminated. |
| 1272 | */ |
| 1273 | DRFLAC_API const char* drflac_next_vorbis_comment(drflac_vorbis_comment_iterator* pIter, drflac_uint32* pCommentLengthOut); |
| 1274 | |
| 1275 | |
| 1276 | /* Structure representing an iterator for cuesheet tracks in a CUESHEET metadata block. */ |
| 1277 | typedef struct |
| 1278 | { |
| 1279 | drflac_uint32 countRemaining; |
| 1280 | const char* pRunningData; |
| 1281 | } drflac_cuesheet_track_iterator; |
| 1282 | |
| 1283 | /* Packing is important on this structure because we map this directly to the raw data within the CUESHEET metadata block. */ |
| 1284 | #pragma pack(4) |
| 1285 | typedef struct |
| 1286 | { |
| 1287 | drflac_uint64 offset; |
| 1288 | drflac_uint8 index; |
| 1289 | drflac_uint8 reserved[3]; |
| 1290 | } drflac_cuesheet_track_index; |
| 1291 | #pragma pack() |
| 1292 | |
| 1293 | typedef struct |
| 1294 | { |
| 1295 | drflac_uint64 offset; |
| 1296 | drflac_uint8 trackNumber; |
| 1297 | char ISRC[12]; |
| 1298 | drflac_bool8 isAudio; |
| 1299 | drflac_bool8 preEmphasis; |
| 1300 | drflac_uint8 indexCount; |
| 1301 | const drflac_cuesheet_track_index* pIndexPoints; |
| 1302 | } drflac_cuesheet_track; |
| 1303 | |
| 1304 | /* |
| 1305 | Initializes a cuesheet track iterator. This can be used for iterating over the cuesheet tracks in a CUESHEET metadata |
| 1306 | block. |
| 1307 | */ |
| 1308 | DRFLAC_API void drflac_init_cuesheet_track_iterator(drflac_cuesheet_track_iterator* pIter, drflac_uint32 trackCount, const void* pTrackData); |
| 1309 | |
| 1310 | /* Goes to the next cuesheet track in the given iterator. If DRFLAC_FALSE is returned it means there are no more comments. */ |
| 1311 | DRFLAC_API drflac_bool32 drflac_next_cuesheet_track(drflac_cuesheet_track_iterator* pIter, drflac_cuesheet_track* pCuesheetTrack); |
| 1312 | |
| 1313 | |
| 1314 | #ifdef __cplusplus |
| 1315 | } |
| 1316 | #endif |
| 1317 | #endif /* dr_flac_h */ |
| 1318 | |
| 1319 | |
| 1320 | /************************************************************************************************************************************************************ |
| 1321 | ************************************************************************************************************************************************************ |
| 1322 | |
| 1323 | IMPLEMENTATION |
| 1324 | |
| 1325 | ************************************************************************************************************************************************************ |
| 1326 | ************************************************************************************************************************************************************/ |
| 1327 | #if defined(DR_FLAC_IMPLEMENTATION) || defined(DRFLAC_IMPLEMENTATION) |
| 1328 | #ifndef dr_flac_c |
| 1329 | #define dr_flac_c |
| 1330 | |
| 1331 | /* Disable some annoying warnings. */ |
| 1332 | #if defined(__clang__) || (defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6))) |
| 1333 | #pragma GCC diagnostic push |
| 1334 | #if __GNUC__ >= 7 |
| 1335 | #pragma GCC diagnostic ignored "-Wimplicit-fallthrough" |
| 1336 | #endif |
| 1337 | #endif |
| 1338 | |
| 1339 | #ifdef __linux__ |
| 1340 | #ifndef _BSD_SOURCE |
| 1341 | #define _BSD_SOURCE |
| 1342 | #endif |
| 1343 | #ifndef _DEFAULT_SOURCE |
| 1344 | #define _DEFAULT_SOURCE |
| 1345 | #endif |
| 1346 | #ifndef __USE_BSD |
| 1347 | #define __USE_BSD |
| 1348 | #endif |
| 1349 | #include <endian.h> |
| 1350 | #endif |
| 1351 | |
| 1352 | #include <stdlib.h> |
| 1353 | #include <string.h> |
| 1354 | |
| 1355 | #ifdef _MSC_VER |
| 1356 | #define DRFLAC_INLINE __forceinline |
| 1357 | #elif defined(__GNUC__) |
| 1358 | /* |
| 1359 | I've had a bug report where GCC is emitting warnings about functions possibly not being inlineable. This warning happens when |
| 1360 | the __attribute__((always_inline)) attribute is defined without an "inline" statement. I think therefore there must be some |
| 1361 | case where "__inline__" is not always defined, thus the compiler emitting these warnings. When using -std=c89 or -ansi on the |
| 1362 | command line, we cannot use the "inline" keyword and instead need to use "__inline__". In an attempt to work around this issue |
| 1363 | I am using "__inline__" only when we're compiling in strict ANSI mode. |
| 1364 | */ |
| 1365 | #if defined(__STRICT_ANSI__) |
| 1366 | #define DRFLAC_INLINE __inline__ __attribute__((always_inline)) |
| 1367 | #else |
| 1368 | #define DRFLAC_INLINE inline __attribute__((always_inline)) |
| 1369 | #endif |
| 1370 | #elif defined(__WATCOMC__) |
| 1371 | #define DRFLAC_INLINE __inline |
| 1372 | #else |
| 1373 | #define DRFLAC_INLINE |
| 1374 | #endif |
| 1375 | |
| 1376 | /* CPU architecture. */ |
| 1377 | #if defined(__x86_64__) || defined(_M_X64) |
| 1378 | #define DRFLAC_X64 |
| 1379 | #elif defined(__i386) || defined(_M_IX86) |
| 1380 | #define DRFLAC_X86 |
| 1381 | #elif defined(__arm__) || defined(_M_ARM) || defined(_M_ARM64) |
| 1382 | #define DRFLAC_ARM |
| 1383 | #endif |
| 1384 | |
| 1385 | /* |
| 1386 | Intrinsics Support |
| 1387 | |
| 1388 | There's a bug in GCC 4.2.x which results in an incorrect compilation error when using _mm_slli_epi32() where it complains with |
| 1389 | |
| 1390 | "error: shift must be an immediate" |
| 1391 | |
| 1392 | Unfortuantely dr_flac depends on this for a few things so we're just going to disable SSE on GCC 4.2 and below. |
| 1393 | */ |
| 1394 | #if !defined(DR_FLAC_NO_SIMD) |
| 1395 | #if defined(DRFLAC_X64) || defined(DRFLAC_X86) |
| 1396 | #if defined(_MSC_VER) && !defined(__clang__) |
| 1397 | /* MSVC. */ |
| 1398 | #if _MSC_VER >= 1400 && !defined(DRFLAC_NO_SSE2) /* 2005 */ |
| 1399 | #define DRFLAC_SUPPORT_SSE2 |
| 1400 | #endif |
| 1401 | #if _MSC_VER >= 1600 && !defined(DRFLAC_NO_SSE41) /* 2010 */ |
| 1402 | #define DRFLAC_SUPPORT_SSE41 |
| 1403 | #endif |
| 1404 | #elif defined(__clang__) || (defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3))) |
| 1405 | /* Assume GNUC-style. */ |
| 1406 | #if defined(__SSE2__) && !defined(DRFLAC_NO_SSE2) |
| 1407 | #define DRFLAC_SUPPORT_SSE2 |
| 1408 | #endif |
| 1409 | #if defined(__SSE4_1__) && !defined(DRFLAC_NO_SSE41) |
| 1410 | #define DRFLAC_SUPPORT_SSE41 |
| 1411 | #endif |
| 1412 | #endif |
| 1413 | |
| 1414 | /* If at this point we still haven't determined compiler support for the intrinsics just fall back to __has_include. */ |
| 1415 | #if !defined(__GNUC__) && !defined(__clang__) && defined(__has_include) |
| 1416 | #if !defined(DRFLAC_SUPPORT_SSE2) && !defined(DRFLAC_NO_SSE2) && __has_include(<emmintrin.h>) |
| 1417 | #define DRFLAC_SUPPORT_SSE2 |
| 1418 | #endif |
| 1419 | #if !defined(DRFLAC_SUPPORT_SSE41) && !defined(DRFLAC_NO_SSE41) && __has_include(<smmintrin.h>) |
| 1420 | #define DRFLAC_SUPPORT_SSE41 |
| 1421 | #endif |
| 1422 | #endif |
| 1423 | |
| 1424 | #if defined(DRFLAC_SUPPORT_SSE41) |
| 1425 | #include <smmintrin.h> |
| 1426 | #elif defined(DRFLAC_SUPPORT_SSE2) |
| 1427 | #include <emmintrin.h> |
| 1428 | #endif |
| 1429 | #endif |
| 1430 | |
| 1431 | #if defined(DRFLAC_ARM) |
| 1432 | #if !defined(DRFLAC_NO_NEON) && (defined(__ARM_NEON) || defined(__aarch64__) || defined(_M_ARM64)) |
| 1433 | #define DRFLAC_SUPPORT_NEON |
| 1434 | #endif |
| 1435 | |
| 1436 | /* Fall back to looking for the #include file. */ |
| 1437 | #if !defined(__GNUC__) && !defined(__clang__) && defined(__has_include) |
| 1438 | #if !defined(DRFLAC_SUPPORT_NEON) && !defined(DRFLAC_NO_NEON) && __has_include(<arm_neon.h>) |
| 1439 | #define DRFLAC_SUPPORT_NEON |
| 1440 | #endif |
| 1441 | #endif |
| 1442 | |
| 1443 | #if defined(DRFLAC_SUPPORT_NEON) |
| 1444 | #include <arm_neon.h> |
| 1445 | #endif |
| 1446 | #endif |
| 1447 | #endif |
| 1448 | |
| 1449 | /* Compile-time CPU feature support. */ |
| 1450 | #if !defined(DR_FLAC_NO_SIMD) && (defined(DRFLAC_X86) || defined(DRFLAC_X64)) |
| 1451 | #if defined(_MSC_VER) && !defined(__clang__) |
| 1452 | #if _MSC_VER >= 1400 |
| 1453 | #include <intrin.h> |
| 1454 | static void drflac__cpuid(int info[4], int fid) |
| 1455 | { |
| 1456 | __cpuid(info, fid); |
| 1457 | } |
| 1458 | #else |
| 1459 | #define DRFLAC_NO_CPUID |
| 1460 | #endif |
| 1461 | #else |
| 1462 | #if defined(__GNUC__) || defined(__clang__) |
| 1463 | static void drflac__cpuid(int info[4], int fid) |
| 1464 | { |
| 1465 | /* |
| 1466 | It looks like the -fPIC option uses the ebx register which GCC complains about. We can work around this by just using a different register, the |
| 1467 | specific register of which I'm letting the compiler decide on. The "k" prefix is used to specify a 32-bit register. The {...} syntax is for |
| 1468 | supporting different assembly dialects. |
| 1469 | |
| 1470 | What's basically happening is that we're saving and restoring the ebx register manually. |
| 1471 | */ |
| 1472 | #if defined(DRFLAC_X86) && defined(__PIC__) |
| 1473 | __asm__ __volatile__ ( |
| 1474 | "xchg{l} {%%}ebx, %k1;" |
| 1475 | "cpuid;" |
| 1476 | "xchg{l} {%%}ebx, %k1;" |
| 1477 | : "=a"(info[0]), "=&r"(info[1]), "=c"(info[2]), "=d"(info[3]) : "a"(fid), "c"(0) |
| 1478 | ); |
| 1479 | #else |
| 1480 | __asm__ __volatile__ ( |
| 1481 | "cpuid" : "=a"(info[0]), "=b"(info[1]), "=c"(info[2]), "=d"(info[3]) : "a"(fid), "c"(0) |
| 1482 | ); |
| 1483 | #endif |
| 1484 | } |
| 1485 | #else |
| 1486 | #define DRFLAC_NO_CPUID |
| 1487 | #endif |
| 1488 | #endif |
| 1489 | #else |
| 1490 | #define DRFLAC_NO_CPUID |
| 1491 | #endif |
| 1492 | |
| 1493 | static DRFLAC_INLINE drflac_bool32 drflac_has_sse2(void) |
| 1494 | { |
| 1495 | #if defined(DRFLAC_SUPPORT_SSE2) |
| 1496 | #if (defined(DRFLAC_X64) || defined(DRFLAC_X86)) && !defined(DRFLAC_NO_SSE2) |
| 1497 | #if defined(DRFLAC_X64) |
| 1498 | return DRFLAC_TRUE; /* 64-bit targets always support SSE2. */ |
| 1499 | #elif (defined(_M_IX86_FP) && _M_IX86_FP == 2) || defined(__SSE2__) |
| 1500 | return DRFLAC_TRUE; /* If the compiler is allowed to freely generate SSE2 code we can assume support. */ |
| 1501 | #else |
| 1502 | #if defined(DRFLAC_NO_CPUID) |
| 1503 | return DRFLAC_FALSE; |
| 1504 | #else |
| 1505 | int info[4]; |
| 1506 | drflac__cpuid(info, 1); |
| 1507 | return (info[3] & (1 << 26)) != 0; |
| 1508 | #endif |
| 1509 | #endif |
| 1510 | #else |
| 1511 | return DRFLAC_FALSE; /* SSE2 is only supported on x86 and x64 architectures. */ |
| 1512 | #endif |
| 1513 | #else |
| 1514 | return DRFLAC_FALSE; /* No compiler support. */ |
| 1515 | #endif |
| 1516 | } |
| 1517 | |
| 1518 | static DRFLAC_INLINE drflac_bool32 drflac_has_sse41(void) |
| 1519 | { |
| 1520 | #if defined(DRFLAC_SUPPORT_SSE41) |
| 1521 | #if (defined(DRFLAC_X64) || defined(DRFLAC_X86)) && !defined(DRFLAC_NO_SSE41) |
| 1522 | #if defined(DRFLAC_X64) |
| 1523 | return DRFLAC_TRUE; /* 64-bit targets always support SSE4.1. */ |
| 1524 | #elif (defined(_M_IX86_FP) && _M_IX86_FP == 2) || defined(__SSE4_1__) |
| 1525 | return DRFLAC_TRUE; /* If the compiler is allowed to freely generate SSE41 code we can assume support. */ |
| 1526 | #else |
| 1527 | #if defined(DRFLAC_NO_CPUID) |
| 1528 | return DRFLAC_FALSE; |
| 1529 | #else |
| 1530 | int info[4]; |
| 1531 | drflac__cpuid(info, 1); |
| 1532 | return (info[2] & (1 << 19)) != 0; |
| 1533 | #endif |
| 1534 | #endif |
| 1535 | #else |
| 1536 | return DRFLAC_FALSE; /* SSE41 is only supported on x86 and x64 architectures. */ |
| 1537 | #endif |
| 1538 | #else |
| 1539 | return DRFLAC_FALSE; /* No compiler support. */ |
| 1540 | #endif |
| 1541 | } |
| 1542 | |
| 1543 | |
| 1544 | #if defined(_MSC_VER) && _MSC_VER >= 1500 && (defined(DRFLAC_X86) || defined(DRFLAC_X64)) && !defined(__clang__) |
| 1545 | #define DRFLAC_HAS_LZCNT_INTRINSIC |
| 1546 | #elif (defined(__GNUC__) && ((__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 7))) |
| 1547 | #define DRFLAC_HAS_LZCNT_INTRINSIC |
| 1548 | #elif defined(__clang__) |
| 1549 | #if defined(__has_builtin) |
| 1550 | #if __has_builtin(__builtin_clzll) || __has_builtin(__builtin_clzl) |
| 1551 | #define DRFLAC_HAS_LZCNT_INTRINSIC |
| 1552 | #endif |
| 1553 | #endif |
| 1554 | #endif |
| 1555 | |
| 1556 | #if defined(_MSC_VER) && _MSC_VER >= 1400 && !defined(__clang__) |
| 1557 | #define DRFLAC_HAS_BYTESWAP16_INTRINSIC |
| 1558 | #define DRFLAC_HAS_BYTESWAP32_INTRINSIC |
| 1559 | #define DRFLAC_HAS_BYTESWAP64_INTRINSIC |
| 1560 | #elif defined(__clang__) |
| 1561 | #if defined(__has_builtin) |
| 1562 | #if __has_builtin(__builtin_bswap16) |
| 1563 | #define DRFLAC_HAS_BYTESWAP16_INTRINSIC |
| 1564 | #endif |
| 1565 | #if __has_builtin(__builtin_bswap32) |
| 1566 | #define DRFLAC_HAS_BYTESWAP32_INTRINSIC |
| 1567 | #endif |
| 1568 | #if __has_builtin(__builtin_bswap64) |
| 1569 | #define DRFLAC_HAS_BYTESWAP64_INTRINSIC |
| 1570 | #endif |
| 1571 | #endif |
| 1572 | #elif defined(__GNUC__) |
| 1573 | #if ((__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)) |
| 1574 | #define DRFLAC_HAS_BYTESWAP32_INTRINSIC |
| 1575 | #define DRFLAC_HAS_BYTESWAP64_INTRINSIC |
| 1576 | #endif |
| 1577 | #if ((__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8)) |
| 1578 | #define DRFLAC_HAS_BYTESWAP16_INTRINSIC |
| 1579 | #endif |
| 1580 | #endif |
| 1581 | |
| 1582 | |
| 1583 | /* Standard library stuff. */ |
| 1584 | #ifndef DRFLAC_ASSERT |
| 1585 | #include <assert.h> |
| 1586 | #define DRFLAC_ASSERT(expression) assert(expression) |
| 1587 | #endif |
| 1588 | #ifndef DRFLAC_MALLOC |
| 1589 | #define DRFLAC_MALLOC(sz) malloc((sz)) |
| 1590 | #endif |
| 1591 | #ifndef DRFLAC_REALLOC |
| 1592 | #define DRFLAC_REALLOC(p, sz) realloc((p), (sz)) |
| 1593 | #endif |
| 1594 | #ifndef DRFLAC_FREE |
| 1595 | #define DRFLAC_FREE(p) free((p)) |
| 1596 | #endif |
| 1597 | #ifndef DRFLAC_COPY_MEMORY |
| 1598 | #define DRFLAC_COPY_MEMORY(dst, src, sz) memcpy((dst), (src), (sz)) |
| 1599 | #endif |
| 1600 | #ifndef DRFLAC_ZERO_MEMORY |
| 1601 | #define DRFLAC_ZERO_MEMORY(p, sz) memset((p), 0, (sz)) |
| 1602 | #endif |
| 1603 | #ifndef DRFLAC_ZERO_OBJECT |
| 1604 | #define DRFLAC_ZERO_OBJECT(p) DRFLAC_ZERO_MEMORY((p), sizeof(*(p))) |
| 1605 | #endif |
| 1606 | |
| 1607 | #define DRFLAC_MAX_SIMD_VECTOR_SIZE 64 /* 64 for AVX-512 in the future. */ |
| 1608 | |
| 1609 | typedef drflac_int32 drflac_result; |
| 1610 | #define DRFLAC_SUCCESS 0 |
| 1611 | #define DRFLAC_ERROR -1 /* A generic error. */ |
| 1612 | #define DRFLAC_INVALID_ARGS -2 |
| 1613 | #define DRFLAC_INVALID_OPERATION -3 |
| 1614 | #define DRFLAC_OUT_OF_MEMORY -4 |
| 1615 | #define DRFLAC_OUT_OF_RANGE -5 |
| 1616 | #define DRFLAC_ACCESS_DENIED -6 |
| 1617 | #define DRFLAC_DOES_NOT_EXIST -7 |
| 1618 | #define DRFLAC_ALREADY_EXISTS -8 |
| 1619 | #define DRFLAC_TOO_MANY_OPEN_FILES -9 |
| 1620 | #define DRFLAC_INVALID_FILE -10 |
| 1621 | #define DRFLAC_TOO_BIG -11 |
| 1622 | #define DRFLAC_PATH_TOO_LONG -12 |
| 1623 | #define DRFLAC_NAME_TOO_LONG -13 |
| 1624 | #define DRFLAC_NOT_DIRECTORY -14 |
| 1625 | #define DRFLAC_IS_DIRECTORY -15 |
| 1626 | #define DRFLAC_DIRECTORY_NOT_EMPTY -16 |
| 1627 | #define DRFLAC_END_OF_FILE -17 |
| 1628 | #define DRFLAC_NO_SPACE -18 |
| 1629 | #define DRFLAC_BUSY -19 |
| 1630 | #define DRFLAC_IO_ERROR -20 |
| 1631 | #define DRFLAC_INTERRUPT -21 |
| 1632 | #define DRFLAC_UNAVAILABLE -22 |
| 1633 | #define DRFLAC_ALREADY_IN_USE -23 |
| 1634 | #define DRFLAC_BAD_ADDRESS -24 |
| 1635 | #define DRFLAC_BAD_SEEK -25 |
| 1636 | #define DRFLAC_BAD_PIPE -26 |
| 1637 | #define DRFLAC_DEADLOCK -27 |
| 1638 | #define DRFLAC_TOO_MANY_LINKS -28 |
| 1639 | #define DRFLAC_NOT_IMPLEMENTED -29 |
| 1640 | #define DRFLAC_NO_MESSAGE -30 |
| 1641 | #define DRFLAC_BAD_MESSAGE -31 |
| 1642 | #define DRFLAC_NO_DATA_AVAILABLE -32 |
| 1643 | #define DRFLAC_INVALID_DATA -33 |
| 1644 | #define DRFLAC_TIMEOUT -34 |
| 1645 | #define DRFLAC_NO_NETWORK -35 |
| 1646 | #define DRFLAC_NOT_UNIQUE -36 |
| 1647 | #define DRFLAC_NOT_SOCKET -37 |
| 1648 | #define DRFLAC_NO_ADDRESS -38 |
| 1649 | #define DRFLAC_BAD_PROTOCOL -39 |
| 1650 | #define DRFLAC_PROTOCOL_UNAVAILABLE -40 |
| 1651 | #define DRFLAC_PROTOCOL_NOT_SUPPORTED -41 |
| 1652 | #define DRFLAC_PROTOCOL_FAMILY_NOT_SUPPORTED -42 |
| 1653 | #define DRFLAC_ADDRESS_FAMILY_NOT_SUPPORTED -43 |
| 1654 | #define DRFLAC_SOCKET_NOT_SUPPORTED -44 |
| 1655 | #define DRFLAC_CONNECTION_RESET -45 |
| 1656 | #define DRFLAC_ALREADY_CONNECTED -46 |
| 1657 | #define DRFLAC_NOT_CONNECTED -47 |
| 1658 | #define DRFLAC_CONNECTION_REFUSED -48 |
| 1659 | #define DRFLAC_NO_HOST -49 |
| 1660 | #define DRFLAC_IN_PROGRESS -50 |
| 1661 | #define DRFLAC_CANCELLED -51 |
| 1662 | #define DRFLAC_MEMORY_ALREADY_MAPPED -52 |
| 1663 | #define DRFLAC_AT_END -53 |
| 1664 | #define DRFLAC_CRC_MISMATCH -128 |
| 1665 | |
| 1666 | #define DRFLAC_SUBFRAME_CONSTANT 0 |
| 1667 | #define DRFLAC_SUBFRAME_VERBATIM 1 |
| 1668 | #define DRFLAC_SUBFRAME_FIXED 8 |
| 1669 | #define DRFLAC_SUBFRAME_LPC 32 |
| 1670 | #define DRFLAC_SUBFRAME_RESERVED 255 |
| 1671 | |
| 1672 | #define DRFLAC_RESIDUAL_CODING_METHOD_PARTITIONED_RICE 0 |
| 1673 | #define DRFLAC_RESIDUAL_CODING_METHOD_PARTITIONED_RICE2 1 |
| 1674 | |
| 1675 | #define DRFLAC_CHANNEL_ASSIGNMENT_INDEPENDENT 0 |
| 1676 | #define DRFLAC_CHANNEL_ASSIGNMENT_LEFT_SIDE 8 |
| 1677 | #define DRFLAC_CHANNEL_ASSIGNMENT_RIGHT_SIDE 9 |
| 1678 | #define DRFLAC_CHANNEL_ASSIGNMENT_MID_SIDE 10 |
| 1679 | |
| 1680 | #define drflac_align(x, a) ((((x) + (a) - 1) / (a)) * (a)) |
| 1681 | |
| 1682 | |
| 1683 | DRFLAC_API void drflac_version(drflac_uint32* pMajor, drflac_uint32* pMinor, drflac_uint32* pRevision) |
| 1684 | { |
| 1685 | if (pMajor) { |
| 1686 | *pMajor = DRFLAC_VERSION_MAJOR; |
| 1687 | } |
| 1688 | |
| 1689 | if (pMinor) { |
| 1690 | *pMinor = DRFLAC_VERSION_MINOR; |
| 1691 | } |
| 1692 | |
| 1693 | if (pRevision) { |
| 1694 | *pRevision = DRFLAC_VERSION_REVISION; |
| 1695 | } |
| 1696 | } |
| 1697 | |
| 1698 | DRFLAC_API const char* drflac_version_string(void) |
| 1699 | { |
| 1700 | return DRFLAC_VERSION_STRING; |
| 1701 | } |
| 1702 | |
| 1703 | |
| 1704 | /* CPU caps. */ |
| 1705 | #if defined(__has_feature) |
| 1706 | #if __has_feature(thread_sanitizer) |
| 1707 | #define DRFLAC_NO_THREAD_SANITIZE __attribute__((no_sanitize("thread"))) |
| 1708 | #else |
| 1709 | #define DRFLAC_NO_THREAD_SANITIZE |
| 1710 | #endif |
| 1711 | #else |
| 1712 | #define DRFLAC_NO_THREAD_SANITIZE |
| 1713 | #endif |
| 1714 | |
| 1715 | #if defined(DRFLAC_HAS_LZCNT_INTRINSIC) |
| 1716 | static drflac_bool32 drflac__gIsLZCNTSupported = DRFLAC_FALSE; |
| 1717 | #endif |
| 1718 | |
| 1719 | #ifndef DRFLAC_NO_CPUID |
| 1720 | static drflac_bool32 drflac__gIsSSE2Supported = DRFLAC_FALSE; |
| 1721 | static drflac_bool32 drflac__gIsSSE41Supported = DRFLAC_FALSE; |
| 1722 | |
| 1723 | /* |
| 1724 | I've had a bug report that Clang's ThreadSanitizer presents a warning in this function. Having reviewed this, this does |
| 1725 | actually make sense. However, since CPU caps should never differ for a running process, I don't think the trade off of |
| 1726 | complicating internal API's by passing around CPU caps versus just disabling the warnings is worthwhile. I'm therefore |
| 1727 | just going to disable these warnings. This is disabled via the DRFLAC_NO_THREAD_SANITIZE attribute. |
| 1728 | */ |
| 1729 | DRFLAC_NO_THREAD_SANITIZE static void drflac__init_cpu_caps(void) |
| 1730 | { |
| 1731 | static drflac_bool32 isCPUCapsInitialized = DRFLAC_FALSE; |
| 1732 | |
| 1733 | if (!isCPUCapsInitialized) { |
| 1734 | /* LZCNT */ |
| 1735 | #if defined(DRFLAC_HAS_LZCNT_INTRINSIC) |
| 1736 | int info[4] = {0}; |
| 1737 | drflac__cpuid(info, 0x80000001); |
| 1738 | drflac__gIsLZCNTSupported = (info[2] & (1 << 5)) != 0; |
| 1739 | #endif |
| 1740 | |
| 1741 | /* SSE2 */ |
| 1742 | drflac__gIsSSE2Supported = drflac_has_sse2(); |
| 1743 | |
| 1744 | /* SSE4.1 */ |
| 1745 | drflac__gIsSSE41Supported = drflac_has_sse41(); |
| 1746 | |
| 1747 | /* Initialized. */ |
| 1748 | isCPUCapsInitialized = DRFLAC_TRUE; |
| 1749 | } |
| 1750 | } |
| 1751 | #else |
| 1752 | static drflac_bool32 drflac__gIsNEONSupported = DRFLAC_FALSE; |
| 1753 | |
| 1754 | static DRFLAC_INLINE drflac_bool32 drflac__has_neon(void) |
| 1755 | { |
| 1756 | #if defined(DRFLAC_SUPPORT_NEON) |
| 1757 | #if defined(DRFLAC_ARM) && !defined(DRFLAC_NO_NEON) |
| 1758 | #if (defined(__ARM_NEON) || defined(__aarch64__) || defined(_M_ARM64)) |
| 1759 | return DRFLAC_TRUE; /* If the compiler is allowed to freely generate NEON code we can assume support. */ |
| 1760 | #else |
| 1761 | /* TODO: Runtime check. */ |
| 1762 | return DRFLAC_FALSE; |
| 1763 | #endif |
| 1764 | #else |
| 1765 | return DRFLAC_FALSE; /* NEON is only supported on ARM architectures. */ |
| 1766 | #endif |
| 1767 | #else |
| 1768 | return DRFLAC_FALSE; /* No compiler support. */ |
| 1769 | #endif |
| 1770 | } |
| 1771 | |
| 1772 | DRFLAC_NO_THREAD_SANITIZE static void drflac__init_cpu_caps(void) |
| 1773 | { |
| 1774 | drflac__gIsNEONSupported = drflac__has_neon(); |
| 1775 | |
| 1776 | #if defined(DRFLAC_HAS_LZCNT_INTRINSIC) && defined(DRFLAC_ARM) && (defined(__ARM_ARCH) && __ARM_ARCH >= 5) |
| 1777 | drflac__gIsLZCNTSupported = DRFLAC_TRUE; |
| 1778 | #endif |
| 1779 | } |
| 1780 | #endif |
| 1781 | |
| 1782 | |
| 1783 | /* Endian Management */ |
| 1784 | static DRFLAC_INLINE drflac_bool32 drflac__is_little_endian(void) |
| 1785 | { |
| 1786 | #if defined(DRFLAC_X86) || defined(DRFLAC_X64) |
| 1787 | return DRFLAC_TRUE; |
| 1788 | #elif defined(__BYTE_ORDER) && defined(__LITTLE_ENDIAN) && __BYTE_ORDER == __LITTLE_ENDIAN |
| 1789 | return DRFLAC_TRUE; |
| 1790 | #else |
| 1791 | int n = 1; |
| 1792 | return (*(char*)&n) == 1; |
| 1793 | #endif |
| 1794 | } |
| 1795 | |
| 1796 | static DRFLAC_INLINE drflac_uint16 drflac__swap_endian_uint16(drflac_uint16 n) |
| 1797 | { |
| 1798 | #ifdef DRFLAC_HAS_BYTESWAP16_INTRINSIC |
| 1799 | #if defined(_MSC_VER) && !defined(__clang__) |
| 1800 | return _byteswap_ushort(n); |
| 1801 | #elif defined(__GNUC__) || defined(__clang__) |
| 1802 | return __builtin_bswap16(n); |
| 1803 | #else |
| 1804 | #error "This compiler does not support the byte swap intrinsic." |
| 1805 | #endif |
| 1806 | #else |
| 1807 | return ((n & 0xFF00) >> 8) | |
| 1808 | ((n & 0x00FF) << 8); |
| 1809 | #endif |
| 1810 | } |
| 1811 | |
| 1812 | static DRFLAC_INLINE drflac_uint32 drflac__swap_endian_uint32(drflac_uint32 n) |
| 1813 | { |
| 1814 | #ifdef DRFLAC_HAS_BYTESWAP32_INTRINSIC |
| 1815 | #if defined(_MSC_VER) && !defined(__clang__) |
| 1816 | return _byteswap_ulong(n); |
| 1817 | #elif defined(__GNUC__) || defined(__clang__) |
| 1818 | #if defined(DRFLAC_ARM) && (defined(__ARM_ARCH) && __ARM_ARCH >= 6) && !defined(DRFLAC_64BIT) /* <-- 64-bit inline assembly has not been tested, so disabling for now. */ |
| 1819 | /* Inline assembly optimized implementation for ARM. In my testing, GCC does not generate optimized code with __builtin_bswap32(). */ |
| 1820 | drflac_uint32 r; |
| 1821 | __asm__ __volatile__ ( |
| 1822 | #if defined(DRFLAC_64BIT) |
| 1823 | "rev %w[out], %w[in]" : [out]"=r"(r) : [in]"r"(n) /* <-- This is untested. If someone in the community could test this, that would be appreciated! */ |
| 1824 | #else |
| 1825 | "rev %[out], %[in]" : [out]"=r"(r) : [in]"r"(n) |
| 1826 | #endif |
| 1827 | ); |
| 1828 | return r; |
| 1829 | #else |
| 1830 | return __builtin_bswap32(n); |
| 1831 | #endif |
| 1832 | #else |
| 1833 | #error "This compiler does not support the byte swap intrinsic." |
| 1834 | #endif |
| 1835 | #else |
| 1836 | return ((n & 0xFF000000) >> 24) | |
| 1837 | ((n & 0x00FF0000) >> 8) | |
| 1838 | ((n & 0x0000FF00) << 8) | |
| 1839 | ((n & 0x000000FF) << 24); |
| 1840 | #endif |
| 1841 | } |
| 1842 | |
| 1843 | static DRFLAC_INLINE drflac_uint64 drflac__swap_endian_uint64(drflac_uint64 n) |
| 1844 | { |
| 1845 | #ifdef DRFLAC_HAS_BYTESWAP64_INTRINSIC |
| 1846 | #if defined(_MSC_VER) && !defined(__clang__) |
| 1847 | return _byteswap_uint64(n); |
| 1848 | #elif defined(__GNUC__) || defined(__clang__) |
| 1849 | return __builtin_bswap64(n); |
| 1850 | #else |
| 1851 | #error "This compiler does not support the byte swap intrinsic." |
| 1852 | #endif |
| 1853 | #else |
| 1854 | /* Weird "<< 32" bitshift is required for C89 because it doesn't support 64-bit constants. Should be optimized out by a good compiler. */ |
| 1855 | return ((n & ((drflac_uint64)0xFF000000 << 32)) >> 56) | |
| 1856 | ((n & ((drflac_uint64)0x00FF0000 << 32)) >> 40) | |
| 1857 | ((n & ((drflac_uint64)0x0000FF00 << 32)) >> 24) | |
| 1858 | ((n & ((drflac_uint64)0x000000FF << 32)) >> 8) | |
| 1859 | ((n & ((drflac_uint64)0xFF000000 )) << 8) | |
| 1860 | ((n & ((drflac_uint64)0x00FF0000 )) << 24) | |
| 1861 | ((n & ((drflac_uint64)0x0000FF00 )) << 40) | |
| 1862 | ((n & ((drflac_uint64)0x000000FF )) << 56); |
| 1863 | #endif |
| 1864 | } |
| 1865 | |
| 1866 | |
| 1867 | static DRFLAC_INLINE drflac_uint16 drflac__be2host_16(drflac_uint16 n) |
| 1868 | { |
| 1869 | if (drflac__is_little_endian()) { |
| 1870 | return drflac__swap_endian_uint16(n); |
| 1871 | } |
| 1872 | |
| 1873 | return n; |
| 1874 | } |
| 1875 | |
| 1876 | static DRFLAC_INLINE drflac_uint32 drflac__be2host_32(drflac_uint32 n) |
| 1877 | { |
| 1878 | if (drflac__is_little_endian()) { |
| 1879 | return drflac__swap_endian_uint32(n); |
| 1880 | } |
| 1881 | |
| 1882 | return n; |
| 1883 | } |
| 1884 | |
| 1885 | static DRFLAC_INLINE drflac_uint64 drflac__be2host_64(drflac_uint64 n) |
| 1886 | { |
| 1887 | if (drflac__is_little_endian()) { |
| 1888 | return drflac__swap_endian_uint64(n); |
| 1889 | } |
| 1890 | |
| 1891 | return n; |
| 1892 | } |
| 1893 | |
| 1894 | |
| 1895 | static DRFLAC_INLINE drflac_uint32 drflac__le2host_32(drflac_uint32 n) |
| 1896 | { |
| 1897 | if (!drflac__is_little_endian()) { |
| 1898 | return drflac__swap_endian_uint32(n); |
| 1899 | } |
| 1900 | |
| 1901 | return n; |
| 1902 | } |
| 1903 | |
| 1904 | |
| 1905 | static DRFLAC_INLINE drflac_uint32 drflac__unsynchsafe_32(drflac_uint32 n) |
| 1906 | { |
| 1907 | drflac_uint32 result = 0; |
| 1908 | result |= (n & 0x7F000000) >> 3; |
| 1909 | result |= (n & 0x007F0000) >> 2; |
| 1910 | result |= (n & 0x00007F00) >> 1; |
| 1911 | result |= (n & 0x0000007F) >> 0; |
| 1912 | |
| 1913 | return result; |
| 1914 | } |
| 1915 | |
| 1916 | |
| 1917 | |
| 1918 | /* The CRC code below is based on this document: http://zlib.net/crc_v3.txt */ |
| 1919 | static drflac_uint8 drflac__crc8_table[] = { |
| 1920 | 0x00, 0x07, 0x0E, 0x09, 0x1C, 0x1B, 0x12, 0x15, 0x38, 0x3F, 0x36, 0x31, 0x24, 0x23, 0x2A, 0x2D, |
| 1921 | 0x70, 0x77, 0x7E, 0x79, 0x6C, 0x6B, 0x62, 0x65, 0x48, 0x4F, 0x46, 0x41, 0x54, 0x53, 0x5A, 0x5D, |
| 1922 | 0xE0, 0xE7, 0xEE, 0xE9, 0xFC, 0xFB, 0xF2, 0xF5, 0xD8, 0xDF, 0xD6, 0xD1, 0xC4, 0xC3, 0xCA, 0xCD, |
| 1923 | 0x90, 0x97, 0x9E, 0x99, 0x8C, 0x8B, 0x82, 0x85, 0xA8, 0xAF, 0xA6, 0xA1, 0xB4, 0xB3, 0xBA, 0xBD, |
| 1924 | 0xC7, 0xC0, 0xC9, 0xCE, 0xDB, 0xDC, 0xD5, 0xD2, 0xFF, 0xF8, 0xF1, 0xF6, 0xE3, 0xE4, 0xED, 0xEA, |
| 1925 | 0xB7, 0xB0, 0xB9, 0xBE, 0xAB, 0xAC, 0xA5, 0xA2, 0x8F, 0x88, 0x81, 0x86, 0x93, 0x94, 0x9D, 0x9A, |
| 1926 | 0x27, 0x20, 0x29, 0x2E, 0x3B, 0x3C, 0x35, 0x32, 0x1F, 0x18, 0x11, 0x16, 0x03, 0x04, 0x0D, 0x0A, |
| 1927 | 0x57, 0x50, 0x59, 0x5E, 0x4B, 0x4C, 0x45, 0x42, 0x6F, 0x68, 0x61, 0x66, 0x73, 0x74, 0x7D, 0x7A, |
| 1928 | 0x89, 0x8E, 0x87, 0x80, 0x95, 0x92, 0x9B, 0x9C, 0xB1, 0xB6, 0xBF, 0xB8, 0xAD, 0xAA, 0xA3, 0xA4, |
| 1929 | 0xF9, 0xFE, 0xF7, 0xF0, 0xE5, 0xE2, 0xEB, 0xEC, 0xC1, 0xC6, 0xCF, 0xC8, 0xDD, 0xDA, 0xD3, 0xD4, |
| 1930 | 0x69, 0x6E, 0x67, 0x60, 0x75, 0x72, 0x7B, 0x7C, 0x51, 0x56, 0x5F, 0x58, 0x4D, 0x4A, 0x43, 0x44, |
| 1931 | 0x19, 0x1E, 0x17, 0x10, 0x05, 0x02, 0x0B, 0x0C, 0x21, 0x26, 0x2F, 0x28, 0x3D, 0x3A, 0x33, 0x34, |
| 1932 | 0x4E, 0x49, 0x40, 0x47, 0x52, 0x55, 0x5C, 0x5B, 0x76, 0x71, 0x78, 0x7F, 0x6A, 0x6D, 0x64, 0x63, |
| 1933 | 0x3E, 0x39, 0x30, 0x37, 0x22, 0x25, 0x2C, 0x2B, 0x06, 0x01, 0x08, 0x0F, 0x1A, 0x1D, 0x14, 0x13, |
| 1934 | 0xAE, 0xA9, 0xA0, 0xA7, 0xB2, 0xB5, 0xBC, 0xBB, 0x96, 0x91, 0x98, 0x9F, 0x8A, 0x8D, 0x84, 0x83, |
| 1935 | 0xDE, 0xD9, 0xD0, 0xD7, 0xC2, 0xC5, 0xCC, 0xCB, 0xE6, 0xE1, 0xE8, 0xEF, 0xFA, 0xFD, 0xF4, 0xF3 |
| 1936 | }; |
| 1937 | |
| 1938 | static drflac_uint16 drflac__crc16_table[] = { |
| 1939 | 0x0000, 0x8005, 0x800F, 0x000A, 0x801B, 0x001E, 0x0014, 0x8011, |
| 1940 | 0x8033, 0x0036, 0x003C, 0x8039, 0x0028, 0x802D, 0x8027, 0x0022, |
| 1941 | 0x8063, 0x0066, 0x006C, 0x8069, 0x0078, 0x807D, 0x8077, 0x0072, |
| 1942 | 0x0050, 0x8055, 0x805F, 0x005A, 0x804B, 0x004E, 0x0044, 0x8041, |
| 1943 | 0x80C3, 0x00C6, 0x00CC, 0x80C9, 0x00D8, 0x80DD, 0x80D7, 0x00D2, |
| 1944 | 0x00F0, 0x80F5, 0x80FF, 0x00FA, 0x80EB, 0x00EE, 0x00E4, 0x80E1, |
| 1945 | 0x00A0, 0x80A5, 0x80AF, 0x00AA, 0x80BB, 0x00BE, 0x00B4, 0x80B1, |
| 1946 | 0x8093, 0x0096, 0x009C, 0x8099, 0x0088, 0x808D, 0x8087, 0x0082, |
| 1947 | 0x8183, 0x0186, 0x018C, 0x8189, 0x0198, 0x819D, 0x8197, 0x0192, |
| 1948 | 0x01B0, 0x81B5, 0x81BF, 0x01BA, 0x81AB, 0x01AE, 0x01A4, 0x81A1, |
| 1949 | 0x01E0, 0x81E5, 0x81EF, 0x01EA, 0x81FB, 0x01FE, 0x01F4, 0x81F1, |
| 1950 | 0x81D3, 0x01D6, 0x01DC, 0x81D9, 0x01C8, 0x81CD, 0x81C7, 0x01C2, |
| 1951 | 0x0140, 0x8145, 0x814F, 0x014A, 0x815B, 0x015E, 0x0154, 0x8151, |
| 1952 | 0x8173, 0x0176, 0x017C, 0x8179, 0x0168, 0x816D, 0x8167, 0x0162, |
| 1953 | 0x8123, 0x0126, 0x012C, 0x8129, 0x0138, 0x813D, 0x8137, 0x0132, |
| 1954 | 0x0110, 0x8115, 0x811F, 0x011A, 0x810B, 0x010E, 0x0104, 0x8101, |
| 1955 | 0x8303, 0x0306, 0x030C, 0x8309, 0x0318, 0x831D, 0x8317, 0x0312, |
| 1956 | 0x0330, 0x8335, 0x833F, 0x033A, 0x832B, 0x032E, 0x0324, 0x8321, |
| 1957 | 0x0360, 0x8365, 0x836F, 0x036A, 0x837B, 0x037E, 0x0374, 0x8371, |
| 1958 | 0x8353, 0x0356, 0x035C, 0x8359, 0x0348, 0x834D, 0x8347, 0x0342, |
| 1959 | 0x03C0, 0x83C5, 0x83CF, 0x03CA, 0x83DB, 0x03DE, 0x03D4, 0x83D1, |
| 1960 | 0x83F3, 0x03F6, 0x03FC, 0x83F9, 0x03E8, 0x83ED, 0x83E7, 0x03E2, |
| 1961 | 0x83A3, 0x03A6, 0x03AC, 0x83A9, 0x03B8, 0x83BD, 0x83B7, 0x03B2, |
| 1962 | 0x0390, 0x8395, 0x839F, 0x039A, 0x838B, 0x038E, 0x0384, 0x8381, |
| 1963 | 0x0280, 0x8285, 0x828F, 0x028A, 0x829B, 0x029E, 0x0294, 0x8291, |
| 1964 | 0x82B3, 0x02B6, 0x02BC, 0x82B9, 0x02A8, 0x82AD, 0x82A7, 0x02A2, |
| 1965 | 0x82E3, 0x02E6, 0x02EC, 0x82E9, 0x02F8, 0x82FD, 0x82F7, 0x02F2, |
| 1966 | 0x02D0, 0x82D5, 0x82DF, 0x02DA, 0x82CB, 0x02CE, 0x02C4, 0x82C1, |
| 1967 | 0x8243, 0x0246, 0x024C, 0x8249, 0x0258, 0x825D, 0x8257, 0x0252, |
| 1968 | 0x0270, 0x8275, 0x827F, 0x027A, 0x826B, 0x026E, 0x0264, 0x8261, |
| 1969 | 0x0220, 0x8225, 0x822F, 0x022A, 0x823B, 0x023E, 0x0234, 0x8231, |
| 1970 | 0x8213, 0x0216, 0x021C, 0x8219, 0x0208, 0x820D, 0x8207, 0x0202 |
| 1971 | }; |
| 1972 | |
| 1973 | static DRFLAC_INLINE drflac_uint8 drflac_crc8_byte(drflac_uint8 crc, drflac_uint8 data) |
| 1974 | { |
| 1975 | return drflac__crc8_table[crc ^ data]; |
| 1976 | } |
| 1977 | |
| 1978 | static DRFLAC_INLINE drflac_uint8 drflac_crc8(drflac_uint8 crc, drflac_uint32 data, drflac_uint32 count) |
| 1979 | { |
| 1980 | #ifdef DR_FLAC_NO_CRC |
| 1981 | (void)crc; |
| 1982 | (void)data; |
| 1983 | (void)count; |
| 1984 | return 0; |
| 1985 | #else |
| 1986 | #if 0 |
| 1987 | /* REFERENCE (use of this implementation requires an explicit flush by doing "drflac_crc8(crc, 0, 8);") */ |
| 1988 | drflac_uint8 p = 0x07; |
| 1989 | for (int i = count-1; i >= 0; --i) { |
| 1990 | drflac_uint8 bit = (data & (1 << i)) >> i; |
| 1991 | if (crc & 0x80) { |
| 1992 | crc = ((crc << 1) | bit) ^ p; |
| 1993 | } else { |
| 1994 | crc = ((crc << 1) | bit); |
| 1995 | } |
| 1996 | } |
| 1997 | return crc; |
| 1998 | #else |
| 1999 | drflac_uint32 wholeBytes; |
| 2000 | drflac_uint32 leftoverBits; |
| 2001 | drflac_uint64 leftoverDataMask; |
| 2002 | |
| 2003 | static drflac_uint64 leftoverDataMaskTable[8] = { |
| 2004 | 0x00, 0x01, 0x03, 0x07, 0x0F, 0x1F, 0x3F, 0x7F |
| 2005 | }; |
| 2006 | |
| 2007 | DRFLAC_ASSERT(count <= 32); |
| 2008 | |
| 2009 | wholeBytes = count >> 3; |
| 2010 | leftoverBits = count - (wholeBytes*8); |
| 2011 | leftoverDataMask = leftoverDataMaskTable[leftoverBits]; |
| 2012 | |
| 2013 | switch (wholeBytes) { |
| 2014 | case 4: crc = drflac_crc8_byte(crc, (drflac_uint8)((data & (0xFF000000UL << leftoverBits)) >> (24 + leftoverBits))); |
| 2015 | case 3: crc = drflac_crc8_byte(crc, (drflac_uint8)((data & (0x00FF0000UL << leftoverBits)) >> (16 + leftoverBits))); |
| 2016 | case 2: crc = drflac_crc8_byte(crc, (drflac_uint8)((data & (0x0000FF00UL << leftoverBits)) >> ( 8 + leftoverBits))); |
| 2017 | case 1: crc = drflac_crc8_byte(crc, (drflac_uint8)((data & (0x000000FFUL << leftoverBits)) >> ( 0 + leftoverBits))); |
| 2018 | case 0: if (leftoverBits > 0) crc = (drflac_uint8)((crc << leftoverBits) ^ drflac__crc8_table[(crc >> (8 - leftoverBits)) ^ (data & leftoverDataMask)]); |
| 2019 | } |
| 2020 | return crc; |
| 2021 | #endif |
| 2022 | #endif |
| 2023 | } |
| 2024 | |
| 2025 | static DRFLAC_INLINE drflac_uint16 drflac_crc16_byte(drflac_uint16 crc, drflac_uint8 data) |
| 2026 | { |
| 2027 | return (crc << 8) ^ drflac__crc16_table[(drflac_uint8)(crc >> 8) ^ data]; |
| 2028 | } |
| 2029 | |
| 2030 | static DRFLAC_INLINE drflac_uint16 drflac_crc16_cache(drflac_uint16 crc, drflac_cache_t data) |
| 2031 | { |
| 2032 | #ifdef DRFLAC_64BIT |
| 2033 | crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 56) & 0xFF)); |
| 2034 | crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 48) & 0xFF)); |
| 2035 | crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 40) & 0xFF)); |
| 2036 | crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 32) & 0xFF)); |
| 2037 | #endif |
| 2038 | crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 24) & 0xFF)); |
| 2039 | crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 16) & 0xFF)); |
| 2040 | crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 8) & 0xFF)); |
| 2041 | crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 0) & 0xFF)); |
| 2042 | |
| 2043 | return crc; |
| 2044 | } |
| 2045 | |
| 2046 | static DRFLAC_INLINE drflac_uint16 drflac_crc16_bytes(drflac_uint16 crc, drflac_cache_t data, drflac_uint32 byteCount) |
| 2047 | { |
| 2048 | switch (byteCount) |
| 2049 | { |
| 2050 | #ifdef DRFLAC_64BIT |
| 2051 | case 8: crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 56) & 0xFF)); |
| 2052 | case 7: crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 48) & 0xFF)); |
| 2053 | case 6: crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 40) & 0xFF)); |
| 2054 | case 5: crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 32) & 0xFF)); |
| 2055 | #endif |
| 2056 | case 4: crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 24) & 0xFF)); |
| 2057 | case 3: crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 16) & 0xFF)); |
| 2058 | case 2: crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 8) & 0xFF)); |
| 2059 | case 1: crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 0) & 0xFF)); |
| 2060 | } |
| 2061 | |
| 2062 | return crc; |
| 2063 | } |
| 2064 | |
| 2065 | #if 0 |
| 2066 | static DRFLAC_INLINE drflac_uint16 drflac_crc16__32bit(drflac_uint16 crc, drflac_uint32 data, drflac_uint32 count) |
| 2067 | { |
| 2068 | #ifdef DR_FLAC_NO_CRC |
| 2069 | (void)crc; |
| 2070 | (void)data; |
| 2071 | (void)count; |
| 2072 | return 0; |
| 2073 | #else |
| 2074 | #if 0 |
| 2075 | /* REFERENCE (use of this implementation requires an explicit flush by doing "drflac_crc16(crc, 0, 16);") */ |
| 2076 | drflac_uint16 p = 0x8005; |
| 2077 | for (int i = count-1; i >= 0; --i) { |
| 2078 | drflac_uint16 bit = (data & (1ULL << i)) >> i; |
| 2079 | if (r & 0x8000) { |
| 2080 | r = ((r << 1) | bit) ^ p; |
| 2081 | } else { |
| 2082 | r = ((r << 1) | bit); |
| 2083 | } |
| 2084 | } |
| 2085 | |
| 2086 | return crc; |
| 2087 | #else |
| 2088 | drflac_uint32 wholeBytes; |
| 2089 | drflac_uint32 leftoverBits; |
| 2090 | drflac_uint64 leftoverDataMask; |
| 2091 | |
| 2092 | static drflac_uint64 leftoverDataMaskTable[8] = { |
| 2093 | 0x00, 0x01, 0x03, 0x07, 0x0F, 0x1F, 0x3F, 0x7F |
| 2094 | }; |
| 2095 | |
| 2096 | DRFLAC_ASSERT(count <= 64); |
| 2097 | |
| 2098 | wholeBytes = count >> 3; |
| 2099 | leftoverBits = count & 7; |
| 2100 | leftoverDataMask = leftoverDataMaskTable[leftoverBits]; |
| 2101 | |
| 2102 | switch (wholeBytes) { |
| 2103 | default: |
| 2104 | case 4: crc = drflac_crc16_byte(crc, (drflac_uint8)((data & (0xFF000000UL << leftoverBits)) >> (24 + leftoverBits))); |
| 2105 | case 3: crc = drflac_crc16_byte(crc, (drflac_uint8)((data & (0x00FF0000UL << leftoverBits)) >> (16 + leftoverBits))); |
| 2106 | case 2: crc = drflac_crc16_byte(crc, (drflac_uint8)((data & (0x0000FF00UL << leftoverBits)) >> ( 8 + leftoverBits))); |
| 2107 | case 1: crc = drflac_crc16_byte(crc, (drflac_uint8)((data & (0x000000FFUL << leftoverBits)) >> ( 0 + leftoverBits))); |
| 2108 | case 0: if (leftoverBits > 0) crc = (crc << leftoverBits) ^ drflac__crc16_table[(crc >> (16 - leftoverBits)) ^ (data & leftoverDataMask)]; |
| 2109 | } |
| 2110 | return crc; |
| 2111 | #endif |
| 2112 | #endif |
| 2113 | } |
| 2114 | |
| 2115 | static DRFLAC_INLINE drflac_uint16 drflac_crc16__64bit(drflac_uint16 crc, drflac_uint64 data, drflac_uint32 count) |
| 2116 | { |
| 2117 | #ifdef DR_FLAC_NO_CRC |
| 2118 | (void)crc; |
| 2119 | (void)data; |
| 2120 | (void)count; |
| 2121 | return 0; |
| 2122 | #else |
| 2123 | drflac_uint32 wholeBytes; |
| 2124 | drflac_uint32 leftoverBits; |
| 2125 | drflac_uint64 leftoverDataMask; |
| 2126 | |
| 2127 | static drflac_uint64 leftoverDataMaskTable[8] = { |
| 2128 | 0x00, 0x01, 0x03, 0x07, 0x0F, 0x1F, 0x3F, 0x7F |
| 2129 | }; |
| 2130 | |
| 2131 | DRFLAC_ASSERT(count <= 64); |
| 2132 | |
| 2133 | wholeBytes = count >> 3; |
| 2134 | leftoverBits = count & 7; |
| 2135 | leftoverDataMask = leftoverDataMaskTable[leftoverBits]; |
| 2136 | |
| 2137 | switch (wholeBytes) { |
| 2138 | default: |
| 2139 | case 8: crc = drflac_crc16_byte(crc, (drflac_uint8)((data & (((drflac_uint64)0xFF000000 << 32) << leftoverBits)) >> (56 + leftoverBits))); /* Weird "<< 32" bitshift is required for C89 because it doesn't support 64-bit constants. Should be optimized out by a good compiler. */ |
| 2140 | case 7: crc = drflac_crc16_byte(crc, (drflac_uint8)((data & (((drflac_uint64)0x00FF0000 << 32) << leftoverBits)) >> (48 + leftoverBits))); |
| 2141 | case 6: crc = drflac_crc16_byte(crc, (drflac_uint8)((data & (((drflac_uint64)0x0000FF00 << 32) << leftoverBits)) >> (40 + leftoverBits))); |
| 2142 | case 5: crc = drflac_crc16_byte(crc, (drflac_uint8)((data & (((drflac_uint64)0x000000FF << 32) << leftoverBits)) >> (32 + leftoverBits))); |
| 2143 | case 4: crc = drflac_crc16_byte(crc, (drflac_uint8)((data & (((drflac_uint64)0xFF000000 ) << leftoverBits)) >> (24 + leftoverBits))); |
| 2144 | case 3: crc = drflac_crc16_byte(crc, (drflac_uint8)((data & (((drflac_uint64)0x00FF0000 ) << leftoverBits)) >> (16 + leftoverBits))); |
| 2145 | case 2: crc = drflac_crc16_byte(crc, (drflac_uint8)((data & (((drflac_uint64)0x0000FF00 ) << leftoverBits)) >> ( 8 + leftoverBits))); |
| 2146 | case 1: crc = drflac_crc16_byte(crc, (drflac_uint8)((data & (((drflac_uint64)0x000000FF ) << leftoverBits)) >> ( 0 + leftoverBits))); |
| 2147 | case 0: if (leftoverBits > 0) crc = (crc << leftoverBits) ^ drflac__crc16_table[(crc >> (16 - leftoverBits)) ^ (data & leftoverDataMask)]; |
| 2148 | } |
| 2149 | return crc; |
| 2150 | #endif |
| 2151 | } |
| 2152 | |
| 2153 | |
| 2154 | static DRFLAC_INLINE drflac_uint16 drflac_crc16(drflac_uint16 crc, drflac_cache_t data, drflac_uint32 count) |
| 2155 | { |
| 2156 | #ifdef DRFLAC_64BIT |
| 2157 | return drflac_crc16__64bit(crc, data, count); |
| 2158 | #else |
| 2159 | return drflac_crc16__32bit(crc, data, count); |
| 2160 | #endif |
| 2161 | } |
| 2162 | #endif |
| 2163 | |
| 2164 | |
| 2165 | #ifdef DRFLAC_64BIT |
| 2166 | #define drflac__be2host__cache_line drflac__be2host_64 |
| 2167 | #else |
| 2168 | #define drflac__be2host__cache_line drflac__be2host_32 |
| 2169 | #endif |
| 2170 | |
| 2171 | /* |
| 2172 | BIT READING ATTEMPT #2 |
| 2173 | |
| 2174 | This uses a 32- or 64-bit bit-shifted cache - as bits are read, the cache is shifted such that the first valid bit is sitting |
| 2175 | on the most significant bit. It uses the notion of an L1 and L2 cache (borrowed from CPU architecture), where the L1 cache |
| 2176 | is a 32- or 64-bit unsigned integer (depending on whether or not a 32- or 64-bit build is being compiled) and the L2 is an |
| 2177 | array of "cache lines", with each cache line being the same size as the L1. The L2 is a buffer of about 4KB and is where data |
| 2178 | from onRead() is read into. |
| 2179 | */ |
| 2180 | #define DRFLAC_CACHE_L1_SIZE_BYTES(bs) (sizeof((bs)->cache)) |
| 2181 | #define DRFLAC_CACHE_L1_SIZE_BITS(bs) (sizeof((bs)->cache)*8) |
| 2182 | #define DRFLAC_CACHE_L1_BITS_REMAINING(bs) (DRFLAC_CACHE_L1_SIZE_BITS(bs) - (bs)->consumedBits) |
| 2183 | #define DRFLAC_CACHE_L1_SELECTION_MASK(_bitCount) (~((~(drflac_cache_t)0) >> (_bitCount))) |
| 2184 | #define DRFLAC_CACHE_L1_SELECTION_SHIFT(bs, _bitCount) (DRFLAC_CACHE_L1_SIZE_BITS(bs) - (_bitCount)) |
| 2185 | #define DRFLAC_CACHE_L1_SELECT(bs, _bitCount) (((bs)->cache) & DRFLAC_CACHE_L1_SELECTION_MASK(_bitCount)) |
| 2186 | #define DRFLAC_CACHE_L1_SELECT_AND_SHIFT(bs, _bitCount) (DRFLAC_CACHE_L1_SELECT((bs), (_bitCount)) >> DRFLAC_CACHE_L1_SELECTION_SHIFT((bs), (_bitCount))) |
| 2187 | #define DRFLAC_CACHE_L1_SELECT_AND_SHIFT_SAFE(bs, _bitCount)(DRFLAC_CACHE_L1_SELECT((bs), (_bitCount)) >> (DRFLAC_CACHE_L1_SELECTION_SHIFT((bs), (_bitCount)) & (DRFLAC_CACHE_L1_SIZE_BITS(bs)-1))) |
| 2188 | #define DRFLAC_CACHE_L2_SIZE_BYTES(bs) (sizeof((bs)->cacheL2)) |
| 2189 | #define DRFLAC_CACHE_L2_LINE_COUNT(bs) (DRFLAC_CACHE_L2_SIZE_BYTES(bs) / sizeof((bs)->cacheL2[0])) |
| 2190 | #define DRFLAC_CACHE_L2_LINES_REMAINING(bs) (DRFLAC_CACHE_L2_LINE_COUNT(bs) - (bs)->nextL2Line) |
| 2191 | |
| 2192 | |
| 2193 | #ifndef DR_FLAC_NO_CRC |
| 2194 | static DRFLAC_INLINE void drflac__reset_crc16(drflac_bs* bs) |
| 2195 | { |
| 2196 | bs->crc16 = 0; |
| 2197 | bs->crc16CacheIgnoredBytes = bs->consumedBits >> 3; |
| 2198 | } |
| 2199 | |
| 2200 | static DRFLAC_INLINE void drflac__update_crc16(drflac_bs* bs) |
| 2201 | { |
| 2202 | if (bs->crc16CacheIgnoredBytes == 0) { |
| 2203 | bs->crc16 = drflac_crc16_cache(bs->crc16, bs->crc16Cache); |
| 2204 | } else { |
| 2205 | bs->crc16 = drflac_crc16_bytes(bs->crc16, bs->crc16Cache, DRFLAC_CACHE_L1_SIZE_BYTES(bs) - bs->crc16CacheIgnoredBytes); |
| 2206 | bs->crc16CacheIgnoredBytes = 0; |
| 2207 | } |
| 2208 | } |
| 2209 | |
| 2210 | static DRFLAC_INLINE drflac_uint16 drflac__flush_crc16(drflac_bs* bs) |
| 2211 | { |
| 2212 | /* We should never be flushing in a situation where we are not aligned on a byte boundary. */ |
| 2213 | DRFLAC_ASSERT((DRFLAC_CACHE_L1_BITS_REMAINING(bs) & 7) == 0); |
| 2214 | |
| 2215 | /* |
| 2216 | The bits that were read from the L1 cache need to be accumulated. The number of bytes needing to be accumulated is determined |
| 2217 | by the number of bits that have been consumed. |
| 2218 | */ |
| 2219 | if (DRFLAC_CACHE_L1_BITS_REMAINING(bs) == 0) { |
| 2220 | drflac__update_crc16(bs); |
| 2221 | } else { |
| 2222 | /* We only accumulate the consumed bits. */ |
| 2223 | bs->crc16 = drflac_crc16_bytes(bs->crc16, bs->crc16Cache >> DRFLAC_CACHE_L1_BITS_REMAINING(bs), (bs->consumedBits >> 3) - bs->crc16CacheIgnoredBytes); |
| 2224 | |
| 2225 | /* |
| 2226 | The bits that we just accumulated should never be accumulated again. We need to keep track of how many bytes were accumulated |
| 2227 | so we can handle that later. |
| 2228 | */ |
| 2229 | bs->crc16CacheIgnoredBytes = bs->consumedBits >> 3; |
| 2230 | } |
| 2231 | |
| 2232 | return bs->crc16; |
| 2233 | } |
| 2234 | #endif |
| 2235 | |
| 2236 | static DRFLAC_INLINE drflac_bool32 drflac__reload_l1_cache_from_l2(drflac_bs* bs) |
| 2237 | { |
| 2238 | size_t bytesRead; |
| 2239 | size_t alignedL1LineCount; |
| 2240 | |
| 2241 | /* Fast path. Try loading straight from L2. */ |
| 2242 | if (bs->nextL2Line < DRFLAC_CACHE_L2_LINE_COUNT(bs)) { |
| 2243 | bs->cache = bs->cacheL2[bs->nextL2Line++]; |
| 2244 | return DRFLAC_TRUE; |
| 2245 | } |
| 2246 | |
| 2247 | /* |
| 2248 | If we get here it means we've run out of data in the L2 cache. We'll need to fetch more from the client, if there's |
| 2249 | any left. |
| 2250 | */ |
| 2251 | if (bs->unalignedByteCount > 0) { |
| 2252 | return DRFLAC_FALSE; /* If we have any unaligned bytes it means there's no more aligned bytes left in the client. */ |
| 2253 | } |
| 2254 | |
| 2255 | bytesRead = bs->onRead(bs->pUserData, bs->cacheL2, DRFLAC_CACHE_L2_SIZE_BYTES(bs)); |
| 2256 | |
| 2257 | bs->nextL2Line = 0; |
| 2258 | if (bytesRead == DRFLAC_CACHE_L2_SIZE_BYTES(bs)) { |
| 2259 | bs->cache = bs->cacheL2[bs->nextL2Line++]; |
| 2260 | return DRFLAC_TRUE; |
| 2261 | } |
| 2262 | |
| 2263 | |
| 2264 | /* |
| 2265 | If we get here it means we were unable to retrieve enough data to fill the entire L2 cache. It probably |
| 2266 | means we've just reached the end of the file. We need to move the valid data down to the end of the buffer |
| 2267 | and adjust the index of the next line accordingly. Also keep in mind that the L2 cache must be aligned to |
| 2268 | the size of the L1 so we'll need to seek backwards by any misaligned bytes. |
| 2269 | */ |
| 2270 | alignedL1LineCount = bytesRead / DRFLAC_CACHE_L1_SIZE_BYTES(bs); |
| 2271 | |
| 2272 | /* We need to keep track of any unaligned bytes for later use. */ |
| 2273 | bs->unalignedByteCount = bytesRead - (alignedL1LineCount * DRFLAC_CACHE_L1_SIZE_BYTES(bs)); |
| 2274 | if (bs->unalignedByteCount > 0) { |
| 2275 | bs->unalignedCache = bs->cacheL2[alignedL1LineCount]; |
| 2276 | } |
| 2277 | |
| 2278 | if (alignedL1LineCount > 0) { |
| 2279 | size_t offset = DRFLAC_CACHE_L2_LINE_COUNT(bs) - alignedL1LineCount; |
| 2280 | size_t i; |
| 2281 | for (i = alignedL1LineCount; i > 0; --i) { |
| 2282 | bs->cacheL2[i-1 + offset] = bs->cacheL2[i-1]; |
| 2283 | } |
| 2284 | |
| 2285 | bs->nextL2Line = (drflac_uint32)offset; |
| 2286 | bs->cache = bs->cacheL2[bs->nextL2Line++]; |
| 2287 | return DRFLAC_TRUE; |
| 2288 | } else { |
| 2289 | /* If we get into this branch it means we weren't able to load any L1-aligned data. */ |
| 2290 | bs->nextL2Line = DRFLAC_CACHE_L2_LINE_COUNT(bs); |
| 2291 | return DRFLAC_FALSE; |
| 2292 | } |
| 2293 | } |
| 2294 | |
| 2295 | static drflac_bool32 drflac__reload_cache(drflac_bs* bs) |
| 2296 | { |
| 2297 | size_t bytesRead; |
| 2298 | |
| 2299 | #ifndef DR_FLAC_NO_CRC |
| 2300 | drflac__update_crc16(bs); |
| 2301 | #endif |
| 2302 | |
| 2303 | /* Fast path. Try just moving the next value in the L2 cache to the L1 cache. */ |
| 2304 | if (drflac__reload_l1_cache_from_l2(bs)) { |
| 2305 | bs->cache = drflac__be2host__cache_line(bs->cache); |
| 2306 | bs->consumedBits = 0; |
| 2307 | #ifndef DR_FLAC_NO_CRC |
| 2308 | bs->crc16Cache = bs->cache; |
| 2309 | #endif |
| 2310 | return DRFLAC_TRUE; |
| 2311 | } |
| 2312 | |
| 2313 | /* Slow path. */ |
| 2314 | |
| 2315 | /* |
| 2316 | If we get here it means we have failed to load the L1 cache from the L2. Likely we've just reached the end of the stream and the last |
| 2317 | few bytes did not meet the alignment requirements for the L2 cache. In this case we need to fall back to a slower path and read the |
| 2318 | data from the unaligned cache. |
| 2319 | */ |
| 2320 | bytesRead = bs->unalignedByteCount; |
| 2321 | if (bytesRead == 0) { |
| 2322 | bs->consumedBits = DRFLAC_CACHE_L1_SIZE_BITS(bs); /* <-- The stream has been exhausted, so marked the bits as consumed. */ |
| 2323 | return DRFLAC_FALSE; |
| 2324 | } |
| 2325 | |
| 2326 | DRFLAC_ASSERT(bytesRead < DRFLAC_CACHE_L1_SIZE_BYTES(bs)); |
| 2327 | bs->consumedBits = (drflac_uint32)(DRFLAC_CACHE_L1_SIZE_BYTES(bs) - bytesRead) * 8; |
| 2328 | |
| 2329 | bs->cache = drflac__be2host__cache_line(bs->unalignedCache); |
| 2330 | bs->cache &= DRFLAC_CACHE_L1_SELECTION_MASK(DRFLAC_CACHE_L1_BITS_REMAINING(bs)); /* <-- Make sure the consumed bits are always set to zero. Other parts of the library depend on this property. */ |
| 2331 | bs->unalignedByteCount = 0; /* <-- At this point the unaligned bytes have been moved into the cache and we thus have no more unaligned bytes. */ |
| 2332 | |
| 2333 | #ifndef DR_FLAC_NO_CRC |
| 2334 | bs->crc16Cache = bs->cache >> bs->consumedBits; |
| 2335 | bs->crc16CacheIgnoredBytes = bs->consumedBits >> 3; |
| 2336 | #endif |
| 2337 | return DRFLAC_TRUE; |
| 2338 | } |
| 2339 | |
| 2340 | static void drflac__reset_cache(drflac_bs* bs) |
| 2341 | { |
| 2342 | bs->nextL2Line = DRFLAC_CACHE_L2_LINE_COUNT(bs); /* <-- This clears the L2 cache. */ |
| 2343 | bs->consumedBits = DRFLAC_CACHE_L1_SIZE_BITS(bs); /* <-- This clears the L1 cache. */ |
| 2344 | bs->cache = 0; |
| 2345 | bs->unalignedByteCount = 0; /* <-- This clears the trailing unaligned bytes. */ |
| 2346 | bs->unalignedCache = 0; |
| 2347 | |
| 2348 | #ifndef DR_FLAC_NO_CRC |
| 2349 | bs->crc16Cache = 0; |
| 2350 | bs->crc16CacheIgnoredBytes = 0; |
| 2351 | #endif |
| 2352 | } |
| 2353 | |
| 2354 | |
| 2355 | static DRFLAC_INLINE drflac_bool32 drflac__read_uint32(drflac_bs* bs, unsigned int bitCount, drflac_uint32* pResultOut) |
| 2356 | { |
| 2357 | DRFLAC_ASSERT(bs != NULL); |
| 2358 | DRFLAC_ASSERT(pResultOut != NULL); |
| 2359 | DRFLAC_ASSERT(bitCount > 0); |
| 2360 | DRFLAC_ASSERT(bitCount <= 32); |
| 2361 | |
| 2362 | if (bs->consumedBits == DRFLAC_CACHE_L1_SIZE_BITS(bs)) { |
| 2363 | if (!drflac__reload_cache(bs)) { |
| 2364 | return DRFLAC_FALSE; |
| 2365 | } |
| 2366 | } |
| 2367 | |
| 2368 | if (bitCount <= DRFLAC_CACHE_L1_BITS_REMAINING(bs)) { |
| 2369 | /* |
| 2370 | If we want to load all 32-bits from a 32-bit cache we need to do it slightly differently because we can't do |
| 2371 | a 32-bit shift on a 32-bit integer. This will never be the case on 64-bit caches, so we can have a slightly |
| 2372 | more optimal solution for this. |
| 2373 | */ |
| 2374 | #ifdef DRFLAC_64BIT |
| 2375 | *pResultOut = (drflac_uint32)DRFLAC_CACHE_L1_SELECT_AND_SHIFT(bs, bitCount); |
| 2376 | bs->consumedBits += bitCount; |
| 2377 | bs->cache <<= bitCount; |
| 2378 | #else |
| 2379 | if (bitCount < DRFLAC_CACHE_L1_SIZE_BITS(bs)) { |
| 2380 | *pResultOut = (drflac_uint32)DRFLAC_CACHE_L1_SELECT_AND_SHIFT(bs, bitCount); |
| 2381 | bs->consumedBits += bitCount; |
| 2382 | bs->cache <<= bitCount; |
| 2383 | } else { |
| 2384 | /* Cannot shift by 32-bits, so need to do it differently. */ |
| 2385 | *pResultOut = (drflac_uint32)bs->cache; |
| 2386 | bs->consumedBits = DRFLAC_CACHE_L1_SIZE_BITS(bs); |
| 2387 | bs->cache = 0; |
| 2388 | } |
| 2389 | #endif |
| 2390 | |
| 2391 | return DRFLAC_TRUE; |
| 2392 | } else { |
| 2393 | /* It straddles the cached data. It will never cover more than the next chunk. We just read the number in two parts and combine them. */ |
| 2394 | drflac_uint32 bitCountHi = DRFLAC_CACHE_L1_BITS_REMAINING(bs); |
| 2395 | drflac_uint32 bitCountLo = bitCount - bitCountHi; |
| 2396 | drflac_uint32 resultHi; |
| 2397 | |
| 2398 | DRFLAC_ASSERT(bitCountHi > 0); |
| 2399 | DRFLAC_ASSERT(bitCountHi < 32); |
| 2400 | resultHi = (drflac_uint32)DRFLAC_CACHE_L1_SELECT_AND_SHIFT(bs, bitCountHi); |
| 2401 | |
| 2402 | if (!drflac__reload_cache(bs)) { |
| 2403 | return DRFLAC_FALSE; |
| 2404 | } |
| 2405 | |
| 2406 | *pResultOut = (resultHi << bitCountLo) | (drflac_uint32)DRFLAC_CACHE_L1_SELECT_AND_SHIFT(bs, bitCountLo); |
| 2407 | bs->consumedBits += bitCountLo; |
| 2408 | bs->cache <<= bitCountLo; |
| 2409 | return DRFLAC_TRUE; |
| 2410 | } |
| 2411 | } |
| 2412 | |
| 2413 | static drflac_bool32 drflac__read_int32(drflac_bs* bs, unsigned int bitCount, drflac_int32* pResult) |
| 2414 | { |
| 2415 | drflac_uint32 result; |
| 2416 | |
| 2417 | DRFLAC_ASSERT(bs != NULL); |
| 2418 | DRFLAC_ASSERT(pResult != NULL); |
| 2419 | DRFLAC_ASSERT(bitCount > 0); |
| 2420 | DRFLAC_ASSERT(bitCount <= 32); |
| 2421 | |
| 2422 | if (!drflac__read_uint32(bs, bitCount, &result)) { |
| 2423 | return DRFLAC_FALSE; |
| 2424 | } |
| 2425 | |
| 2426 | /* Do not attempt to shift by 32 as it's undefined. */ |
| 2427 | if (bitCount < 32) { |
| 2428 | drflac_uint32 signbit; |
| 2429 | signbit = ((result >> (bitCount-1)) & 0x01); |
| 2430 | result |= (~signbit + 1) << bitCount; |
| 2431 | } |
| 2432 | |
| 2433 | *pResult = (drflac_int32)result; |
| 2434 | return DRFLAC_TRUE; |
| 2435 | } |
| 2436 | |
| 2437 | #ifdef DRFLAC_64BIT |
| 2438 | static drflac_bool32 drflac__read_uint64(drflac_bs* bs, unsigned int bitCount, drflac_uint64* pResultOut) |
| 2439 | { |
| 2440 | drflac_uint32 resultHi; |
| 2441 | drflac_uint32 resultLo; |
| 2442 | |
| 2443 | DRFLAC_ASSERT(bitCount <= 64); |
| 2444 | DRFLAC_ASSERT(bitCount > 32); |
| 2445 | |
| 2446 | if (!drflac__read_uint32(bs, bitCount - 32, &resultHi)) { |
| 2447 | return DRFLAC_FALSE; |
| 2448 | } |
| 2449 | |
| 2450 | if (!drflac__read_uint32(bs, 32, &resultLo)) { |
| 2451 | return DRFLAC_FALSE; |
| 2452 | } |
| 2453 | |
| 2454 | *pResultOut = (((drflac_uint64)resultHi) << 32) | ((drflac_uint64)resultLo); |
| 2455 | return DRFLAC_TRUE; |
| 2456 | } |
| 2457 | #endif |
| 2458 | |
| 2459 | /* Function below is unused, but leaving it here in case I need to quickly add it again. */ |
| 2460 | #if 0 |
| 2461 | static drflac_bool32 drflac__read_int64(drflac_bs* bs, unsigned int bitCount, drflac_int64* pResultOut) |
| 2462 | { |
| 2463 | drflac_uint64 result; |
| 2464 | drflac_uint64 signbit; |
| 2465 | |
| 2466 | DRFLAC_ASSERT(bitCount <= 64); |
| 2467 | |
| 2468 | if (!drflac__read_uint64(bs, bitCount, &result)) { |
| 2469 | return DRFLAC_FALSE; |
| 2470 | } |
| 2471 | |
| 2472 | signbit = ((result >> (bitCount-1)) & 0x01); |
| 2473 | result |= (~signbit + 1) << bitCount; |
| 2474 | |
| 2475 | *pResultOut = (drflac_int64)result; |
| 2476 | return DRFLAC_TRUE; |
| 2477 | } |
| 2478 | #endif |
| 2479 | |
| 2480 | static drflac_bool32 drflac__read_uint16(drflac_bs* bs, unsigned int bitCount, drflac_uint16* pResult) |
| 2481 | { |
| 2482 | drflac_uint32 result; |
| 2483 | |
| 2484 | DRFLAC_ASSERT(bs != NULL); |
| 2485 | DRFLAC_ASSERT(pResult != NULL); |
| 2486 | DRFLAC_ASSERT(bitCount > 0); |
| 2487 | DRFLAC_ASSERT(bitCount <= 16); |
| 2488 | |
| 2489 | if (!drflac__read_uint32(bs, bitCount, &result)) { |
| 2490 | return DRFLAC_FALSE; |
| 2491 | } |
| 2492 | |
| 2493 | *pResult = (drflac_uint16)result; |
| 2494 | return DRFLAC_TRUE; |
| 2495 | } |
| 2496 | |
| 2497 | #if 0 |
| 2498 | static drflac_bool32 drflac__read_int16(drflac_bs* bs, unsigned int bitCount, drflac_int16* pResult) |
| 2499 | { |
| 2500 | drflac_int32 result; |
| 2501 | |
| 2502 | DRFLAC_ASSERT(bs != NULL); |
| 2503 | DRFLAC_ASSERT(pResult != NULL); |
| 2504 | DRFLAC_ASSERT(bitCount > 0); |
| 2505 | DRFLAC_ASSERT(bitCount <= 16); |
| 2506 | |
| 2507 | if (!drflac__read_int32(bs, bitCount, &result)) { |
| 2508 | return DRFLAC_FALSE; |
| 2509 | } |
| 2510 | |
| 2511 | *pResult = (drflac_int16)result; |
| 2512 | return DRFLAC_TRUE; |
| 2513 | } |
| 2514 | #endif |
| 2515 | |
| 2516 | static drflac_bool32 drflac__read_uint8(drflac_bs* bs, unsigned int bitCount, drflac_uint8* pResult) |
| 2517 | { |
| 2518 | drflac_uint32 result; |
| 2519 | |
| 2520 | DRFLAC_ASSERT(bs != NULL); |
| 2521 | DRFLAC_ASSERT(pResult != NULL); |
| 2522 | DRFLAC_ASSERT(bitCount > 0); |
| 2523 | DRFLAC_ASSERT(bitCount <= 8); |
| 2524 | |
| 2525 | if (!drflac__read_uint32(bs, bitCount, &result)) { |
| 2526 | return DRFLAC_FALSE; |
| 2527 | } |
| 2528 | |
| 2529 | *pResult = (drflac_uint8)result; |
| 2530 | return DRFLAC_TRUE; |
| 2531 | } |
| 2532 | |
| 2533 | static drflac_bool32 drflac__read_int8(drflac_bs* bs, unsigned int bitCount, drflac_int8* pResult) |
| 2534 | { |
| 2535 | drflac_int32 result; |
| 2536 | |
| 2537 | DRFLAC_ASSERT(bs != NULL); |
| 2538 | DRFLAC_ASSERT(pResult != NULL); |
| 2539 | DRFLAC_ASSERT(bitCount > 0); |
| 2540 | DRFLAC_ASSERT(bitCount <= 8); |
| 2541 | |
| 2542 | if (!drflac__read_int32(bs, bitCount, &result)) { |
| 2543 | return DRFLAC_FALSE; |
| 2544 | } |
| 2545 | |
| 2546 | *pResult = (drflac_int8)result; |
| 2547 | return DRFLAC_TRUE; |
| 2548 | } |
| 2549 | |
| 2550 | |
| 2551 | static drflac_bool32 drflac__seek_bits(drflac_bs* bs, size_t bitsToSeek) |
| 2552 | { |
| 2553 | if (bitsToSeek <= DRFLAC_CACHE_L1_BITS_REMAINING(bs)) { |
| 2554 | bs->consumedBits += (drflac_uint32)bitsToSeek; |
| 2555 | bs->cache <<= bitsToSeek; |
| 2556 | return DRFLAC_TRUE; |
| 2557 | } else { |
| 2558 | /* It straddles the cached data. This function isn't called too frequently so I'm favouring simplicity here. */ |
| 2559 | bitsToSeek -= DRFLAC_CACHE_L1_BITS_REMAINING(bs); |
| 2560 | bs->consumedBits += DRFLAC_CACHE_L1_BITS_REMAINING(bs); |
| 2561 | bs->cache = 0; |
| 2562 | |
| 2563 | /* Simple case. Seek in groups of the same number as bits that fit within a cache line. */ |
| 2564 | #ifdef DRFLAC_64BIT |
| 2565 | while (bitsToSeek >= DRFLAC_CACHE_L1_SIZE_BITS(bs)) { |
| 2566 | drflac_uint64 bin; |
| 2567 | if (!drflac__read_uint64(bs, DRFLAC_CACHE_L1_SIZE_BITS(bs), &bin)) { |
| 2568 | return DRFLAC_FALSE; |
| 2569 | } |
| 2570 | bitsToSeek -= DRFLAC_CACHE_L1_SIZE_BITS(bs); |
| 2571 | } |
| 2572 | #else |
| 2573 | while (bitsToSeek >= DRFLAC_CACHE_L1_SIZE_BITS(bs)) { |
| 2574 | drflac_uint32 bin; |
| 2575 | if (!drflac__read_uint32(bs, DRFLAC_CACHE_L1_SIZE_BITS(bs), &bin)) { |
| 2576 | return DRFLAC_FALSE; |
| 2577 | } |
| 2578 | bitsToSeek -= DRFLAC_CACHE_L1_SIZE_BITS(bs); |
| 2579 | } |
| 2580 | #endif |
| 2581 | |
| 2582 | /* Whole leftover bytes. */ |
| 2583 | while (bitsToSeek >= 8) { |
| 2584 | drflac_uint8 bin; |
| 2585 | if (!drflac__read_uint8(bs, 8, &bin)) { |
| 2586 | return DRFLAC_FALSE; |
| 2587 | } |
| 2588 | bitsToSeek -= 8; |
| 2589 | } |
| 2590 | |
| 2591 | /* Leftover bits. */ |
| 2592 | if (bitsToSeek > 0) { |
| 2593 | drflac_uint8 bin; |
| 2594 | if (!drflac__read_uint8(bs, (drflac_uint32)bitsToSeek, &bin)) { |
| 2595 | return DRFLAC_FALSE; |
| 2596 | } |
| 2597 | bitsToSeek = 0; /* <-- Necessary for the assert below. */ |
| 2598 | } |
| 2599 | |
| 2600 | DRFLAC_ASSERT(bitsToSeek == 0); |
| 2601 | return DRFLAC_TRUE; |
| 2602 | } |
| 2603 | } |
| 2604 | |
| 2605 | |
| 2606 | /* This function moves the bit streamer to the first bit after the sync code (bit 15 of the of the frame header). It will also update the CRC-16. */ |
| 2607 | static drflac_bool32 drflac__find_and_seek_to_next_sync_code(drflac_bs* bs) |
| 2608 | { |
| 2609 | DRFLAC_ASSERT(bs != NULL); |
| 2610 | |
| 2611 | /* |
| 2612 | The sync code is always aligned to 8 bits. This is convenient for us because it means we can do byte-aligned movements. The first |
| 2613 | thing to do is align to the next byte. |
| 2614 | */ |
| 2615 | if (!drflac__seek_bits(bs, DRFLAC_CACHE_L1_BITS_REMAINING(bs) & 7)) { |
| 2616 | return DRFLAC_FALSE; |
| 2617 | } |
| 2618 | |
| 2619 | for (;;) { |
| 2620 | drflac_uint8 hi; |
| 2621 | |
| 2622 | #ifndef DR_FLAC_NO_CRC |
| 2623 | drflac__reset_crc16(bs); |
| 2624 | #endif |
| 2625 | |
| 2626 | if (!drflac__read_uint8(bs, 8, &hi)) { |
| 2627 | return DRFLAC_FALSE; |
| 2628 | } |
| 2629 | |
| 2630 | if (hi == 0xFF) { |
| 2631 | drflac_uint8 lo; |
| 2632 | if (!drflac__read_uint8(bs, 6, &lo)) { |
| 2633 | return DRFLAC_FALSE; |
| 2634 | } |
| 2635 | |
| 2636 | if (lo == 0x3E) { |
| 2637 | return DRFLAC_TRUE; |
| 2638 | } else { |
| 2639 | if (!drflac__seek_bits(bs, DRFLAC_CACHE_L1_BITS_REMAINING(bs) & 7)) { |
| 2640 | return DRFLAC_FALSE; |
| 2641 | } |
| 2642 | } |
| 2643 | } |
| 2644 | } |
| 2645 | |
| 2646 | /* Should never get here. */ |
| 2647 | /*return DRFLAC_FALSE;*/ |
| 2648 | } |
| 2649 | |
| 2650 | |
| 2651 | #if defined(DRFLAC_HAS_LZCNT_INTRINSIC) |
| 2652 | #define DRFLAC_IMPLEMENT_CLZ_LZCNT |
| 2653 | #endif |
| 2654 | #if defined(_MSC_VER) && _MSC_VER >= 1400 && (defined(DRFLAC_X64) || defined(DRFLAC_X86)) && !defined(__clang__) |
| 2655 | #define DRFLAC_IMPLEMENT_CLZ_MSVC |
| 2656 | #endif |
| 2657 | |
| 2658 | static DRFLAC_INLINE drflac_uint32 drflac__clz_software(drflac_cache_t x) |
| 2659 | { |
| 2660 | drflac_uint32 n; |
| 2661 | static drflac_uint32 clz_table_4[] = { |
| 2662 | 0, |
| 2663 | 4, |
| 2664 | 3, 3, |
| 2665 | 2, 2, 2, 2, |
| 2666 | 1, 1, 1, 1, 1, 1, 1, 1 |
| 2667 | }; |
| 2668 | |
| 2669 | if (x == 0) { |
| 2670 | return sizeof(x)*8; |
| 2671 | } |
| 2672 | |
| 2673 | n = clz_table_4[x >> (sizeof(x)*8 - 4)]; |
| 2674 | if (n == 0) { |
| 2675 | #ifdef DRFLAC_64BIT |
| 2676 | if ((x & ((drflac_uint64)0xFFFFFFFF << 32)) == 0) { n = 32; x <<= 32; } |
| 2677 | if ((x & ((drflac_uint64)0xFFFF0000 << 32)) == 0) { n += 16; x <<= 16; } |
| 2678 | if ((x & ((drflac_uint64)0xFF000000 << 32)) == 0) { n += 8; x <<= 8; } |
| 2679 | if ((x & ((drflac_uint64)0xF0000000 << 32)) == 0) { n += 4; x <<= 4; } |
| 2680 | #else |
| 2681 | if ((x & 0xFFFF0000) == 0) { n = 16; x <<= 16; } |
| 2682 | if ((x & 0xFF000000) == 0) { n += 8; x <<= 8; } |
| 2683 | if ((x & 0xF0000000) == 0) { n += 4; x <<= 4; } |
| 2684 | #endif |
| 2685 | n += clz_table_4[x >> (sizeof(x)*8 - 4)]; |
| 2686 | } |
| 2687 | |
| 2688 | return n - 1; |
| 2689 | } |
| 2690 | |
| 2691 | #ifdef DRFLAC_IMPLEMENT_CLZ_LZCNT |
| 2692 | static DRFLAC_INLINE drflac_bool32 drflac__is_lzcnt_supported(void) |
| 2693 | { |
| 2694 | /* Fast compile time check for ARM. */ |
| 2695 | #if defined(DRFLAC_HAS_LZCNT_INTRINSIC) && defined(DRFLAC_ARM) && (defined(__ARM_ARCH) && __ARM_ARCH >= 5) |
| 2696 | return DRFLAC_TRUE; |
| 2697 | #else |
| 2698 | /* If the compiler itself does not support the intrinsic then we'll need to return false. */ |
| 2699 | #ifdef DRFLAC_HAS_LZCNT_INTRINSIC |
| 2700 | return drflac__gIsLZCNTSupported; |
| 2701 | #else |
| 2702 | return DRFLAC_FALSE; |
| 2703 | #endif |
| 2704 | #endif |
| 2705 | } |
| 2706 | |
| 2707 | static DRFLAC_INLINE drflac_uint32 drflac__clz_lzcnt(drflac_cache_t x) |
| 2708 | { |
| 2709 | /* |
| 2710 | It's critical for competitive decoding performance that this function be highly optimal. With MSVC we can use the __lzcnt64() and __lzcnt() intrinsics |
| 2711 | to achieve good performance, however on GCC and Clang it's a little bit more annoying. The __builtin_clzl() and __builtin_clzll() intrinsics leave |
| 2712 | it undefined as to the return value when `x` is 0. We need this to be well defined as returning 32 or 64, depending on whether or not it's a 32- or |
| 2713 | 64-bit build. To work around this we would need to add a conditional to check for the x = 0 case, but this creates unnecessary inefficiency. To work |
| 2714 | around this problem I have written some inline assembly to emit the LZCNT (x86) or CLZ (ARM) instruction directly which removes the need to include |
| 2715 | the conditional. This has worked well in the past, but for some reason Clang's MSVC compatible driver, clang-cl, does not seem to be handling this |
| 2716 | in the same way as the normal Clang driver. It seems that `clang-cl` is just outputting the wrong results sometimes, maybe due to some register |
| 2717 | getting clobbered? |
| 2718 | |
| 2719 | I'm not sure if this is a bug with dr_flac's inlined assembly (most likely), a bug in `clang-cl` or just a misunderstanding on my part with inline |
| 2720 | assembly rules for `clang-cl`. If somebody can identify an error in dr_flac's inlined assembly I'm happy to get that fixed. |
| 2721 | |
| 2722 | Fortunately there is an easy workaround for this. Clang implements MSVC-specific intrinsics for compatibility. It also defines _MSC_VER for extra |
| 2723 | compatibility. We can therefore just check for _MSC_VER and use the MSVC intrinsic which, fortunately for us, Clang supports. It would still be nice |
| 2724 | to know how to fix the inlined assembly for correctness sake, however. |
| 2725 | */ |
| 2726 | |
| 2727 | #if defined(_MSC_VER) /*&& !defined(__clang__)*/ /* <-- Intentionally wanting Clang to use the MSVC __lzcnt64/__lzcnt intrinsics due to above ^. */ |
| 2728 | #ifdef DRFLAC_64BIT |
| 2729 | return (drflac_uint32)__lzcnt64(x); |
| 2730 | #else |
| 2731 | return (drflac_uint32)__lzcnt(x); |
| 2732 | #endif |
| 2733 | #else |
| 2734 | #if defined(__GNUC__) || defined(__clang__) |
| 2735 | #if defined(DRFLAC_X64) |
| 2736 | { |
| 2737 | drflac_uint64 r; |
| 2738 | __asm__ __volatile__ ( |
| 2739 | "lzcnt{ %1, %0| %0, %1}" : "=r"(r) : "r"(x) : "cc" |
| 2740 | ); |
| 2741 | |
| 2742 | return (drflac_uint32)r; |
| 2743 | } |
| 2744 | #elif defined(DRFLAC_X86) |
| 2745 | { |
| 2746 | drflac_uint32 r; |
| 2747 | __asm__ __volatile__ ( |
| 2748 | "lzcnt{l %1, %0| %0, %1}" : "=r"(r) : "r"(x) : "cc" |
| 2749 | ); |
| 2750 | |
| 2751 | return r; |
| 2752 | } |
| 2753 | #elif defined(DRFLAC_ARM) && (defined(__ARM_ARCH) && __ARM_ARCH >= 5) && !defined(DRFLAC_64BIT) /* <-- I haven't tested 64-bit inline assembly, so only enabling this for the 32-bit build for now. */ |
| 2754 | { |
| 2755 | unsigned int r; |
| 2756 | __asm__ __volatile__ ( |
| 2757 | #if defined(DRFLAC_64BIT) |
| 2758 | "clz %w[out], %w[in]" : [out]"=r"(r) : [in]"r"(x) /* <-- This is untested. If someone in the community could test this, that would be appreciated! */ |
| 2759 | #else |
| 2760 | "clz %[out], %[in]" : [out]"=r"(r) : [in]"r"(x) |
| 2761 | #endif |
| 2762 | ); |
| 2763 | |
| 2764 | return r; |
| 2765 | } |
| 2766 | #else |
| 2767 | if (x == 0) { |
| 2768 | return sizeof(x)*8; |
| 2769 | } |
| 2770 | #ifdef DRFLAC_64BIT |
| 2771 | return (drflac_uint32)__builtin_clzll((drflac_uint64)x); |
| 2772 | #else |
| 2773 | return (drflac_uint32)__builtin_clzl((drflac_uint32)x); |
| 2774 | #endif |
| 2775 | #endif |
| 2776 | #else |
| 2777 | /* Unsupported compiler. */ |
| 2778 | #error "This compiler does not support the lzcnt intrinsic." |
| 2779 | #endif |
| 2780 | #endif |
| 2781 | } |
| 2782 | #endif |
| 2783 | |
| 2784 | #ifdef DRFLAC_IMPLEMENT_CLZ_MSVC |
| 2785 | #include <intrin.h> /* For BitScanReverse(). */ |
| 2786 | |
| 2787 | static DRFLAC_INLINE drflac_uint32 drflac__clz_msvc(drflac_cache_t x) |
| 2788 | { |
| 2789 | drflac_uint32 n; |
| 2790 | |
| 2791 | if (x == 0) { |
| 2792 | return sizeof(x)*8; |
| 2793 | } |
| 2794 | |
| 2795 | #ifdef DRFLAC_64BIT |
| 2796 | _BitScanReverse64((unsigned long*)&n, x); |
| 2797 | #else |
| 2798 | _BitScanReverse((unsigned long*)&n, x); |
| 2799 | #endif |
| 2800 | return sizeof(x)*8 - n - 1; |
| 2801 | } |
| 2802 | #endif |
| 2803 | |
| 2804 | static DRFLAC_INLINE drflac_uint32 drflac__clz(drflac_cache_t x) |
| 2805 | { |
| 2806 | #ifdef DRFLAC_IMPLEMENT_CLZ_LZCNT |
| 2807 | if (drflac__is_lzcnt_supported()) { |
| 2808 | return drflac__clz_lzcnt(x); |
| 2809 | } else |
| 2810 | #endif |
| 2811 | { |
| 2812 | #ifdef DRFLAC_IMPLEMENT_CLZ_MSVC |
| 2813 | return drflac__clz_msvc(x); |
| 2814 | #else |
| 2815 | return drflac__clz_software(x); |
| 2816 | #endif |
| 2817 | } |
| 2818 | } |
| 2819 | |
| 2820 | |
| 2821 | static DRFLAC_INLINE drflac_bool32 drflac__seek_past_next_set_bit(drflac_bs* bs, unsigned int* pOffsetOut) |
| 2822 | { |
| 2823 | drflac_uint32 zeroCounter = 0; |
| 2824 | drflac_uint32 setBitOffsetPlus1; |
| 2825 | |
| 2826 | while (bs->cache == 0) { |
| 2827 | zeroCounter += (drflac_uint32)DRFLAC_CACHE_L1_BITS_REMAINING(bs); |
| 2828 | if (!drflac__reload_cache(bs)) { |
| 2829 | return DRFLAC_FALSE; |
| 2830 | } |
| 2831 | } |
| 2832 | |
| 2833 | setBitOffsetPlus1 = drflac__clz(bs->cache); |
| 2834 | setBitOffsetPlus1 += 1; |
| 2835 | |
| 2836 | bs->consumedBits += setBitOffsetPlus1; |
| 2837 | bs->cache <<= setBitOffsetPlus1; |
| 2838 | |
| 2839 | *pOffsetOut = zeroCounter + setBitOffsetPlus1 - 1; |
| 2840 | return DRFLAC_TRUE; |
| 2841 | } |
| 2842 | |
| 2843 | |
| 2844 | |
| 2845 | static drflac_bool32 drflac__seek_to_byte(drflac_bs* bs, drflac_uint64 offsetFromStart) |
| 2846 | { |
| 2847 | DRFLAC_ASSERT(bs != NULL); |
| 2848 | DRFLAC_ASSERT(offsetFromStart > 0); |
| 2849 | |
| 2850 | /* |
| 2851 | Seeking from the start is not quite as trivial as it sounds because the onSeek callback takes a signed 32-bit integer (which |
| 2852 | is intentional because it simplifies the implementation of the onSeek callbacks), however offsetFromStart is unsigned 64-bit. |
| 2853 | To resolve we just need to do an initial seek from the start, and then a series of offset seeks to make up the remainder. |
| 2854 | */ |
| 2855 | if (offsetFromStart > 0x7FFFFFFF) { |
| 2856 | drflac_uint64 bytesRemaining = offsetFromStart; |
| 2857 | if (!bs->onSeek(bs->pUserData, 0x7FFFFFFF, drflac_seek_origin_start)) { |
| 2858 | return DRFLAC_FALSE; |
| 2859 | } |
| 2860 | bytesRemaining -= 0x7FFFFFFF; |
| 2861 | |
| 2862 | while (bytesRemaining > 0x7FFFFFFF) { |
| 2863 | if (!bs->onSeek(bs->pUserData, 0x7FFFFFFF, drflac_seek_origin_current)) { |
| 2864 | return DRFLAC_FALSE; |
| 2865 | } |
| 2866 | bytesRemaining -= 0x7FFFFFFF; |
| 2867 | } |
| 2868 | |
| 2869 | if (bytesRemaining > 0) { |
| 2870 | if (!bs->onSeek(bs->pUserData, (int)bytesRemaining, drflac_seek_origin_current)) { |
| 2871 | return DRFLAC_FALSE; |
| 2872 | } |
| 2873 | } |
| 2874 | } else { |
| 2875 | if (!bs->onSeek(bs->pUserData, (int)offsetFromStart, drflac_seek_origin_start)) { |
| 2876 | return DRFLAC_FALSE; |
| 2877 | } |
| 2878 | } |
| 2879 | |
| 2880 | /* The cache should be reset to force a reload of fresh data from the client. */ |
| 2881 | drflac__reset_cache(bs); |
| 2882 | return DRFLAC_TRUE; |
| 2883 | } |
| 2884 | |
| 2885 | |
| 2886 | static drflac_result drflac__read_utf8_coded_number(drflac_bs* bs, drflac_uint64* pNumberOut, drflac_uint8* pCRCOut) |
| 2887 | { |
| 2888 | drflac_uint8 crc; |
| 2889 | drflac_uint64 result; |
| 2890 | drflac_uint8 utf8[7] = {0}; |
| 2891 | int byteCount; |
| 2892 | int i; |
| 2893 | |
| 2894 | DRFLAC_ASSERT(bs != NULL); |
| 2895 | DRFLAC_ASSERT(pNumberOut != NULL); |
| 2896 | DRFLAC_ASSERT(pCRCOut != NULL); |
| 2897 | |
| 2898 | crc = *pCRCOut; |
| 2899 | |
| 2900 | if (!drflac__read_uint8(bs, 8, utf8)) { |
| 2901 | *pNumberOut = 0; |
| 2902 | return DRFLAC_AT_END; |
| 2903 | } |
| 2904 | crc = drflac_crc8(crc, utf8[0], 8); |
| 2905 | |
| 2906 | if ((utf8[0] & 0x80) == 0) { |
| 2907 | *pNumberOut = utf8[0]; |
| 2908 | *pCRCOut = crc; |
| 2909 | return DRFLAC_SUCCESS; |
| 2910 | } |
| 2911 | |
| 2912 | /*byteCount = 1;*/ |
| 2913 | if ((utf8[0] & 0xE0) == 0xC0) { |
| 2914 | byteCount = 2; |
| 2915 | } else if ((utf8[0] & 0xF0) == 0xE0) { |
| 2916 | byteCount = 3; |
| 2917 | } else if ((utf8[0] & 0xF8) == 0xF0) { |
| 2918 | byteCount = 4; |
| 2919 | } else if ((utf8[0] & 0xFC) == 0xF8) { |
| 2920 | byteCount = 5; |
| 2921 | } else if ((utf8[0] & 0xFE) == 0xFC) { |
| 2922 | byteCount = 6; |
| 2923 | } else if ((utf8[0] & 0xFF) == 0xFE) { |
| 2924 | byteCount = 7; |
| 2925 | } else { |
| 2926 | *pNumberOut = 0; |
| 2927 | return DRFLAC_CRC_MISMATCH; /* Bad UTF-8 encoding. */ |
| 2928 | } |
| 2929 | |
| 2930 | /* Read extra bytes. */ |
| 2931 | DRFLAC_ASSERT(byteCount > 1); |
| 2932 | |
| 2933 | result = (drflac_uint64)(utf8[0] & (0xFF >> (byteCount + 1))); |
| 2934 | for (i = 1; i < byteCount; ++i) { |
| 2935 | if (!drflac__read_uint8(bs, 8, utf8 + i)) { |
| 2936 | *pNumberOut = 0; |
| 2937 | return DRFLAC_AT_END; |
| 2938 | } |
| 2939 | crc = drflac_crc8(crc, utf8[i], 8); |
| 2940 | |
| 2941 | result = (result << 6) | (utf8[i] & 0x3F); |
| 2942 | } |
| 2943 | |
| 2944 | *pNumberOut = result; |
| 2945 | *pCRCOut = crc; |
| 2946 | return DRFLAC_SUCCESS; |
| 2947 | } |
| 2948 | |
| 2949 | |
| 2950 | |
| 2951 | /* |
| 2952 | The next two functions are responsible for calculating the prediction. |
| 2953 | |
| 2954 | When the bits per sample is >16 we need to use 64-bit integer arithmetic because otherwise we'll run out of precision. It's |
| 2955 | safe to assume this will be slower on 32-bit platforms so we use a more optimal solution when the bits per sample is <=16. |
| 2956 | */ |
| 2957 | static DRFLAC_INLINE drflac_int32 drflac__calculate_prediction_32(drflac_uint32 order, drflac_int32 shift, const drflac_int32* coefficients, drflac_int32* pDecodedSamples) |
| 2958 | { |
| 2959 | drflac_int32 prediction = 0; |
| 2960 | |
| 2961 | DRFLAC_ASSERT(order <= 32); |
| 2962 | |
| 2963 | /* 32-bit version. */ |
| 2964 | |
| 2965 | /* VC++ optimizes this to a single jmp. I've not yet verified this for other compilers. */ |
| 2966 | switch (order) |
| 2967 | { |
| 2968 | case 32: prediction += coefficients[31] * pDecodedSamples[-32]; |
| 2969 | case 31: prediction += coefficients[30] * pDecodedSamples[-31]; |
| 2970 | case 30: prediction += coefficients[29] * pDecodedSamples[-30]; |
| 2971 | case 29: prediction += coefficients[28] * pDecodedSamples[-29]; |
| 2972 | case 28: prediction += coefficients[27] * pDecodedSamples[-28]; |
| 2973 | case 27: prediction += coefficients[26] * pDecodedSamples[-27]; |
| 2974 | case 26: prediction += coefficients[25] * pDecodedSamples[-26]; |
| 2975 | case 25: prediction += coefficients[24] * pDecodedSamples[-25]; |
| 2976 | case 24: prediction += coefficients[23] * pDecodedSamples[-24]; |
| 2977 | case 23: prediction += coefficients[22] * pDecodedSamples[-23]; |
| 2978 | case 22: prediction += coefficients[21] * pDecodedSamples[-22]; |
| 2979 | case 21: prediction += coefficients[20] * pDecodedSamples[-21]; |
| 2980 | case 20: prediction += coefficients[19] * pDecodedSamples[-20]; |
| 2981 | case 19: prediction += coefficients[18] * pDecodedSamples[-19]; |
| 2982 | case 18: prediction += coefficients[17] * pDecodedSamples[-18]; |
| 2983 | case 17: prediction += coefficients[16] * pDecodedSamples[-17]; |
| 2984 | case 16: prediction += coefficients[15] * pDecodedSamples[-16]; |
| 2985 | case 15: prediction += coefficients[14] * pDecodedSamples[-15]; |
| 2986 | case 14: prediction += coefficients[13] * pDecodedSamples[-14]; |
| 2987 | case 13: prediction += coefficients[12] * pDecodedSamples[-13]; |
| 2988 | case 12: prediction += coefficients[11] * pDecodedSamples[-12]; |
| 2989 | case 11: prediction += coefficients[10] * pDecodedSamples[-11]; |
| 2990 | case 10: prediction += coefficients[ 9] * pDecodedSamples[-10]; |
| 2991 | case 9: prediction += coefficients[ 8] * pDecodedSamples[- 9]; |
| 2992 | case 8: prediction += coefficients[ 7] * pDecodedSamples[- 8]; |
| 2993 | case 7: prediction += coefficients[ 6] * pDecodedSamples[- 7]; |
| 2994 | case 6: prediction += coefficients[ 5] * pDecodedSamples[- 6]; |
| 2995 | case 5: prediction += coefficients[ 4] * pDecodedSamples[- 5]; |
| 2996 | case 4: prediction += coefficients[ 3] * pDecodedSamples[- 4]; |
| 2997 | case 3: prediction += coefficients[ 2] * pDecodedSamples[- 3]; |
| 2998 | case 2: prediction += coefficients[ 1] * pDecodedSamples[- 2]; |
| 2999 | case 1: prediction += coefficients[ 0] * pDecodedSamples[- 1]; |
| 3000 | } |
| 3001 | |
| 3002 | return (drflac_int32)(prediction >> shift); |
| 3003 | } |
| 3004 | |
| 3005 | static DRFLAC_INLINE drflac_int32 drflac__calculate_prediction_64(drflac_uint32 order, drflac_int32 shift, const drflac_int32* coefficients, drflac_int32* pDecodedSamples) |
| 3006 | { |
| 3007 | drflac_int64 prediction; |
| 3008 | |
| 3009 | DRFLAC_ASSERT(order <= 32); |
| 3010 | |
| 3011 | /* 64-bit version. */ |
| 3012 | |
| 3013 | /* This method is faster on the 32-bit build when compiling with VC++. See note below. */ |
| 3014 | #ifndef DRFLAC_64BIT |
| 3015 | if (order == 8) |
| 3016 | { |
| 3017 | prediction = coefficients[0] * (drflac_int64)pDecodedSamples[-1]; |
| 3018 | prediction += coefficients[1] * (drflac_int64)pDecodedSamples[-2]; |
| 3019 | prediction += coefficients[2] * (drflac_int64)pDecodedSamples[-3]; |
| 3020 | prediction += coefficients[3] * (drflac_int64)pDecodedSamples[-4]; |
| 3021 | prediction += coefficients[4] * (drflac_int64)pDecodedSamples[-5]; |
| 3022 | prediction += coefficients[5] * (drflac_int64)pDecodedSamples[-6]; |
| 3023 | prediction += coefficients[6] * (drflac_int64)pDecodedSamples[-7]; |
| 3024 | prediction += coefficients[7] * (drflac_int64)pDecodedSamples[-8]; |
| 3025 | } |
| 3026 | else if (order == 7) |
| 3027 | { |
| 3028 | prediction = coefficients[0] * (drflac_int64)pDecodedSamples[-1]; |
| 3029 | prediction += coefficients[1] * (drflac_int64)pDecodedSamples[-2]; |
| 3030 | prediction += coefficients[2] * (drflac_int64)pDecodedSamples[-3]; |
| 3031 | prediction += coefficients[3] * (drflac_int64)pDecodedSamples[-4]; |
| 3032 | prediction += coefficients[4] * (drflac_int64)pDecodedSamples[-5]; |
| 3033 | prediction += coefficients[5] * (drflac_int64)pDecodedSamples[-6]; |
| 3034 | prediction += coefficients[6] * (drflac_int64)pDecodedSamples[-7]; |
| 3035 | } |
| 3036 | else if (order == 3) |
| 3037 | { |
| 3038 | prediction = coefficients[0] * (drflac_int64)pDecodedSamples[-1]; |
| 3039 | prediction += coefficients[1] * (drflac_int64)pDecodedSamples[-2]; |
| 3040 | prediction += coefficients[2] * (drflac_int64)pDecodedSamples[-3]; |
| 3041 | } |
| 3042 | else if (order == 6) |
| 3043 | { |
| 3044 | prediction = coefficients[0] * (drflac_int64)pDecodedSamples[-1]; |
| 3045 | prediction += coefficients[1] * (drflac_int64)pDecodedSamples[-2]; |
| 3046 | prediction += coefficients[2] * (drflac_int64)pDecodedSamples[-3]; |
| 3047 | prediction += coefficients[3] * (drflac_int64)pDecodedSamples[-4]; |
| 3048 | prediction += coefficients[4] * (drflac_int64)pDecodedSamples[-5]; |
| 3049 | prediction += coefficients[5] * (drflac_int64)pDecodedSamples[-6]; |
| 3050 | } |
| 3051 | else if (order == 5) |
| 3052 | { |
| 3053 | prediction = coefficients[0] * (drflac_int64)pDecodedSamples[-1]; |
| 3054 | prediction += coefficients[1] * (drflac_int64)pDecodedSamples[-2]; |
| 3055 | prediction += coefficients[2] * (drflac_int64)pDecodedSamples[-3]; |
| 3056 | prediction += coefficients[3] * (drflac_int64)pDecodedSamples[-4]; |
| 3057 | prediction += coefficients[4] * (drflac_int64)pDecodedSamples[-5]; |
| 3058 | } |
| 3059 | else if (order == 4) |
| 3060 | { |
| 3061 | prediction = coefficients[0] * (drflac_int64)pDecodedSamples[-1]; |
| 3062 | prediction += coefficients[1] * (drflac_int64)pDecodedSamples[-2]; |
| 3063 | prediction += coefficients[2] * (drflac_int64)pDecodedSamples[-3]; |
| 3064 | prediction += coefficients[3] * (drflac_int64)pDecodedSamples[-4]; |
| 3065 | } |
| 3066 | else if (order == 12) |
| 3067 | { |
| 3068 | prediction = coefficients[0] * (drflac_int64)pDecodedSamples[-1]; |
| 3069 | prediction += coefficients[1] * (drflac_int64)pDecodedSamples[-2]; |
| 3070 | prediction += coefficients[2] * (drflac_int64)pDecodedSamples[-3]; |
| 3071 | prediction += coefficients[3] * (drflac_int64)pDecodedSamples[-4]; |
| 3072 | prediction += coefficients[4] * (drflac_int64)pDecodedSamples[-5]; |
| 3073 | prediction += coefficients[5] * (drflac_int64)pDecodedSamples[-6]; |
| 3074 | prediction += coefficients[6] * (drflac_int64)pDecodedSamples[-7]; |
| 3075 | prediction += coefficients[7] * (drflac_int64)pDecodedSamples[-8]; |
| 3076 | prediction += coefficients[8] * (drflac_int64)pDecodedSamples[-9]; |
| 3077 | prediction += coefficients[9] * (drflac_int64)pDecodedSamples[-10]; |
| 3078 | prediction += coefficients[10] * (drflac_int64)pDecodedSamples[-11]; |
| 3079 | prediction += coefficients[11] * (drflac_int64)pDecodedSamples[-12]; |
| 3080 | } |
| 3081 | else if (order == 2) |
| 3082 | { |
| 3083 | prediction = coefficients[0] * (drflac_int64)pDecodedSamples[-1]; |
| 3084 | prediction += coefficients[1] * (drflac_int64)pDecodedSamples[-2]; |
| 3085 | } |
| 3086 | else if (order == 1) |
| 3087 | { |
| 3088 | prediction = coefficients[0] * (drflac_int64)pDecodedSamples[-1]; |
| 3089 | } |
| 3090 | else if (order == 10) |
| 3091 | { |
| 3092 | prediction = coefficients[0] * (drflac_int64)pDecodedSamples[-1]; |
| 3093 | prediction += coefficients[1] * (drflac_int64)pDecodedSamples[-2]; |
| 3094 | prediction += coefficients[2] * (drflac_int64)pDecodedSamples[-3]; |
| 3095 | prediction += coefficients[3] * (drflac_int64)pDecodedSamples[-4]; |
| 3096 | prediction += coefficients[4] * (drflac_int64)pDecodedSamples[-5]; |
| 3097 | prediction += coefficients[5] * (drflac_int64)pDecodedSamples[-6]; |
| 3098 | prediction += coefficients[6] * (drflac_int64)pDecodedSamples[-7]; |
| 3099 | prediction += coefficients[7] * (drflac_int64)pDecodedSamples[-8]; |
| 3100 | prediction += coefficients[8] * (drflac_int64)pDecodedSamples[-9]; |
| 3101 | prediction += coefficients[9] * (drflac_int64)pDecodedSamples[-10]; |
| 3102 | } |
| 3103 | else if (order == 9) |
| 3104 | { |
| 3105 | prediction = coefficients[0] * (drflac_int64)pDecodedSamples[-1]; |
| 3106 | prediction += coefficients[1] * (drflac_int64)pDecodedSamples[-2]; |
| 3107 | prediction += coefficients[2] * (drflac_int64)pDecodedSamples[-3]; |
| 3108 | prediction += coefficients[3] * (drflac_int64)pDecodedSamples[-4]; |
| 3109 | prediction += coefficients[4] * (drflac_int64)pDecodedSamples[-5]; |
| 3110 | prediction += coefficients[5] * (drflac_int64)pDecodedSamples[-6]; |
| 3111 | prediction += coefficients[6] * (drflac_int64)pDecodedSamples[-7]; |
| 3112 | prediction += coefficients[7] * (drflac_int64)pDecodedSamples[-8]; |
| 3113 | prediction += coefficients[8] * (drflac_int64)pDecodedSamples[-9]; |
| 3114 | } |
| 3115 | else if (order == 11) |
| 3116 | { |
| 3117 | prediction = coefficients[0] * (drflac_int64)pDecodedSamples[-1]; |
| 3118 | prediction += coefficients[1] * (drflac_int64)pDecodedSamples[-2]; |
| 3119 | prediction += coefficients[2] * (drflac_int64)pDecodedSamples[-3]; |
| 3120 | prediction += coefficients[3] * (drflac_int64)pDecodedSamples[-4]; |
| 3121 | prediction += coefficients[4] * (drflac_int64)pDecodedSamples[-5]; |
| 3122 | prediction += coefficients[5] * (drflac_int64)pDecodedSamples[-6]; |
| 3123 | prediction += coefficients[6] * (drflac_int64)pDecodedSamples[-7]; |
| 3124 | prediction += coefficients[7] * (drflac_int64)pDecodedSamples[-8]; |
| 3125 | prediction += coefficients[8] * (drflac_int64)pDecodedSamples[-9]; |
| 3126 | prediction += coefficients[9] * (drflac_int64)pDecodedSamples[-10]; |
| 3127 | prediction += coefficients[10] * (drflac_int64)pDecodedSamples[-11]; |
| 3128 | } |
| 3129 | else |
| 3130 | { |
| 3131 | int j; |
| 3132 | |
| 3133 | prediction = 0; |
| 3134 | for (j = 0; j < (int)order; ++j) { |
| 3135 | prediction += coefficients[j] * (drflac_int64)pDecodedSamples[-j-1]; |
| 3136 | } |
| 3137 | } |
| 3138 | #endif |
| 3139 | |
| 3140 | /* |
| 3141 | VC++ optimizes this to a single jmp instruction, but only the 64-bit build. The 32-bit build generates less efficient code for some |
| 3142 | reason. The ugly version above is faster so we'll just switch between the two depending on the target platform. |
| 3143 | */ |
| 3144 | #ifdef DRFLAC_64BIT |
| 3145 | prediction = 0; |
| 3146 | switch (order) |
| 3147 | { |
| 3148 | case 32: prediction += coefficients[31] * (drflac_int64)pDecodedSamples[-32]; |
| 3149 | case 31: prediction += coefficients[30] * (drflac_int64)pDecodedSamples[-31]; |
| 3150 | case 30: prediction += coefficients[29] * (drflac_int64)pDecodedSamples[-30]; |
| 3151 | case 29: prediction += coefficients[28] * (drflac_int64)pDecodedSamples[-29]; |
| 3152 | case 28: prediction += coefficients[27] * (drflac_int64)pDecodedSamples[-28]; |
| 3153 | case 27: prediction += coefficients[26] * (drflac_int64)pDecodedSamples[-27]; |
| 3154 | case 26: prediction += coefficients[25] * (drflac_int64)pDecodedSamples[-26]; |
| 3155 | case 25: prediction += coefficients[24] * (drflac_int64)pDecodedSamples[-25]; |
| 3156 | case 24: prediction += coefficients[23] * (drflac_int64)pDecodedSamples[-24]; |
| 3157 | case 23: prediction += coefficients[22] * (drflac_int64)pDecodedSamples[-23]; |
| 3158 | case 22: prediction += coefficients[21] * (drflac_int64)pDecodedSamples[-22]; |
| 3159 | case 21: prediction += coefficients[20] * (drflac_int64)pDecodedSamples[-21]; |
| 3160 | case 20: prediction += coefficients[19] * (drflac_int64)pDecodedSamples[-20]; |
| 3161 | case 19: prediction += coefficients[18] * (drflac_int64)pDecodedSamples[-19]; |
| 3162 | case 18: prediction += coefficients[17] * (drflac_int64)pDecodedSamples[-18]; |
| 3163 | case 17: prediction += coefficients[16] * (drflac_int64)pDecodedSamples[-17]; |
| 3164 | case 16: prediction += coefficients[15] * (drflac_int64)pDecodedSamples[-16]; |
| 3165 | case 15: prediction += coefficients[14] * (drflac_int64)pDecodedSamples[-15]; |
| 3166 | case 14: prediction += coefficients[13] * (drflac_int64)pDecodedSamples[-14]; |
| 3167 | case 13: prediction += coefficients[12] * (drflac_int64)pDecodedSamples[-13]; |
| 3168 | case 12: prediction += coefficients[11] * (drflac_int64)pDecodedSamples[-12]; |
| 3169 | case 11: prediction += coefficients[10] * (drflac_int64)pDecodedSamples[-11]; |
| 3170 | case 10: prediction += coefficients[ 9] * (drflac_int64)pDecodedSamples[-10]; |
| 3171 | case 9: prediction += coefficients[ 8] * (drflac_int64)pDecodedSamples[- 9]; |
| 3172 | case 8: prediction += coefficients[ 7] * (drflac_int64)pDecodedSamples[- 8]; |
| 3173 | case 7: prediction += coefficients[ 6] * (drflac_int64)pDecodedSamples[- 7]; |
| 3174 | case 6: prediction += coefficients[ 5] * (drflac_int64)pDecodedSamples[- 6]; |
| 3175 | case 5: prediction += coefficients[ 4] * (drflac_int64)pDecodedSamples[- 5]; |
| 3176 | case 4: prediction += coefficients[ 3] * (drflac_int64)pDecodedSamples[- 4]; |
| 3177 | case 3: prediction += coefficients[ 2] * (drflac_int64)pDecodedSamples[- 3]; |
| 3178 | case 2: prediction += coefficients[ 1] * (drflac_int64)pDecodedSamples[- 2]; |
| 3179 | case 1: prediction += coefficients[ 0] * (drflac_int64)pDecodedSamples[- 1]; |
| 3180 | } |
| 3181 | #endif |
| 3182 | |
| 3183 | return (drflac_int32)(prediction >> shift); |
| 3184 | } |
| 3185 | |
| 3186 | |
| 3187 | #if 0 |
| 3188 | /* |
| 3189 | Reference implementation for reading and decoding samples with residual. This is intentionally left unoptimized for the |
| 3190 | sake of readability and should only be used as a reference. |
| 3191 | */ |
| 3192 | static drflac_bool32 drflac__decode_samples_with_residual__rice__reference(drflac_bs* bs, drflac_uint32 bitsPerSample, drflac_uint32 count, drflac_uint8 riceParam, drflac_uint32 order, drflac_int32 shift, const drflac_int32* coefficients, drflac_int32* pSamplesOut) |
| 3193 | { |
| 3194 | drflac_uint32 i; |
| 3195 | |
| 3196 | DRFLAC_ASSERT(bs != NULL); |
| 3197 | DRFLAC_ASSERT(count > 0); |
| 3198 | DRFLAC_ASSERT(pSamplesOut != NULL); |
| 3199 | |
| 3200 | for (i = 0; i < count; ++i) { |
| 3201 | drflac_uint32 zeroCounter = 0; |
| 3202 | for (;;) { |
| 3203 | drflac_uint8 bit; |
| 3204 | if (!drflac__read_uint8(bs, 1, &bit)) { |
| 3205 | return DRFLAC_FALSE; |
| 3206 | } |
| 3207 | |
| 3208 | if (bit == 0) { |
| 3209 | zeroCounter += 1; |
| 3210 | } else { |
| 3211 | break; |
| 3212 | } |
| 3213 | } |
| 3214 | |
| 3215 | drflac_uint32 decodedRice; |
| 3216 | if (riceParam > 0) { |
| 3217 | if (!drflac__read_uint32(bs, riceParam, &decodedRice)) { |
| 3218 | return DRFLAC_FALSE; |
| 3219 | } |
| 3220 | } else { |
| 3221 | decodedRice = 0; |
| 3222 | } |
| 3223 | |
| 3224 | decodedRice |= (zeroCounter << riceParam); |
| 3225 | if ((decodedRice & 0x01)) { |
| 3226 | decodedRice = ~(decodedRice >> 1); |
| 3227 | } else { |
| 3228 | decodedRice = (decodedRice >> 1); |
| 3229 | } |
| 3230 | |
| 3231 | |
| 3232 | if (bitsPerSample+shift >= 32) { |
| 3233 | pSamplesOut[i] = decodedRice + drflac__calculate_prediction_64(order, shift, coefficients, pSamplesOut + i); |
| 3234 | } else { |
| 3235 | pSamplesOut[i] = decodedRice + drflac__calculate_prediction_32(order, shift, coefficients, pSamplesOut + i); |
| 3236 | } |
| 3237 | } |
| 3238 | |
| 3239 | return DRFLAC_TRUE; |
| 3240 | } |
| 3241 | #endif |
| 3242 | |
| 3243 | #if 0 |
| 3244 | static drflac_bool32 drflac__read_rice_parts__reference(drflac_bs* bs, drflac_uint8 riceParam, drflac_uint32* pZeroCounterOut, drflac_uint32* pRiceParamPartOut) |
| 3245 | { |
| 3246 | drflac_uint32 zeroCounter = 0; |
| 3247 | drflac_uint32 decodedRice; |
| 3248 | |
| 3249 | for (;;) { |
| 3250 | drflac_uint8 bit; |
| 3251 | if (!drflac__read_uint8(bs, 1, &bit)) { |
| 3252 | return DRFLAC_FALSE; |
| 3253 | } |
| 3254 | |
| 3255 | if (bit == 0) { |
| 3256 | zeroCounter += 1; |
| 3257 | } else { |
| 3258 | break; |
| 3259 | } |
| 3260 | } |
| 3261 | |
| 3262 | if (riceParam > 0) { |
| 3263 | if (!drflac__read_uint32(bs, riceParam, &decodedRice)) { |
| 3264 | return DRFLAC_FALSE; |
| 3265 | } |
| 3266 | } else { |
| 3267 | decodedRice = 0; |
| 3268 | } |
| 3269 | |
| 3270 | *pZeroCounterOut = zeroCounter; |
| 3271 | *pRiceParamPartOut = decodedRice; |
| 3272 | return DRFLAC_TRUE; |
| 3273 | } |
| 3274 | #endif |
| 3275 | |
| 3276 | #if 0 |
| 3277 | static DRFLAC_INLINE drflac_bool32 drflac__read_rice_parts(drflac_bs* bs, drflac_uint8 riceParam, drflac_uint32* pZeroCounterOut, drflac_uint32* pRiceParamPartOut) |
| 3278 | { |
| 3279 | drflac_cache_t riceParamMask; |
| 3280 | drflac_uint32 zeroCounter; |
| 3281 | drflac_uint32 setBitOffsetPlus1; |
| 3282 | drflac_uint32 riceParamPart; |
| 3283 | drflac_uint32 riceLength; |
| 3284 | |
| 3285 | DRFLAC_ASSERT(riceParam > 0); /* <-- riceParam should never be 0. drflac__read_rice_parts__param_equals_zero() should be used instead for this case. */ |
| 3286 | |
| 3287 | riceParamMask = DRFLAC_CACHE_L1_SELECTION_MASK(riceParam); |
| 3288 | |
| 3289 | zeroCounter = 0; |
| 3290 | while (bs->cache == 0) { |
| 3291 | zeroCounter += (drflac_uint32)DRFLAC_CACHE_L1_BITS_REMAINING(bs); |
| 3292 | if (!drflac__reload_cache(bs)) { |
| 3293 | return DRFLAC_FALSE; |
| 3294 | } |
| 3295 | } |
| 3296 | |
| 3297 | setBitOffsetPlus1 = drflac__clz(bs->cache); |
| 3298 | zeroCounter += setBitOffsetPlus1; |
| 3299 | setBitOffsetPlus1 += 1; |
| 3300 | |
| 3301 | riceLength = setBitOffsetPlus1 + riceParam; |
| 3302 | if (riceLength < DRFLAC_CACHE_L1_BITS_REMAINING(bs)) { |
| 3303 | riceParamPart = (drflac_uint32)((bs->cache & (riceParamMask >> setBitOffsetPlus1)) >> DRFLAC_CACHE_L1_SELECTION_SHIFT(bs, riceLength)); |
| 3304 | |
| 3305 | bs->consumedBits += riceLength; |
| 3306 | bs->cache <<= riceLength; |
| 3307 | } else { |
| 3308 | drflac_uint32 bitCountLo; |
| 3309 | drflac_cache_t resultHi; |
| 3310 | |
| 3311 | bs->consumedBits += riceLength; |
| 3312 | bs->cache <<= setBitOffsetPlus1 & (DRFLAC_CACHE_L1_SIZE_BITS(bs)-1); /* <-- Equivalent to "if (setBitOffsetPlus1 < DRFLAC_CACHE_L1_SIZE_BITS(bs)) { bs->cache <<= setBitOffsetPlus1; }" */ |
| 3313 | |
| 3314 | /* It straddles the cached data. It will never cover more than the next chunk. We just read the number in two parts and combine them. */ |
| 3315 | bitCountLo = bs->consumedBits - DRFLAC_CACHE_L1_SIZE_BITS(bs); |
| 3316 | resultHi = DRFLAC_CACHE_L1_SELECT_AND_SHIFT(bs, riceParam); /* <-- Use DRFLAC_CACHE_L1_SELECT_AND_SHIFT_SAFE() if ever this function allows riceParam=0. */ |
| 3317 | |
| 3318 | if (bs->nextL2Line < DRFLAC_CACHE_L2_LINE_COUNT(bs)) { |
| 3319 | #ifndef DR_FLAC_NO_CRC |
| 3320 | drflac__update_crc16(bs); |
| 3321 | #endif |
| 3322 | bs->cache = drflac__be2host__cache_line(bs->cacheL2[bs->nextL2Line++]); |
| 3323 | bs->consumedBits = 0; |
| 3324 | #ifndef DR_FLAC_NO_CRC |
| 3325 | bs->crc16Cache = bs->cache; |
| 3326 | #endif |
| 3327 | } else { |
| 3328 | /* Slow path. We need to fetch more data from the client. */ |
| 3329 | if (!drflac__reload_cache(bs)) { |
| 3330 | return DRFLAC_FALSE; |
| 3331 | } |
| 3332 | } |
| 3333 | |
| 3334 | riceParamPart = (drflac_uint32)(resultHi | DRFLAC_CACHE_L1_SELECT_AND_SHIFT_SAFE(bs, bitCountLo)); |
| 3335 | |
| 3336 | bs->consumedBits += bitCountLo; |
| 3337 | bs->cache <<= bitCountLo; |
| 3338 | } |
| 3339 | |
| 3340 | pZeroCounterOut[0] = zeroCounter; |
| 3341 | pRiceParamPartOut[0] = riceParamPart; |
| 3342 | |
| 3343 | return DRFLAC_TRUE; |
| 3344 | } |
| 3345 | #endif |
| 3346 | |
| 3347 | static DRFLAC_INLINE drflac_bool32 drflac__read_rice_parts_x1(drflac_bs* bs, drflac_uint8 riceParam, drflac_uint32* pZeroCounterOut, drflac_uint32* pRiceParamPartOut) |
| 3348 | { |
| 3349 | drflac_uint32 riceParamPlus1 = riceParam + 1; |
| 3350 | /*drflac_cache_t riceParamPlus1Mask = DRFLAC_CACHE_L1_SELECTION_MASK(riceParamPlus1);*/ |
| 3351 | drflac_uint32 riceParamPlus1Shift = DRFLAC_CACHE_L1_SELECTION_SHIFT(bs, riceParamPlus1); |
| 3352 | drflac_uint32 riceParamPlus1MaxConsumedBits = DRFLAC_CACHE_L1_SIZE_BITS(bs) - riceParamPlus1; |
| 3353 | |
| 3354 | /* |
| 3355 | The idea here is to use local variables for the cache in an attempt to encourage the compiler to store them in registers. I have |
| 3356 | no idea how this will work in practice... |
| 3357 | */ |
| 3358 | drflac_cache_t bs_cache = bs->cache; |
| 3359 | drflac_uint32 bs_consumedBits = bs->consumedBits; |
| 3360 | |
| 3361 | /* The first thing to do is find the first unset bit. Most likely a bit will be set in the current cache line. */ |
| 3362 | drflac_uint32 lzcount = drflac__clz(bs_cache); |
| 3363 | if (lzcount < sizeof(bs_cache)*8) { |
| 3364 | pZeroCounterOut[0] = lzcount; |
| 3365 | |
| 3366 | /* |
| 3367 | It is most likely that the riceParam part (which comes after the zero counter) is also on this cache line. When extracting |
| 3368 | this, we include the set bit from the unary coded part because it simplifies cache management. This bit will be handled |
| 3369 | outside of this function at a higher level. |
| 3370 | */ |
| 3371 | extract_rice_param_part: |
| 3372 | bs_cache <<= lzcount; |
| 3373 | bs_consumedBits += lzcount; |
| 3374 | |
| 3375 | if (bs_consumedBits <= riceParamPlus1MaxConsumedBits) { |
| 3376 | /* Getting here means the rice parameter part is wholly contained within the current cache line. */ |
| 3377 | pRiceParamPartOut[0] = (drflac_uint32)(bs_cache >> riceParamPlus1Shift); |
| 3378 | bs_cache <<= riceParamPlus1; |
| 3379 | bs_consumedBits += riceParamPlus1; |
| 3380 | } else { |
| 3381 | drflac_uint32 riceParamPartHi; |
| 3382 | drflac_uint32 riceParamPartLo; |
| 3383 | drflac_uint32 riceParamPartLoBitCount; |
| 3384 | |
| 3385 | /* |
| 3386 | Getting here means the rice parameter part straddles the cache line. We need to read from the tail of the current cache |
| 3387 | line, reload the cache, and then combine it with the head of the next cache line. |
| 3388 | */ |
| 3389 | |
| 3390 | /* Grab the high part of the rice parameter part. */ |
| 3391 | riceParamPartHi = (drflac_uint32)(bs_cache >> riceParamPlus1Shift); |
| 3392 | |
| 3393 | /* Before reloading the cache we need to grab the size in bits of the low part. */ |
| 3394 | riceParamPartLoBitCount = bs_consumedBits - riceParamPlus1MaxConsumedBits; |
| 3395 | DRFLAC_ASSERT(riceParamPartLoBitCount > 0 && riceParamPartLoBitCount < 32); |
| 3396 | |
| 3397 | /* Now reload the cache. */ |
| 3398 | if (bs->nextL2Line < DRFLAC_CACHE_L2_LINE_COUNT(bs)) { |
| 3399 | #ifndef DR_FLAC_NO_CRC |
| 3400 | drflac__update_crc16(bs); |
| 3401 | #endif |
| 3402 | bs_cache = drflac__be2host__cache_line(bs->cacheL2[bs->nextL2Line++]); |
| 3403 | bs_consumedBits = riceParamPartLoBitCount; |
| 3404 | #ifndef DR_FLAC_NO_CRC |
| 3405 | bs->crc16Cache = bs_cache; |
| 3406 | #endif |
| 3407 | } else { |
| 3408 | /* Slow path. We need to fetch more data from the client. */ |
| 3409 | if (!drflac__reload_cache(bs)) { |
| 3410 | return DRFLAC_FALSE; |
| 3411 | } |
| 3412 | |
| 3413 | bs_cache = bs->cache; |
| 3414 | bs_consumedBits = bs->consumedBits + riceParamPartLoBitCount; |
| 3415 | } |
| 3416 | |
| 3417 | /* We should now have enough information to construct the rice parameter part. */ |
| 3418 | riceParamPartLo = (drflac_uint32)(bs_cache >> (DRFLAC_CACHE_L1_SELECTION_SHIFT(bs, riceParamPartLoBitCount))); |
| 3419 | pRiceParamPartOut[0] = riceParamPartHi | riceParamPartLo; |
| 3420 | |
| 3421 | bs_cache <<= riceParamPartLoBitCount; |
| 3422 | } |
| 3423 | } else { |
| 3424 | /* |
| 3425 | Getting here means there are no bits set on the cache line. This is a less optimal case because we just wasted a call |
| 3426 | to drflac__clz() and we need to reload the cache. |
| 3427 | */ |
| 3428 | drflac_uint32 zeroCounter = (drflac_uint32)(DRFLAC_CACHE_L1_SIZE_BITS(bs) - bs_consumedBits); |
| 3429 | for (;;) { |
| 3430 | if (bs->nextL2Line < DRFLAC_CACHE_L2_LINE_COUNT(bs)) { |
| 3431 | #ifndef DR_FLAC_NO_CRC |
| 3432 | drflac__update_crc16(bs); |
| 3433 | #endif |
| 3434 | bs_cache = drflac__be2host__cache_line(bs->cacheL2[bs->nextL2Line++]); |
| 3435 | bs_consumedBits = 0; |
| 3436 | #ifndef DR_FLAC_NO_CRC |
| 3437 | bs->crc16Cache = bs_cache; |
| 3438 | #endif |
| 3439 | } else { |
| 3440 | /* Slow path. We need to fetch more data from the client. */ |
| 3441 | if (!drflac__reload_cache(bs)) { |
| 3442 | return DRFLAC_FALSE; |
| 3443 | } |
| 3444 | |
| 3445 | bs_cache = bs->cache; |
| 3446 | bs_consumedBits = bs->consumedBits; |
| 3447 | } |
| 3448 | |
| 3449 | lzcount = drflac__clz(bs_cache); |
| 3450 | zeroCounter += lzcount; |
| 3451 | |
| 3452 | if (lzcount < sizeof(bs_cache)*8) { |
| 3453 | break; |
| 3454 | } |
| 3455 | } |
| 3456 | |
| 3457 | pZeroCounterOut[0] = zeroCounter; |
| 3458 | goto extract_rice_param_part; |
| 3459 | } |
| 3460 | |
| 3461 | /* Make sure the cache is restored at the end of it all. */ |
| 3462 | bs->cache = bs_cache; |
| 3463 | bs->consumedBits = bs_consumedBits; |
| 3464 | |
| 3465 | return DRFLAC_TRUE; |
| 3466 | } |
| 3467 | |
| 3468 | static DRFLAC_INLINE drflac_bool32 drflac__seek_rice_parts(drflac_bs* bs, drflac_uint8 riceParam) |
| 3469 | { |
| 3470 | drflac_uint32 riceParamPlus1 = riceParam + 1; |
| 3471 | drflac_uint32 riceParamPlus1MaxConsumedBits = DRFLAC_CACHE_L1_SIZE_BITS(bs) - riceParamPlus1; |
| 3472 | |
| 3473 | /* |
| 3474 | The idea here is to use local variables for the cache in an attempt to encourage the compiler to store them in registers. I have |
| 3475 | no idea how this will work in practice... |
| 3476 | */ |
| 3477 | drflac_cache_t bs_cache = bs->cache; |
| 3478 | drflac_uint32 bs_consumedBits = bs->consumedBits; |
| 3479 | |
| 3480 | /* The first thing to do is find the first unset bit. Most likely a bit will be set in the current cache line. */ |
| 3481 | drflac_uint32 lzcount = drflac__clz(bs_cache); |
| 3482 | if (lzcount < sizeof(bs_cache)*8) { |
| 3483 | /* |
| 3484 | It is most likely that the riceParam part (which comes after the zero counter) is also on this cache line. When extracting |
| 3485 | this, we include the set bit from the unary coded part because it simplifies cache management. This bit will be handled |
| 3486 | outside of this function at a higher level. |
| 3487 | */ |
| 3488 | extract_rice_param_part: |
| 3489 | bs_cache <<= lzcount; |
| 3490 | bs_consumedBits += lzcount; |
| 3491 | |
| 3492 | if (bs_consumedBits <= riceParamPlus1MaxConsumedBits) { |
| 3493 | /* Getting here means the rice parameter part is wholly contained within the current cache line. */ |
| 3494 | bs_cache <<= riceParamPlus1; |
| 3495 | bs_consumedBits += riceParamPlus1; |
| 3496 | } else { |
| 3497 | /* |
| 3498 | Getting here means the rice parameter part straddles the cache line. We need to read from the tail of the current cache |
| 3499 | line, reload the cache, and then combine it with the head of the next cache line. |
| 3500 | */ |
| 3501 | |
| 3502 | /* Before reloading the cache we need to grab the size in bits of the low part. */ |
| 3503 | drflac_uint32 riceParamPartLoBitCount = bs_consumedBits - riceParamPlus1MaxConsumedBits; |
| 3504 | DRFLAC_ASSERT(riceParamPartLoBitCount > 0 && riceParamPartLoBitCount < 32); |
| 3505 | |
| 3506 | /* Now reload the cache. */ |
| 3507 | if (bs->nextL2Line < DRFLAC_CACHE_L2_LINE_COUNT(bs)) { |
| 3508 | #ifndef DR_FLAC_NO_CRC |
| 3509 | drflac__update_crc16(bs); |
| 3510 | #endif |
| 3511 | bs_cache = drflac__be2host__cache_line(bs->cacheL2[bs->nextL2Line++]); |
| 3512 | bs_consumedBits = riceParamPartLoBitCount; |
| 3513 | #ifndef DR_FLAC_NO_CRC |
| 3514 | bs->crc16Cache = bs_cache; |
| 3515 | #endif |
| 3516 | } else { |
| 3517 | /* Slow path. We need to fetch more data from the client. */ |
| 3518 | if (!drflac__reload_cache(bs)) { |
| 3519 | return DRFLAC_FALSE; |
| 3520 | } |
| 3521 | |
| 3522 | bs_cache = bs->cache; |
| 3523 | bs_consumedBits = bs->consumedBits + riceParamPartLoBitCount; |
| 3524 | } |
| 3525 | |
| 3526 | bs_cache <<= riceParamPartLoBitCount; |
| 3527 | } |
| 3528 | } else { |
| 3529 | /* |
| 3530 | Getting here means there are no bits set on the cache line. This is a less optimal case because we just wasted a call |
| 3531 | to drflac__clz() and we need to reload the cache. |
| 3532 | */ |
| 3533 | for (;;) { |
| 3534 | if (bs->nextL2Line < DRFLAC_CACHE_L2_LINE_COUNT(bs)) { |
| 3535 | #ifndef DR_FLAC_NO_CRC |
| 3536 | drflac__update_crc16(bs); |
| 3537 | #endif |
| 3538 | bs_cache = drflac__be2host__cache_line(bs->cacheL2[bs->nextL2Line++]); |
| 3539 | bs_consumedBits = 0; |
| 3540 | #ifndef DR_FLAC_NO_CRC |
| 3541 | bs->crc16Cache = bs_cache; |
| 3542 | #endif |
| 3543 | } else { |
| 3544 | /* Slow path. We need to fetch more data from the client. */ |
| 3545 | if (!drflac__reload_cache(bs)) { |
| 3546 | return DRFLAC_FALSE; |
| 3547 | } |
| 3548 | |
| 3549 | bs_cache = bs->cache; |
| 3550 | bs_consumedBits = bs->consumedBits; |
| 3551 | } |
| 3552 | |
| 3553 | lzcount = drflac__clz(bs_cache); |
| 3554 | if (lzcount < sizeof(bs_cache)*8) { |
| 3555 | break; |
| 3556 | } |
| 3557 | } |
| 3558 | |
| 3559 | goto extract_rice_param_part; |
| 3560 | } |
| 3561 | |
| 3562 | /* Make sure the cache is restored at the end of it all. */ |
| 3563 | bs->cache = bs_cache; |
| 3564 | bs->consumedBits = bs_consumedBits; |
| 3565 | |
| 3566 | return DRFLAC_TRUE; |
| 3567 | } |
| 3568 | |
| 3569 | |
| 3570 | static drflac_bool32 drflac__decode_samples_with_residual__rice__scalar_zeroorder(drflac_bs* bs, drflac_uint32 bitsPerSample, drflac_uint32 count, drflac_uint8 riceParam, drflac_uint32 order, drflac_int32 shift, const drflac_int32* coefficients, drflac_int32* pSamplesOut) |
| 3571 | { |
| 3572 | drflac_uint32 t[2] = {0x00000000, 0xFFFFFFFF}; |
| 3573 | drflac_uint32 zeroCountPart0; |
| 3574 | drflac_uint32 riceParamPart0; |
| 3575 | drflac_uint32 riceParamMask; |
| 3576 | drflac_uint32 i; |
| 3577 | |
| 3578 | DRFLAC_ASSERT(bs != NULL); |
| 3579 | DRFLAC_ASSERT(count > 0); |
| 3580 | DRFLAC_ASSERT(pSamplesOut != NULL); |
| 3581 | |
| 3582 | (void)bitsPerSample; |
| 3583 | (void)order; |
| 3584 | (void)shift; |
| 3585 | (void)coefficients; |
| 3586 | |
| 3587 | riceParamMask = (drflac_uint32)~((~0UL) << riceParam); |
| 3588 | |
| 3589 | i = 0; |
| 3590 | while (i < count) { |
| 3591 | /* Rice extraction. */ |
| 3592 | if (!drflac__read_rice_parts_x1(bs, riceParam, &zeroCountPart0, &riceParamPart0)) { |
| 3593 | return DRFLAC_FALSE; |
| 3594 | } |
| 3595 | |
| 3596 | /* Rice reconstruction. */ |
| 3597 | riceParamPart0 &= riceParamMask; |
| 3598 | riceParamPart0 |= (zeroCountPart0 << riceParam); |
| 3599 | riceParamPart0 = (riceParamPart0 >> 1) ^ t[riceParamPart0 & 0x01]; |
| 3600 | |
| 3601 | pSamplesOut[i] = riceParamPart0; |
| 3602 | |
| 3603 | i += 1; |
| 3604 | } |
| 3605 | |
| 3606 | return DRFLAC_TRUE; |
| 3607 | } |
| 3608 | |
| 3609 | static drflac_bool32 drflac__decode_samples_with_residual__rice__scalar(drflac_bs* bs, drflac_uint32 bitsPerSample, drflac_uint32 count, drflac_uint8 riceParam, drflac_uint32 order, drflac_int32 shift, const drflac_int32* coefficients, drflac_int32* pSamplesOut) |
| 3610 | { |
| 3611 | drflac_uint32 t[2] = {0x00000000, 0xFFFFFFFF}; |
| 3612 | drflac_uint32 zeroCountPart0 = 0; |
| 3613 | drflac_uint32 zeroCountPart1 = 0; |
| 3614 | drflac_uint32 zeroCountPart2 = 0; |
| 3615 | drflac_uint32 zeroCountPart3 = 0; |
| 3616 | drflac_uint32 riceParamPart0 = 0; |
| 3617 | drflac_uint32 riceParamPart1 = 0; |
| 3618 | drflac_uint32 riceParamPart2 = 0; |
| 3619 | drflac_uint32 riceParamPart3 = 0; |
| 3620 | drflac_uint32 riceParamMask; |
| 3621 | const drflac_int32* pSamplesOutEnd; |
| 3622 | drflac_uint32 i; |
| 3623 | |
| 3624 | DRFLAC_ASSERT(bs != NULL); |
| 3625 | DRFLAC_ASSERT(count > 0); |
| 3626 | DRFLAC_ASSERT(pSamplesOut != NULL); |
| 3627 | |
| 3628 | if (order == 0) { |
| 3629 | return drflac__decode_samples_with_residual__rice__scalar_zeroorder(bs, bitsPerSample, count, riceParam, order, shift, coefficients, pSamplesOut); |
| 3630 | } |
| 3631 | |
| 3632 | riceParamMask = (drflac_uint32)~((~0UL) << riceParam); |
| 3633 | pSamplesOutEnd = pSamplesOut + (count & ~3); |
| 3634 | |
| 3635 | if (bitsPerSample+shift > 32) { |
| 3636 | while (pSamplesOut < pSamplesOutEnd) { |
| 3637 | /* |
| 3638 | Rice extraction. It's faster to do this one at a time against local variables than it is to use the x4 version |
| 3639 | against an array. Not sure why, but perhaps it's making more efficient use of registers? |
| 3640 | */ |
| 3641 | if (!drflac__read_rice_parts_x1(bs, riceParam, &zeroCountPart0, &riceParamPart0) || |
| 3642 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountPart1, &riceParamPart1) || |
| 3643 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountPart2, &riceParamPart2) || |
| 3644 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountPart3, &riceParamPart3)) { |
| 3645 | return DRFLAC_FALSE; |
| 3646 | } |
| 3647 | |
| 3648 | riceParamPart0 &= riceParamMask; |
| 3649 | riceParamPart1 &= riceParamMask; |
| 3650 | riceParamPart2 &= riceParamMask; |
| 3651 | riceParamPart3 &= riceParamMask; |
| 3652 | |
| 3653 | riceParamPart0 |= (zeroCountPart0 << riceParam); |
| 3654 | riceParamPart1 |= (zeroCountPart1 << riceParam); |
| 3655 | riceParamPart2 |= (zeroCountPart2 << riceParam); |
| 3656 | riceParamPart3 |= (zeroCountPart3 << riceParam); |
| 3657 | |
| 3658 | riceParamPart0 = (riceParamPart0 >> 1) ^ t[riceParamPart0 & 0x01]; |
| 3659 | riceParamPart1 = (riceParamPart1 >> 1) ^ t[riceParamPart1 & 0x01]; |
| 3660 | riceParamPart2 = (riceParamPart2 >> 1) ^ t[riceParamPart2 & 0x01]; |
| 3661 | riceParamPart3 = (riceParamPart3 >> 1) ^ t[riceParamPart3 & 0x01]; |
| 3662 | |
| 3663 | pSamplesOut[0] = riceParamPart0 + drflac__calculate_prediction_64(order, shift, coefficients, pSamplesOut + 0); |
| 3664 | pSamplesOut[1] = riceParamPart1 + drflac__calculate_prediction_64(order, shift, coefficients, pSamplesOut + 1); |
| 3665 | pSamplesOut[2] = riceParamPart2 + drflac__calculate_prediction_64(order, shift, coefficients, pSamplesOut + 2); |
| 3666 | pSamplesOut[3] = riceParamPart3 + drflac__calculate_prediction_64(order, shift, coefficients, pSamplesOut + 3); |
| 3667 | |
| 3668 | pSamplesOut += 4; |
| 3669 | } |
| 3670 | } else { |
| 3671 | while (pSamplesOut < pSamplesOutEnd) { |
| 3672 | if (!drflac__read_rice_parts_x1(bs, riceParam, &zeroCountPart0, &riceParamPart0) || |
| 3673 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountPart1, &riceParamPart1) || |
| 3674 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountPart2, &riceParamPart2) || |
| 3675 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountPart3, &riceParamPart3)) { |
| 3676 | return DRFLAC_FALSE; |
| 3677 | } |
| 3678 | |
| 3679 | riceParamPart0 &= riceParamMask; |
| 3680 | riceParamPart1 &= riceParamMask; |
| 3681 | riceParamPart2 &= riceParamMask; |
| 3682 | riceParamPart3 &= riceParamMask; |
| 3683 | |
| 3684 | riceParamPart0 |= (zeroCountPart0 << riceParam); |
| 3685 | riceParamPart1 |= (zeroCountPart1 << riceParam); |
| 3686 | riceParamPart2 |= (zeroCountPart2 << riceParam); |
| 3687 | riceParamPart3 |= (zeroCountPart3 << riceParam); |
| 3688 | |
| 3689 | riceParamPart0 = (riceParamPart0 >> 1) ^ t[riceParamPart0 & 0x01]; |
| 3690 | riceParamPart1 = (riceParamPart1 >> 1) ^ t[riceParamPart1 & 0x01]; |
| 3691 | riceParamPart2 = (riceParamPart2 >> 1) ^ t[riceParamPart2 & 0x01]; |
| 3692 | riceParamPart3 = (riceParamPart3 >> 1) ^ t[riceParamPart3 & 0x01]; |
| 3693 | |
| 3694 | pSamplesOut[0] = riceParamPart0 + drflac__calculate_prediction_32(order, shift, coefficients, pSamplesOut + 0); |
| 3695 | pSamplesOut[1] = riceParamPart1 + drflac__calculate_prediction_32(order, shift, coefficients, pSamplesOut + 1); |
| 3696 | pSamplesOut[2] = riceParamPart2 + drflac__calculate_prediction_32(order, shift, coefficients, pSamplesOut + 2); |
| 3697 | pSamplesOut[3] = riceParamPart3 + drflac__calculate_prediction_32(order, shift, coefficients, pSamplesOut + 3); |
| 3698 | |
| 3699 | pSamplesOut += 4; |
| 3700 | } |
| 3701 | } |
| 3702 | |
| 3703 | i = (count & ~3); |
| 3704 | while (i < count) { |
| 3705 | /* Rice extraction. */ |
| 3706 | if (!drflac__read_rice_parts_x1(bs, riceParam, &zeroCountPart0, &riceParamPart0)) { |
| 3707 | return DRFLAC_FALSE; |
| 3708 | } |
| 3709 | |
| 3710 | /* Rice reconstruction. */ |
| 3711 | riceParamPart0 &= riceParamMask; |
| 3712 | riceParamPart0 |= (zeroCountPart0 << riceParam); |
| 3713 | riceParamPart0 = (riceParamPart0 >> 1) ^ t[riceParamPart0 & 0x01]; |
| 3714 | /*riceParamPart0 = (riceParamPart0 >> 1) ^ (~(riceParamPart0 & 0x01) + 1);*/ |
| 3715 | |
| 3716 | /* Sample reconstruction. */ |
| 3717 | if (bitsPerSample+shift > 32) { |
| 3718 | pSamplesOut[0] = riceParamPart0 + drflac__calculate_prediction_64(order, shift, coefficients, pSamplesOut + 0); |
| 3719 | } else { |
| 3720 | pSamplesOut[0] = riceParamPart0 + drflac__calculate_prediction_32(order, shift, coefficients, pSamplesOut + 0); |
| 3721 | } |
| 3722 | |
| 3723 | i += 1; |
| 3724 | pSamplesOut += 1; |
| 3725 | } |
| 3726 | |
| 3727 | return DRFLAC_TRUE; |
| 3728 | } |
| 3729 | |
| 3730 | #if defined(DRFLAC_SUPPORT_SSE2) |
| 3731 | static DRFLAC_INLINE __m128i drflac__mm_packs_interleaved_epi32(__m128i a, __m128i b) |
| 3732 | { |
| 3733 | __m128i r; |
| 3734 | |
| 3735 | /* Pack. */ |
| 3736 | r = _mm_packs_epi32(a, b); |
| 3737 | |
| 3738 | /* a3a2 a1a0 b3b2 b1b0 -> a3a2 b3b2 a1a0 b1b0 */ |
| 3739 | r = _mm_shuffle_epi32(r, _MM_SHUFFLE(3, 1, 2, 0)); |
| 3740 | |
| 3741 | /* a3a2 b3b2 a1a0 b1b0 -> a3b3 a2b2 a1b1 a0b0 */ |
| 3742 | r = _mm_shufflehi_epi16(r, _MM_SHUFFLE(3, 1, 2, 0)); |
| 3743 | r = _mm_shufflelo_epi16(r, _MM_SHUFFLE(3, 1, 2, 0)); |
| 3744 | |
| 3745 | return r; |
| 3746 | } |
| 3747 | #endif |
| 3748 | |
| 3749 | #if defined(DRFLAC_SUPPORT_SSE41) |
| 3750 | static DRFLAC_INLINE __m128i drflac__mm_not_si128(__m128i a) |
| 3751 | { |
| 3752 | return _mm_xor_si128(a, _mm_cmpeq_epi32(_mm_setzero_si128(), _mm_setzero_si128())); |
| 3753 | } |
| 3754 | |
| 3755 | static DRFLAC_INLINE __m128i drflac__mm_hadd_epi32(__m128i x) |
| 3756 | { |
| 3757 | __m128i x64 = _mm_add_epi32(x, _mm_shuffle_epi32(x, _MM_SHUFFLE(1, 0, 3, 2))); |
| 3758 | __m128i x32 = _mm_shufflelo_epi16(x64, _MM_SHUFFLE(1, 0, 3, 2)); |
| 3759 | return _mm_add_epi32(x64, x32); |
| 3760 | } |
| 3761 | |
| 3762 | static DRFLAC_INLINE __m128i drflac__mm_hadd_epi64(__m128i x) |
| 3763 | { |
| 3764 | return _mm_add_epi64(x, _mm_shuffle_epi32(x, _MM_SHUFFLE(1, 0, 3, 2))); |
| 3765 | } |
| 3766 | |
| 3767 | static DRFLAC_INLINE __m128i drflac__mm_srai_epi64(__m128i x, int count) |
| 3768 | { |
| 3769 | /* |
| 3770 | To simplify this we are assuming count < 32. This restriction allows us to work on a low side and a high side. The low side |
| 3771 | is shifted with zero bits, whereas the right side is shifted with sign bits. |
| 3772 | */ |
| 3773 | __m128i lo = _mm_srli_epi64(x, count); |
| 3774 | __m128i hi = _mm_srai_epi32(x, count); |
| 3775 | |
| 3776 | hi = _mm_and_si128(hi, _mm_set_epi32(0xFFFFFFFF, 0, 0xFFFFFFFF, 0)); /* The high part needs to have the low part cleared. */ |
| 3777 | |
| 3778 | return _mm_or_si128(lo, hi); |
| 3779 | } |
| 3780 | |
| 3781 | static drflac_bool32 drflac__decode_samples_with_residual__rice__sse41_32(drflac_bs* bs, drflac_uint32 count, drflac_uint8 riceParam, drflac_uint32 order, drflac_int32 shift, const drflac_int32* coefficients, drflac_int32* pSamplesOut) |
| 3782 | { |
| 3783 | int i; |
| 3784 | drflac_uint32 riceParamMask; |
| 3785 | drflac_int32* pDecodedSamples = pSamplesOut; |
| 3786 | drflac_int32* pDecodedSamplesEnd = pSamplesOut + (count & ~3); |
| 3787 | drflac_uint32 zeroCountParts0 = 0; |
| 3788 | drflac_uint32 zeroCountParts1 = 0; |
| 3789 | drflac_uint32 zeroCountParts2 = 0; |
| 3790 | drflac_uint32 zeroCountParts3 = 0; |
| 3791 | drflac_uint32 riceParamParts0 = 0; |
| 3792 | drflac_uint32 riceParamParts1 = 0; |
| 3793 | drflac_uint32 riceParamParts2 = 0; |
| 3794 | drflac_uint32 riceParamParts3 = 0; |
| 3795 | __m128i coefficients128_0; |
| 3796 | __m128i coefficients128_4; |
| 3797 | __m128i coefficients128_8; |
| 3798 | __m128i samples128_0; |
| 3799 | __m128i samples128_4; |
| 3800 | __m128i samples128_8; |
| 3801 | __m128i riceParamMask128; |
| 3802 | |
| 3803 | const drflac_uint32 t[2] = {0x00000000, 0xFFFFFFFF}; |
| 3804 | |
| 3805 | riceParamMask = (drflac_uint32)~((~0UL) << riceParam); |
| 3806 | riceParamMask128 = _mm_set1_epi32(riceParamMask); |
| 3807 | |
| 3808 | /* Pre-load. */ |
| 3809 | coefficients128_0 = _mm_setzero_si128(); |
| 3810 | coefficients128_4 = _mm_setzero_si128(); |
| 3811 | coefficients128_8 = _mm_setzero_si128(); |
| 3812 | |
| 3813 | samples128_0 = _mm_setzero_si128(); |
| 3814 | samples128_4 = _mm_setzero_si128(); |
| 3815 | samples128_8 = _mm_setzero_si128(); |
| 3816 | |
| 3817 | /* |
| 3818 | Pre-loading the coefficients and prior samples is annoying because we need to ensure we don't try reading more than |
| 3819 | what's available in the input buffers. It would be convenient to use a fall-through switch to do this, but this results |
| 3820 | in strict aliasing warnings with GCC. To work around this I'm just doing something hacky. This feels a bit convoluted |
| 3821 | so I think there's opportunity for this to be simplified. |
| 3822 | */ |
| 3823 | #if 1 |
| 3824 | { |
| 3825 | int runningOrder = order; |
| 3826 | |
| 3827 | /* 0 - 3. */ |
| 3828 | if (runningOrder >= 4) { |
| 3829 | coefficients128_0 = _mm_loadu_si128((const __m128i*)(coefficients + 0)); |
| 3830 | samples128_0 = _mm_loadu_si128((const __m128i*)(pSamplesOut - 4)); |
| 3831 | runningOrder -= 4; |
| 3832 | } else { |
| 3833 | switch (runningOrder) { |
| 3834 | case 3: coefficients128_0 = _mm_set_epi32(0, coefficients[2], coefficients[1], coefficients[0]); samples128_0 = _mm_set_epi32(pSamplesOut[-1], pSamplesOut[-2], pSamplesOut[-3], 0); break; |
| 3835 | case 2: coefficients128_0 = _mm_set_epi32(0, 0, coefficients[1], coefficients[0]); samples128_0 = _mm_set_epi32(pSamplesOut[-1], pSamplesOut[-2], 0, 0); break; |
| 3836 | case 1: coefficients128_0 = _mm_set_epi32(0, 0, 0, coefficients[0]); samples128_0 = _mm_set_epi32(pSamplesOut[-1], 0, 0, 0); break; |
| 3837 | } |
| 3838 | runningOrder = 0; |
| 3839 | } |
| 3840 | |
| 3841 | /* 4 - 7 */ |
| 3842 | if (runningOrder >= 4) { |
| 3843 | coefficients128_4 = _mm_loadu_si128((const __m128i*)(coefficients + 4)); |
| 3844 | samples128_4 = _mm_loadu_si128((const __m128i*)(pSamplesOut - 8)); |
| 3845 | runningOrder -= 4; |
| 3846 | } else { |
| 3847 | switch (runningOrder) { |
| 3848 | case 3: coefficients128_4 = _mm_set_epi32(0, coefficients[6], coefficients[5], coefficients[4]); samples128_4 = _mm_set_epi32(pSamplesOut[-5], pSamplesOut[-6], pSamplesOut[-7], 0); break; |
| 3849 | case 2: coefficients128_4 = _mm_set_epi32(0, 0, coefficients[5], coefficients[4]); samples128_4 = _mm_set_epi32(pSamplesOut[-5], pSamplesOut[-6], 0, 0); break; |
| 3850 | case 1: coefficients128_4 = _mm_set_epi32(0, 0, 0, coefficients[4]); samples128_4 = _mm_set_epi32(pSamplesOut[-5], 0, 0, 0); break; |
| 3851 | } |
| 3852 | runningOrder = 0; |
| 3853 | } |
| 3854 | |
| 3855 | /* 8 - 11 */ |
| 3856 | if (runningOrder == 4) { |
| 3857 | coefficients128_8 = _mm_loadu_si128((const __m128i*)(coefficients + 8)); |
| 3858 | samples128_8 = _mm_loadu_si128((const __m128i*)(pSamplesOut - 12)); |
| 3859 | runningOrder -= 4; |
| 3860 | } else { |
| 3861 | switch (runningOrder) { |
| 3862 | case 3: coefficients128_8 = _mm_set_epi32(0, coefficients[10], coefficients[9], coefficients[8]); samples128_8 = _mm_set_epi32(pSamplesOut[-9], pSamplesOut[-10], pSamplesOut[-11], 0); break; |
| 3863 | case 2: coefficients128_8 = _mm_set_epi32(0, 0, coefficients[9], coefficients[8]); samples128_8 = _mm_set_epi32(pSamplesOut[-9], pSamplesOut[-10], 0, 0); break; |
| 3864 | case 1: coefficients128_8 = _mm_set_epi32(0, 0, 0, coefficients[8]); samples128_8 = _mm_set_epi32(pSamplesOut[-9], 0, 0, 0); break; |
| 3865 | } |
| 3866 | runningOrder = 0; |
| 3867 | } |
| 3868 | |
| 3869 | /* Coefficients need to be shuffled for our streaming algorithm below to work. Samples are already in the correct order from the loading routine above. */ |
| 3870 | coefficients128_0 = _mm_shuffle_epi32(coefficients128_0, _MM_SHUFFLE(0, 1, 2, 3)); |
| 3871 | coefficients128_4 = _mm_shuffle_epi32(coefficients128_4, _MM_SHUFFLE(0, 1, 2, 3)); |
| 3872 | coefficients128_8 = _mm_shuffle_epi32(coefficients128_8, _MM_SHUFFLE(0, 1, 2, 3)); |
| 3873 | } |
| 3874 | #else |
| 3875 | /* This causes strict-aliasing warnings with GCC. */ |
| 3876 | switch (order) |
| 3877 | { |
| 3878 | case 12: ((drflac_int32*)&coefficients128_8)[0] = coefficients[11]; ((drflac_int32*)&samples128_8)[0] = pDecodedSamples[-12]; |
| 3879 | case 11: ((drflac_int32*)&coefficients128_8)[1] = coefficients[10]; ((drflac_int32*)&samples128_8)[1] = pDecodedSamples[-11]; |
| 3880 | case 10: ((drflac_int32*)&coefficients128_8)[2] = coefficients[ 9]; ((drflac_int32*)&samples128_8)[2] = pDecodedSamples[-10]; |
| 3881 | case 9: ((drflac_int32*)&coefficients128_8)[3] = coefficients[ 8]; ((drflac_int32*)&samples128_8)[3] = pDecodedSamples[- 9]; |
| 3882 | case 8: ((drflac_int32*)&coefficients128_4)[0] = coefficients[ 7]; ((drflac_int32*)&samples128_4)[0] = pDecodedSamples[- 8]; |
| 3883 | case 7: ((drflac_int32*)&coefficients128_4)[1] = coefficients[ 6]; ((drflac_int32*)&samples128_4)[1] = pDecodedSamples[- 7]; |
| 3884 | case 6: ((drflac_int32*)&coefficients128_4)[2] = coefficients[ 5]; ((drflac_int32*)&samples128_4)[2] = pDecodedSamples[- 6]; |
| 3885 | case 5: ((drflac_int32*)&coefficients128_4)[3] = coefficients[ 4]; ((drflac_int32*)&samples128_4)[3] = pDecodedSamples[- 5]; |
| 3886 | case 4: ((drflac_int32*)&coefficients128_0)[0] = coefficients[ 3]; ((drflac_int32*)&samples128_0)[0] = pDecodedSamples[- 4]; |
| 3887 | case 3: ((drflac_int32*)&coefficients128_0)[1] = coefficients[ 2]; ((drflac_int32*)&samples128_0)[1] = pDecodedSamples[- 3]; |
| 3888 | case 2: ((drflac_int32*)&coefficients128_0)[2] = coefficients[ 1]; ((drflac_int32*)&samples128_0)[2] = pDecodedSamples[- 2]; |
| 3889 | case 1: ((drflac_int32*)&coefficients128_0)[3] = coefficients[ 0]; ((drflac_int32*)&samples128_0)[3] = pDecodedSamples[- 1]; |
| 3890 | } |
| 3891 | #endif |
| 3892 | |
| 3893 | /* For this version we are doing one sample at a time. */ |
| 3894 | while (pDecodedSamples < pDecodedSamplesEnd) { |
| 3895 | __m128i prediction128; |
| 3896 | __m128i zeroCountPart128; |
| 3897 | __m128i riceParamPart128; |
| 3898 | |
| 3899 | if (!drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts0, &riceParamParts0) || |
| 3900 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts1, &riceParamParts1) || |
| 3901 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts2, &riceParamParts2) || |
| 3902 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts3, &riceParamParts3)) { |
| 3903 | return DRFLAC_FALSE; |
| 3904 | } |
| 3905 | |
| 3906 | zeroCountPart128 = _mm_set_epi32(zeroCountParts3, zeroCountParts2, zeroCountParts1, zeroCountParts0); |
| 3907 | riceParamPart128 = _mm_set_epi32(riceParamParts3, riceParamParts2, riceParamParts1, riceParamParts0); |
| 3908 | |
| 3909 | riceParamPart128 = _mm_and_si128(riceParamPart128, riceParamMask128); |
| 3910 | riceParamPart128 = _mm_or_si128(riceParamPart128, _mm_slli_epi32(zeroCountPart128, riceParam)); |
| 3911 | riceParamPart128 = _mm_xor_si128(_mm_srli_epi32(riceParamPart128, 1), _mm_add_epi32(drflac__mm_not_si128(_mm_and_si128(riceParamPart128, _mm_set1_epi32(0x01))), _mm_set1_epi32(0x01))); /* <-- SSE2 compatible */ |
| 3912 | /*riceParamPart128 = _mm_xor_si128(_mm_srli_epi32(riceParamPart128, 1), _mm_mullo_epi32(_mm_and_si128(riceParamPart128, _mm_set1_epi32(0x01)), _mm_set1_epi32(0xFFFFFFFF)));*/ /* <-- Only supported from SSE4.1 and is slower in my testing... */ |
| 3913 | |
| 3914 | if (order <= 4) { |
| 3915 | for (i = 0; i < 4; i += 1) { |
| 3916 | prediction128 = _mm_mullo_epi32(coefficients128_0, samples128_0); |
| 3917 | |
| 3918 | /* Horizontal add and shift. */ |
| 3919 | prediction128 = drflac__mm_hadd_epi32(prediction128); |
| 3920 | prediction128 = _mm_srai_epi32(prediction128, shift); |
| 3921 | prediction128 = _mm_add_epi32(riceParamPart128, prediction128); |
| 3922 | |
| 3923 | samples128_0 = _mm_alignr_epi8(prediction128, samples128_0, 4); |
| 3924 | riceParamPart128 = _mm_alignr_epi8(_mm_setzero_si128(), riceParamPart128, 4); |
| 3925 | } |
| 3926 | } else if (order <= 8) { |
| 3927 | for (i = 0; i < 4; i += 1) { |
| 3928 | prediction128 = _mm_mullo_epi32(coefficients128_4, samples128_4); |
| 3929 | prediction128 = _mm_add_epi32(prediction128, _mm_mullo_epi32(coefficients128_0, samples128_0)); |
| 3930 | |
| 3931 | /* Horizontal add and shift. */ |
| 3932 | prediction128 = drflac__mm_hadd_epi32(prediction128); |
| 3933 | prediction128 = _mm_srai_epi32(prediction128, shift); |
| 3934 | prediction128 = _mm_add_epi32(riceParamPart128, prediction128); |
| 3935 | |
| 3936 | samples128_4 = _mm_alignr_epi8(samples128_0, samples128_4, 4); |
| 3937 | samples128_0 = _mm_alignr_epi8(prediction128, samples128_0, 4); |
| 3938 | riceParamPart128 = _mm_alignr_epi8(_mm_setzero_si128(), riceParamPart128, 4); |
| 3939 | } |
| 3940 | } else { |
| 3941 | for (i = 0; i < 4; i += 1) { |
| 3942 | prediction128 = _mm_mullo_epi32(coefficients128_8, samples128_8); |
| 3943 | prediction128 = _mm_add_epi32(prediction128, _mm_mullo_epi32(coefficients128_4, samples128_4)); |
| 3944 | prediction128 = _mm_add_epi32(prediction128, _mm_mullo_epi32(coefficients128_0, samples128_0)); |
| 3945 | |
| 3946 | /* Horizontal add and shift. */ |
| 3947 | prediction128 = drflac__mm_hadd_epi32(prediction128); |
| 3948 | prediction128 = _mm_srai_epi32(prediction128, shift); |
| 3949 | prediction128 = _mm_add_epi32(riceParamPart128, prediction128); |
| 3950 | |
| 3951 | samples128_8 = _mm_alignr_epi8(samples128_4, samples128_8, 4); |
| 3952 | samples128_4 = _mm_alignr_epi8(samples128_0, samples128_4, 4); |
| 3953 | samples128_0 = _mm_alignr_epi8(prediction128, samples128_0, 4); |
| 3954 | riceParamPart128 = _mm_alignr_epi8(_mm_setzero_si128(), riceParamPart128, 4); |
| 3955 | } |
| 3956 | } |
| 3957 | |
| 3958 | /* We store samples in groups of 4. */ |
| 3959 | _mm_storeu_si128((__m128i*)pDecodedSamples, samples128_0); |
| 3960 | pDecodedSamples += 4; |
| 3961 | } |
| 3962 | |
| 3963 | /* Make sure we process the last few samples. */ |
| 3964 | i = (count & ~3); |
| 3965 | while (i < (int)count) { |
| 3966 | /* Rice extraction. */ |
| 3967 | if (!drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts0, &riceParamParts0)) { |
| 3968 | return DRFLAC_FALSE; |
| 3969 | } |
| 3970 | |
| 3971 | /* Rice reconstruction. */ |
| 3972 | riceParamParts0 &= riceParamMask; |
| 3973 | riceParamParts0 |= (zeroCountParts0 << riceParam); |
| 3974 | riceParamParts0 = (riceParamParts0 >> 1) ^ t[riceParamParts0 & 0x01]; |
| 3975 | |
| 3976 | /* Sample reconstruction. */ |
| 3977 | pDecodedSamples[0] = riceParamParts0 + drflac__calculate_prediction_32(order, shift, coefficients, pDecodedSamples); |
| 3978 | |
| 3979 | i += 1; |
| 3980 | pDecodedSamples += 1; |
| 3981 | } |
| 3982 | |
| 3983 | return DRFLAC_TRUE; |
| 3984 | } |
| 3985 | |
| 3986 | static drflac_bool32 drflac__decode_samples_with_residual__rice__sse41_64(drflac_bs* bs, drflac_uint32 count, drflac_uint8 riceParam, drflac_uint32 order, drflac_int32 shift, const drflac_int32* coefficients, drflac_int32* pSamplesOut) |
| 3987 | { |
| 3988 | int i; |
| 3989 | drflac_uint32 riceParamMask; |
| 3990 | drflac_int32* pDecodedSamples = pSamplesOut; |
| 3991 | drflac_int32* pDecodedSamplesEnd = pSamplesOut + (count & ~3); |
| 3992 | drflac_uint32 zeroCountParts0 = 0; |
| 3993 | drflac_uint32 zeroCountParts1 = 0; |
| 3994 | drflac_uint32 zeroCountParts2 = 0; |
| 3995 | drflac_uint32 zeroCountParts3 = 0; |
| 3996 | drflac_uint32 riceParamParts0 = 0; |
| 3997 | drflac_uint32 riceParamParts1 = 0; |
| 3998 | drflac_uint32 riceParamParts2 = 0; |
| 3999 | drflac_uint32 riceParamParts3 = 0; |
| 4000 | __m128i coefficients128_0; |
| 4001 | __m128i coefficients128_4; |
| 4002 | __m128i coefficients128_8; |
| 4003 | __m128i samples128_0; |
| 4004 | __m128i samples128_4; |
| 4005 | __m128i samples128_8; |
| 4006 | __m128i prediction128; |
| 4007 | __m128i riceParamMask128; |
| 4008 | |
| 4009 | const drflac_uint32 t[2] = {0x00000000, 0xFFFFFFFF}; |
| 4010 | |
| 4011 | DRFLAC_ASSERT(order <= 12); |
| 4012 | |
| 4013 | riceParamMask = (drflac_uint32)~((~0UL) << riceParam); |
| 4014 | riceParamMask128 = _mm_set1_epi32(riceParamMask); |
| 4015 | |
| 4016 | prediction128 = _mm_setzero_si128(); |
| 4017 | |
| 4018 | /* Pre-load. */ |
| 4019 | coefficients128_0 = _mm_setzero_si128(); |
| 4020 | coefficients128_4 = _mm_setzero_si128(); |
| 4021 | coefficients128_8 = _mm_setzero_si128(); |
| 4022 | |
| 4023 | samples128_0 = _mm_setzero_si128(); |
| 4024 | samples128_4 = _mm_setzero_si128(); |
| 4025 | samples128_8 = _mm_setzero_si128(); |
| 4026 | |
| 4027 | #if 1 |
| 4028 | { |
| 4029 | int runningOrder = order; |
| 4030 | |
| 4031 | /* 0 - 3. */ |
| 4032 | if (runningOrder >= 4) { |
| 4033 | coefficients128_0 = _mm_loadu_si128((const __m128i*)(coefficients + 0)); |
| 4034 | samples128_0 = _mm_loadu_si128((const __m128i*)(pSamplesOut - 4)); |
| 4035 | runningOrder -= 4; |
| 4036 | } else { |
| 4037 | switch (runningOrder) { |
| 4038 | case 3: coefficients128_0 = _mm_set_epi32(0, coefficients[2], coefficients[1], coefficients[0]); samples128_0 = _mm_set_epi32(pSamplesOut[-1], pSamplesOut[-2], pSamplesOut[-3], 0); break; |
| 4039 | case 2: coefficients128_0 = _mm_set_epi32(0, 0, coefficients[1], coefficients[0]); samples128_0 = _mm_set_epi32(pSamplesOut[-1], pSamplesOut[-2], 0, 0); break; |
| 4040 | case 1: coefficients128_0 = _mm_set_epi32(0, 0, 0, coefficients[0]); samples128_0 = _mm_set_epi32(pSamplesOut[-1], 0, 0, 0); break; |
| 4041 | } |
| 4042 | runningOrder = 0; |
| 4043 | } |
| 4044 | |
| 4045 | /* 4 - 7 */ |
| 4046 | if (runningOrder >= 4) { |
| 4047 | coefficients128_4 = _mm_loadu_si128((const __m128i*)(coefficients + 4)); |
| 4048 | samples128_4 = _mm_loadu_si128((const __m128i*)(pSamplesOut - 8)); |
| 4049 | runningOrder -= 4; |
| 4050 | } else { |
| 4051 | switch (runningOrder) { |
| 4052 | case 3: coefficients128_4 = _mm_set_epi32(0, coefficients[6], coefficients[5], coefficients[4]); samples128_4 = _mm_set_epi32(pSamplesOut[-5], pSamplesOut[-6], pSamplesOut[-7], 0); break; |
| 4053 | case 2: coefficients128_4 = _mm_set_epi32(0, 0, coefficients[5], coefficients[4]); samples128_4 = _mm_set_epi32(pSamplesOut[-5], pSamplesOut[-6], 0, 0); break; |
| 4054 | case 1: coefficients128_4 = _mm_set_epi32(0, 0, 0, coefficients[4]); samples128_4 = _mm_set_epi32(pSamplesOut[-5], 0, 0, 0); break; |
| 4055 | } |
| 4056 | runningOrder = 0; |
| 4057 | } |
| 4058 | |
| 4059 | /* 8 - 11 */ |
| 4060 | if (runningOrder == 4) { |
| 4061 | coefficients128_8 = _mm_loadu_si128((const __m128i*)(coefficients + 8)); |
| 4062 | samples128_8 = _mm_loadu_si128((const __m128i*)(pSamplesOut - 12)); |
| 4063 | runningOrder -= 4; |
| 4064 | } else { |
| 4065 | switch (runningOrder) { |
| 4066 | case 3: coefficients128_8 = _mm_set_epi32(0, coefficients[10], coefficients[9], coefficients[8]); samples128_8 = _mm_set_epi32(pSamplesOut[-9], pSamplesOut[-10], pSamplesOut[-11], 0); break; |
| 4067 | case 2: coefficients128_8 = _mm_set_epi32(0, 0, coefficients[9], coefficients[8]); samples128_8 = _mm_set_epi32(pSamplesOut[-9], pSamplesOut[-10], 0, 0); break; |
| 4068 | case 1: coefficients128_8 = _mm_set_epi32(0, 0, 0, coefficients[8]); samples128_8 = _mm_set_epi32(pSamplesOut[-9], 0, 0, 0); break; |
| 4069 | } |
| 4070 | runningOrder = 0; |
| 4071 | } |
| 4072 | |
| 4073 | /* Coefficients need to be shuffled for our streaming algorithm below to work. Samples are already in the correct order from the loading routine above. */ |
| 4074 | coefficients128_0 = _mm_shuffle_epi32(coefficients128_0, _MM_SHUFFLE(0, 1, 2, 3)); |
| 4075 | coefficients128_4 = _mm_shuffle_epi32(coefficients128_4, _MM_SHUFFLE(0, 1, 2, 3)); |
| 4076 | coefficients128_8 = _mm_shuffle_epi32(coefficients128_8, _MM_SHUFFLE(0, 1, 2, 3)); |
| 4077 | } |
| 4078 | #else |
| 4079 | switch (order) |
| 4080 | { |
| 4081 | case 12: ((drflac_int32*)&coefficients128_8)[0] = coefficients[11]; ((drflac_int32*)&samples128_8)[0] = pDecodedSamples[-12]; |
| 4082 | case 11: ((drflac_int32*)&coefficients128_8)[1] = coefficients[10]; ((drflac_int32*)&samples128_8)[1] = pDecodedSamples[-11]; |
| 4083 | case 10: ((drflac_int32*)&coefficients128_8)[2] = coefficients[ 9]; ((drflac_int32*)&samples128_8)[2] = pDecodedSamples[-10]; |
| 4084 | case 9: ((drflac_int32*)&coefficients128_8)[3] = coefficients[ 8]; ((drflac_int32*)&samples128_8)[3] = pDecodedSamples[- 9]; |
| 4085 | case 8: ((drflac_int32*)&coefficients128_4)[0] = coefficients[ 7]; ((drflac_int32*)&samples128_4)[0] = pDecodedSamples[- 8]; |
| 4086 | case 7: ((drflac_int32*)&coefficients128_4)[1] = coefficients[ 6]; ((drflac_int32*)&samples128_4)[1] = pDecodedSamples[- 7]; |
| 4087 | case 6: ((drflac_int32*)&coefficients128_4)[2] = coefficients[ 5]; ((drflac_int32*)&samples128_4)[2] = pDecodedSamples[- 6]; |
| 4088 | case 5: ((drflac_int32*)&coefficients128_4)[3] = coefficients[ 4]; ((drflac_int32*)&samples128_4)[3] = pDecodedSamples[- 5]; |
| 4089 | case 4: ((drflac_int32*)&coefficients128_0)[0] = coefficients[ 3]; ((drflac_int32*)&samples128_0)[0] = pDecodedSamples[- 4]; |
| 4090 | case 3: ((drflac_int32*)&coefficients128_0)[1] = coefficients[ 2]; ((drflac_int32*)&samples128_0)[1] = pDecodedSamples[- 3]; |
| 4091 | case 2: ((drflac_int32*)&coefficients128_0)[2] = coefficients[ 1]; ((drflac_int32*)&samples128_0)[2] = pDecodedSamples[- 2]; |
| 4092 | case 1: ((drflac_int32*)&coefficients128_0)[3] = coefficients[ 0]; ((drflac_int32*)&samples128_0)[3] = pDecodedSamples[- 1]; |
| 4093 | } |
| 4094 | #endif |
| 4095 | |
| 4096 | /* For this version we are doing one sample at a time. */ |
| 4097 | while (pDecodedSamples < pDecodedSamplesEnd) { |
| 4098 | __m128i zeroCountPart128; |
| 4099 | __m128i riceParamPart128; |
| 4100 | |
| 4101 | if (!drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts0, &riceParamParts0) || |
| 4102 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts1, &riceParamParts1) || |
| 4103 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts2, &riceParamParts2) || |
| 4104 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts3, &riceParamParts3)) { |
| 4105 | return DRFLAC_FALSE; |
| 4106 | } |
| 4107 | |
| 4108 | zeroCountPart128 = _mm_set_epi32(zeroCountParts3, zeroCountParts2, zeroCountParts1, zeroCountParts0); |
| 4109 | riceParamPart128 = _mm_set_epi32(riceParamParts3, riceParamParts2, riceParamParts1, riceParamParts0); |
| 4110 | |
| 4111 | riceParamPart128 = _mm_and_si128(riceParamPart128, riceParamMask128); |
| 4112 | riceParamPart128 = _mm_or_si128(riceParamPart128, _mm_slli_epi32(zeroCountPart128, riceParam)); |
| 4113 | riceParamPart128 = _mm_xor_si128(_mm_srli_epi32(riceParamPart128, 1), _mm_add_epi32(drflac__mm_not_si128(_mm_and_si128(riceParamPart128, _mm_set1_epi32(1))), _mm_set1_epi32(1))); |
| 4114 | |
| 4115 | for (i = 0; i < 4; i += 1) { |
| 4116 | prediction128 = _mm_xor_si128(prediction128, prediction128); /* Reset to 0. */ |
| 4117 | |
| 4118 | switch (order) |
| 4119 | { |
| 4120 | case 12: |
| 4121 | case 11: prediction128 = _mm_add_epi64(prediction128, _mm_mul_epi32(_mm_shuffle_epi32(coefficients128_8, _MM_SHUFFLE(1, 1, 0, 0)), _mm_shuffle_epi32(samples128_8, _MM_SHUFFLE(1, 1, 0, 0)))); |
| 4122 | case 10: |
| 4123 | case 9: prediction128 = _mm_add_epi64(prediction128, _mm_mul_epi32(_mm_shuffle_epi32(coefficients128_8, _MM_SHUFFLE(3, 3, 2, 2)), _mm_shuffle_epi32(samples128_8, _MM_SHUFFLE(3, 3, 2, 2)))); |
| 4124 | case 8: |
| 4125 | case 7: prediction128 = _mm_add_epi64(prediction128, _mm_mul_epi32(_mm_shuffle_epi32(coefficients128_4, _MM_SHUFFLE(1, 1, 0, 0)), _mm_shuffle_epi32(samples128_4, _MM_SHUFFLE(1, 1, 0, 0)))); |
| 4126 | case 6: |
| 4127 | case 5: prediction128 = _mm_add_epi64(prediction128, _mm_mul_epi32(_mm_shuffle_epi32(coefficients128_4, _MM_SHUFFLE(3, 3, 2, 2)), _mm_shuffle_epi32(samples128_4, _MM_SHUFFLE(3, 3, 2, 2)))); |
| 4128 | case 4: |
| 4129 | case 3: prediction128 = _mm_add_epi64(prediction128, _mm_mul_epi32(_mm_shuffle_epi32(coefficients128_0, _MM_SHUFFLE(1, 1, 0, 0)), _mm_shuffle_epi32(samples128_0, _MM_SHUFFLE(1, 1, 0, 0)))); |
| 4130 | case 2: |
| 4131 | case 1: prediction128 = _mm_add_epi64(prediction128, _mm_mul_epi32(_mm_shuffle_epi32(coefficients128_0, _MM_SHUFFLE(3, 3, 2, 2)), _mm_shuffle_epi32(samples128_0, _MM_SHUFFLE(3, 3, 2, 2)))); |
| 4132 | } |
| 4133 | |
| 4134 | /* Horizontal add and shift. */ |
| 4135 | prediction128 = drflac__mm_hadd_epi64(prediction128); |
| 4136 | prediction128 = drflac__mm_srai_epi64(prediction128, shift); |
| 4137 | prediction128 = _mm_add_epi32(riceParamPart128, prediction128); |
| 4138 | |
| 4139 | /* Our value should be sitting in prediction128[0]. We need to combine this with our SSE samples. */ |
| 4140 | samples128_8 = _mm_alignr_epi8(samples128_4, samples128_8, 4); |
| 4141 | samples128_4 = _mm_alignr_epi8(samples128_0, samples128_4, 4); |
| 4142 | samples128_0 = _mm_alignr_epi8(prediction128, samples128_0, 4); |
| 4143 | |
| 4144 | /* Slide our rice parameter down so that the value in position 0 contains the next one to process. */ |
| 4145 | riceParamPart128 = _mm_alignr_epi8(_mm_setzero_si128(), riceParamPart128, 4); |
| 4146 | } |
| 4147 | |
| 4148 | /* We store samples in groups of 4. */ |
| 4149 | _mm_storeu_si128((__m128i*)pDecodedSamples, samples128_0); |
| 4150 | pDecodedSamples += 4; |
| 4151 | } |
| 4152 | |
| 4153 | /* Make sure we process the last few samples. */ |
| 4154 | i = (count & ~3); |
| 4155 | while (i < (int)count) { |
| 4156 | /* Rice extraction. */ |
| 4157 | if (!drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts0, &riceParamParts0)) { |
| 4158 | return DRFLAC_FALSE; |
| 4159 | } |
| 4160 | |
| 4161 | /* Rice reconstruction. */ |
| 4162 | riceParamParts0 &= riceParamMask; |
| 4163 | riceParamParts0 |= (zeroCountParts0 << riceParam); |
| 4164 | riceParamParts0 = (riceParamParts0 >> 1) ^ t[riceParamParts0 & 0x01]; |
| 4165 | |
| 4166 | /* Sample reconstruction. */ |
| 4167 | pDecodedSamples[0] = riceParamParts0 + drflac__calculate_prediction_64(order, shift, coefficients, pDecodedSamples); |
| 4168 | |
| 4169 | i += 1; |
| 4170 | pDecodedSamples += 1; |
| 4171 | } |
| 4172 | |
| 4173 | return DRFLAC_TRUE; |
| 4174 | } |
| 4175 | |
| 4176 | static drflac_bool32 drflac__decode_samples_with_residual__rice__sse41(drflac_bs* bs, drflac_uint32 bitsPerSample, drflac_uint32 count, drflac_uint8 riceParam, drflac_uint32 order, drflac_int32 shift, const drflac_int32* coefficients, drflac_int32* pSamplesOut) |
| 4177 | { |
| 4178 | DRFLAC_ASSERT(bs != NULL); |
| 4179 | DRFLAC_ASSERT(count > 0); |
| 4180 | DRFLAC_ASSERT(pSamplesOut != NULL); |
| 4181 | |
| 4182 | /* In my testing the order is rarely > 12, so in this case I'm going to simplify the SSE implementation by only handling order <= 12. */ |
| 4183 | if (order > 0 && order <= 12) { |
| 4184 | if (bitsPerSample+shift > 32) { |
| 4185 | return drflac__decode_samples_with_residual__rice__sse41_64(bs, count, riceParam, order, shift, coefficients, pSamplesOut); |
| 4186 | } else { |
| 4187 | return drflac__decode_samples_with_residual__rice__sse41_32(bs, count, riceParam, order, shift, coefficients, pSamplesOut); |
| 4188 | } |
| 4189 | } else { |
| 4190 | return drflac__decode_samples_with_residual__rice__scalar(bs, bitsPerSample, count, riceParam, order, shift, coefficients, pSamplesOut); |
| 4191 | } |
| 4192 | } |
| 4193 | #endif |
| 4194 | |
| 4195 | #if defined(DRFLAC_SUPPORT_NEON) |
| 4196 | static DRFLAC_INLINE void drflac__vst2q_s32(drflac_int32* p, int32x4x2_t x) |
| 4197 | { |
| 4198 | vst1q_s32(p+0, x.val[0]); |
| 4199 | vst1q_s32(p+4, x.val[1]); |
| 4200 | } |
| 4201 | |
| 4202 | static DRFLAC_INLINE void drflac__vst2q_u32(drflac_uint32* p, uint32x4x2_t x) |
| 4203 | { |
| 4204 | vst1q_u32(p+0, x.val[0]); |
| 4205 | vst1q_u32(p+4, x.val[1]); |
| 4206 | } |
| 4207 | |
| 4208 | static DRFLAC_INLINE void drflac__vst2q_f32(float* p, float32x4x2_t x) |
| 4209 | { |
| 4210 | vst1q_f32(p+0, x.val[0]); |
| 4211 | vst1q_f32(p+4, x.val[1]); |
| 4212 | } |
| 4213 | |
| 4214 | static DRFLAC_INLINE void drflac__vst2q_s16(drflac_int16* p, int16x4x2_t x) |
| 4215 | { |
| 4216 | vst1q_s16(p, vcombine_s16(x.val[0], x.val[1])); |
| 4217 | } |
| 4218 | |
| 4219 | static DRFLAC_INLINE void drflac__vst2q_u16(drflac_uint16* p, uint16x4x2_t x) |
| 4220 | { |
| 4221 | vst1q_u16(p, vcombine_u16(x.val[0], x.val[1])); |
| 4222 | } |
| 4223 | |
| 4224 | static DRFLAC_INLINE int32x4_t drflac__vdupq_n_s32x4(drflac_int32 x3, drflac_int32 x2, drflac_int32 x1, drflac_int32 x0) |
| 4225 | { |
| 4226 | drflac_int32 x[4]; |
| 4227 | x[3] = x3; |
| 4228 | x[2] = x2; |
| 4229 | x[1] = x1; |
| 4230 | x[0] = x0; |
| 4231 | return vld1q_s32(x); |
| 4232 | } |
| 4233 | |
| 4234 | static DRFLAC_INLINE int32x4_t drflac__valignrq_s32_1(int32x4_t a, int32x4_t b) |
| 4235 | { |
| 4236 | /* Equivalent to SSE's _mm_alignr_epi8(a, b, 4) */ |
| 4237 | |
| 4238 | /* Reference */ |
| 4239 | /*return drflac__vdupq_n_s32x4( |
| 4240 | vgetq_lane_s32(a, 0), |
| 4241 | vgetq_lane_s32(b, 3), |
| 4242 | vgetq_lane_s32(b, 2), |
| 4243 | vgetq_lane_s32(b, 1) |
| 4244 | );*/ |
| 4245 | |
| 4246 | return vextq_s32(b, a, 1); |
| 4247 | } |
| 4248 | |
| 4249 | static DRFLAC_INLINE uint32x4_t drflac__valignrq_u32_1(uint32x4_t a, uint32x4_t b) |
| 4250 | { |
| 4251 | /* Equivalent to SSE's _mm_alignr_epi8(a, b, 4) */ |
| 4252 | |
| 4253 | /* Reference */ |
| 4254 | /*return drflac__vdupq_n_s32x4( |
| 4255 | vgetq_lane_s32(a, 0), |
| 4256 | vgetq_lane_s32(b, 3), |
| 4257 | vgetq_lane_s32(b, 2), |
| 4258 | vgetq_lane_s32(b, 1) |
| 4259 | );*/ |
| 4260 | |
| 4261 | return vextq_u32(b, a, 1); |
| 4262 | } |
| 4263 | |
| 4264 | static DRFLAC_INLINE int32x2_t drflac__vhaddq_s32(int32x4_t x) |
| 4265 | { |
| 4266 | /* The sum must end up in position 0. */ |
| 4267 | |
| 4268 | /* Reference */ |
| 4269 | /*return vdupq_n_s32( |
| 4270 | vgetq_lane_s32(x, 3) + |
| 4271 | vgetq_lane_s32(x, 2) + |
| 4272 | vgetq_lane_s32(x, 1) + |
| 4273 | vgetq_lane_s32(x, 0) |
| 4274 | );*/ |
| 4275 | |
| 4276 | int32x2_t r = vadd_s32(vget_high_s32(x), vget_low_s32(x)); |
| 4277 | return vpadd_s32(r, r); |
| 4278 | } |
| 4279 | |
| 4280 | static DRFLAC_INLINE int64x1_t drflac__vhaddq_s64(int64x2_t x) |
| 4281 | { |
| 4282 | return vadd_s64(vget_high_s64(x), vget_low_s64(x)); |
| 4283 | } |
| 4284 | |
| 4285 | static DRFLAC_INLINE int32x4_t drflac__vrevq_s32(int32x4_t x) |
| 4286 | { |
| 4287 | /* Reference */ |
| 4288 | /*return drflac__vdupq_n_s32x4( |
| 4289 | vgetq_lane_s32(x, 0), |
| 4290 | vgetq_lane_s32(x, 1), |
| 4291 | vgetq_lane_s32(x, 2), |
| 4292 | vgetq_lane_s32(x, 3) |
| 4293 | );*/ |
| 4294 | |
| 4295 | return vrev64q_s32(vcombine_s32(vget_high_s32(x), vget_low_s32(x))); |
| 4296 | } |
| 4297 | |
| 4298 | static DRFLAC_INLINE int32x4_t drflac__vnotq_s32(int32x4_t x) |
| 4299 | { |
| 4300 | return veorq_s32(x, vdupq_n_s32(0xFFFFFFFF)); |
| 4301 | } |
| 4302 | |
| 4303 | static DRFLAC_INLINE uint32x4_t drflac__vnotq_u32(uint32x4_t x) |
| 4304 | { |
| 4305 | return veorq_u32(x, vdupq_n_u32(0xFFFFFFFF)); |
| 4306 | } |
| 4307 | |
| 4308 | static drflac_bool32 drflac__decode_samples_with_residual__rice__neon_32(drflac_bs* bs, drflac_uint32 count, drflac_uint8 riceParam, drflac_uint32 order, drflac_int32 shift, const drflac_int32* coefficients, drflac_int32* pSamplesOut) |
| 4309 | { |
| 4310 | int i; |
| 4311 | drflac_uint32 riceParamMask; |
| 4312 | drflac_int32* pDecodedSamples = pSamplesOut; |
| 4313 | drflac_int32* pDecodedSamplesEnd = pSamplesOut + (count & ~3); |
| 4314 | drflac_uint32 zeroCountParts[4]; |
| 4315 | drflac_uint32 riceParamParts[4]; |
| 4316 | int32x4_t coefficients128_0; |
| 4317 | int32x4_t coefficients128_4; |
| 4318 | int32x4_t coefficients128_8; |
| 4319 | int32x4_t samples128_0; |
| 4320 | int32x4_t samples128_4; |
| 4321 | int32x4_t samples128_8; |
| 4322 | uint32x4_t riceParamMask128; |
| 4323 | int32x4_t riceParam128; |
| 4324 | int32x2_t shift64; |
| 4325 | uint32x4_t one128; |
| 4326 | |
| 4327 | const drflac_uint32 t[2] = {0x00000000, 0xFFFFFFFF}; |
| 4328 | |
| 4329 | riceParamMask = ~((~0UL) << riceParam); |
| 4330 | riceParamMask128 = vdupq_n_u32(riceParamMask); |
| 4331 | |
| 4332 | riceParam128 = vdupq_n_s32(riceParam); |
| 4333 | shift64 = vdup_n_s32(-shift); /* Negate the shift because we'll be doing a variable shift using vshlq_s32(). */ |
| 4334 | one128 = vdupq_n_u32(1); |
| 4335 | |
| 4336 | /* |
| 4337 | Pre-loading the coefficients and prior samples is annoying because we need to ensure we don't try reading more than |
| 4338 | what's available in the input buffers. It would be conenient to use a fall-through switch to do this, but this results |
| 4339 | in strict aliasing warnings with GCC. To work around this I'm just doing something hacky. This feels a bit convoluted |
| 4340 | so I think there's opportunity for this to be simplified. |
| 4341 | */ |
| 4342 | { |
| 4343 | int runningOrder = order; |
| 4344 | drflac_int32 tempC[4] = {0, 0, 0, 0}; |
| 4345 | drflac_int32 tempS[4] = {0, 0, 0, 0}; |
| 4346 | |
| 4347 | /* 0 - 3. */ |
| 4348 | if (runningOrder >= 4) { |
| 4349 | coefficients128_0 = vld1q_s32(coefficients + 0); |
| 4350 | samples128_0 = vld1q_s32(pSamplesOut - 4); |
| 4351 | runningOrder -= 4; |
| 4352 | } else { |
| 4353 | switch (runningOrder) { |
| 4354 | case 3: tempC[2] = coefficients[2]; tempS[1] = pSamplesOut[-3]; /* fallthrough */ |
| 4355 | case 2: tempC[1] = coefficients[1]; tempS[2] = pSamplesOut[-2]; /* fallthrough */ |
| 4356 | case 1: tempC[0] = coefficients[0]; tempS[3] = pSamplesOut[-1]; /* fallthrough */ |
| 4357 | } |
| 4358 | |
| 4359 | coefficients128_0 = vld1q_s32(tempC); |
| 4360 | samples128_0 = vld1q_s32(tempS); |
| 4361 | runningOrder = 0; |
| 4362 | } |
| 4363 | |
| 4364 | /* 4 - 7 */ |
| 4365 | if (runningOrder >= 4) { |
| 4366 | coefficients128_4 = vld1q_s32(coefficients + 4); |
| 4367 | samples128_4 = vld1q_s32(pSamplesOut - 8); |
| 4368 | runningOrder -= 4; |
| 4369 | } else { |
| 4370 | switch (runningOrder) { |
| 4371 | case 3: tempC[2] = coefficients[6]; tempS[1] = pSamplesOut[-7]; /* fallthrough */ |
| 4372 | case 2: tempC[1] = coefficients[5]; tempS[2] = pSamplesOut[-6]; /* fallthrough */ |
| 4373 | case 1: tempC[0] = coefficients[4]; tempS[3] = pSamplesOut[-5]; /* fallthrough */ |
| 4374 | } |
| 4375 | |
| 4376 | coefficients128_4 = vld1q_s32(tempC); |
| 4377 | samples128_4 = vld1q_s32(tempS); |
| 4378 | runningOrder = 0; |
| 4379 | } |
| 4380 | |
| 4381 | /* 8 - 11 */ |
| 4382 | if (runningOrder == 4) { |
| 4383 | coefficients128_8 = vld1q_s32(coefficients + 8); |
| 4384 | samples128_8 = vld1q_s32(pSamplesOut - 12); |
| 4385 | runningOrder -= 4; |
| 4386 | } else { |
| 4387 | switch (runningOrder) { |
| 4388 | case 3: tempC[2] = coefficients[10]; tempS[1] = pSamplesOut[-11]; /* fallthrough */ |
| 4389 | case 2: tempC[1] = coefficients[ 9]; tempS[2] = pSamplesOut[-10]; /* fallthrough */ |
| 4390 | case 1: tempC[0] = coefficients[ 8]; tempS[3] = pSamplesOut[- 9]; /* fallthrough */ |
| 4391 | } |
| 4392 | |
| 4393 | coefficients128_8 = vld1q_s32(tempC); |
| 4394 | samples128_8 = vld1q_s32(tempS); |
| 4395 | runningOrder = 0; |
| 4396 | } |
| 4397 | |
| 4398 | /* Coefficients need to be shuffled for our streaming algorithm below to work. Samples are already in the correct order from the loading routine above. */ |
| 4399 | coefficients128_0 = drflac__vrevq_s32(coefficients128_0); |
| 4400 | coefficients128_4 = drflac__vrevq_s32(coefficients128_4); |
| 4401 | coefficients128_8 = drflac__vrevq_s32(coefficients128_8); |
| 4402 | } |
| 4403 | |
| 4404 | /* For this version we are doing one sample at a time. */ |
| 4405 | while (pDecodedSamples < pDecodedSamplesEnd) { |
| 4406 | int32x4_t prediction128; |
| 4407 | int32x2_t prediction64; |
| 4408 | uint32x4_t zeroCountPart128; |
| 4409 | uint32x4_t riceParamPart128; |
| 4410 | |
| 4411 | if (!drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts[0], &riceParamParts[0]) || |
| 4412 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts[1], &riceParamParts[1]) || |
| 4413 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts[2], &riceParamParts[2]) || |
| 4414 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts[3], &riceParamParts[3])) { |
| 4415 | return DRFLAC_FALSE; |
| 4416 | } |
| 4417 | |
| 4418 | zeroCountPart128 = vld1q_u32(zeroCountParts); |
| 4419 | riceParamPart128 = vld1q_u32(riceParamParts); |
| 4420 | |
| 4421 | riceParamPart128 = vandq_u32(riceParamPart128, riceParamMask128); |
| 4422 | riceParamPart128 = vorrq_u32(riceParamPart128, vshlq_u32(zeroCountPart128, riceParam128)); |
| 4423 | riceParamPart128 = veorq_u32(vshrq_n_u32(riceParamPart128, 1), vaddq_u32(drflac__vnotq_u32(vandq_u32(riceParamPart128, one128)), one128)); |
| 4424 | |
| 4425 | if (order <= 4) { |
| 4426 | for (i = 0; i < 4; i += 1) { |
| 4427 | prediction128 = vmulq_s32(coefficients128_0, samples128_0); |
| 4428 | |
| 4429 | /* Horizontal add and shift. */ |
| 4430 | prediction64 = drflac__vhaddq_s32(prediction128); |
| 4431 | prediction64 = vshl_s32(prediction64, shift64); |
| 4432 | prediction64 = vadd_s32(prediction64, vget_low_s32(vreinterpretq_s32_u32(riceParamPart128))); |
| 4433 | |
| 4434 | samples128_0 = drflac__valignrq_s32_1(vcombine_s32(prediction64, vdup_n_s32(0)), samples128_0); |
| 4435 | riceParamPart128 = drflac__valignrq_u32_1(vdupq_n_u32(0), riceParamPart128); |
| 4436 | } |
| 4437 | } else if (order <= 8) { |
| 4438 | for (i = 0; i < 4; i += 1) { |
| 4439 | prediction128 = vmulq_s32(coefficients128_4, samples128_4); |
| 4440 | prediction128 = vmlaq_s32(prediction128, coefficients128_0, samples128_0); |
| 4441 | |
| 4442 | /* Horizontal add and shift. */ |
| 4443 | prediction64 = drflac__vhaddq_s32(prediction128); |
| 4444 | prediction64 = vshl_s32(prediction64, shift64); |
| 4445 | prediction64 = vadd_s32(prediction64, vget_low_s32(vreinterpretq_s32_u32(riceParamPart128))); |
| 4446 | |
| 4447 | samples128_4 = drflac__valignrq_s32_1(samples128_0, samples128_4); |
| 4448 | samples128_0 = drflac__valignrq_s32_1(vcombine_s32(prediction64, vdup_n_s32(0)), samples128_0); |
| 4449 | riceParamPart128 = drflac__valignrq_u32_1(vdupq_n_u32(0), riceParamPart128); |
| 4450 | } |
| 4451 | } else { |
| 4452 | for (i = 0; i < 4; i += 1) { |
| 4453 | prediction128 = vmulq_s32(coefficients128_8, samples128_8); |
| 4454 | prediction128 = vmlaq_s32(prediction128, coefficients128_4, samples128_4); |
| 4455 | prediction128 = vmlaq_s32(prediction128, coefficients128_0, samples128_0); |
| 4456 | |
| 4457 | /* Horizontal add and shift. */ |
| 4458 | prediction64 = drflac__vhaddq_s32(prediction128); |
| 4459 | prediction64 = vshl_s32(prediction64, shift64); |
| 4460 | prediction64 = vadd_s32(prediction64, vget_low_s32(vreinterpretq_s32_u32(riceParamPart128))); |
| 4461 | |
| 4462 | samples128_8 = drflac__valignrq_s32_1(samples128_4, samples128_8); |
| 4463 | samples128_4 = drflac__valignrq_s32_1(samples128_0, samples128_4); |
| 4464 | samples128_0 = drflac__valignrq_s32_1(vcombine_s32(prediction64, vdup_n_s32(0)), samples128_0); |
| 4465 | riceParamPart128 = drflac__valignrq_u32_1(vdupq_n_u32(0), riceParamPart128); |
| 4466 | } |
| 4467 | } |
| 4468 | |
| 4469 | /* We store samples in groups of 4. */ |
| 4470 | vst1q_s32(pDecodedSamples, samples128_0); |
| 4471 | pDecodedSamples += 4; |
| 4472 | } |
| 4473 | |
| 4474 | /* Make sure we process the last few samples. */ |
| 4475 | i = (count & ~3); |
| 4476 | while (i < (int)count) { |
| 4477 | /* Rice extraction. */ |
| 4478 | if (!drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts[0], &riceParamParts[0])) { |
| 4479 | return DRFLAC_FALSE; |
| 4480 | } |
| 4481 | |
| 4482 | /* Rice reconstruction. */ |
| 4483 | riceParamParts[0] &= riceParamMask; |
| 4484 | riceParamParts[0] |= (zeroCountParts[0] << riceParam); |
| 4485 | riceParamParts[0] = (riceParamParts[0] >> 1) ^ t[riceParamParts[0] & 0x01]; |
| 4486 | |
| 4487 | /* Sample reconstruction. */ |
| 4488 | pDecodedSamples[0] = riceParamParts[0] + drflac__calculate_prediction_32(order, shift, coefficients, pDecodedSamples); |
| 4489 | |
| 4490 | i += 1; |
| 4491 | pDecodedSamples += 1; |
| 4492 | } |
| 4493 | |
| 4494 | return DRFLAC_TRUE; |
| 4495 | } |
| 4496 | |
| 4497 | static drflac_bool32 drflac__decode_samples_with_residual__rice__neon_64(drflac_bs* bs, drflac_uint32 count, drflac_uint8 riceParam, drflac_uint32 order, drflac_int32 shift, const drflac_int32* coefficients, drflac_int32* pSamplesOut) |
| 4498 | { |
| 4499 | int i; |
| 4500 | drflac_uint32 riceParamMask; |
| 4501 | drflac_int32* pDecodedSamples = pSamplesOut; |
| 4502 | drflac_int32* pDecodedSamplesEnd = pSamplesOut + (count & ~3); |
| 4503 | drflac_uint32 zeroCountParts[4]; |
| 4504 | drflac_uint32 riceParamParts[4]; |
| 4505 | int32x4_t coefficients128_0; |
| 4506 | int32x4_t coefficients128_4; |
| 4507 | int32x4_t coefficients128_8; |
| 4508 | int32x4_t samples128_0; |
| 4509 | int32x4_t samples128_4; |
| 4510 | int32x4_t samples128_8; |
| 4511 | uint32x4_t riceParamMask128; |
| 4512 | int32x4_t riceParam128; |
| 4513 | int64x1_t shift64; |
| 4514 | uint32x4_t one128; |
| 4515 | |
| 4516 | const drflac_uint32 t[2] = {0x00000000, 0xFFFFFFFF}; |
| 4517 | |
| 4518 | riceParamMask = ~((~0UL) << riceParam); |
| 4519 | riceParamMask128 = vdupq_n_u32(riceParamMask); |
| 4520 | |
| 4521 | riceParam128 = vdupq_n_s32(riceParam); |
| 4522 | shift64 = vdup_n_s64(-shift); /* Negate the shift because we'll be doing a variable shift using vshlq_s32(). */ |
| 4523 | one128 = vdupq_n_u32(1); |
| 4524 | |
| 4525 | /* |
| 4526 | Pre-loading the coefficients and prior samples is annoying because we need to ensure we don't try reading more than |
| 4527 | what's available in the input buffers. It would be conenient to use a fall-through switch to do this, but this results |
| 4528 | in strict aliasing warnings with GCC. To work around this I'm just doing something hacky. This feels a bit convoluted |
| 4529 | so I think there's opportunity for this to be simplified. |
| 4530 | */ |
| 4531 | { |
| 4532 | int runningOrder = order; |
| 4533 | drflac_int32 tempC[4] = {0, 0, 0, 0}; |
| 4534 | drflac_int32 tempS[4] = {0, 0, 0, 0}; |
| 4535 | |
| 4536 | /* 0 - 3. */ |
| 4537 | if (runningOrder >= 4) { |
| 4538 | coefficients128_0 = vld1q_s32(coefficients + 0); |
| 4539 | samples128_0 = vld1q_s32(pSamplesOut - 4); |
| 4540 | runningOrder -= 4; |
| 4541 | } else { |
| 4542 | switch (runningOrder) { |
| 4543 | case 3: tempC[2] = coefficients[2]; tempS[1] = pSamplesOut[-3]; /* fallthrough */ |
| 4544 | case 2: tempC[1] = coefficients[1]; tempS[2] = pSamplesOut[-2]; /* fallthrough */ |
| 4545 | case 1: tempC[0] = coefficients[0]; tempS[3] = pSamplesOut[-1]; /* fallthrough */ |
| 4546 | } |
| 4547 | |
| 4548 | coefficients128_0 = vld1q_s32(tempC); |
| 4549 | samples128_0 = vld1q_s32(tempS); |
| 4550 | runningOrder = 0; |
| 4551 | } |
| 4552 | |
| 4553 | /* 4 - 7 */ |
| 4554 | if (runningOrder >= 4) { |
| 4555 | coefficients128_4 = vld1q_s32(coefficients + 4); |
| 4556 | samples128_4 = vld1q_s32(pSamplesOut - 8); |
| 4557 | runningOrder -= 4; |
| 4558 | } else { |
| 4559 | switch (runningOrder) { |
| 4560 | case 3: tempC[2] = coefficients[6]; tempS[1] = pSamplesOut[-7]; /* fallthrough */ |
| 4561 | case 2: tempC[1] = coefficients[5]; tempS[2] = pSamplesOut[-6]; /* fallthrough */ |
| 4562 | case 1: tempC[0] = coefficients[4]; tempS[3] = pSamplesOut[-5]; /* fallthrough */ |
| 4563 | } |
| 4564 | |
| 4565 | coefficients128_4 = vld1q_s32(tempC); |
| 4566 | samples128_4 = vld1q_s32(tempS); |
| 4567 | runningOrder = 0; |
| 4568 | } |
| 4569 | |
| 4570 | /* 8 - 11 */ |
| 4571 | if (runningOrder == 4) { |
| 4572 | coefficients128_8 = vld1q_s32(coefficients + 8); |
| 4573 | samples128_8 = vld1q_s32(pSamplesOut - 12); |
| 4574 | runningOrder -= 4; |
| 4575 | } else { |
| 4576 | switch (runningOrder) { |
| 4577 | case 3: tempC[2] = coefficients[10]; tempS[1] = pSamplesOut[-11]; /* fallthrough */ |
| 4578 | case 2: tempC[1] = coefficients[ 9]; tempS[2] = pSamplesOut[-10]; /* fallthrough */ |
| 4579 | case 1: tempC[0] = coefficients[ 8]; tempS[3] = pSamplesOut[- 9]; /* fallthrough */ |
| 4580 | } |
| 4581 | |
| 4582 | coefficients128_8 = vld1q_s32(tempC); |
| 4583 | samples128_8 = vld1q_s32(tempS); |
| 4584 | runningOrder = 0; |
| 4585 | } |
| 4586 | |
| 4587 | /* Coefficients need to be shuffled for our streaming algorithm below to work. Samples are already in the correct order from the loading routine above. */ |
| 4588 | coefficients128_0 = drflac__vrevq_s32(coefficients128_0); |
| 4589 | coefficients128_4 = drflac__vrevq_s32(coefficients128_4); |
| 4590 | coefficients128_8 = drflac__vrevq_s32(coefficients128_8); |
| 4591 | } |
| 4592 | |
| 4593 | /* For this version we are doing one sample at a time. */ |
| 4594 | while (pDecodedSamples < pDecodedSamplesEnd) { |
| 4595 | int64x2_t prediction128; |
| 4596 | uint32x4_t zeroCountPart128; |
| 4597 | uint32x4_t riceParamPart128; |
| 4598 | |
| 4599 | if (!drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts[0], &riceParamParts[0]) || |
| 4600 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts[1], &riceParamParts[1]) || |
| 4601 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts[2], &riceParamParts[2]) || |
| 4602 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts[3], &riceParamParts[3])) { |
| 4603 | return DRFLAC_FALSE; |
| 4604 | } |
| 4605 | |
| 4606 | zeroCountPart128 = vld1q_u32(zeroCountParts); |
| 4607 | riceParamPart128 = vld1q_u32(riceParamParts); |
| 4608 | |
| 4609 | riceParamPart128 = vandq_u32(riceParamPart128, riceParamMask128); |
| 4610 | riceParamPart128 = vorrq_u32(riceParamPart128, vshlq_u32(zeroCountPart128, riceParam128)); |
| 4611 | riceParamPart128 = veorq_u32(vshrq_n_u32(riceParamPart128, 1), vaddq_u32(drflac__vnotq_u32(vandq_u32(riceParamPart128, one128)), one128)); |
| 4612 | |
| 4613 | for (i = 0; i < 4; i += 1) { |
| 4614 | int64x1_t prediction64; |
| 4615 | |
| 4616 | prediction128 = veorq_s64(prediction128, prediction128); /* Reset to 0. */ |
| 4617 | switch (order) |
| 4618 | { |
| 4619 | case 12: |
| 4620 | case 11: prediction128 = vaddq_s64(prediction128, vmull_s32(vget_low_s32(coefficients128_8), vget_low_s32(samples128_8))); |
| 4621 | case 10: |
| 4622 | case 9: prediction128 = vaddq_s64(prediction128, vmull_s32(vget_high_s32(coefficients128_8), vget_high_s32(samples128_8))); |
| 4623 | case 8: |
| 4624 | case 7: prediction128 = vaddq_s64(prediction128, vmull_s32(vget_low_s32(coefficients128_4), vget_low_s32(samples128_4))); |
| 4625 | case 6: |
| 4626 | case 5: prediction128 = vaddq_s64(prediction128, vmull_s32(vget_high_s32(coefficients128_4), vget_high_s32(samples128_4))); |
| 4627 | case 4: |
| 4628 | case 3: prediction128 = vaddq_s64(prediction128, vmull_s32(vget_low_s32(coefficients128_0), vget_low_s32(samples128_0))); |
| 4629 | case 2: |
| 4630 | case 1: prediction128 = vaddq_s64(prediction128, vmull_s32(vget_high_s32(coefficients128_0), vget_high_s32(samples128_0))); |
| 4631 | } |
| 4632 | |
| 4633 | /* Horizontal add and shift. */ |
| 4634 | prediction64 = drflac__vhaddq_s64(prediction128); |
| 4635 | prediction64 = vshl_s64(prediction64, shift64); |
| 4636 | prediction64 = vadd_s64(prediction64, vdup_n_s64(vgetq_lane_u32(riceParamPart128, 0))); |
| 4637 | |
| 4638 | /* Our value should be sitting in prediction64[0]. We need to combine this with our SSE samples. */ |
| 4639 | samples128_8 = drflac__valignrq_s32_1(samples128_4, samples128_8); |
| 4640 | samples128_4 = drflac__valignrq_s32_1(samples128_0, samples128_4); |
| 4641 | samples128_0 = drflac__valignrq_s32_1(vcombine_s32(vreinterpret_s32_s64(prediction64), vdup_n_s32(0)), samples128_0); |
| 4642 | |
| 4643 | /* Slide our rice parameter down so that the value in position 0 contains the next one to process. */ |
| 4644 | riceParamPart128 = drflac__valignrq_u32_1(vdupq_n_u32(0), riceParamPart128); |
| 4645 | } |
| 4646 | |
| 4647 | /* We store samples in groups of 4. */ |
| 4648 | vst1q_s32(pDecodedSamples, samples128_0); |
| 4649 | pDecodedSamples += 4; |
| 4650 | } |
| 4651 | |
| 4652 | /* Make sure we process the last few samples. */ |
| 4653 | i = (count & ~3); |
| 4654 | while (i < (int)count) { |
| 4655 | /* Rice extraction. */ |
| 4656 | if (!drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts[0], &riceParamParts[0])) { |
| 4657 | return DRFLAC_FALSE; |
| 4658 | } |
| 4659 | |
| 4660 | /* Rice reconstruction. */ |
| 4661 | riceParamParts[0] &= riceParamMask; |
| 4662 | riceParamParts[0] |= (zeroCountParts[0] << riceParam); |
| 4663 | riceParamParts[0] = (riceParamParts[0] >> 1) ^ t[riceParamParts[0] & 0x01]; |
| 4664 | |
| 4665 | /* Sample reconstruction. */ |
| 4666 | pDecodedSamples[0] = riceParamParts[0] + drflac__calculate_prediction_64(order, shift, coefficients, pDecodedSamples); |
| 4667 | |
| 4668 | i += 1; |
| 4669 | pDecodedSamples += 1; |
| 4670 | } |
| 4671 | |
| 4672 | return DRFLAC_TRUE; |
| 4673 | } |
| 4674 | |
| 4675 | static drflac_bool32 drflac__decode_samples_with_residual__rice__neon(drflac_bs* bs, drflac_uint32 bitsPerSample, drflac_uint32 count, drflac_uint8 riceParam, drflac_uint32 order, drflac_int32 shift, const drflac_int32* coefficients, drflac_int32* pSamplesOut) |
| 4676 | { |
| 4677 | DRFLAC_ASSERT(bs != NULL); |
| 4678 | DRFLAC_ASSERT(count > 0); |
| 4679 | DRFLAC_ASSERT(pSamplesOut != NULL); |
| 4680 | |
| 4681 | /* In my testing the order is rarely > 12, so in this case I'm going to simplify the NEON implementation by only handling order <= 12. */ |
| 4682 | if (order > 0 && order <= 12) { |
| 4683 | if (bitsPerSample+shift > 32) { |
| 4684 | return drflac__decode_samples_with_residual__rice__neon_64(bs, count, riceParam, order, shift, coefficients, pSamplesOut); |
| 4685 | } else { |
| 4686 | return drflac__decode_samples_with_residual__rice__neon_32(bs, count, riceParam, order, shift, coefficients, pSamplesOut); |
| 4687 | } |
| 4688 | } else { |
| 4689 | return drflac__decode_samples_with_residual__rice__scalar(bs, bitsPerSample, count, riceParam, order, shift, coefficients, pSamplesOut); |
| 4690 | } |
| 4691 | } |
| 4692 | #endif |
| 4693 | |
| 4694 | static drflac_bool32 drflac__decode_samples_with_residual__rice(drflac_bs* bs, drflac_uint32 bitsPerSample, drflac_uint32 count, drflac_uint8 riceParam, drflac_uint32 order, drflac_int32 shift, const drflac_int32* coefficients, drflac_int32* pSamplesOut) |
| 4695 | { |
| 4696 | #if defined(DRFLAC_SUPPORT_SSE41) |
| 4697 | if (drflac__gIsSSE41Supported) { |
| 4698 | return drflac__decode_samples_with_residual__rice__sse41(bs, bitsPerSample, count, riceParam, order, shift, coefficients, pSamplesOut); |
| 4699 | } else |
| 4700 | #elif defined(DRFLAC_SUPPORT_NEON) |
| 4701 | if (drflac__gIsNEONSupported) { |
| 4702 | return drflac__decode_samples_with_residual__rice__neon(bs, bitsPerSample, count, riceParam, order, shift, coefficients, pSamplesOut); |
| 4703 | } else |
| 4704 | #endif |
| 4705 | { |
| 4706 | /* Scalar fallback. */ |
| 4707 | #if 0 |
| 4708 | return drflac__decode_samples_with_residual__rice__reference(bs, bitsPerSample, count, riceParam, order, shift, coefficients, pSamplesOut); |
| 4709 | #else |
| 4710 | return drflac__decode_samples_with_residual__rice__scalar(bs, bitsPerSample, count, riceParam, order, shift, coefficients, pSamplesOut); |
| 4711 | #endif |
| 4712 | } |
| 4713 | } |
| 4714 | |
| 4715 | /* Reads and seeks past a string of residual values as Rice codes. The decoder should be sitting on the first bit of the Rice codes. */ |
| 4716 | static drflac_bool32 drflac__read_and_seek_residual__rice(drflac_bs* bs, drflac_uint32 count, drflac_uint8 riceParam) |
| 4717 | { |
| 4718 | drflac_uint32 i; |
| 4719 | |
| 4720 | DRFLAC_ASSERT(bs != NULL); |
| 4721 | DRFLAC_ASSERT(count > 0); |
| 4722 | |
| 4723 | for (i = 0; i < count; ++i) { |
| 4724 | if (!drflac__seek_rice_parts(bs, riceParam)) { |
| 4725 | return DRFLAC_FALSE; |
| 4726 | } |
| 4727 | } |
| 4728 | |
| 4729 | return DRFLAC_TRUE; |
| 4730 | } |
| 4731 | |
| 4732 | static drflac_bool32 drflac__decode_samples_with_residual__unencoded(drflac_bs* bs, drflac_uint32 bitsPerSample, drflac_uint32 count, drflac_uint8 unencodedBitsPerSample, drflac_uint32 order, drflac_int32 shift, const drflac_int32* coefficients, drflac_int32* pSamplesOut) |
| 4733 | { |
| 4734 | drflac_uint32 i; |
| 4735 | |
| 4736 | DRFLAC_ASSERT(bs != NULL); |
| 4737 | DRFLAC_ASSERT(count > 0); |
| 4738 | DRFLAC_ASSERT(unencodedBitsPerSample <= 31); /* <-- unencodedBitsPerSample is a 5 bit number, so cannot exceed 31. */ |
| 4739 | DRFLAC_ASSERT(pSamplesOut != NULL); |
| 4740 | |
| 4741 | for (i = 0; i < count; ++i) { |
| 4742 | if (unencodedBitsPerSample > 0) { |
| 4743 | if (!drflac__read_int32(bs, unencodedBitsPerSample, pSamplesOut + i)) { |
| 4744 | return DRFLAC_FALSE; |
| 4745 | } |
| 4746 | } else { |
| 4747 | pSamplesOut[i] = 0; |
| 4748 | } |
| 4749 | |
| 4750 | if (bitsPerSample >= 24) { |
| 4751 | pSamplesOut[i] += drflac__calculate_prediction_64(order, shift, coefficients, pSamplesOut + i); |
| 4752 | } else { |
| 4753 | pSamplesOut[i] += drflac__calculate_prediction_32(order, shift, coefficients, pSamplesOut + i); |
| 4754 | } |
| 4755 | } |
| 4756 | |
| 4757 | return DRFLAC_TRUE; |
| 4758 | } |
| 4759 | |
| 4760 | |
| 4761 | /* |
| 4762 | Reads and decodes the residual for the sub-frame the decoder is currently sitting on. This function should be called |
| 4763 | when the decoder is sitting at the very start of the RESIDUAL block. The first <order> residuals will be ignored. The |
| 4764 | <blockSize> and <order> parameters are used to determine how many residual values need to be decoded. |
| 4765 | */ |
| 4766 | static drflac_bool32 drflac__decode_samples_with_residual(drflac_bs* bs, drflac_uint32 bitsPerSample, drflac_uint32 blockSize, drflac_uint32 order, drflac_int32 shift, const drflac_int32* coefficients, drflac_int32* pDecodedSamples) |
| 4767 | { |
| 4768 | drflac_uint8 residualMethod; |
| 4769 | drflac_uint8 partitionOrder; |
| 4770 | drflac_uint32 samplesInPartition; |
| 4771 | drflac_uint32 partitionsRemaining; |
| 4772 | |
| 4773 | DRFLAC_ASSERT(bs != NULL); |
| 4774 | DRFLAC_ASSERT(blockSize != 0); |
| 4775 | DRFLAC_ASSERT(pDecodedSamples != NULL); /* <-- Should we allow NULL, in which case we just seek past the residual rather than do a full decode? */ |
| 4776 | |
| 4777 | if (!drflac__read_uint8(bs, 2, &residualMethod)) { |
| 4778 | return DRFLAC_FALSE; |
| 4779 | } |
| 4780 | |
| 4781 | if (residualMethod != DRFLAC_RESIDUAL_CODING_METHOD_PARTITIONED_RICE && residualMethod != DRFLAC_RESIDUAL_CODING_METHOD_PARTITIONED_RICE2) { |
| 4782 | return DRFLAC_FALSE; /* Unknown or unsupported residual coding method. */ |
| 4783 | } |
| 4784 | |
| 4785 | /* Ignore the first <order> values. */ |
| 4786 | pDecodedSamples += order; |
| 4787 | |
| 4788 | if (!drflac__read_uint8(bs, 4, &partitionOrder)) { |
| 4789 | return DRFLAC_FALSE; |
| 4790 | } |
| 4791 | |
| 4792 | /* |
| 4793 | From the FLAC spec: |
| 4794 | The Rice partition order in a Rice-coded residual section must be less than or equal to 8. |
| 4795 | */ |
| 4796 | if (partitionOrder > 8) { |
| 4797 | return DRFLAC_FALSE; |
| 4798 | } |
| 4799 | |
| 4800 | /* Validation check. */ |
| 4801 | if ((blockSize / (1 << partitionOrder)) <= order) { |
| 4802 | return DRFLAC_FALSE; |
| 4803 | } |
| 4804 | |
| 4805 | samplesInPartition = (blockSize / (1 << partitionOrder)) - order; |
| 4806 | partitionsRemaining = (1 << partitionOrder); |
| 4807 | for (;;) { |
| 4808 | drflac_uint8 riceParam = 0; |
| 4809 | if (residualMethod == DRFLAC_RESIDUAL_CODING_METHOD_PARTITIONED_RICE) { |
| 4810 | if (!drflac__read_uint8(bs, 4, &riceParam)) { |
| 4811 | return DRFLAC_FALSE; |
| 4812 | } |
| 4813 | if (riceParam == 15) { |
| 4814 | riceParam = 0xFF; |
| 4815 | } |
| 4816 | } else if (residualMethod == DRFLAC_RESIDUAL_CODING_METHOD_PARTITIONED_RICE2) { |
| 4817 | if (!drflac__read_uint8(bs, 5, &riceParam)) { |
| 4818 | return DRFLAC_FALSE; |
| 4819 | } |
| 4820 | if (riceParam == 31) { |
| 4821 | riceParam = 0xFF; |
| 4822 | } |
| 4823 | } |
| 4824 | |
| 4825 | if (riceParam != 0xFF) { |
| 4826 | if (!drflac__decode_samples_with_residual__rice(bs, bitsPerSample, samplesInPartition, riceParam, order, shift, coefficients, pDecodedSamples)) { |
| 4827 | return DRFLAC_FALSE; |
| 4828 | } |
| 4829 | } else { |
| 4830 | drflac_uint8 unencodedBitsPerSample = 0; |
| 4831 | if (!drflac__read_uint8(bs, 5, &unencodedBitsPerSample)) { |
| 4832 | return DRFLAC_FALSE; |
| 4833 | } |
| 4834 | |
| 4835 | if (!drflac__decode_samples_with_residual__unencoded(bs, bitsPerSample, samplesInPartition, unencodedBitsPerSample, order, shift, coefficients, pDecodedSamples)) { |
| 4836 | return DRFLAC_FALSE; |
| 4837 | } |
| 4838 | } |
| 4839 | |
| 4840 | pDecodedSamples += samplesInPartition; |
| 4841 | |
| 4842 | if (partitionsRemaining == 1) { |
| 4843 | break; |
| 4844 | } |
| 4845 | |
| 4846 | partitionsRemaining -= 1; |
| 4847 | |
| 4848 | if (partitionOrder != 0) { |
| 4849 | samplesInPartition = blockSize / (1 << partitionOrder); |
| 4850 | } |
| 4851 | } |
| 4852 | |
| 4853 | return DRFLAC_TRUE; |
| 4854 | } |
| 4855 | |
| 4856 | /* |
| 4857 | Reads and seeks past the residual for the sub-frame the decoder is currently sitting on. This function should be called |
| 4858 | when the decoder is sitting at the very start of the RESIDUAL block. The first <order> residuals will be set to 0. The |
| 4859 | <blockSize> and <order> parameters are used to determine how many residual values need to be decoded. |
| 4860 | */ |
| 4861 | static drflac_bool32 drflac__read_and_seek_residual(drflac_bs* bs, drflac_uint32 blockSize, drflac_uint32 order) |
| 4862 | { |
| 4863 | drflac_uint8 residualMethod; |
| 4864 | drflac_uint8 partitionOrder; |
| 4865 | drflac_uint32 samplesInPartition; |
| 4866 | drflac_uint32 partitionsRemaining; |
| 4867 | |
| 4868 | DRFLAC_ASSERT(bs != NULL); |
| 4869 | DRFLAC_ASSERT(blockSize != 0); |
| 4870 | |
| 4871 | if (!drflac__read_uint8(bs, 2, &residualMethod)) { |
| 4872 | return DRFLAC_FALSE; |
| 4873 | } |
| 4874 | |
| 4875 | if (residualMethod != DRFLAC_RESIDUAL_CODING_METHOD_PARTITIONED_RICE && residualMethod != DRFLAC_RESIDUAL_CODING_METHOD_PARTITIONED_RICE2) { |
| 4876 | return DRFLAC_FALSE; /* Unknown or unsupported residual coding method. */ |
| 4877 | } |
| 4878 | |
| 4879 | if (!drflac__read_uint8(bs, 4, &partitionOrder)) { |
| 4880 | return DRFLAC_FALSE; |
| 4881 | } |
| 4882 | |
| 4883 | /* |
| 4884 | From the FLAC spec: |
| 4885 | The Rice partition order in a Rice-coded residual section must be less than or equal to 8. |
| 4886 | */ |
| 4887 | if (partitionOrder > 8) { |
| 4888 | return DRFLAC_FALSE; |
| 4889 | } |
| 4890 | |
| 4891 | /* Validation check. */ |
| 4892 | if ((blockSize / (1 << partitionOrder)) <= order) { |
| 4893 | return DRFLAC_FALSE; |
| 4894 | } |
| 4895 | |
| 4896 | samplesInPartition = (blockSize / (1 << partitionOrder)) - order; |
| 4897 | partitionsRemaining = (1 << partitionOrder); |
| 4898 | for (;;) |
| 4899 | { |
| 4900 | drflac_uint8 riceParam = 0; |
| 4901 | if (residualMethod == DRFLAC_RESIDUAL_CODING_METHOD_PARTITIONED_RICE) { |
| 4902 | if (!drflac__read_uint8(bs, 4, &riceParam)) { |
| 4903 | return DRFLAC_FALSE; |
| 4904 | } |
| 4905 | if (riceParam == 15) { |
| 4906 | riceParam = 0xFF; |
| 4907 | } |
| 4908 | } else if (residualMethod == DRFLAC_RESIDUAL_CODING_METHOD_PARTITIONED_RICE2) { |
| 4909 | if (!drflac__read_uint8(bs, 5, &riceParam)) { |
| 4910 | return DRFLAC_FALSE; |
| 4911 | } |
| 4912 | if (riceParam == 31) { |
| 4913 | riceParam = 0xFF; |
| 4914 | } |
| 4915 | } |
| 4916 | |
| 4917 | if (riceParam != 0xFF) { |
| 4918 | if (!drflac__read_and_seek_residual__rice(bs, samplesInPartition, riceParam)) { |
| 4919 | return DRFLAC_FALSE; |
| 4920 | } |
| 4921 | } else { |
| 4922 | drflac_uint8 unencodedBitsPerSample = 0; |
| 4923 | if (!drflac__read_uint8(bs, 5, &unencodedBitsPerSample)) { |
| 4924 | return DRFLAC_FALSE; |
| 4925 | } |
| 4926 | |
| 4927 | if (!drflac__seek_bits(bs, unencodedBitsPerSample * samplesInPartition)) { |
| 4928 | return DRFLAC_FALSE; |
| 4929 | } |
| 4930 | } |
| 4931 | |
| 4932 | |
| 4933 | if (partitionsRemaining == 1) { |
| 4934 | break; |
| 4935 | } |
| 4936 | |
| 4937 | partitionsRemaining -= 1; |
| 4938 | samplesInPartition = blockSize / (1 << partitionOrder); |
| 4939 | } |
| 4940 | |
| 4941 | return DRFLAC_TRUE; |
| 4942 | } |
| 4943 | |
| 4944 | |
| 4945 | static drflac_bool32 drflac__decode_samples__constant(drflac_bs* bs, drflac_uint32 blockSize, drflac_uint32 subframeBitsPerSample, drflac_int32* pDecodedSamples) |
| 4946 | { |
| 4947 | drflac_uint32 i; |
| 4948 | |
| 4949 | /* Only a single sample needs to be decoded here. */ |
| 4950 | drflac_int32 sample; |
| 4951 | if (!drflac__read_int32(bs, subframeBitsPerSample, &sample)) { |
| 4952 | return DRFLAC_FALSE; |
| 4953 | } |
| 4954 | |
| 4955 | /* |
| 4956 | We don't really need to expand this, but it does simplify the process of reading samples. If this becomes a performance issue (unlikely) |
| 4957 | we'll want to look at a more efficient way. |
| 4958 | */ |
| 4959 | for (i = 0; i < blockSize; ++i) { |
| 4960 | pDecodedSamples[i] = sample; |
| 4961 | } |
| 4962 | |
| 4963 | return DRFLAC_TRUE; |
| 4964 | } |
| 4965 | |
| 4966 | static drflac_bool32 drflac__decode_samples__verbatim(drflac_bs* bs, drflac_uint32 blockSize, drflac_uint32 subframeBitsPerSample, drflac_int32* pDecodedSamples) |
| 4967 | { |
| 4968 | drflac_uint32 i; |
| 4969 | |
| 4970 | for (i = 0; i < blockSize; ++i) { |
| 4971 | drflac_int32 sample; |
| 4972 | if (!drflac__read_int32(bs, subframeBitsPerSample, &sample)) { |
| 4973 | return DRFLAC_FALSE; |
| 4974 | } |
| 4975 | |
| 4976 | pDecodedSamples[i] = sample; |
| 4977 | } |
| 4978 | |
| 4979 | return DRFLAC_TRUE; |
| 4980 | } |
| 4981 | |
| 4982 | static drflac_bool32 drflac__decode_samples__fixed(drflac_bs* bs, drflac_uint32 blockSize, drflac_uint32 subframeBitsPerSample, drflac_uint8 lpcOrder, drflac_int32* pDecodedSamples) |
| 4983 | { |
| 4984 | drflac_uint32 i; |
| 4985 | |
| 4986 | static drflac_int32 lpcCoefficientsTable[5][4] = { |
| 4987 | {0, 0, 0, 0}, |
| 4988 | {1, 0, 0, 0}, |
| 4989 | {2, -1, 0, 0}, |
| 4990 | {3, -3, 1, 0}, |
| 4991 | {4, -6, 4, -1} |
| 4992 | }; |
| 4993 | |
| 4994 | /* Warm up samples and coefficients. */ |
| 4995 | for (i = 0; i < lpcOrder; ++i) { |
| 4996 | drflac_int32 sample; |
| 4997 | if (!drflac__read_int32(bs, subframeBitsPerSample, &sample)) { |
| 4998 | return DRFLAC_FALSE; |
| 4999 | } |
| 5000 | |
| 5001 | pDecodedSamples[i] = sample; |
| 5002 | } |
| 5003 | |
| 5004 | if (!drflac__decode_samples_with_residual(bs, subframeBitsPerSample, blockSize, lpcOrder, 0, lpcCoefficientsTable[lpcOrder], pDecodedSamples)) { |
| 5005 | return DRFLAC_FALSE; |
| 5006 | } |
| 5007 | |
| 5008 | return DRFLAC_TRUE; |
| 5009 | } |
| 5010 | |
| 5011 | static drflac_bool32 drflac__decode_samples__lpc(drflac_bs* bs, drflac_uint32 blockSize, drflac_uint32 bitsPerSample, drflac_uint8 lpcOrder, drflac_int32* pDecodedSamples) |
| 5012 | { |
| 5013 | drflac_uint8 i; |
| 5014 | drflac_uint8 lpcPrecision; |
| 5015 | drflac_int8 lpcShift; |
| 5016 | drflac_int32 coefficients[32]; |
| 5017 | |
| 5018 | /* Warm up samples. */ |
| 5019 | for (i = 0; i < lpcOrder; ++i) { |
| 5020 | drflac_int32 sample; |
| 5021 | if (!drflac__read_int32(bs, bitsPerSample, &sample)) { |
| 5022 | return DRFLAC_FALSE; |
| 5023 | } |
| 5024 | |
| 5025 | pDecodedSamples[i] = sample; |
| 5026 | } |
| 5027 | |
| 5028 | if (!drflac__read_uint8(bs, 4, &lpcPrecision)) { |
| 5029 | return DRFLAC_FALSE; |
| 5030 | } |
| 5031 | if (lpcPrecision == 15) { |
| 5032 | return DRFLAC_FALSE; /* Invalid. */ |
| 5033 | } |
| 5034 | lpcPrecision += 1; |
| 5035 | |
| 5036 | if (!drflac__read_int8(bs, 5, &lpcShift)) { |
| 5037 | return DRFLAC_FALSE; |
| 5038 | } |
| 5039 | |
| 5040 | /* |
| 5041 | From the FLAC specification: |
| 5042 | |
| 5043 | Quantized linear predictor coefficient shift needed in bits (NOTE: this number is signed two's-complement) |
| 5044 | |
| 5045 | Emphasis on the "signed two's-complement". In practice there does not seem to be any encoders nor decoders supporting negative shifts. For now dr_flac is |
| 5046 | not going to support negative shifts as I don't have any reference files. However, when a reference file comes through I will consider adding support. |
| 5047 | */ |
| 5048 | if (lpcShift < 0) { |
| 5049 | return DRFLAC_FALSE; |
| 5050 | } |
| 5051 | |
| 5052 | DRFLAC_ZERO_MEMORY(coefficients, sizeof(coefficients)); |
| 5053 | for (i = 0; i < lpcOrder; ++i) { |
| 5054 | if (!drflac__read_int32(bs, lpcPrecision, coefficients + i)) { |
| 5055 | return DRFLAC_FALSE; |
| 5056 | } |
| 5057 | } |
| 5058 | |
| 5059 | if (!drflac__decode_samples_with_residual(bs, bitsPerSample, blockSize, lpcOrder, lpcShift, coefficients, pDecodedSamples)) { |
| 5060 | return DRFLAC_FALSE; |
| 5061 | } |
| 5062 | |
| 5063 | return DRFLAC_TRUE; |
| 5064 | } |
| 5065 | |
| 5066 | |
| 5067 | static drflac_bool32 drflac__read_next_flac_frame_header(drflac_bs* bs, drflac_uint8 streaminfoBitsPerSample, drflac_frame_header* header) |
| 5068 | { |
| 5069 | const drflac_uint32 sampleRateTable[12] = {0, 88200, 176400, 192000, 8000, 16000, 22050, 24000, 32000, 44100, 48000, 96000}; |
| 5070 | const drflac_uint8 bitsPerSampleTable[8] = {0, 8, 12, (drflac_uint8)-1, 16, 20, 24, (drflac_uint8)-1}; /* -1 = reserved. */ |
| 5071 | |
| 5072 | DRFLAC_ASSERT(bs != NULL); |
| 5073 | DRFLAC_ASSERT(header != NULL); |
| 5074 | |
| 5075 | /* Keep looping until we find a valid sync code. */ |
| 5076 | for (;;) { |
| 5077 | drflac_uint8 crc8 = 0xCE; /* 0xCE = drflac_crc8(0, 0x3FFE, 14); */ |
| 5078 | drflac_uint8 reserved = 0; |
| 5079 | drflac_uint8 blockingStrategy = 0; |
| 5080 | drflac_uint8 blockSize = 0; |
| 5081 | drflac_uint8 sampleRate = 0; |
| 5082 | drflac_uint8 channelAssignment = 0; |
| 5083 | drflac_uint8 bitsPerSample = 0; |
| 5084 | drflac_bool32 isVariableBlockSize; |
| 5085 | |
| 5086 | if (!drflac__find_and_seek_to_next_sync_code(bs)) { |
| 5087 | return DRFLAC_FALSE; |
| 5088 | } |
| 5089 | |
| 5090 | if (!drflac__read_uint8(bs, 1, &reserved)) { |
| 5091 | return DRFLAC_FALSE; |
| 5092 | } |
| 5093 | if (reserved == 1) { |
| 5094 | continue; |
| 5095 | } |
| 5096 | crc8 = drflac_crc8(crc8, reserved, 1); |
| 5097 | |
| 5098 | if (!drflac__read_uint8(bs, 1, &blockingStrategy)) { |
| 5099 | return DRFLAC_FALSE; |
| 5100 | } |
| 5101 | crc8 = drflac_crc8(crc8, blockingStrategy, 1); |
| 5102 | |
| 5103 | if (!drflac__read_uint8(bs, 4, &blockSize)) { |
| 5104 | return DRFLAC_FALSE; |
| 5105 | } |
| 5106 | if (blockSize == 0) { |
| 5107 | continue; |
| 5108 | } |
| 5109 | crc8 = drflac_crc8(crc8, blockSize, 4); |
| 5110 | |
| 5111 | if (!drflac__read_uint8(bs, 4, &sampleRate)) { |
| 5112 | return DRFLAC_FALSE; |
| 5113 | } |
| 5114 | crc8 = drflac_crc8(crc8, sampleRate, 4); |
| 5115 | |
| 5116 | if (!drflac__read_uint8(bs, 4, &channelAssignment)) { |
| 5117 | return DRFLAC_FALSE; |
| 5118 | } |
| 5119 | if (channelAssignment > 10) { |
| 5120 | continue; |
| 5121 | } |
| 5122 | crc8 = drflac_crc8(crc8, channelAssignment, 4); |
| 5123 | |
| 5124 | if (!drflac__read_uint8(bs, 3, &bitsPerSample)) { |
| 5125 | return DRFLAC_FALSE; |
| 5126 | } |
| 5127 | if (bitsPerSample == 3 || bitsPerSample == 7) { |
| 5128 | continue; |
| 5129 | } |
| 5130 | crc8 = drflac_crc8(crc8, bitsPerSample, 3); |
| 5131 | |
| 5132 | |
| 5133 | if (!drflac__read_uint8(bs, 1, &reserved)) { |
| 5134 | return DRFLAC_FALSE; |
| 5135 | } |
| 5136 | if (reserved == 1) { |
| 5137 | continue; |
| 5138 | } |
| 5139 | crc8 = drflac_crc8(crc8, reserved, 1); |
| 5140 | |
| 5141 | |
| 5142 | isVariableBlockSize = blockingStrategy == 1; |
| 5143 | if (isVariableBlockSize) { |
| 5144 | drflac_uint64 pcmFrameNumber; |
| 5145 | drflac_result result = drflac__read_utf8_coded_number(bs, &pcmFrameNumber, &crc8); |
| 5146 | if (result != DRFLAC_SUCCESS) { |
| 5147 | if (result == DRFLAC_AT_END) { |
| 5148 | return DRFLAC_FALSE; |
| 5149 | } else { |
| 5150 | continue; |
| 5151 | } |
| 5152 | } |
| 5153 | header->flacFrameNumber = 0; |
| 5154 | header->pcmFrameNumber = pcmFrameNumber; |
| 5155 | } else { |
| 5156 | drflac_uint64 flacFrameNumber = 0; |
| 5157 | drflac_result result = drflac__read_utf8_coded_number(bs, &flacFrameNumber, &crc8); |
| 5158 | if (result != DRFLAC_SUCCESS) { |
| 5159 | if (result == DRFLAC_AT_END) { |
| 5160 | return DRFLAC_FALSE; |
| 5161 | } else { |
| 5162 | continue; |
| 5163 | } |
| 5164 | } |
| 5165 | header->flacFrameNumber = (drflac_uint32)flacFrameNumber; /* <-- Safe cast. */ |
| 5166 | header->pcmFrameNumber = 0; |
| 5167 | } |
| 5168 | |
| 5169 | |
| 5170 | DRFLAC_ASSERT(blockSize > 0); |
| 5171 | if (blockSize == 1) { |
| 5172 | header->blockSizeInPCMFrames = 192; |
| 5173 | } else if (blockSize <= 5) { |
| 5174 | DRFLAC_ASSERT(blockSize >= 2); |
| 5175 | header->blockSizeInPCMFrames = 576 * (1 << (blockSize - 2)); |
| 5176 | } else if (blockSize == 6) { |
| 5177 | if (!drflac__read_uint16(bs, 8, &header->blockSizeInPCMFrames)) { |
| 5178 | return DRFLAC_FALSE; |
| 5179 | } |
| 5180 | crc8 = drflac_crc8(crc8, header->blockSizeInPCMFrames, 8); |
| 5181 | header->blockSizeInPCMFrames += 1; |
| 5182 | } else if (blockSize == 7) { |
| 5183 | if (!drflac__read_uint16(bs, 16, &header->blockSizeInPCMFrames)) { |
| 5184 | return DRFLAC_FALSE; |
| 5185 | } |
| 5186 | crc8 = drflac_crc8(crc8, header->blockSizeInPCMFrames, 16); |
| 5187 | header->blockSizeInPCMFrames += 1; |
| 5188 | } else { |
| 5189 | DRFLAC_ASSERT(blockSize >= 8); |
| 5190 | header->blockSizeInPCMFrames = 256 * (1 << (blockSize - 8)); |
| 5191 | } |
| 5192 | |
| 5193 | |
| 5194 | if (sampleRate <= 11) { |
| 5195 | header->sampleRate = sampleRateTable[sampleRate]; |
| 5196 | } else if (sampleRate == 12) { |
| 5197 | if (!drflac__read_uint32(bs, 8, &header->sampleRate)) { |
| 5198 | return DRFLAC_FALSE; |
| 5199 | } |
| 5200 | crc8 = drflac_crc8(crc8, header->sampleRate, 8); |
| 5201 | header->sampleRate *= 1000; |
| 5202 | } else if (sampleRate == 13) { |
| 5203 | if (!drflac__read_uint32(bs, 16, &header->sampleRate)) { |
| 5204 | return DRFLAC_FALSE; |
| 5205 | } |
| 5206 | crc8 = drflac_crc8(crc8, header->sampleRate, 16); |
| 5207 | } else if (sampleRate == 14) { |
| 5208 | if (!drflac__read_uint32(bs, 16, &header->sampleRate)) { |
| 5209 | return DRFLAC_FALSE; |
| 5210 | } |
| 5211 | crc8 = drflac_crc8(crc8, header->sampleRate, 16); |
| 5212 | header->sampleRate *= 10; |
| 5213 | } else { |
| 5214 | continue; /* Invalid. Assume an invalid block. */ |
| 5215 | } |
| 5216 | |
| 5217 | |
| 5218 | header->channelAssignment = channelAssignment; |
| 5219 | |
| 5220 | header->bitsPerSample = bitsPerSampleTable[bitsPerSample]; |
| 5221 | if (header->bitsPerSample == 0) { |
| 5222 | header->bitsPerSample = streaminfoBitsPerSample; |
| 5223 | } |
| 5224 | |
| 5225 | if (!drflac__read_uint8(bs, 8, &header->crc8)) { |
| 5226 | return DRFLAC_FALSE; |
| 5227 | } |
| 5228 | |
| 5229 | #ifndef DR_FLAC_NO_CRC |
| 5230 | if (header->crc8 != crc8) { |
| 5231 | continue; /* CRC mismatch. Loop back to the top and find the next sync code. */ |
| 5232 | } |
| 5233 | #endif |
| 5234 | return DRFLAC_TRUE; |
| 5235 | } |
| 5236 | } |
| 5237 | |
| 5238 | static drflac_bool32 drflac__read_subframe_header(drflac_bs* bs, drflac_subframe* pSubframe) |
| 5239 | { |
| 5240 | drflac_uint8 header; |
| 5241 | int type; |
| 5242 | |
| 5243 | if (!drflac__read_uint8(bs, 8, &header)) { |
| 5244 | return DRFLAC_FALSE; |
| 5245 | } |
| 5246 | |
| 5247 | /* First bit should always be 0. */ |
| 5248 | if ((header & 0x80) != 0) { |
| 5249 | return DRFLAC_FALSE; |
| 5250 | } |
| 5251 | |
| 5252 | type = (header & 0x7E) >> 1; |
| 5253 | if (type == 0) { |
| 5254 | pSubframe->subframeType = DRFLAC_SUBFRAME_CONSTANT; |
| 5255 | } else if (type == 1) { |
| 5256 | pSubframe->subframeType = DRFLAC_SUBFRAME_VERBATIM; |
| 5257 | } else { |
| 5258 | if ((type & 0x20) != 0) { |
| 5259 | pSubframe->subframeType = DRFLAC_SUBFRAME_LPC; |
| 5260 | pSubframe->lpcOrder = (drflac_uint8)(type & 0x1F) + 1; |
| 5261 | } else if ((type & 0x08) != 0) { |
| 5262 | pSubframe->subframeType = DRFLAC_SUBFRAME_FIXED; |
| 5263 | pSubframe->lpcOrder = (drflac_uint8)(type & 0x07); |
| 5264 | if (pSubframe->lpcOrder > 4) { |
| 5265 | pSubframe->subframeType = DRFLAC_SUBFRAME_RESERVED; |
| 5266 | pSubframe->lpcOrder = 0; |
| 5267 | } |
| 5268 | } else { |
| 5269 | pSubframe->subframeType = DRFLAC_SUBFRAME_RESERVED; |
| 5270 | } |
| 5271 | } |
| 5272 | |
| 5273 | if (pSubframe->subframeType == DRFLAC_SUBFRAME_RESERVED) { |
| 5274 | return DRFLAC_FALSE; |
| 5275 | } |
| 5276 | |
| 5277 | /* Wasted bits per sample. */ |
| 5278 | pSubframe->wastedBitsPerSample = 0; |
| 5279 | if ((header & 0x01) == 1) { |
| 5280 | unsigned int wastedBitsPerSample; |
| 5281 | if (!drflac__seek_past_next_set_bit(bs, &wastedBitsPerSample)) { |
| 5282 | return DRFLAC_FALSE; |
| 5283 | } |
| 5284 | pSubframe->wastedBitsPerSample = (drflac_uint8)wastedBitsPerSample + 1; |
| 5285 | } |
| 5286 | |
| 5287 | return DRFLAC_TRUE; |
| 5288 | } |
| 5289 | |
| 5290 | static drflac_bool32 drflac__decode_subframe(drflac_bs* bs, drflac_frame* frame, int subframeIndex, drflac_int32* pDecodedSamplesOut) |
| 5291 | { |
| 5292 | drflac_subframe* pSubframe; |
| 5293 | drflac_uint32 subframeBitsPerSample; |
| 5294 | |
| 5295 | DRFLAC_ASSERT(bs != NULL); |
| 5296 | DRFLAC_ASSERT(frame != NULL); |
| 5297 | |
| 5298 | pSubframe = frame->subframes + subframeIndex; |
| 5299 | if (!drflac__read_subframe_header(bs, pSubframe)) { |
| 5300 | return DRFLAC_FALSE; |
| 5301 | } |
| 5302 | |
| 5303 | /* Side channels require an extra bit per sample. Took a while to figure that one out... */ |
| 5304 | subframeBitsPerSample = frame->header.bitsPerSample; |
| 5305 | if ((frame->header.channelAssignment == DRFLAC_CHANNEL_ASSIGNMENT_LEFT_SIDE || frame->header.channelAssignment == DRFLAC_CHANNEL_ASSIGNMENT_MID_SIDE) && subframeIndex == 1) { |
| 5306 | subframeBitsPerSample += 1; |
| 5307 | } else if (frame->header.channelAssignment == DRFLAC_CHANNEL_ASSIGNMENT_RIGHT_SIDE && subframeIndex == 0) { |
| 5308 | subframeBitsPerSample += 1; |
| 5309 | } |
| 5310 | |
| 5311 | /* Need to handle wasted bits per sample. */ |
| 5312 | if (pSubframe->wastedBitsPerSample >= subframeBitsPerSample) { |
| 5313 | return DRFLAC_FALSE; |
| 5314 | } |
| 5315 | subframeBitsPerSample -= pSubframe->wastedBitsPerSample; |
| 5316 | |
| 5317 | pSubframe->pSamplesS32 = pDecodedSamplesOut; |
| 5318 | |
| 5319 | switch (pSubframe->subframeType) |
| 5320 | { |
| 5321 | case DRFLAC_SUBFRAME_CONSTANT: |
| 5322 | { |
| 5323 | drflac__decode_samples__constant(bs, frame->header.blockSizeInPCMFrames, subframeBitsPerSample, pSubframe->pSamplesS32); |
| 5324 | } break; |
| 5325 | |
| 5326 | case DRFLAC_SUBFRAME_VERBATIM: |
| 5327 | { |
| 5328 | drflac__decode_samples__verbatim(bs, frame->header.blockSizeInPCMFrames, subframeBitsPerSample, pSubframe->pSamplesS32); |
| 5329 | } break; |
| 5330 | |
| 5331 | case DRFLAC_SUBFRAME_FIXED: |
| 5332 | { |
| 5333 | drflac__decode_samples__fixed(bs, frame->header.blockSizeInPCMFrames, subframeBitsPerSample, pSubframe->lpcOrder, pSubframe->pSamplesS32); |
| 5334 | } break; |
| 5335 | |
| 5336 | case DRFLAC_SUBFRAME_LPC: |
| 5337 | { |
| 5338 | drflac__decode_samples__lpc(bs, frame->header.blockSizeInPCMFrames, subframeBitsPerSample, pSubframe->lpcOrder, pSubframe->pSamplesS32); |
| 5339 | } break; |
| 5340 | |
| 5341 | default: return DRFLAC_FALSE; |
| 5342 | } |
| 5343 | |
| 5344 | return DRFLAC_TRUE; |
| 5345 | } |
| 5346 | |
| 5347 | static drflac_bool32 drflac__seek_subframe(drflac_bs* bs, drflac_frame* frame, int subframeIndex) |
| 5348 | { |
| 5349 | drflac_subframe* pSubframe; |
| 5350 | drflac_uint32 subframeBitsPerSample; |
| 5351 | |
| 5352 | DRFLAC_ASSERT(bs != NULL); |
| 5353 | DRFLAC_ASSERT(frame != NULL); |
| 5354 | |
| 5355 | pSubframe = frame->subframes + subframeIndex; |
| 5356 | if (!drflac__read_subframe_header(bs, pSubframe)) { |
| 5357 | return DRFLAC_FALSE; |
| 5358 | } |
| 5359 | |
| 5360 | /* Side channels require an extra bit per sample. Took a while to figure that one out... */ |
| 5361 | subframeBitsPerSample = frame->header.bitsPerSample; |
| 5362 | if ((frame->header.channelAssignment == DRFLAC_CHANNEL_ASSIGNMENT_LEFT_SIDE || frame->header.channelAssignment == DRFLAC_CHANNEL_ASSIGNMENT_MID_SIDE) && subframeIndex == 1) { |
| 5363 | subframeBitsPerSample += 1; |
| 5364 | } else if (frame->header.channelAssignment == DRFLAC_CHANNEL_ASSIGNMENT_RIGHT_SIDE && subframeIndex == 0) { |
| 5365 | subframeBitsPerSample += 1; |
| 5366 | } |
| 5367 | |
| 5368 | /* Need to handle wasted bits per sample. */ |
| 5369 | if (pSubframe->wastedBitsPerSample >= subframeBitsPerSample) { |
| 5370 | return DRFLAC_FALSE; |
| 5371 | } |
| 5372 | subframeBitsPerSample -= pSubframe->wastedBitsPerSample; |
| 5373 | |
| 5374 | pSubframe->pSamplesS32 = NULL; |
| 5375 | |
| 5376 | switch (pSubframe->subframeType) |
| 5377 | { |
| 5378 | case DRFLAC_SUBFRAME_CONSTANT: |
| 5379 | { |
| 5380 | if (!drflac__seek_bits(bs, subframeBitsPerSample)) { |
| 5381 | return DRFLAC_FALSE; |
| 5382 | } |
| 5383 | } break; |
| 5384 | |
| 5385 | case DRFLAC_SUBFRAME_VERBATIM: |
| 5386 | { |
| 5387 | unsigned int bitsToSeek = frame->header.blockSizeInPCMFrames * subframeBitsPerSample; |
| 5388 | if (!drflac__seek_bits(bs, bitsToSeek)) { |
| 5389 | return DRFLAC_FALSE; |
| 5390 | } |
| 5391 | } break; |
| 5392 | |
| 5393 | case DRFLAC_SUBFRAME_FIXED: |
| 5394 | { |
| 5395 | unsigned int bitsToSeek = pSubframe->lpcOrder * subframeBitsPerSample; |
| 5396 | if (!drflac__seek_bits(bs, bitsToSeek)) { |
| 5397 | return DRFLAC_FALSE; |
| 5398 | } |
| 5399 | |
| 5400 | if (!drflac__read_and_seek_residual(bs, frame->header.blockSizeInPCMFrames, pSubframe->lpcOrder)) { |
| 5401 | return DRFLAC_FALSE; |
| 5402 | } |
| 5403 | } break; |
| 5404 | |
| 5405 | case DRFLAC_SUBFRAME_LPC: |
| 5406 | { |
| 5407 | drflac_uint8 lpcPrecision; |
| 5408 | |
| 5409 | unsigned int bitsToSeek = pSubframe->lpcOrder * subframeBitsPerSample; |
| 5410 | if (!drflac__seek_bits(bs, bitsToSeek)) { |
| 5411 | return DRFLAC_FALSE; |
| 5412 | } |
| 5413 | |
| 5414 | if (!drflac__read_uint8(bs, 4, &lpcPrecision)) { |
| 5415 | return DRFLAC_FALSE; |
| 5416 | } |
| 5417 | if (lpcPrecision == 15) { |
| 5418 | return DRFLAC_FALSE; /* Invalid. */ |
| 5419 | } |
| 5420 | lpcPrecision += 1; |
| 5421 | |
| 5422 | |
| 5423 | bitsToSeek = (pSubframe->lpcOrder * lpcPrecision) + 5; /* +5 for shift. */ |
| 5424 | if (!drflac__seek_bits(bs, bitsToSeek)) { |
| 5425 | return DRFLAC_FALSE; |
| 5426 | } |
| 5427 | |
| 5428 | if (!drflac__read_and_seek_residual(bs, frame->header.blockSizeInPCMFrames, pSubframe->lpcOrder)) { |
| 5429 | return DRFLAC_FALSE; |
| 5430 | } |
| 5431 | } break; |
| 5432 | |
| 5433 | default: return DRFLAC_FALSE; |
| 5434 | } |
| 5435 | |
| 5436 | return DRFLAC_TRUE; |
| 5437 | } |
| 5438 | |
| 5439 | |
| 5440 | static DRFLAC_INLINE drflac_uint8 drflac__get_channel_count_from_channel_assignment(drflac_int8 channelAssignment) |
| 5441 | { |
| 5442 | drflac_uint8 lookup[] = {1, 2, 3, 4, 5, 6, 7, 8, 2, 2, 2}; |
| 5443 | |
| 5444 | DRFLAC_ASSERT(channelAssignment <= 10); |
| 5445 | return lookup[channelAssignment]; |
| 5446 | } |
| 5447 | |
| 5448 | static drflac_result drflac__decode_flac_frame(drflac* pFlac) |
| 5449 | { |
| 5450 | int channelCount; |
| 5451 | int i; |
| 5452 | drflac_uint8 paddingSizeInBits; |
| 5453 | drflac_uint16 desiredCRC16; |
| 5454 | #ifndef DR_FLAC_NO_CRC |
| 5455 | drflac_uint16 actualCRC16; |
| 5456 | #endif |
| 5457 | |
| 5458 | /* This function should be called while the stream is sitting on the first byte after the frame header. */ |
| 5459 | DRFLAC_ZERO_MEMORY(pFlac->currentFLACFrame.subframes, sizeof(pFlac->currentFLACFrame.subframes)); |
| 5460 | |
| 5461 | /* The frame block size must never be larger than the maximum block size defined by the FLAC stream. */ |
| 5462 | if (pFlac->currentFLACFrame.header.blockSizeInPCMFrames > pFlac->maxBlockSizeInPCMFrames) { |
| 5463 | return DRFLAC_ERROR; |
| 5464 | } |
| 5465 | |
| 5466 | /* The number of channels in the frame must match the channel count from the STREAMINFO block. */ |
| 5467 | channelCount = drflac__get_channel_count_from_channel_assignment(pFlac->currentFLACFrame.header.channelAssignment); |
| 5468 | if (channelCount != (int)pFlac->channels) { |
| 5469 | return DRFLAC_ERROR; |
| 5470 | } |
| 5471 | |
| 5472 | for (i = 0; i < channelCount; ++i) { |
| 5473 | if (!drflac__decode_subframe(&pFlac->bs, &pFlac->currentFLACFrame, i, pFlac->pDecodedSamples + (pFlac->currentFLACFrame.header.blockSizeInPCMFrames * i))) { |
| 5474 | return DRFLAC_ERROR; |
| 5475 | } |
| 5476 | } |
| 5477 | |
| 5478 | paddingSizeInBits = (drflac_uint8)(DRFLAC_CACHE_L1_BITS_REMAINING(&pFlac->bs) & 7); |
| 5479 | if (paddingSizeInBits > 0) { |
| 5480 | drflac_uint8 padding = 0; |
| 5481 | if (!drflac__read_uint8(&pFlac->bs, paddingSizeInBits, &padding)) { |
| 5482 | return DRFLAC_AT_END; |
| 5483 | } |
| 5484 | } |
| 5485 | |
| 5486 | #ifndef DR_FLAC_NO_CRC |
| 5487 | actualCRC16 = drflac__flush_crc16(&pFlac->bs); |
| 5488 | #endif |
| 5489 | if (!drflac__read_uint16(&pFlac->bs, 16, &desiredCRC16)) { |
| 5490 | return DRFLAC_AT_END; |
| 5491 | } |
| 5492 | |
| 5493 | #ifndef DR_FLAC_NO_CRC |
| 5494 | if (actualCRC16 != desiredCRC16) { |
| 5495 | return DRFLAC_CRC_MISMATCH; /* CRC mismatch. */ |
| 5496 | } |
| 5497 | #endif |
| 5498 | |
| 5499 | pFlac->currentFLACFrame.pcmFramesRemaining = pFlac->currentFLACFrame.header.blockSizeInPCMFrames; |
| 5500 | |
| 5501 | return DRFLAC_SUCCESS; |
| 5502 | } |
| 5503 | |
| 5504 | static drflac_result drflac__seek_flac_frame(drflac* pFlac) |
| 5505 | { |
| 5506 | int channelCount; |
| 5507 | int i; |
| 5508 | drflac_uint16 desiredCRC16; |
| 5509 | #ifndef DR_FLAC_NO_CRC |
| 5510 | drflac_uint16 actualCRC16; |
| 5511 | #endif |
| 5512 | |
| 5513 | channelCount = drflac__get_channel_count_from_channel_assignment(pFlac->currentFLACFrame.header.channelAssignment); |
| 5514 | for (i = 0; i < channelCount; ++i) { |
| 5515 | if (!drflac__seek_subframe(&pFlac->bs, &pFlac->currentFLACFrame, i)) { |
| 5516 | return DRFLAC_ERROR; |
| 5517 | } |
| 5518 | } |
| 5519 | |
| 5520 | /* Padding. */ |
| 5521 | if (!drflac__seek_bits(&pFlac->bs, DRFLAC_CACHE_L1_BITS_REMAINING(&pFlac->bs) & 7)) { |
| 5522 | return DRFLAC_ERROR; |
| 5523 | } |
| 5524 | |
| 5525 | /* CRC. */ |
| 5526 | #ifndef DR_FLAC_NO_CRC |
| 5527 | actualCRC16 = drflac__flush_crc16(&pFlac->bs); |
| 5528 | #endif |
| 5529 | if (!drflac__read_uint16(&pFlac->bs, 16, &desiredCRC16)) { |
| 5530 | return DRFLAC_AT_END; |
| 5531 | } |
| 5532 | |
| 5533 | #ifndef DR_FLAC_NO_CRC |
| 5534 | if (actualCRC16 != desiredCRC16) { |
| 5535 | return DRFLAC_CRC_MISMATCH; /* CRC mismatch. */ |
| 5536 | } |
| 5537 | #endif |
| 5538 | |
| 5539 | return DRFLAC_SUCCESS; |
| 5540 | } |
| 5541 | |
| 5542 | static drflac_bool32 drflac__read_and_decode_next_flac_frame(drflac* pFlac) |
| 5543 | { |
| 5544 | DRFLAC_ASSERT(pFlac != NULL); |
| 5545 | |
| 5546 | for (;;) { |
| 5547 | drflac_result result; |
| 5548 | |
| 5549 | if (!drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFLACFrame.header)) { |
| 5550 | return DRFLAC_FALSE; |
| 5551 | } |
| 5552 | |
| 5553 | result = drflac__decode_flac_frame(pFlac); |
| 5554 | if (result != DRFLAC_SUCCESS) { |
| 5555 | if (result == DRFLAC_CRC_MISMATCH) { |
| 5556 | continue; /* CRC mismatch. Skip to the next frame. */ |
| 5557 | } else { |
| 5558 | return DRFLAC_FALSE; |
| 5559 | } |
| 5560 | } |
| 5561 | |
| 5562 | return DRFLAC_TRUE; |
| 5563 | } |
| 5564 | } |
| 5565 | |
| 5566 | static void drflac__get_pcm_frame_range_of_current_flac_frame(drflac* pFlac, drflac_uint64* pFirstPCMFrame, drflac_uint64* pLastPCMFrame) |
| 5567 | { |
| 5568 | drflac_uint64 firstPCMFrame; |
| 5569 | drflac_uint64 lastPCMFrame; |
| 5570 | |
| 5571 | DRFLAC_ASSERT(pFlac != NULL); |
| 5572 | |
| 5573 | firstPCMFrame = pFlac->currentFLACFrame.header.pcmFrameNumber; |
| 5574 | if (firstPCMFrame == 0) { |
| 5575 | firstPCMFrame = ((drflac_uint64)pFlac->currentFLACFrame.header.flacFrameNumber) * pFlac->maxBlockSizeInPCMFrames; |
| 5576 | } |
| 5577 | |
| 5578 | lastPCMFrame = firstPCMFrame + pFlac->currentFLACFrame.header.blockSizeInPCMFrames; |
| 5579 | if (lastPCMFrame > 0) { |
| 5580 | lastPCMFrame -= 1; /* Needs to be zero based. */ |
| 5581 | } |
| 5582 | |
| 5583 | if (pFirstPCMFrame) { |
| 5584 | *pFirstPCMFrame = firstPCMFrame; |
| 5585 | } |
| 5586 | if (pLastPCMFrame) { |
| 5587 | *pLastPCMFrame = lastPCMFrame; |
| 5588 | } |
| 5589 | } |
| 5590 | |
| 5591 | static drflac_bool32 drflac__seek_to_first_frame(drflac* pFlac) |
| 5592 | { |
| 5593 | drflac_bool32 result; |
| 5594 | |
| 5595 | DRFLAC_ASSERT(pFlac != NULL); |
| 5596 | |
| 5597 | result = drflac__seek_to_byte(&pFlac->bs, pFlac->firstFLACFramePosInBytes); |
| 5598 | |
| 5599 | DRFLAC_ZERO_MEMORY(&pFlac->currentFLACFrame, sizeof(pFlac->currentFLACFrame)); |
| 5600 | pFlac->currentPCMFrame = 0; |
| 5601 | |
| 5602 | return result; |
| 5603 | } |
| 5604 | |
| 5605 | static DRFLAC_INLINE drflac_result drflac__seek_to_next_flac_frame(drflac* pFlac) |
| 5606 | { |
| 5607 | /* This function should only ever be called while the decoder is sitting on the first byte past the FRAME_HEADER section. */ |
| 5608 | DRFLAC_ASSERT(pFlac != NULL); |
| 5609 | return drflac__seek_flac_frame(pFlac); |
| 5610 | } |
| 5611 | |
| 5612 | |
| 5613 | static drflac_uint64 drflac__seek_forward_by_pcm_frames(drflac* pFlac, drflac_uint64 pcmFramesToSeek) |
| 5614 | { |
| 5615 | drflac_uint64 pcmFramesRead = 0; |
| 5616 | while (pcmFramesToSeek > 0) { |
| 5617 | if (pFlac->currentFLACFrame.pcmFramesRemaining == 0) { |
| 5618 | if (!drflac__read_and_decode_next_flac_frame(pFlac)) { |
| 5619 | break; /* Couldn't read the next frame, so just break from the loop and return. */ |
| 5620 | } |
| 5621 | } else { |
| 5622 | if (pFlac->currentFLACFrame.pcmFramesRemaining > pcmFramesToSeek) { |
| 5623 | pcmFramesRead += pcmFramesToSeek; |
| 5624 | pFlac->currentFLACFrame.pcmFramesRemaining -= (drflac_uint32)pcmFramesToSeek; /* <-- Safe cast. Will always be < currentFrame.pcmFramesRemaining < 65536. */ |
| 5625 | pcmFramesToSeek = 0; |
| 5626 | } else { |
| 5627 | pcmFramesRead += pFlac->currentFLACFrame.pcmFramesRemaining; |
| 5628 | pcmFramesToSeek -= pFlac->currentFLACFrame.pcmFramesRemaining; |
| 5629 | pFlac->currentFLACFrame.pcmFramesRemaining = 0; |
| 5630 | } |
| 5631 | } |
| 5632 | } |
| 5633 | |
| 5634 | pFlac->currentPCMFrame += pcmFramesRead; |
| 5635 | return pcmFramesRead; |
| 5636 | } |
| 5637 | |
| 5638 | |
| 5639 | static drflac_bool32 drflac__seek_to_pcm_frame__brute_force(drflac* pFlac, drflac_uint64 pcmFrameIndex) |
| 5640 | { |
| 5641 | drflac_bool32 isMidFrame = DRFLAC_FALSE; |
| 5642 | drflac_uint64 runningPCMFrameCount; |
| 5643 | |
| 5644 | DRFLAC_ASSERT(pFlac != NULL); |
| 5645 | |
| 5646 | /* If we are seeking forward we start from the current position. Otherwise we need to start all the way from the start of the file. */ |
| 5647 | if (pcmFrameIndex >= pFlac->currentPCMFrame) { |
| 5648 | /* Seeking forward. Need to seek from the current position. */ |
| 5649 | runningPCMFrameCount = pFlac->currentPCMFrame; |
| 5650 | |
| 5651 | /* The frame header for the first frame may not yet have been read. We need to do that if necessary. */ |
| 5652 | if (pFlac->currentPCMFrame == 0 && pFlac->currentFLACFrame.pcmFramesRemaining == 0) { |
| 5653 | if (!drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFLACFrame.header)) { |
| 5654 | return DRFLAC_FALSE; |
| 5655 | } |
| 5656 | } else { |
| 5657 | isMidFrame = DRFLAC_TRUE; |
| 5658 | } |
| 5659 | } else { |
| 5660 | /* Seeking backwards. Need to seek from the start of the file. */ |
| 5661 | runningPCMFrameCount = 0; |
| 5662 | |
| 5663 | /* Move back to the start. */ |
| 5664 | if (!drflac__seek_to_first_frame(pFlac)) { |
| 5665 | return DRFLAC_FALSE; |
| 5666 | } |
| 5667 | |
| 5668 | /* Decode the first frame in preparation for sample-exact seeking below. */ |
| 5669 | if (!drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFLACFrame.header)) { |
| 5670 | return DRFLAC_FALSE; |
| 5671 | } |
| 5672 | } |
| 5673 | |
| 5674 | /* |
| 5675 | We need to as quickly as possible find the frame that contains the target sample. To do this, we iterate over each frame and inspect its |
| 5676 | header. If based on the header we can determine that the frame contains the sample, we do a full decode of that frame. |
| 5677 | */ |
| 5678 | for (;;) { |
| 5679 | drflac_uint64 pcmFrameCountInThisFLACFrame; |
| 5680 | drflac_uint64 firstPCMFrameInFLACFrame = 0; |
| 5681 | drflac_uint64 lastPCMFrameInFLACFrame = 0; |
| 5682 | |
| 5683 | drflac__get_pcm_frame_range_of_current_flac_frame(pFlac, &firstPCMFrameInFLACFrame, &lastPCMFrameInFLACFrame); |
| 5684 | |
| 5685 | pcmFrameCountInThisFLACFrame = (lastPCMFrameInFLACFrame - firstPCMFrameInFLACFrame) + 1; |
| 5686 | if (pcmFrameIndex < (runningPCMFrameCount + pcmFrameCountInThisFLACFrame)) { |
| 5687 | /* |
| 5688 | The sample should be in this frame. We need to fully decode it, however if it's an invalid frame (a CRC mismatch), we need to pretend |
| 5689 | it never existed and keep iterating. |
| 5690 | */ |
| 5691 | drflac_uint64 pcmFramesToDecode = pcmFrameIndex - runningPCMFrameCount; |
| 5692 | |
| 5693 | if (!isMidFrame) { |
| 5694 | drflac_result result = drflac__decode_flac_frame(pFlac); |
| 5695 | if (result == DRFLAC_SUCCESS) { |
| 5696 | /* The frame is valid. We just need to skip over some samples to ensure it's sample-exact. */ |
| 5697 | return drflac__seek_forward_by_pcm_frames(pFlac, pcmFramesToDecode) == pcmFramesToDecode; /* <-- If this fails, something bad has happened (it should never fail). */ |
| 5698 | } else { |
| 5699 | if (result == DRFLAC_CRC_MISMATCH) { |
| 5700 | goto next_iteration; /* CRC mismatch. Pretend this frame never existed. */ |
| 5701 | } else { |
| 5702 | return DRFLAC_FALSE; |
| 5703 | } |
| 5704 | } |
| 5705 | } else { |
| 5706 | /* We started seeking mid-frame which means we need to skip the frame decoding part. */ |
| 5707 | return drflac__seek_forward_by_pcm_frames(pFlac, pcmFramesToDecode) == pcmFramesToDecode; |
| 5708 | } |
| 5709 | } else { |
| 5710 | /* |
| 5711 | It's not in this frame. We need to seek past the frame, but check if there was a CRC mismatch. If so, we pretend this |
| 5712 | frame never existed and leave the running sample count untouched. |
| 5713 | */ |
| 5714 | if (!isMidFrame) { |
| 5715 | drflac_result result = drflac__seek_to_next_flac_frame(pFlac); |
| 5716 | if (result == DRFLAC_SUCCESS) { |
| 5717 | runningPCMFrameCount += pcmFrameCountInThisFLACFrame; |
| 5718 | } else { |
| 5719 | if (result == DRFLAC_CRC_MISMATCH) { |
| 5720 | goto next_iteration; /* CRC mismatch. Pretend this frame never existed. */ |
| 5721 | } else { |
| 5722 | return DRFLAC_FALSE; |
| 5723 | } |
| 5724 | } |
| 5725 | } else { |
| 5726 | /* |
| 5727 | We started seeking mid-frame which means we need to seek by reading to the end of the frame instead of with |
| 5728 | drflac__seek_to_next_flac_frame() which only works if the decoder is sitting on the byte just after the frame header. |
| 5729 | */ |
| 5730 | runningPCMFrameCount += pFlac->currentFLACFrame.pcmFramesRemaining; |
| 5731 | pFlac->currentFLACFrame.pcmFramesRemaining = 0; |
| 5732 | isMidFrame = DRFLAC_FALSE; |
| 5733 | } |
| 5734 | |
| 5735 | /* If we are seeking to the end of the file and we've just hit it, we're done. */ |
| 5736 | if (pcmFrameIndex == pFlac->totalPCMFrameCount && runningPCMFrameCount == pFlac->totalPCMFrameCount) { |
| 5737 | return DRFLAC_TRUE; |
| 5738 | } |
| 5739 | } |
| 5740 | |
| 5741 | next_iteration: |
| 5742 | /* Grab the next frame in preparation for the next iteration. */ |
| 5743 | if (!drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFLACFrame.header)) { |
| 5744 | return DRFLAC_FALSE; |
| 5745 | } |
| 5746 | } |
| 5747 | } |
| 5748 | |
| 5749 | |
| 5750 | #if !defined(DR_FLAC_NO_CRC) |
| 5751 | /* |
| 5752 | We use an average compression ratio to determine our approximate start location. FLAC files are generally about 50%-70% the size of their |
| 5753 | uncompressed counterparts so we'll use this as a basis. I'm going to split the middle and use a factor of 0.6 to determine the starting |
| 5754 | location. |
| 5755 | */ |
| 5756 | #define DRFLAC_BINARY_SEARCH_APPROX_COMPRESSION_RATIO 0.6f |
| 5757 | |
| 5758 | static drflac_bool32 drflac__seek_to_approximate_flac_frame_to_byte(drflac* pFlac, drflac_uint64 targetByte, drflac_uint64 rangeLo, drflac_uint64 rangeHi, drflac_uint64* pLastSuccessfulSeekOffset) |
| 5759 | { |
| 5760 | DRFLAC_ASSERT(pFlac != NULL); |
| 5761 | DRFLAC_ASSERT(pLastSuccessfulSeekOffset != NULL); |
| 5762 | DRFLAC_ASSERT(targetByte >= rangeLo); |
| 5763 | DRFLAC_ASSERT(targetByte <= rangeHi); |
| 5764 | |
| 5765 | *pLastSuccessfulSeekOffset = pFlac->firstFLACFramePosInBytes; |
| 5766 | |
| 5767 | for (;;) { |
| 5768 | /* After rangeLo == rangeHi == targetByte fails, we need to break out. */ |
| 5769 | drflac_uint64 lastTargetByte = targetByte; |
| 5770 | |
| 5771 | /* When seeking to a byte, failure probably means we've attempted to seek beyond the end of the stream. To counter this we just halve it each attempt. */ |
| 5772 | if (!drflac__seek_to_byte(&pFlac->bs, targetByte)) { |
| 5773 | /* If we couldn't even seek to the first byte in the stream we have a problem. Just abandon the whole thing. */ |
| 5774 | if (targetByte == 0) { |
| 5775 | drflac__seek_to_first_frame(pFlac); /* Try to recover. */ |
| 5776 | return DRFLAC_FALSE; |
| 5777 | } |
| 5778 | |
| 5779 | /* Halve the byte location and continue. */ |
| 5780 | targetByte = rangeLo + ((rangeHi - rangeLo)/2); |
| 5781 | rangeHi = targetByte; |
| 5782 | } else { |
| 5783 | /* Getting here should mean that we have seeked to an appropriate byte. */ |
| 5784 | |
| 5785 | /* Clear the details of the FLAC frame so we don't misreport data. */ |
| 5786 | DRFLAC_ZERO_MEMORY(&pFlac->currentFLACFrame, sizeof(pFlac->currentFLACFrame)); |
| 5787 | |
| 5788 | /* |
| 5789 | Now seek to the next FLAC frame. We need to decode the entire frame (not just the header) because it's possible for the header to incorrectly pass the |
| 5790 | CRC check and return bad data. We need to decode the entire frame to be more certain. Although this seems unlikely, this has happened to me in testing |
| 5791 | so it needs to stay this way for now. |
| 5792 | */ |
| 5793 | #if 1 |
| 5794 | if (!drflac__read_and_decode_next_flac_frame(pFlac)) { |
| 5795 | /* Halve the byte location and continue. */ |
| 5796 | targetByte = rangeLo + ((rangeHi - rangeLo)/2); |
| 5797 | rangeHi = targetByte; |
| 5798 | } else { |
| 5799 | break; |
| 5800 | } |
| 5801 | #else |
| 5802 | if (!drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFLACFrame.header)) { |
| 5803 | /* Halve the byte location and continue. */ |
| 5804 | targetByte = rangeLo + ((rangeHi - rangeLo)/2); |
| 5805 | rangeHi = targetByte; |
| 5806 | } else { |
| 5807 | break; |
| 5808 | } |
| 5809 | #endif |
| 5810 | } |
| 5811 | |
| 5812 | /* We already tried this byte and there are no more to try, break out. */ |
| 5813 | if(targetByte == lastTargetByte) { |
| 5814 | return DRFLAC_FALSE; |
| 5815 | } |
| 5816 | } |
| 5817 | |
| 5818 | /* The current PCM frame needs to be updated based on the frame we just seeked to. */ |
| 5819 | drflac__get_pcm_frame_range_of_current_flac_frame(pFlac, &pFlac->currentPCMFrame, NULL); |
| 5820 | |
| 5821 | DRFLAC_ASSERT(targetByte <= rangeHi); |
| 5822 | |
| 5823 | *pLastSuccessfulSeekOffset = targetByte; |
| 5824 | return DRFLAC_TRUE; |
| 5825 | } |
| 5826 | |
| 5827 | static drflac_bool32 drflac__decode_flac_frame_and_seek_forward_by_pcm_frames(drflac* pFlac, drflac_uint64 offset) |
| 5828 | { |
| 5829 | /* This section of code would be used if we were only decoding the FLAC frame header when calling drflac__seek_to_approximate_flac_frame_to_byte(). */ |
| 5830 | #if 0 |
| 5831 | if (drflac__decode_flac_frame(pFlac) != DRFLAC_SUCCESS) { |
| 5832 | /* We failed to decode this frame which may be due to it being corrupt. We'll just use the next valid FLAC frame. */ |
| 5833 | if (drflac__read_and_decode_next_flac_frame(pFlac) == DRFLAC_FALSE) { |
| 5834 | return DRFLAC_FALSE; |
| 5835 | } |
| 5836 | } |
| 5837 | #endif |
| 5838 | |
| 5839 | return drflac__seek_forward_by_pcm_frames(pFlac, offset) == offset; |
| 5840 | } |
| 5841 | |
| 5842 | |
| 5843 | static drflac_bool32 drflac__seek_to_pcm_frame__binary_search_internal(drflac* pFlac, drflac_uint64 pcmFrameIndex, drflac_uint64 byteRangeLo, drflac_uint64 byteRangeHi) |
| 5844 | { |
| 5845 | /* This assumes pFlac->currentPCMFrame is sitting on byteRangeLo upon entry. */ |
| 5846 | |
| 5847 | drflac_uint64 targetByte; |
| 5848 | drflac_uint64 pcmRangeLo = pFlac->totalPCMFrameCount; |
| 5849 | drflac_uint64 pcmRangeHi = 0; |
| 5850 | drflac_uint64 lastSuccessfulSeekOffset = (drflac_uint64)-1; |
| 5851 | drflac_uint64 closestSeekOffsetBeforeTargetPCMFrame = byteRangeLo; |
| 5852 | drflac_uint32 seekForwardThreshold = (pFlac->maxBlockSizeInPCMFrames != 0) ? pFlac->maxBlockSizeInPCMFrames*2 : 4096; |
| 5853 | |
| 5854 | targetByte = byteRangeLo + (drflac_uint64)(((drflac_int64)((pcmFrameIndex - pFlac->currentPCMFrame) * pFlac->channels * pFlac->bitsPerSample)/8.0f) * DRFLAC_BINARY_SEARCH_APPROX_COMPRESSION_RATIO); |
| 5855 | if (targetByte > byteRangeHi) { |
| 5856 | targetByte = byteRangeHi; |
| 5857 | } |
| 5858 | |
| 5859 | for (;;) { |
| 5860 | if (drflac__seek_to_approximate_flac_frame_to_byte(pFlac, targetByte, byteRangeLo, byteRangeHi, &lastSuccessfulSeekOffset)) { |
| 5861 | /* We found a FLAC frame. We need to check if it contains the sample we're looking for. */ |
| 5862 | drflac_uint64 newPCMRangeLo; |
| 5863 | drflac_uint64 newPCMRangeHi; |
| 5864 | drflac__get_pcm_frame_range_of_current_flac_frame(pFlac, &newPCMRangeLo, &newPCMRangeHi); |
| 5865 | |
| 5866 | /* If we selected the same frame, it means we should be pretty close. Just decode the rest. */ |
| 5867 | if (pcmRangeLo == newPCMRangeLo) { |
| 5868 | if (!drflac__seek_to_approximate_flac_frame_to_byte(pFlac, closestSeekOffsetBeforeTargetPCMFrame, closestSeekOffsetBeforeTargetPCMFrame, byteRangeHi, &lastSuccessfulSeekOffset)) { |
| 5869 | break; /* Failed to seek to closest frame. */ |
| 5870 | } |
| 5871 | |
| 5872 | if (drflac__decode_flac_frame_and_seek_forward_by_pcm_frames(pFlac, pcmFrameIndex - pFlac->currentPCMFrame)) { |
| 5873 | return DRFLAC_TRUE; |
| 5874 | } else { |
| 5875 | break; /* Failed to seek forward. */ |
| 5876 | } |
| 5877 | } |
| 5878 | |
| 5879 | pcmRangeLo = newPCMRangeLo; |
| 5880 | pcmRangeHi = newPCMRangeHi; |
| 5881 | |
| 5882 | if (pcmRangeLo <= pcmFrameIndex && pcmRangeHi >= pcmFrameIndex) { |
| 5883 | /* The target PCM frame is in this FLAC frame. */ |
| 5884 | if (drflac__decode_flac_frame_and_seek_forward_by_pcm_frames(pFlac, pcmFrameIndex - pFlac->currentPCMFrame) ) { |
| 5885 | return DRFLAC_TRUE; |
| 5886 | } else { |
| 5887 | break; /* Failed to seek to FLAC frame. */ |
| 5888 | } |
| 5889 | } else { |
| 5890 | const float approxCompressionRatio = (drflac_int64)(lastSuccessfulSeekOffset - pFlac->firstFLACFramePosInBytes) / ((drflac_int64)(pcmRangeLo * pFlac->channels * pFlac->bitsPerSample)/8.0f); |
| 5891 | |
| 5892 | if (pcmRangeLo > pcmFrameIndex) { |
| 5893 | /* We seeked too far forward. We need to move our target byte backward and try again. */ |
| 5894 | byteRangeHi = lastSuccessfulSeekOffset; |
| 5895 | if (byteRangeLo > byteRangeHi) { |
| 5896 | byteRangeLo = byteRangeHi; |
| 5897 | } |
| 5898 | |
| 5899 | targetByte = byteRangeLo + ((byteRangeHi - byteRangeLo) / 2); |
| 5900 | if (targetByte < byteRangeLo) { |
| 5901 | targetByte = byteRangeLo; |
| 5902 | } |
| 5903 | } else /*if (pcmRangeHi < pcmFrameIndex)*/ { |
| 5904 | /* We didn't seek far enough. We need to move our target byte forward and try again. */ |
| 5905 | |
| 5906 | /* If we're close enough we can just seek forward. */ |
| 5907 | if ((pcmFrameIndex - pcmRangeLo) < seekForwardThreshold) { |
| 5908 | if (drflac__decode_flac_frame_and_seek_forward_by_pcm_frames(pFlac, pcmFrameIndex - pFlac->currentPCMFrame)) { |
| 5909 | return DRFLAC_TRUE; |
| 5910 | } else { |
| 5911 | break; /* Failed to seek to FLAC frame. */ |
| 5912 | } |
| 5913 | } else { |
| 5914 | byteRangeLo = lastSuccessfulSeekOffset; |
| 5915 | if (byteRangeHi < byteRangeLo) { |
| 5916 | byteRangeHi = byteRangeLo; |
| 5917 | } |
| 5918 | |
| 5919 | targetByte = lastSuccessfulSeekOffset + (drflac_uint64)(((drflac_int64)((pcmFrameIndex-pcmRangeLo) * pFlac->channels * pFlac->bitsPerSample)/8.0f) * approxCompressionRatio); |
| 5920 | if (targetByte > byteRangeHi) { |
| 5921 | targetByte = byteRangeHi; |
| 5922 | } |
| 5923 | |
| 5924 | if (closestSeekOffsetBeforeTargetPCMFrame < lastSuccessfulSeekOffset) { |
| 5925 | closestSeekOffsetBeforeTargetPCMFrame = lastSuccessfulSeekOffset; |
| 5926 | } |
| 5927 | } |
| 5928 | } |
| 5929 | } |
| 5930 | } else { |
| 5931 | /* Getting here is really bad. We just recover as best we can, but moving to the first frame in the stream, and then abort. */ |
| 5932 | break; |
| 5933 | } |
| 5934 | } |
| 5935 | |
| 5936 | drflac__seek_to_first_frame(pFlac); /* <-- Try to recover. */ |
| 5937 | return DRFLAC_FALSE; |
| 5938 | } |
| 5939 | |
| 5940 | static drflac_bool32 drflac__seek_to_pcm_frame__binary_search(drflac* pFlac, drflac_uint64 pcmFrameIndex) |
| 5941 | { |
| 5942 | drflac_uint64 byteRangeLo; |
| 5943 | drflac_uint64 byteRangeHi; |
| 5944 | drflac_uint32 seekForwardThreshold = (pFlac->maxBlockSizeInPCMFrames != 0) ? pFlac->maxBlockSizeInPCMFrames*2 : 4096; |
| 5945 | |
| 5946 | /* Our algorithm currently assumes the FLAC stream is currently sitting at the start. */ |
| 5947 | if (drflac__seek_to_first_frame(pFlac) == DRFLAC_FALSE) { |
| 5948 | return DRFLAC_FALSE; |
| 5949 | } |
| 5950 | |
| 5951 | /* If we're close enough to the start, just move to the start and seek forward. */ |
| 5952 | if (pcmFrameIndex < seekForwardThreshold) { |
| 5953 | return drflac__seek_forward_by_pcm_frames(pFlac, pcmFrameIndex) == pcmFrameIndex; |
| 5954 | } |
| 5955 | |
| 5956 | /* |
| 5957 | Our starting byte range is the byte position of the first FLAC frame and the approximate end of the file as if it were completely uncompressed. This ensures |
| 5958 | the entire file is included, even though most of the time it'll exceed the end of the actual stream. This is OK as the frame searching logic will handle it. |
| 5959 | */ |
| 5960 | byteRangeLo = pFlac->firstFLACFramePosInBytes; |
| 5961 | byteRangeHi = pFlac->firstFLACFramePosInBytes + (drflac_uint64)((drflac_int64)(pFlac->totalPCMFrameCount * pFlac->channels * pFlac->bitsPerSample)/8.0f); |
| 5962 | |
| 5963 | return drflac__seek_to_pcm_frame__binary_search_internal(pFlac, pcmFrameIndex, byteRangeLo, byteRangeHi); |
| 5964 | } |
| 5965 | #endif /* !DR_FLAC_NO_CRC */ |
| 5966 | |
| 5967 | static drflac_bool32 drflac__seek_to_pcm_frame__seek_table(drflac* pFlac, drflac_uint64 pcmFrameIndex) |
| 5968 | { |
| 5969 | drflac_uint32 iClosestSeekpoint = 0; |
| 5970 | drflac_bool32 isMidFrame = DRFLAC_FALSE; |
| 5971 | drflac_uint64 runningPCMFrameCount; |
| 5972 | drflac_uint32 iSeekpoint; |
| 5973 | |
| 5974 | |
| 5975 | DRFLAC_ASSERT(pFlac != NULL); |
| 5976 | |
| 5977 | if (pFlac->pSeekpoints == NULL || pFlac->seekpointCount == 0) { |
| 5978 | return DRFLAC_FALSE; |
| 5979 | } |
| 5980 | |
| 5981 | for (iSeekpoint = 0; iSeekpoint < pFlac->seekpointCount; ++iSeekpoint) { |
| 5982 | if (pFlac->pSeekpoints[iSeekpoint].firstPCMFrame >= pcmFrameIndex) { |
| 5983 | break; |
| 5984 | } |
| 5985 | |
| 5986 | iClosestSeekpoint = iSeekpoint; |
| 5987 | } |
| 5988 | |
| 5989 | /* There's been cases where the seek table contains only zeros. We need to do some basic validation on the closest seekpoint. */ |
| 5990 | if (pFlac->pSeekpoints[iClosestSeekpoint].pcmFrameCount == 0 || pFlac->pSeekpoints[iClosestSeekpoint].pcmFrameCount > pFlac->maxBlockSizeInPCMFrames) { |
| 5991 | return DRFLAC_FALSE; |
| 5992 | } |
| 5993 | if (pFlac->pSeekpoints[iClosestSeekpoint].firstPCMFrame > pFlac->totalPCMFrameCount && pFlac->totalPCMFrameCount > 0) { |
| 5994 | return DRFLAC_FALSE; |
| 5995 | } |
| 5996 | |
| 5997 | #if !defined(DR_FLAC_NO_CRC) |
| 5998 | /* At this point we should know the closest seek point. We can use a binary search for this. We need to know the total sample count for this. */ |
| 5999 | if (pFlac->totalPCMFrameCount > 0) { |
| 6000 | drflac_uint64 byteRangeLo; |
| 6001 | drflac_uint64 byteRangeHi; |
| 6002 | |
| 6003 | byteRangeHi = pFlac->firstFLACFramePosInBytes + (drflac_uint64)((drflac_int64)(pFlac->totalPCMFrameCount * pFlac->channels * pFlac->bitsPerSample)/8.0f); |
| 6004 | byteRangeLo = pFlac->firstFLACFramePosInBytes + pFlac->pSeekpoints[iClosestSeekpoint].flacFrameOffset; |
| 6005 | |
| 6006 | /* |
| 6007 | If our closest seek point is not the last one, we only need to search between it and the next one. The section below calculates an appropriate starting |
| 6008 | value for byteRangeHi which will clamp it appropriately. |
| 6009 | |
| 6010 | Note that the next seekpoint must have an offset greater than the closest seekpoint because otherwise our binary search algorithm will break down. There |
| 6011 | have been cases where a seektable consists of seek points where every byte offset is set to 0 which causes problems. If this happens we need to abort. |
| 6012 | */ |
| 6013 | if (iClosestSeekpoint < pFlac->seekpointCount-1) { |
| 6014 | drflac_uint32 iNextSeekpoint = iClosestSeekpoint + 1; |
| 6015 | |
| 6016 | /* Basic validation on the seekpoints to ensure they're usable. */ |
| 6017 | if (pFlac->pSeekpoints[iClosestSeekpoint].flacFrameOffset >= pFlac->pSeekpoints[iNextSeekpoint].flacFrameOffset || pFlac->pSeekpoints[iNextSeekpoint].pcmFrameCount == 0) { |
| 6018 | return DRFLAC_FALSE; /* The next seekpoint doesn't look right. The seek table cannot be trusted from here. Abort. */ |
| 6019 | } |
| 6020 | |
| 6021 | if (pFlac->pSeekpoints[iNextSeekpoint].firstPCMFrame != (((drflac_uint64)0xFFFFFFFF << 32) | 0xFFFFFFFF)) { /* Make sure it's not a placeholder seekpoint. */ |
| 6022 | byteRangeHi = pFlac->firstFLACFramePosInBytes + pFlac->pSeekpoints[iNextSeekpoint].flacFrameOffset - 1; /* byteRangeHi must be zero based. */ |
| 6023 | } |
| 6024 | } |
| 6025 | |
| 6026 | if (drflac__seek_to_byte(&pFlac->bs, pFlac->firstFLACFramePosInBytes + pFlac->pSeekpoints[iClosestSeekpoint].flacFrameOffset)) { |
| 6027 | if (drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFLACFrame.header)) { |
| 6028 | drflac__get_pcm_frame_range_of_current_flac_frame(pFlac, &pFlac->currentPCMFrame, NULL); |
| 6029 | |
| 6030 | if (drflac__seek_to_pcm_frame__binary_search_internal(pFlac, pcmFrameIndex, byteRangeLo, byteRangeHi)) { |
| 6031 | return DRFLAC_TRUE; |
| 6032 | } |
| 6033 | } |
| 6034 | } |
| 6035 | } |
| 6036 | #endif /* !DR_FLAC_NO_CRC */ |
| 6037 | |
| 6038 | /* Getting here means we need to use a slower algorithm because the binary search method failed or cannot be used. */ |
| 6039 | |
| 6040 | /* |
| 6041 | If we are seeking forward and the closest seekpoint is _before_ the current sample, we just seek forward from where we are. Otherwise we start seeking |
| 6042 | from the seekpoint's first sample. |
| 6043 | */ |
| 6044 | if (pcmFrameIndex >= pFlac->currentPCMFrame && pFlac->pSeekpoints[iClosestSeekpoint].firstPCMFrame <= pFlac->currentPCMFrame) { |
| 6045 | /* Optimized case. Just seek forward from where we are. */ |
| 6046 | runningPCMFrameCount = pFlac->currentPCMFrame; |
| 6047 | |
| 6048 | /* The frame header for the first frame may not yet have been read. We need to do that if necessary. */ |
| 6049 | if (pFlac->currentPCMFrame == 0 && pFlac->currentFLACFrame.pcmFramesRemaining == 0) { |
| 6050 | if (!drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFLACFrame.header)) { |
| 6051 | return DRFLAC_FALSE; |
| 6052 | } |
| 6053 | } else { |
| 6054 | isMidFrame = DRFLAC_TRUE; |
| 6055 | } |
| 6056 | } else { |
| 6057 | /* Slower case. Seek to the start of the seekpoint and then seek forward from there. */ |
| 6058 | runningPCMFrameCount = pFlac->pSeekpoints[iClosestSeekpoint].firstPCMFrame; |
| 6059 | |
| 6060 | if (!drflac__seek_to_byte(&pFlac->bs, pFlac->firstFLACFramePosInBytes + pFlac->pSeekpoints[iClosestSeekpoint].flacFrameOffset)) { |
| 6061 | return DRFLAC_FALSE; |
| 6062 | } |
| 6063 | |
| 6064 | /* Grab the frame the seekpoint is sitting on in preparation for the sample-exact seeking below. */ |
| 6065 | if (!drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFLACFrame.header)) { |
| 6066 | return DRFLAC_FALSE; |
| 6067 | } |
| 6068 | } |
| 6069 | |
| 6070 | for (;;) { |
| 6071 | drflac_uint64 pcmFrameCountInThisFLACFrame; |
| 6072 | drflac_uint64 firstPCMFrameInFLACFrame = 0; |
| 6073 | drflac_uint64 lastPCMFrameInFLACFrame = 0; |
| 6074 | |
| 6075 | drflac__get_pcm_frame_range_of_current_flac_frame(pFlac, &firstPCMFrameInFLACFrame, &lastPCMFrameInFLACFrame); |
| 6076 | |
| 6077 | pcmFrameCountInThisFLACFrame = (lastPCMFrameInFLACFrame - firstPCMFrameInFLACFrame) + 1; |
| 6078 | if (pcmFrameIndex < (runningPCMFrameCount + pcmFrameCountInThisFLACFrame)) { |
| 6079 | /* |
| 6080 | The sample should be in this frame. We need to fully decode it, but if it's an invalid frame (a CRC mismatch) we need to pretend |
| 6081 | it never existed and keep iterating. |
| 6082 | */ |
| 6083 | drflac_uint64 pcmFramesToDecode = pcmFrameIndex - runningPCMFrameCount; |
| 6084 | |
| 6085 | if (!isMidFrame) { |
| 6086 | drflac_result result = drflac__decode_flac_frame(pFlac); |
| 6087 | if (result == DRFLAC_SUCCESS) { |
| 6088 | /* The frame is valid. We just need to skip over some samples to ensure it's sample-exact. */ |
| 6089 | return drflac__seek_forward_by_pcm_frames(pFlac, pcmFramesToDecode) == pcmFramesToDecode; /* <-- If this fails, something bad has happened (it should never fail). */ |
| 6090 | } else { |
| 6091 | if (result == DRFLAC_CRC_MISMATCH) { |
| 6092 | goto next_iteration; /* CRC mismatch. Pretend this frame never existed. */ |
| 6093 | } else { |
| 6094 | return DRFLAC_FALSE; |
| 6095 | } |
| 6096 | } |
| 6097 | } else { |
| 6098 | /* We started seeking mid-frame which means we need to skip the frame decoding part. */ |
| 6099 | return drflac__seek_forward_by_pcm_frames(pFlac, pcmFramesToDecode) == pcmFramesToDecode; |
| 6100 | } |
| 6101 | } else { |
| 6102 | /* |
| 6103 | It's not in this frame. We need to seek past the frame, but check if there was a CRC mismatch. If so, we pretend this |
| 6104 | frame never existed and leave the running sample count untouched. |
| 6105 | */ |
| 6106 | if (!isMidFrame) { |
| 6107 | drflac_result result = drflac__seek_to_next_flac_frame(pFlac); |
| 6108 | if (result == DRFLAC_SUCCESS) { |
| 6109 | runningPCMFrameCount += pcmFrameCountInThisFLACFrame; |
| 6110 | } else { |
| 6111 | if (result == DRFLAC_CRC_MISMATCH) { |
| 6112 | goto next_iteration; /* CRC mismatch. Pretend this frame never existed. */ |
| 6113 | } else { |
| 6114 | return DRFLAC_FALSE; |
| 6115 | } |
| 6116 | } |
| 6117 | } else { |
| 6118 | /* |
| 6119 | We started seeking mid-frame which means we need to seek by reading to the end of the frame instead of with |
| 6120 | drflac__seek_to_next_flac_frame() which only works if the decoder is sitting on the byte just after the frame header. |
| 6121 | */ |
| 6122 | runningPCMFrameCount += pFlac->currentFLACFrame.pcmFramesRemaining; |
| 6123 | pFlac->currentFLACFrame.pcmFramesRemaining = 0; |
| 6124 | isMidFrame = DRFLAC_FALSE; |
| 6125 | } |
| 6126 | |
| 6127 | /* If we are seeking to the end of the file and we've just hit it, we're done. */ |
| 6128 | if (pcmFrameIndex == pFlac->totalPCMFrameCount && runningPCMFrameCount == pFlac->totalPCMFrameCount) { |
| 6129 | return DRFLAC_TRUE; |
| 6130 | } |
| 6131 | } |
| 6132 | |
| 6133 | next_iteration: |
| 6134 | /* Grab the next frame in preparation for the next iteration. */ |
| 6135 | if (!drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFLACFrame.header)) { |
| 6136 | return DRFLAC_FALSE; |
| 6137 | } |
| 6138 | } |
| 6139 | } |
| 6140 | |
| 6141 | |
| 6142 | #ifndef DR_FLAC_NO_OGG |
| 6143 | typedef struct |
| 6144 | { |
| 6145 | drflac_uint8 capturePattern[4]; /* Should be "OggS" */ |
| 6146 | drflac_uint8 structureVersion; /* Always 0. */ |
| 6147 | drflac_uint8 headerType; |
| 6148 | drflac_uint64 granulePosition; |
| 6149 | drflac_uint32 serialNumber; |
| 6150 | drflac_uint32 sequenceNumber; |
| 6151 | drflac_uint32 checksum; |
| 6152 | drflac_uint8 segmentCount; |
| 6153 | drflac_uint8 segmentTable[255]; |
| 6154 | } drflac_ogg_page_header; |
| 6155 | #endif |
| 6156 | |
| 6157 | typedef struct |
| 6158 | { |
| 6159 | drflac_read_proc onRead; |
| 6160 | drflac_seek_proc onSeek; |
| 6161 | drflac_meta_proc onMeta; |
| 6162 | drflac_container container; |
| 6163 | void* pUserData; |
| 6164 | void* pUserDataMD; |
| 6165 | drflac_uint32 sampleRate; |
| 6166 | drflac_uint8 channels; |
| 6167 | drflac_uint8 bitsPerSample; |
| 6168 | drflac_uint64 totalPCMFrameCount; |
| 6169 | drflac_uint16 maxBlockSizeInPCMFrames; |
| 6170 | drflac_uint64 runningFilePos; |
| 6171 | drflac_bool32 hasStreamInfoBlock; |
| 6172 | drflac_bool32 hasMetadataBlocks; |
| 6173 | drflac_bs bs; /* <-- A bit streamer is required for loading data during initialization. */ |
| 6174 | drflac_frame_header firstFrameHeader; /* <-- The header of the first frame that was read during relaxed initalization. Only set if there is no STREAMINFO block. */ |
| 6175 | |
| 6176 | #ifndef DR_FLAC_NO_OGG |
| 6177 | drflac_uint32 oggSerial; |
| 6178 | drflac_uint64 oggFirstBytePos; |
| 6179 | drflac_ogg_page_header oggBosHeader; |
| 6180 | #endif |
| 6181 | } drflac_init_info; |
| 6182 | |
| 6183 | static DRFLAC_INLINE void drflac__decode_block_header(drflac_uint32 blockHeader, drflac_uint8* isLastBlock, drflac_uint8* blockType, drflac_uint32* blockSize) |
| 6184 | { |
| 6185 | blockHeader = drflac__be2host_32(blockHeader); |
| 6186 | *isLastBlock = (drflac_uint8)((blockHeader & 0x80000000UL) >> 31); |
| 6187 | *blockType = (drflac_uint8)((blockHeader & 0x7F000000UL) >> 24); |
| 6188 | *blockSize = (blockHeader & 0x00FFFFFFUL); |
| 6189 | } |
| 6190 | |
| 6191 | static DRFLAC_INLINE drflac_bool32 drflac__read_and_decode_block_header(drflac_read_proc onRead, void* pUserData, drflac_uint8* isLastBlock, drflac_uint8* blockType, drflac_uint32* blockSize) |
| 6192 | { |
| 6193 | drflac_uint32 blockHeader; |
| 6194 | |
| 6195 | *blockSize = 0; |
| 6196 | if (onRead(pUserData, &blockHeader, 4) != 4) { |
| 6197 | return DRFLAC_FALSE; |
| 6198 | } |
| 6199 | |
| 6200 | drflac__decode_block_header(blockHeader, isLastBlock, blockType, blockSize); |
| 6201 | return DRFLAC_TRUE; |
| 6202 | } |
| 6203 | |
| 6204 | static drflac_bool32 drflac__read_streaminfo(drflac_read_proc onRead, void* pUserData, drflac_streaminfo* pStreamInfo) |
| 6205 | { |
| 6206 | drflac_uint32 blockSizes; |
| 6207 | drflac_uint64 frameSizes = 0; |
| 6208 | drflac_uint64 importantProps; |
| 6209 | drflac_uint8 md5[16]; |
| 6210 | |
| 6211 | /* min/max block size. */ |
| 6212 | if (onRead(pUserData, &blockSizes, 4) != 4) { |
| 6213 | return DRFLAC_FALSE; |
| 6214 | } |
| 6215 | |
| 6216 | /* min/max frame size. */ |
| 6217 | if (onRead(pUserData, &frameSizes, 6) != 6) { |
| 6218 | return DRFLAC_FALSE; |
| 6219 | } |
| 6220 | |
| 6221 | /* Sample rate, channels, bits per sample and total sample count. */ |
| 6222 | if (onRead(pUserData, &importantProps, 8) != 8) { |
| 6223 | return DRFLAC_FALSE; |
| 6224 | } |
| 6225 | |
| 6226 | /* MD5 */ |
| 6227 | if (onRead(pUserData, md5, sizeof(md5)) != sizeof(md5)) { |
| 6228 | return DRFLAC_FALSE; |
| 6229 | } |
| 6230 | |
| 6231 | blockSizes = drflac__be2host_32(blockSizes); |
| 6232 | frameSizes = drflac__be2host_64(frameSizes); |
| 6233 | importantProps = drflac__be2host_64(importantProps); |
| 6234 | |
| 6235 | pStreamInfo->minBlockSizeInPCMFrames = (drflac_uint16)((blockSizes & 0xFFFF0000) >> 16); |
| 6236 | pStreamInfo->maxBlockSizeInPCMFrames = (drflac_uint16) (blockSizes & 0x0000FFFF); |
| 6237 | pStreamInfo->minFrameSizeInPCMFrames = (drflac_uint32)((frameSizes & (((drflac_uint64)0x00FFFFFF << 16) << 24)) >> 40); |
| 6238 | pStreamInfo->maxFrameSizeInPCMFrames = (drflac_uint32)((frameSizes & (((drflac_uint64)0x00FFFFFF << 16) << 0)) >> 16); |
| 6239 | pStreamInfo->sampleRate = (drflac_uint32)((importantProps & (((drflac_uint64)0x000FFFFF << 16) << 28)) >> 44); |
| 6240 | pStreamInfo->channels = (drflac_uint8 )((importantProps & (((drflac_uint64)0x0000000E << 16) << 24)) >> 41) + 1; |
| 6241 | pStreamInfo->bitsPerSample = (drflac_uint8 )((importantProps & (((drflac_uint64)0x0000001F << 16) << 20)) >> 36) + 1; |
| 6242 | pStreamInfo->totalPCMFrameCount = ((importantProps & ((((drflac_uint64)0x0000000F << 16) << 16) | 0xFFFFFFFF))); |
| 6243 | DRFLAC_COPY_MEMORY(pStreamInfo->md5, md5, sizeof(md5)); |
| 6244 | |
| 6245 | return DRFLAC_TRUE; |
| 6246 | } |
| 6247 | |
| 6248 | |
| 6249 | static void* drflac__malloc_default(size_t sz, void* pUserData) |
| 6250 | { |
| 6251 | (void)pUserData; |
| 6252 | return DRFLAC_MALLOC(sz); |
| 6253 | } |
| 6254 | |
| 6255 | static void* drflac__realloc_default(void* p, size_t sz, void* pUserData) |
| 6256 | { |
| 6257 | (void)pUserData; |
| 6258 | return DRFLAC_REALLOC(p, sz); |
| 6259 | } |
| 6260 | |
| 6261 | static void drflac__free_default(void* p, void* pUserData) |
| 6262 | { |
| 6263 | (void)pUserData; |
| 6264 | DRFLAC_FREE(p); |
| 6265 | } |
| 6266 | |
| 6267 | |
| 6268 | static void* drflac__malloc_from_callbacks(size_t sz, const drflac_allocation_callbacks* pAllocationCallbacks) |
| 6269 | { |
| 6270 | if (pAllocationCallbacks == NULL) { |
| 6271 | return NULL; |
| 6272 | } |
| 6273 | |
| 6274 | if (pAllocationCallbacks->onMalloc != NULL) { |
| 6275 | return pAllocationCallbacks->onMalloc(sz, pAllocationCallbacks->pUserData); |
| 6276 | } |
| 6277 | |
| 6278 | /* Try using realloc(). */ |
| 6279 | if (pAllocationCallbacks->onRealloc != NULL) { |
| 6280 | return pAllocationCallbacks->onRealloc(NULL, sz, pAllocationCallbacks->pUserData); |
| 6281 | } |
| 6282 | |
| 6283 | return NULL; |
| 6284 | } |
| 6285 | |
| 6286 | static void* drflac__realloc_from_callbacks(void* p, size_t szNew, size_t szOld, const drflac_allocation_callbacks* pAllocationCallbacks) |
| 6287 | { |
| 6288 | if (pAllocationCallbacks == NULL) { |
| 6289 | return NULL; |
| 6290 | } |
| 6291 | |
| 6292 | if (pAllocationCallbacks->onRealloc != NULL) { |
| 6293 | return pAllocationCallbacks->onRealloc(p, szNew, pAllocationCallbacks->pUserData); |
| 6294 | } |
| 6295 | |
| 6296 | /* Try emulating realloc() in terms of malloc()/free(). */ |
| 6297 | if (pAllocationCallbacks->onMalloc != NULL && pAllocationCallbacks->onFree != NULL) { |
| 6298 | void* p2; |
| 6299 | |
| 6300 | p2 = pAllocationCallbacks->onMalloc(szNew, pAllocationCallbacks->pUserData); |
| 6301 | if (p2 == NULL) { |
| 6302 | return NULL; |
| 6303 | } |
| 6304 | |
| 6305 | if (p != NULL) { |
| 6306 | DRFLAC_COPY_MEMORY(p2, p, szOld); |
| 6307 | pAllocationCallbacks->onFree(p, pAllocationCallbacks->pUserData); |
| 6308 | } |
| 6309 | |
| 6310 | return p2; |
| 6311 | } |
| 6312 | |
| 6313 | return NULL; |
| 6314 | } |
| 6315 | |
| 6316 | static void drflac__free_from_callbacks(void* p, const drflac_allocation_callbacks* pAllocationCallbacks) |
| 6317 | { |
| 6318 | if (p == NULL || pAllocationCallbacks == NULL) { |
| 6319 | return; |
| 6320 | } |
| 6321 | |
| 6322 | if (pAllocationCallbacks->onFree != NULL) { |
| 6323 | pAllocationCallbacks->onFree(p, pAllocationCallbacks->pUserData); |
| 6324 | } |
| 6325 | } |
| 6326 | |
| 6327 | |
| 6328 | static drflac_bool32 drflac__read_and_decode_metadata(drflac_read_proc onRead, drflac_seek_proc onSeek, drflac_meta_proc onMeta, void* pUserData, void* pUserDataMD, drflac_uint64* pFirstFramePos, drflac_uint64* pSeektablePos, drflac_uint32* pSeektableSize, drflac_allocation_callbacks* pAllocationCallbacks) |
| 6329 | { |
| 6330 | /* |
| 6331 | We want to keep track of the byte position in the stream of the seektable. At the time of calling this function we know that |
| 6332 | we'll be sitting on byte 42. |
| 6333 | */ |
| 6334 | drflac_uint64 runningFilePos = 42; |
| 6335 | drflac_uint64 seektablePos = 0; |
| 6336 | drflac_uint32 seektableSize = 0; |
| 6337 | |
| 6338 | for (;;) { |
| 6339 | drflac_metadata metadata; |
| 6340 | drflac_uint8 isLastBlock = 0; |
| 6341 | drflac_uint8 blockType; |
| 6342 | drflac_uint32 blockSize; |
| 6343 | if (drflac__read_and_decode_block_header(onRead, pUserData, &isLastBlock, &blockType, &blockSize) == DRFLAC_FALSE) { |
| 6344 | return DRFLAC_FALSE; |
| 6345 | } |
| 6346 | runningFilePos += 4; |
| 6347 | |
| 6348 | metadata.type = blockType; |
| 6349 | metadata.pRawData = NULL; |
| 6350 | metadata.rawDataSize = 0; |
| 6351 | |
| 6352 | switch (blockType) |
| 6353 | { |
| 6354 | case DRFLAC_METADATA_BLOCK_TYPE_APPLICATION: |
| 6355 | { |
| 6356 | if (blockSize < 4) { |
| 6357 | return DRFLAC_FALSE; |
| 6358 | } |
| 6359 | |
| 6360 | if (onMeta) { |
| 6361 | void* pRawData = drflac__malloc_from_callbacks(blockSize, pAllocationCallbacks); |
| 6362 | if (pRawData == NULL) { |
| 6363 | return DRFLAC_FALSE; |
| 6364 | } |
| 6365 | |
| 6366 | if (onRead(pUserData, pRawData, blockSize) != blockSize) { |
| 6367 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
| 6368 | return DRFLAC_FALSE; |
| 6369 | } |
| 6370 | |
| 6371 | metadata.pRawData = pRawData; |
| 6372 | metadata.rawDataSize = blockSize; |
| 6373 | metadata.data.application.id = drflac__be2host_32(*(drflac_uint32*)pRawData); |
| 6374 | metadata.data.application.pData = (const void*)((drflac_uint8*)pRawData + sizeof(drflac_uint32)); |
| 6375 | metadata.data.application.dataSize = blockSize - sizeof(drflac_uint32); |
| 6376 | onMeta(pUserDataMD, &metadata); |
| 6377 | |
| 6378 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
| 6379 | } |
| 6380 | } break; |
| 6381 | |
| 6382 | case DRFLAC_METADATA_BLOCK_TYPE_SEEKTABLE: |
| 6383 | { |
| 6384 | seektablePos = runningFilePos; |
| 6385 | seektableSize = blockSize; |
| 6386 | |
| 6387 | if (onMeta) { |
| 6388 | drflac_uint32 iSeekpoint; |
| 6389 | void* pRawData; |
| 6390 | |
| 6391 | pRawData = drflac__malloc_from_callbacks(blockSize, pAllocationCallbacks); |
| 6392 | if (pRawData == NULL) { |
| 6393 | return DRFLAC_FALSE; |
| 6394 | } |
| 6395 | |
| 6396 | if (onRead(pUserData, pRawData, blockSize) != blockSize) { |
| 6397 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
| 6398 | return DRFLAC_FALSE; |
| 6399 | } |
| 6400 | |
| 6401 | metadata.pRawData = pRawData; |
| 6402 | metadata.rawDataSize = blockSize; |
| 6403 | metadata.data.seektable.seekpointCount = blockSize/sizeof(drflac_seekpoint); |
| 6404 | metadata.data.seektable.pSeekpoints = (const drflac_seekpoint*)pRawData; |
| 6405 | |
| 6406 | /* Endian swap. */ |
| 6407 | for (iSeekpoint = 0; iSeekpoint < metadata.data.seektable.seekpointCount; ++iSeekpoint) { |
| 6408 | drflac_seekpoint* pSeekpoint = (drflac_seekpoint*)pRawData + iSeekpoint; |
| 6409 | pSeekpoint->firstPCMFrame = drflac__be2host_64(pSeekpoint->firstPCMFrame); |
| 6410 | pSeekpoint->flacFrameOffset = drflac__be2host_64(pSeekpoint->flacFrameOffset); |
| 6411 | pSeekpoint->pcmFrameCount = drflac__be2host_16(pSeekpoint->pcmFrameCount); |
| 6412 | } |
| 6413 | |
| 6414 | onMeta(pUserDataMD, &metadata); |
| 6415 | |
| 6416 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
| 6417 | } |
| 6418 | } break; |
| 6419 | |
| 6420 | case DRFLAC_METADATA_BLOCK_TYPE_VORBIS_COMMENT: |
| 6421 | { |
| 6422 | if (blockSize < 8) { |
| 6423 | return DRFLAC_FALSE; |
| 6424 | } |
| 6425 | |
| 6426 | if (onMeta) { |
| 6427 | void* pRawData; |
| 6428 | const char* pRunningData; |
| 6429 | const char* pRunningDataEnd; |
| 6430 | drflac_uint32 i; |
| 6431 | |
| 6432 | pRawData = drflac__malloc_from_callbacks(blockSize, pAllocationCallbacks); |
| 6433 | if (pRawData == NULL) { |
| 6434 | return DRFLAC_FALSE; |
| 6435 | } |
| 6436 | |
| 6437 | if (onRead(pUserData, pRawData, blockSize) != blockSize) { |
| 6438 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
| 6439 | return DRFLAC_FALSE; |
| 6440 | } |
| 6441 | |
| 6442 | metadata.pRawData = pRawData; |
| 6443 | metadata.rawDataSize = blockSize; |
| 6444 | |
| 6445 | pRunningData = (const char*)pRawData; |
| 6446 | pRunningDataEnd = (const char*)pRawData + blockSize; |
| 6447 | |
| 6448 | metadata.data.vorbis_comment.vendorLength = drflac__le2host_32(*(const drflac_uint32*)pRunningData); pRunningData += 4; |
| 6449 | |
| 6450 | /* Need space for the rest of the block */ |
| 6451 | if ((pRunningDataEnd - pRunningData) - 4 < (drflac_int64)metadata.data.vorbis_comment.vendorLength) { /* <-- Note the order of operations to avoid overflow to a valid value */ |
| 6452 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
| 6453 | return DRFLAC_FALSE; |
| 6454 | } |
| 6455 | metadata.data.vorbis_comment.vendor = pRunningData; pRunningData += metadata.data.vorbis_comment.vendorLength; |
| 6456 | metadata.data.vorbis_comment.commentCount = drflac__le2host_32(*(const drflac_uint32*)pRunningData); pRunningData += 4; |
| 6457 | |
| 6458 | /* Need space for 'commentCount' comments after the block, which at minimum is a drflac_uint32 per comment */ |
| 6459 | if ((pRunningDataEnd - pRunningData) / sizeof(drflac_uint32) < metadata.data.vorbis_comment.commentCount) { /* <-- Note the order of operations to avoid overflow to a valid value */ |
| 6460 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
| 6461 | return DRFLAC_FALSE; |
| 6462 | } |
| 6463 | metadata.data.vorbis_comment.pComments = pRunningData; |
| 6464 | |
| 6465 | /* Check that the comments section is valid before passing it to the callback */ |
| 6466 | for (i = 0; i < metadata.data.vorbis_comment.commentCount; ++i) { |
| 6467 | drflac_uint32 commentLength; |
| 6468 | |
| 6469 | if (pRunningDataEnd - pRunningData < 4) { |
| 6470 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
| 6471 | return DRFLAC_FALSE; |
| 6472 | } |
| 6473 | |
| 6474 | commentLength = drflac__le2host_32(*(const drflac_uint32*)pRunningData); pRunningData += 4; |
| 6475 | if (pRunningDataEnd - pRunningData < (drflac_int64)commentLength) { /* <-- Note the order of operations to avoid overflow to a valid value */ |
| 6476 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
| 6477 | return DRFLAC_FALSE; |
| 6478 | } |
| 6479 | pRunningData += commentLength; |
| 6480 | } |
| 6481 | |
| 6482 | onMeta(pUserDataMD, &metadata); |
| 6483 | |
| 6484 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
| 6485 | } |
| 6486 | } break; |
| 6487 | |
| 6488 | case DRFLAC_METADATA_BLOCK_TYPE_CUESHEET: |
| 6489 | { |
| 6490 | if (blockSize < 396) { |
| 6491 | return DRFLAC_FALSE; |
| 6492 | } |
| 6493 | |
| 6494 | if (onMeta) { |
| 6495 | void* pRawData; |
| 6496 | const char* pRunningData; |
| 6497 | const char* pRunningDataEnd; |
| 6498 | drflac_uint8 iTrack; |
| 6499 | drflac_uint8 iIndex; |
| 6500 | |
| 6501 | pRawData = drflac__malloc_from_callbacks(blockSize, pAllocationCallbacks); |
| 6502 | if (pRawData == NULL) { |
| 6503 | return DRFLAC_FALSE; |
| 6504 | } |
| 6505 | |
| 6506 | if (onRead(pUserData, pRawData, blockSize) != blockSize) { |
| 6507 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
| 6508 | return DRFLAC_FALSE; |
| 6509 | } |
| 6510 | |
| 6511 | metadata.pRawData = pRawData; |
| 6512 | metadata.rawDataSize = blockSize; |
| 6513 | |
| 6514 | pRunningData = (const char*)pRawData; |
| 6515 | pRunningDataEnd = (const char*)pRawData + blockSize; |
| 6516 | |
| 6517 | DRFLAC_COPY_MEMORY(metadata.data.cuesheet.catalog, pRunningData, 128); pRunningData += 128; |
| 6518 | metadata.data.cuesheet.leadInSampleCount = drflac__be2host_64(*(const drflac_uint64*)pRunningData); pRunningData += 8; |
| 6519 | metadata.data.cuesheet.isCD = (pRunningData[0] & 0x80) != 0; pRunningData += 259; |
| 6520 | metadata.data.cuesheet.trackCount = pRunningData[0]; pRunningData += 1; |
| 6521 | metadata.data.cuesheet.pTrackData = pRunningData; |
| 6522 | |
| 6523 | /* Check that the cuesheet tracks are valid before passing it to the callback */ |
| 6524 | for (iTrack = 0; iTrack < metadata.data.cuesheet.trackCount; ++iTrack) { |
| 6525 | drflac_uint8 indexCount; |
| 6526 | drflac_uint32 indexPointSize; |
| 6527 | |
| 6528 | if (pRunningDataEnd - pRunningData < 36) { |
| 6529 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
| 6530 | return DRFLAC_FALSE; |
| 6531 | } |
| 6532 | |
| 6533 | /* Skip to the index point count */ |
| 6534 | pRunningData += 35; |
| 6535 | indexCount = pRunningData[0]; pRunningData += 1; |
| 6536 | indexPointSize = indexCount * sizeof(drflac_cuesheet_track_index); |
| 6537 | if (pRunningDataEnd - pRunningData < (drflac_int64)indexPointSize) { |
| 6538 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
| 6539 | return DRFLAC_FALSE; |
| 6540 | } |
| 6541 | |
| 6542 | /* Endian swap. */ |
| 6543 | for (iIndex = 0; iIndex < indexCount; ++iIndex) { |
| 6544 | drflac_cuesheet_track_index* pTrack = (drflac_cuesheet_track_index*)pRunningData; |
| 6545 | pRunningData += sizeof(drflac_cuesheet_track_index); |
| 6546 | pTrack->offset = drflac__be2host_64(pTrack->offset); |
| 6547 | } |
| 6548 | } |
| 6549 | |
| 6550 | onMeta(pUserDataMD, &metadata); |
| 6551 | |
| 6552 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
| 6553 | } |
| 6554 | } break; |
| 6555 | |
| 6556 | case DRFLAC_METADATA_BLOCK_TYPE_PICTURE: |
| 6557 | { |
| 6558 | if (blockSize < 32) { |
| 6559 | return DRFLAC_FALSE; |
| 6560 | } |
| 6561 | |
| 6562 | if (onMeta) { |
| 6563 | void* pRawData; |
| 6564 | const char* pRunningData; |
| 6565 | const char* pRunningDataEnd; |
| 6566 | |
| 6567 | pRawData = drflac__malloc_from_callbacks(blockSize, pAllocationCallbacks); |
| 6568 | if (pRawData == NULL) { |
| 6569 | return DRFLAC_FALSE; |
| 6570 | } |
| 6571 | |
| 6572 | if (onRead(pUserData, pRawData, blockSize) != blockSize) { |
| 6573 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
| 6574 | return DRFLAC_FALSE; |
| 6575 | } |
| 6576 | |
| 6577 | metadata.pRawData = pRawData; |
| 6578 | metadata.rawDataSize = blockSize; |
| 6579 | |
| 6580 | pRunningData = (const char*)pRawData; |
| 6581 | pRunningDataEnd = (const char*)pRawData + blockSize; |
| 6582 | |
| 6583 | metadata.data.picture.type = drflac__be2host_32(*(const drflac_uint32*)pRunningData); pRunningData += 4; |
| 6584 | metadata.data.picture.mimeLength = drflac__be2host_32(*(const drflac_uint32*)pRunningData); pRunningData += 4; |
| 6585 | |
| 6586 | /* Need space for the rest of the block */ |
| 6587 | if ((pRunningDataEnd - pRunningData) - 24 < (drflac_int64)metadata.data.picture.mimeLength) { /* <-- Note the order of operations to avoid overflow to a valid value */ |
| 6588 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
| 6589 | return DRFLAC_FALSE; |
| 6590 | } |
| 6591 | metadata.data.picture.mime = pRunningData; pRunningData += metadata.data.picture.mimeLength; |
| 6592 | metadata.data.picture.descriptionLength = drflac__be2host_32(*(const drflac_uint32*)pRunningData); pRunningData += 4; |
| 6593 | |
| 6594 | /* Need space for the rest of the block */ |
| 6595 | if ((pRunningDataEnd - pRunningData) - 20 < (drflac_int64)metadata.data.picture.descriptionLength) { /* <-- Note the order of operations to avoid overflow to a valid value */ |
| 6596 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
| 6597 | return DRFLAC_FALSE; |
| 6598 | } |
| 6599 | metadata.data.picture.description = pRunningData; pRunningData += metadata.data.picture.descriptionLength; |
| 6600 | metadata.data.picture.width = drflac__be2host_32(*(const drflac_uint32*)pRunningData); pRunningData += 4; |
| 6601 | metadata.data.picture.height = drflac__be2host_32(*(const drflac_uint32*)pRunningData); pRunningData += 4; |
| 6602 | metadata.data.picture.colorDepth = drflac__be2host_32(*(const drflac_uint32*)pRunningData); pRunningData += 4; |
| 6603 | metadata.data.picture.indexColorCount = drflac__be2host_32(*(const drflac_uint32*)pRunningData); pRunningData += 4; |
| 6604 | metadata.data.picture.pictureDataSize = drflac__be2host_32(*(const drflac_uint32*)pRunningData); pRunningData += 4; |
| 6605 | metadata.data.picture.pPictureData = (const drflac_uint8*)pRunningData; |
| 6606 | |
| 6607 | /* Need space for the picture after the block */ |
| 6608 | if (pRunningDataEnd - pRunningData < (drflac_int64)metadata.data.picture.pictureDataSize) { /* <-- Note the order of operations to avoid overflow to a valid value */ |
| 6609 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
| 6610 | return DRFLAC_FALSE; |
| 6611 | } |
| 6612 | |
| 6613 | onMeta(pUserDataMD, &metadata); |
| 6614 | |
| 6615 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
| 6616 | } |
| 6617 | } break; |
| 6618 | |
| 6619 | case DRFLAC_METADATA_BLOCK_TYPE_PADDING: |
| 6620 | { |
| 6621 | if (onMeta) { |
| 6622 | metadata.data.padding.unused = 0; |
| 6623 | |
| 6624 | /* Padding doesn't have anything meaningful in it, so just skip over it, but make sure the caller is aware of it by firing the callback. */ |
| 6625 | if (!onSeek(pUserData, blockSize, drflac_seek_origin_current)) { |
| 6626 | isLastBlock = DRFLAC_TRUE; /* An error occurred while seeking. Attempt to recover by treating this as the last block which will in turn terminate the loop. */ |
| 6627 | } else { |
| 6628 | onMeta(pUserDataMD, &metadata); |
| 6629 | } |
| 6630 | } |
| 6631 | } break; |
| 6632 | |
| 6633 | case DRFLAC_METADATA_BLOCK_TYPE_INVALID: |
| 6634 | { |
| 6635 | /* Invalid chunk. Just skip over this one. */ |
| 6636 | if (onMeta) { |
| 6637 | if (!onSeek(pUserData, blockSize, drflac_seek_origin_current)) { |
| 6638 | isLastBlock = DRFLAC_TRUE; /* An error occurred while seeking. Attempt to recover by treating this as the last block which will in turn terminate the loop. */ |
| 6639 | } |
| 6640 | } |
| 6641 | } break; |
| 6642 | |
| 6643 | default: |
| 6644 | { |
| 6645 | /* |
| 6646 | It's an unknown chunk, but not necessarily invalid. There's a chance more metadata blocks might be defined later on, so we |
| 6647 | can at the very least report the chunk to the application and let it look at the raw data. |
| 6648 | */ |
| 6649 | if (onMeta) { |
| 6650 | void* pRawData = drflac__malloc_from_callbacks(blockSize, pAllocationCallbacks); |
| 6651 | if (pRawData == NULL) { |
| 6652 | return DRFLAC_FALSE; |
| 6653 | } |
| 6654 | |
| 6655 | if (onRead(pUserData, pRawData, blockSize) != blockSize) { |
| 6656 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
| 6657 | return DRFLAC_FALSE; |
| 6658 | } |
| 6659 | |
| 6660 | metadata.pRawData = pRawData; |
| 6661 | metadata.rawDataSize = blockSize; |
| 6662 | onMeta(pUserDataMD, &metadata); |
| 6663 | |
| 6664 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
| 6665 | } |
| 6666 | } break; |
| 6667 | } |
| 6668 | |
| 6669 | /* If we're not handling metadata, just skip over the block. If we are, it will have been handled earlier in the switch statement above. */ |
| 6670 | if (onMeta == NULL && blockSize > 0) { |
| 6671 | if (!onSeek(pUserData, blockSize, drflac_seek_origin_current)) { |
| 6672 | isLastBlock = DRFLAC_TRUE; |
| 6673 | } |
| 6674 | } |
| 6675 | |
| 6676 | runningFilePos += blockSize; |
| 6677 | if (isLastBlock) { |
| 6678 | break; |
| 6679 | } |
| 6680 | } |
| 6681 | |
| 6682 | *pSeektablePos = seektablePos; |
| 6683 | *pSeektableSize = seektableSize; |
| 6684 | *pFirstFramePos = runningFilePos; |
| 6685 | |
| 6686 | return DRFLAC_TRUE; |
| 6687 | } |
| 6688 | |
| 6689 | static drflac_bool32 drflac__init_private__native(drflac_init_info* pInit, drflac_read_proc onRead, drflac_seek_proc onSeek, drflac_meta_proc onMeta, void* pUserData, void* pUserDataMD, drflac_bool32 relaxed) |
| 6690 | { |
| 6691 | /* Pre Condition: The bit stream should be sitting just past the 4-byte id header. */ |
| 6692 | |
| 6693 | drflac_uint8 isLastBlock; |
| 6694 | drflac_uint8 blockType; |
| 6695 | drflac_uint32 blockSize; |
| 6696 | |
| 6697 | (void)onSeek; |
| 6698 | |
| 6699 | pInit->container = drflac_container_native; |
| 6700 | |
| 6701 | /* The first metadata block should be the STREAMINFO block. */ |
| 6702 | if (!drflac__read_and_decode_block_header(onRead, pUserData, &isLastBlock, &blockType, &blockSize)) { |
| 6703 | return DRFLAC_FALSE; |
| 6704 | } |
| 6705 | |
| 6706 | if (blockType != DRFLAC_METADATA_BLOCK_TYPE_STREAMINFO || blockSize != 34) { |
| 6707 | if (!relaxed) { |
| 6708 | /* We're opening in strict mode and the first block is not the STREAMINFO block. Error. */ |
| 6709 | return DRFLAC_FALSE; |
| 6710 | } else { |
| 6711 | /* |
| 6712 | Relaxed mode. To open from here we need to just find the first frame and set the sample rate, etc. to whatever is defined |
| 6713 | for that frame. |
| 6714 | */ |
| 6715 | pInit->hasStreamInfoBlock = DRFLAC_FALSE; |
| 6716 | pInit->hasMetadataBlocks = DRFLAC_FALSE; |
| 6717 | |
| 6718 | if (!drflac__read_next_flac_frame_header(&pInit->bs, 0, &pInit->firstFrameHeader)) { |
| 6719 | return DRFLAC_FALSE; /* Couldn't find a frame. */ |
| 6720 | } |
| 6721 | |
| 6722 | if (pInit->firstFrameHeader.bitsPerSample == 0) { |
| 6723 | return DRFLAC_FALSE; /* Failed to initialize because the first frame depends on the STREAMINFO block, which does not exist. */ |
| 6724 | } |
| 6725 | |
| 6726 | pInit->sampleRate = pInit->firstFrameHeader.sampleRate; |
| 6727 | pInit->channels = drflac__get_channel_count_from_channel_assignment(pInit->firstFrameHeader.channelAssignment); |
| 6728 | pInit->bitsPerSample = pInit->firstFrameHeader.bitsPerSample; |
| 6729 | pInit->maxBlockSizeInPCMFrames = 65535; /* <-- See notes here: https://xiph.org/flac/format.html#metadata_block_streaminfo */ |
| 6730 | return DRFLAC_TRUE; |
| 6731 | } |
| 6732 | } else { |
| 6733 | drflac_streaminfo streaminfo; |
| 6734 | if (!drflac__read_streaminfo(onRead, pUserData, &streaminfo)) { |
| 6735 | return DRFLAC_FALSE; |
| 6736 | } |
| 6737 | |
| 6738 | pInit->hasStreamInfoBlock = DRFLAC_TRUE; |
| 6739 | pInit->sampleRate = streaminfo.sampleRate; |
| 6740 | pInit->channels = streaminfo.channels; |
| 6741 | pInit->bitsPerSample = streaminfo.bitsPerSample; |
| 6742 | pInit->totalPCMFrameCount = streaminfo.totalPCMFrameCount; |
| 6743 | pInit->maxBlockSizeInPCMFrames = streaminfo.maxBlockSizeInPCMFrames; /* Don't care about the min block size - only the max (used for determining the size of the memory allocation). */ |
| 6744 | pInit->hasMetadataBlocks = !isLastBlock; |
| 6745 | |
| 6746 | if (onMeta) { |
| 6747 | drflac_metadata metadata; |
| 6748 | metadata.type = DRFLAC_METADATA_BLOCK_TYPE_STREAMINFO; |
| 6749 | metadata.pRawData = NULL; |
| 6750 | metadata.rawDataSize = 0; |
| 6751 | metadata.data.streaminfo = streaminfo; |
| 6752 | onMeta(pUserDataMD, &metadata); |
| 6753 | } |
| 6754 | |
| 6755 | return DRFLAC_TRUE; |
| 6756 | } |
| 6757 | } |
| 6758 | |
| 6759 | #ifndef DR_FLAC_NO_OGG |
| 6760 | #define DRFLAC_OGG_MAX_PAGE_SIZE 65307 |
| 6761 | #define DRFLAC_OGG_CAPTURE_PATTERN_CRC32 1605413199 /* CRC-32 of "OggS". */ |
| 6762 | |
| 6763 | typedef enum |
| 6764 | { |
| 6765 | drflac_ogg_recover_on_crc_mismatch, |
| 6766 | drflac_ogg_fail_on_crc_mismatch |
| 6767 | } drflac_ogg_crc_mismatch_recovery; |
| 6768 | |
| 6769 | #ifndef DR_FLAC_NO_CRC |
| 6770 | static drflac_uint32 drflac__crc32_table[] = { |
| 6771 | 0x00000000L, 0x04C11DB7L, 0x09823B6EL, 0x0D4326D9L, |
| 6772 | 0x130476DCL, 0x17C56B6BL, 0x1A864DB2L, 0x1E475005L, |
| 6773 | 0x2608EDB8L, 0x22C9F00FL, 0x2F8AD6D6L, 0x2B4BCB61L, |
| 6774 | 0x350C9B64L, 0x31CD86D3L, 0x3C8EA00AL, 0x384FBDBDL, |
| 6775 | 0x4C11DB70L, 0x48D0C6C7L, 0x4593E01EL, 0x4152FDA9L, |
| 6776 | 0x5F15ADACL, 0x5BD4B01BL, 0x569796C2L, 0x52568B75L, |
| 6777 | 0x6A1936C8L, 0x6ED82B7FL, 0x639B0DA6L, 0x675A1011L, |
| 6778 | 0x791D4014L, 0x7DDC5DA3L, 0x709F7B7AL, 0x745E66CDL, |
| 6779 | 0x9823B6E0L, 0x9CE2AB57L, 0x91A18D8EL, 0x95609039L, |
| 6780 | 0x8B27C03CL, 0x8FE6DD8BL, 0x82A5FB52L, 0x8664E6E5L, |
| 6781 | 0xBE2B5B58L, 0xBAEA46EFL, 0xB7A96036L, 0xB3687D81L, |
| 6782 | 0xAD2F2D84L, 0xA9EE3033L, 0xA4AD16EAL, 0xA06C0B5DL, |
| 6783 | 0xD4326D90L, 0xD0F37027L, 0xDDB056FEL, 0xD9714B49L, |
| 6784 | 0xC7361B4CL, 0xC3F706FBL, 0xCEB42022L, 0xCA753D95L, |
| 6785 | 0xF23A8028L, 0xF6FB9D9FL, 0xFBB8BB46L, 0xFF79A6F1L, |
| 6786 | 0xE13EF6F4L, 0xE5FFEB43L, 0xE8BCCD9AL, 0xEC7DD02DL, |
| 6787 | 0x34867077L, 0x30476DC0L, 0x3D044B19L, 0x39C556AEL, |
| 6788 | 0x278206ABL, 0x23431B1CL, 0x2E003DC5L, 0x2AC12072L, |
| 6789 | 0x128E9DCFL, 0x164F8078L, 0x1B0CA6A1L, 0x1FCDBB16L, |
| 6790 | 0x018AEB13L, 0x054BF6A4L, 0x0808D07DL, 0x0CC9CDCAL, |
| 6791 | 0x7897AB07L, 0x7C56B6B0L, 0x71159069L, 0x75D48DDEL, |
| 6792 | 0x6B93DDDBL, 0x6F52C06CL, 0x6211E6B5L, 0x66D0FB02L, |
| 6793 | 0x5E9F46BFL, 0x5A5E5B08L, 0x571D7DD1L, 0x53DC6066L, |
| 6794 | 0x4D9B3063L, 0x495A2DD4L, 0x44190B0DL, 0x40D816BAL, |
| 6795 | 0xACA5C697L, 0xA864DB20L, 0xA527FDF9L, 0xA1E6E04EL, |
| 6796 | 0xBFA1B04BL, 0xBB60ADFCL, 0xB6238B25L, 0xB2E29692L, |
| 6797 | 0x8AAD2B2FL, 0x8E6C3698L, 0x832F1041L, 0x87EE0DF6L, |
| 6798 | 0x99A95DF3L, 0x9D684044L, 0x902B669DL, 0x94EA7B2AL, |
| 6799 | 0xE0B41DE7L, 0xE4750050L, 0xE9362689L, 0xEDF73B3EL, |
| 6800 | 0xF3B06B3BL, 0xF771768CL, 0xFA325055L, 0xFEF34DE2L, |
| 6801 | 0xC6BCF05FL, 0xC27DEDE8L, 0xCF3ECB31L, 0xCBFFD686L, |
| 6802 | 0xD5B88683L, 0xD1799B34L, 0xDC3ABDEDL, 0xD8FBA05AL, |
| 6803 | 0x690CE0EEL, 0x6DCDFD59L, 0x608EDB80L, 0x644FC637L, |
| 6804 | 0x7A089632L, 0x7EC98B85L, 0x738AAD5CL, 0x774BB0EBL, |
| 6805 | 0x4F040D56L, 0x4BC510E1L, 0x46863638L, 0x42472B8FL, |
| 6806 | 0x5C007B8AL, 0x58C1663DL, 0x558240E4L, 0x51435D53L, |
| 6807 | 0x251D3B9EL, 0x21DC2629L, 0x2C9F00F0L, 0x285E1D47L, |
| 6808 | 0x36194D42L, 0x32D850F5L, 0x3F9B762CL, 0x3B5A6B9BL, |
| 6809 | 0x0315D626L, 0x07D4CB91L, 0x0A97ED48L, 0x0E56F0FFL, |
| 6810 | 0x1011A0FAL, 0x14D0BD4DL, 0x19939B94L, 0x1D528623L, |
| 6811 | 0xF12F560EL, 0xF5EE4BB9L, 0xF8AD6D60L, 0xFC6C70D7L, |
| 6812 | 0xE22B20D2L, 0xE6EA3D65L, 0xEBA91BBCL, 0xEF68060BL, |
| 6813 | 0xD727BBB6L, 0xD3E6A601L, 0xDEA580D8L, 0xDA649D6FL, |
| 6814 | 0xC423CD6AL, 0xC0E2D0DDL, 0xCDA1F604L, 0xC960EBB3L, |
| 6815 | 0xBD3E8D7EL, 0xB9FF90C9L, 0xB4BCB610L, 0xB07DABA7L, |
| 6816 | 0xAE3AFBA2L, 0xAAFBE615L, 0xA7B8C0CCL, 0xA379DD7BL, |
| 6817 | 0x9B3660C6L, 0x9FF77D71L, 0x92B45BA8L, 0x9675461FL, |
| 6818 | 0x8832161AL, 0x8CF30BADL, 0x81B02D74L, 0x857130C3L, |
| 6819 | 0x5D8A9099L, 0x594B8D2EL, 0x5408ABF7L, 0x50C9B640L, |
| 6820 | 0x4E8EE645L, 0x4A4FFBF2L, 0x470CDD2BL, 0x43CDC09CL, |
| 6821 | 0x7B827D21L, 0x7F436096L, 0x7200464FL, 0x76C15BF8L, |
| 6822 | 0x68860BFDL, 0x6C47164AL, 0x61043093L, 0x65C52D24L, |
| 6823 | 0x119B4BE9L, 0x155A565EL, 0x18197087L, 0x1CD86D30L, |
| 6824 | 0x029F3D35L, 0x065E2082L, 0x0B1D065BL, 0x0FDC1BECL, |
| 6825 | 0x3793A651L, 0x3352BBE6L, 0x3E119D3FL, 0x3AD08088L, |
| 6826 | 0x2497D08DL, 0x2056CD3AL, 0x2D15EBE3L, 0x29D4F654L, |
| 6827 | 0xC5A92679L, 0xC1683BCEL, 0xCC2B1D17L, 0xC8EA00A0L, |
| 6828 | 0xD6AD50A5L, 0xD26C4D12L, 0xDF2F6BCBL, 0xDBEE767CL, |
| 6829 | 0xE3A1CBC1L, 0xE760D676L, 0xEA23F0AFL, 0xEEE2ED18L, |
| 6830 | 0xF0A5BD1DL, 0xF464A0AAL, 0xF9278673L, 0xFDE69BC4L, |
| 6831 | 0x89B8FD09L, 0x8D79E0BEL, 0x803AC667L, 0x84FBDBD0L, |
| 6832 | 0x9ABC8BD5L, 0x9E7D9662L, 0x933EB0BBL, 0x97FFAD0CL, |
| 6833 | 0xAFB010B1L, 0xAB710D06L, 0xA6322BDFL, 0xA2F33668L, |
| 6834 | 0xBCB4666DL, 0xB8757BDAL, 0xB5365D03L, 0xB1F740B4L |
| 6835 | }; |
| 6836 | #endif |
| 6837 | |
| 6838 | static DRFLAC_INLINE drflac_uint32 drflac_crc32_byte(drflac_uint32 crc32, drflac_uint8 data) |
| 6839 | { |
| 6840 | #ifndef DR_FLAC_NO_CRC |
| 6841 | return (crc32 << 8) ^ drflac__crc32_table[(drflac_uint8)((crc32 >> 24) & 0xFF) ^ data]; |
| 6842 | #else |
| 6843 | (void)data; |
| 6844 | return crc32; |
| 6845 | #endif |
| 6846 | } |
| 6847 | |
| 6848 | #if 0 |
| 6849 | static DRFLAC_INLINE drflac_uint32 drflac_crc32_uint32(drflac_uint32 crc32, drflac_uint32 data) |
| 6850 | { |
| 6851 | crc32 = drflac_crc32_byte(crc32, (drflac_uint8)((data >> 24) & 0xFF)); |
| 6852 | crc32 = drflac_crc32_byte(crc32, (drflac_uint8)((data >> 16) & 0xFF)); |
| 6853 | crc32 = drflac_crc32_byte(crc32, (drflac_uint8)((data >> 8) & 0xFF)); |
| 6854 | crc32 = drflac_crc32_byte(crc32, (drflac_uint8)((data >> 0) & 0xFF)); |
| 6855 | return crc32; |
| 6856 | } |
| 6857 | |
| 6858 | static DRFLAC_INLINE drflac_uint32 drflac_crc32_uint64(drflac_uint32 crc32, drflac_uint64 data) |
| 6859 | { |
| 6860 | crc32 = drflac_crc32_uint32(crc32, (drflac_uint32)((data >> 32) & 0xFFFFFFFF)); |
| 6861 | crc32 = drflac_crc32_uint32(crc32, (drflac_uint32)((data >> 0) & 0xFFFFFFFF)); |
| 6862 | return crc32; |
| 6863 | } |
| 6864 | #endif |
| 6865 | |
| 6866 | static DRFLAC_INLINE drflac_uint32 drflac_crc32_buffer(drflac_uint32 crc32, drflac_uint8* pData, drflac_uint32 dataSize) |
| 6867 | { |
| 6868 | /* This can be optimized. */ |
| 6869 | drflac_uint32 i; |
| 6870 | for (i = 0; i < dataSize; ++i) { |
| 6871 | crc32 = drflac_crc32_byte(crc32, pData[i]); |
| 6872 | } |
| 6873 | return crc32; |
| 6874 | } |
| 6875 | |
| 6876 | |
| 6877 | static DRFLAC_INLINE drflac_bool32 drflac_ogg__is_capture_pattern(drflac_uint8 pattern[4]) |
| 6878 | { |
| 6879 | return pattern[0] == 'O' && pattern[1] == 'g' && pattern[2] == 'g' && pattern[3] == 'S'; |
| 6880 | } |
| 6881 | |
| 6882 | static DRFLAC_INLINE drflac_uint32 drflac_ogg__get_page_header_size(drflac_ogg_page_header* pHeader) |
| 6883 | { |
| 6884 | return 27 + pHeader->segmentCount; |
| 6885 | } |
| 6886 | |
| 6887 | static DRFLAC_INLINE drflac_uint32 drflac_ogg__get_page_body_size(drflac_ogg_page_header* pHeader) |
| 6888 | { |
| 6889 | drflac_uint32 pageBodySize = 0; |
| 6890 | int i; |
| 6891 | |
| 6892 | for (i = 0; i < pHeader->segmentCount; ++i) { |
| 6893 | pageBodySize += pHeader->segmentTable[i]; |
| 6894 | } |
| 6895 | |
| 6896 | return pageBodySize; |
| 6897 | } |
| 6898 | |
| 6899 | static drflac_result drflac_ogg__read_page_header_after_capture_pattern(drflac_read_proc onRead, void* pUserData, drflac_ogg_page_header* pHeader, drflac_uint32* pBytesRead, drflac_uint32* pCRC32) |
| 6900 | { |
| 6901 | drflac_uint8 data[23]; |
| 6902 | drflac_uint32 i; |
| 6903 | |
| 6904 | DRFLAC_ASSERT(*pCRC32 == DRFLAC_OGG_CAPTURE_PATTERN_CRC32); |
| 6905 | |
| 6906 | if (onRead(pUserData, data, 23) != 23) { |
| 6907 | return DRFLAC_AT_END; |
| 6908 | } |
| 6909 | *pBytesRead += 23; |
| 6910 | |
| 6911 | /* |
| 6912 | It's not actually used, but set the capture pattern to 'OggS' for completeness. Not doing this will cause static analysers to complain about |
| 6913 | us trying to access uninitialized data. We could alternatively just comment out this member of the drflac_ogg_page_header structure, but I |
| 6914 | like to have it map to the structure of the underlying data. |
| 6915 | */ |
| 6916 | pHeader->capturePattern[0] = 'O'; |
| 6917 | pHeader->capturePattern[1] = 'g'; |
| 6918 | pHeader->capturePattern[2] = 'g'; |
| 6919 | pHeader->capturePattern[3] = 'S'; |
| 6920 | |
| 6921 | pHeader->structureVersion = data[0]; |
| 6922 | pHeader->headerType = data[1]; |
| 6923 | DRFLAC_COPY_MEMORY(&pHeader->granulePosition, &data[ 2], 8); |
| 6924 | DRFLAC_COPY_MEMORY(&pHeader->serialNumber, &data[10], 4); |
| 6925 | DRFLAC_COPY_MEMORY(&pHeader->sequenceNumber, &data[14], 4); |
| 6926 | DRFLAC_COPY_MEMORY(&pHeader->checksum, &data[18], 4); |
| 6927 | pHeader->segmentCount = data[22]; |
| 6928 | |
| 6929 | /* Calculate the CRC. Note that for the calculation the checksum part of the page needs to be set to 0. */ |
| 6930 | data[18] = 0; |
| 6931 | data[19] = 0; |
| 6932 | data[20] = 0; |
| 6933 | data[21] = 0; |
| 6934 | |
| 6935 | for (i = 0; i < 23; ++i) { |
| 6936 | *pCRC32 = drflac_crc32_byte(*pCRC32, data[i]); |
| 6937 | } |
| 6938 | |
| 6939 | |
| 6940 | if (onRead(pUserData, pHeader->segmentTable, pHeader->segmentCount) != pHeader->segmentCount) { |
| 6941 | return DRFLAC_AT_END; |
| 6942 | } |
| 6943 | *pBytesRead += pHeader->segmentCount; |
| 6944 | |
| 6945 | for (i = 0; i < pHeader->segmentCount; ++i) { |
| 6946 | *pCRC32 = drflac_crc32_byte(*pCRC32, pHeader->segmentTable[i]); |
| 6947 | } |
| 6948 | |
| 6949 | return DRFLAC_SUCCESS; |
| 6950 | } |
| 6951 | |
| 6952 | static drflac_result drflac_ogg__read_page_header(drflac_read_proc onRead, void* pUserData, drflac_ogg_page_header* pHeader, drflac_uint32* pBytesRead, drflac_uint32* pCRC32) |
| 6953 | { |
| 6954 | drflac_uint8 id[4]; |
| 6955 | |
| 6956 | *pBytesRead = 0; |
| 6957 | |
| 6958 | if (onRead(pUserData, id, 4) != 4) { |
| 6959 | return DRFLAC_AT_END; |
| 6960 | } |
| 6961 | *pBytesRead += 4; |
| 6962 | |
| 6963 | /* We need to read byte-by-byte until we find the OggS capture pattern. */ |
| 6964 | for (;;) { |
| 6965 | if (drflac_ogg__is_capture_pattern(id)) { |
| 6966 | drflac_result result; |
| 6967 | |
| 6968 | *pCRC32 = DRFLAC_OGG_CAPTURE_PATTERN_CRC32; |
| 6969 | |
| 6970 | result = drflac_ogg__read_page_header_after_capture_pattern(onRead, pUserData, pHeader, pBytesRead, pCRC32); |
| 6971 | if (result == DRFLAC_SUCCESS) { |
| 6972 | return DRFLAC_SUCCESS; |
| 6973 | } else { |
| 6974 | if (result == DRFLAC_CRC_MISMATCH) { |
| 6975 | continue; |
| 6976 | } else { |
| 6977 | return result; |
| 6978 | } |
| 6979 | } |
| 6980 | } else { |
| 6981 | /* The first 4 bytes did not equal the capture pattern. Read the next byte and try again. */ |
| 6982 | id[0] = id[1]; |
| 6983 | id[1] = id[2]; |
| 6984 | id[2] = id[3]; |
| 6985 | if (onRead(pUserData, &id[3], 1) != 1) { |
| 6986 | return DRFLAC_AT_END; |
| 6987 | } |
| 6988 | *pBytesRead += 1; |
| 6989 | } |
| 6990 | } |
| 6991 | } |
| 6992 | |
| 6993 | |
| 6994 | /* |
| 6995 | The main part of the Ogg encapsulation is the conversion from the physical Ogg bitstream to the native FLAC bitstream. It works |
| 6996 | in three general stages: Ogg Physical Bitstream -> Ogg/FLAC Logical Bitstream -> FLAC Native Bitstream. dr_flac is designed |
| 6997 | in such a way that the core sections assume everything is delivered in native format. Therefore, for each encapsulation type |
| 6998 | dr_flac is supporting there needs to be a layer sitting on top of the onRead and onSeek callbacks that ensures the bits read from |
| 6999 | the physical Ogg bitstream are converted and delivered in native FLAC format. |
| 7000 | */ |
| 7001 | typedef struct |
| 7002 | { |
| 7003 | drflac_read_proc onRead; /* The original onRead callback from drflac_open() and family. */ |
| 7004 | drflac_seek_proc onSeek; /* The original onSeek callback from drflac_open() and family. */ |
| 7005 | void* pUserData; /* The user data passed on onRead and onSeek. This is the user data that was passed on drflac_open() and family. */ |
| 7006 | drflac_uint64 currentBytePos; /* The position of the byte we are sitting on in the physical byte stream. Used for efficient seeking. */ |
| 7007 | drflac_uint64 firstBytePos; /* The position of the first byte in the physical bitstream. Points to the start of the "OggS" identifier of the FLAC bos page. */ |
| 7008 | drflac_uint32 serialNumber; /* The serial number of the FLAC audio pages. This is determined by the initial header page that was read during initialization. */ |
| 7009 | drflac_ogg_page_header bosPageHeader; /* Used for seeking. */ |
| 7010 | drflac_ogg_page_header currentPageHeader; |
| 7011 | drflac_uint32 bytesRemainingInPage; |
| 7012 | drflac_uint32 pageDataSize; |
| 7013 | drflac_uint8 pageData[DRFLAC_OGG_MAX_PAGE_SIZE]; |
| 7014 | } drflac_oggbs; /* oggbs = Ogg Bitstream */ |
| 7015 | |
| 7016 | static size_t drflac_oggbs__read_physical(drflac_oggbs* oggbs, void* bufferOut, size_t bytesToRead) |
| 7017 | { |
| 7018 | size_t bytesActuallyRead = oggbs->onRead(oggbs->pUserData, bufferOut, bytesToRead); |
| 7019 | oggbs->currentBytePos += bytesActuallyRead; |
| 7020 | |
| 7021 | return bytesActuallyRead; |
| 7022 | } |
| 7023 | |
| 7024 | static drflac_bool32 drflac_oggbs__seek_physical(drflac_oggbs* oggbs, drflac_uint64 offset, drflac_seek_origin origin) |
| 7025 | { |
| 7026 | if (origin == drflac_seek_origin_start) { |
| 7027 | if (offset <= 0x7FFFFFFF) { |
| 7028 | if (!oggbs->onSeek(oggbs->pUserData, (int)offset, drflac_seek_origin_start)) { |
| 7029 | return DRFLAC_FALSE; |
| 7030 | } |
| 7031 | oggbs->currentBytePos = offset; |
| 7032 | |
| 7033 | return DRFLAC_TRUE; |
| 7034 | } else { |
| 7035 | if (!oggbs->onSeek(oggbs->pUserData, 0x7FFFFFFF, drflac_seek_origin_start)) { |
| 7036 | return DRFLAC_FALSE; |
| 7037 | } |
| 7038 | oggbs->currentBytePos = offset; |
| 7039 | |
| 7040 | return drflac_oggbs__seek_physical(oggbs, offset - 0x7FFFFFFF, drflac_seek_origin_current); |
| 7041 | } |
| 7042 | } else { |
| 7043 | while (offset > 0x7FFFFFFF) { |
| 7044 | if (!oggbs->onSeek(oggbs->pUserData, 0x7FFFFFFF, drflac_seek_origin_current)) { |
| 7045 | return DRFLAC_FALSE; |
| 7046 | } |
| 7047 | oggbs->currentBytePos += 0x7FFFFFFF; |
| 7048 | offset -= 0x7FFFFFFF; |
| 7049 | } |
| 7050 | |
| 7051 | if (!oggbs->onSeek(oggbs->pUserData, (int)offset, drflac_seek_origin_current)) { /* <-- Safe cast thanks to the loop above. */ |
| 7052 | return DRFLAC_FALSE; |
| 7053 | } |
| 7054 | oggbs->currentBytePos += offset; |
| 7055 | |
| 7056 | return DRFLAC_TRUE; |
| 7057 | } |
| 7058 | } |
| 7059 | |
| 7060 | static drflac_bool32 drflac_oggbs__goto_next_page(drflac_oggbs* oggbs, drflac_ogg_crc_mismatch_recovery recoveryMethod) |
| 7061 | { |
| 7062 | drflac_ogg_page_header header; |
| 7063 | for (;;) { |
| 7064 | drflac_uint32 crc32 = 0; |
| 7065 | drflac_uint32 bytesRead; |
| 7066 | drflac_uint32 pageBodySize; |
| 7067 | #ifndef DR_FLAC_NO_CRC |
| 7068 | drflac_uint32 actualCRC32; |
| 7069 | #endif |
| 7070 | |
| 7071 | if (drflac_ogg__read_page_header(oggbs->onRead, oggbs->pUserData, &header, &bytesRead, &crc32) != DRFLAC_SUCCESS) { |
| 7072 | return DRFLAC_FALSE; |
| 7073 | } |
| 7074 | oggbs->currentBytePos += bytesRead; |
| 7075 | |
| 7076 | pageBodySize = drflac_ogg__get_page_body_size(&header); |
| 7077 | if (pageBodySize > DRFLAC_OGG_MAX_PAGE_SIZE) { |
| 7078 | continue; /* Invalid page size. Assume it's corrupted and just move to the next page. */ |
| 7079 | } |
| 7080 | |
| 7081 | if (header.serialNumber != oggbs->serialNumber) { |
| 7082 | /* It's not a FLAC page. Skip it. */ |
| 7083 | if (pageBodySize > 0 && !drflac_oggbs__seek_physical(oggbs, pageBodySize, drflac_seek_origin_current)) { |
| 7084 | return DRFLAC_FALSE; |
| 7085 | } |
| 7086 | continue; |
| 7087 | } |
| 7088 | |
| 7089 | |
| 7090 | /* We need to read the entire page and then do a CRC check on it. If there's a CRC mismatch we need to skip this page. */ |
| 7091 | if (drflac_oggbs__read_physical(oggbs, oggbs->pageData, pageBodySize) != pageBodySize) { |
| 7092 | return DRFLAC_FALSE; |
| 7093 | } |
| 7094 | oggbs->pageDataSize = pageBodySize; |
| 7095 | |
| 7096 | #ifndef DR_FLAC_NO_CRC |
| 7097 | actualCRC32 = drflac_crc32_buffer(crc32, oggbs->pageData, oggbs->pageDataSize); |
| 7098 | if (actualCRC32 != header.checksum) { |
| 7099 | if (recoveryMethod == drflac_ogg_recover_on_crc_mismatch) { |
| 7100 | continue; /* CRC mismatch. Skip this page. */ |
| 7101 | } else { |
| 7102 | /* |
| 7103 | Even though we are failing on a CRC mismatch, we still want our stream to be in a good state. Therefore we |
| 7104 | go to the next valid page to ensure we're in a good state, but return false to let the caller know that the |
| 7105 | seek did not fully complete. |
| 7106 | */ |
| 7107 | drflac_oggbs__goto_next_page(oggbs, drflac_ogg_recover_on_crc_mismatch); |
| 7108 | return DRFLAC_FALSE; |
| 7109 | } |
| 7110 | } |
| 7111 | #else |
| 7112 | (void)recoveryMethod; /* <-- Silence a warning. */ |
| 7113 | #endif |
| 7114 | |
| 7115 | oggbs->currentPageHeader = header; |
| 7116 | oggbs->bytesRemainingInPage = pageBodySize; |
| 7117 | return DRFLAC_TRUE; |
| 7118 | } |
| 7119 | } |
| 7120 | |
| 7121 | /* Function below is unused at the moment, but I might be re-adding it later. */ |
| 7122 | #if 0 |
| 7123 | static drflac_uint8 drflac_oggbs__get_current_segment_index(drflac_oggbs* oggbs, drflac_uint8* pBytesRemainingInSeg) |
| 7124 | { |
| 7125 | drflac_uint32 bytesConsumedInPage = drflac_ogg__get_page_body_size(&oggbs->currentPageHeader) - oggbs->bytesRemainingInPage; |
| 7126 | drflac_uint8 iSeg = 0; |
| 7127 | drflac_uint32 iByte = 0; |
| 7128 | while (iByte < bytesConsumedInPage) { |
| 7129 | drflac_uint8 segmentSize = oggbs->currentPageHeader.segmentTable[iSeg]; |
| 7130 | if (iByte + segmentSize > bytesConsumedInPage) { |
| 7131 | break; |
| 7132 | } else { |
| 7133 | iSeg += 1; |
| 7134 | iByte += segmentSize; |
| 7135 | } |
| 7136 | } |
| 7137 | |
| 7138 | *pBytesRemainingInSeg = oggbs->currentPageHeader.segmentTable[iSeg] - (drflac_uint8)(bytesConsumedInPage - iByte); |
| 7139 | return iSeg; |
| 7140 | } |
| 7141 | |
| 7142 | static drflac_bool32 drflac_oggbs__seek_to_next_packet(drflac_oggbs* oggbs) |
| 7143 | { |
| 7144 | /* The current packet ends when we get to the segment with a lacing value of < 255 which is not at the end of a page. */ |
| 7145 | for (;;) { |
| 7146 | drflac_bool32 atEndOfPage = DRFLAC_FALSE; |
| 7147 | |
| 7148 | drflac_uint8 bytesRemainingInSeg; |
| 7149 | drflac_uint8 iFirstSeg = drflac_oggbs__get_current_segment_index(oggbs, &bytesRemainingInSeg); |
| 7150 | |
| 7151 | drflac_uint32 bytesToEndOfPacketOrPage = bytesRemainingInSeg; |
| 7152 | for (drflac_uint8 iSeg = iFirstSeg; iSeg < oggbs->currentPageHeader.segmentCount; ++iSeg) { |
| 7153 | drflac_uint8 segmentSize = oggbs->currentPageHeader.segmentTable[iSeg]; |
| 7154 | if (segmentSize < 255) { |
| 7155 | if (iSeg == oggbs->currentPageHeader.segmentCount-1) { |
| 7156 | atEndOfPage = DRFLAC_TRUE; |
| 7157 | } |
| 7158 | |
| 7159 | break; |
| 7160 | } |
| 7161 | |
| 7162 | bytesToEndOfPacketOrPage += segmentSize; |
| 7163 | } |
| 7164 | |
| 7165 | /* |
| 7166 | At this point we will have found either the packet or the end of the page. If were at the end of the page we'll |
| 7167 | want to load the next page and keep searching for the end of the packet. |
| 7168 | */ |
| 7169 | drflac_oggbs__seek_physical(oggbs, bytesToEndOfPacketOrPage, drflac_seek_origin_current); |
| 7170 | oggbs->bytesRemainingInPage -= bytesToEndOfPacketOrPage; |
| 7171 | |
| 7172 | if (atEndOfPage) { |
| 7173 | /* |
| 7174 | We're potentially at the next packet, but we need to check the next page first to be sure because the packet may |
| 7175 | straddle pages. |
| 7176 | */ |
| 7177 | if (!drflac_oggbs__goto_next_page(oggbs)) { |
| 7178 | return DRFLAC_FALSE; |
| 7179 | } |
| 7180 | |
| 7181 | /* If it's a fresh packet it most likely means we're at the next packet. */ |
| 7182 | if ((oggbs->currentPageHeader.headerType & 0x01) == 0) { |
| 7183 | return DRFLAC_TRUE; |
| 7184 | } |
| 7185 | } else { |
| 7186 | /* We're at the next packet. */ |
| 7187 | return DRFLAC_TRUE; |
| 7188 | } |
| 7189 | } |
| 7190 | } |
| 7191 | |
| 7192 | static drflac_bool32 drflac_oggbs__seek_to_next_frame(drflac_oggbs* oggbs) |
| 7193 | { |
| 7194 | /* The bitstream should be sitting on the first byte just after the header of the frame. */ |
| 7195 | |
| 7196 | /* What we're actually doing here is seeking to the start of the next packet. */ |
| 7197 | return drflac_oggbs__seek_to_next_packet(oggbs); |
| 7198 | } |
| 7199 | #endif |
| 7200 | |
| 7201 | static size_t drflac__on_read_ogg(void* pUserData, void* bufferOut, size_t bytesToRead) |
| 7202 | { |
| 7203 | drflac_oggbs* oggbs = (drflac_oggbs*)pUserData; |
| 7204 | drflac_uint8* pRunningBufferOut = (drflac_uint8*)bufferOut; |
| 7205 | size_t bytesRead = 0; |
| 7206 | |
| 7207 | DRFLAC_ASSERT(oggbs != NULL); |
| 7208 | DRFLAC_ASSERT(pRunningBufferOut != NULL); |
| 7209 | |
| 7210 | /* Reading is done page-by-page. If we've run out of bytes in the page we need to move to the next one. */ |
| 7211 | while (bytesRead < bytesToRead) { |
| 7212 | size_t bytesRemainingToRead = bytesToRead - bytesRead; |
| 7213 | |
| 7214 | if (oggbs->bytesRemainingInPage >= bytesRemainingToRead) { |
| 7215 | DRFLAC_COPY_MEMORY(pRunningBufferOut, oggbs->pageData + (oggbs->pageDataSize - oggbs->bytesRemainingInPage), bytesRemainingToRead); |
| 7216 | bytesRead += bytesRemainingToRead; |
| 7217 | oggbs->bytesRemainingInPage -= (drflac_uint32)bytesRemainingToRead; |
| 7218 | break; |
| 7219 | } |
| 7220 | |
| 7221 | /* If we get here it means some of the requested data is contained in the next pages. */ |
| 7222 | if (oggbs->bytesRemainingInPage > 0) { |
| 7223 | DRFLAC_COPY_MEMORY(pRunningBufferOut, oggbs->pageData + (oggbs->pageDataSize - oggbs->bytesRemainingInPage), oggbs->bytesRemainingInPage); |
| 7224 | bytesRead += oggbs->bytesRemainingInPage; |
| 7225 | pRunningBufferOut += oggbs->bytesRemainingInPage; |
| 7226 | oggbs->bytesRemainingInPage = 0; |
| 7227 | } |
| 7228 | |
| 7229 | DRFLAC_ASSERT(bytesRemainingToRead > 0); |
| 7230 | if (!drflac_oggbs__goto_next_page(oggbs, drflac_ogg_recover_on_crc_mismatch)) { |
| 7231 | break; /* Failed to go to the next page. Might have simply hit the end of the stream. */ |
| 7232 | } |
| 7233 | } |
| 7234 | |
| 7235 | return bytesRead; |
| 7236 | } |
| 7237 | |
| 7238 | static drflac_bool32 drflac__on_seek_ogg(void* pUserData, int offset, drflac_seek_origin origin) |
| 7239 | { |
| 7240 | drflac_oggbs* oggbs = (drflac_oggbs*)pUserData; |
| 7241 | int bytesSeeked = 0; |
| 7242 | |
| 7243 | DRFLAC_ASSERT(oggbs != NULL); |
| 7244 | DRFLAC_ASSERT(offset >= 0); /* <-- Never seek backwards. */ |
| 7245 | |
| 7246 | /* Seeking is always forward which makes things a lot simpler. */ |
| 7247 | if (origin == drflac_seek_origin_start) { |
| 7248 | if (!drflac_oggbs__seek_physical(oggbs, (int)oggbs->firstBytePos, drflac_seek_origin_start)) { |
| 7249 | return DRFLAC_FALSE; |
| 7250 | } |
| 7251 | |
| 7252 | if (!drflac_oggbs__goto_next_page(oggbs, drflac_ogg_fail_on_crc_mismatch)) { |
| 7253 | return DRFLAC_FALSE; |
| 7254 | } |
| 7255 | |
| 7256 | return drflac__on_seek_ogg(pUserData, offset, drflac_seek_origin_current); |
| 7257 | } |
| 7258 | |
| 7259 | DRFLAC_ASSERT(origin == drflac_seek_origin_current); |
| 7260 | |
| 7261 | while (bytesSeeked < offset) { |
| 7262 | int bytesRemainingToSeek = offset - bytesSeeked; |
| 7263 | DRFLAC_ASSERT(bytesRemainingToSeek >= 0); |
| 7264 | |
| 7265 | if (oggbs->bytesRemainingInPage >= (size_t)bytesRemainingToSeek) { |
| 7266 | bytesSeeked += bytesRemainingToSeek; |
| 7267 | (void)bytesSeeked; /* <-- Silence a dead store warning emitted by Clang Static Analyzer. */ |
| 7268 | oggbs->bytesRemainingInPage -= bytesRemainingToSeek; |
| 7269 | break; |
| 7270 | } |
| 7271 | |
| 7272 | /* If we get here it means some of the requested data is contained in the next pages. */ |
| 7273 | if (oggbs->bytesRemainingInPage > 0) { |
| 7274 | bytesSeeked += (int)oggbs->bytesRemainingInPage; |
| 7275 | oggbs->bytesRemainingInPage = 0; |
| 7276 | } |
| 7277 | |
| 7278 | DRFLAC_ASSERT(bytesRemainingToSeek > 0); |
| 7279 | if (!drflac_oggbs__goto_next_page(oggbs, drflac_ogg_fail_on_crc_mismatch)) { |
| 7280 | /* Failed to go to the next page. We either hit the end of the stream or had a CRC mismatch. */ |
| 7281 | return DRFLAC_FALSE; |
| 7282 | } |
| 7283 | } |
| 7284 | |
| 7285 | return DRFLAC_TRUE; |
| 7286 | } |
| 7287 | |
| 7288 | |
| 7289 | static drflac_bool32 drflac_ogg__seek_to_pcm_frame(drflac* pFlac, drflac_uint64 pcmFrameIndex) |
| 7290 | { |
| 7291 | drflac_oggbs* oggbs = (drflac_oggbs*)pFlac->_oggbs; |
| 7292 | drflac_uint64 originalBytePos; |
| 7293 | drflac_uint64 runningGranulePosition; |
| 7294 | drflac_uint64 runningFrameBytePos; |
| 7295 | drflac_uint64 runningPCMFrameCount; |
| 7296 | |
| 7297 | DRFLAC_ASSERT(oggbs != NULL); |
| 7298 | |
| 7299 | originalBytePos = oggbs->currentBytePos; /* For recovery. Points to the OggS identifier. */ |
| 7300 | |
| 7301 | /* First seek to the first frame. */ |
| 7302 | if (!drflac__seek_to_byte(&pFlac->bs, pFlac->firstFLACFramePosInBytes)) { |
| 7303 | return DRFLAC_FALSE; |
| 7304 | } |
| 7305 | oggbs->bytesRemainingInPage = 0; |
| 7306 | |
| 7307 | runningGranulePosition = 0; |
| 7308 | for (;;) { |
| 7309 | if (!drflac_oggbs__goto_next_page(oggbs, drflac_ogg_recover_on_crc_mismatch)) { |
| 7310 | drflac_oggbs__seek_physical(oggbs, originalBytePos, drflac_seek_origin_start); |
| 7311 | return DRFLAC_FALSE; /* Never did find that sample... */ |
| 7312 | } |
| 7313 | |
| 7314 | runningFrameBytePos = oggbs->currentBytePos - drflac_ogg__get_page_header_size(&oggbs->currentPageHeader) - oggbs->pageDataSize; |
| 7315 | if (oggbs->currentPageHeader.granulePosition >= pcmFrameIndex) { |
| 7316 | break; /* The sample is somewhere in the previous page. */ |
| 7317 | } |
| 7318 | |
| 7319 | /* |
| 7320 | At this point we know the sample is not in the previous page. It could possibly be in this page. For simplicity we |
| 7321 | disregard any pages that do not begin a fresh packet. |
| 7322 | */ |
| 7323 | if ((oggbs->currentPageHeader.headerType & 0x01) == 0) { /* <-- Is it a fresh page? */ |
| 7324 | if (oggbs->currentPageHeader.segmentTable[0] >= 2) { |
| 7325 | drflac_uint8 firstBytesInPage[2]; |
| 7326 | firstBytesInPage[0] = oggbs->pageData[0]; |
| 7327 | firstBytesInPage[1] = oggbs->pageData[1]; |
| 7328 | |
| 7329 | if ((firstBytesInPage[0] == 0xFF) && (firstBytesInPage[1] & 0xFC) == 0xF8) { /* <-- Does the page begin with a frame's sync code? */ |
| 7330 | runningGranulePosition = oggbs->currentPageHeader.granulePosition; |
| 7331 | } |
| 7332 | |
| 7333 | continue; |
| 7334 | } |
| 7335 | } |
| 7336 | } |
| 7337 | |
| 7338 | /* |
| 7339 | We found the page that that is closest to the sample, so now we need to find it. The first thing to do is seek to the |
| 7340 | start of that page. In the loop above we checked that it was a fresh page which means this page is also the start of |
| 7341 | a new frame. This property means that after we've seeked to the page we can immediately start looping over frames until |
| 7342 | we find the one containing the target sample. |
| 7343 | */ |
| 7344 | if (!drflac_oggbs__seek_physical(oggbs, runningFrameBytePos, drflac_seek_origin_start)) { |
| 7345 | return DRFLAC_FALSE; |
| 7346 | } |
| 7347 | if (!drflac_oggbs__goto_next_page(oggbs, drflac_ogg_recover_on_crc_mismatch)) { |
| 7348 | return DRFLAC_FALSE; |
| 7349 | } |
| 7350 | |
| 7351 | /* |
| 7352 | At this point we'll be sitting on the first byte of the frame header of the first frame in the page. We just keep |
| 7353 | looping over these frames until we find the one containing the sample we're after. |
| 7354 | */ |
| 7355 | runningPCMFrameCount = runningGranulePosition; |
| 7356 | for (;;) { |
| 7357 | /* |
| 7358 | There are two ways to find the sample and seek past irrelevant frames: |
| 7359 | 1) Use the native FLAC decoder. |
| 7360 | 2) Use Ogg's framing system. |
| 7361 | |
| 7362 | Both of these options have their own pros and cons. Using the native FLAC decoder is slower because it needs to |
| 7363 | do a full decode of the frame. Using Ogg's framing system is faster, but more complicated and involves some code |
| 7364 | duplication for the decoding of frame headers. |
| 7365 | |
| 7366 | Another thing to consider is that using the Ogg framing system will perform direct seeking of the physical Ogg |
| 7367 | bitstream. This is important to consider because it means we cannot read data from the drflac_bs object using the |
| 7368 | standard drflac__*() APIs because that will read in extra data for its own internal caching which in turn breaks |
| 7369 | the positioning of the read pointer of the physical Ogg bitstream. Therefore, anything that would normally be read |
| 7370 | using the native FLAC decoding APIs, such as drflac__read_next_flac_frame_header(), need to be re-implemented so as to |
| 7371 | avoid the use of the drflac_bs object. |
| 7372 | |
| 7373 | Considering these issues, I have decided to use the slower native FLAC decoding method for the following reasons: |
| 7374 | 1) Seeking is already partially accelerated using Ogg's paging system in the code block above. |
| 7375 | 2) Seeking in an Ogg encapsulated FLAC stream is probably quite uncommon. |
| 7376 | 3) Simplicity. |
| 7377 | */ |
| 7378 | drflac_uint64 firstPCMFrameInFLACFrame = 0; |
| 7379 | drflac_uint64 lastPCMFrameInFLACFrame = 0; |
| 7380 | drflac_uint64 pcmFrameCountInThisFrame; |
| 7381 | |
| 7382 | if (!drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFLACFrame.header)) { |
| 7383 | return DRFLAC_FALSE; |
| 7384 | } |
| 7385 | |
| 7386 | drflac__get_pcm_frame_range_of_current_flac_frame(pFlac, &firstPCMFrameInFLACFrame, &lastPCMFrameInFLACFrame); |
| 7387 | |
| 7388 | pcmFrameCountInThisFrame = (lastPCMFrameInFLACFrame - firstPCMFrameInFLACFrame) + 1; |
| 7389 | |
| 7390 | /* If we are seeking to the end of the file and we've just hit it, we're done. */ |
| 7391 | if (pcmFrameIndex == pFlac->totalPCMFrameCount && (runningPCMFrameCount + pcmFrameCountInThisFrame) == pFlac->totalPCMFrameCount) { |
| 7392 | drflac_result result = drflac__decode_flac_frame(pFlac); |
| 7393 | if (result == DRFLAC_SUCCESS) { |
| 7394 | pFlac->currentPCMFrame = pcmFrameIndex; |
| 7395 | pFlac->currentFLACFrame.pcmFramesRemaining = 0; |
| 7396 | return DRFLAC_TRUE; |
| 7397 | } else { |
| 7398 | return DRFLAC_FALSE; |
| 7399 | } |
| 7400 | } |
| 7401 | |
| 7402 | if (pcmFrameIndex < (runningPCMFrameCount + pcmFrameCountInThisFrame)) { |
| 7403 | /* |
| 7404 | The sample should be in this FLAC frame. We need to fully decode it, however if it's an invalid frame (a CRC mismatch), we need to pretend |
| 7405 | it never existed and keep iterating. |
| 7406 | */ |
| 7407 | drflac_result result = drflac__decode_flac_frame(pFlac); |
| 7408 | if (result == DRFLAC_SUCCESS) { |
| 7409 | /* The frame is valid. We just need to skip over some samples to ensure it's sample-exact. */ |
| 7410 | drflac_uint64 pcmFramesToDecode = (size_t)(pcmFrameIndex - runningPCMFrameCount); /* <-- Safe cast because the maximum number of samples in a frame is 65535. */ |
| 7411 | if (pcmFramesToDecode == 0) { |
| 7412 | return DRFLAC_TRUE; |
| 7413 | } |
| 7414 | |
| 7415 | pFlac->currentPCMFrame = runningPCMFrameCount; |
| 7416 | |
| 7417 | return drflac__seek_forward_by_pcm_frames(pFlac, pcmFramesToDecode) == pcmFramesToDecode; /* <-- If this fails, something bad has happened (it should never fail). */ |
| 7418 | } else { |
| 7419 | if (result == DRFLAC_CRC_MISMATCH) { |
| 7420 | continue; /* CRC mismatch. Pretend this frame never existed. */ |
| 7421 | } else { |
| 7422 | return DRFLAC_FALSE; |
| 7423 | } |
| 7424 | } |
| 7425 | } else { |
| 7426 | /* |
| 7427 | It's not in this frame. We need to seek past the frame, but check if there was a CRC mismatch. If so, we pretend this |
| 7428 | frame never existed and leave the running sample count untouched. |
| 7429 | */ |
| 7430 | drflac_result result = drflac__seek_to_next_flac_frame(pFlac); |
| 7431 | if (result == DRFLAC_SUCCESS) { |
| 7432 | runningPCMFrameCount += pcmFrameCountInThisFrame; |
| 7433 | } else { |
| 7434 | if (result == DRFLAC_CRC_MISMATCH) { |
| 7435 | continue; /* CRC mismatch. Pretend this frame never existed. */ |
| 7436 | } else { |
| 7437 | return DRFLAC_FALSE; |
| 7438 | } |
| 7439 | } |
| 7440 | } |
| 7441 | } |
| 7442 | } |
| 7443 | |
| 7444 | |
| 7445 | |
| 7446 | static drflac_bool32 drflac__init_private__ogg(drflac_init_info* pInit, drflac_read_proc onRead, drflac_seek_proc onSeek, drflac_meta_proc onMeta, void* pUserData, void* pUserDataMD, drflac_bool32 relaxed) |
| 7447 | { |
| 7448 | drflac_ogg_page_header header; |
| 7449 | drflac_uint32 crc32 = DRFLAC_OGG_CAPTURE_PATTERN_CRC32; |
| 7450 | drflac_uint32 bytesRead = 0; |
| 7451 | |
| 7452 | /* Pre Condition: The bit stream should be sitting just past the 4-byte OggS capture pattern. */ |
| 7453 | (void)relaxed; |
| 7454 | |
| 7455 | pInit->container = drflac_container_ogg; |
| 7456 | pInit->oggFirstBytePos = 0; |
| 7457 | |
| 7458 | /* |
| 7459 | We'll get here if the first 4 bytes of the stream were the OggS capture pattern, however it doesn't necessarily mean the |
| 7460 | stream includes FLAC encoded audio. To check for this we need to scan the beginning-of-stream page markers and check if |
| 7461 | any match the FLAC specification. Important to keep in mind that the stream may be multiplexed. |
| 7462 | */ |
| 7463 | if (drflac_ogg__read_page_header_after_capture_pattern(onRead, pUserData, &header, &bytesRead, &crc32) != DRFLAC_SUCCESS) { |
| 7464 | return DRFLAC_FALSE; |
| 7465 | } |
| 7466 | pInit->runningFilePos += bytesRead; |
| 7467 | |
| 7468 | for (;;) { |
| 7469 | int pageBodySize; |
| 7470 | |
| 7471 | /* Break if we're past the beginning of stream page. */ |
| 7472 | if ((header.headerType & 0x02) == 0) { |
| 7473 | return DRFLAC_FALSE; |
| 7474 | } |
| 7475 | |
| 7476 | /* Check if it's a FLAC header. */ |
| 7477 | pageBodySize = drflac_ogg__get_page_body_size(&header); |
| 7478 | if (pageBodySize == 51) { /* 51 = the lacing value of the FLAC header packet. */ |
| 7479 | /* It could be a FLAC page... */ |
| 7480 | drflac_uint32 bytesRemainingInPage = pageBodySize; |
| 7481 | drflac_uint8 packetType; |
| 7482 | |
| 7483 | if (onRead(pUserData, &packetType, 1) != 1) { |
| 7484 | return DRFLAC_FALSE; |
| 7485 | } |
| 7486 | |
| 7487 | bytesRemainingInPage -= 1; |
| 7488 | if (packetType == 0x7F) { |
| 7489 | /* Increasingly more likely to be a FLAC page... */ |
| 7490 | drflac_uint8 sig[4]; |
| 7491 | if (onRead(pUserData, sig, 4) != 4) { |
| 7492 | return DRFLAC_FALSE; |
| 7493 | } |
| 7494 | |
| 7495 | bytesRemainingInPage -= 4; |
| 7496 | if (sig[0] == 'F' && sig[1] == 'L' && sig[2] == 'A' && sig[3] == 'C') { |
| 7497 | /* Almost certainly a FLAC page... */ |
| 7498 | drflac_uint8 mappingVersion[2]; |
| 7499 | if (onRead(pUserData, mappingVersion, 2) != 2) { |
| 7500 | return DRFLAC_FALSE; |
| 7501 | } |
| 7502 | |
| 7503 | if (mappingVersion[0] != 1) { |
| 7504 | return DRFLAC_FALSE; /* Only supporting version 1.x of the Ogg mapping. */ |
| 7505 | } |
| 7506 | |
| 7507 | /* |
| 7508 | The next 2 bytes are the non-audio packets, not including this one. We don't care about this because we're going to |
| 7509 | be handling it in a generic way based on the serial number and packet types. |
| 7510 | */ |
| 7511 | if (!onSeek(pUserData, 2, drflac_seek_origin_current)) { |
| 7512 | return DRFLAC_FALSE; |
| 7513 | } |
| 7514 | |
| 7515 | /* Expecting the native FLAC signature "fLaC". */ |
| 7516 | if (onRead(pUserData, sig, 4) != 4) { |
| 7517 | return DRFLAC_FALSE; |
| 7518 | } |
| 7519 | |
| 7520 | if (sig[0] == 'f' && sig[1] == 'L' && sig[2] == 'a' && sig[3] == 'C') { |
| 7521 | /* The remaining data in the page should be the STREAMINFO block. */ |
| 7522 | drflac_streaminfo streaminfo; |
| 7523 | drflac_uint8 isLastBlock; |
| 7524 | drflac_uint8 blockType; |
| 7525 | drflac_uint32 blockSize; |
| 7526 | if (!drflac__read_and_decode_block_header(onRead, pUserData, &isLastBlock, &blockType, &blockSize)) { |
| 7527 | return DRFLAC_FALSE; |
| 7528 | } |
| 7529 | |
| 7530 | if (blockType != DRFLAC_METADATA_BLOCK_TYPE_STREAMINFO || blockSize != 34) { |
| 7531 | return DRFLAC_FALSE; /* Invalid block type. First block must be the STREAMINFO block. */ |
| 7532 | } |
| 7533 | |
| 7534 | if (drflac__read_streaminfo(onRead, pUserData, &streaminfo)) { |
| 7535 | /* Success! */ |
| 7536 | pInit->hasStreamInfoBlock = DRFLAC_TRUE; |
| 7537 | pInit->sampleRate = streaminfo.sampleRate; |
| 7538 | pInit->channels = streaminfo.channels; |
| 7539 | pInit->bitsPerSample = streaminfo.bitsPerSample; |
| 7540 | pInit->totalPCMFrameCount = streaminfo.totalPCMFrameCount; |
| 7541 | pInit->maxBlockSizeInPCMFrames = streaminfo.maxBlockSizeInPCMFrames; |
| 7542 | pInit->hasMetadataBlocks = !isLastBlock; |
| 7543 | |
| 7544 | if (onMeta) { |
| 7545 | drflac_metadata metadata; |
| 7546 | metadata.type = DRFLAC_METADATA_BLOCK_TYPE_STREAMINFO; |
| 7547 | metadata.pRawData = NULL; |
| 7548 | metadata.rawDataSize = 0; |
| 7549 | metadata.data.streaminfo = streaminfo; |
| 7550 | onMeta(pUserDataMD, &metadata); |
| 7551 | } |
| 7552 | |
| 7553 | pInit->runningFilePos += pageBodySize; |
| 7554 | pInit->oggFirstBytePos = pInit->runningFilePos - 79; /* Subtracting 79 will place us right on top of the "OggS" identifier of the FLAC bos page. */ |
| 7555 | pInit->oggSerial = header.serialNumber; |
| 7556 | pInit->oggBosHeader = header; |
| 7557 | break; |
| 7558 | } else { |
| 7559 | /* Failed to read STREAMINFO block. Aww, so close... */ |
| 7560 | return DRFLAC_FALSE; |
| 7561 | } |
| 7562 | } else { |
| 7563 | /* Invalid file. */ |
| 7564 | return DRFLAC_FALSE; |
| 7565 | } |
| 7566 | } else { |
| 7567 | /* Not a FLAC header. Skip it. */ |
| 7568 | if (!onSeek(pUserData, bytesRemainingInPage, drflac_seek_origin_current)) { |
| 7569 | return DRFLAC_FALSE; |
| 7570 | } |
| 7571 | } |
| 7572 | } else { |
| 7573 | /* Not a FLAC header. Seek past the entire page and move on to the next. */ |
| 7574 | if (!onSeek(pUserData, bytesRemainingInPage, drflac_seek_origin_current)) { |
| 7575 | return DRFLAC_FALSE; |
| 7576 | } |
| 7577 | } |
| 7578 | } else { |
| 7579 | if (!onSeek(pUserData, pageBodySize, drflac_seek_origin_current)) { |
| 7580 | return DRFLAC_FALSE; |
| 7581 | } |
| 7582 | } |
| 7583 | |
| 7584 | pInit->runningFilePos += pageBodySize; |
| 7585 | |
| 7586 | |
| 7587 | /* Read the header of the next page. */ |
| 7588 | if (drflac_ogg__read_page_header(onRead, pUserData, &header, &bytesRead, &crc32) != DRFLAC_SUCCESS) { |
| 7589 | return DRFLAC_FALSE; |
| 7590 | } |
| 7591 | pInit->runningFilePos += bytesRead; |
| 7592 | } |
| 7593 | |
| 7594 | /* |
| 7595 | If we get here it means we found a FLAC audio stream. We should be sitting on the first byte of the header of the next page. The next |
| 7596 | packets in the FLAC logical stream contain the metadata. The only thing left to do in the initialization phase for Ogg is to create the |
| 7597 | Ogg bistream object. |
| 7598 | */ |
| 7599 | pInit->hasMetadataBlocks = DRFLAC_TRUE; /* <-- Always have at least VORBIS_COMMENT metadata block. */ |
| 7600 | return DRFLAC_TRUE; |
| 7601 | } |
| 7602 | #endif |
| 7603 | |
| 7604 | static drflac_bool32 drflac__init_private(drflac_init_info* pInit, drflac_read_proc onRead, drflac_seek_proc onSeek, drflac_meta_proc onMeta, drflac_container container, void* pUserData, void* pUserDataMD) |
| 7605 | { |
| 7606 | drflac_bool32 relaxed; |
| 7607 | drflac_uint8 id[4]; |
| 7608 | |
| 7609 | if (pInit == NULL || onRead == NULL || onSeek == NULL) { |
| 7610 | return DRFLAC_FALSE; |
| 7611 | } |
| 7612 | |
| 7613 | DRFLAC_ZERO_MEMORY(pInit, sizeof(*pInit)); |
| 7614 | pInit->onRead = onRead; |
| 7615 | pInit->onSeek = onSeek; |
| 7616 | pInit->onMeta = onMeta; |
| 7617 | pInit->container = container; |
| 7618 | pInit->pUserData = pUserData; |
| 7619 | pInit->pUserDataMD = pUserDataMD; |
| 7620 | |
| 7621 | pInit->bs.onRead = onRead; |
| 7622 | pInit->bs.onSeek = onSeek; |
| 7623 | pInit->bs.pUserData = pUserData; |
| 7624 | drflac__reset_cache(&pInit->bs); |
| 7625 | |
| 7626 | |
| 7627 | /* If the container is explicitly defined then we can try opening in relaxed mode. */ |
| 7628 | relaxed = container != drflac_container_unknown; |
| 7629 | |
| 7630 | /* Skip over any ID3 tags. */ |
| 7631 | for (;;) { |
| 7632 | if (onRead(pUserData, id, 4) != 4) { |
| 7633 | return DRFLAC_FALSE; /* Ran out of data. */ |
| 7634 | } |
| 7635 | pInit->runningFilePos += 4; |
| 7636 | |
| 7637 | if (id[0] == 'I' && id[1] == 'D' && id[2] == '3') { |
| 7638 | drflac_uint8 header[6]; |
| 7639 | drflac_uint8 flags; |
| 7640 | drflac_uint32 headerSize; |
| 7641 | |
| 7642 | if (onRead(pUserData, header, 6) != 6) { |
| 7643 | return DRFLAC_FALSE; /* Ran out of data. */ |
| 7644 | } |
| 7645 | pInit->runningFilePos += 6; |
| 7646 | |
| 7647 | flags = header[1]; |
| 7648 | |
| 7649 | DRFLAC_COPY_MEMORY(&headerSize, header+2, 4); |
| 7650 | headerSize = drflac__unsynchsafe_32(drflac__be2host_32(headerSize)); |
| 7651 | if (flags & 0x10) { |
| 7652 | headerSize += 10; |
| 7653 | } |
| 7654 | |
| 7655 | if (!onSeek(pUserData, headerSize, drflac_seek_origin_current)) { |
| 7656 | return DRFLAC_FALSE; /* Failed to seek past the tag. */ |
| 7657 | } |
| 7658 | pInit->runningFilePos += headerSize; |
| 7659 | } else { |
| 7660 | break; |
| 7661 | } |
| 7662 | } |
| 7663 | |
| 7664 | if (id[0] == 'f' && id[1] == 'L' && id[2] == 'a' && id[3] == 'C') { |
| 7665 | return drflac__init_private__native(pInit, onRead, onSeek, onMeta, pUserData, pUserDataMD, relaxed); |
| 7666 | } |
| 7667 | #ifndef DR_FLAC_NO_OGG |
| 7668 | if (id[0] == 'O' && id[1] == 'g' && id[2] == 'g' && id[3] == 'S') { |
| 7669 | return drflac__init_private__ogg(pInit, onRead, onSeek, onMeta, pUserData, pUserDataMD, relaxed); |
| 7670 | } |
| 7671 | #endif |
| 7672 | |
| 7673 | /* If we get here it means we likely don't have a header. Try opening in relaxed mode, if applicable. */ |
| 7674 | if (relaxed) { |
| 7675 | if (container == drflac_container_native) { |
| 7676 | return drflac__init_private__native(pInit, onRead, onSeek, onMeta, pUserData, pUserDataMD, relaxed); |
| 7677 | } |
| 7678 | #ifndef DR_FLAC_NO_OGG |
| 7679 | if (container == drflac_container_ogg) { |
| 7680 | return drflac__init_private__ogg(pInit, onRead, onSeek, onMeta, pUserData, pUserDataMD, relaxed); |
| 7681 | } |
| 7682 | #endif |
| 7683 | } |
| 7684 | |
| 7685 | /* Unsupported container. */ |
| 7686 | return DRFLAC_FALSE; |
| 7687 | } |
| 7688 | |
| 7689 | static void drflac__init_from_info(drflac* pFlac, const drflac_init_info* pInit) |
| 7690 | { |
| 7691 | DRFLAC_ASSERT(pFlac != NULL); |
| 7692 | DRFLAC_ASSERT(pInit != NULL); |
| 7693 | |
| 7694 | DRFLAC_ZERO_MEMORY(pFlac, sizeof(*pFlac)); |
| 7695 | pFlac->bs = pInit->bs; |
| 7696 | pFlac->onMeta = pInit->onMeta; |
| 7697 | pFlac->pUserDataMD = pInit->pUserDataMD; |
| 7698 | pFlac->maxBlockSizeInPCMFrames = pInit->maxBlockSizeInPCMFrames; |
| 7699 | pFlac->sampleRate = pInit->sampleRate; |
| 7700 | pFlac->channels = (drflac_uint8)pInit->channels; |
| 7701 | pFlac->bitsPerSample = (drflac_uint8)pInit->bitsPerSample; |
| 7702 | pFlac->totalPCMFrameCount = pInit->totalPCMFrameCount; |
| 7703 | pFlac->container = pInit->container; |
| 7704 | } |
| 7705 | |
| 7706 | |
| 7707 | static drflac* drflac_open_with_metadata_private(drflac_read_proc onRead, drflac_seek_proc onSeek, drflac_meta_proc onMeta, drflac_container container, void* pUserData, void* pUserDataMD, const drflac_allocation_callbacks* pAllocationCallbacks) |
| 7708 | { |
| 7709 | drflac_init_info init; |
| 7710 | drflac_uint32 allocationSize; |
| 7711 | drflac_uint32 wholeSIMDVectorCountPerChannel; |
| 7712 | drflac_uint32 decodedSamplesAllocationSize; |
| 7713 | #ifndef DR_FLAC_NO_OGG |
| 7714 | drflac_oggbs oggbs; |
| 7715 | #endif |
| 7716 | drflac_uint64 firstFramePos; |
| 7717 | drflac_uint64 seektablePos; |
| 7718 | drflac_uint32 seektableSize; |
| 7719 | drflac_allocation_callbacks allocationCallbacks; |
| 7720 | drflac* pFlac; |
| 7721 | |
| 7722 | /* CPU support first. */ |
| 7723 | drflac__init_cpu_caps(); |
| 7724 | |
| 7725 | if (!drflac__init_private(&init, onRead, onSeek, onMeta, container, pUserData, pUserDataMD)) { |
| 7726 | return NULL; |
| 7727 | } |
| 7728 | |
| 7729 | if (pAllocationCallbacks != NULL) { |
| 7730 | allocationCallbacks = *pAllocationCallbacks; |
| 7731 | if (allocationCallbacks.onFree == NULL || (allocationCallbacks.onMalloc == NULL && allocationCallbacks.onRealloc == NULL)) { |
| 7732 | return NULL; /* Invalid allocation callbacks. */ |
| 7733 | } |
| 7734 | } else { |
| 7735 | allocationCallbacks.pUserData = NULL; |
| 7736 | allocationCallbacks.onMalloc = drflac__malloc_default; |
| 7737 | allocationCallbacks.onRealloc = drflac__realloc_default; |
| 7738 | allocationCallbacks.onFree = drflac__free_default; |
| 7739 | } |
| 7740 | |
| 7741 | |
| 7742 | /* |
| 7743 | The size of the allocation for the drflac object needs to be large enough to fit the following: |
| 7744 | 1) The main members of the drflac structure |
| 7745 | 2) A block of memory large enough to store the decoded samples of the largest frame in the stream |
| 7746 | 3) If the container is Ogg, a drflac_oggbs object |
| 7747 | |
| 7748 | The complicated part of the allocation is making sure there's enough room the decoded samples, taking into consideration |
| 7749 | the different SIMD instruction sets. |
| 7750 | */ |
| 7751 | allocationSize = sizeof(drflac); |
| 7752 | |
| 7753 | /* |
| 7754 | The allocation size for decoded frames depends on the number of 32-bit integers that fit inside the largest SIMD vector |
| 7755 | we are supporting. |
| 7756 | */ |
| 7757 | if ((init.maxBlockSizeInPCMFrames % (DRFLAC_MAX_SIMD_VECTOR_SIZE / sizeof(drflac_int32))) == 0) { |
| 7758 | wholeSIMDVectorCountPerChannel = (init.maxBlockSizeInPCMFrames / (DRFLAC_MAX_SIMD_VECTOR_SIZE / sizeof(drflac_int32))); |
| 7759 | } else { |
| 7760 | wholeSIMDVectorCountPerChannel = (init.maxBlockSizeInPCMFrames / (DRFLAC_MAX_SIMD_VECTOR_SIZE / sizeof(drflac_int32))) + 1; |
| 7761 | } |
| 7762 | |
| 7763 | decodedSamplesAllocationSize = wholeSIMDVectorCountPerChannel * DRFLAC_MAX_SIMD_VECTOR_SIZE * init.channels; |
| 7764 | |
| 7765 | allocationSize += decodedSamplesAllocationSize; |
| 7766 | allocationSize += DRFLAC_MAX_SIMD_VECTOR_SIZE; /* Allocate extra bytes to ensure we have enough for alignment. */ |
| 7767 | |
| 7768 | #ifndef DR_FLAC_NO_OGG |
| 7769 | /* There's additional data required for Ogg streams. */ |
| 7770 | if (init.container == drflac_container_ogg) { |
| 7771 | allocationSize += sizeof(drflac_oggbs); |
| 7772 | } |
| 7773 | |
| 7774 | DRFLAC_ZERO_MEMORY(&oggbs, sizeof(oggbs)); |
| 7775 | if (init.container == drflac_container_ogg) { |
| 7776 | oggbs.onRead = onRead; |
| 7777 | oggbs.onSeek = onSeek; |
| 7778 | oggbs.pUserData = pUserData; |
| 7779 | oggbs.currentBytePos = init.oggFirstBytePos; |
| 7780 | oggbs.firstBytePos = init.oggFirstBytePos; |
| 7781 | oggbs.serialNumber = init.oggSerial; |
| 7782 | oggbs.bosPageHeader = init.oggBosHeader; |
| 7783 | oggbs.bytesRemainingInPage = 0; |
| 7784 | } |
| 7785 | #endif |
| 7786 | |
| 7787 | /* |
| 7788 | This part is a bit awkward. We need to load the seektable so that it can be referenced in-memory, but I want the drflac object to |
| 7789 | consist of only a single heap allocation. To this, the size of the seek table needs to be known, which we determine when reading |
| 7790 | and decoding the metadata. |
| 7791 | */ |
| 7792 | firstFramePos = 42; /* <-- We know we are at byte 42 at this point. */ |
| 7793 | seektablePos = 0; |
| 7794 | seektableSize = 0; |
| 7795 | if (init.hasMetadataBlocks) { |
| 7796 | drflac_read_proc onReadOverride = onRead; |
| 7797 | drflac_seek_proc onSeekOverride = onSeek; |
| 7798 | void* pUserDataOverride = pUserData; |
| 7799 | |
| 7800 | #ifndef DR_FLAC_NO_OGG |
| 7801 | if (init.container == drflac_container_ogg) { |
| 7802 | onReadOverride = drflac__on_read_ogg; |
| 7803 | onSeekOverride = drflac__on_seek_ogg; |
| 7804 | pUserDataOverride = (void*)&oggbs; |
| 7805 | } |
| 7806 | #endif |
| 7807 | |
| 7808 | if (!drflac__read_and_decode_metadata(onReadOverride, onSeekOverride, onMeta, pUserDataOverride, pUserDataMD, &firstFramePos, &seektablePos, &seektableSize, &allocationCallbacks)) { |
| 7809 | return NULL; |
| 7810 | } |
| 7811 | |
| 7812 | allocationSize += seektableSize; |
| 7813 | } |
| 7814 | |
| 7815 | |
| 7816 | pFlac = (drflac*)drflac__malloc_from_callbacks(allocationSize, &allocationCallbacks); |
| 7817 | if (pFlac == NULL) { |
| 7818 | return NULL; |
| 7819 | } |
| 7820 | |
| 7821 | drflac__init_from_info(pFlac, &init); |
| 7822 | pFlac->allocationCallbacks = allocationCallbacks; |
| 7823 | pFlac->pDecodedSamples = (drflac_int32*)drflac_align((size_t)pFlac->pExtraData, DRFLAC_MAX_SIMD_VECTOR_SIZE); |
| 7824 | |
| 7825 | #ifndef DR_FLAC_NO_OGG |
| 7826 | if (init.container == drflac_container_ogg) { |
| 7827 | drflac_oggbs* pInternalOggbs = (drflac_oggbs*)((drflac_uint8*)pFlac->pDecodedSamples + decodedSamplesAllocationSize + seektableSize); |
| 7828 | *pInternalOggbs = oggbs; |
| 7829 | |
| 7830 | /* The Ogg bistream needs to be layered on top of the original bitstream. */ |
| 7831 | pFlac->bs.onRead = drflac__on_read_ogg; |
| 7832 | pFlac->bs.onSeek = drflac__on_seek_ogg; |
| 7833 | pFlac->bs.pUserData = (void*)pInternalOggbs; |
| 7834 | pFlac->_oggbs = (void*)pInternalOggbs; |
| 7835 | } |
| 7836 | #endif |
| 7837 | |
| 7838 | pFlac->firstFLACFramePosInBytes = firstFramePos; |
| 7839 | |
| 7840 | /* NOTE: Seektables are not currently compatible with Ogg encapsulation (Ogg has its own accelerated seeking system). I may change this later, so I'm leaving this here for now. */ |
| 7841 | #ifndef DR_FLAC_NO_OGG |
| 7842 | if (init.container == drflac_container_ogg) |
| 7843 | { |
| 7844 | pFlac->pSeekpoints = NULL; |
| 7845 | pFlac->seekpointCount = 0; |
| 7846 | } |
| 7847 | else |
| 7848 | #endif |
| 7849 | { |
| 7850 | /* If we have a seektable we need to load it now, making sure we move back to where we were previously. */ |
| 7851 | if (seektablePos != 0) { |
| 7852 | pFlac->seekpointCount = seektableSize / sizeof(*pFlac->pSeekpoints); |
| 7853 | pFlac->pSeekpoints = (drflac_seekpoint*)((drflac_uint8*)pFlac->pDecodedSamples + decodedSamplesAllocationSize); |
| 7854 | |
| 7855 | DRFLAC_ASSERT(pFlac->bs.onSeek != NULL); |
| 7856 | DRFLAC_ASSERT(pFlac->bs.onRead != NULL); |
| 7857 | |
| 7858 | /* Seek to the seektable, then just read directly into our seektable buffer. */ |
| 7859 | if (pFlac->bs.onSeek(pFlac->bs.pUserData, (int)seektablePos, drflac_seek_origin_start)) { |
| 7860 | if (pFlac->bs.onRead(pFlac->bs.pUserData, pFlac->pSeekpoints, seektableSize) == seektableSize) { |
| 7861 | /* Endian swap. */ |
| 7862 | drflac_uint32 iSeekpoint; |
| 7863 | for (iSeekpoint = 0; iSeekpoint < pFlac->seekpointCount; ++iSeekpoint) { |
| 7864 | pFlac->pSeekpoints[iSeekpoint].firstPCMFrame = drflac__be2host_64(pFlac->pSeekpoints[iSeekpoint].firstPCMFrame); |
| 7865 | pFlac->pSeekpoints[iSeekpoint].flacFrameOffset = drflac__be2host_64(pFlac->pSeekpoints[iSeekpoint].flacFrameOffset); |
| 7866 | pFlac->pSeekpoints[iSeekpoint].pcmFrameCount = drflac__be2host_16(pFlac->pSeekpoints[iSeekpoint].pcmFrameCount); |
| 7867 | } |
| 7868 | } else { |
| 7869 | /* Failed to read the seektable. Pretend we don't have one. */ |
| 7870 | pFlac->pSeekpoints = NULL; |
| 7871 | pFlac->seekpointCount = 0; |
| 7872 | } |
| 7873 | |
| 7874 | /* We need to seek back to where we were. If this fails it's a critical error. */ |
| 7875 | if (!pFlac->bs.onSeek(pFlac->bs.pUserData, (int)pFlac->firstFLACFramePosInBytes, drflac_seek_origin_start)) { |
| 7876 | drflac__free_from_callbacks(pFlac, &allocationCallbacks); |
| 7877 | return NULL; |
| 7878 | } |
| 7879 | } else { |
| 7880 | /* Failed to seek to the seektable. Ominous sign, but for now we can just pretend we don't have one. */ |
| 7881 | pFlac->pSeekpoints = NULL; |
| 7882 | pFlac->seekpointCount = 0; |
| 7883 | } |
| 7884 | } |
| 7885 | } |
| 7886 | |
| 7887 | |
| 7888 | /* |
| 7889 | If we get here, but don't have a STREAMINFO block, it means we've opened the stream in relaxed mode and need to decode |
| 7890 | the first frame. |
| 7891 | */ |
| 7892 | if (!init.hasStreamInfoBlock) { |
| 7893 | pFlac->currentFLACFrame.header = init.firstFrameHeader; |
| 7894 | for (;;) { |
| 7895 | drflac_result result = drflac__decode_flac_frame(pFlac); |
| 7896 | if (result == DRFLAC_SUCCESS) { |
| 7897 | break; |
| 7898 | } else { |
| 7899 | if (result == DRFLAC_CRC_MISMATCH) { |
| 7900 | if (!drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFLACFrame.header)) { |
| 7901 | drflac__free_from_callbacks(pFlac, &allocationCallbacks); |
| 7902 | return NULL; |
| 7903 | } |
| 7904 | continue; |
| 7905 | } else { |
| 7906 | drflac__free_from_callbacks(pFlac, &allocationCallbacks); |
| 7907 | return NULL; |
| 7908 | } |
| 7909 | } |
| 7910 | } |
| 7911 | } |
| 7912 | |
| 7913 | return pFlac; |
| 7914 | } |
| 7915 | |
| 7916 | |
| 7917 | |
| 7918 | #ifndef DR_FLAC_NO_STDIO |
| 7919 | #include <stdio.h> |
| 7920 | #include <wchar.h> /* For wcslen(), wcsrtombs() */ |
| 7921 | |
| 7922 | /* drflac_result_from_errno() is only used for fopen() and wfopen() so putting it inside DR_WAV_NO_STDIO for now. If something else needs this later we can move it out. */ |
| 7923 | #include <errno.h> |
| 7924 | static drflac_result drflac_result_from_errno(int e) |
| 7925 | { |
| 7926 | switch (e) |
| 7927 | { |
| 7928 | case 0: return DRFLAC_SUCCESS; |
| 7929 | #ifdef EPERM |
| 7930 | case EPERM: return DRFLAC_INVALID_OPERATION; |
| 7931 | #endif |
| 7932 | #ifdef ENOENT |
| 7933 | case ENOENT: return DRFLAC_DOES_NOT_EXIST; |
| 7934 | #endif |
| 7935 | #ifdef ESRCH |
| 7936 | case ESRCH: return DRFLAC_DOES_NOT_EXIST; |
| 7937 | #endif |
| 7938 | #ifdef EINTR |
| 7939 | case EINTR: return DRFLAC_INTERRUPT; |
| 7940 | #endif |
| 7941 | #ifdef EIO |
| 7942 | case EIO: return DRFLAC_IO_ERROR; |
| 7943 | #endif |
| 7944 | #ifdef ENXIO |
| 7945 | case ENXIO: return DRFLAC_DOES_NOT_EXIST; |
| 7946 | #endif |
| 7947 | #ifdef E2BIG |
| 7948 | case E2BIG: return DRFLAC_INVALID_ARGS; |
| 7949 | #endif |
| 7950 | #ifdef ENOEXEC |
| 7951 | case ENOEXEC: return DRFLAC_INVALID_FILE; |
| 7952 | #endif |
| 7953 | #ifdef EBADF |
| 7954 | case EBADF: return DRFLAC_INVALID_FILE; |
| 7955 | #endif |
| 7956 | #ifdef ECHILD |
| 7957 | case ECHILD: return DRFLAC_ERROR; |
| 7958 | #endif |
| 7959 | #ifdef EAGAIN |
| 7960 | case EAGAIN: return DRFLAC_UNAVAILABLE; |
| 7961 | #endif |
| 7962 | #ifdef ENOMEM |
| 7963 | case ENOMEM: return DRFLAC_OUT_OF_MEMORY; |
| 7964 | #endif |
| 7965 | #ifdef EACCES |
| 7966 | case EACCES: return DRFLAC_ACCESS_DENIED; |
| 7967 | #endif |
| 7968 | #ifdef EFAULT |
| 7969 | case EFAULT: return DRFLAC_BAD_ADDRESS; |
| 7970 | #endif |
| 7971 | #ifdef ENOTBLK |
| 7972 | case ENOTBLK: return DRFLAC_ERROR; |
| 7973 | #endif |
| 7974 | #ifdef EBUSY |
| 7975 | case EBUSY: return DRFLAC_BUSY; |
| 7976 | #endif |
| 7977 | #ifdef EEXIST |
| 7978 | case EEXIST: return DRFLAC_ALREADY_EXISTS; |
| 7979 | #endif |
| 7980 | #ifdef EXDEV |
| 7981 | case EXDEV: return DRFLAC_ERROR; |
| 7982 | #endif |
| 7983 | #ifdef ENODEV |
| 7984 | case ENODEV: return DRFLAC_DOES_NOT_EXIST; |
| 7985 | #endif |
| 7986 | #ifdef ENOTDIR |
| 7987 | case ENOTDIR: return DRFLAC_NOT_DIRECTORY; |
| 7988 | #endif |
| 7989 | #ifdef EISDIR |
| 7990 | case EISDIR: return DRFLAC_IS_DIRECTORY; |
| 7991 | #endif |
| 7992 | #ifdef EINVAL |
| 7993 | case EINVAL: return DRFLAC_INVALID_ARGS; |
| 7994 | #endif |
| 7995 | #ifdef ENFILE |
| 7996 | case ENFILE: return DRFLAC_TOO_MANY_OPEN_FILES; |
| 7997 | #endif |
| 7998 | #ifdef EMFILE |
| 7999 | case EMFILE: return DRFLAC_TOO_MANY_OPEN_FILES; |
| 8000 | #endif |
| 8001 | #ifdef ENOTTY |
| 8002 | case ENOTTY: return DRFLAC_INVALID_OPERATION; |
| 8003 | #endif |
| 8004 | #ifdef ETXTBSY |
| 8005 | case ETXTBSY: return DRFLAC_BUSY; |
| 8006 | #endif |
| 8007 | #ifdef EFBIG |
| 8008 | case EFBIG: return DRFLAC_TOO_BIG; |
| 8009 | #endif |
| 8010 | #ifdef ENOSPC |
| 8011 | case ENOSPC: return DRFLAC_NO_SPACE; |
| 8012 | #endif |
| 8013 | #ifdef ESPIPE |
| 8014 | case ESPIPE: return DRFLAC_BAD_SEEK; |
| 8015 | #endif |
| 8016 | #ifdef EROFS |
| 8017 | case EROFS: return DRFLAC_ACCESS_DENIED; |
| 8018 | #endif |
| 8019 | #ifdef EMLINK |
| 8020 | case EMLINK: return DRFLAC_TOO_MANY_LINKS; |
| 8021 | #endif |
| 8022 | #ifdef EPIPE |
| 8023 | case EPIPE: return DRFLAC_BAD_PIPE; |
| 8024 | #endif |
| 8025 | #ifdef EDOM |
| 8026 | case EDOM: return DRFLAC_OUT_OF_RANGE; |
| 8027 | #endif |
| 8028 | #ifdef ERANGE |
| 8029 | case ERANGE: return DRFLAC_OUT_OF_RANGE; |
| 8030 | #endif |
| 8031 | #ifdef EDEADLK |
| 8032 | case EDEADLK: return DRFLAC_DEADLOCK; |
| 8033 | #endif |
| 8034 | #ifdef ENAMETOOLONG |
| 8035 | case ENAMETOOLONG: return DRFLAC_PATH_TOO_LONG; |
| 8036 | #endif |
| 8037 | #ifdef ENOLCK |
| 8038 | case ENOLCK: return DRFLAC_ERROR; |
| 8039 | #endif |
| 8040 | #ifdef ENOSYS |
| 8041 | case ENOSYS: return DRFLAC_NOT_IMPLEMENTED; |
| 8042 | #endif |
| 8043 | #ifdef ENOTEMPTY |
| 8044 | case ENOTEMPTY: return DRFLAC_DIRECTORY_NOT_EMPTY; |
| 8045 | #endif |
| 8046 | #ifdef ELOOP |
| 8047 | case ELOOP: return DRFLAC_TOO_MANY_LINKS; |
| 8048 | #endif |
| 8049 | #ifdef ENOMSG |
| 8050 | case ENOMSG: return DRFLAC_NO_MESSAGE; |
| 8051 | #endif |
| 8052 | #ifdef EIDRM |
| 8053 | case EIDRM: return DRFLAC_ERROR; |
| 8054 | #endif |
| 8055 | #ifdef ECHRNG |
| 8056 | case ECHRNG: return DRFLAC_ERROR; |
| 8057 | #endif |
| 8058 | #ifdef EL2NSYNC |
| 8059 | case EL2NSYNC: return DRFLAC_ERROR; |
| 8060 | #endif |
| 8061 | #ifdef EL3HLT |
| 8062 | case EL3HLT: return DRFLAC_ERROR; |
| 8063 | #endif |
| 8064 | #ifdef EL3RST |
| 8065 | case EL3RST: return DRFLAC_ERROR; |
| 8066 | #endif |
| 8067 | #ifdef ELNRNG |
| 8068 | case ELNRNG: return DRFLAC_OUT_OF_RANGE; |
| 8069 | #endif |
| 8070 | #ifdef EUNATCH |
| 8071 | case EUNATCH: return DRFLAC_ERROR; |
| 8072 | #endif |
| 8073 | #ifdef ENOCSI |
| 8074 | case ENOCSI: return DRFLAC_ERROR; |
| 8075 | #endif |
| 8076 | #ifdef EL2HLT |
| 8077 | case EL2HLT: return DRFLAC_ERROR; |
| 8078 | #endif |
| 8079 | #ifdef EBADE |
| 8080 | case EBADE: return DRFLAC_ERROR; |
| 8081 | #endif |
| 8082 | #ifdef EBADR |
| 8083 | case EBADR: return DRFLAC_ERROR; |
| 8084 | #endif |
| 8085 | #ifdef EXFULL |
| 8086 | case EXFULL: return DRFLAC_ERROR; |
| 8087 | #endif |
| 8088 | #ifdef ENOANO |
| 8089 | case ENOANO: return DRFLAC_ERROR; |
| 8090 | #endif |
| 8091 | #ifdef EBADRQC |
| 8092 | case EBADRQC: return DRFLAC_ERROR; |
| 8093 | #endif |
| 8094 | #ifdef EBADSLT |
| 8095 | case EBADSLT: return DRFLAC_ERROR; |
| 8096 | #endif |
| 8097 | #ifdef EBFONT |
| 8098 | case EBFONT: return DRFLAC_INVALID_FILE; |
| 8099 | #endif |
| 8100 | #ifdef ENOSTR |
| 8101 | case ENOSTR: return DRFLAC_ERROR; |
| 8102 | #endif |
| 8103 | #ifdef ENODATA |
| 8104 | case ENODATA: return DRFLAC_NO_DATA_AVAILABLE; |
| 8105 | #endif |
| 8106 | #ifdef ETIME |
| 8107 | case ETIME: return DRFLAC_TIMEOUT; |
| 8108 | #endif |
| 8109 | #ifdef ENOSR |
| 8110 | case ENOSR: return DRFLAC_NO_DATA_AVAILABLE; |
| 8111 | #endif |
| 8112 | #ifdef ENONET |
| 8113 | case ENONET: return DRFLAC_NO_NETWORK; |
| 8114 | #endif |
| 8115 | #ifdef ENOPKG |
| 8116 | case ENOPKG: return DRFLAC_ERROR; |
| 8117 | #endif |
| 8118 | #ifdef EREMOTE |
| 8119 | case EREMOTE: return DRFLAC_ERROR; |
| 8120 | #endif |
| 8121 | #ifdef ENOLINK |
| 8122 | case ENOLINK: return DRFLAC_ERROR; |
| 8123 | #endif |
| 8124 | #ifdef EADV |
| 8125 | case EADV: return DRFLAC_ERROR; |
| 8126 | #endif |
| 8127 | #ifdef ESRMNT |
| 8128 | case ESRMNT: return DRFLAC_ERROR; |
| 8129 | #endif |
| 8130 | #ifdef ECOMM |
| 8131 | case ECOMM: return DRFLAC_ERROR; |
| 8132 | #endif |
| 8133 | #ifdef EPROTO |
| 8134 | case EPROTO: return DRFLAC_ERROR; |
| 8135 | #endif |
| 8136 | #ifdef EMULTIHOP |
| 8137 | case EMULTIHOP: return DRFLAC_ERROR; |
| 8138 | #endif |
| 8139 | #ifdef EDOTDOT |
| 8140 | case EDOTDOT: return DRFLAC_ERROR; |
| 8141 | #endif |
| 8142 | #ifdef EBADMSG |
| 8143 | case EBADMSG: return DRFLAC_BAD_MESSAGE; |
| 8144 | #endif |
| 8145 | #ifdef EOVERFLOW |
| 8146 | case EOVERFLOW: return DRFLAC_TOO_BIG; |
| 8147 | #endif |
| 8148 | #ifdef ENOTUNIQ |
| 8149 | case ENOTUNIQ: return DRFLAC_NOT_UNIQUE; |
| 8150 | #endif |
| 8151 | #ifdef EBADFD |
| 8152 | case EBADFD: return DRFLAC_ERROR; |
| 8153 | #endif |
| 8154 | #ifdef EREMCHG |
| 8155 | case EREMCHG: return DRFLAC_ERROR; |
| 8156 | #endif |
| 8157 | #ifdef ELIBACC |
| 8158 | case ELIBACC: return DRFLAC_ACCESS_DENIED; |
| 8159 | #endif |
| 8160 | #ifdef ELIBBAD |
| 8161 | case ELIBBAD: return DRFLAC_INVALID_FILE; |
| 8162 | #endif |
| 8163 | #ifdef ELIBSCN |
| 8164 | case ELIBSCN: return DRFLAC_INVALID_FILE; |
| 8165 | #endif |
| 8166 | #ifdef ELIBMAX |
| 8167 | case ELIBMAX: return DRFLAC_ERROR; |
| 8168 | #endif |
| 8169 | #ifdef ELIBEXEC |
| 8170 | case ELIBEXEC: return DRFLAC_ERROR; |
| 8171 | #endif |
| 8172 | #ifdef EILSEQ |
| 8173 | case EILSEQ: return DRFLAC_INVALID_DATA; |
| 8174 | #endif |
| 8175 | #ifdef ERESTART |
| 8176 | case ERESTART: return DRFLAC_ERROR; |
| 8177 | #endif |
| 8178 | #ifdef ESTRPIPE |
| 8179 | case ESTRPIPE: return DRFLAC_ERROR; |
| 8180 | #endif |
| 8181 | #ifdef EUSERS |
| 8182 | case EUSERS: return DRFLAC_ERROR; |
| 8183 | #endif |
| 8184 | #ifdef ENOTSOCK |
| 8185 | case ENOTSOCK: return DRFLAC_NOT_SOCKET; |
| 8186 | #endif |
| 8187 | #ifdef EDESTADDRREQ |
| 8188 | case EDESTADDRREQ: return DRFLAC_NO_ADDRESS; |
| 8189 | #endif |
| 8190 | #ifdef EMSGSIZE |
| 8191 | case EMSGSIZE: return DRFLAC_TOO_BIG; |
| 8192 | #endif |
| 8193 | #ifdef EPROTOTYPE |
| 8194 | case EPROTOTYPE: return DRFLAC_BAD_PROTOCOL; |
| 8195 | #endif |
| 8196 | #ifdef ENOPROTOOPT |
| 8197 | case ENOPROTOOPT: return DRFLAC_PROTOCOL_UNAVAILABLE; |
| 8198 | #endif |
| 8199 | #ifdef EPROTONOSUPPORT |
| 8200 | case EPROTONOSUPPORT: return DRFLAC_PROTOCOL_NOT_SUPPORTED; |
| 8201 | #endif |
| 8202 | #ifdef ESOCKTNOSUPPORT |
| 8203 | case ESOCKTNOSUPPORT: return DRFLAC_SOCKET_NOT_SUPPORTED; |
| 8204 | #endif |
| 8205 | #ifdef EOPNOTSUPP |
| 8206 | case EOPNOTSUPP: return DRFLAC_INVALID_OPERATION; |
| 8207 | #endif |
| 8208 | #ifdef EPFNOSUPPORT |
| 8209 | case EPFNOSUPPORT: return DRFLAC_PROTOCOL_FAMILY_NOT_SUPPORTED; |
| 8210 | #endif |
| 8211 | #ifdef EAFNOSUPPORT |
| 8212 | case EAFNOSUPPORT: return DRFLAC_ADDRESS_FAMILY_NOT_SUPPORTED; |
| 8213 | #endif |
| 8214 | #ifdef EADDRINUSE |
| 8215 | case EADDRINUSE: return DRFLAC_ALREADY_IN_USE; |
| 8216 | #endif |
| 8217 | #ifdef EADDRNOTAVAIL |
| 8218 | case EADDRNOTAVAIL: return DRFLAC_ERROR; |
| 8219 | #endif |
| 8220 | #ifdef ENETDOWN |
| 8221 | case ENETDOWN: return DRFLAC_NO_NETWORK; |
| 8222 | #endif |
| 8223 | #ifdef ENETUNREACH |
| 8224 | case ENETUNREACH: return DRFLAC_NO_NETWORK; |
| 8225 | #endif |
| 8226 | #ifdef ENETRESET |
| 8227 | case ENETRESET: return DRFLAC_NO_NETWORK; |
| 8228 | #endif |
| 8229 | #ifdef ECONNABORTED |
| 8230 | case ECONNABORTED: return DRFLAC_NO_NETWORK; |
| 8231 | #endif |
| 8232 | #ifdef ECONNRESET |
| 8233 | case ECONNRESET: return DRFLAC_CONNECTION_RESET; |
| 8234 | #endif |
| 8235 | #ifdef ENOBUFS |
| 8236 | case ENOBUFS: return DRFLAC_NO_SPACE; |
| 8237 | #endif |
| 8238 | #ifdef EISCONN |
| 8239 | case EISCONN: return DRFLAC_ALREADY_CONNECTED; |
| 8240 | #endif |
| 8241 | #ifdef ENOTCONN |
| 8242 | case ENOTCONN: return DRFLAC_NOT_CONNECTED; |
| 8243 | #endif |
| 8244 | #ifdef ESHUTDOWN |
| 8245 | case ESHUTDOWN: return DRFLAC_ERROR; |
| 8246 | #endif |
| 8247 | #ifdef ETOOMANYREFS |
| 8248 | case ETOOMANYREFS: return DRFLAC_ERROR; |
| 8249 | #endif |
| 8250 | #ifdef ETIMEDOUT |
| 8251 | case ETIMEDOUT: return DRFLAC_TIMEOUT; |
| 8252 | #endif |
| 8253 | #ifdef ECONNREFUSED |
| 8254 | case ECONNREFUSED: return DRFLAC_CONNECTION_REFUSED; |
| 8255 | #endif |
| 8256 | #ifdef EHOSTDOWN |
| 8257 | case EHOSTDOWN: return DRFLAC_NO_HOST; |
| 8258 | #endif |
| 8259 | #ifdef EHOSTUNREACH |
| 8260 | case EHOSTUNREACH: return DRFLAC_NO_HOST; |
| 8261 | #endif |
| 8262 | #ifdef EALREADY |
| 8263 | case EALREADY: return DRFLAC_IN_PROGRESS; |
| 8264 | #endif |
| 8265 | #ifdef EINPROGRESS |
| 8266 | case EINPROGRESS: return DRFLAC_IN_PROGRESS; |
| 8267 | #endif |
| 8268 | #ifdef ESTALE |
| 8269 | case ESTALE: return DRFLAC_INVALID_FILE; |
| 8270 | #endif |
| 8271 | #ifdef EUCLEAN |
| 8272 | case EUCLEAN: return DRFLAC_ERROR; |
| 8273 | #endif |
| 8274 | #ifdef ENOTNAM |
| 8275 | case ENOTNAM: return DRFLAC_ERROR; |
| 8276 | #endif |
| 8277 | #ifdef ENAVAIL |
| 8278 | case ENAVAIL: return DRFLAC_ERROR; |
| 8279 | #endif |
| 8280 | #ifdef EISNAM |
| 8281 | case EISNAM: return DRFLAC_ERROR; |
| 8282 | #endif |
| 8283 | #ifdef EREMOTEIO |
| 8284 | case EREMOTEIO: return DRFLAC_IO_ERROR; |
| 8285 | #endif |
| 8286 | #ifdef EDQUOT |
| 8287 | case EDQUOT: return DRFLAC_NO_SPACE; |
| 8288 | #endif |
| 8289 | #ifdef ENOMEDIUM |
| 8290 | case ENOMEDIUM: return DRFLAC_DOES_NOT_EXIST; |
| 8291 | #endif |
| 8292 | #ifdef EMEDIUMTYPE |
| 8293 | case EMEDIUMTYPE: return DRFLAC_ERROR; |
| 8294 | #endif |
| 8295 | #ifdef ECANCELED |
| 8296 | case ECANCELED: return DRFLAC_CANCELLED; |
| 8297 | #endif |
| 8298 | #ifdef ENOKEY |
| 8299 | case ENOKEY: return DRFLAC_ERROR; |
| 8300 | #endif |
| 8301 | #ifdef EKEYEXPIRED |
| 8302 | case EKEYEXPIRED: return DRFLAC_ERROR; |
| 8303 | #endif |
| 8304 | #ifdef EKEYREVOKED |
| 8305 | case EKEYREVOKED: return DRFLAC_ERROR; |
| 8306 | #endif |
| 8307 | #ifdef EKEYREJECTED |
| 8308 | case EKEYREJECTED: return DRFLAC_ERROR; |
| 8309 | #endif |
| 8310 | #ifdef EOWNERDEAD |
| 8311 | case EOWNERDEAD: return DRFLAC_ERROR; |
| 8312 | #endif |
| 8313 | #ifdef ENOTRECOVERABLE |
| 8314 | case ENOTRECOVERABLE: return DRFLAC_ERROR; |
| 8315 | #endif |
| 8316 | #ifdef ERFKILL |
| 8317 | case ERFKILL: return DRFLAC_ERROR; |
| 8318 | #endif |
| 8319 | #ifdef EHWPOISON |
| 8320 | case EHWPOISON: return DRFLAC_ERROR; |
| 8321 | #endif |
| 8322 | default: return DRFLAC_ERROR; |
| 8323 | } |
| 8324 | } |
| 8325 | |
| 8326 | static drflac_result drflac_fopen(FILE** ppFile, const char* pFilePath, const char* pOpenMode) |
| 8327 | { |
| 8328 | #if defined(_MSC_VER) && _MSC_VER >= 1400 |
| 8329 | errno_t err; |
| 8330 | #endif |
| 8331 | |
| 8332 | if (ppFile != NULL) { |
| 8333 | *ppFile = NULL; /* Safety. */ |
| 8334 | } |
| 8335 | |
| 8336 | if (pFilePath == NULL || pOpenMode == NULL || ppFile == NULL) { |
| 8337 | return DRFLAC_INVALID_ARGS; |
| 8338 | } |
| 8339 | |
| 8340 | #if defined(_MSC_VER) && _MSC_VER >= 1400 |
| 8341 | err = fopen_s(ppFile, pFilePath, pOpenMode); |
| 8342 | if (err != 0) { |
| 8343 | return drflac_result_from_errno(err); |
| 8344 | } |
| 8345 | #else |
| 8346 | #if defined(_WIN32) || defined(__APPLE__) |
| 8347 | *ppFile = fopen(pFilePath, pOpenMode); |
| 8348 | #else |
| 8349 | #if defined(_FILE_OFFSET_BITS) && _FILE_OFFSET_BITS == 64 && defined(_LARGEFILE64_SOURCE) |
| 8350 | *ppFile = fopen64(pFilePath, pOpenMode); |
| 8351 | #else |
| 8352 | *ppFile = fopen(pFilePath, pOpenMode); |
| 8353 | #endif |
| 8354 | #endif |
| 8355 | if (*ppFile == NULL) { |
| 8356 | drflac_result result = drflac_result_from_errno(errno); |
| 8357 | if (result == DRFLAC_SUCCESS) { |
| 8358 | result = DRFLAC_ERROR; /* Just a safety check to make sure we never ever return success when pFile == NULL. */ |
| 8359 | } |
| 8360 | |
| 8361 | return result; |
| 8362 | } |
| 8363 | #endif |
| 8364 | |
| 8365 | return DRFLAC_SUCCESS; |
| 8366 | } |
| 8367 | |
| 8368 | /* |
| 8369 | _wfopen() isn't always available in all compilation environments. |
| 8370 | |
| 8371 | * Windows only. |
| 8372 | * MSVC seems to support it universally as far back as VC6 from what I can tell (haven't checked further back). |
| 8373 | * MinGW-64 (both 32- and 64-bit) seems to support it. |
| 8374 | * MinGW wraps it in !defined(__STRICT_ANSI__). |
| 8375 | * OpenWatcom wraps it in !defined(_NO_EXT_KEYS). |
| 8376 | |
| 8377 | This can be reviewed as compatibility issues arise. The preference is to use _wfopen_s() and _wfopen() as opposed to the wcsrtombs() |
| 8378 | fallback, so if you notice your compiler not detecting this properly I'm happy to look at adding support. |
| 8379 | */ |
| 8380 | #if defined(_WIN32) |
| 8381 | #if defined(_MSC_VER) || defined(__MINGW64__) || (!defined(__STRICT_ANSI__) && !defined(_NO_EXT_KEYS)) |
| 8382 | #define DRFLAC_HAS_WFOPEN |
| 8383 | #endif |
| 8384 | #endif |
| 8385 | |
| 8386 | static drflac_result drflac_wfopen(FILE** ppFile, const wchar_t* pFilePath, const wchar_t* pOpenMode, const drflac_allocation_callbacks* pAllocationCallbacks) |
| 8387 | { |
| 8388 | if (ppFile != NULL) { |
| 8389 | *ppFile = NULL; /* Safety. */ |
| 8390 | } |
| 8391 | |
| 8392 | if (pFilePath == NULL || pOpenMode == NULL || ppFile == NULL) { |
| 8393 | return DRFLAC_INVALID_ARGS; |
| 8394 | } |
| 8395 | |
| 8396 | #if defined(DRFLAC_HAS_WFOPEN) |
| 8397 | { |
| 8398 | /* Use _wfopen() on Windows. */ |
| 8399 | #if defined(_MSC_VER) && _MSC_VER >= 1400 |
| 8400 | errno_t err = _wfopen_s(ppFile, pFilePath, pOpenMode); |
| 8401 | if (err != 0) { |
| 8402 | return drflac_result_from_errno(err); |
| 8403 | } |
| 8404 | #else |
| 8405 | *ppFile = _wfopen(pFilePath, pOpenMode); |
| 8406 | if (*ppFile == NULL) { |
| 8407 | return drflac_result_from_errno(errno); |
| 8408 | } |
| 8409 | #endif |
| 8410 | (void)pAllocationCallbacks; |
| 8411 | } |
| 8412 | #else |
| 8413 | /* |
| 8414 | Use fopen() on anything other than Windows. Requires a conversion. This is annoying because fopen() is locale specific. The only real way I can |
| 8415 | think of to do this is with wcsrtombs(). Note that wcstombs() is apparently not thread-safe because it uses a static global mbstate_t object for |
| 8416 | maintaining state. I've checked this with -std=c89 and it works, but if somebody get's a compiler error I'll look into improving compatibility. |
| 8417 | */ |
| 8418 | { |
| 8419 | mbstate_t mbs; |
| 8420 | size_t lenMB; |
| 8421 | const wchar_t* pFilePathTemp = pFilePath; |
| 8422 | char* pFilePathMB = NULL; |
| 8423 | char pOpenModeMB[32] = {0}; |
| 8424 | |
| 8425 | /* Get the length first. */ |
| 8426 | DRFLAC_ZERO_OBJECT(&mbs); |
| 8427 | lenMB = wcsrtombs(NULL, &pFilePathTemp, 0, &mbs); |
| 8428 | if (lenMB == (size_t)-1) { |
| 8429 | return drflac_result_from_errno(errno); |
| 8430 | } |
| 8431 | |
| 8432 | pFilePathMB = (char*)drflac__malloc_from_callbacks(lenMB + 1, pAllocationCallbacks); |
| 8433 | if (pFilePathMB == NULL) { |
| 8434 | return DRFLAC_OUT_OF_MEMORY; |
| 8435 | } |
| 8436 | |
| 8437 | pFilePathTemp = pFilePath; |
| 8438 | DRFLAC_ZERO_OBJECT(&mbs); |
| 8439 | wcsrtombs(pFilePathMB, &pFilePathTemp, lenMB + 1, &mbs); |
| 8440 | |
| 8441 | /* The open mode should always consist of ASCII characters so we should be able to do a trivial conversion. */ |
| 8442 | { |
| 8443 | size_t i = 0; |
| 8444 | for (;;) { |
| 8445 | if (pOpenMode[i] == 0) { |
| 8446 | pOpenModeMB[i] = '\0'; |
| 8447 | break; |
| 8448 | } |
| 8449 | |
| 8450 | pOpenModeMB[i] = (char)pOpenMode[i]; |
| 8451 | i += 1; |
| 8452 | } |
| 8453 | } |
| 8454 | |
| 8455 | *ppFile = fopen(pFilePathMB, pOpenModeMB); |
| 8456 | |
| 8457 | drflac__free_from_callbacks(pFilePathMB, pAllocationCallbacks); |
| 8458 | } |
| 8459 | |
| 8460 | if (*ppFile == NULL) { |
| 8461 | return DRFLAC_ERROR; |
| 8462 | } |
| 8463 | #endif |
| 8464 | |
| 8465 | return DRFLAC_SUCCESS; |
| 8466 | } |
| 8467 | |
| 8468 | static size_t drflac__on_read_stdio(void* pUserData, void* bufferOut, size_t bytesToRead) |
| 8469 | { |
| 8470 | return fread(bufferOut, 1, bytesToRead, (FILE*)pUserData); |
| 8471 | } |
| 8472 | |
| 8473 | static drflac_bool32 drflac__on_seek_stdio(void* pUserData, int offset, drflac_seek_origin origin) |
| 8474 | { |
| 8475 | DRFLAC_ASSERT(offset >= 0); /* <-- Never seek backwards. */ |
| 8476 | |
| 8477 | return fseek((FILE*)pUserData, offset, (origin == drflac_seek_origin_current) ? SEEK_CUR : SEEK_SET) == 0; |
| 8478 | } |
| 8479 | |
| 8480 | |
| 8481 | DRFLAC_API drflac* drflac_open_file(const char* pFileName, const drflac_allocation_callbacks* pAllocationCallbacks) |
| 8482 | { |
| 8483 | drflac* pFlac; |
| 8484 | FILE* pFile; |
| 8485 | |
| 8486 | if (drflac_fopen(&pFile, pFileName, "rb") != DRFLAC_SUCCESS) { |
| 8487 | return NULL; |
| 8488 | } |
| 8489 | |
| 8490 | pFlac = drflac_open(drflac__on_read_stdio, drflac__on_seek_stdio, (void*)pFile, pAllocationCallbacks); |
| 8491 | if (pFlac == NULL) { |
| 8492 | fclose(pFile); |
| 8493 | return NULL; |
| 8494 | } |
| 8495 | |
| 8496 | return pFlac; |
| 8497 | } |
| 8498 | |
| 8499 | DRFLAC_API drflac* drflac_open_file_w(const wchar_t* pFileName, const drflac_allocation_callbacks* pAllocationCallbacks) |
| 8500 | { |
| 8501 | drflac* pFlac; |
| 8502 | FILE* pFile; |
| 8503 | |
| 8504 | if (drflac_wfopen(&pFile, pFileName, L"rb", pAllocationCallbacks) != DRFLAC_SUCCESS) { |
| 8505 | return NULL; |
| 8506 | } |
| 8507 | |
| 8508 | pFlac = drflac_open(drflac__on_read_stdio, drflac__on_seek_stdio, (void*)pFile, pAllocationCallbacks); |
| 8509 | if (pFlac == NULL) { |
| 8510 | fclose(pFile); |
| 8511 | return NULL; |
| 8512 | } |
| 8513 | |
| 8514 | return pFlac; |
| 8515 | } |
| 8516 | |
| 8517 | DRFLAC_API drflac* drflac_open_file_with_metadata(const char* pFileName, drflac_meta_proc onMeta, void* pUserData, const drflac_allocation_callbacks* pAllocationCallbacks) |
| 8518 | { |
| 8519 | drflac* pFlac; |
| 8520 | FILE* pFile; |
| 8521 | |
| 8522 | if (drflac_fopen(&pFile, pFileName, "rb") != DRFLAC_SUCCESS) { |
| 8523 | return NULL; |
| 8524 | } |
| 8525 | |
| 8526 | pFlac = drflac_open_with_metadata_private(drflac__on_read_stdio, drflac__on_seek_stdio, onMeta, drflac_container_unknown, (void*)pFile, pUserData, pAllocationCallbacks); |
| 8527 | if (pFlac == NULL) { |
| 8528 | fclose(pFile); |
| 8529 | return pFlac; |
| 8530 | } |
| 8531 | |
| 8532 | return pFlac; |
| 8533 | } |
| 8534 | |
| 8535 | DRFLAC_API drflac* drflac_open_file_with_metadata_w(const wchar_t* pFileName, drflac_meta_proc onMeta, void* pUserData, const drflac_allocation_callbacks* pAllocationCallbacks) |
| 8536 | { |
| 8537 | drflac* pFlac; |
| 8538 | FILE* pFile; |
| 8539 | |
| 8540 | if (drflac_wfopen(&pFile, pFileName, L"rb", pAllocationCallbacks) != DRFLAC_SUCCESS) { |
| 8541 | return NULL; |
| 8542 | } |
| 8543 | |
| 8544 | pFlac = drflac_open_with_metadata_private(drflac__on_read_stdio, drflac__on_seek_stdio, onMeta, drflac_container_unknown, (void*)pFile, pUserData, pAllocationCallbacks); |
| 8545 | if (pFlac == NULL) { |
| 8546 | fclose(pFile); |
| 8547 | return pFlac; |
| 8548 | } |
| 8549 | |
| 8550 | return pFlac; |
| 8551 | } |
| 8552 | #endif /* DR_FLAC_NO_STDIO */ |
| 8553 | |
| 8554 | static size_t drflac__on_read_memory(void* pUserData, void* bufferOut, size_t bytesToRead) |
| 8555 | { |
| 8556 | drflac__memory_stream* memoryStream = (drflac__memory_stream*)pUserData; |
| 8557 | size_t bytesRemaining; |
| 8558 | |
| 8559 | DRFLAC_ASSERT(memoryStream != NULL); |
| 8560 | DRFLAC_ASSERT(memoryStream->dataSize >= memoryStream->currentReadPos); |
| 8561 | |
| 8562 | bytesRemaining = memoryStream->dataSize - memoryStream->currentReadPos; |
| 8563 | if (bytesToRead > bytesRemaining) { |
| 8564 | bytesToRead = bytesRemaining; |
| 8565 | } |
| 8566 | |
| 8567 | if (bytesToRead > 0) { |
| 8568 | DRFLAC_COPY_MEMORY(bufferOut, memoryStream->data + memoryStream->currentReadPos, bytesToRead); |
| 8569 | memoryStream->currentReadPos += bytesToRead; |
| 8570 | } |
| 8571 | |
| 8572 | return bytesToRead; |
| 8573 | } |
| 8574 | |
| 8575 | static drflac_bool32 drflac__on_seek_memory(void* pUserData, int offset, drflac_seek_origin origin) |
| 8576 | { |
| 8577 | drflac__memory_stream* memoryStream = (drflac__memory_stream*)pUserData; |
| 8578 | |
| 8579 | DRFLAC_ASSERT(memoryStream != NULL); |
| 8580 | DRFLAC_ASSERT(offset >= 0); /* <-- Never seek backwards. */ |
| 8581 | |
| 8582 | if (offset > (drflac_int64)memoryStream->dataSize) { |
| 8583 | return DRFLAC_FALSE; |
| 8584 | } |
| 8585 | |
| 8586 | if (origin == drflac_seek_origin_current) { |
| 8587 | if (memoryStream->currentReadPos + offset <= memoryStream->dataSize) { |
| 8588 | memoryStream->currentReadPos += offset; |
| 8589 | } else { |
| 8590 | return DRFLAC_FALSE; /* Trying to seek too far forward. */ |
| 8591 | } |
| 8592 | } else { |
| 8593 | if ((drflac_uint32)offset <= memoryStream->dataSize) { |
| 8594 | memoryStream->currentReadPos = offset; |
| 8595 | } else { |
| 8596 | return DRFLAC_FALSE; /* Trying to seek too far forward. */ |
| 8597 | } |
| 8598 | } |
| 8599 | |
| 8600 | return DRFLAC_TRUE; |
| 8601 | } |
| 8602 | |
| 8603 | DRFLAC_API drflac* drflac_open_memory(const void* pData, size_t dataSize, const drflac_allocation_callbacks* pAllocationCallbacks) |
| 8604 | { |
| 8605 | drflac__memory_stream memoryStream; |
| 8606 | drflac* pFlac; |
| 8607 | |
| 8608 | memoryStream.data = (const drflac_uint8*)pData; |
| 8609 | memoryStream.dataSize = dataSize; |
| 8610 | memoryStream.currentReadPos = 0; |
| 8611 | pFlac = drflac_open(drflac__on_read_memory, drflac__on_seek_memory, &memoryStream, pAllocationCallbacks); |
| 8612 | if (pFlac == NULL) { |
| 8613 | return NULL; |
| 8614 | } |
| 8615 | |
| 8616 | pFlac->memoryStream = memoryStream; |
| 8617 | |
| 8618 | /* This is an awful hack... */ |
| 8619 | #ifndef DR_FLAC_NO_OGG |
| 8620 | if (pFlac->container == drflac_container_ogg) |
| 8621 | { |
| 8622 | drflac_oggbs* oggbs = (drflac_oggbs*)pFlac->_oggbs; |
| 8623 | oggbs->pUserData = &pFlac->memoryStream; |
| 8624 | } |
| 8625 | else |
| 8626 | #endif |
| 8627 | { |
| 8628 | pFlac->bs.pUserData = &pFlac->memoryStream; |
| 8629 | } |
| 8630 | |
| 8631 | return pFlac; |
| 8632 | } |
| 8633 | |
| 8634 | DRFLAC_API drflac* drflac_open_memory_with_metadata(const void* pData, size_t dataSize, drflac_meta_proc onMeta, void* pUserData, const drflac_allocation_callbacks* pAllocationCallbacks) |
| 8635 | { |
| 8636 | drflac__memory_stream memoryStream; |
| 8637 | drflac* pFlac; |
| 8638 | |
| 8639 | memoryStream.data = (const drflac_uint8*)pData; |
| 8640 | memoryStream.dataSize = dataSize; |
| 8641 | memoryStream.currentReadPos = 0; |
| 8642 | pFlac = drflac_open_with_metadata_private(drflac__on_read_memory, drflac__on_seek_memory, onMeta, drflac_container_unknown, &memoryStream, pUserData, pAllocationCallbacks); |
| 8643 | if (pFlac == NULL) { |
| 8644 | return NULL; |
| 8645 | } |
| 8646 | |
| 8647 | pFlac->memoryStream = memoryStream; |
| 8648 | |
| 8649 | /* This is an awful hack... */ |
| 8650 | #ifndef DR_FLAC_NO_OGG |
| 8651 | if (pFlac->container == drflac_container_ogg) |
| 8652 | { |
| 8653 | drflac_oggbs* oggbs = (drflac_oggbs*)pFlac->_oggbs; |
| 8654 | oggbs->pUserData = &pFlac->memoryStream; |
| 8655 | } |
| 8656 | else |
| 8657 | #endif |
| 8658 | { |
| 8659 | pFlac->bs.pUserData = &pFlac->memoryStream; |
| 8660 | } |
| 8661 | |
| 8662 | return pFlac; |
| 8663 | } |
| 8664 | |
| 8665 | |
| 8666 | |
| 8667 | DRFLAC_API drflac* drflac_open(drflac_read_proc onRead, drflac_seek_proc onSeek, void* pUserData, const drflac_allocation_callbacks* pAllocationCallbacks) |
| 8668 | { |
| 8669 | return drflac_open_with_metadata_private(onRead, onSeek, NULL, drflac_container_unknown, pUserData, pUserData, pAllocationCallbacks); |
| 8670 | } |
| 8671 | DRFLAC_API drflac* drflac_open_relaxed(drflac_read_proc onRead, drflac_seek_proc onSeek, drflac_container container, void* pUserData, const drflac_allocation_callbacks* pAllocationCallbacks) |
| 8672 | { |
| 8673 | return drflac_open_with_metadata_private(onRead, onSeek, NULL, container, pUserData, pUserData, pAllocationCallbacks); |
| 8674 | } |
| 8675 | |
| 8676 | DRFLAC_API drflac* drflac_open_with_metadata(drflac_read_proc onRead, drflac_seek_proc onSeek, drflac_meta_proc onMeta, void* pUserData, const drflac_allocation_callbacks* pAllocationCallbacks) |
| 8677 | { |
| 8678 | return drflac_open_with_metadata_private(onRead, onSeek, onMeta, drflac_container_unknown, pUserData, pUserData, pAllocationCallbacks); |
| 8679 | } |
| 8680 | DRFLAC_API drflac* drflac_open_with_metadata_relaxed(drflac_read_proc onRead, drflac_seek_proc onSeek, drflac_meta_proc onMeta, drflac_container container, void* pUserData, const drflac_allocation_callbacks* pAllocationCallbacks) |
| 8681 | { |
| 8682 | return drflac_open_with_metadata_private(onRead, onSeek, onMeta, container, pUserData, pUserData, pAllocationCallbacks); |
| 8683 | } |
| 8684 | |
| 8685 | DRFLAC_API void drflac_close(drflac* pFlac) |
| 8686 | { |
| 8687 | if (pFlac == NULL) { |
| 8688 | return; |
| 8689 | } |
| 8690 | |
| 8691 | #ifndef DR_FLAC_NO_STDIO |
| 8692 | /* |
| 8693 | If we opened the file with drflac_open_file() we will want to close the file handle. We can know whether or not drflac_open_file() |
| 8694 | was used by looking at the callbacks. |
| 8695 | */ |
| 8696 | if (pFlac->bs.onRead == drflac__on_read_stdio) { |
| 8697 | fclose((FILE*)pFlac->bs.pUserData); |
| 8698 | } |
| 8699 | |
| 8700 | #ifndef DR_FLAC_NO_OGG |
| 8701 | /* Need to clean up Ogg streams a bit differently due to the way the bit streaming is chained. */ |
| 8702 | if (pFlac->container == drflac_container_ogg) { |
| 8703 | drflac_oggbs* oggbs = (drflac_oggbs*)pFlac->_oggbs; |
| 8704 | DRFLAC_ASSERT(pFlac->bs.onRead == drflac__on_read_ogg); |
| 8705 | |
| 8706 | if (oggbs->onRead == drflac__on_read_stdio) { |
| 8707 | fclose((FILE*)oggbs->pUserData); |
| 8708 | } |
| 8709 | } |
| 8710 | #endif |
| 8711 | #endif |
| 8712 | |
| 8713 | drflac__free_from_callbacks(pFlac, &pFlac->allocationCallbacks); |
| 8714 | } |
| 8715 | |
| 8716 | |
| 8717 | #if 0 |
| 8718 | static DRFLAC_INLINE void drflac_read_pcm_frames_s32__decode_left_side__reference(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int32* pOutputSamples) |
| 8719 | { |
| 8720 | drflac_uint64 i; |
| 8721 | for (i = 0; i < frameCount; ++i) { |
| 8722 | drflac_uint32 left = (drflac_uint32)pInputSamples0[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); |
| 8723 | drflac_uint32 side = (drflac_uint32)pInputSamples1[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); |
| 8724 | drflac_uint32 right = left - side; |
| 8725 | |
| 8726 | pOutputSamples[i*2+0] = (drflac_int32)left; |
| 8727 | pOutputSamples[i*2+1] = (drflac_int32)right; |
| 8728 | } |
| 8729 | } |
| 8730 | #endif |
| 8731 | |
| 8732 | static DRFLAC_INLINE void drflac_read_pcm_frames_s32__decode_left_side__scalar(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int32* pOutputSamples) |
| 8733 | { |
| 8734 | drflac_uint64 i; |
| 8735 | drflac_uint64 frameCount4 = frameCount >> 2; |
| 8736 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
| 8737 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
| 8738 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 8739 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 8740 | |
| 8741 | for (i = 0; i < frameCount4; ++i) { |
| 8742 | drflac_uint32 left0 = pInputSamples0U32[i*4+0] << shift0; |
| 8743 | drflac_uint32 left1 = pInputSamples0U32[i*4+1] << shift0; |
| 8744 | drflac_uint32 left2 = pInputSamples0U32[i*4+2] << shift0; |
| 8745 | drflac_uint32 left3 = pInputSamples0U32[i*4+3] << shift0; |
| 8746 | |
| 8747 | drflac_uint32 side0 = pInputSamples1U32[i*4+0] << shift1; |
| 8748 | drflac_uint32 side1 = pInputSamples1U32[i*4+1] << shift1; |
| 8749 | drflac_uint32 side2 = pInputSamples1U32[i*4+2] << shift1; |
| 8750 | drflac_uint32 side3 = pInputSamples1U32[i*4+3] << shift1; |
| 8751 | |
| 8752 | drflac_uint32 right0 = left0 - side0; |
| 8753 | drflac_uint32 right1 = left1 - side1; |
| 8754 | drflac_uint32 right2 = left2 - side2; |
| 8755 | drflac_uint32 right3 = left3 - side3; |
| 8756 | |
| 8757 | pOutputSamples[i*8+0] = (drflac_int32)left0; |
| 8758 | pOutputSamples[i*8+1] = (drflac_int32)right0; |
| 8759 | pOutputSamples[i*8+2] = (drflac_int32)left1; |
| 8760 | pOutputSamples[i*8+3] = (drflac_int32)right1; |
| 8761 | pOutputSamples[i*8+4] = (drflac_int32)left2; |
| 8762 | pOutputSamples[i*8+5] = (drflac_int32)right2; |
| 8763 | pOutputSamples[i*8+6] = (drflac_int32)left3; |
| 8764 | pOutputSamples[i*8+7] = (drflac_int32)right3; |
| 8765 | } |
| 8766 | |
| 8767 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
| 8768 | drflac_uint32 left = pInputSamples0U32[i] << shift0; |
| 8769 | drflac_uint32 side = pInputSamples1U32[i] << shift1; |
| 8770 | drflac_uint32 right = left - side; |
| 8771 | |
| 8772 | pOutputSamples[i*2+0] = (drflac_int32)left; |
| 8773 | pOutputSamples[i*2+1] = (drflac_int32)right; |
| 8774 | } |
| 8775 | } |
| 8776 | |
| 8777 | #if defined(DRFLAC_SUPPORT_SSE2) |
| 8778 | static DRFLAC_INLINE void drflac_read_pcm_frames_s32__decode_left_side__sse2(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int32* pOutputSamples) |
| 8779 | { |
| 8780 | drflac_uint64 i; |
| 8781 | drflac_uint64 frameCount4 = frameCount >> 2; |
| 8782 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
| 8783 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
| 8784 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 8785 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 8786 | |
| 8787 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
| 8788 | |
| 8789 | for (i = 0; i < frameCount4; ++i) { |
| 8790 | __m128i left = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), shift0); |
| 8791 | __m128i side = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), shift1); |
| 8792 | __m128i right = _mm_sub_epi32(left, side); |
| 8793 | |
| 8794 | _mm_storeu_si128((__m128i*)(pOutputSamples + i*8 + 0), _mm_unpacklo_epi32(left, right)); |
| 8795 | _mm_storeu_si128((__m128i*)(pOutputSamples + i*8 + 4), _mm_unpackhi_epi32(left, right)); |
| 8796 | } |
| 8797 | |
| 8798 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
| 8799 | drflac_uint32 left = pInputSamples0U32[i] << shift0; |
| 8800 | drflac_uint32 side = pInputSamples1U32[i] << shift1; |
| 8801 | drflac_uint32 right = left - side; |
| 8802 | |
| 8803 | pOutputSamples[i*2+0] = (drflac_int32)left; |
| 8804 | pOutputSamples[i*2+1] = (drflac_int32)right; |
| 8805 | } |
| 8806 | } |
| 8807 | #endif |
| 8808 | |
| 8809 | #if defined(DRFLAC_SUPPORT_NEON) |
| 8810 | static DRFLAC_INLINE void drflac_read_pcm_frames_s32__decode_left_side__neon(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int32* pOutputSamples) |
| 8811 | { |
| 8812 | drflac_uint64 i; |
| 8813 | drflac_uint64 frameCount4 = frameCount >> 2; |
| 8814 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
| 8815 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
| 8816 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 8817 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 8818 | int32x4_t shift0_4; |
| 8819 | int32x4_t shift1_4; |
| 8820 | |
| 8821 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
| 8822 | |
| 8823 | shift0_4 = vdupq_n_s32(shift0); |
| 8824 | shift1_4 = vdupq_n_s32(shift1); |
| 8825 | |
| 8826 | for (i = 0; i < frameCount4; ++i) { |
| 8827 | uint32x4_t left; |
| 8828 | uint32x4_t side; |
| 8829 | uint32x4_t right; |
| 8830 | |
| 8831 | left = vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), shift0_4); |
| 8832 | side = vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), shift1_4); |
| 8833 | right = vsubq_u32(left, side); |
| 8834 | |
| 8835 | drflac__vst2q_u32((drflac_uint32*)pOutputSamples + i*8, vzipq_u32(left, right)); |
| 8836 | } |
| 8837 | |
| 8838 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
| 8839 | drflac_uint32 left = pInputSamples0U32[i] << shift0; |
| 8840 | drflac_uint32 side = pInputSamples1U32[i] << shift1; |
| 8841 | drflac_uint32 right = left - side; |
| 8842 | |
| 8843 | pOutputSamples[i*2+0] = (drflac_int32)left; |
| 8844 | pOutputSamples[i*2+1] = (drflac_int32)right; |
| 8845 | } |
| 8846 | } |
| 8847 | #endif |
| 8848 | |
| 8849 | static DRFLAC_INLINE void drflac_read_pcm_frames_s32__decode_left_side(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int32* pOutputSamples) |
| 8850 | { |
| 8851 | #if defined(DRFLAC_SUPPORT_SSE2) |
| 8852 | if (drflac__gIsSSE2Supported && pFlac->bitsPerSample <= 24) { |
| 8853 | drflac_read_pcm_frames_s32__decode_left_side__sse2(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
| 8854 | } else |
| 8855 | #elif defined(DRFLAC_SUPPORT_NEON) |
| 8856 | if (drflac__gIsNEONSupported && pFlac->bitsPerSample <= 24) { |
| 8857 | drflac_read_pcm_frames_s32__decode_left_side__neon(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
| 8858 | } else |
| 8859 | #endif |
| 8860 | { |
| 8861 | /* Scalar fallback. */ |
| 8862 | #if 0 |
| 8863 | drflac_read_pcm_frames_s32__decode_left_side__reference(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
| 8864 | #else |
| 8865 | drflac_read_pcm_frames_s32__decode_left_side__scalar(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
| 8866 | #endif |
| 8867 | } |
| 8868 | } |
| 8869 | |
| 8870 | |
| 8871 | #if 0 |
| 8872 | static DRFLAC_INLINE void drflac_read_pcm_frames_s32__decode_right_side__reference(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int32* pOutputSamples) |
| 8873 | { |
| 8874 | drflac_uint64 i; |
| 8875 | for (i = 0; i < frameCount; ++i) { |
| 8876 | drflac_uint32 side = (drflac_uint32)pInputSamples0[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); |
| 8877 | drflac_uint32 right = (drflac_uint32)pInputSamples1[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); |
| 8878 | drflac_uint32 left = right + side; |
| 8879 | |
| 8880 | pOutputSamples[i*2+0] = (drflac_int32)left; |
| 8881 | pOutputSamples[i*2+1] = (drflac_int32)right; |
| 8882 | } |
| 8883 | } |
| 8884 | #endif |
| 8885 | |
| 8886 | static DRFLAC_INLINE void drflac_read_pcm_frames_s32__decode_right_side__scalar(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int32* pOutputSamples) |
| 8887 | { |
| 8888 | drflac_uint64 i; |
| 8889 | drflac_uint64 frameCount4 = frameCount >> 2; |
| 8890 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
| 8891 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
| 8892 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 8893 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 8894 | |
| 8895 | for (i = 0; i < frameCount4; ++i) { |
| 8896 | drflac_uint32 side0 = pInputSamples0U32[i*4+0] << shift0; |
| 8897 | drflac_uint32 side1 = pInputSamples0U32[i*4+1] << shift0; |
| 8898 | drflac_uint32 side2 = pInputSamples0U32[i*4+2] << shift0; |
| 8899 | drflac_uint32 side3 = pInputSamples0U32[i*4+3] << shift0; |
| 8900 | |
| 8901 | drflac_uint32 right0 = pInputSamples1U32[i*4+0] << shift1; |
| 8902 | drflac_uint32 right1 = pInputSamples1U32[i*4+1] << shift1; |
| 8903 | drflac_uint32 right2 = pInputSamples1U32[i*4+2] << shift1; |
| 8904 | drflac_uint32 right3 = pInputSamples1U32[i*4+3] << shift1; |
| 8905 | |
| 8906 | drflac_uint32 left0 = right0 + side0; |
| 8907 | drflac_uint32 left1 = right1 + side1; |
| 8908 | drflac_uint32 left2 = right2 + side2; |
| 8909 | drflac_uint32 left3 = right3 + side3; |
| 8910 | |
| 8911 | pOutputSamples[i*8+0] = (drflac_int32)left0; |
| 8912 | pOutputSamples[i*8+1] = (drflac_int32)right0; |
| 8913 | pOutputSamples[i*8+2] = (drflac_int32)left1; |
| 8914 | pOutputSamples[i*8+3] = (drflac_int32)right1; |
| 8915 | pOutputSamples[i*8+4] = (drflac_int32)left2; |
| 8916 | pOutputSamples[i*8+5] = (drflac_int32)right2; |
| 8917 | pOutputSamples[i*8+6] = (drflac_int32)left3; |
| 8918 | pOutputSamples[i*8+7] = (drflac_int32)right3; |
| 8919 | } |
| 8920 | |
| 8921 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
| 8922 | drflac_uint32 side = pInputSamples0U32[i] << shift0; |
| 8923 | drflac_uint32 right = pInputSamples1U32[i] << shift1; |
| 8924 | drflac_uint32 left = right + side; |
| 8925 | |
| 8926 | pOutputSamples[i*2+0] = (drflac_int32)left; |
| 8927 | pOutputSamples[i*2+1] = (drflac_int32)right; |
| 8928 | } |
| 8929 | } |
| 8930 | |
| 8931 | #if defined(DRFLAC_SUPPORT_SSE2) |
| 8932 | static DRFLAC_INLINE void drflac_read_pcm_frames_s32__decode_right_side__sse2(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int32* pOutputSamples) |
| 8933 | { |
| 8934 | drflac_uint64 i; |
| 8935 | drflac_uint64 frameCount4 = frameCount >> 2; |
| 8936 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
| 8937 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
| 8938 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 8939 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 8940 | |
| 8941 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
| 8942 | |
| 8943 | for (i = 0; i < frameCount4; ++i) { |
| 8944 | __m128i side = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), shift0); |
| 8945 | __m128i right = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), shift1); |
| 8946 | __m128i left = _mm_add_epi32(right, side); |
| 8947 | |
| 8948 | _mm_storeu_si128((__m128i*)(pOutputSamples + i*8 + 0), _mm_unpacklo_epi32(left, right)); |
| 8949 | _mm_storeu_si128((__m128i*)(pOutputSamples + i*8 + 4), _mm_unpackhi_epi32(left, right)); |
| 8950 | } |
| 8951 | |
| 8952 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
| 8953 | drflac_uint32 side = pInputSamples0U32[i] << shift0; |
| 8954 | drflac_uint32 right = pInputSamples1U32[i] << shift1; |
| 8955 | drflac_uint32 left = right + side; |
| 8956 | |
| 8957 | pOutputSamples[i*2+0] = (drflac_int32)left; |
| 8958 | pOutputSamples[i*2+1] = (drflac_int32)right; |
| 8959 | } |
| 8960 | } |
| 8961 | #endif |
| 8962 | |
| 8963 | #if defined(DRFLAC_SUPPORT_NEON) |
| 8964 | static DRFLAC_INLINE void drflac_read_pcm_frames_s32__decode_right_side__neon(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int32* pOutputSamples) |
| 8965 | { |
| 8966 | drflac_uint64 i; |
| 8967 | drflac_uint64 frameCount4 = frameCount >> 2; |
| 8968 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
| 8969 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
| 8970 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 8971 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 8972 | int32x4_t shift0_4; |
| 8973 | int32x4_t shift1_4; |
| 8974 | |
| 8975 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
| 8976 | |
| 8977 | shift0_4 = vdupq_n_s32(shift0); |
| 8978 | shift1_4 = vdupq_n_s32(shift1); |
| 8979 | |
| 8980 | for (i = 0; i < frameCount4; ++i) { |
| 8981 | uint32x4_t side; |
| 8982 | uint32x4_t right; |
| 8983 | uint32x4_t left; |
| 8984 | |
| 8985 | side = vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), shift0_4); |
| 8986 | right = vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), shift1_4); |
| 8987 | left = vaddq_u32(right, side); |
| 8988 | |
| 8989 | drflac__vst2q_u32((drflac_uint32*)pOutputSamples + i*8, vzipq_u32(left, right)); |
| 8990 | } |
| 8991 | |
| 8992 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
| 8993 | drflac_uint32 side = pInputSamples0U32[i] << shift0; |
| 8994 | drflac_uint32 right = pInputSamples1U32[i] << shift1; |
| 8995 | drflac_uint32 left = right + side; |
| 8996 | |
| 8997 | pOutputSamples[i*2+0] = (drflac_int32)left; |
| 8998 | pOutputSamples[i*2+1] = (drflac_int32)right; |
| 8999 | } |
| 9000 | } |
| 9001 | #endif |
| 9002 | |
| 9003 | static DRFLAC_INLINE void drflac_read_pcm_frames_s32__decode_right_side(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int32* pOutputSamples) |
| 9004 | { |
| 9005 | #if defined(DRFLAC_SUPPORT_SSE2) |
| 9006 | if (drflac__gIsSSE2Supported && pFlac->bitsPerSample <= 24) { |
| 9007 | drflac_read_pcm_frames_s32__decode_right_side__sse2(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
| 9008 | } else |
| 9009 | #elif defined(DRFLAC_SUPPORT_NEON) |
| 9010 | if (drflac__gIsNEONSupported && pFlac->bitsPerSample <= 24) { |
| 9011 | drflac_read_pcm_frames_s32__decode_right_side__neon(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
| 9012 | } else |
| 9013 | #endif |
| 9014 | { |
| 9015 | /* Scalar fallback. */ |
| 9016 | #if 0 |
| 9017 | drflac_read_pcm_frames_s32__decode_right_side__reference(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
| 9018 | #else |
| 9019 | drflac_read_pcm_frames_s32__decode_right_side__scalar(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
| 9020 | #endif |
| 9021 | } |
| 9022 | } |
| 9023 | |
| 9024 | |
| 9025 | #if 0 |
| 9026 | static DRFLAC_INLINE void drflac_read_pcm_frames_s32__decode_mid_side__reference(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int32* pOutputSamples) |
| 9027 | { |
| 9028 | for (drflac_uint64 i = 0; i < frameCount; ++i) { |
| 9029 | drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 9030 | drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 9031 | |
| 9032 | mid = (mid << 1) | (side & 0x01); |
| 9033 | |
| 9034 | pOutputSamples[i*2+0] = (drflac_int32)((drflac_uint32)((drflac_int32)(mid + side) >> 1) << unusedBitsPerSample); |
| 9035 | pOutputSamples[i*2+1] = (drflac_int32)((drflac_uint32)((drflac_int32)(mid - side) >> 1) << unusedBitsPerSample); |
| 9036 | } |
| 9037 | } |
| 9038 | #endif |
| 9039 | |
| 9040 | static DRFLAC_INLINE void drflac_read_pcm_frames_s32__decode_mid_side__scalar(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int32* pOutputSamples) |
| 9041 | { |
| 9042 | drflac_uint64 i; |
| 9043 | drflac_uint64 frameCount4 = frameCount >> 2; |
| 9044 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
| 9045 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
| 9046 | drflac_int32 shift = unusedBitsPerSample; |
| 9047 | |
| 9048 | if (shift > 0) { |
| 9049 | shift -= 1; |
| 9050 | for (i = 0; i < frameCount4; ++i) { |
| 9051 | drflac_uint32 temp0L; |
| 9052 | drflac_uint32 temp1L; |
| 9053 | drflac_uint32 temp2L; |
| 9054 | drflac_uint32 temp3L; |
| 9055 | drflac_uint32 temp0R; |
| 9056 | drflac_uint32 temp1R; |
| 9057 | drflac_uint32 temp2R; |
| 9058 | drflac_uint32 temp3R; |
| 9059 | |
| 9060 | drflac_uint32 mid0 = pInputSamples0U32[i*4+0] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 9061 | drflac_uint32 mid1 = pInputSamples0U32[i*4+1] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 9062 | drflac_uint32 mid2 = pInputSamples0U32[i*4+2] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 9063 | drflac_uint32 mid3 = pInputSamples0U32[i*4+3] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 9064 | |
| 9065 | drflac_uint32 side0 = pInputSamples1U32[i*4+0] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 9066 | drflac_uint32 side1 = pInputSamples1U32[i*4+1] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 9067 | drflac_uint32 side2 = pInputSamples1U32[i*4+2] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 9068 | drflac_uint32 side3 = pInputSamples1U32[i*4+3] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 9069 | |
| 9070 | mid0 = (mid0 << 1) | (side0 & 0x01); |
| 9071 | mid1 = (mid1 << 1) | (side1 & 0x01); |
| 9072 | mid2 = (mid2 << 1) | (side2 & 0x01); |
| 9073 | mid3 = (mid3 << 1) | (side3 & 0x01); |
| 9074 | |
| 9075 | temp0L = (mid0 + side0) << shift; |
| 9076 | temp1L = (mid1 + side1) << shift; |
| 9077 | temp2L = (mid2 + side2) << shift; |
| 9078 | temp3L = (mid3 + side3) << shift; |
| 9079 | |
| 9080 | temp0R = (mid0 - side0) << shift; |
| 9081 | temp1R = (mid1 - side1) << shift; |
| 9082 | temp2R = (mid2 - side2) << shift; |
| 9083 | temp3R = (mid3 - side3) << shift; |
| 9084 | |
| 9085 | pOutputSamples[i*8+0] = (drflac_int32)temp0L; |
| 9086 | pOutputSamples[i*8+1] = (drflac_int32)temp0R; |
| 9087 | pOutputSamples[i*8+2] = (drflac_int32)temp1L; |
| 9088 | pOutputSamples[i*8+3] = (drflac_int32)temp1R; |
| 9089 | pOutputSamples[i*8+4] = (drflac_int32)temp2L; |
| 9090 | pOutputSamples[i*8+5] = (drflac_int32)temp2R; |
| 9091 | pOutputSamples[i*8+6] = (drflac_int32)temp3L; |
| 9092 | pOutputSamples[i*8+7] = (drflac_int32)temp3R; |
| 9093 | } |
| 9094 | } else { |
| 9095 | for (i = 0; i < frameCount4; ++i) { |
| 9096 | drflac_uint32 temp0L; |
| 9097 | drflac_uint32 temp1L; |
| 9098 | drflac_uint32 temp2L; |
| 9099 | drflac_uint32 temp3L; |
| 9100 | drflac_uint32 temp0R; |
| 9101 | drflac_uint32 temp1R; |
| 9102 | drflac_uint32 temp2R; |
| 9103 | drflac_uint32 temp3R; |
| 9104 | |
| 9105 | drflac_uint32 mid0 = pInputSamples0U32[i*4+0] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 9106 | drflac_uint32 mid1 = pInputSamples0U32[i*4+1] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 9107 | drflac_uint32 mid2 = pInputSamples0U32[i*4+2] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 9108 | drflac_uint32 mid3 = pInputSamples0U32[i*4+3] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 9109 | |
| 9110 | drflac_uint32 side0 = pInputSamples1U32[i*4+0] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 9111 | drflac_uint32 side1 = pInputSamples1U32[i*4+1] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 9112 | drflac_uint32 side2 = pInputSamples1U32[i*4+2] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 9113 | drflac_uint32 side3 = pInputSamples1U32[i*4+3] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 9114 | |
| 9115 | mid0 = (mid0 << 1) | (side0 & 0x01); |
| 9116 | mid1 = (mid1 << 1) | (side1 & 0x01); |
| 9117 | mid2 = (mid2 << 1) | (side2 & 0x01); |
| 9118 | mid3 = (mid3 << 1) | (side3 & 0x01); |
| 9119 | |
| 9120 | temp0L = (drflac_uint32)((drflac_int32)(mid0 + side0) >> 1); |
| 9121 | temp1L = (drflac_uint32)((drflac_int32)(mid1 + side1) >> 1); |
| 9122 | temp2L = (drflac_uint32)((drflac_int32)(mid2 + side2) >> 1); |
| 9123 | temp3L = (drflac_uint32)((drflac_int32)(mid3 + side3) >> 1); |
| 9124 | |
| 9125 | temp0R = (drflac_uint32)((drflac_int32)(mid0 - side0) >> 1); |
| 9126 | temp1R = (drflac_uint32)((drflac_int32)(mid1 - side1) >> 1); |
| 9127 | temp2R = (drflac_uint32)((drflac_int32)(mid2 - side2) >> 1); |
| 9128 | temp3R = (drflac_uint32)((drflac_int32)(mid3 - side3) >> 1); |
| 9129 | |
| 9130 | pOutputSamples[i*8+0] = (drflac_int32)temp0L; |
| 9131 | pOutputSamples[i*8+1] = (drflac_int32)temp0R; |
| 9132 | pOutputSamples[i*8+2] = (drflac_int32)temp1L; |
| 9133 | pOutputSamples[i*8+3] = (drflac_int32)temp1R; |
| 9134 | pOutputSamples[i*8+4] = (drflac_int32)temp2L; |
| 9135 | pOutputSamples[i*8+5] = (drflac_int32)temp2R; |
| 9136 | pOutputSamples[i*8+6] = (drflac_int32)temp3L; |
| 9137 | pOutputSamples[i*8+7] = (drflac_int32)temp3R; |
| 9138 | } |
| 9139 | } |
| 9140 | |
| 9141 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
| 9142 | drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 9143 | drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 9144 | |
| 9145 | mid = (mid << 1) | (side & 0x01); |
| 9146 | |
| 9147 | pOutputSamples[i*2+0] = (drflac_int32)((drflac_uint32)((drflac_int32)(mid + side) >> 1) << unusedBitsPerSample); |
| 9148 | pOutputSamples[i*2+1] = (drflac_int32)((drflac_uint32)((drflac_int32)(mid - side) >> 1) << unusedBitsPerSample); |
| 9149 | } |
| 9150 | } |
| 9151 | |
| 9152 | #if defined(DRFLAC_SUPPORT_SSE2) |
| 9153 | static DRFLAC_INLINE void drflac_read_pcm_frames_s32__decode_mid_side__sse2(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int32* pOutputSamples) |
| 9154 | { |
| 9155 | drflac_uint64 i; |
| 9156 | drflac_uint64 frameCount4 = frameCount >> 2; |
| 9157 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
| 9158 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
| 9159 | drflac_int32 shift = unusedBitsPerSample; |
| 9160 | |
| 9161 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
| 9162 | |
| 9163 | if (shift == 0) { |
| 9164 | for (i = 0; i < frameCount4; ++i) { |
| 9165 | __m128i mid; |
| 9166 | __m128i side; |
| 9167 | __m128i left; |
| 9168 | __m128i right; |
| 9169 | |
| 9170 | mid = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); |
| 9171 | side = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); |
| 9172 | |
| 9173 | mid = _mm_or_si128(_mm_slli_epi32(mid, 1), _mm_and_si128(side, _mm_set1_epi32(0x01))); |
| 9174 | |
| 9175 | left = _mm_srai_epi32(_mm_add_epi32(mid, side), 1); |
| 9176 | right = _mm_srai_epi32(_mm_sub_epi32(mid, side), 1); |
| 9177 | |
| 9178 | _mm_storeu_si128((__m128i*)(pOutputSamples + i*8 + 0), _mm_unpacklo_epi32(left, right)); |
| 9179 | _mm_storeu_si128((__m128i*)(pOutputSamples + i*8 + 4), _mm_unpackhi_epi32(left, right)); |
| 9180 | } |
| 9181 | |
| 9182 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
| 9183 | drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 9184 | drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 9185 | |
| 9186 | mid = (mid << 1) | (side & 0x01); |
| 9187 | |
| 9188 | pOutputSamples[i*2+0] = (drflac_int32)(mid + side) >> 1; |
| 9189 | pOutputSamples[i*2+1] = (drflac_int32)(mid - side) >> 1; |
| 9190 | } |
| 9191 | } else { |
| 9192 | shift -= 1; |
| 9193 | for (i = 0; i < frameCount4; ++i) { |
| 9194 | __m128i mid; |
| 9195 | __m128i side; |
| 9196 | __m128i left; |
| 9197 | __m128i right; |
| 9198 | |
| 9199 | mid = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); |
| 9200 | side = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); |
| 9201 | |
| 9202 | mid = _mm_or_si128(_mm_slli_epi32(mid, 1), _mm_and_si128(side, _mm_set1_epi32(0x01))); |
| 9203 | |
| 9204 | left = _mm_slli_epi32(_mm_add_epi32(mid, side), shift); |
| 9205 | right = _mm_slli_epi32(_mm_sub_epi32(mid, side), shift); |
| 9206 | |
| 9207 | _mm_storeu_si128((__m128i*)(pOutputSamples + i*8 + 0), _mm_unpacklo_epi32(left, right)); |
| 9208 | _mm_storeu_si128((__m128i*)(pOutputSamples + i*8 + 4), _mm_unpackhi_epi32(left, right)); |
| 9209 | } |
| 9210 | |
| 9211 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
| 9212 | drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 9213 | drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 9214 | |
| 9215 | mid = (mid << 1) | (side & 0x01); |
| 9216 | |
| 9217 | pOutputSamples[i*2+0] = (drflac_int32)((mid + side) << shift); |
| 9218 | pOutputSamples[i*2+1] = (drflac_int32)((mid - side) << shift); |
| 9219 | } |
| 9220 | } |
| 9221 | } |
| 9222 | #endif |
| 9223 | |
| 9224 | #if defined(DRFLAC_SUPPORT_NEON) |
| 9225 | static DRFLAC_INLINE void drflac_read_pcm_frames_s32__decode_mid_side__neon(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int32* pOutputSamples) |
| 9226 | { |
| 9227 | drflac_uint64 i; |
| 9228 | drflac_uint64 frameCount4 = frameCount >> 2; |
| 9229 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
| 9230 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
| 9231 | drflac_int32 shift = unusedBitsPerSample; |
| 9232 | int32x4_t wbpsShift0_4; /* wbps = Wasted Bits Per Sample */ |
| 9233 | int32x4_t wbpsShift1_4; /* wbps = Wasted Bits Per Sample */ |
| 9234 | uint32x4_t one4; |
| 9235 | |
| 9236 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
| 9237 | |
| 9238 | wbpsShift0_4 = vdupq_n_s32(pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); |
| 9239 | wbpsShift1_4 = vdupq_n_s32(pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); |
| 9240 | one4 = vdupq_n_u32(1); |
| 9241 | |
| 9242 | if (shift == 0) { |
| 9243 | for (i = 0; i < frameCount4; ++i) { |
| 9244 | uint32x4_t mid; |
| 9245 | uint32x4_t side; |
| 9246 | int32x4_t left; |
| 9247 | int32x4_t right; |
| 9248 | |
| 9249 | mid = vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), wbpsShift0_4); |
| 9250 | side = vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), wbpsShift1_4); |
| 9251 | |
| 9252 | mid = vorrq_u32(vshlq_n_u32(mid, 1), vandq_u32(side, one4)); |
| 9253 | |
| 9254 | left = vshrq_n_s32(vreinterpretq_s32_u32(vaddq_u32(mid, side)), 1); |
| 9255 | right = vshrq_n_s32(vreinterpretq_s32_u32(vsubq_u32(mid, side)), 1); |
| 9256 | |
| 9257 | drflac__vst2q_s32(pOutputSamples + i*8, vzipq_s32(left, right)); |
| 9258 | } |
| 9259 | |
| 9260 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
| 9261 | drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 9262 | drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 9263 | |
| 9264 | mid = (mid << 1) | (side & 0x01); |
| 9265 | |
| 9266 | pOutputSamples[i*2+0] = (drflac_int32)(mid + side) >> 1; |
| 9267 | pOutputSamples[i*2+1] = (drflac_int32)(mid - side) >> 1; |
| 9268 | } |
| 9269 | } else { |
| 9270 | int32x4_t shift4; |
| 9271 | |
| 9272 | shift -= 1; |
| 9273 | shift4 = vdupq_n_s32(shift); |
| 9274 | |
| 9275 | for (i = 0; i < frameCount4; ++i) { |
| 9276 | uint32x4_t mid; |
| 9277 | uint32x4_t side; |
| 9278 | int32x4_t left; |
| 9279 | int32x4_t right; |
| 9280 | |
| 9281 | mid = vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), wbpsShift0_4); |
| 9282 | side = vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), wbpsShift1_4); |
| 9283 | |
| 9284 | mid = vorrq_u32(vshlq_n_u32(mid, 1), vandq_u32(side, one4)); |
| 9285 | |
| 9286 | left = vreinterpretq_s32_u32(vshlq_u32(vaddq_u32(mid, side), shift4)); |
| 9287 | right = vreinterpretq_s32_u32(vshlq_u32(vsubq_u32(mid, side), shift4)); |
| 9288 | |
| 9289 | drflac__vst2q_s32(pOutputSamples + i*8, vzipq_s32(left, right)); |
| 9290 | } |
| 9291 | |
| 9292 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
| 9293 | drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 9294 | drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 9295 | |
| 9296 | mid = (mid << 1) | (side & 0x01); |
| 9297 | |
| 9298 | pOutputSamples[i*2+0] = (drflac_int32)((mid + side) << shift); |
| 9299 | pOutputSamples[i*2+1] = (drflac_int32)((mid - side) << shift); |
| 9300 | } |
| 9301 | } |
| 9302 | } |
| 9303 | #endif |
| 9304 | |
| 9305 | static DRFLAC_INLINE void drflac_read_pcm_frames_s32__decode_mid_side(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int32* pOutputSamples) |
| 9306 | { |
| 9307 | #if defined(DRFLAC_SUPPORT_SSE2) |
| 9308 | if (drflac__gIsSSE2Supported && pFlac->bitsPerSample <= 24) { |
| 9309 | drflac_read_pcm_frames_s32__decode_mid_side__sse2(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
| 9310 | } else |
| 9311 | #elif defined(DRFLAC_SUPPORT_NEON) |
| 9312 | if (drflac__gIsNEONSupported && pFlac->bitsPerSample <= 24) { |
| 9313 | drflac_read_pcm_frames_s32__decode_mid_side__neon(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
| 9314 | } else |
| 9315 | #endif |
| 9316 | { |
| 9317 | /* Scalar fallback. */ |
| 9318 | #if 0 |
| 9319 | drflac_read_pcm_frames_s32__decode_mid_side__reference(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
| 9320 | #else |
| 9321 | drflac_read_pcm_frames_s32__decode_mid_side__scalar(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
| 9322 | #endif |
| 9323 | } |
| 9324 | } |
| 9325 | |
| 9326 | |
| 9327 | #if 0 |
| 9328 | static DRFLAC_INLINE void drflac_read_pcm_frames_s32__decode_independent_stereo__reference(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int32* pOutputSamples) |
| 9329 | { |
| 9330 | for (drflac_uint64 i = 0; i < frameCount; ++i) { |
| 9331 | pOutputSamples[i*2+0] = (drflac_int32)((drflac_uint32)pInputSamples0[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample)); |
| 9332 | pOutputSamples[i*2+1] = (drflac_int32)((drflac_uint32)pInputSamples1[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample)); |
| 9333 | } |
| 9334 | } |
| 9335 | #endif |
| 9336 | |
| 9337 | static DRFLAC_INLINE void drflac_read_pcm_frames_s32__decode_independent_stereo__scalar(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int32* pOutputSamples) |
| 9338 | { |
| 9339 | drflac_uint64 i; |
| 9340 | drflac_uint64 frameCount4 = frameCount >> 2; |
| 9341 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
| 9342 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
| 9343 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 9344 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 9345 | |
| 9346 | for (i = 0; i < frameCount4; ++i) { |
| 9347 | drflac_uint32 tempL0 = pInputSamples0U32[i*4+0] << shift0; |
| 9348 | drflac_uint32 tempL1 = pInputSamples0U32[i*4+1] << shift0; |
| 9349 | drflac_uint32 tempL2 = pInputSamples0U32[i*4+2] << shift0; |
| 9350 | drflac_uint32 tempL3 = pInputSamples0U32[i*4+3] << shift0; |
| 9351 | |
| 9352 | drflac_uint32 tempR0 = pInputSamples1U32[i*4+0] << shift1; |
| 9353 | drflac_uint32 tempR1 = pInputSamples1U32[i*4+1] << shift1; |
| 9354 | drflac_uint32 tempR2 = pInputSamples1U32[i*4+2] << shift1; |
| 9355 | drflac_uint32 tempR3 = pInputSamples1U32[i*4+3] << shift1; |
| 9356 | |
| 9357 | pOutputSamples[i*8+0] = (drflac_int32)tempL0; |
| 9358 | pOutputSamples[i*8+1] = (drflac_int32)tempR0; |
| 9359 | pOutputSamples[i*8+2] = (drflac_int32)tempL1; |
| 9360 | pOutputSamples[i*8+3] = (drflac_int32)tempR1; |
| 9361 | pOutputSamples[i*8+4] = (drflac_int32)tempL2; |
| 9362 | pOutputSamples[i*8+5] = (drflac_int32)tempR2; |
| 9363 | pOutputSamples[i*8+6] = (drflac_int32)tempL3; |
| 9364 | pOutputSamples[i*8+7] = (drflac_int32)tempR3; |
| 9365 | } |
| 9366 | |
| 9367 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
| 9368 | pOutputSamples[i*2+0] = (drflac_int32)(pInputSamples0U32[i] << shift0); |
| 9369 | pOutputSamples[i*2+1] = (drflac_int32)(pInputSamples1U32[i] << shift1); |
| 9370 | } |
| 9371 | } |
| 9372 | |
| 9373 | #if defined(DRFLAC_SUPPORT_SSE2) |
| 9374 | static DRFLAC_INLINE void drflac_read_pcm_frames_s32__decode_independent_stereo__sse2(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int32* pOutputSamples) |
| 9375 | { |
| 9376 | drflac_uint64 i; |
| 9377 | drflac_uint64 frameCount4 = frameCount >> 2; |
| 9378 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
| 9379 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
| 9380 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 9381 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 9382 | |
| 9383 | for (i = 0; i < frameCount4; ++i) { |
| 9384 | __m128i left = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), shift0); |
| 9385 | __m128i right = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), shift1); |
| 9386 | |
| 9387 | _mm_storeu_si128((__m128i*)(pOutputSamples + i*8 + 0), _mm_unpacklo_epi32(left, right)); |
| 9388 | _mm_storeu_si128((__m128i*)(pOutputSamples + i*8 + 4), _mm_unpackhi_epi32(left, right)); |
| 9389 | } |
| 9390 | |
| 9391 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
| 9392 | pOutputSamples[i*2+0] = (drflac_int32)(pInputSamples0U32[i] << shift0); |
| 9393 | pOutputSamples[i*2+1] = (drflac_int32)(pInputSamples1U32[i] << shift1); |
| 9394 | } |
| 9395 | } |
| 9396 | #endif |
| 9397 | |
| 9398 | #if defined(DRFLAC_SUPPORT_NEON) |
| 9399 | static DRFLAC_INLINE void drflac_read_pcm_frames_s32__decode_independent_stereo__neon(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int32* pOutputSamples) |
| 9400 | { |
| 9401 | drflac_uint64 i; |
| 9402 | drflac_uint64 frameCount4 = frameCount >> 2; |
| 9403 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
| 9404 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
| 9405 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 9406 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 9407 | |
| 9408 | int32x4_t shift4_0 = vdupq_n_s32(shift0); |
| 9409 | int32x4_t shift4_1 = vdupq_n_s32(shift1); |
| 9410 | |
| 9411 | for (i = 0; i < frameCount4; ++i) { |
| 9412 | int32x4_t left; |
| 9413 | int32x4_t right; |
| 9414 | |
| 9415 | left = vreinterpretq_s32_u32(vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), shift4_0)); |
| 9416 | right = vreinterpretq_s32_u32(vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), shift4_1)); |
| 9417 | |
| 9418 | drflac__vst2q_s32(pOutputSamples + i*8, vzipq_s32(left, right)); |
| 9419 | } |
| 9420 | |
| 9421 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
| 9422 | pOutputSamples[i*2+0] = (drflac_int32)(pInputSamples0U32[i] << shift0); |
| 9423 | pOutputSamples[i*2+1] = (drflac_int32)(pInputSamples1U32[i] << shift1); |
| 9424 | } |
| 9425 | } |
| 9426 | #endif |
| 9427 | |
| 9428 | static DRFLAC_INLINE void drflac_read_pcm_frames_s32__decode_independent_stereo(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int32* pOutputSamples) |
| 9429 | { |
| 9430 | #if defined(DRFLAC_SUPPORT_SSE2) |
| 9431 | if (drflac__gIsSSE2Supported && pFlac->bitsPerSample <= 24) { |
| 9432 | drflac_read_pcm_frames_s32__decode_independent_stereo__sse2(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
| 9433 | } else |
| 9434 | #elif defined(DRFLAC_SUPPORT_NEON) |
| 9435 | if (drflac__gIsNEONSupported && pFlac->bitsPerSample <= 24) { |
| 9436 | drflac_read_pcm_frames_s32__decode_independent_stereo__neon(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
| 9437 | } else |
| 9438 | #endif |
| 9439 | { |
| 9440 | /* Scalar fallback. */ |
| 9441 | #if 0 |
| 9442 | drflac_read_pcm_frames_s32__decode_independent_stereo__reference(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
| 9443 | #else |
| 9444 | drflac_read_pcm_frames_s32__decode_independent_stereo__scalar(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
| 9445 | #endif |
| 9446 | } |
| 9447 | } |
| 9448 | |
| 9449 | |
| 9450 | DRFLAC_API drflac_uint64 drflac_read_pcm_frames_s32(drflac* pFlac, drflac_uint64 framesToRead, drflac_int32* pBufferOut) |
| 9451 | { |
| 9452 | drflac_uint64 framesRead; |
| 9453 | drflac_uint32 unusedBitsPerSample; |
| 9454 | |
| 9455 | if (pFlac == NULL || framesToRead == 0) { |
| 9456 | return 0; |
| 9457 | } |
| 9458 | |
| 9459 | if (pBufferOut == NULL) { |
| 9460 | return drflac__seek_forward_by_pcm_frames(pFlac, framesToRead); |
| 9461 | } |
| 9462 | |
| 9463 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 32); |
| 9464 | unusedBitsPerSample = 32 - pFlac->bitsPerSample; |
| 9465 | |
| 9466 | framesRead = 0; |
| 9467 | while (framesToRead > 0) { |
| 9468 | /* If we've run out of samples in this frame, go to the next. */ |
| 9469 | if (pFlac->currentFLACFrame.pcmFramesRemaining == 0) { |
| 9470 | if (!drflac__read_and_decode_next_flac_frame(pFlac)) { |
| 9471 | break; /* Couldn't read the next frame, so just break from the loop and return. */ |
| 9472 | } |
| 9473 | } else { |
| 9474 | unsigned int channelCount = drflac__get_channel_count_from_channel_assignment(pFlac->currentFLACFrame.header.channelAssignment); |
| 9475 | drflac_uint64 iFirstPCMFrame = pFlac->currentFLACFrame.header.blockSizeInPCMFrames - pFlac->currentFLACFrame.pcmFramesRemaining; |
| 9476 | drflac_uint64 frameCountThisIteration = framesToRead; |
| 9477 | |
| 9478 | if (frameCountThisIteration > pFlac->currentFLACFrame.pcmFramesRemaining) { |
| 9479 | frameCountThisIteration = pFlac->currentFLACFrame.pcmFramesRemaining; |
| 9480 | } |
| 9481 | |
| 9482 | if (channelCount == 2) { |
| 9483 | const drflac_int32* pDecodedSamples0 = pFlac->currentFLACFrame.subframes[0].pSamplesS32 + iFirstPCMFrame; |
| 9484 | const drflac_int32* pDecodedSamples1 = pFlac->currentFLACFrame.subframes[1].pSamplesS32 + iFirstPCMFrame; |
| 9485 | |
| 9486 | switch (pFlac->currentFLACFrame.header.channelAssignment) |
| 9487 | { |
| 9488 | case DRFLAC_CHANNEL_ASSIGNMENT_LEFT_SIDE: |
| 9489 | { |
| 9490 | drflac_read_pcm_frames_s32__decode_left_side(pFlac, frameCountThisIteration, unusedBitsPerSample, pDecodedSamples0, pDecodedSamples1, pBufferOut); |
| 9491 | } break; |
| 9492 | |
| 9493 | case DRFLAC_CHANNEL_ASSIGNMENT_RIGHT_SIDE: |
| 9494 | { |
| 9495 | drflac_read_pcm_frames_s32__decode_right_side(pFlac, frameCountThisIteration, unusedBitsPerSample, pDecodedSamples0, pDecodedSamples1, pBufferOut); |
| 9496 | } break; |
| 9497 | |
| 9498 | case DRFLAC_CHANNEL_ASSIGNMENT_MID_SIDE: |
| 9499 | { |
| 9500 | drflac_read_pcm_frames_s32__decode_mid_side(pFlac, frameCountThisIteration, unusedBitsPerSample, pDecodedSamples0, pDecodedSamples1, pBufferOut); |
| 9501 | } break; |
| 9502 | |
| 9503 | case DRFLAC_CHANNEL_ASSIGNMENT_INDEPENDENT: |
| 9504 | default: |
| 9505 | { |
| 9506 | drflac_read_pcm_frames_s32__decode_independent_stereo(pFlac, frameCountThisIteration, unusedBitsPerSample, pDecodedSamples0, pDecodedSamples1, pBufferOut); |
| 9507 | } break; |
| 9508 | } |
| 9509 | } else { |
| 9510 | /* Generic interleaving. */ |
| 9511 | drflac_uint64 i; |
| 9512 | for (i = 0; i < frameCountThisIteration; ++i) { |
| 9513 | unsigned int j; |
| 9514 | for (j = 0; j < channelCount; ++j) { |
| 9515 | pBufferOut[(i*channelCount)+j] = (drflac_int32)((drflac_uint32)(pFlac->currentFLACFrame.subframes[j].pSamplesS32[iFirstPCMFrame + i]) << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[j].wastedBitsPerSample)); |
| 9516 | } |
| 9517 | } |
| 9518 | } |
| 9519 | |
| 9520 | framesRead += frameCountThisIteration; |
| 9521 | pBufferOut += frameCountThisIteration * channelCount; |
| 9522 | framesToRead -= frameCountThisIteration; |
| 9523 | pFlac->currentPCMFrame += frameCountThisIteration; |
| 9524 | pFlac->currentFLACFrame.pcmFramesRemaining -= (drflac_uint32)frameCountThisIteration; |
| 9525 | } |
| 9526 | } |
| 9527 | |
| 9528 | return framesRead; |
| 9529 | } |
| 9530 | |
| 9531 | |
| 9532 | #if 0 |
| 9533 | static DRFLAC_INLINE void drflac_read_pcm_frames_s16__decode_left_side__reference(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int16* pOutputSamples) |
| 9534 | { |
| 9535 | drflac_uint64 i; |
| 9536 | for (i = 0; i < frameCount; ++i) { |
| 9537 | drflac_uint32 left = (drflac_uint32)pInputSamples0[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); |
| 9538 | drflac_uint32 side = (drflac_uint32)pInputSamples1[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); |
| 9539 | drflac_uint32 right = left - side; |
| 9540 | |
| 9541 | left >>= 16; |
| 9542 | right >>= 16; |
| 9543 | |
| 9544 | pOutputSamples[i*2+0] = (drflac_int16)left; |
| 9545 | pOutputSamples[i*2+1] = (drflac_int16)right; |
| 9546 | } |
| 9547 | } |
| 9548 | #endif |
| 9549 | |
| 9550 | static DRFLAC_INLINE void drflac_read_pcm_frames_s16__decode_left_side__scalar(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int16* pOutputSamples) |
| 9551 | { |
| 9552 | drflac_uint64 i; |
| 9553 | drflac_uint64 frameCount4 = frameCount >> 2; |
| 9554 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
| 9555 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
| 9556 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 9557 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 9558 | |
| 9559 | for (i = 0; i < frameCount4; ++i) { |
| 9560 | drflac_uint32 left0 = pInputSamples0U32[i*4+0] << shift0; |
| 9561 | drflac_uint32 left1 = pInputSamples0U32[i*4+1] << shift0; |
| 9562 | drflac_uint32 left2 = pInputSamples0U32[i*4+2] << shift0; |
| 9563 | drflac_uint32 left3 = pInputSamples0U32[i*4+3] << shift0; |
| 9564 | |
| 9565 | drflac_uint32 side0 = pInputSamples1U32[i*4+0] << shift1; |
| 9566 | drflac_uint32 side1 = pInputSamples1U32[i*4+1] << shift1; |
| 9567 | drflac_uint32 side2 = pInputSamples1U32[i*4+2] << shift1; |
| 9568 | drflac_uint32 side3 = pInputSamples1U32[i*4+3] << shift1; |
| 9569 | |
| 9570 | drflac_uint32 right0 = left0 - side0; |
| 9571 | drflac_uint32 right1 = left1 - side1; |
| 9572 | drflac_uint32 right2 = left2 - side2; |
| 9573 | drflac_uint32 right3 = left3 - side3; |
| 9574 | |
| 9575 | left0 >>= 16; |
| 9576 | left1 >>= 16; |
| 9577 | left2 >>= 16; |
| 9578 | left3 >>= 16; |
| 9579 | |
| 9580 | right0 >>= 16; |
| 9581 | right1 >>= 16; |
| 9582 | right2 >>= 16; |
| 9583 | right3 >>= 16; |
| 9584 | |
| 9585 | pOutputSamples[i*8+0] = (drflac_int16)left0; |
| 9586 | pOutputSamples[i*8+1] = (drflac_int16)right0; |
| 9587 | pOutputSamples[i*8+2] = (drflac_int16)left1; |
| 9588 | pOutputSamples[i*8+3] = (drflac_int16)right1; |
| 9589 | pOutputSamples[i*8+4] = (drflac_int16)left2; |
| 9590 | pOutputSamples[i*8+5] = (drflac_int16)right2; |
| 9591 | pOutputSamples[i*8+6] = (drflac_int16)left3; |
| 9592 | pOutputSamples[i*8+7] = (drflac_int16)right3; |
| 9593 | } |
| 9594 | |
| 9595 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
| 9596 | drflac_uint32 left = pInputSamples0U32[i] << shift0; |
| 9597 | drflac_uint32 side = pInputSamples1U32[i] << shift1; |
| 9598 | drflac_uint32 right = left - side; |
| 9599 | |
| 9600 | left >>= 16; |
| 9601 | right >>= 16; |
| 9602 | |
| 9603 | pOutputSamples[i*2+0] = (drflac_int16)left; |
| 9604 | pOutputSamples[i*2+1] = (drflac_int16)right; |
| 9605 | } |
| 9606 | } |
| 9607 | |
| 9608 | #if defined(DRFLAC_SUPPORT_SSE2) |
| 9609 | static DRFLAC_INLINE void drflac_read_pcm_frames_s16__decode_left_side__sse2(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int16* pOutputSamples) |
| 9610 | { |
| 9611 | drflac_uint64 i; |
| 9612 | drflac_uint64 frameCount4 = frameCount >> 2; |
| 9613 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
| 9614 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
| 9615 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 9616 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 9617 | |
| 9618 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
| 9619 | |
| 9620 | for (i = 0; i < frameCount4; ++i) { |
| 9621 | __m128i left = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), shift0); |
| 9622 | __m128i side = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), shift1); |
| 9623 | __m128i right = _mm_sub_epi32(left, side); |
| 9624 | |
| 9625 | left = _mm_srai_epi32(left, 16); |
| 9626 | right = _mm_srai_epi32(right, 16); |
| 9627 | |
| 9628 | _mm_storeu_si128((__m128i*)(pOutputSamples + i*8), drflac__mm_packs_interleaved_epi32(left, right)); |
| 9629 | } |
| 9630 | |
| 9631 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
| 9632 | drflac_uint32 left = pInputSamples0U32[i] << shift0; |
| 9633 | drflac_uint32 side = pInputSamples1U32[i] << shift1; |
| 9634 | drflac_uint32 right = left - side; |
| 9635 | |
| 9636 | left >>= 16; |
| 9637 | right >>= 16; |
| 9638 | |
| 9639 | pOutputSamples[i*2+0] = (drflac_int16)left; |
| 9640 | pOutputSamples[i*2+1] = (drflac_int16)right; |
| 9641 | } |
| 9642 | } |
| 9643 | #endif |
| 9644 | |
| 9645 | #if defined(DRFLAC_SUPPORT_NEON) |
| 9646 | static DRFLAC_INLINE void drflac_read_pcm_frames_s16__decode_left_side__neon(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int16* pOutputSamples) |
| 9647 | { |
| 9648 | drflac_uint64 i; |
| 9649 | drflac_uint64 frameCount4 = frameCount >> 2; |
| 9650 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
| 9651 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
| 9652 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 9653 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 9654 | int32x4_t shift0_4; |
| 9655 | int32x4_t shift1_4; |
| 9656 | |
| 9657 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
| 9658 | |
| 9659 | shift0_4 = vdupq_n_s32(shift0); |
| 9660 | shift1_4 = vdupq_n_s32(shift1); |
| 9661 | |
| 9662 | for (i = 0; i < frameCount4; ++i) { |
| 9663 | uint32x4_t left; |
| 9664 | uint32x4_t side; |
| 9665 | uint32x4_t right; |
| 9666 | |
| 9667 | left = vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), shift0_4); |
| 9668 | side = vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), shift1_4); |
| 9669 | right = vsubq_u32(left, side); |
| 9670 | |
| 9671 | left = vshrq_n_u32(left, 16); |
| 9672 | right = vshrq_n_u32(right, 16); |
| 9673 | |
| 9674 | drflac__vst2q_u16((drflac_uint16*)pOutputSamples + i*8, vzip_u16(vmovn_u32(left), vmovn_u32(right))); |
| 9675 | } |
| 9676 | |
| 9677 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
| 9678 | drflac_uint32 left = pInputSamples0U32[i] << shift0; |
| 9679 | drflac_uint32 side = pInputSamples1U32[i] << shift1; |
| 9680 | drflac_uint32 right = left - side; |
| 9681 | |
| 9682 | left >>= 16; |
| 9683 | right >>= 16; |
| 9684 | |
| 9685 | pOutputSamples[i*2+0] = (drflac_int16)left; |
| 9686 | pOutputSamples[i*2+1] = (drflac_int16)right; |
| 9687 | } |
| 9688 | } |
| 9689 | #endif |
| 9690 | |
| 9691 | static DRFLAC_INLINE void drflac_read_pcm_frames_s16__decode_left_side(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int16* pOutputSamples) |
| 9692 | { |
| 9693 | #if defined(DRFLAC_SUPPORT_SSE2) |
| 9694 | if (drflac__gIsSSE2Supported && pFlac->bitsPerSample <= 24) { |
| 9695 | drflac_read_pcm_frames_s16__decode_left_side__sse2(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
| 9696 | } else |
| 9697 | #elif defined(DRFLAC_SUPPORT_NEON) |
| 9698 | if (drflac__gIsNEONSupported && pFlac->bitsPerSample <= 24) { |
| 9699 | drflac_read_pcm_frames_s16__decode_left_side__neon(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
| 9700 | } else |
| 9701 | #endif |
| 9702 | { |
| 9703 | /* Scalar fallback. */ |
| 9704 | #if 0 |
| 9705 | drflac_read_pcm_frames_s16__decode_left_side__reference(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
| 9706 | #else |
| 9707 | drflac_read_pcm_frames_s16__decode_left_side__scalar(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
| 9708 | #endif |
| 9709 | } |
| 9710 | } |
| 9711 | |
| 9712 | |
| 9713 | #if 0 |
| 9714 | static DRFLAC_INLINE void drflac_read_pcm_frames_s16__decode_right_side__reference(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int16* pOutputSamples) |
| 9715 | { |
| 9716 | drflac_uint64 i; |
| 9717 | for (i = 0; i < frameCount; ++i) { |
| 9718 | drflac_uint32 side = (drflac_uint32)pInputSamples0[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); |
| 9719 | drflac_uint32 right = (drflac_uint32)pInputSamples1[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); |
| 9720 | drflac_uint32 left = right + side; |
| 9721 | |
| 9722 | left >>= 16; |
| 9723 | right >>= 16; |
| 9724 | |
| 9725 | pOutputSamples[i*2+0] = (drflac_int16)left; |
| 9726 | pOutputSamples[i*2+1] = (drflac_int16)right; |
| 9727 | } |
| 9728 | } |
| 9729 | #endif |
| 9730 | |
| 9731 | static DRFLAC_INLINE void drflac_read_pcm_frames_s16__decode_right_side__scalar(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int16* pOutputSamples) |
| 9732 | { |
| 9733 | drflac_uint64 i; |
| 9734 | drflac_uint64 frameCount4 = frameCount >> 2; |
| 9735 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
| 9736 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
| 9737 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 9738 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 9739 | |
| 9740 | for (i = 0; i < frameCount4; ++i) { |
| 9741 | drflac_uint32 side0 = pInputSamples0U32[i*4+0] << shift0; |
| 9742 | drflac_uint32 side1 = pInputSamples0U32[i*4+1] << shift0; |
| 9743 | drflac_uint32 side2 = pInputSamples0U32[i*4+2] << shift0; |
| 9744 | drflac_uint32 side3 = pInputSamples0U32[i*4+3] << shift0; |
| 9745 | |
| 9746 | drflac_uint32 right0 = pInputSamples1U32[i*4+0] << shift1; |
| 9747 | drflac_uint32 right1 = pInputSamples1U32[i*4+1] << shift1; |
| 9748 | drflac_uint32 right2 = pInputSamples1U32[i*4+2] << shift1; |
| 9749 | drflac_uint32 right3 = pInputSamples1U32[i*4+3] << shift1; |
| 9750 | |
| 9751 | drflac_uint32 left0 = right0 + side0; |
| 9752 | drflac_uint32 left1 = right1 + side1; |
| 9753 | drflac_uint32 left2 = right2 + side2; |
| 9754 | drflac_uint32 left3 = right3 + side3; |
| 9755 | |
| 9756 | left0 >>= 16; |
| 9757 | left1 >>= 16; |
| 9758 | left2 >>= 16; |
| 9759 | left3 >>= 16; |
| 9760 | |
| 9761 | right0 >>= 16; |
| 9762 | right1 >>= 16; |
| 9763 | right2 >>= 16; |
| 9764 | right3 >>= 16; |
| 9765 | |
| 9766 | pOutputSamples[i*8+0] = (drflac_int16)left0; |
| 9767 | pOutputSamples[i*8+1] = (drflac_int16)right0; |
| 9768 | pOutputSamples[i*8+2] = (drflac_int16)left1; |
| 9769 | pOutputSamples[i*8+3] = (drflac_int16)right1; |
| 9770 | pOutputSamples[i*8+4] = (drflac_int16)left2; |
| 9771 | pOutputSamples[i*8+5] = (drflac_int16)right2; |
| 9772 | pOutputSamples[i*8+6] = (drflac_int16)left3; |
| 9773 | pOutputSamples[i*8+7] = (drflac_int16)right3; |
| 9774 | } |
| 9775 | |
| 9776 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
| 9777 | drflac_uint32 side = pInputSamples0U32[i] << shift0; |
| 9778 | drflac_uint32 right = pInputSamples1U32[i] << shift1; |
| 9779 | drflac_uint32 left = right + side; |
| 9780 | |
| 9781 | left >>= 16; |
| 9782 | right >>= 16; |
| 9783 | |
| 9784 | pOutputSamples[i*2+0] = (drflac_int16)left; |
| 9785 | pOutputSamples[i*2+1] = (drflac_int16)right; |
| 9786 | } |
| 9787 | } |
| 9788 | |
| 9789 | #if defined(DRFLAC_SUPPORT_SSE2) |
| 9790 | static DRFLAC_INLINE void drflac_read_pcm_frames_s16__decode_right_side__sse2(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int16* pOutputSamples) |
| 9791 | { |
| 9792 | drflac_uint64 i; |
| 9793 | drflac_uint64 frameCount4 = frameCount >> 2; |
| 9794 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
| 9795 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
| 9796 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 9797 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 9798 | |
| 9799 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
| 9800 | |
| 9801 | for (i = 0; i < frameCount4; ++i) { |
| 9802 | __m128i side = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), shift0); |
| 9803 | __m128i right = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), shift1); |
| 9804 | __m128i left = _mm_add_epi32(right, side); |
| 9805 | |
| 9806 | left = _mm_srai_epi32(left, 16); |
| 9807 | right = _mm_srai_epi32(right, 16); |
| 9808 | |
| 9809 | _mm_storeu_si128((__m128i*)(pOutputSamples + i*8), drflac__mm_packs_interleaved_epi32(left, right)); |
| 9810 | } |
| 9811 | |
| 9812 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
| 9813 | drflac_uint32 side = pInputSamples0U32[i] << shift0; |
| 9814 | drflac_uint32 right = pInputSamples1U32[i] << shift1; |
| 9815 | drflac_uint32 left = right + side; |
| 9816 | |
| 9817 | left >>= 16; |
| 9818 | right >>= 16; |
| 9819 | |
| 9820 | pOutputSamples[i*2+0] = (drflac_int16)left; |
| 9821 | pOutputSamples[i*2+1] = (drflac_int16)right; |
| 9822 | } |
| 9823 | } |
| 9824 | #endif |
| 9825 | |
| 9826 | #if defined(DRFLAC_SUPPORT_NEON) |
| 9827 | static DRFLAC_INLINE void drflac_read_pcm_frames_s16__decode_right_side__neon(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int16* pOutputSamples) |
| 9828 | { |
| 9829 | drflac_uint64 i; |
| 9830 | drflac_uint64 frameCount4 = frameCount >> 2; |
| 9831 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
| 9832 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
| 9833 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 9834 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 9835 | int32x4_t shift0_4; |
| 9836 | int32x4_t shift1_4; |
| 9837 | |
| 9838 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
| 9839 | |
| 9840 | shift0_4 = vdupq_n_s32(shift0); |
| 9841 | shift1_4 = vdupq_n_s32(shift1); |
| 9842 | |
| 9843 | for (i = 0; i < frameCount4; ++i) { |
| 9844 | uint32x4_t side; |
| 9845 | uint32x4_t right; |
| 9846 | uint32x4_t left; |
| 9847 | |
| 9848 | side = vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), shift0_4); |
| 9849 | right = vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), shift1_4); |
| 9850 | left = vaddq_u32(right, side); |
| 9851 | |
| 9852 | left = vshrq_n_u32(left, 16); |
| 9853 | right = vshrq_n_u32(right, 16); |
| 9854 | |
| 9855 | drflac__vst2q_u16((drflac_uint16*)pOutputSamples + i*8, vzip_u16(vmovn_u32(left), vmovn_u32(right))); |
| 9856 | } |
| 9857 | |
| 9858 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
| 9859 | drflac_uint32 side = pInputSamples0U32[i] << shift0; |
| 9860 | drflac_uint32 right = pInputSamples1U32[i] << shift1; |
| 9861 | drflac_uint32 left = right + side; |
| 9862 | |
| 9863 | left >>= 16; |
| 9864 | right >>= 16; |
| 9865 | |
| 9866 | pOutputSamples[i*2+0] = (drflac_int16)left; |
| 9867 | pOutputSamples[i*2+1] = (drflac_int16)right; |
| 9868 | } |
| 9869 | } |
| 9870 | #endif |
| 9871 | |
| 9872 | static DRFLAC_INLINE void drflac_read_pcm_frames_s16__decode_right_side(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int16* pOutputSamples) |
| 9873 | { |
| 9874 | #if defined(DRFLAC_SUPPORT_SSE2) |
| 9875 | if (drflac__gIsSSE2Supported && pFlac->bitsPerSample <= 24) { |
| 9876 | drflac_read_pcm_frames_s16__decode_right_side__sse2(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
| 9877 | } else |
| 9878 | #elif defined(DRFLAC_SUPPORT_NEON) |
| 9879 | if (drflac__gIsNEONSupported && pFlac->bitsPerSample <= 24) { |
| 9880 | drflac_read_pcm_frames_s16__decode_right_side__neon(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
| 9881 | } else |
| 9882 | #endif |
| 9883 | { |
| 9884 | /* Scalar fallback. */ |
| 9885 | #if 0 |
| 9886 | drflac_read_pcm_frames_s16__decode_right_side__reference(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
| 9887 | #else |
| 9888 | drflac_read_pcm_frames_s16__decode_right_side__scalar(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
| 9889 | #endif |
| 9890 | } |
| 9891 | } |
| 9892 | |
| 9893 | |
| 9894 | #if 0 |
| 9895 | static DRFLAC_INLINE void drflac_read_pcm_frames_s16__decode_mid_side__reference(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int16* pOutputSamples) |
| 9896 | { |
| 9897 | for (drflac_uint64 i = 0; i < frameCount; ++i) { |
| 9898 | drflac_uint32 mid = (drflac_uint32)pInputSamples0[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 9899 | drflac_uint32 side = (drflac_uint32)pInputSamples1[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 9900 | |
| 9901 | mid = (mid << 1) | (side & 0x01); |
| 9902 | |
| 9903 | pOutputSamples[i*2+0] = (drflac_int16)(((drflac_uint32)((drflac_int32)(mid + side) >> 1) << unusedBitsPerSample) >> 16); |
| 9904 | pOutputSamples[i*2+1] = (drflac_int16)(((drflac_uint32)((drflac_int32)(mid - side) >> 1) << unusedBitsPerSample) >> 16); |
| 9905 | } |
| 9906 | } |
| 9907 | #endif |
| 9908 | |
| 9909 | static DRFLAC_INLINE void drflac_read_pcm_frames_s16__decode_mid_side__scalar(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int16* pOutputSamples) |
| 9910 | { |
| 9911 | drflac_uint64 i; |
| 9912 | drflac_uint64 frameCount4 = frameCount >> 2; |
| 9913 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
| 9914 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
| 9915 | drflac_uint32 shift = unusedBitsPerSample; |
| 9916 | |
| 9917 | if (shift > 0) { |
| 9918 | shift -= 1; |
| 9919 | for (i = 0; i < frameCount4; ++i) { |
| 9920 | drflac_uint32 temp0L; |
| 9921 | drflac_uint32 temp1L; |
| 9922 | drflac_uint32 temp2L; |
| 9923 | drflac_uint32 temp3L; |
| 9924 | drflac_uint32 temp0R; |
| 9925 | drflac_uint32 temp1R; |
| 9926 | drflac_uint32 temp2R; |
| 9927 | drflac_uint32 temp3R; |
| 9928 | |
| 9929 | drflac_uint32 mid0 = pInputSamples0U32[i*4+0] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 9930 | drflac_uint32 mid1 = pInputSamples0U32[i*4+1] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 9931 | drflac_uint32 mid2 = pInputSamples0U32[i*4+2] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 9932 | drflac_uint32 mid3 = pInputSamples0U32[i*4+3] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 9933 | |
| 9934 | drflac_uint32 side0 = pInputSamples1U32[i*4+0] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 9935 | drflac_uint32 side1 = pInputSamples1U32[i*4+1] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 9936 | drflac_uint32 side2 = pInputSamples1U32[i*4+2] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 9937 | drflac_uint32 side3 = pInputSamples1U32[i*4+3] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 9938 | |
| 9939 | mid0 = (mid0 << 1) | (side0 & 0x01); |
| 9940 | mid1 = (mid1 << 1) | (side1 & 0x01); |
| 9941 | mid2 = (mid2 << 1) | (side2 & 0x01); |
| 9942 | mid3 = (mid3 << 1) | (side3 & 0x01); |
| 9943 | |
| 9944 | temp0L = (mid0 + side0) << shift; |
| 9945 | temp1L = (mid1 + side1) << shift; |
| 9946 | temp2L = (mid2 + side2) << shift; |
| 9947 | temp3L = (mid3 + side3) << shift; |
| 9948 | |
| 9949 | temp0R = (mid0 - side0) << shift; |
| 9950 | temp1R = (mid1 - side1) << shift; |
| 9951 | temp2R = (mid2 - side2) << shift; |
| 9952 | temp3R = (mid3 - side3) << shift; |
| 9953 | |
| 9954 | temp0L >>= 16; |
| 9955 | temp1L >>= 16; |
| 9956 | temp2L >>= 16; |
| 9957 | temp3L >>= 16; |
| 9958 | |
| 9959 | temp0R >>= 16; |
| 9960 | temp1R >>= 16; |
| 9961 | temp2R >>= 16; |
| 9962 | temp3R >>= 16; |
| 9963 | |
| 9964 | pOutputSamples[i*8+0] = (drflac_int16)temp0L; |
| 9965 | pOutputSamples[i*8+1] = (drflac_int16)temp0R; |
| 9966 | pOutputSamples[i*8+2] = (drflac_int16)temp1L; |
| 9967 | pOutputSamples[i*8+3] = (drflac_int16)temp1R; |
| 9968 | pOutputSamples[i*8+4] = (drflac_int16)temp2L; |
| 9969 | pOutputSamples[i*8+5] = (drflac_int16)temp2R; |
| 9970 | pOutputSamples[i*8+6] = (drflac_int16)temp3L; |
| 9971 | pOutputSamples[i*8+7] = (drflac_int16)temp3R; |
| 9972 | } |
| 9973 | } else { |
| 9974 | for (i = 0; i < frameCount4; ++i) { |
| 9975 | drflac_uint32 temp0L; |
| 9976 | drflac_uint32 temp1L; |
| 9977 | drflac_uint32 temp2L; |
| 9978 | drflac_uint32 temp3L; |
| 9979 | drflac_uint32 temp0R; |
| 9980 | drflac_uint32 temp1R; |
| 9981 | drflac_uint32 temp2R; |
| 9982 | drflac_uint32 temp3R; |
| 9983 | |
| 9984 | drflac_uint32 mid0 = pInputSamples0U32[i*4+0] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 9985 | drflac_uint32 mid1 = pInputSamples0U32[i*4+1] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 9986 | drflac_uint32 mid2 = pInputSamples0U32[i*4+2] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 9987 | drflac_uint32 mid3 = pInputSamples0U32[i*4+3] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 9988 | |
| 9989 | drflac_uint32 side0 = pInputSamples1U32[i*4+0] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 9990 | drflac_uint32 side1 = pInputSamples1U32[i*4+1] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 9991 | drflac_uint32 side2 = pInputSamples1U32[i*4+2] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 9992 | drflac_uint32 side3 = pInputSamples1U32[i*4+3] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 9993 | |
| 9994 | mid0 = (mid0 << 1) | (side0 & 0x01); |
| 9995 | mid1 = (mid1 << 1) | (side1 & 0x01); |
| 9996 | mid2 = (mid2 << 1) | (side2 & 0x01); |
| 9997 | mid3 = (mid3 << 1) | (side3 & 0x01); |
| 9998 | |
| 9999 | temp0L = ((drflac_int32)(mid0 + side0) >> 1); |
| 10000 | temp1L = ((drflac_int32)(mid1 + side1) >> 1); |
| 10001 | temp2L = ((drflac_int32)(mid2 + side2) >> 1); |
| 10002 | temp3L = ((drflac_int32)(mid3 + side3) >> 1); |
| 10003 | |
| 10004 | temp0R = ((drflac_int32)(mid0 - side0) >> 1); |
| 10005 | temp1R = ((drflac_int32)(mid1 - side1) >> 1); |
| 10006 | temp2R = ((drflac_int32)(mid2 - side2) >> 1); |
| 10007 | temp3R = ((drflac_int32)(mid3 - side3) >> 1); |
| 10008 | |
| 10009 | temp0L >>= 16; |
| 10010 | temp1L >>= 16; |
| 10011 | temp2L >>= 16; |
| 10012 | temp3L >>= 16; |
| 10013 | |
| 10014 | temp0R >>= 16; |
| 10015 | temp1R >>= 16; |
| 10016 | temp2R >>= 16; |
| 10017 | temp3R >>= 16; |
| 10018 | |
| 10019 | pOutputSamples[i*8+0] = (drflac_int16)temp0L; |
| 10020 | pOutputSamples[i*8+1] = (drflac_int16)temp0R; |
| 10021 | pOutputSamples[i*8+2] = (drflac_int16)temp1L; |
| 10022 | pOutputSamples[i*8+3] = (drflac_int16)temp1R; |
| 10023 | pOutputSamples[i*8+4] = (drflac_int16)temp2L; |
| 10024 | pOutputSamples[i*8+5] = (drflac_int16)temp2R; |
| 10025 | pOutputSamples[i*8+6] = (drflac_int16)temp3L; |
| 10026 | pOutputSamples[i*8+7] = (drflac_int16)temp3R; |
| 10027 | } |
| 10028 | } |
| 10029 | |
| 10030 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
| 10031 | drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 10032 | drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 10033 | |
| 10034 | mid = (mid << 1) | (side & 0x01); |
| 10035 | |
| 10036 | pOutputSamples[i*2+0] = (drflac_int16)(((drflac_uint32)((drflac_int32)(mid + side) >> 1) << unusedBitsPerSample) >> 16); |
| 10037 | pOutputSamples[i*2+1] = (drflac_int16)(((drflac_uint32)((drflac_int32)(mid - side) >> 1) << unusedBitsPerSample) >> 16); |
| 10038 | } |
| 10039 | } |
| 10040 | |
| 10041 | #if defined(DRFLAC_SUPPORT_SSE2) |
| 10042 | static DRFLAC_INLINE void drflac_read_pcm_frames_s16__decode_mid_side__sse2(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int16* pOutputSamples) |
| 10043 | { |
| 10044 | drflac_uint64 i; |
| 10045 | drflac_uint64 frameCount4 = frameCount >> 2; |
| 10046 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
| 10047 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
| 10048 | drflac_uint32 shift = unusedBitsPerSample; |
| 10049 | |
| 10050 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
| 10051 | |
| 10052 | if (shift == 0) { |
| 10053 | for (i = 0; i < frameCount4; ++i) { |
| 10054 | __m128i mid; |
| 10055 | __m128i side; |
| 10056 | __m128i left; |
| 10057 | __m128i right; |
| 10058 | |
| 10059 | mid = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); |
| 10060 | side = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); |
| 10061 | |
| 10062 | mid = _mm_or_si128(_mm_slli_epi32(mid, 1), _mm_and_si128(side, _mm_set1_epi32(0x01))); |
| 10063 | |
| 10064 | left = _mm_srai_epi32(_mm_add_epi32(mid, side), 1); |
| 10065 | right = _mm_srai_epi32(_mm_sub_epi32(mid, side), 1); |
| 10066 | |
| 10067 | left = _mm_srai_epi32(left, 16); |
| 10068 | right = _mm_srai_epi32(right, 16); |
| 10069 | |
| 10070 | _mm_storeu_si128((__m128i*)(pOutputSamples + i*8), drflac__mm_packs_interleaved_epi32(left, right)); |
| 10071 | } |
| 10072 | |
| 10073 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
| 10074 | drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 10075 | drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 10076 | |
| 10077 | mid = (mid << 1) | (side & 0x01); |
| 10078 | |
| 10079 | pOutputSamples[i*2+0] = (drflac_int16)(((drflac_int32)(mid + side) >> 1) >> 16); |
| 10080 | pOutputSamples[i*2+1] = (drflac_int16)(((drflac_int32)(mid - side) >> 1) >> 16); |
| 10081 | } |
| 10082 | } else { |
| 10083 | shift -= 1; |
| 10084 | for (i = 0; i < frameCount4; ++i) { |
| 10085 | __m128i mid; |
| 10086 | __m128i side; |
| 10087 | __m128i left; |
| 10088 | __m128i right; |
| 10089 | |
| 10090 | mid = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); |
| 10091 | side = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); |
| 10092 | |
| 10093 | mid = _mm_or_si128(_mm_slli_epi32(mid, 1), _mm_and_si128(side, _mm_set1_epi32(0x01))); |
| 10094 | |
| 10095 | left = _mm_slli_epi32(_mm_add_epi32(mid, side), shift); |
| 10096 | right = _mm_slli_epi32(_mm_sub_epi32(mid, side), shift); |
| 10097 | |
| 10098 | left = _mm_srai_epi32(left, 16); |
| 10099 | right = _mm_srai_epi32(right, 16); |
| 10100 | |
| 10101 | _mm_storeu_si128((__m128i*)(pOutputSamples + i*8), drflac__mm_packs_interleaved_epi32(left, right)); |
| 10102 | } |
| 10103 | |
| 10104 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
| 10105 | drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 10106 | drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 10107 | |
| 10108 | mid = (mid << 1) | (side & 0x01); |
| 10109 | |
| 10110 | pOutputSamples[i*2+0] = (drflac_int16)(((mid + side) << shift) >> 16); |
| 10111 | pOutputSamples[i*2+1] = (drflac_int16)(((mid - side) << shift) >> 16); |
| 10112 | } |
| 10113 | } |
| 10114 | } |
| 10115 | #endif |
| 10116 | |
| 10117 | #if defined(DRFLAC_SUPPORT_NEON) |
| 10118 | static DRFLAC_INLINE void drflac_read_pcm_frames_s16__decode_mid_side__neon(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int16* pOutputSamples) |
| 10119 | { |
| 10120 | drflac_uint64 i; |
| 10121 | drflac_uint64 frameCount4 = frameCount >> 2; |
| 10122 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
| 10123 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
| 10124 | drflac_uint32 shift = unusedBitsPerSample; |
| 10125 | int32x4_t wbpsShift0_4; /* wbps = Wasted Bits Per Sample */ |
| 10126 | int32x4_t wbpsShift1_4; /* wbps = Wasted Bits Per Sample */ |
| 10127 | |
| 10128 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
| 10129 | |
| 10130 | wbpsShift0_4 = vdupq_n_s32(pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); |
| 10131 | wbpsShift1_4 = vdupq_n_s32(pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); |
| 10132 | |
| 10133 | if (shift == 0) { |
| 10134 | for (i = 0; i < frameCount4; ++i) { |
| 10135 | uint32x4_t mid; |
| 10136 | uint32x4_t side; |
| 10137 | int32x4_t left; |
| 10138 | int32x4_t right; |
| 10139 | |
| 10140 | mid = vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), wbpsShift0_4); |
| 10141 | side = vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), wbpsShift1_4); |
| 10142 | |
| 10143 | mid = vorrq_u32(vshlq_n_u32(mid, 1), vandq_u32(side, vdupq_n_u32(1))); |
| 10144 | |
| 10145 | left = vshrq_n_s32(vreinterpretq_s32_u32(vaddq_u32(mid, side)), 1); |
| 10146 | right = vshrq_n_s32(vreinterpretq_s32_u32(vsubq_u32(mid, side)), 1); |
| 10147 | |
| 10148 | left = vshrq_n_s32(left, 16); |
| 10149 | right = vshrq_n_s32(right, 16); |
| 10150 | |
| 10151 | drflac__vst2q_s16(pOutputSamples + i*8, vzip_s16(vmovn_s32(left), vmovn_s32(right))); |
| 10152 | } |
| 10153 | |
| 10154 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
| 10155 | drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 10156 | drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 10157 | |
| 10158 | mid = (mid << 1) | (side & 0x01); |
| 10159 | |
| 10160 | pOutputSamples[i*2+0] = (drflac_int16)(((drflac_int32)(mid + side) >> 1) >> 16); |
| 10161 | pOutputSamples[i*2+1] = (drflac_int16)(((drflac_int32)(mid - side) >> 1) >> 16); |
| 10162 | } |
| 10163 | } else { |
| 10164 | int32x4_t shift4; |
| 10165 | |
| 10166 | shift -= 1; |
| 10167 | shift4 = vdupq_n_s32(shift); |
| 10168 | |
| 10169 | for (i = 0; i < frameCount4; ++i) { |
| 10170 | uint32x4_t mid; |
| 10171 | uint32x4_t side; |
| 10172 | int32x4_t left; |
| 10173 | int32x4_t right; |
| 10174 | |
| 10175 | mid = vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), wbpsShift0_4); |
| 10176 | side = vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), wbpsShift1_4); |
| 10177 | |
| 10178 | mid = vorrq_u32(vshlq_n_u32(mid, 1), vandq_u32(side, vdupq_n_u32(1))); |
| 10179 | |
| 10180 | left = vreinterpretq_s32_u32(vshlq_u32(vaddq_u32(mid, side), shift4)); |
| 10181 | right = vreinterpretq_s32_u32(vshlq_u32(vsubq_u32(mid, side), shift4)); |
| 10182 | |
| 10183 | left = vshrq_n_s32(left, 16); |
| 10184 | right = vshrq_n_s32(right, 16); |
| 10185 | |
| 10186 | drflac__vst2q_s16(pOutputSamples + i*8, vzip_s16(vmovn_s32(left), vmovn_s32(right))); |
| 10187 | } |
| 10188 | |
| 10189 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
| 10190 | drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 10191 | drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 10192 | |
| 10193 | mid = (mid << 1) | (side & 0x01); |
| 10194 | |
| 10195 | pOutputSamples[i*2+0] = (drflac_int16)(((mid + side) << shift) >> 16); |
| 10196 | pOutputSamples[i*2+1] = (drflac_int16)(((mid - side) << shift) >> 16); |
| 10197 | } |
| 10198 | } |
| 10199 | } |
| 10200 | #endif |
| 10201 | |
| 10202 | static DRFLAC_INLINE void drflac_read_pcm_frames_s16__decode_mid_side(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int16* pOutputSamples) |
| 10203 | { |
| 10204 | #if defined(DRFLAC_SUPPORT_SSE2) |
| 10205 | if (drflac__gIsSSE2Supported && pFlac->bitsPerSample <= 24) { |
| 10206 | drflac_read_pcm_frames_s16__decode_mid_side__sse2(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
| 10207 | } else |
| 10208 | #elif defined(DRFLAC_SUPPORT_NEON) |
| 10209 | if (drflac__gIsNEONSupported && pFlac->bitsPerSample <= 24) { |
| 10210 | drflac_read_pcm_frames_s16__decode_mid_side__neon(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
| 10211 | } else |
| 10212 | #endif |
| 10213 | { |
| 10214 | /* Scalar fallback. */ |
| 10215 | #if 0 |
| 10216 | drflac_read_pcm_frames_s16__decode_mid_side__reference(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
| 10217 | #else |
| 10218 | drflac_read_pcm_frames_s16__decode_mid_side__scalar(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
| 10219 | #endif |
| 10220 | } |
| 10221 | } |
| 10222 | |
| 10223 | |
| 10224 | #if 0 |
| 10225 | static DRFLAC_INLINE void drflac_read_pcm_frames_s16__decode_independent_stereo__reference(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int16* pOutputSamples) |
| 10226 | { |
| 10227 | for (drflac_uint64 i = 0; i < frameCount; ++i) { |
| 10228 | pOutputSamples[i*2+0] = (drflac_int16)((drflac_int32)((drflac_uint32)pInputSamples0[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample)) >> 16); |
| 10229 | pOutputSamples[i*2+1] = (drflac_int16)((drflac_int32)((drflac_uint32)pInputSamples1[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample)) >> 16); |
| 10230 | } |
| 10231 | } |
| 10232 | #endif |
| 10233 | |
| 10234 | static DRFLAC_INLINE void drflac_read_pcm_frames_s16__decode_independent_stereo__scalar(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int16* pOutputSamples) |
| 10235 | { |
| 10236 | drflac_uint64 i; |
| 10237 | drflac_uint64 frameCount4 = frameCount >> 2; |
| 10238 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
| 10239 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
| 10240 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 10241 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 10242 | |
| 10243 | for (i = 0; i < frameCount4; ++i) { |
| 10244 | drflac_uint32 tempL0 = pInputSamples0U32[i*4+0] << shift0; |
| 10245 | drflac_uint32 tempL1 = pInputSamples0U32[i*4+1] << shift0; |
| 10246 | drflac_uint32 tempL2 = pInputSamples0U32[i*4+2] << shift0; |
| 10247 | drflac_uint32 tempL3 = pInputSamples0U32[i*4+3] << shift0; |
| 10248 | |
| 10249 | drflac_uint32 tempR0 = pInputSamples1U32[i*4+0] << shift1; |
| 10250 | drflac_uint32 tempR1 = pInputSamples1U32[i*4+1] << shift1; |
| 10251 | drflac_uint32 tempR2 = pInputSamples1U32[i*4+2] << shift1; |
| 10252 | drflac_uint32 tempR3 = pInputSamples1U32[i*4+3] << shift1; |
| 10253 | |
| 10254 | tempL0 >>= 16; |
| 10255 | tempL1 >>= 16; |
| 10256 | tempL2 >>= 16; |
| 10257 | tempL3 >>= 16; |
| 10258 | |
| 10259 | tempR0 >>= 16; |
| 10260 | tempR1 >>= 16; |
| 10261 | tempR2 >>= 16; |
| 10262 | tempR3 >>= 16; |
| 10263 | |
| 10264 | pOutputSamples[i*8+0] = (drflac_int16)tempL0; |
| 10265 | pOutputSamples[i*8+1] = (drflac_int16)tempR0; |
| 10266 | pOutputSamples[i*8+2] = (drflac_int16)tempL1; |
| 10267 | pOutputSamples[i*8+3] = (drflac_int16)tempR1; |
| 10268 | pOutputSamples[i*8+4] = (drflac_int16)tempL2; |
| 10269 | pOutputSamples[i*8+5] = (drflac_int16)tempR2; |
| 10270 | pOutputSamples[i*8+6] = (drflac_int16)tempL3; |
| 10271 | pOutputSamples[i*8+7] = (drflac_int16)tempR3; |
| 10272 | } |
| 10273 | |
| 10274 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
| 10275 | pOutputSamples[i*2+0] = (drflac_int16)((pInputSamples0U32[i] << shift0) >> 16); |
| 10276 | pOutputSamples[i*2+1] = (drflac_int16)((pInputSamples1U32[i] << shift1) >> 16); |
| 10277 | } |
| 10278 | } |
| 10279 | |
| 10280 | #if defined(DRFLAC_SUPPORT_SSE2) |
| 10281 | static DRFLAC_INLINE void drflac_read_pcm_frames_s16__decode_independent_stereo__sse2(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int16* pOutputSamples) |
| 10282 | { |
| 10283 | drflac_uint64 i; |
| 10284 | drflac_uint64 frameCount4 = frameCount >> 2; |
| 10285 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
| 10286 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
| 10287 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 10288 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 10289 | |
| 10290 | for (i = 0; i < frameCount4; ++i) { |
| 10291 | __m128i left = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), shift0); |
| 10292 | __m128i right = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), shift1); |
| 10293 | |
| 10294 | left = _mm_srai_epi32(left, 16); |
| 10295 | right = _mm_srai_epi32(right, 16); |
| 10296 | |
| 10297 | /* At this point we have results. We can now pack and interleave these into a single __m128i object and then store the in the output buffer. */ |
| 10298 | _mm_storeu_si128((__m128i*)(pOutputSamples + i*8), drflac__mm_packs_interleaved_epi32(left, right)); |
| 10299 | } |
| 10300 | |
| 10301 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
| 10302 | pOutputSamples[i*2+0] = (drflac_int16)((pInputSamples0U32[i] << shift0) >> 16); |
| 10303 | pOutputSamples[i*2+1] = (drflac_int16)((pInputSamples1U32[i] << shift1) >> 16); |
| 10304 | } |
| 10305 | } |
| 10306 | #endif |
| 10307 | |
| 10308 | #if defined(DRFLAC_SUPPORT_NEON) |
| 10309 | static DRFLAC_INLINE void drflac_read_pcm_frames_s16__decode_independent_stereo__neon(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int16* pOutputSamples) |
| 10310 | { |
| 10311 | drflac_uint64 i; |
| 10312 | drflac_uint64 frameCount4 = frameCount >> 2; |
| 10313 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
| 10314 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
| 10315 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 10316 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 10317 | |
| 10318 | int32x4_t shift0_4 = vdupq_n_s32(shift0); |
| 10319 | int32x4_t shift1_4 = vdupq_n_s32(shift1); |
| 10320 | |
| 10321 | for (i = 0; i < frameCount4; ++i) { |
| 10322 | int32x4_t left; |
| 10323 | int32x4_t right; |
| 10324 | |
| 10325 | left = vreinterpretq_s32_u32(vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), shift0_4)); |
| 10326 | right = vreinterpretq_s32_u32(vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), shift1_4)); |
| 10327 | |
| 10328 | left = vshrq_n_s32(left, 16); |
| 10329 | right = vshrq_n_s32(right, 16); |
| 10330 | |
| 10331 | drflac__vst2q_s16(pOutputSamples + i*8, vzip_s16(vmovn_s32(left), vmovn_s32(right))); |
| 10332 | } |
| 10333 | |
| 10334 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
| 10335 | pOutputSamples[i*2+0] = (drflac_int16)((pInputSamples0U32[i] << shift0) >> 16); |
| 10336 | pOutputSamples[i*2+1] = (drflac_int16)((pInputSamples1U32[i] << shift1) >> 16); |
| 10337 | } |
| 10338 | } |
| 10339 | #endif |
| 10340 | |
| 10341 | static DRFLAC_INLINE void drflac_read_pcm_frames_s16__decode_independent_stereo(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int16* pOutputSamples) |
| 10342 | { |
| 10343 | #if defined(DRFLAC_SUPPORT_SSE2) |
| 10344 | if (drflac__gIsSSE2Supported && pFlac->bitsPerSample <= 24) { |
| 10345 | drflac_read_pcm_frames_s16__decode_independent_stereo__sse2(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
| 10346 | } else |
| 10347 | #elif defined(DRFLAC_SUPPORT_NEON) |
| 10348 | if (drflac__gIsNEONSupported && pFlac->bitsPerSample <= 24) { |
| 10349 | drflac_read_pcm_frames_s16__decode_independent_stereo__neon(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
| 10350 | } else |
| 10351 | #endif |
| 10352 | { |
| 10353 | /* Scalar fallback. */ |
| 10354 | #if 0 |
| 10355 | drflac_read_pcm_frames_s16__decode_independent_stereo__reference(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
| 10356 | #else |
| 10357 | drflac_read_pcm_frames_s16__decode_independent_stereo__scalar(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
| 10358 | #endif |
| 10359 | } |
| 10360 | } |
| 10361 | |
| 10362 | DRFLAC_API drflac_uint64 drflac_read_pcm_frames_s16(drflac* pFlac, drflac_uint64 framesToRead, drflac_int16* pBufferOut) |
| 10363 | { |
| 10364 | drflac_uint64 framesRead; |
| 10365 | drflac_uint32 unusedBitsPerSample; |
| 10366 | |
| 10367 | if (pFlac == NULL || framesToRead == 0) { |
| 10368 | return 0; |
| 10369 | } |
| 10370 | |
| 10371 | if (pBufferOut == NULL) { |
| 10372 | return drflac__seek_forward_by_pcm_frames(pFlac, framesToRead); |
| 10373 | } |
| 10374 | |
| 10375 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 32); |
| 10376 | unusedBitsPerSample = 32 - pFlac->bitsPerSample; |
| 10377 | |
| 10378 | framesRead = 0; |
| 10379 | while (framesToRead > 0) { |
| 10380 | /* If we've run out of samples in this frame, go to the next. */ |
| 10381 | if (pFlac->currentFLACFrame.pcmFramesRemaining == 0) { |
| 10382 | if (!drflac__read_and_decode_next_flac_frame(pFlac)) { |
| 10383 | break; /* Couldn't read the next frame, so just break from the loop and return. */ |
| 10384 | } |
| 10385 | } else { |
| 10386 | unsigned int channelCount = drflac__get_channel_count_from_channel_assignment(pFlac->currentFLACFrame.header.channelAssignment); |
| 10387 | drflac_uint64 iFirstPCMFrame = pFlac->currentFLACFrame.header.blockSizeInPCMFrames - pFlac->currentFLACFrame.pcmFramesRemaining; |
| 10388 | drflac_uint64 frameCountThisIteration = framesToRead; |
| 10389 | |
| 10390 | if (frameCountThisIteration > pFlac->currentFLACFrame.pcmFramesRemaining) { |
| 10391 | frameCountThisIteration = pFlac->currentFLACFrame.pcmFramesRemaining; |
| 10392 | } |
| 10393 | |
| 10394 | if (channelCount == 2) { |
| 10395 | const drflac_int32* pDecodedSamples0 = pFlac->currentFLACFrame.subframes[0].pSamplesS32 + iFirstPCMFrame; |
| 10396 | const drflac_int32* pDecodedSamples1 = pFlac->currentFLACFrame.subframes[1].pSamplesS32 + iFirstPCMFrame; |
| 10397 | |
| 10398 | switch (pFlac->currentFLACFrame.header.channelAssignment) |
| 10399 | { |
| 10400 | case DRFLAC_CHANNEL_ASSIGNMENT_LEFT_SIDE: |
| 10401 | { |
| 10402 | drflac_read_pcm_frames_s16__decode_left_side(pFlac, frameCountThisIteration, unusedBitsPerSample, pDecodedSamples0, pDecodedSamples1, pBufferOut); |
| 10403 | } break; |
| 10404 | |
| 10405 | case DRFLAC_CHANNEL_ASSIGNMENT_RIGHT_SIDE: |
| 10406 | { |
| 10407 | drflac_read_pcm_frames_s16__decode_right_side(pFlac, frameCountThisIteration, unusedBitsPerSample, pDecodedSamples0, pDecodedSamples1, pBufferOut); |
| 10408 | } break; |
| 10409 | |
| 10410 | case DRFLAC_CHANNEL_ASSIGNMENT_MID_SIDE: |
| 10411 | { |
| 10412 | drflac_read_pcm_frames_s16__decode_mid_side(pFlac, frameCountThisIteration, unusedBitsPerSample, pDecodedSamples0, pDecodedSamples1, pBufferOut); |
| 10413 | } break; |
| 10414 | |
| 10415 | case DRFLAC_CHANNEL_ASSIGNMENT_INDEPENDENT: |
| 10416 | default: |
| 10417 | { |
| 10418 | drflac_read_pcm_frames_s16__decode_independent_stereo(pFlac, frameCountThisIteration, unusedBitsPerSample, pDecodedSamples0, pDecodedSamples1, pBufferOut); |
| 10419 | } break; |
| 10420 | } |
| 10421 | } else { |
| 10422 | /* Generic interleaving. */ |
| 10423 | drflac_uint64 i; |
| 10424 | for (i = 0; i < frameCountThisIteration; ++i) { |
| 10425 | unsigned int j; |
| 10426 | for (j = 0; j < channelCount; ++j) { |
| 10427 | drflac_int32 sampleS32 = (drflac_int32)((drflac_uint32)(pFlac->currentFLACFrame.subframes[j].pSamplesS32[iFirstPCMFrame + i]) << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[j].wastedBitsPerSample)); |
| 10428 | pBufferOut[(i*channelCount)+j] = (drflac_int16)(sampleS32 >> 16); |
| 10429 | } |
| 10430 | } |
| 10431 | } |
| 10432 | |
| 10433 | framesRead += frameCountThisIteration; |
| 10434 | pBufferOut += frameCountThisIteration * channelCount; |
| 10435 | framesToRead -= frameCountThisIteration; |
| 10436 | pFlac->currentPCMFrame += frameCountThisIteration; |
| 10437 | pFlac->currentFLACFrame.pcmFramesRemaining -= (drflac_uint32)frameCountThisIteration; |
| 10438 | } |
| 10439 | } |
| 10440 | |
| 10441 | return framesRead; |
| 10442 | } |
| 10443 | |
| 10444 | |
| 10445 | #if 0 |
| 10446 | static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_left_side__reference(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) |
| 10447 | { |
| 10448 | drflac_uint64 i; |
| 10449 | for (i = 0; i < frameCount; ++i) { |
| 10450 | drflac_uint32 left = (drflac_uint32)pInputSamples0[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); |
| 10451 | drflac_uint32 side = (drflac_uint32)pInputSamples1[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); |
| 10452 | drflac_uint32 right = left - side; |
| 10453 | |
| 10454 | pOutputSamples[i*2+0] = (float)((drflac_int32)left / 2147483648.0); |
| 10455 | pOutputSamples[i*2+1] = (float)((drflac_int32)right / 2147483648.0); |
| 10456 | } |
| 10457 | } |
| 10458 | #endif |
| 10459 | |
| 10460 | static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_left_side__scalar(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) |
| 10461 | { |
| 10462 | drflac_uint64 i; |
| 10463 | drflac_uint64 frameCount4 = frameCount >> 2; |
| 10464 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
| 10465 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
| 10466 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 10467 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 10468 | |
| 10469 | float factor = 1 / 2147483648.0; |
| 10470 | |
| 10471 | for (i = 0; i < frameCount4; ++i) { |
| 10472 | drflac_uint32 left0 = pInputSamples0U32[i*4+0] << shift0; |
| 10473 | drflac_uint32 left1 = pInputSamples0U32[i*4+1] << shift0; |
| 10474 | drflac_uint32 left2 = pInputSamples0U32[i*4+2] << shift0; |
| 10475 | drflac_uint32 left3 = pInputSamples0U32[i*4+3] << shift0; |
| 10476 | |
| 10477 | drflac_uint32 side0 = pInputSamples1U32[i*4+0] << shift1; |
| 10478 | drflac_uint32 side1 = pInputSamples1U32[i*4+1] << shift1; |
| 10479 | drflac_uint32 side2 = pInputSamples1U32[i*4+2] << shift1; |
| 10480 | drflac_uint32 side3 = pInputSamples1U32[i*4+3] << shift1; |
| 10481 | |
| 10482 | drflac_uint32 right0 = left0 - side0; |
| 10483 | drflac_uint32 right1 = left1 - side1; |
| 10484 | drflac_uint32 right2 = left2 - side2; |
| 10485 | drflac_uint32 right3 = left3 - side3; |
| 10486 | |
| 10487 | pOutputSamples[i*8+0] = (drflac_int32)left0 * factor; |
| 10488 | pOutputSamples[i*8+1] = (drflac_int32)right0 * factor; |
| 10489 | pOutputSamples[i*8+2] = (drflac_int32)left1 * factor; |
| 10490 | pOutputSamples[i*8+3] = (drflac_int32)right1 * factor; |
| 10491 | pOutputSamples[i*8+4] = (drflac_int32)left2 * factor; |
| 10492 | pOutputSamples[i*8+5] = (drflac_int32)right2 * factor; |
| 10493 | pOutputSamples[i*8+6] = (drflac_int32)left3 * factor; |
| 10494 | pOutputSamples[i*8+7] = (drflac_int32)right3 * factor; |
| 10495 | } |
| 10496 | |
| 10497 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
| 10498 | drflac_uint32 left = pInputSamples0U32[i] << shift0; |
| 10499 | drflac_uint32 side = pInputSamples1U32[i] << shift1; |
| 10500 | drflac_uint32 right = left - side; |
| 10501 | |
| 10502 | pOutputSamples[i*2+0] = (drflac_int32)left * factor; |
| 10503 | pOutputSamples[i*2+1] = (drflac_int32)right * factor; |
| 10504 | } |
| 10505 | } |
| 10506 | |
| 10507 | #if defined(DRFLAC_SUPPORT_SSE2) |
| 10508 | static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_left_side__sse2(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) |
| 10509 | { |
| 10510 | drflac_uint64 i; |
| 10511 | drflac_uint64 frameCount4 = frameCount >> 2; |
| 10512 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
| 10513 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
| 10514 | drflac_uint32 shift0 = (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample) - 8; |
| 10515 | drflac_uint32 shift1 = (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample) - 8; |
| 10516 | __m128 factor; |
| 10517 | |
| 10518 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
| 10519 | |
| 10520 | factor = _mm_set1_ps(1.0f / 8388608.0f); |
| 10521 | |
| 10522 | for (i = 0; i < frameCount4; ++i) { |
| 10523 | __m128i left = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), shift0); |
| 10524 | __m128i side = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), shift1); |
| 10525 | __m128i right = _mm_sub_epi32(left, side); |
| 10526 | __m128 leftf = _mm_mul_ps(_mm_cvtepi32_ps(left), factor); |
| 10527 | __m128 rightf = _mm_mul_ps(_mm_cvtepi32_ps(right), factor); |
| 10528 | |
| 10529 | _mm_storeu_ps(pOutputSamples + i*8 + 0, _mm_unpacklo_ps(leftf, rightf)); |
| 10530 | _mm_storeu_ps(pOutputSamples + i*8 + 4, _mm_unpackhi_ps(leftf, rightf)); |
| 10531 | } |
| 10532 | |
| 10533 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
| 10534 | drflac_uint32 left = pInputSamples0U32[i] << shift0; |
| 10535 | drflac_uint32 side = pInputSamples1U32[i] << shift1; |
| 10536 | drflac_uint32 right = left - side; |
| 10537 | |
| 10538 | pOutputSamples[i*2+0] = (drflac_int32)left / 8388608.0f; |
| 10539 | pOutputSamples[i*2+1] = (drflac_int32)right / 8388608.0f; |
| 10540 | } |
| 10541 | } |
| 10542 | #endif |
| 10543 | |
| 10544 | #if defined(DRFLAC_SUPPORT_NEON) |
| 10545 | static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_left_side__neon(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) |
| 10546 | { |
| 10547 | drflac_uint64 i; |
| 10548 | drflac_uint64 frameCount4 = frameCount >> 2; |
| 10549 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
| 10550 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
| 10551 | drflac_uint32 shift0 = (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample) - 8; |
| 10552 | drflac_uint32 shift1 = (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample) - 8; |
| 10553 | float32x4_t factor4; |
| 10554 | int32x4_t shift0_4; |
| 10555 | int32x4_t shift1_4; |
| 10556 | |
| 10557 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
| 10558 | |
| 10559 | factor4 = vdupq_n_f32(1.0f / 8388608.0f); |
| 10560 | shift0_4 = vdupq_n_s32(shift0); |
| 10561 | shift1_4 = vdupq_n_s32(shift1); |
| 10562 | |
| 10563 | for (i = 0; i < frameCount4; ++i) { |
| 10564 | uint32x4_t left; |
| 10565 | uint32x4_t side; |
| 10566 | uint32x4_t right; |
| 10567 | float32x4_t leftf; |
| 10568 | float32x4_t rightf; |
| 10569 | |
| 10570 | left = vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), shift0_4); |
| 10571 | side = vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), shift1_4); |
| 10572 | right = vsubq_u32(left, side); |
| 10573 | leftf = vmulq_f32(vcvtq_f32_s32(vreinterpretq_s32_u32(left)), factor4); |
| 10574 | rightf = vmulq_f32(vcvtq_f32_s32(vreinterpretq_s32_u32(right)), factor4); |
| 10575 | |
| 10576 | drflac__vst2q_f32(pOutputSamples + i*8, vzipq_f32(leftf, rightf)); |
| 10577 | } |
| 10578 | |
| 10579 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
| 10580 | drflac_uint32 left = pInputSamples0U32[i] << shift0; |
| 10581 | drflac_uint32 side = pInputSamples1U32[i] << shift1; |
| 10582 | drflac_uint32 right = left - side; |
| 10583 | |
| 10584 | pOutputSamples[i*2+0] = (drflac_int32)left / 8388608.0f; |
| 10585 | pOutputSamples[i*2+1] = (drflac_int32)right / 8388608.0f; |
| 10586 | } |
| 10587 | } |
| 10588 | #endif |
| 10589 | |
| 10590 | static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_left_side(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) |
| 10591 | { |
| 10592 | #if defined(DRFLAC_SUPPORT_SSE2) |
| 10593 | if (drflac__gIsSSE2Supported && pFlac->bitsPerSample <= 24) { |
| 10594 | drflac_read_pcm_frames_f32__decode_left_side__sse2(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
| 10595 | } else |
| 10596 | #elif defined(DRFLAC_SUPPORT_NEON) |
| 10597 | if (drflac__gIsNEONSupported && pFlac->bitsPerSample <= 24) { |
| 10598 | drflac_read_pcm_frames_f32__decode_left_side__neon(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
| 10599 | } else |
| 10600 | #endif |
| 10601 | { |
| 10602 | /* Scalar fallback. */ |
| 10603 | #if 0 |
| 10604 | drflac_read_pcm_frames_f32__decode_left_side__reference(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
| 10605 | #else |
| 10606 | drflac_read_pcm_frames_f32__decode_left_side__scalar(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
| 10607 | #endif |
| 10608 | } |
| 10609 | } |
| 10610 | |
| 10611 | |
| 10612 | #if 0 |
| 10613 | static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_right_side__reference(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) |
| 10614 | { |
| 10615 | drflac_uint64 i; |
| 10616 | for (i = 0; i < frameCount; ++i) { |
| 10617 | drflac_uint32 side = (drflac_uint32)pInputSamples0[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); |
| 10618 | drflac_uint32 right = (drflac_uint32)pInputSamples1[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); |
| 10619 | drflac_uint32 left = right + side; |
| 10620 | |
| 10621 | pOutputSamples[i*2+0] = (float)((drflac_int32)left / 2147483648.0); |
| 10622 | pOutputSamples[i*2+1] = (float)((drflac_int32)right / 2147483648.0); |
| 10623 | } |
| 10624 | } |
| 10625 | #endif |
| 10626 | |
| 10627 | static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_right_side__scalar(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) |
| 10628 | { |
| 10629 | drflac_uint64 i; |
| 10630 | drflac_uint64 frameCount4 = frameCount >> 2; |
| 10631 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
| 10632 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
| 10633 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 10634 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 10635 | float factor = 1 / 2147483648.0; |
| 10636 | |
| 10637 | for (i = 0; i < frameCount4; ++i) { |
| 10638 | drflac_uint32 side0 = pInputSamples0U32[i*4+0] << shift0; |
| 10639 | drflac_uint32 side1 = pInputSamples0U32[i*4+1] << shift0; |
| 10640 | drflac_uint32 side2 = pInputSamples0U32[i*4+2] << shift0; |
| 10641 | drflac_uint32 side3 = pInputSamples0U32[i*4+3] << shift0; |
| 10642 | |
| 10643 | drflac_uint32 right0 = pInputSamples1U32[i*4+0] << shift1; |
| 10644 | drflac_uint32 right1 = pInputSamples1U32[i*4+1] << shift1; |
| 10645 | drflac_uint32 right2 = pInputSamples1U32[i*4+2] << shift1; |
| 10646 | drflac_uint32 right3 = pInputSamples1U32[i*4+3] << shift1; |
| 10647 | |
| 10648 | drflac_uint32 left0 = right0 + side0; |
| 10649 | drflac_uint32 left1 = right1 + side1; |
| 10650 | drflac_uint32 left2 = right2 + side2; |
| 10651 | drflac_uint32 left3 = right3 + side3; |
| 10652 | |
| 10653 | pOutputSamples[i*8+0] = (drflac_int32)left0 * factor; |
| 10654 | pOutputSamples[i*8+1] = (drflac_int32)right0 * factor; |
| 10655 | pOutputSamples[i*8+2] = (drflac_int32)left1 * factor; |
| 10656 | pOutputSamples[i*8+3] = (drflac_int32)right1 * factor; |
| 10657 | pOutputSamples[i*8+4] = (drflac_int32)left2 * factor; |
| 10658 | pOutputSamples[i*8+5] = (drflac_int32)right2 * factor; |
| 10659 | pOutputSamples[i*8+6] = (drflac_int32)left3 * factor; |
| 10660 | pOutputSamples[i*8+7] = (drflac_int32)right3 * factor; |
| 10661 | } |
| 10662 | |
| 10663 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
| 10664 | drflac_uint32 side = pInputSamples0U32[i] << shift0; |
| 10665 | drflac_uint32 right = pInputSamples1U32[i] << shift1; |
| 10666 | drflac_uint32 left = right + side; |
| 10667 | |
| 10668 | pOutputSamples[i*2+0] = (drflac_int32)left * factor; |
| 10669 | pOutputSamples[i*2+1] = (drflac_int32)right * factor; |
| 10670 | } |
| 10671 | } |
| 10672 | |
| 10673 | #if defined(DRFLAC_SUPPORT_SSE2) |
| 10674 | static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_right_side__sse2(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) |
| 10675 | { |
| 10676 | drflac_uint64 i; |
| 10677 | drflac_uint64 frameCount4 = frameCount >> 2; |
| 10678 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
| 10679 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
| 10680 | drflac_uint32 shift0 = (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample) - 8; |
| 10681 | drflac_uint32 shift1 = (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample) - 8; |
| 10682 | __m128 factor; |
| 10683 | |
| 10684 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
| 10685 | |
| 10686 | factor = _mm_set1_ps(1.0f / 8388608.0f); |
| 10687 | |
| 10688 | for (i = 0; i < frameCount4; ++i) { |
| 10689 | __m128i side = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), shift0); |
| 10690 | __m128i right = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), shift1); |
| 10691 | __m128i left = _mm_add_epi32(right, side); |
| 10692 | __m128 leftf = _mm_mul_ps(_mm_cvtepi32_ps(left), factor); |
| 10693 | __m128 rightf = _mm_mul_ps(_mm_cvtepi32_ps(right), factor); |
| 10694 | |
| 10695 | _mm_storeu_ps(pOutputSamples + i*8 + 0, _mm_unpacklo_ps(leftf, rightf)); |
| 10696 | _mm_storeu_ps(pOutputSamples + i*8 + 4, _mm_unpackhi_ps(leftf, rightf)); |
| 10697 | } |
| 10698 | |
| 10699 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
| 10700 | drflac_uint32 side = pInputSamples0U32[i] << shift0; |
| 10701 | drflac_uint32 right = pInputSamples1U32[i] << shift1; |
| 10702 | drflac_uint32 left = right + side; |
| 10703 | |
| 10704 | pOutputSamples[i*2+0] = (drflac_int32)left / 8388608.0f; |
| 10705 | pOutputSamples[i*2+1] = (drflac_int32)right / 8388608.0f; |
| 10706 | } |
| 10707 | } |
| 10708 | #endif |
| 10709 | |
| 10710 | #if defined(DRFLAC_SUPPORT_NEON) |
| 10711 | static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_right_side__neon(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) |
| 10712 | { |
| 10713 | drflac_uint64 i; |
| 10714 | drflac_uint64 frameCount4 = frameCount >> 2; |
| 10715 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
| 10716 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
| 10717 | drflac_uint32 shift0 = (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample) - 8; |
| 10718 | drflac_uint32 shift1 = (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample) - 8; |
| 10719 | float32x4_t factor4; |
| 10720 | int32x4_t shift0_4; |
| 10721 | int32x4_t shift1_4; |
| 10722 | |
| 10723 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
| 10724 | |
| 10725 | factor4 = vdupq_n_f32(1.0f / 8388608.0f); |
| 10726 | shift0_4 = vdupq_n_s32(shift0); |
| 10727 | shift1_4 = vdupq_n_s32(shift1); |
| 10728 | |
| 10729 | for (i = 0; i < frameCount4; ++i) { |
| 10730 | uint32x4_t side; |
| 10731 | uint32x4_t right; |
| 10732 | uint32x4_t left; |
| 10733 | float32x4_t leftf; |
| 10734 | float32x4_t rightf; |
| 10735 | |
| 10736 | side = vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), shift0_4); |
| 10737 | right = vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), shift1_4); |
| 10738 | left = vaddq_u32(right, side); |
| 10739 | leftf = vmulq_f32(vcvtq_f32_s32(vreinterpretq_s32_u32(left)), factor4); |
| 10740 | rightf = vmulq_f32(vcvtq_f32_s32(vreinterpretq_s32_u32(right)), factor4); |
| 10741 | |
| 10742 | drflac__vst2q_f32(pOutputSamples + i*8, vzipq_f32(leftf, rightf)); |
| 10743 | } |
| 10744 | |
| 10745 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
| 10746 | drflac_uint32 side = pInputSamples0U32[i] << shift0; |
| 10747 | drflac_uint32 right = pInputSamples1U32[i] << shift1; |
| 10748 | drflac_uint32 left = right + side; |
| 10749 | |
| 10750 | pOutputSamples[i*2+0] = (drflac_int32)left / 8388608.0f; |
| 10751 | pOutputSamples[i*2+1] = (drflac_int32)right / 8388608.0f; |
| 10752 | } |
| 10753 | } |
| 10754 | #endif |
| 10755 | |
| 10756 | static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_right_side(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) |
| 10757 | { |
| 10758 | #if defined(DRFLAC_SUPPORT_SSE2) |
| 10759 | if (drflac__gIsSSE2Supported && pFlac->bitsPerSample <= 24) { |
| 10760 | drflac_read_pcm_frames_f32__decode_right_side__sse2(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
| 10761 | } else |
| 10762 | #elif defined(DRFLAC_SUPPORT_NEON) |
| 10763 | if (drflac__gIsNEONSupported && pFlac->bitsPerSample <= 24) { |
| 10764 | drflac_read_pcm_frames_f32__decode_right_side__neon(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
| 10765 | } else |
| 10766 | #endif |
| 10767 | { |
| 10768 | /* Scalar fallback. */ |
| 10769 | #if 0 |
| 10770 | drflac_read_pcm_frames_f32__decode_right_side__reference(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
| 10771 | #else |
| 10772 | drflac_read_pcm_frames_f32__decode_right_side__scalar(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
| 10773 | #endif |
| 10774 | } |
| 10775 | } |
| 10776 | |
| 10777 | |
| 10778 | #if 0 |
| 10779 | static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_mid_side__reference(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) |
| 10780 | { |
| 10781 | for (drflac_uint64 i = 0; i < frameCount; ++i) { |
| 10782 | drflac_uint32 mid = (drflac_uint32)pInputSamples0[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 10783 | drflac_uint32 side = (drflac_uint32)pInputSamples1[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 10784 | |
| 10785 | mid = (mid << 1) | (side & 0x01); |
| 10786 | |
| 10787 | pOutputSamples[i*2+0] = (float)((((drflac_int32)(mid + side) >> 1) << (unusedBitsPerSample)) / 2147483648.0); |
| 10788 | pOutputSamples[i*2+1] = (float)((((drflac_int32)(mid - side) >> 1) << (unusedBitsPerSample)) / 2147483648.0); |
| 10789 | } |
| 10790 | } |
| 10791 | #endif |
| 10792 | |
| 10793 | static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_mid_side__scalar(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) |
| 10794 | { |
| 10795 | drflac_uint64 i; |
| 10796 | drflac_uint64 frameCount4 = frameCount >> 2; |
| 10797 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
| 10798 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
| 10799 | drflac_uint32 shift = unusedBitsPerSample; |
| 10800 | float factor = 1 / 2147483648.0; |
| 10801 | |
| 10802 | if (shift > 0) { |
| 10803 | shift -= 1; |
| 10804 | for (i = 0; i < frameCount4; ++i) { |
| 10805 | drflac_uint32 temp0L; |
| 10806 | drflac_uint32 temp1L; |
| 10807 | drflac_uint32 temp2L; |
| 10808 | drflac_uint32 temp3L; |
| 10809 | drflac_uint32 temp0R; |
| 10810 | drflac_uint32 temp1R; |
| 10811 | drflac_uint32 temp2R; |
| 10812 | drflac_uint32 temp3R; |
| 10813 | |
| 10814 | drflac_uint32 mid0 = pInputSamples0U32[i*4+0] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 10815 | drflac_uint32 mid1 = pInputSamples0U32[i*4+1] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 10816 | drflac_uint32 mid2 = pInputSamples0U32[i*4+2] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 10817 | drflac_uint32 mid3 = pInputSamples0U32[i*4+3] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 10818 | |
| 10819 | drflac_uint32 side0 = pInputSamples1U32[i*4+0] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 10820 | drflac_uint32 side1 = pInputSamples1U32[i*4+1] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 10821 | drflac_uint32 side2 = pInputSamples1U32[i*4+2] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 10822 | drflac_uint32 side3 = pInputSamples1U32[i*4+3] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 10823 | |
| 10824 | mid0 = (mid0 << 1) | (side0 & 0x01); |
| 10825 | mid1 = (mid1 << 1) | (side1 & 0x01); |
| 10826 | mid2 = (mid2 << 1) | (side2 & 0x01); |
| 10827 | mid3 = (mid3 << 1) | (side3 & 0x01); |
| 10828 | |
| 10829 | temp0L = (mid0 + side0) << shift; |
| 10830 | temp1L = (mid1 + side1) << shift; |
| 10831 | temp2L = (mid2 + side2) << shift; |
| 10832 | temp3L = (mid3 + side3) << shift; |
| 10833 | |
| 10834 | temp0R = (mid0 - side0) << shift; |
| 10835 | temp1R = (mid1 - side1) << shift; |
| 10836 | temp2R = (mid2 - side2) << shift; |
| 10837 | temp3R = (mid3 - side3) << shift; |
| 10838 | |
| 10839 | pOutputSamples[i*8+0] = (drflac_int32)temp0L * factor; |
| 10840 | pOutputSamples[i*8+1] = (drflac_int32)temp0R * factor; |
| 10841 | pOutputSamples[i*8+2] = (drflac_int32)temp1L * factor; |
| 10842 | pOutputSamples[i*8+3] = (drflac_int32)temp1R * factor; |
| 10843 | pOutputSamples[i*8+4] = (drflac_int32)temp2L * factor; |
| 10844 | pOutputSamples[i*8+5] = (drflac_int32)temp2R * factor; |
| 10845 | pOutputSamples[i*8+6] = (drflac_int32)temp3L * factor; |
| 10846 | pOutputSamples[i*8+7] = (drflac_int32)temp3R * factor; |
| 10847 | } |
| 10848 | } else { |
| 10849 | for (i = 0; i < frameCount4; ++i) { |
| 10850 | drflac_uint32 temp0L; |
| 10851 | drflac_uint32 temp1L; |
| 10852 | drflac_uint32 temp2L; |
| 10853 | drflac_uint32 temp3L; |
| 10854 | drflac_uint32 temp0R; |
| 10855 | drflac_uint32 temp1R; |
| 10856 | drflac_uint32 temp2R; |
| 10857 | drflac_uint32 temp3R; |
| 10858 | |
| 10859 | drflac_uint32 mid0 = pInputSamples0U32[i*4+0] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 10860 | drflac_uint32 mid1 = pInputSamples0U32[i*4+1] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 10861 | drflac_uint32 mid2 = pInputSamples0U32[i*4+2] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 10862 | drflac_uint32 mid3 = pInputSamples0U32[i*4+3] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 10863 | |
| 10864 | drflac_uint32 side0 = pInputSamples1U32[i*4+0] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 10865 | drflac_uint32 side1 = pInputSamples1U32[i*4+1] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 10866 | drflac_uint32 side2 = pInputSamples1U32[i*4+2] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 10867 | drflac_uint32 side3 = pInputSamples1U32[i*4+3] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 10868 | |
| 10869 | mid0 = (mid0 << 1) | (side0 & 0x01); |
| 10870 | mid1 = (mid1 << 1) | (side1 & 0x01); |
| 10871 | mid2 = (mid2 << 1) | (side2 & 0x01); |
| 10872 | mid3 = (mid3 << 1) | (side3 & 0x01); |
| 10873 | |
| 10874 | temp0L = (drflac_uint32)((drflac_int32)(mid0 + side0) >> 1); |
| 10875 | temp1L = (drflac_uint32)((drflac_int32)(mid1 + side1) >> 1); |
| 10876 | temp2L = (drflac_uint32)((drflac_int32)(mid2 + side2) >> 1); |
| 10877 | temp3L = (drflac_uint32)((drflac_int32)(mid3 + side3) >> 1); |
| 10878 | |
| 10879 | temp0R = (drflac_uint32)((drflac_int32)(mid0 - side0) >> 1); |
| 10880 | temp1R = (drflac_uint32)((drflac_int32)(mid1 - side1) >> 1); |
| 10881 | temp2R = (drflac_uint32)((drflac_int32)(mid2 - side2) >> 1); |
| 10882 | temp3R = (drflac_uint32)((drflac_int32)(mid3 - side3) >> 1); |
| 10883 | |
| 10884 | pOutputSamples[i*8+0] = (drflac_int32)temp0L * factor; |
| 10885 | pOutputSamples[i*8+1] = (drflac_int32)temp0R * factor; |
| 10886 | pOutputSamples[i*8+2] = (drflac_int32)temp1L * factor; |
| 10887 | pOutputSamples[i*8+3] = (drflac_int32)temp1R * factor; |
| 10888 | pOutputSamples[i*8+4] = (drflac_int32)temp2L * factor; |
| 10889 | pOutputSamples[i*8+5] = (drflac_int32)temp2R * factor; |
| 10890 | pOutputSamples[i*8+6] = (drflac_int32)temp3L * factor; |
| 10891 | pOutputSamples[i*8+7] = (drflac_int32)temp3R * factor; |
| 10892 | } |
| 10893 | } |
| 10894 | |
| 10895 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
| 10896 | drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 10897 | drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 10898 | |
| 10899 | mid = (mid << 1) | (side & 0x01); |
| 10900 | |
| 10901 | pOutputSamples[i*2+0] = (drflac_int32)((drflac_uint32)((drflac_int32)(mid + side) >> 1) << unusedBitsPerSample) * factor; |
| 10902 | pOutputSamples[i*2+1] = (drflac_int32)((drflac_uint32)((drflac_int32)(mid - side) >> 1) << unusedBitsPerSample) * factor; |
| 10903 | } |
| 10904 | } |
| 10905 | |
| 10906 | #if defined(DRFLAC_SUPPORT_SSE2) |
| 10907 | static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_mid_side__sse2(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) |
| 10908 | { |
| 10909 | drflac_uint64 i; |
| 10910 | drflac_uint64 frameCount4 = frameCount >> 2; |
| 10911 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
| 10912 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
| 10913 | drflac_uint32 shift = unusedBitsPerSample - 8; |
| 10914 | float factor; |
| 10915 | __m128 factor128; |
| 10916 | |
| 10917 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
| 10918 | |
| 10919 | factor = 1.0f / 8388608.0f; |
| 10920 | factor128 = _mm_set1_ps(factor); |
| 10921 | |
| 10922 | if (shift == 0) { |
| 10923 | for (i = 0; i < frameCount4; ++i) { |
| 10924 | __m128i mid; |
| 10925 | __m128i side; |
| 10926 | __m128i tempL; |
| 10927 | __m128i tempR; |
| 10928 | __m128 leftf; |
| 10929 | __m128 rightf; |
| 10930 | |
| 10931 | mid = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); |
| 10932 | side = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); |
| 10933 | |
| 10934 | mid = _mm_or_si128(_mm_slli_epi32(mid, 1), _mm_and_si128(side, _mm_set1_epi32(0x01))); |
| 10935 | |
| 10936 | tempL = _mm_srai_epi32(_mm_add_epi32(mid, side), 1); |
| 10937 | tempR = _mm_srai_epi32(_mm_sub_epi32(mid, side), 1); |
| 10938 | |
| 10939 | leftf = _mm_mul_ps(_mm_cvtepi32_ps(tempL), factor128); |
| 10940 | rightf = _mm_mul_ps(_mm_cvtepi32_ps(tempR), factor128); |
| 10941 | |
| 10942 | _mm_storeu_ps(pOutputSamples + i*8 + 0, _mm_unpacklo_ps(leftf, rightf)); |
| 10943 | _mm_storeu_ps(pOutputSamples + i*8 + 4, _mm_unpackhi_ps(leftf, rightf)); |
| 10944 | } |
| 10945 | |
| 10946 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
| 10947 | drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 10948 | drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 10949 | |
| 10950 | mid = (mid << 1) | (side & 0x01); |
| 10951 | |
| 10952 | pOutputSamples[i*2+0] = ((drflac_int32)(mid + side) >> 1) * factor; |
| 10953 | pOutputSamples[i*2+1] = ((drflac_int32)(mid - side) >> 1) * factor; |
| 10954 | } |
| 10955 | } else { |
| 10956 | shift -= 1; |
| 10957 | for (i = 0; i < frameCount4; ++i) { |
| 10958 | __m128i mid; |
| 10959 | __m128i side; |
| 10960 | __m128i tempL; |
| 10961 | __m128i tempR; |
| 10962 | __m128 leftf; |
| 10963 | __m128 rightf; |
| 10964 | |
| 10965 | mid = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); |
| 10966 | side = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); |
| 10967 | |
| 10968 | mid = _mm_or_si128(_mm_slli_epi32(mid, 1), _mm_and_si128(side, _mm_set1_epi32(0x01))); |
| 10969 | |
| 10970 | tempL = _mm_slli_epi32(_mm_add_epi32(mid, side), shift); |
| 10971 | tempR = _mm_slli_epi32(_mm_sub_epi32(mid, side), shift); |
| 10972 | |
| 10973 | leftf = _mm_mul_ps(_mm_cvtepi32_ps(tempL), factor128); |
| 10974 | rightf = _mm_mul_ps(_mm_cvtepi32_ps(tempR), factor128); |
| 10975 | |
| 10976 | _mm_storeu_ps(pOutputSamples + i*8 + 0, _mm_unpacklo_ps(leftf, rightf)); |
| 10977 | _mm_storeu_ps(pOutputSamples + i*8 + 4, _mm_unpackhi_ps(leftf, rightf)); |
| 10978 | } |
| 10979 | |
| 10980 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
| 10981 | drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 10982 | drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 10983 | |
| 10984 | mid = (mid << 1) | (side & 0x01); |
| 10985 | |
| 10986 | pOutputSamples[i*2+0] = (drflac_int32)((mid + side) << shift) * factor; |
| 10987 | pOutputSamples[i*2+1] = (drflac_int32)((mid - side) << shift) * factor; |
| 10988 | } |
| 10989 | } |
| 10990 | } |
| 10991 | #endif |
| 10992 | |
| 10993 | #if defined(DRFLAC_SUPPORT_NEON) |
| 10994 | static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_mid_side__neon(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) |
| 10995 | { |
| 10996 | drflac_uint64 i; |
| 10997 | drflac_uint64 frameCount4 = frameCount >> 2; |
| 10998 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
| 10999 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
| 11000 | drflac_uint32 shift = unusedBitsPerSample - 8; |
| 11001 | float factor; |
| 11002 | float32x4_t factor4; |
| 11003 | int32x4_t shift4; |
| 11004 | int32x4_t wbps0_4; /* Wasted Bits Per Sample */ |
| 11005 | int32x4_t wbps1_4; /* Wasted Bits Per Sample */ |
| 11006 | |
| 11007 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
| 11008 | |
| 11009 | factor = 1.0f / 8388608.0f; |
| 11010 | factor4 = vdupq_n_f32(factor); |
| 11011 | wbps0_4 = vdupq_n_s32(pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); |
| 11012 | wbps1_4 = vdupq_n_s32(pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); |
| 11013 | |
| 11014 | if (shift == 0) { |
| 11015 | for (i = 0; i < frameCount4; ++i) { |
| 11016 | int32x4_t lefti; |
| 11017 | int32x4_t righti; |
| 11018 | float32x4_t leftf; |
| 11019 | float32x4_t rightf; |
| 11020 | |
| 11021 | uint32x4_t mid = vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), wbps0_4); |
| 11022 | uint32x4_t side = vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), wbps1_4); |
| 11023 | |
| 11024 | mid = vorrq_u32(vshlq_n_u32(mid, 1), vandq_u32(side, vdupq_n_u32(1))); |
| 11025 | |
| 11026 | lefti = vshrq_n_s32(vreinterpretq_s32_u32(vaddq_u32(mid, side)), 1); |
| 11027 | righti = vshrq_n_s32(vreinterpretq_s32_u32(vsubq_u32(mid, side)), 1); |
| 11028 | |
| 11029 | leftf = vmulq_f32(vcvtq_f32_s32(lefti), factor4); |
| 11030 | rightf = vmulq_f32(vcvtq_f32_s32(righti), factor4); |
| 11031 | |
| 11032 | drflac__vst2q_f32(pOutputSamples + i*8, vzipq_f32(leftf, rightf)); |
| 11033 | } |
| 11034 | |
| 11035 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
| 11036 | drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 11037 | drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 11038 | |
| 11039 | mid = (mid << 1) | (side & 0x01); |
| 11040 | |
| 11041 | pOutputSamples[i*2+0] = ((drflac_int32)(mid + side) >> 1) * factor; |
| 11042 | pOutputSamples[i*2+1] = ((drflac_int32)(mid - side) >> 1) * factor; |
| 11043 | } |
| 11044 | } else { |
| 11045 | shift -= 1; |
| 11046 | shift4 = vdupq_n_s32(shift); |
| 11047 | for (i = 0; i < frameCount4; ++i) { |
| 11048 | uint32x4_t mid; |
| 11049 | uint32x4_t side; |
| 11050 | int32x4_t lefti; |
| 11051 | int32x4_t righti; |
| 11052 | float32x4_t leftf; |
| 11053 | float32x4_t rightf; |
| 11054 | |
| 11055 | mid = vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), wbps0_4); |
| 11056 | side = vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), wbps1_4); |
| 11057 | |
| 11058 | mid = vorrq_u32(vshlq_n_u32(mid, 1), vandq_u32(side, vdupq_n_u32(1))); |
| 11059 | |
| 11060 | lefti = vreinterpretq_s32_u32(vshlq_u32(vaddq_u32(mid, side), shift4)); |
| 11061 | righti = vreinterpretq_s32_u32(vshlq_u32(vsubq_u32(mid, side), shift4)); |
| 11062 | |
| 11063 | leftf = vmulq_f32(vcvtq_f32_s32(lefti), factor4); |
| 11064 | rightf = vmulq_f32(vcvtq_f32_s32(righti), factor4); |
| 11065 | |
| 11066 | drflac__vst2q_f32(pOutputSamples + i*8, vzipq_f32(leftf, rightf)); |
| 11067 | } |
| 11068 | |
| 11069 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
| 11070 | drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 11071 | drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 11072 | |
| 11073 | mid = (mid << 1) | (side & 0x01); |
| 11074 | |
| 11075 | pOutputSamples[i*2+0] = (drflac_int32)((mid + side) << shift) * factor; |
| 11076 | pOutputSamples[i*2+1] = (drflac_int32)((mid - side) << shift) * factor; |
| 11077 | } |
| 11078 | } |
| 11079 | } |
| 11080 | #endif |
| 11081 | |
| 11082 | static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_mid_side(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) |
| 11083 | { |
| 11084 | #if defined(DRFLAC_SUPPORT_SSE2) |
| 11085 | if (drflac__gIsSSE2Supported && pFlac->bitsPerSample <= 24) { |
| 11086 | drflac_read_pcm_frames_f32__decode_mid_side__sse2(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
| 11087 | } else |
| 11088 | #elif defined(DRFLAC_SUPPORT_NEON) |
| 11089 | if (drflac__gIsNEONSupported && pFlac->bitsPerSample <= 24) { |
| 11090 | drflac_read_pcm_frames_f32__decode_mid_side__neon(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
| 11091 | } else |
| 11092 | #endif |
| 11093 | { |
| 11094 | /* Scalar fallback. */ |
| 11095 | #if 0 |
| 11096 | drflac_read_pcm_frames_f32__decode_mid_side__reference(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
| 11097 | #else |
| 11098 | drflac_read_pcm_frames_f32__decode_mid_side__scalar(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
| 11099 | #endif |
| 11100 | } |
| 11101 | } |
| 11102 | |
| 11103 | #if 0 |
| 11104 | static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_independent_stereo__reference(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) |
| 11105 | { |
| 11106 | for (drflac_uint64 i = 0; i < frameCount; ++i) { |
| 11107 | pOutputSamples[i*2+0] = (float)((drflac_int32)((drflac_uint32)pInputSamples0[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample)) / 2147483648.0); |
| 11108 | pOutputSamples[i*2+1] = (float)((drflac_int32)((drflac_uint32)pInputSamples1[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample)) / 2147483648.0); |
| 11109 | } |
| 11110 | } |
| 11111 | #endif |
| 11112 | |
| 11113 | static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_independent_stereo__scalar(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) |
| 11114 | { |
| 11115 | drflac_uint64 i; |
| 11116 | drflac_uint64 frameCount4 = frameCount >> 2; |
| 11117 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
| 11118 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
| 11119 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
| 11120 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
| 11121 | float factor = 1 / 2147483648.0; |
| 11122 | |
| 11123 | for (i = 0; i < frameCount4; ++i) { |
| 11124 | drflac_uint32 tempL0 = pInputSamples0U32[i*4+0] << shift0; |
| 11125 | drflac_uint32 tempL1 = pInputSamples0U32[i*4+1] << shift0; |
| 11126 | drflac_uint32 tempL2 = pInputSamples0U32[i*4+2] << shift0; |
| 11127 | drflac_uint32 tempL3 = pInputSamples0U32[i*4+3] << shift0; |
| 11128 | |
| 11129 | drflac_uint32 tempR0 = pInputSamples1U32[i*4+0] << shift1; |
| 11130 | drflac_uint32 tempR1 = pInputSamples1U32[i*4+1] << shift1; |
| 11131 | drflac_uint32 tempR2 = pInputSamples1U32[i*4+2] << shift1; |
| 11132 | drflac_uint32 tempR3 = pInputSamples1U32[i*4+3] << shift1; |
| 11133 | |
| 11134 | pOutputSamples[i*8+0] = (drflac_int32)tempL0 * factor; |
| 11135 | pOutputSamples[i*8+1] = (drflac_int32)tempR0 * factor; |
| 11136 | pOutputSamples[i*8+2] = (drflac_int32)tempL1 * factor; |
| 11137 | pOutputSamples[i*8+3] = (drflac_int32)tempR1 * factor; |
| 11138 | pOutputSamples[i*8+4] = (drflac_int32)tempL2 * factor; |
| 11139 | pOutputSamples[i*8+5] = (drflac_int32)tempR2 * factor; |
| 11140 | pOutputSamples[i*8+6] = (drflac_int32)tempL3 * factor; |
| 11141 | pOutputSamples[i*8+7] = (drflac_int32)tempR3 * factor; |
| 11142 | } |
| 11143 | |
| 11144 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
| 11145 | pOutputSamples[i*2+0] = (drflac_int32)(pInputSamples0U32[i] << shift0) * factor; |
| 11146 | pOutputSamples[i*2+1] = (drflac_int32)(pInputSamples1U32[i] << shift1) * factor; |
| 11147 | } |
| 11148 | } |
| 11149 | |
| 11150 | #if defined(DRFLAC_SUPPORT_SSE2) |
| 11151 | static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_independent_stereo__sse2(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) |
| 11152 | { |
| 11153 | drflac_uint64 i; |
| 11154 | drflac_uint64 frameCount4 = frameCount >> 2; |
| 11155 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
| 11156 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
| 11157 | drflac_uint32 shift0 = (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample) - 8; |
| 11158 | drflac_uint32 shift1 = (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample) - 8; |
| 11159 | |
| 11160 | float factor = 1.0f / 8388608.0f; |
| 11161 | __m128 factor128 = _mm_set1_ps(factor); |
| 11162 | |
| 11163 | for (i = 0; i < frameCount4; ++i) { |
| 11164 | __m128i lefti; |
| 11165 | __m128i righti; |
| 11166 | __m128 leftf; |
| 11167 | __m128 rightf; |
| 11168 | |
| 11169 | lefti = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), shift0); |
| 11170 | righti = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), shift1); |
| 11171 | |
| 11172 | leftf = _mm_mul_ps(_mm_cvtepi32_ps(lefti), factor128); |
| 11173 | rightf = _mm_mul_ps(_mm_cvtepi32_ps(righti), factor128); |
| 11174 | |
| 11175 | _mm_storeu_ps(pOutputSamples + i*8 + 0, _mm_unpacklo_ps(leftf, rightf)); |
| 11176 | _mm_storeu_ps(pOutputSamples + i*8 + 4, _mm_unpackhi_ps(leftf, rightf)); |
| 11177 | } |
| 11178 | |
| 11179 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
| 11180 | pOutputSamples[i*2+0] = (drflac_int32)(pInputSamples0U32[i] << shift0) * factor; |
| 11181 | pOutputSamples[i*2+1] = (drflac_int32)(pInputSamples1U32[i] << shift1) * factor; |
| 11182 | } |
| 11183 | } |
| 11184 | #endif |
| 11185 | |
| 11186 | #if defined(DRFLAC_SUPPORT_NEON) |
| 11187 | static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_independent_stereo__neon(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) |
| 11188 | { |
| 11189 | drflac_uint64 i; |
| 11190 | drflac_uint64 frameCount4 = frameCount >> 2; |
| 11191 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
| 11192 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
| 11193 | drflac_uint32 shift0 = (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample) - 8; |
| 11194 | drflac_uint32 shift1 = (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample) - 8; |
| 11195 | |
| 11196 | float factor = 1.0f / 8388608.0f; |
| 11197 | float32x4_t factor4 = vdupq_n_f32(factor); |
| 11198 | int32x4_t shift0_4 = vdupq_n_s32(shift0); |
| 11199 | int32x4_t shift1_4 = vdupq_n_s32(shift1); |
| 11200 | |
| 11201 | for (i = 0; i < frameCount4; ++i) { |
| 11202 | int32x4_t lefti; |
| 11203 | int32x4_t righti; |
| 11204 | float32x4_t leftf; |
| 11205 | float32x4_t rightf; |
| 11206 | |
| 11207 | lefti = vreinterpretq_s32_u32(vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), shift0_4)); |
| 11208 | righti = vreinterpretq_s32_u32(vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), shift1_4)); |
| 11209 | |
| 11210 | leftf = vmulq_f32(vcvtq_f32_s32(lefti), factor4); |
| 11211 | rightf = vmulq_f32(vcvtq_f32_s32(righti), factor4); |
| 11212 | |
| 11213 | drflac__vst2q_f32(pOutputSamples + i*8, vzipq_f32(leftf, rightf)); |
| 11214 | } |
| 11215 | |
| 11216 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
| 11217 | pOutputSamples[i*2+0] = (drflac_int32)(pInputSamples0U32[i] << shift0) * factor; |
| 11218 | pOutputSamples[i*2+1] = (drflac_int32)(pInputSamples1U32[i] << shift1) * factor; |
| 11219 | } |
| 11220 | } |
| 11221 | #endif |
| 11222 | |
| 11223 | static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_independent_stereo(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) |
| 11224 | { |
| 11225 | #if defined(DRFLAC_SUPPORT_SSE2) |
| 11226 | if (drflac__gIsSSE2Supported && pFlac->bitsPerSample <= 24) { |
| 11227 | drflac_read_pcm_frames_f32__decode_independent_stereo__sse2(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
| 11228 | } else |
| 11229 | #elif defined(DRFLAC_SUPPORT_NEON) |
| 11230 | if (drflac__gIsNEONSupported && pFlac->bitsPerSample <= 24) { |
| 11231 | drflac_read_pcm_frames_f32__decode_independent_stereo__neon(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
| 11232 | } else |
| 11233 | #endif |
| 11234 | { |
| 11235 | /* Scalar fallback. */ |
| 11236 | #if 0 |
| 11237 | drflac_read_pcm_frames_f32__decode_independent_stereo__reference(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
| 11238 | #else |
| 11239 | drflac_read_pcm_frames_f32__decode_independent_stereo__scalar(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
| 11240 | #endif |
| 11241 | } |
| 11242 | } |
| 11243 | |
| 11244 | DRFLAC_API drflac_uint64 drflac_read_pcm_frames_f32(drflac* pFlac, drflac_uint64 framesToRead, float* pBufferOut) |
| 11245 | { |
| 11246 | drflac_uint64 framesRead; |
| 11247 | drflac_uint32 unusedBitsPerSample; |
| 11248 | |
| 11249 | if (pFlac == NULL || framesToRead == 0) { |
| 11250 | return 0; |
| 11251 | } |
| 11252 | |
| 11253 | if (pBufferOut == NULL) { |
| 11254 | return drflac__seek_forward_by_pcm_frames(pFlac, framesToRead); |
| 11255 | } |
| 11256 | |
| 11257 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 32); |
| 11258 | unusedBitsPerSample = 32 - pFlac->bitsPerSample; |
| 11259 | |
| 11260 | framesRead = 0; |
| 11261 | while (framesToRead > 0) { |
| 11262 | /* If we've run out of samples in this frame, go to the next. */ |
| 11263 | if (pFlac->currentFLACFrame.pcmFramesRemaining == 0) { |
| 11264 | if (!drflac__read_and_decode_next_flac_frame(pFlac)) { |
| 11265 | break; /* Couldn't read the next frame, so just break from the loop and return. */ |
| 11266 | } |
| 11267 | } else { |
| 11268 | unsigned int channelCount = drflac__get_channel_count_from_channel_assignment(pFlac->currentFLACFrame.header.channelAssignment); |
| 11269 | drflac_uint64 iFirstPCMFrame = pFlac->currentFLACFrame.header.blockSizeInPCMFrames - pFlac->currentFLACFrame.pcmFramesRemaining; |
| 11270 | drflac_uint64 frameCountThisIteration = framesToRead; |
| 11271 | |
| 11272 | if (frameCountThisIteration > pFlac->currentFLACFrame.pcmFramesRemaining) { |
| 11273 | frameCountThisIteration = pFlac->currentFLACFrame.pcmFramesRemaining; |
| 11274 | } |
| 11275 | |
| 11276 | if (channelCount == 2) { |
| 11277 | const drflac_int32* pDecodedSamples0 = pFlac->currentFLACFrame.subframes[0].pSamplesS32 + iFirstPCMFrame; |
| 11278 | const drflac_int32* pDecodedSamples1 = pFlac->currentFLACFrame.subframes[1].pSamplesS32 + iFirstPCMFrame; |
| 11279 | |
| 11280 | switch (pFlac->currentFLACFrame.header.channelAssignment) |
| 11281 | { |
| 11282 | case DRFLAC_CHANNEL_ASSIGNMENT_LEFT_SIDE: |
| 11283 | { |
| 11284 | drflac_read_pcm_frames_f32__decode_left_side(pFlac, frameCountThisIteration, unusedBitsPerSample, pDecodedSamples0, pDecodedSamples1, pBufferOut); |
| 11285 | } break; |
| 11286 | |
| 11287 | case DRFLAC_CHANNEL_ASSIGNMENT_RIGHT_SIDE: |
| 11288 | { |
| 11289 | drflac_read_pcm_frames_f32__decode_right_side(pFlac, frameCountThisIteration, unusedBitsPerSample, pDecodedSamples0, pDecodedSamples1, pBufferOut); |
| 11290 | } break; |
| 11291 | |
| 11292 | case DRFLAC_CHANNEL_ASSIGNMENT_MID_SIDE: |
| 11293 | { |
| 11294 | drflac_read_pcm_frames_f32__decode_mid_side(pFlac, frameCountThisIteration, unusedBitsPerSample, pDecodedSamples0, pDecodedSamples1, pBufferOut); |
| 11295 | } break; |
| 11296 | |
| 11297 | case DRFLAC_CHANNEL_ASSIGNMENT_INDEPENDENT: |
| 11298 | default: |
| 11299 | { |
| 11300 | drflac_read_pcm_frames_f32__decode_independent_stereo(pFlac, frameCountThisIteration, unusedBitsPerSample, pDecodedSamples0, pDecodedSamples1, pBufferOut); |
| 11301 | } break; |
| 11302 | } |
| 11303 | } else { |
| 11304 | /* Generic interleaving. */ |
| 11305 | drflac_uint64 i; |
| 11306 | for (i = 0; i < frameCountThisIteration; ++i) { |
| 11307 | unsigned int j; |
| 11308 | for (j = 0; j < channelCount; ++j) { |
| 11309 | drflac_int32 sampleS32 = (drflac_int32)((drflac_uint32)(pFlac->currentFLACFrame.subframes[j].pSamplesS32[iFirstPCMFrame + i]) << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[j].wastedBitsPerSample)); |
| 11310 | pBufferOut[(i*channelCount)+j] = (float)(sampleS32 / 2147483648.0); |
| 11311 | } |
| 11312 | } |
| 11313 | } |
| 11314 | |
| 11315 | framesRead += frameCountThisIteration; |
| 11316 | pBufferOut += frameCountThisIteration * channelCount; |
| 11317 | framesToRead -= frameCountThisIteration; |
| 11318 | pFlac->currentPCMFrame += frameCountThisIteration; |
| 11319 | pFlac->currentFLACFrame.pcmFramesRemaining -= (unsigned int)frameCountThisIteration; |
| 11320 | } |
| 11321 | } |
| 11322 | |
| 11323 | return framesRead; |
| 11324 | } |
| 11325 | |
| 11326 | |
| 11327 | DRFLAC_API drflac_bool32 drflac_seek_to_pcm_frame(drflac* pFlac, drflac_uint64 pcmFrameIndex) |
| 11328 | { |
| 11329 | if (pFlac == NULL) { |
| 11330 | return DRFLAC_FALSE; |
| 11331 | } |
| 11332 | |
| 11333 | /* Don't do anything if we're already on the seek point. */ |
| 11334 | if (pFlac->currentPCMFrame == pcmFrameIndex) { |
| 11335 | return DRFLAC_TRUE; |
| 11336 | } |
| 11337 | |
| 11338 | /* |
| 11339 | If we don't know where the first frame begins then we can't seek. This will happen when the STREAMINFO block was not present |
| 11340 | when the decoder was opened. |
| 11341 | */ |
| 11342 | if (pFlac->firstFLACFramePosInBytes == 0) { |
| 11343 | return DRFLAC_FALSE; |
| 11344 | } |
| 11345 | |
| 11346 | if (pcmFrameIndex == 0) { |
| 11347 | pFlac->currentPCMFrame = 0; |
| 11348 | return drflac__seek_to_first_frame(pFlac); |
| 11349 | } else { |
| 11350 | drflac_bool32 wasSuccessful = DRFLAC_FALSE; |
| 11351 | |
| 11352 | /* Clamp the sample to the end. */ |
| 11353 | if (pcmFrameIndex > pFlac->totalPCMFrameCount) { |
| 11354 | pcmFrameIndex = pFlac->totalPCMFrameCount; |
| 11355 | } |
| 11356 | |
| 11357 | /* If the target sample and the current sample are in the same frame we just move the position forward. */ |
| 11358 | if (pcmFrameIndex > pFlac->currentPCMFrame) { |
| 11359 | /* Forward. */ |
| 11360 | drflac_uint32 offset = (drflac_uint32)(pcmFrameIndex - pFlac->currentPCMFrame); |
| 11361 | if (pFlac->currentFLACFrame.pcmFramesRemaining > offset) { |
| 11362 | pFlac->currentFLACFrame.pcmFramesRemaining -= offset; |
| 11363 | pFlac->currentPCMFrame = pcmFrameIndex; |
| 11364 | return DRFLAC_TRUE; |
| 11365 | } |
| 11366 | } else { |
| 11367 | /* Backward. */ |
| 11368 | drflac_uint32 offsetAbs = (drflac_uint32)(pFlac->currentPCMFrame - pcmFrameIndex); |
| 11369 | drflac_uint32 currentFLACFramePCMFrameCount = pFlac->currentFLACFrame.header.blockSizeInPCMFrames; |
| 11370 | drflac_uint32 currentFLACFramePCMFramesConsumed = currentFLACFramePCMFrameCount - pFlac->currentFLACFrame.pcmFramesRemaining; |
| 11371 | if (currentFLACFramePCMFramesConsumed > offsetAbs) { |
| 11372 | pFlac->currentFLACFrame.pcmFramesRemaining += offsetAbs; |
| 11373 | pFlac->currentPCMFrame = pcmFrameIndex; |
| 11374 | return DRFLAC_TRUE; |
| 11375 | } |
| 11376 | } |
| 11377 | |
| 11378 | /* |
| 11379 | Different techniques depending on encapsulation. Using the native FLAC seektable with Ogg encapsulation is a bit awkward so |
| 11380 | we'll instead use Ogg's natural seeking facility. |
| 11381 | */ |
| 11382 | #ifndef DR_FLAC_NO_OGG |
| 11383 | if (pFlac->container == drflac_container_ogg) |
| 11384 | { |
| 11385 | wasSuccessful = drflac_ogg__seek_to_pcm_frame(pFlac, pcmFrameIndex); |
| 11386 | } |
| 11387 | else |
| 11388 | #endif |
| 11389 | { |
| 11390 | /* First try seeking via the seek table. If this fails, fall back to a brute force seek which is much slower. */ |
| 11391 | if (/*!wasSuccessful && */!pFlac->_noSeekTableSeek) { |
| 11392 | wasSuccessful = drflac__seek_to_pcm_frame__seek_table(pFlac, pcmFrameIndex); |
| 11393 | } |
| 11394 | |
| 11395 | #if !defined(DR_FLAC_NO_CRC) |
| 11396 | /* Fall back to binary search if seek table seeking fails. This requires the length of the stream to be known. */ |
| 11397 | if (!wasSuccessful && !pFlac->_noBinarySearchSeek && pFlac->totalPCMFrameCount > 0) { |
| 11398 | wasSuccessful = drflac__seek_to_pcm_frame__binary_search(pFlac, pcmFrameIndex); |
| 11399 | } |
| 11400 | #endif |
| 11401 | |
| 11402 | /* Fall back to brute force if all else fails. */ |
| 11403 | if (!wasSuccessful && !pFlac->_noBruteForceSeek) { |
| 11404 | wasSuccessful = drflac__seek_to_pcm_frame__brute_force(pFlac, pcmFrameIndex); |
| 11405 | } |
| 11406 | } |
| 11407 | |
| 11408 | pFlac->currentPCMFrame = pcmFrameIndex; |
| 11409 | return wasSuccessful; |
| 11410 | } |
| 11411 | } |
| 11412 | |
| 11413 | |
| 11414 | |
| 11415 | /* High Level APIs */ |
| 11416 | |
| 11417 | #if defined(SIZE_MAX) |
| 11418 | #define DRFLAC_SIZE_MAX SIZE_MAX |
| 11419 | #else |
| 11420 | #if defined(DRFLAC_64BIT) |
| 11421 | #define DRFLAC_SIZE_MAX ((drflac_uint64)0xFFFFFFFFFFFFFFFF) |
| 11422 | #else |
| 11423 | #define DRFLAC_SIZE_MAX 0xFFFFFFFF |
| 11424 | #endif |
| 11425 | #endif |
| 11426 | |
| 11427 | |
| 11428 | /* Using a macro as the definition of the drflac__full_decode_and_close_*() API family. Sue me. */ |
| 11429 | #define DRFLAC_DEFINE_FULL_READ_AND_CLOSE(extension, type) \ |
| 11430 | static type* drflac__full_read_and_close_ ## extension (drflac* pFlac, unsigned int* channelsOut, unsigned int* sampleRateOut, drflac_uint64* totalPCMFrameCountOut)\ |
| 11431 | { \ |
| 11432 | type* pSampleData = NULL; \ |
| 11433 | drflac_uint64 totalPCMFrameCount; \ |
| 11434 | \ |
| 11435 | DRFLAC_ASSERT(pFlac != NULL); \ |
| 11436 | \ |
| 11437 | totalPCMFrameCount = pFlac->totalPCMFrameCount; \ |
| 11438 | \ |
| 11439 | if (totalPCMFrameCount == 0) { \ |
| 11440 | type buffer[4096]; \ |
| 11441 | drflac_uint64 pcmFramesRead; \ |
| 11442 | size_t sampleDataBufferSize = sizeof(buffer); \ |
| 11443 | \ |
| 11444 | pSampleData = (type*)drflac__malloc_from_callbacks(sampleDataBufferSize, &pFlac->allocationCallbacks); \ |
| 11445 | if (pSampleData == NULL) { \ |
| 11446 | goto on_error; \ |
| 11447 | } \ |
| 11448 | \ |
| 11449 | while ((pcmFramesRead = (drflac_uint64)drflac_read_pcm_frames_##extension(pFlac, sizeof(buffer)/sizeof(buffer[0])/pFlac->channels, buffer)) > 0) { \ |
| 11450 | if (((totalPCMFrameCount + pcmFramesRead) * pFlac->channels * sizeof(type)) > sampleDataBufferSize) { \ |
| 11451 | type* pNewSampleData; \ |
| 11452 | size_t newSampleDataBufferSize; \ |
| 11453 | \ |
| 11454 | newSampleDataBufferSize = sampleDataBufferSize * 2; \ |
| 11455 | pNewSampleData = (type*)drflac__realloc_from_callbacks(pSampleData, newSampleDataBufferSize, sampleDataBufferSize, &pFlac->allocationCallbacks); \ |
| 11456 | if (pNewSampleData == NULL) { \ |
| 11457 | drflac__free_from_callbacks(pSampleData, &pFlac->allocationCallbacks); \ |
| 11458 | goto on_error; \ |
| 11459 | } \ |
| 11460 | \ |
| 11461 | sampleDataBufferSize = newSampleDataBufferSize; \ |
| 11462 | pSampleData = pNewSampleData; \ |
| 11463 | } \ |
| 11464 | \ |
| 11465 | DRFLAC_COPY_MEMORY(pSampleData + (totalPCMFrameCount*pFlac->channels), buffer, (size_t)(pcmFramesRead*pFlac->channels*sizeof(type))); \ |
| 11466 | totalPCMFrameCount += pcmFramesRead; \ |
| 11467 | } \ |
| 11468 | \ |
| 11469 | /* At this point everything should be decoded, but we just want to fill the unused part buffer with silence - need to \ |
| 11470 | protect those ears from random noise! */ \ |
| 11471 | DRFLAC_ZERO_MEMORY(pSampleData + (totalPCMFrameCount*pFlac->channels), (size_t)(sampleDataBufferSize - totalPCMFrameCount*pFlac->channels*sizeof(type))); \ |
| 11472 | } else { \ |
| 11473 | drflac_uint64 dataSize = totalPCMFrameCount*pFlac->channels*sizeof(type); \ |
| 11474 | if (dataSize > DRFLAC_SIZE_MAX) { \ |
| 11475 | goto on_error; /* The decoded data is too big. */ \ |
| 11476 | } \ |
| 11477 | \ |
| 11478 | pSampleData = (type*)drflac__malloc_from_callbacks((size_t)dataSize, &pFlac->allocationCallbacks); /* <-- Safe cast as per the check above. */ \ |
| 11479 | if (pSampleData == NULL) { \ |
| 11480 | goto on_error; \ |
| 11481 | } \ |
| 11482 | \ |
| 11483 | totalPCMFrameCount = drflac_read_pcm_frames_##extension(pFlac, pFlac->totalPCMFrameCount, pSampleData); \ |
| 11484 | } \ |
| 11485 | \ |
| 11486 | if (sampleRateOut) *sampleRateOut = pFlac->sampleRate; \ |
| 11487 | if (channelsOut) *channelsOut = pFlac->channels; \ |
| 11488 | if (totalPCMFrameCountOut) *totalPCMFrameCountOut = totalPCMFrameCount; \ |
| 11489 | \ |
| 11490 | drflac_close(pFlac); \ |
| 11491 | return pSampleData; \ |
| 11492 | \ |
| 11493 | on_error: \ |
| 11494 | drflac_close(pFlac); \ |
| 11495 | return NULL; \ |
| 11496 | } |
| 11497 | |
| 11498 | DRFLAC_DEFINE_FULL_READ_AND_CLOSE(s32, drflac_int32) |
| 11499 | DRFLAC_DEFINE_FULL_READ_AND_CLOSE(s16, drflac_int16) |
| 11500 | DRFLAC_DEFINE_FULL_READ_AND_CLOSE(f32, float) |
| 11501 | |
| 11502 | DRFLAC_API drflac_int32* drflac_open_and_read_pcm_frames_s32(drflac_read_proc onRead, drflac_seek_proc onSeek, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drflac_uint64* totalPCMFrameCountOut, const drflac_allocation_callbacks* pAllocationCallbacks) |
| 11503 | { |
| 11504 | drflac* pFlac; |
| 11505 | |
| 11506 | if (channelsOut) { |
| 11507 | *channelsOut = 0; |
| 11508 | } |
| 11509 | if (sampleRateOut) { |
| 11510 | *sampleRateOut = 0; |
| 11511 | } |
| 11512 | if (totalPCMFrameCountOut) { |
| 11513 | *totalPCMFrameCountOut = 0; |
| 11514 | } |
| 11515 | |
| 11516 | pFlac = drflac_open(onRead, onSeek, pUserData, pAllocationCallbacks); |
| 11517 | if (pFlac == NULL) { |
| 11518 | return NULL; |
| 11519 | } |
| 11520 | |
| 11521 | return drflac__full_read_and_close_s32(pFlac, channelsOut, sampleRateOut, totalPCMFrameCountOut); |
| 11522 | } |
| 11523 | |
| 11524 | DRFLAC_API drflac_int16* drflac_open_and_read_pcm_frames_s16(drflac_read_proc onRead, drflac_seek_proc onSeek, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drflac_uint64* totalPCMFrameCountOut, const drflac_allocation_callbacks* pAllocationCallbacks) |
| 11525 | { |
| 11526 | drflac* pFlac; |
| 11527 | |
| 11528 | if (channelsOut) { |
| 11529 | *channelsOut = 0; |
| 11530 | } |
| 11531 | if (sampleRateOut) { |
| 11532 | *sampleRateOut = 0; |
| 11533 | } |
| 11534 | if (totalPCMFrameCountOut) { |
| 11535 | *totalPCMFrameCountOut = 0; |
| 11536 | } |
| 11537 | |
| 11538 | pFlac = drflac_open(onRead, onSeek, pUserData, pAllocationCallbacks); |
| 11539 | if (pFlac == NULL) { |
| 11540 | return NULL; |
| 11541 | } |
| 11542 | |
| 11543 | return drflac__full_read_and_close_s16(pFlac, channelsOut, sampleRateOut, totalPCMFrameCountOut); |
| 11544 | } |
| 11545 | |
| 11546 | DRFLAC_API float* drflac_open_and_read_pcm_frames_f32(drflac_read_proc onRead, drflac_seek_proc onSeek, void* pUserData, unsigned int* channelsOut, unsigned int* sampleRateOut, drflac_uint64* totalPCMFrameCountOut, const drflac_allocation_callbacks* pAllocationCallbacks) |
| 11547 | { |
| 11548 | drflac* pFlac; |
| 11549 | |
| 11550 | if (channelsOut) { |
| 11551 | *channelsOut = 0; |
| 11552 | } |
| 11553 | if (sampleRateOut) { |
| 11554 | *sampleRateOut = 0; |
| 11555 | } |
| 11556 | if (totalPCMFrameCountOut) { |
| 11557 | *totalPCMFrameCountOut = 0; |
| 11558 | } |
| 11559 | |
| 11560 | pFlac = drflac_open(onRead, onSeek, pUserData, pAllocationCallbacks); |
| 11561 | if (pFlac == NULL) { |
| 11562 | return NULL; |
| 11563 | } |
| 11564 | |
| 11565 | return drflac__full_read_and_close_f32(pFlac, channelsOut, sampleRateOut, totalPCMFrameCountOut); |
| 11566 | } |
| 11567 | |
| 11568 | #ifndef DR_FLAC_NO_STDIO |
| 11569 | DRFLAC_API drflac_int32* drflac_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalPCMFrameCount, const drflac_allocation_callbacks* pAllocationCallbacks) |
| 11570 | { |
| 11571 | drflac* pFlac; |
| 11572 | |
| 11573 | if (sampleRate) { |
| 11574 | *sampleRate = 0; |
| 11575 | } |
| 11576 | if (channels) { |
| 11577 | *channels = 0; |
| 11578 | } |
| 11579 | if (totalPCMFrameCount) { |
| 11580 | *totalPCMFrameCount = 0; |
| 11581 | } |
| 11582 | |
| 11583 | pFlac = drflac_open_file(filename, pAllocationCallbacks); |
| 11584 | if (pFlac == NULL) { |
| 11585 | return NULL; |
| 11586 | } |
| 11587 | |
| 11588 | return drflac__full_read_and_close_s32(pFlac, channels, sampleRate, totalPCMFrameCount); |
| 11589 | } |
| 11590 | |
| 11591 | DRFLAC_API drflac_int16* drflac_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalPCMFrameCount, const drflac_allocation_callbacks* pAllocationCallbacks) |
| 11592 | { |
| 11593 | drflac* pFlac; |
| 11594 | |
| 11595 | if (sampleRate) { |
| 11596 | *sampleRate = 0; |
| 11597 | } |
| 11598 | if (channels) { |
| 11599 | *channels = 0; |
| 11600 | } |
| 11601 | if (totalPCMFrameCount) { |
| 11602 | *totalPCMFrameCount = 0; |
| 11603 | } |
| 11604 | |
| 11605 | pFlac = drflac_open_file(filename, pAllocationCallbacks); |
| 11606 | if (pFlac == NULL) { |
| 11607 | return NULL; |
| 11608 | } |
| 11609 | |
| 11610 | return drflac__full_read_and_close_s16(pFlac, channels, sampleRate, totalPCMFrameCount); |
| 11611 | } |
| 11612 | |
| 11613 | DRFLAC_API float* drflac_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalPCMFrameCount, const drflac_allocation_callbacks* pAllocationCallbacks) |
| 11614 | { |
| 11615 | drflac* pFlac; |
| 11616 | |
| 11617 | if (sampleRate) { |
| 11618 | *sampleRate = 0; |
| 11619 | } |
| 11620 | if (channels) { |
| 11621 | *channels = 0; |
| 11622 | } |
| 11623 | if (totalPCMFrameCount) { |
| 11624 | *totalPCMFrameCount = 0; |
| 11625 | } |
| 11626 | |
| 11627 | pFlac = drflac_open_file(filename, pAllocationCallbacks); |
| 11628 | if (pFlac == NULL) { |
| 11629 | return NULL; |
| 11630 | } |
| 11631 | |
| 11632 | return drflac__full_read_and_close_f32(pFlac, channels, sampleRate, totalPCMFrameCount); |
| 11633 | } |
| 11634 | #endif |
| 11635 | |
| 11636 | DRFLAC_API drflac_int32* drflac_open_memory_and_read_pcm_frames_s32(const void* data, size_t dataSize, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalPCMFrameCount, const drflac_allocation_callbacks* pAllocationCallbacks) |
| 11637 | { |
| 11638 | drflac* pFlac; |
| 11639 | |
| 11640 | if (sampleRate) { |
| 11641 | *sampleRate = 0; |
| 11642 | } |
| 11643 | if (channels) { |
| 11644 | *channels = 0; |
| 11645 | } |
| 11646 | if (totalPCMFrameCount) { |
| 11647 | *totalPCMFrameCount = 0; |
| 11648 | } |
| 11649 | |
| 11650 | pFlac = drflac_open_memory(data, dataSize, pAllocationCallbacks); |
| 11651 | if (pFlac == NULL) { |
| 11652 | return NULL; |
| 11653 | } |
| 11654 | |
| 11655 | return drflac__full_read_and_close_s32(pFlac, channels, sampleRate, totalPCMFrameCount); |
| 11656 | } |
| 11657 | |
| 11658 | DRFLAC_API drflac_int16* drflac_open_memory_and_read_pcm_frames_s16(const void* data, size_t dataSize, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalPCMFrameCount, const drflac_allocation_callbacks* pAllocationCallbacks) |
| 11659 | { |
| 11660 | drflac* pFlac; |
| 11661 | |
| 11662 | if (sampleRate) { |
| 11663 | *sampleRate = 0; |
| 11664 | } |
| 11665 | if (channels) { |
| 11666 | *channels = 0; |
| 11667 | } |
| 11668 | if (totalPCMFrameCount) { |
| 11669 | *totalPCMFrameCount = 0; |
| 11670 | } |
| 11671 | |
| 11672 | pFlac = drflac_open_memory(data, dataSize, pAllocationCallbacks); |
| 11673 | if (pFlac == NULL) { |
| 11674 | return NULL; |
| 11675 | } |
| 11676 | |
| 11677 | return drflac__full_read_and_close_s16(pFlac, channels, sampleRate, totalPCMFrameCount); |
| 11678 | } |
| 11679 | |
| 11680 | DRFLAC_API float* drflac_open_memory_and_read_pcm_frames_f32(const void* data, size_t dataSize, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalPCMFrameCount, const drflac_allocation_callbacks* pAllocationCallbacks) |
| 11681 | { |
| 11682 | drflac* pFlac; |
| 11683 | |
| 11684 | if (sampleRate) { |
| 11685 | *sampleRate = 0; |
| 11686 | } |
| 11687 | if (channels) { |
| 11688 | *channels = 0; |
| 11689 | } |
| 11690 | if (totalPCMFrameCount) { |
| 11691 | *totalPCMFrameCount = 0; |
| 11692 | } |
| 11693 | |
| 11694 | pFlac = drflac_open_memory(data, dataSize, pAllocationCallbacks); |
| 11695 | if (pFlac == NULL) { |
| 11696 | return NULL; |
| 11697 | } |
| 11698 | |
| 11699 | return drflac__full_read_and_close_f32(pFlac, channels, sampleRate, totalPCMFrameCount); |
| 11700 | } |
| 11701 | |
| 11702 | |
| 11703 | DRFLAC_API void drflac_free(void* p, const drflac_allocation_callbacks* pAllocationCallbacks) |
| 11704 | { |
| 11705 | if (pAllocationCallbacks != NULL) { |
| 11706 | drflac__free_from_callbacks(p, pAllocationCallbacks); |
| 11707 | } else { |
| 11708 | drflac__free_default(p, NULL); |
| 11709 | } |
| 11710 | } |
| 11711 | |
| 11712 | |
| 11713 | |
| 11714 | |
| 11715 | DRFLAC_API void drflac_init_vorbis_comment_iterator(drflac_vorbis_comment_iterator* pIter, drflac_uint32 commentCount, const void* pComments) |
| 11716 | { |
| 11717 | if (pIter == NULL) { |
| 11718 | return; |
| 11719 | } |
| 11720 | |
| 11721 | pIter->countRemaining = commentCount; |
| 11722 | pIter->pRunningData = (const char*)pComments; |
| 11723 | } |
| 11724 | |
| 11725 | DRFLAC_API const char* drflac_next_vorbis_comment(drflac_vorbis_comment_iterator* pIter, drflac_uint32* pCommentLengthOut) |
| 11726 | { |
| 11727 | drflac_int32 length; |
| 11728 | const char* pComment; |
| 11729 | |
| 11730 | /* Safety. */ |
| 11731 | if (pCommentLengthOut) { |
| 11732 | *pCommentLengthOut = 0; |
| 11733 | } |
| 11734 | |
| 11735 | if (pIter == NULL || pIter->countRemaining == 0 || pIter->pRunningData == NULL) { |
| 11736 | return NULL; |
| 11737 | } |
| 11738 | |
| 11739 | length = drflac__le2host_32(*(const drflac_uint32*)pIter->pRunningData); |
| 11740 | pIter->pRunningData += 4; |
| 11741 | |
| 11742 | pComment = pIter->pRunningData; |
| 11743 | pIter->pRunningData += length; |
| 11744 | pIter->countRemaining -= 1; |
| 11745 | |
| 11746 | if (pCommentLengthOut) { |
| 11747 | *pCommentLengthOut = length; |
| 11748 | } |
| 11749 | |
| 11750 | return pComment; |
| 11751 | } |
| 11752 | |
| 11753 | |
| 11754 | |
| 11755 | |
| 11756 | DRFLAC_API void drflac_init_cuesheet_track_iterator(drflac_cuesheet_track_iterator* pIter, drflac_uint32 trackCount, const void* pTrackData) |
| 11757 | { |
| 11758 | if (pIter == NULL) { |
| 11759 | return; |
| 11760 | } |
| 11761 | |
| 11762 | pIter->countRemaining = trackCount; |
| 11763 | pIter->pRunningData = (const char*)pTrackData; |
| 11764 | } |
| 11765 | |
| 11766 | DRFLAC_API drflac_bool32 drflac_next_cuesheet_track(drflac_cuesheet_track_iterator* pIter, drflac_cuesheet_track* pCuesheetTrack) |
| 11767 | { |
| 11768 | drflac_cuesheet_track cuesheetTrack; |
| 11769 | const char* pRunningData; |
| 11770 | drflac_uint64 offsetHi; |
| 11771 | drflac_uint64 offsetLo; |
| 11772 | |
| 11773 | if (pIter == NULL || pIter->countRemaining == 0 || pIter->pRunningData == NULL) { |
| 11774 | return DRFLAC_FALSE; |
| 11775 | } |
| 11776 | |
| 11777 | pRunningData = pIter->pRunningData; |
| 11778 | |
| 11779 | offsetHi = drflac__be2host_32(*(const drflac_uint32*)pRunningData); pRunningData += 4; |
| 11780 | offsetLo = drflac__be2host_32(*(const drflac_uint32*)pRunningData); pRunningData += 4; |
| 11781 | cuesheetTrack.offset = offsetLo | (offsetHi << 32); |
| 11782 | cuesheetTrack.trackNumber = pRunningData[0]; pRunningData += 1; |
| 11783 | DRFLAC_COPY_MEMORY(cuesheetTrack.ISRC, pRunningData, sizeof(cuesheetTrack.ISRC)); pRunningData += 12; |
| 11784 | cuesheetTrack.isAudio = (pRunningData[0] & 0x80) != 0; |
| 11785 | cuesheetTrack.preEmphasis = (pRunningData[0] & 0x40) != 0; pRunningData += 14; |
| 11786 | cuesheetTrack.indexCount = pRunningData[0]; pRunningData += 1; |
| 11787 | cuesheetTrack.pIndexPoints = (const drflac_cuesheet_track_index*)pRunningData; pRunningData += cuesheetTrack.indexCount * sizeof(drflac_cuesheet_track_index); |
| 11788 | |
| 11789 | pIter->pRunningData = pRunningData; |
| 11790 | pIter->countRemaining -= 1; |
| 11791 | |
| 11792 | if (pCuesheetTrack) { |
| 11793 | *pCuesheetTrack = cuesheetTrack; |
| 11794 | } |
| 11795 | |
| 11796 | return DRFLAC_TRUE; |
| 11797 | } |
| 11798 | |
| 11799 | #if defined(__clang__) || (defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6))) |
| 11800 | #pragma GCC diagnostic pop |
| 11801 | #endif |
| 11802 | #endif /* dr_flac_c */ |
| 11803 | #endif /* DR_FLAC_IMPLEMENTATION */ |
| 11804 | |
| 11805 | |
| 11806 | /* |
| 11807 | REVISION HISTORY |
| 11808 | ================ |
| 11809 | v0.12.28 - 2021-02-21 |
| 11810 | - Fix a warning due to referencing _MSC_VER when it is undefined. |
| 11811 | |
| 11812 | v0.12.27 - 2021-01-31 |
| 11813 | - Fix a static analysis warning. |
| 11814 | |
| 11815 | v0.12.26 - 2021-01-17 |
| 11816 | - Fix a compilation warning due to _BSD_SOURCE being deprecated. |
| 11817 | |
| 11818 | v0.12.25 - 2020-12-26 |
| 11819 | - Update documentation. |
| 11820 | |
| 11821 | v0.12.24 - 2020-11-29 |
| 11822 | - Fix ARM64/NEON detection when compiling with MSVC. |
| 11823 | |
| 11824 | v0.12.23 - 2020-11-21 |
| 11825 | - Fix compilation with OpenWatcom. |
| 11826 | |
| 11827 | v0.12.22 - 2020-11-01 |
| 11828 | - Fix an error with the previous release. |
| 11829 | |
| 11830 | v0.12.21 - 2020-11-01 |
| 11831 | - Fix a possible deadlock when seeking. |
| 11832 | - Improve compiler support for older versions of GCC. |
| 11833 | |
| 11834 | v0.12.20 - 2020-09-08 |
| 11835 | - Fix a compilation error on older compilers. |
| 11836 | |
| 11837 | v0.12.19 - 2020-08-30 |
| 11838 | - Fix a bug due to an undefined 32-bit shift. |
| 11839 | |
| 11840 | v0.12.18 - 2020-08-14 |
| 11841 | - Fix a crash when compiling with clang-cl. |
| 11842 | |
| 11843 | v0.12.17 - 2020-08-02 |
| 11844 | - Simplify sized types. |
| 11845 | |
| 11846 | v0.12.16 - 2020-07-25 |
| 11847 | - Fix a compilation warning. |
| 11848 | |
| 11849 | v0.12.15 - 2020-07-06 |
| 11850 | - Check for negative LPC shifts and return an error. |
| 11851 | |
| 11852 | v0.12.14 - 2020-06-23 |
| 11853 | - Add include guard for the implementation section. |
| 11854 | |
| 11855 | v0.12.13 - 2020-05-16 |
| 11856 | - Add compile-time and run-time version querying. |
| 11857 | - DRFLAC_VERSION_MINOR |
| 11858 | - DRFLAC_VERSION_MAJOR |
| 11859 | - DRFLAC_VERSION_REVISION |
| 11860 | - DRFLAC_VERSION_STRING |
| 11861 | - drflac_version() |
| 11862 | - drflac_version_string() |
| 11863 | |
| 11864 | v0.12.12 - 2020-04-30 |
| 11865 | - Fix compilation errors with VC6. |
| 11866 | |
| 11867 | v0.12.11 - 2020-04-19 |
| 11868 | - Fix some pedantic warnings. |
| 11869 | - Fix some undefined behaviour warnings. |
| 11870 | |
| 11871 | v0.12.10 - 2020-04-10 |
| 11872 | - Fix some bugs when trying to seek with an invalid seek table. |
| 11873 | |
| 11874 | v0.12.9 - 2020-04-05 |
| 11875 | - Fix warnings. |
| 11876 | |
| 11877 | v0.12.8 - 2020-04-04 |
| 11878 | - Add drflac_open_file_w() and drflac_open_file_with_metadata_w(). |
| 11879 | - Fix some static analysis warnings. |
| 11880 | - Minor documentation updates. |
| 11881 | |
| 11882 | v0.12.7 - 2020-03-14 |
| 11883 | - Fix compilation errors with VC6. |
| 11884 | |
| 11885 | v0.12.6 - 2020-03-07 |
| 11886 | - Fix compilation error with Visual Studio .NET 2003. |
| 11887 | |
| 11888 | v0.12.5 - 2020-01-30 |
| 11889 | - Silence some static analysis warnings. |
| 11890 | |
| 11891 | v0.12.4 - 2020-01-29 |
| 11892 | - Silence some static analysis warnings. |
| 11893 | |
| 11894 | v0.12.3 - 2019-12-02 |
| 11895 | - Fix some warnings when compiling with GCC and the -Og flag. |
| 11896 | - Fix a crash in out-of-memory situations. |
| 11897 | - Fix potential integer overflow bug. |
| 11898 | - Fix some static analysis warnings. |
| 11899 | - Fix a possible crash when using custom memory allocators without a custom realloc() implementation. |
| 11900 | - Fix a bug with binary search seeking where the bits per sample is not a multiple of 8. |
| 11901 | |
| 11902 | v0.12.2 - 2019-10-07 |
| 11903 | - Internal code clean up. |
| 11904 | |
| 11905 | v0.12.1 - 2019-09-29 |
| 11906 | - Fix some Clang Static Analyzer warnings. |
| 11907 | - Fix an unused variable warning. |
| 11908 | |
| 11909 | v0.12.0 - 2019-09-23 |
| 11910 | - API CHANGE: Add support for user defined memory allocation routines. This system allows the program to specify their own memory allocation |
| 11911 | routines with a user data pointer for client-specific contextual data. This adds an extra parameter to the end of the following APIs: |
| 11912 | - drflac_open() |
| 11913 | - drflac_open_relaxed() |
| 11914 | - drflac_open_with_metadata() |
| 11915 | - drflac_open_with_metadata_relaxed() |
| 11916 | - drflac_open_file() |
| 11917 | - drflac_open_file_with_metadata() |
| 11918 | - drflac_open_memory() |
| 11919 | - drflac_open_memory_with_metadata() |
| 11920 | - drflac_open_and_read_pcm_frames_s32() |
| 11921 | - drflac_open_and_read_pcm_frames_s16() |
| 11922 | - drflac_open_and_read_pcm_frames_f32() |
| 11923 | - drflac_open_file_and_read_pcm_frames_s32() |
| 11924 | - drflac_open_file_and_read_pcm_frames_s16() |
| 11925 | - drflac_open_file_and_read_pcm_frames_f32() |
| 11926 | - drflac_open_memory_and_read_pcm_frames_s32() |
| 11927 | - drflac_open_memory_and_read_pcm_frames_s16() |
| 11928 | - drflac_open_memory_and_read_pcm_frames_f32() |
| 11929 | Set this extra parameter to NULL to use defaults which is the same as the previous behaviour. Setting this NULL will use |
| 11930 | DRFLAC_MALLOC, DRFLAC_REALLOC and DRFLAC_FREE. |
| 11931 | - Remove deprecated APIs: |
| 11932 | - drflac_read_s32() |
| 11933 | - drflac_read_s16() |
| 11934 | - drflac_read_f32() |
| 11935 | - drflac_seek_to_sample() |
| 11936 | - drflac_open_and_decode_s32() |
| 11937 | - drflac_open_and_decode_s16() |
| 11938 | - drflac_open_and_decode_f32() |
| 11939 | - drflac_open_and_decode_file_s32() |
| 11940 | - drflac_open_and_decode_file_s16() |
| 11941 | - drflac_open_and_decode_file_f32() |
| 11942 | - drflac_open_and_decode_memory_s32() |
| 11943 | - drflac_open_and_decode_memory_s16() |
| 11944 | - drflac_open_and_decode_memory_f32() |
| 11945 | - Remove drflac.totalSampleCount which is now replaced with drflac.totalPCMFrameCount. You can emulate drflac.totalSampleCount |
| 11946 | by doing pFlac->totalPCMFrameCount*pFlac->channels. |
| 11947 | - Rename drflac.currentFrame to drflac.currentFLACFrame to remove ambiguity with PCM frames. |
| 11948 | - Fix errors when seeking to the end of a stream. |
| 11949 | - Optimizations to seeking. |
| 11950 | - SSE improvements and optimizations. |
| 11951 | - ARM NEON optimizations. |
| 11952 | - Optimizations to drflac_read_pcm_frames_s16(). |
| 11953 | - Optimizations to drflac_read_pcm_frames_s32(). |
| 11954 | |
| 11955 | v0.11.10 - 2019-06-26 |
| 11956 | - Fix a compiler error. |
| 11957 | |
| 11958 | v0.11.9 - 2019-06-16 |
| 11959 | - Silence some ThreadSanitizer warnings. |
| 11960 | |
| 11961 | v0.11.8 - 2019-05-21 |
| 11962 | - Fix warnings. |
| 11963 | |
| 11964 | v0.11.7 - 2019-05-06 |
| 11965 | - C89 fixes. |
| 11966 | |
| 11967 | v0.11.6 - 2019-05-05 |
| 11968 | - Add support for C89. |
| 11969 | - Fix a compiler warning when CRC is disabled. |
| 11970 | - Change license to choice of public domain or MIT-0. |
| 11971 | |
| 11972 | v0.11.5 - 2019-04-19 |
| 11973 | - Fix a compiler error with GCC. |
| 11974 | |
| 11975 | v0.11.4 - 2019-04-17 |
| 11976 | - Fix some warnings with GCC when compiling with -std=c99. |
| 11977 | |
| 11978 | v0.11.3 - 2019-04-07 |
| 11979 | - Silence warnings with GCC. |
| 11980 | |
| 11981 | v0.11.2 - 2019-03-10 |
| 11982 | - Fix a warning. |
| 11983 | |
| 11984 | v0.11.1 - 2019-02-17 |
| 11985 | - Fix a potential bug with seeking. |
| 11986 | |
| 11987 | v0.11.0 - 2018-12-16 |
| 11988 | - API CHANGE: Deprecated drflac_read_s32(), drflac_read_s16() and drflac_read_f32() and replaced them with |
| 11989 | drflac_read_pcm_frames_s32(), drflac_read_pcm_frames_s16() and drflac_read_pcm_frames_f32(). The new APIs take |
| 11990 | and return PCM frame counts instead of sample counts. To upgrade you will need to change the input count by |
| 11991 | dividing it by the channel count, and then do the same with the return value. |
| 11992 | - API_CHANGE: Deprecated drflac_seek_to_sample() and replaced with drflac_seek_to_pcm_frame(). Same rules as |
| 11993 | the changes to drflac_read_*() apply. |
| 11994 | - API CHANGE: Deprecated drflac_open_and_decode_*() and replaced with drflac_open_*_and_read_*(). Same rules as |
| 11995 | the changes to drflac_read_*() apply. |
| 11996 | - Optimizations. |
| 11997 | |
| 11998 | v0.10.0 - 2018-09-11 |
| 11999 | - Remove the DR_FLAC_NO_WIN32_IO option and the Win32 file IO functionality. If you need to use Win32 file IO you |
| 12000 | need to do it yourself via the callback API. |
| 12001 | - Fix the clang build. |
| 12002 | - Fix undefined behavior. |
| 12003 | - Fix errors with CUESHEET metdata blocks. |
| 12004 | - Add an API for iterating over each cuesheet track in the CUESHEET metadata block. This works the same way as the |
| 12005 | Vorbis comment API. |
| 12006 | - Other miscellaneous bug fixes, mostly relating to invalid FLAC streams. |
| 12007 | - Minor optimizations. |
| 12008 | |
| 12009 | v0.9.11 - 2018-08-29 |
| 12010 | - Fix a bug with sample reconstruction. |
| 12011 | |
| 12012 | v0.9.10 - 2018-08-07 |
| 12013 | - Improve 64-bit detection. |
| 12014 | |
| 12015 | v0.9.9 - 2018-08-05 |
| 12016 | - Fix C++ build on older versions of GCC. |
| 12017 | |
| 12018 | v0.9.8 - 2018-07-24 |
| 12019 | - Fix compilation errors. |
| 12020 | |
| 12021 | v0.9.7 - 2018-07-05 |
| 12022 | - Fix a warning. |
| 12023 | |
| 12024 | v0.9.6 - 2018-06-29 |
| 12025 | - Fix some typos. |
| 12026 | |
| 12027 | v0.9.5 - 2018-06-23 |
| 12028 | - Fix some warnings. |
| 12029 | |
| 12030 | v0.9.4 - 2018-06-14 |
| 12031 | - Optimizations to seeking. |
| 12032 | - Clean up. |
| 12033 | |
| 12034 | v0.9.3 - 2018-05-22 |
| 12035 | - Bug fix. |
| 12036 | |
| 12037 | v0.9.2 - 2018-05-12 |
| 12038 | - Fix a compilation error due to a missing break statement. |
| 12039 | |
| 12040 | v0.9.1 - 2018-04-29 |
| 12041 | - Fix compilation error with Clang. |
| 12042 | |
| 12043 | v0.9 - 2018-04-24 |
| 12044 | - Fix Clang build. |
| 12045 | - Start using major.minor.revision versioning. |
| 12046 | |
| 12047 | v0.8g - 2018-04-19 |
| 12048 | - Fix build on non-x86/x64 architectures. |
| 12049 | |
| 12050 | v0.8f - 2018-02-02 |
| 12051 | - Stop pretending to support changing rate/channels mid stream. |
| 12052 | |
| 12053 | v0.8e - 2018-02-01 |
| 12054 | - Fix a crash when the block size of a frame is larger than the maximum block size defined by the FLAC stream. |
| 12055 | - Fix a crash the the Rice partition order is invalid. |
| 12056 | |
| 12057 | v0.8d - 2017-09-22 |
| 12058 | - Add support for decoding streams with ID3 tags. ID3 tags are just skipped. |
| 12059 | |
| 12060 | v0.8c - 2017-09-07 |
| 12061 | - Fix warning on non-x86/x64 architectures. |
| 12062 | |
| 12063 | v0.8b - 2017-08-19 |
| 12064 | - Fix build on non-x86/x64 architectures. |
| 12065 | |
| 12066 | v0.8a - 2017-08-13 |
| 12067 | - A small optimization for the Clang build. |
| 12068 | |
| 12069 | v0.8 - 2017-08-12 |
| 12070 | - API CHANGE: Rename dr_* types to drflac_*. |
| 12071 | - Optimizations. This brings dr_flac back to about the same class of efficiency as the reference implementation. |
| 12072 | - Add support for custom implementations of malloc(), realloc(), etc. |
| 12073 | - Add CRC checking to Ogg encapsulated streams. |
| 12074 | - Fix VC++ 6 build. This is only for the C++ compiler. The C compiler is not currently supported. |
| 12075 | - Bug fixes. |
| 12076 | |
| 12077 | v0.7 - 2017-07-23 |
| 12078 | - Add support for opening a stream without a header block. To do this, use drflac_open_relaxed() / drflac_open_with_metadata_relaxed(). |
| 12079 | |
| 12080 | v0.6 - 2017-07-22 |
| 12081 | - Add support for recovering from invalid frames. With this change, dr_flac will simply skip over invalid frames as if they |
| 12082 | never existed. Frames are checked against their sync code, the CRC-8 of the frame header and the CRC-16 of the whole frame. |
| 12083 | |
| 12084 | v0.5 - 2017-07-16 |
| 12085 | - Fix typos. |
| 12086 | - Change drflac_bool* types to unsigned. |
| 12087 | - Add CRC checking. This makes dr_flac slower, but can be disabled with #define DR_FLAC_NO_CRC. |
| 12088 | |
| 12089 | v0.4f - 2017-03-10 |
| 12090 | - Fix a couple of bugs with the bitstreaming code. |
| 12091 | |
| 12092 | v0.4e - 2017-02-17 |
| 12093 | - Fix some warnings. |
| 12094 | |
| 12095 | v0.4d - 2016-12-26 |
| 12096 | - Add support for 32-bit floating-point PCM decoding. |
| 12097 | - Use drflac_int* and drflac_uint* sized types to improve compiler support. |
| 12098 | - Minor improvements to documentation. |
| 12099 | |
| 12100 | v0.4c - 2016-12-26 |
| 12101 | - Add support for signed 16-bit integer PCM decoding. |
| 12102 | |
| 12103 | v0.4b - 2016-10-23 |
| 12104 | - A minor change to drflac_bool8 and drflac_bool32 types. |
| 12105 | |
| 12106 | v0.4a - 2016-10-11 |
| 12107 | - Rename drBool32 to drflac_bool32 for styling consistency. |
| 12108 | |
| 12109 | v0.4 - 2016-09-29 |
| 12110 | - API/ABI CHANGE: Use fixed size 32-bit booleans instead of the built-in bool type. |
| 12111 | - API CHANGE: Rename drflac_open_and_decode*() to drflac_open_and_decode*_s32(). |
| 12112 | - API CHANGE: Swap the order of "channels" and "sampleRate" parameters in drflac_open_and_decode*(). Rationale for this is to |
| 12113 | keep it consistent with drflac_audio. |
| 12114 | |
| 12115 | v0.3f - 2016-09-21 |
| 12116 | - Fix a warning with GCC. |
| 12117 | |
| 12118 | v0.3e - 2016-09-18 |
| 12119 | - Fixed a bug where GCC 4.3+ was not getting properly identified. |
| 12120 | - Fixed a few typos. |
| 12121 | - Changed date formats to ISO 8601 (YYYY-MM-DD). |
| 12122 | |
| 12123 | v0.3d - 2016-06-11 |
| 12124 | - Minor clean up. |
| 12125 | |
| 12126 | v0.3c - 2016-05-28 |
| 12127 | - Fixed compilation error. |
| 12128 | |
| 12129 | v0.3b - 2016-05-16 |
| 12130 | - Fixed Linux/GCC build. |
| 12131 | - Updated documentation. |
| 12132 | |
| 12133 | v0.3a - 2016-05-15 |
| 12134 | - Minor fixes to documentation. |
| 12135 | |
| 12136 | v0.3 - 2016-05-11 |
| 12137 | - Optimizations. Now at about parity with the reference implementation on 32-bit builds. |
| 12138 | - Lots of clean up. |
| 12139 | |
| 12140 | v0.2b - 2016-05-10 |
| 12141 | - Bug fixes. |
| 12142 | |
| 12143 | v0.2a - 2016-05-10 |
| 12144 | - Made drflac_open_and_decode() more robust. |
| 12145 | - Removed an unused debugging variable |
| 12146 | |
| 12147 | v0.2 - 2016-05-09 |
| 12148 | - Added support for Ogg encapsulation. |
| 12149 | - API CHANGE. Have the onSeek callback take a third argument which specifies whether or not the seek |
| 12150 | should be relative to the start or the current position. Also changes the seeking rules such that |
| 12151 | seeking offsets will never be negative. |
| 12152 | - Have drflac_open_and_decode() fail gracefully if the stream has an unknown total sample count. |
| 12153 | |
| 12154 | v0.1b - 2016-05-07 |
| 12155 | - Properly close the file handle in drflac_open_file() and family when the decoder fails to initialize. |
| 12156 | - Removed a stale comment. |
| 12157 | |
| 12158 | v0.1a - 2016-05-05 |
| 12159 | - Minor formatting changes. |
| 12160 | - Fixed a warning on the GCC build. |
| 12161 | |
| 12162 | v0.1 - 2016-05-03 |
| 12163 | - Initial versioned release. |
| 12164 | */ |
| 12165 | |
| 12166 | /* |
| 12167 | This software is available as a choice of the following licenses. Choose |
| 12168 | whichever you prefer. |
| 12169 | |
| 12170 | =============================================================================== |
| 12171 | ALTERNATIVE 1 - Public Domain (www.unlicense.org) |
| 12172 | =============================================================================== |
| 12173 | This is free and unencumbered software released into the public domain. |
| 12174 | |
| 12175 | Anyone is free to copy, modify, publish, use, compile, sell, or distribute this |
| 12176 | software, either in source code form or as a compiled binary, for any purpose, |
| 12177 | commercial or non-commercial, and by any means. |
| 12178 | |
| 12179 | In jurisdictions that recognize copyright laws, the author or authors of this |
| 12180 | software dedicate any and all copyright interest in the software to the public |
| 12181 | domain. We make this dedication for the benefit of the public at large and to |
| 12182 | the detriment of our heirs and successors. We intend this dedication to be an |
| 12183 | overt act of relinquishment in perpetuity of all present and future rights to |
| 12184 | this software under copyright law. |
| 12185 | |
| 12186 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 12187 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 12188 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 12189 | AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 12190 | ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION |
| 12191 | WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| 12192 | |
| 12193 | For more information, please refer to <http://unlicense.org/> |
| 12194 | |
| 12195 | =============================================================================== |
| 12196 | ALTERNATIVE 2 - MIT No Attribution |
| 12197 | =============================================================================== |
| 12198 | Copyright 2020 David Reid |
| 12199 | |
| 12200 | Permission is hereby granted, free of charge, to any person obtaining a copy of |
| 12201 | this software and associated documentation files (the "Software"), to deal in |
| 12202 | the Software without restriction, including without limitation the rights to |
| 12203 | use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies |
| 12204 | of the Software, and to permit persons to whom the Software is furnished to do |
| 12205 | so. |
| 12206 | |
| 12207 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 12208 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 12209 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 12210 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 12211 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 12212 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 12213 | SOFTWARE. |
| 12214 | */ |