2ff0b512 |
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 | |
2ff0b512 |
1058 | /* |
1059 | Opens a FLAC decoder from a pre-allocated block of memory |
1060 | |
1061 | |
1062 | Parameters |
1063 | ---------- |
1064 | pData (in) |
1065 | A pointer to the raw encoded FLAC data. |
1066 | |
1067 | dataSize (in) |
1068 | The size in bytes of `data`. |
1069 | |
1070 | pAllocationCallbacks (in) |
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 | 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. |
1082 | |
1083 | |
1084 | See Also |
1085 | -------- |
1086 | drflac_open() |
1087 | drflac_close() |
1088 | */ |
1089 | DRFLAC_API drflac* drflac_open_memory(const void* pData, size_t dataSize, const drflac_allocation_callbacks* pAllocationCallbacks); |
1090 | |
1091 | /* |
1092 | Opens a FLAC decoder from a pre-allocated block of memory and notifies the caller of the metadata chunks (album art, etc.) |
1093 | |
1094 | |
1095 | Parameters |
1096 | ---------- |
1097 | pData (in) |
1098 | A pointer to the raw encoded FLAC data. |
1099 | |
1100 | dataSize (in) |
1101 | The size in bytes of `data`. |
1102 | |
1103 | onMeta (in) |
1104 | The callback to fire for each metadata block. |
1105 | |
1106 | pUserData (in) |
1107 | A pointer to the user data to pass to the metadata callback. |
1108 | |
1109 | pAllocationCallbacks (in) |
1110 | A pointer to application defined callbacks for managing memory allocations. |
1111 | |
1112 | |
1113 | Remarks |
1114 | ------- |
1115 | Look at the documentation for drflac_open_with_metadata() for more information on how metadata is handled. |
1116 | |
1117 | |
1118 | See Also |
1119 | ------- |
1120 | drflac_open_with_metadata() |
1121 | drflac_open() |
1122 | drflac_close() |
1123 | */ |
1124 | 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); |
1125 | |
1126 | |
1127 | |
1128 | /* High Level APIs */ |
1129 | |
1130 | /* |
1131 | Opens a FLAC stream from the given callbacks and fully decodes it in a single operation. The return value is a |
1132 | pointer to the sample data as interleaved signed 32-bit PCM. The returned data must be freed with drflac_free(). |
1133 | |
1134 | You can pass in custom memory allocation callbacks via the pAllocationCallbacks parameter. This can be NULL in which |
1135 | case it will use DRFLAC_MALLOC, DRFLAC_REALLOC and DRFLAC_FREE. |
1136 | |
1137 | Sometimes a FLAC file won't keep track of the total sample count. In this situation the function will continuously |
1138 | read samples into a dynamically sized buffer on the heap until no samples are left. |
1139 | |
1140 | Do not call this function on a broadcast type of stream (like internet radio streams and whatnot). |
1141 | */ |
1142 | 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); |
1143 | |
1144 | /* Same as drflac_open_and_read_pcm_frames_s32(), except returns signed 16-bit integer samples. */ |
1145 | 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); |
1146 | |
1147 | /* Same as drflac_open_and_read_pcm_frames_s32(), except returns 32-bit floating-point samples. */ |
1148 | 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); |
1149 | |
2ff0b512 |
1150 | /* Same as drflac_open_and_read_pcm_frames_s32() except opens the decoder from a block of memory. */ |
1151 | 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); |
1152 | |
1153 | /* Same as drflac_open_memory_and_read_pcm_frames_s32(), except returns signed 16-bit integer samples. */ |
1154 | 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); |
1155 | |
1156 | /* Same as drflac_open_memory_and_read_pcm_frames_s32(), except returns 32-bit floating-point samples. */ |
1157 | 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); |
1158 | |
1159 | /* |
1160 | Frees memory that was allocated internally by dr_flac. |
1161 | |
1162 | 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. |
1163 | */ |
1164 | DRFLAC_API void drflac_free(void* p, const drflac_allocation_callbacks* pAllocationCallbacks); |
1165 | |
1166 | |
1167 | /* Structure representing an iterator for vorbis comments in a VORBIS_COMMENT metadata block. */ |
1168 | typedef struct |
1169 | { |
1170 | drflac_uint32 countRemaining; |
1171 | const char* pRunningData; |
1172 | } drflac_vorbis_comment_iterator; |
1173 | |
1174 | /* |
1175 | Initializes a vorbis comment iterator. This can be used for iterating over the vorbis comments in a VORBIS_COMMENT |
1176 | metadata block. |
1177 | */ |
1178 | DRFLAC_API void drflac_init_vorbis_comment_iterator(drflac_vorbis_comment_iterator* pIter, drflac_uint32 commentCount, const void* pComments); |
1179 | |
1180 | /* |
1181 | Goes to the next vorbis comment in the given iterator. If null is returned it means there are no more comments. The |
1182 | returned string is NOT null terminated. |
1183 | */ |
1184 | DRFLAC_API const char* drflac_next_vorbis_comment(drflac_vorbis_comment_iterator* pIter, drflac_uint32* pCommentLengthOut); |
1185 | |
1186 | |
1187 | /* Structure representing an iterator for cuesheet tracks in a CUESHEET metadata block. */ |
1188 | typedef struct |
1189 | { |
1190 | drflac_uint32 countRemaining; |
1191 | const char* pRunningData; |
1192 | } drflac_cuesheet_track_iterator; |
1193 | |
1194 | /* Packing is important on this structure because we map this directly to the raw data within the CUESHEET metadata block. */ |
1195 | #pragma pack(4) |
1196 | typedef struct |
1197 | { |
1198 | drflac_uint64 offset; |
1199 | drflac_uint8 index; |
1200 | drflac_uint8 reserved[3]; |
1201 | } drflac_cuesheet_track_index; |
1202 | #pragma pack() |
1203 | |
1204 | typedef struct |
1205 | { |
1206 | drflac_uint64 offset; |
1207 | drflac_uint8 trackNumber; |
1208 | char ISRC[12]; |
1209 | drflac_bool8 isAudio; |
1210 | drflac_bool8 preEmphasis; |
1211 | drflac_uint8 indexCount; |
1212 | const drflac_cuesheet_track_index* pIndexPoints; |
1213 | } drflac_cuesheet_track; |
1214 | |
1215 | /* |
1216 | Initializes a cuesheet track iterator. This can be used for iterating over the cuesheet tracks in a CUESHEET metadata |
1217 | block. |
1218 | */ |
1219 | DRFLAC_API void drflac_init_cuesheet_track_iterator(drflac_cuesheet_track_iterator* pIter, drflac_uint32 trackCount, const void* pTrackData); |
1220 | |
1221 | /* Goes to the next cuesheet track in the given iterator. If DRFLAC_FALSE is returned it means there are no more comments. */ |
1222 | DRFLAC_API drflac_bool32 drflac_next_cuesheet_track(drflac_cuesheet_track_iterator* pIter, drflac_cuesheet_track* pCuesheetTrack); |
1223 | |
1224 | |
1225 | #ifdef __cplusplus |
1226 | } |
1227 | #endif |
1228 | #endif /* dr_flac_h */ |
1229 | |
1230 | |
1231 | /************************************************************************************************************************************************************ |
1232 | ************************************************************************************************************************************************************ |
1233 | |
1234 | IMPLEMENTATION |
1235 | |
1236 | ************************************************************************************************************************************************************ |
1237 | ************************************************************************************************************************************************************/ |
1238 | #if defined(DR_FLAC_IMPLEMENTATION) || defined(DRFLAC_IMPLEMENTATION) |
1239 | #ifndef dr_flac_c |
1240 | #define dr_flac_c |
1241 | |
1242 | /* Disable some annoying warnings. */ |
1243 | #if defined(__clang__) || (defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6))) |
1244 | #pragma GCC diagnostic push |
1245 | #if __GNUC__ >= 7 |
1246 | #pragma GCC diagnostic ignored "-Wimplicit-fallthrough" |
1247 | #endif |
1248 | #endif |
1249 | |
1250 | #ifdef __linux__ |
1251 | #ifndef _BSD_SOURCE |
1252 | #define _BSD_SOURCE |
1253 | #endif |
1254 | #ifndef _DEFAULT_SOURCE |
1255 | #define _DEFAULT_SOURCE |
1256 | #endif |
1257 | #ifndef __USE_BSD |
1258 | #define __USE_BSD |
1259 | #endif |
1260 | #include <endian.h> |
1261 | #endif |
1262 | |
1263 | #include <stdlib.h> |
1264 | #include <string.h> |
1265 | |
1266 | #ifdef _MSC_VER |
1267 | #define DRFLAC_INLINE __forceinline |
1268 | #elif defined(__GNUC__) |
1269 | /* |
1270 | I've had a bug report where GCC is emitting warnings about functions possibly not being inlineable. This warning happens when |
1271 | the __attribute__((always_inline)) attribute is defined without an "inline" statement. I think therefore there must be some |
1272 | case where "__inline__" is not always defined, thus the compiler emitting these warnings. When using -std=c89 or -ansi on the |
1273 | command line, we cannot use the "inline" keyword and instead need to use "__inline__". In an attempt to work around this issue |
1274 | I am using "__inline__" only when we're compiling in strict ANSI mode. |
1275 | */ |
1276 | #if defined(__STRICT_ANSI__) |
1277 | #define DRFLAC_INLINE __inline__ __attribute__((always_inline)) |
1278 | #else |
1279 | #define DRFLAC_INLINE inline __attribute__((always_inline)) |
1280 | #endif |
1281 | #elif defined(__WATCOMC__) |
1282 | #define DRFLAC_INLINE __inline |
1283 | #else |
1284 | #define DRFLAC_INLINE |
1285 | #endif |
1286 | |
1287 | /* CPU architecture. */ |
1288 | #if defined(__x86_64__) || defined(_M_X64) |
1289 | #define DRFLAC_X64 |
1290 | #elif defined(__i386) || defined(_M_IX86) |
1291 | #define DRFLAC_X86 |
1292 | #elif defined(__arm__) || defined(_M_ARM) || defined(_M_ARM64) |
1293 | #define DRFLAC_ARM |
1294 | #endif |
1295 | |
1296 | /* |
1297 | Intrinsics Support |
1298 | |
1299 | 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 |
1300 | |
1301 | "error: shift must be an immediate" |
1302 | |
1303 | Unfortuantely dr_flac depends on this for a few things so we're just going to disable SSE on GCC 4.2 and below. |
1304 | */ |
1305 | #if !defined(DR_FLAC_NO_SIMD) |
1306 | #if defined(DRFLAC_X64) || defined(DRFLAC_X86) |
1307 | #if defined(_MSC_VER) && !defined(__clang__) |
1308 | /* MSVC. */ |
1309 | #if _MSC_VER >= 1400 && !defined(DRFLAC_NO_SSE2) /* 2005 */ |
1310 | #define DRFLAC_SUPPORT_SSE2 |
1311 | #endif |
1312 | #if _MSC_VER >= 1600 && !defined(DRFLAC_NO_SSE41) /* 2010 */ |
1313 | #define DRFLAC_SUPPORT_SSE41 |
1314 | #endif |
1315 | #elif defined(__clang__) || (defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3))) |
1316 | /* Assume GNUC-style. */ |
1317 | #if defined(__SSE2__) && !defined(DRFLAC_NO_SSE2) |
1318 | #define DRFLAC_SUPPORT_SSE2 |
1319 | #endif |
1320 | #if defined(__SSE4_1__) && !defined(DRFLAC_NO_SSE41) |
1321 | #define DRFLAC_SUPPORT_SSE41 |
1322 | #endif |
1323 | #endif |
1324 | |
1325 | /* If at this point we still haven't determined compiler support for the intrinsics just fall back to __has_include. */ |
1326 | #if !defined(__GNUC__) && !defined(__clang__) && defined(__has_include) |
1327 | #if !defined(DRFLAC_SUPPORT_SSE2) && !defined(DRFLAC_NO_SSE2) && __has_include(<emmintrin.h>) |
1328 | #define DRFLAC_SUPPORT_SSE2 |
1329 | #endif |
1330 | #if !defined(DRFLAC_SUPPORT_SSE41) && !defined(DRFLAC_NO_SSE41) && __has_include(<smmintrin.h>) |
1331 | #define DRFLAC_SUPPORT_SSE41 |
1332 | #endif |
1333 | #endif |
1334 | |
1335 | #if defined(DRFLAC_SUPPORT_SSE41) |
1336 | #include <smmintrin.h> |
1337 | #elif defined(DRFLAC_SUPPORT_SSE2) |
1338 | #include <emmintrin.h> |
1339 | #endif |
1340 | #endif |
1341 | |
1342 | #if defined(DRFLAC_ARM) |
1343 | #if !defined(DRFLAC_NO_NEON) && (defined(__ARM_NEON) || defined(__aarch64__) || defined(_M_ARM64)) |
1344 | #define DRFLAC_SUPPORT_NEON |
1345 | #endif |
1346 | |
1347 | /* Fall back to looking for the #include file. */ |
1348 | #if !defined(__GNUC__) && !defined(__clang__) && defined(__has_include) |
1349 | #if !defined(DRFLAC_SUPPORT_NEON) && !defined(DRFLAC_NO_NEON) && __has_include(<arm_neon.h>) |
1350 | #define DRFLAC_SUPPORT_NEON |
1351 | #endif |
1352 | #endif |
1353 | |
1354 | #if defined(DRFLAC_SUPPORT_NEON) |
1355 | #include <arm_neon.h> |
1356 | #endif |
1357 | #endif |
1358 | #endif |
1359 | |
1360 | /* Compile-time CPU feature support. */ |
1361 | #if !defined(DR_FLAC_NO_SIMD) && (defined(DRFLAC_X86) || defined(DRFLAC_X64)) |
1362 | #if defined(_MSC_VER) && !defined(__clang__) |
1363 | #if _MSC_VER >= 1400 |
1364 | #include <intrin.h> |
1365 | static void drflac__cpuid(int info[4], int fid) |
1366 | { |
1367 | __cpuid(info, fid); |
1368 | } |
1369 | #else |
1370 | #define DRFLAC_NO_CPUID |
1371 | #endif |
1372 | #else |
1373 | #if defined(__GNUC__) || defined(__clang__) |
1374 | static void drflac__cpuid(int info[4], int fid) |
1375 | { |
1376 | /* |
1377 | 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 |
1378 | 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 |
1379 | supporting different assembly dialects. |
1380 | |
1381 | What's basically happening is that we're saving and restoring the ebx register manually. |
1382 | */ |
1383 | #if defined(DRFLAC_X86) && defined(__PIC__) |
1384 | __asm__ __volatile__ ( |
1385 | "xchg{l} {%%}ebx, %k1;" |
1386 | "cpuid;" |
1387 | "xchg{l} {%%}ebx, %k1;" |
1388 | : "=a"(info[0]), "=&r"(info[1]), "=c"(info[2]), "=d"(info[3]) : "a"(fid), "c"(0) |
1389 | ); |
1390 | #else |
1391 | __asm__ __volatile__ ( |
1392 | "cpuid" : "=a"(info[0]), "=b"(info[1]), "=c"(info[2]), "=d"(info[3]) : "a"(fid), "c"(0) |
1393 | ); |
1394 | #endif |
1395 | } |
1396 | #else |
1397 | #define DRFLAC_NO_CPUID |
1398 | #endif |
1399 | #endif |
1400 | #else |
1401 | #define DRFLAC_NO_CPUID |
1402 | #endif |
1403 | |
1404 | static DRFLAC_INLINE drflac_bool32 drflac_has_sse2(void) |
1405 | { |
1406 | #if defined(DRFLAC_SUPPORT_SSE2) |
1407 | #if (defined(DRFLAC_X64) || defined(DRFLAC_X86)) && !defined(DRFLAC_NO_SSE2) |
1408 | #if defined(DRFLAC_X64) |
1409 | return DRFLAC_TRUE; /* 64-bit targets always support SSE2. */ |
1410 | #elif (defined(_M_IX86_FP) && _M_IX86_FP == 2) || defined(__SSE2__) |
1411 | return DRFLAC_TRUE; /* If the compiler is allowed to freely generate SSE2 code we can assume support. */ |
1412 | #else |
1413 | #if defined(DRFLAC_NO_CPUID) |
1414 | return DRFLAC_FALSE; |
1415 | #else |
1416 | int info[4]; |
1417 | drflac__cpuid(info, 1); |
1418 | return (info[3] & (1 << 26)) != 0; |
1419 | #endif |
1420 | #endif |
1421 | #else |
1422 | return DRFLAC_FALSE; /* SSE2 is only supported on x86 and x64 architectures. */ |
1423 | #endif |
1424 | #else |
1425 | return DRFLAC_FALSE; /* No compiler support. */ |
1426 | #endif |
1427 | } |
1428 | |
1429 | static DRFLAC_INLINE drflac_bool32 drflac_has_sse41(void) |
1430 | { |
1431 | #if defined(DRFLAC_SUPPORT_SSE41) |
1432 | #if (defined(DRFLAC_X64) || defined(DRFLAC_X86)) && !defined(DRFLAC_NO_SSE41) |
1433 | #if defined(DRFLAC_X64) |
1434 | return DRFLAC_TRUE; /* 64-bit targets always support SSE4.1. */ |
1435 | #elif (defined(_M_IX86_FP) && _M_IX86_FP == 2) || defined(__SSE4_1__) |
1436 | return DRFLAC_TRUE; /* If the compiler is allowed to freely generate SSE41 code we can assume support. */ |
1437 | #else |
1438 | #if defined(DRFLAC_NO_CPUID) |
1439 | return DRFLAC_FALSE; |
1440 | #else |
1441 | int info[4]; |
1442 | drflac__cpuid(info, 1); |
1443 | return (info[2] & (1 << 19)) != 0; |
1444 | #endif |
1445 | #endif |
1446 | #else |
1447 | return DRFLAC_FALSE; /* SSE41 is only supported on x86 and x64 architectures. */ |
1448 | #endif |
1449 | #else |
1450 | return DRFLAC_FALSE; /* No compiler support. */ |
1451 | #endif |
1452 | } |
1453 | |
1454 | |
1455 | #if defined(_MSC_VER) && _MSC_VER >= 1500 && (defined(DRFLAC_X86) || defined(DRFLAC_X64)) && !defined(__clang__) |
1456 | #define DRFLAC_HAS_LZCNT_INTRINSIC |
1457 | #elif (defined(__GNUC__) && ((__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 7))) |
1458 | #define DRFLAC_HAS_LZCNT_INTRINSIC |
1459 | #elif defined(__clang__) |
1460 | #if defined(__has_builtin) |
1461 | #if __has_builtin(__builtin_clzll) || __has_builtin(__builtin_clzl) |
1462 | #define DRFLAC_HAS_LZCNT_INTRINSIC |
1463 | #endif |
1464 | #endif |
1465 | #endif |
1466 | |
1467 | #if defined(_MSC_VER) && _MSC_VER >= 1400 && !defined(__clang__) |
1468 | #define DRFLAC_HAS_BYTESWAP16_INTRINSIC |
1469 | #define DRFLAC_HAS_BYTESWAP32_INTRINSIC |
1470 | #define DRFLAC_HAS_BYTESWAP64_INTRINSIC |
1471 | #elif defined(__clang__) |
1472 | #if defined(__has_builtin) |
1473 | #if __has_builtin(__builtin_bswap16) |
1474 | #define DRFLAC_HAS_BYTESWAP16_INTRINSIC |
1475 | #endif |
1476 | #if __has_builtin(__builtin_bswap32) |
1477 | #define DRFLAC_HAS_BYTESWAP32_INTRINSIC |
1478 | #endif |
1479 | #if __has_builtin(__builtin_bswap64) |
1480 | #define DRFLAC_HAS_BYTESWAP64_INTRINSIC |
1481 | #endif |
1482 | #endif |
1483 | #elif defined(__GNUC__) |
1484 | #if ((__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)) |
1485 | #define DRFLAC_HAS_BYTESWAP32_INTRINSIC |
1486 | #define DRFLAC_HAS_BYTESWAP64_INTRINSIC |
1487 | #endif |
1488 | #if ((__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8)) |
1489 | #define DRFLAC_HAS_BYTESWAP16_INTRINSIC |
1490 | #endif |
1491 | #endif |
1492 | |
1493 | |
1494 | /* Standard library stuff. */ |
1495 | #ifndef DRFLAC_ASSERT |
1496 | #include <assert.h> |
1497 | #define DRFLAC_ASSERT(expression) assert(expression) |
1498 | #endif |
1499 | #ifndef DRFLAC_MALLOC |
1500 | #define DRFLAC_MALLOC(sz) malloc((sz)) |
1501 | #endif |
1502 | #ifndef DRFLAC_REALLOC |
1503 | #define DRFLAC_REALLOC(p, sz) realloc((p), (sz)) |
1504 | #endif |
1505 | #ifndef DRFLAC_FREE |
1506 | #define DRFLAC_FREE(p) free((p)) |
1507 | #endif |
1508 | #ifndef DRFLAC_COPY_MEMORY |
1509 | #define DRFLAC_COPY_MEMORY(dst, src, sz) memcpy((dst), (src), (sz)) |
1510 | #endif |
1511 | #ifndef DRFLAC_ZERO_MEMORY |
1512 | #define DRFLAC_ZERO_MEMORY(p, sz) memset((p), 0, (sz)) |
1513 | #endif |
1514 | #ifndef DRFLAC_ZERO_OBJECT |
1515 | #define DRFLAC_ZERO_OBJECT(p) DRFLAC_ZERO_MEMORY((p), sizeof(*(p))) |
1516 | #endif |
1517 | |
1518 | #define DRFLAC_MAX_SIMD_VECTOR_SIZE 64 /* 64 for AVX-512 in the future. */ |
1519 | |
1520 | typedef drflac_int32 drflac_result; |
1521 | #define DRFLAC_SUCCESS 0 |
1522 | #define DRFLAC_ERROR -1 /* A generic error. */ |
1523 | #define DRFLAC_INVALID_ARGS -2 |
1524 | #define DRFLAC_INVALID_OPERATION -3 |
1525 | #define DRFLAC_OUT_OF_MEMORY -4 |
1526 | #define DRFLAC_OUT_OF_RANGE -5 |
1527 | #define DRFLAC_ACCESS_DENIED -6 |
1528 | #define DRFLAC_DOES_NOT_EXIST -7 |
1529 | #define DRFLAC_ALREADY_EXISTS -8 |
1530 | #define DRFLAC_TOO_MANY_OPEN_FILES -9 |
1531 | #define DRFLAC_INVALID_FILE -10 |
1532 | #define DRFLAC_TOO_BIG -11 |
1533 | #define DRFLAC_PATH_TOO_LONG -12 |
1534 | #define DRFLAC_NAME_TOO_LONG -13 |
1535 | #define DRFLAC_NOT_DIRECTORY -14 |
1536 | #define DRFLAC_IS_DIRECTORY -15 |
1537 | #define DRFLAC_DIRECTORY_NOT_EMPTY -16 |
1538 | #define DRFLAC_END_OF_FILE -17 |
1539 | #define DRFLAC_NO_SPACE -18 |
1540 | #define DRFLAC_BUSY -19 |
1541 | #define DRFLAC_IO_ERROR -20 |
1542 | #define DRFLAC_INTERRUPT -21 |
1543 | #define DRFLAC_UNAVAILABLE -22 |
1544 | #define DRFLAC_ALREADY_IN_USE -23 |
1545 | #define DRFLAC_BAD_ADDRESS -24 |
1546 | #define DRFLAC_BAD_SEEK -25 |
1547 | #define DRFLAC_BAD_PIPE -26 |
1548 | #define DRFLAC_DEADLOCK -27 |
1549 | #define DRFLAC_TOO_MANY_LINKS -28 |
1550 | #define DRFLAC_NOT_IMPLEMENTED -29 |
1551 | #define DRFLAC_NO_MESSAGE -30 |
1552 | #define DRFLAC_BAD_MESSAGE -31 |
1553 | #define DRFLAC_NO_DATA_AVAILABLE -32 |
1554 | #define DRFLAC_INVALID_DATA -33 |
1555 | #define DRFLAC_TIMEOUT -34 |
1556 | #define DRFLAC_NO_NETWORK -35 |
1557 | #define DRFLAC_NOT_UNIQUE -36 |
1558 | #define DRFLAC_NOT_SOCKET -37 |
1559 | #define DRFLAC_NO_ADDRESS -38 |
1560 | #define DRFLAC_BAD_PROTOCOL -39 |
1561 | #define DRFLAC_PROTOCOL_UNAVAILABLE -40 |
1562 | #define DRFLAC_PROTOCOL_NOT_SUPPORTED -41 |
1563 | #define DRFLAC_PROTOCOL_FAMILY_NOT_SUPPORTED -42 |
1564 | #define DRFLAC_ADDRESS_FAMILY_NOT_SUPPORTED -43 |
1565 | #define DRFLAC_SOCKET_NOT_SUPPORTED -44 |
1566 | #define DRFLAC_CONNECTION_RESET -45 |
1567 | #define DRFLAC_ALREADY_CONNECTED -46 |
1568 | #define DRFLAC_NOT_CONNECTED -47 |
1569 | #define DRFLAC_CONNECTION_REFUSED -48 |
1570 | #define DRFLAC_NO_HOST -49 |
1571 | #define DRFLAC_IN_PROGRESS -50 |
1572 | #define DRFLAC_CANCELLED -51 |
1573 | #define DRFLAC_MEMORY_ALREADY_MAPPED -52 |
1574 | #define DRFLAC_AT_END -53 |
1575 | #define DRFLAC_CRC_MISMATCH -128 |
1576 | |
1577 | #define DRFLAC_SUBFRAME_CONSTANT 0 |
1578 | #define DRFLAC_SUBFRAME_VERBATIM 1 |
1579 | #define DRFLAC_SUBFRAME_FIXED 8 |
1580 | #define DRFLAC_SUBFRAME_LPC 32 |
1581 | #define DRFLAC_SUBFRAME_RESERVED 255 |
1582 | |
1583 | #define DRFLAC_RESIDUAL_CODING_METHOD_PARTITIONED_RICE 0 |
1584 | #define DRFLAC_RESIDUAL_CODING_METHOD_PARTITIONED_RICE2 1 |
1585 | |
1586 | #define DRFLAC_CHANNEL_ASSIGNMENT_INDEPENDENT 0 |
1587 | #define DRFLAC_CHANNEL_ASSIGNMENT_LEFT_SIDE 8 |
1588 | #define DRFLAC_CHANNEL_ASSIGNMENT_RIGHT_SIDE 9 |
1589 | #define DRFLAC_CHANNEL_ASSIGNMENT_MID_SIDE 10 |
1590 | |
1591 | #define drflac_align(x, a) ((((x) + (a) - 1) / (a)) * (a)) |
1592 | |
1593 | |
1594 | DRFLAC_API void drflac_version(drflac_uint32* pMajor, drflac_uint32* pMinor, drflac_uint32* pRevision) |
1595 | { |
1596 | if (pMajor) { |
1597 | *pMajor = DRFLAC_VERSION_MAJOR; |
1598 | } |
1599 | |
1600 | if (pMinor) { |
1601 | *pMinor = DRFLAC_VERSION_MINOR; |
1602 | } |
1603 | |
1604 | if (pRevision) { |
1605 | *pRevision = DRFLAC_VERSION_REVISION; |
1606 | } |
1607 | } |
1608 | |
1609 | DRFLAC_API const char* drflac_version_string(void) |
1610 | { |
1611 | return DRFLAC_VERSION_STRING; |
1612 | } |
1613 | |
1614 | |
1615 | /* CPU caps. */ |
1616 | #if defined(__has_feature) |
1617 | #if __has_feature(thread_sanitizer) |
1618 | #define DRFLAC_NO_THREAD_SANITIZE __attribute__((no_sanitize("thread"))) |
1619 | #else |
1620 | #define DRFLAC_NO_THREAD_SANITIZE |
1621 | #endif |
1622 | #else |
1623 | #define DRFLAC_NO_THREAD_SANITIZE |
1624 | #endif |
1625 | |
1626 | #if defined(DRFLAC_HAS_LZCNT_INTRINSIC) |
1627 | static drflac_bool32 drflac__gIsLZCNTSupported = DRFLAC_FALSE; |
1628 | #endif |
1629 | |
1630 | #ifndef DRFLAC_NO_CPUID |
1631 | static drflac_bool32 drflac__gIsSSE2Supported = DRFLAC_FALSE; |
1632 | static drflac_bool32 drflac__gIsSSE41Supported = DRFLAC_FALSE; |
1633 | |
1634 | /* |
1635 | I've had a bug report that Clang's ThreadSanitizer presents a warning in this function. Having reviewed this, this does |
1636 | actually make sense. However, since CPU caps should never differ for a running process, I don't think the trade off of |
1637 | complicating internal API's by passing around CPU caps versus just disabling the warnings is worthwhile. I'm therefore |
1638 | just going to disable these warnings. This is disabled via the DRFLAC_NO_THREAD_SANITIZE attribute. |
1639 | */ |
1640 | DRFLAC_NO_THREAD_SANITIZE static void drflac__init_cpu_caps(void) |
1641 | { |
1642 | static drflac_bool32 isCPUCapsInitialized = DRFLAC_FALSE; |
1643 | |
1644 | if (!isCPUCapsInitialized) { |
1645 | /* LZCNT */ |
1646 | #if defined(DRFLAC_HAS_LZCNT_INTRINSIC) |
1647 | int info[4] = {0}; |
1648 | drflac__cpuid(info, 0x80000001); |
1649 | drflac__gIsLZCNTSupported = (info[2] & (1 << 5)) != 0; |
1650 | #endif |
1651 | |
1652 | /* SSE2 */ |
1653 | drflac__gIsSSE2Supported = drflac_has_sse2(); |
1654 | |
1655 | /* SSE4.1 */ |
1656 | drflac__gIsSSE41Supported = drflac_has_sse41(); |
1657 | |
1658 | /* Initialized. */ |
1659 | isCPUCapsInitialized = DRFLAC_TRUE; |
1660 | } |
1661 | } |
1662 | #else |
1663 | static drflac_bool32 drflac__gIsNEONSupported = DRFLAC_FALSE; |
1664 | |
1665 | static DRFLAC_INLINE drflac_bool32 drflac__has_neon(void) |
1666 | { |
1667 | #if defined(DRFLAC_SUPPORT_NEON) |
1668 | #if defined(DRFLAC_ARM) && !defined(DRFLAC_NO_NEON) |
1669 | #if (defined(__ARM_NEON) || defined(__aarch64__) || defined(_M_ARM64)) |
1670 | return DRFLAC_TRUE; /* If the compiler is allowed to freely generate NEON code we can assume support. */ |
1671 | #else |
1672 | /* TODO: Runtime check. */ |
1673 | return DRFLAC_FALSE; |
1674 | #endif |
1675 | #else |
1676 | return DRFLAC_FALSE; /* NEON is only supported on ARM architectures. */ |
1677 | #endif |
1678 | #else |
1679 | return DRFLAC_FALSE; /* No compiler support. */ |
1680 | #endif |
1681 | } |
1682 | |
1683 | DRFLAC_NO_THREAD_SANITIZE static void drflac__init_cpu_caps(void) |
1684 | { |
1685 | drflac__gIsNEONSupported = drflac__has_neon(); |
1686 | |
1687 | #if defined(DRFLAC_HAS_LZCNT_INTRINSIC) && defined(DRFLAC_ARM) && (defined(__ARM_ARCH) && __ARM_ARCH >= 5) |
1688 | drflac__gIsLZCNTSupported = DRFLAC_TRUE; |
1689 | #endif |
1690 | } |
1691 | #endif |
1692 | |
1693 | |
1694 | /* Endian Management */ |
1695 | static DRFLAC_INLINE drflac_bool32 drflac__is_little_endian(void) |
1696 | { |
1697 | #if defined(DRFLAC_X86) || defined(DRFLAC_X64) |
1698 | return DRFLAC_TRUE; |
1699 | #elif defined(__BYTE_ORDER) && defined(__LITTLE_ENDIAN) && __BYTE_ORDER == __LITTLE_ENDIAN |
1700 | return DRFLAC_TRUE; |
1701 | #else |
1702 | int n = 1; |
1703 | return (*(char*)&n) == 1; |
1704 | #endif |
1705 | } |
1706 | |
1707 | static DRFLAC_INLINE drflac_uint16 drflac__swap_endian_uint16(drflac_uint16 n) |
1708 | { |
1709 | #ifdef DRFLAC_HAS_BYTESWAP16_INTRINSIC |
1710 | #if defined(_MSC_VER) && !defined(__clang__) |
1711 | return _byteswap_ushort(n); |
1712 | #elif defined(__GNUC__) || defined(__clang__) |
1713 | return __builtin_bswap16(n); |
1714 | #else |
1715 | #error "This compiler does not support the byte swap intrinsic." |
1716 | #endif |
1717 | #else |
1718 | return ((n & 0xFF00) >> 8) | |
1719 | ((n & 0x00FF) << 8); |
1720 | #endif |
1721 | } |
1722 | |
1723 | static DRFLAC_INLINE drflac_uint32 drflac__swap_endian_uint32(drflac_uint32 n) |
1724 | { |
1725 | #ifdef DRFLAC_HAS_BYTESWAP32_INTRINSIC |
1726 | #if defined(_MSC_VER) && !defined(__clang__) |
1727 | return _byteswap_ulong(n); |
1728 | #elif defined(__GNUC__) || defined(__clang__) |
1729 | #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. */ |
1730 | /* Inline assembly optimized implementation for ARM. In my testing, GCC does not generate optimized code with __builtin_bswap32(). */ |
1731 | drflac_uint32 r; |
1732 | __asm__ __volatile__ ( |
1733 | #if defined(DRFLAC_64BIT) |
1734 | "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! */ |
1735 | #else |
1736 | "rev %[out], %[in]" : [out]"=r"(r) : [in]"r"(n) |
1737 | #endif |
1738 | ); |
1739 | return r; |
1740 | #else |
1741 | return __builtin_bswap32(n); |
1742 | #endif |
1743 | #else |
1744 | #error "This compiler does not support the byte swap intrinsic." |
1745 | #endif |
1746 | #else |
1747 | return ((n & 0xFF000000) >> 24) | |
1748 | ((n & 0x00FF0000) >> 8) | |
1749 | ((n & 0x0000FF00) << 8) | |
1750 | ((n & 0x000000FF) << 24); |
1751 | #endif |
1752 | } |
1753 | |
1754 | static DRFLAC_INLINE drflac_uint64 drflac__swap_endian_uint64(drflac_uint64 n) |
1755 | { |
1756 | #ifdef DRFLAC_HAS_BYTESWAP64_INTRINSIC |
1757 | #if defined(_MSC_VER) && !defined(__clang__) |
1758 | return _byteswap_uint64(n); |
1759 | #elif defined(__GNUC__) || defined(__clang__) |
1760 | return __builtin_bswap64(n); |
1761 | #else |
1762 | #error "This compiler does not support the byte swap intrinsic." |
1763 | #endif |
1764 | #else |
1765 | /* Weird "<< 32" bitshift is required for C89 because it doesn't support 64-bit constants. Should be optimized out by a good compiler. */ |
1766 | return ((n & ((drflac_uint64)0xFF000000 << 32)) >> 56) | |
1767 | ((n & ((drflac_uint64)0x00FF0000 << 32)) >> 40) | |
1768 | ((n & ((drflac_uint64)0x0000FF00 << 32)) >> 24) | |
1769 | ((n & ((drflac_uint64)0x000000FF << 32)) >> 8) | |
1770 | ((n & ((drflac_uint64)0xFF000000 )) << 8) | |
1771 | ((n & ((drflac_uint64)0x00FF0000 )) << 24) | |
1772 | ((n & ((drflac_uint64)0x0000FF00 )) << 40) | |
1773 | ((n & ((drflac_uint64)0x000000FF )) << 56); |
1774 | #endif |
1775 | } |
1776 | |
1777 | |
1778 | static DRFLAC_INLINE drflac_uint16 drflac__be2host_16(drflac_uint16 n) |
1779 | { |
1780 | if (drflac__is_little_endian()) { |
1781 | return drflac__swap_endian_uint16(n); |
1782 | } |
1783 | |
1784 | return n; |
1785 | } |
1786 | |
1787 | static DRFLAC_INLINE drflac_uint32 drflac__be2host_32(drflac_uint32 n) |
1788 | { |
1789 | if (drflac__is_little_endian()) { |
1790 | return drflac__swap_endian_uint32(n); |
1791 | } |
1792 | |
1793 | return n; |
1794 | } |
1795 | |
1796 | static DRFLAC_INLINE drflac_uint64 drflac__be2host_64(drflac_uint64 n) |
1797 | { |
1798 | if (drflac__is_little_endian()) { |
1799 | return drflac__swap_endian_uint64(n); |
1800 | } |
1801 | |
1802 | return n; |
1803 | } |
1804 | |
1805 | |
1806 | static DRFLAC_INLINE drflac_uint32 drflac__le2host_32(drflac_uint32 n) |
1807 | { |
1808 | if (!drflac__is_little_endian()) { |
1809 | return drflac__swap_endian_uint32(n); |
1810 | } |
1811 | |
1812 | return n; |
1813 | } |
1814 | |
1815 | |
1816 | static DRFLAC_INLINE drflac_uint32 drflac__unsynchsafe_32(drflac_uint32 n) |
1817 | { |
1818 | drflac_uint32 result = 0; |
1819 | result |= (n & 0x7F000000) >> 3; |
1820 | result |= (n & 0x007F0000) >> 2; |
1821 | result |= (n & 0x00007F00) >> 1; |
1822 | result |= (n & 0x0000007F) >> 0; |
1823 | |
1824 | return result; |
1825 | } |
1826 | |
1827 | |
1828 | |
1829 | /* The CRC code below is based on this document: http://zlib.net/crc_v3.txt */ |
1830 | static drflac_uint8 drflac__crc8_table[] = { |
1831 | 0x00, 0x07, 0x0E, 0x09, 0x1C, 0x1B, 0x12, 0x15, 0x38, 0x3F, 0x36, 0x31, 0x24, 0x23, 0x2A, 0x2D, |
1832 | 0x70, 0x77, 0x7E, 0x79, 0x6C, 0x6B, 0x62, 0x65, 0x48, 0x4F, 0x46, 0x41, 0x54, 0x53, 0x5A, 0x5D, |
1833 | 0xE0, 0xE7, 0xEE, 0xE9, 0xFC, 0xFB, 0xF2, 0xF5, 0xD8, 0xDF, 0xD6, 0xD1, 0xC4, 0xC3, 0xCA, 0xCD, |
1834 | 0x90, 0x97, 0x9E, 0x99, 0x8C, 0x8B, 0x82, 0x85, 0xA8, 0xAF, 0xA6, 0xA1, 0xB4, 0xB3, 0xBA, 0xBD, |
1835 | 0xC7, 0xC0, 0xC9, 0xCE, 0xDB, 0xDC, 0xD5, 0xD2, 0xFF, 0xF8, 0xF1, 0xF6, 0xE3, 0xE4, 0xED, 0xEA, |
1836 | 0xB7, 0xB0, 0xB9, 0xBE, 0xAB, 0xAC, 0xA5, 0xA2, 0x8F, 0x88, 0x81, 0x86, 0x93, 0x94, 0x9D, 0x9A, |
1837 | 0x27, 0x20, 0x29, 0x2E, 0x3B, 0x3C, 0x35, 0x32, 0x1F, 0x18, 0x11, 0x16, 0x03, 0x04, 0x0D, 0x0A, |
1838 | 0x57, 0x50, 0x59, 0x5E, 0x4B, 0x4C, 0x45, 0x42, 0x6F, 0x68, 0x61, 0x66, 0x73, 0x74, 0x7D, 0x7A, |
1839 | 0x89, 0x8E, 0x87, 0x80, 0x95, 0x92, 0x9B, 0x9C, 0xB1, 0xB6, 0xBF, 0xB8, 0xAD, 0xAA, 0xA3, 0xA4, |
1840 | 0xF9, 0xFE, 0xF7, 0xF0, 0xE5, 0xE2, 0xEB, 0xEC, 0xC1, 0xC6, 0xCF, 0xC8, 0xDD, 0xDA, 0xD3, 0xD4, |
1841 | 0x69, 0x6E, 0x67, 0x60, 0x75, 0x72, 0x7B, 0x7C, 0x51, 0x56, 0x5F, 0x58, 0x4D, 0x4A, 0x43, 0x44, |
1842 | 0x19, 0x1E, 0x17, 0x10, 0x05, 0x02, 0x0B, 0x0C, 0x21, 0x26, 0x2F, 0x28, 0x3D, 0x3A, 0x33, 0x34, |
1843 | 0x4E, 0x49, 0x40, 0x47, 0x52, 0x55, 0x5C, 0x5B, 0x76, 0x71, 0x78, 0x7F, 0x6A, 0x6D, 0x64, 0x63, |
1844 | 0x3E, 0x39, 0x30, 0x37, 0x22, 0x25, 0x2C, 0x2B, 0x06, 0x01, 0x08, 0x0F, 0x1A, 0x1D, 0x14, 0x13, |
1845 | 0xAE, 0xA9, 0xA0, 0xA7, 0xB2, 0xB5, 0xBC, 0xBB, 0x96, 0x91, 0x98, 0x9F, 0x8A, 0x8D, 0x84, 0x83, |
1846 | 0xDE, 0xD9, 0xD0, 0xD7, 0xC2, 0xC5, 0xCC, 0xCB, 0xE6, 0xE1, 0xE8, 0xEF, 0xFA, 0xFD, 0xF4, 0xF3 |
1847 | }; |
1848 | |
1849 | static drflac_uint16 drflac__crc16_table[] = { |
1850 | 0x0000, 0x8005, 0x800F, 0x000A, 0x801B, 0x001E, 0x0014, 0x8011, |
1851 | 0x8033, 0x0036, 0x003C, 0x8039, 0x0028, 0x802D, 0x8027, 0x0022, |
1852 | 0x8063, 0x0066, 0x006C, 0x8069, 0x0078, 0x807D, 0x8077, 0x0072, |
1853 | 0x0050, 0x8055, 0x805F, 0x005A, 0x804B, 0x004E, 0x0044, 0x8041, |
1854 | 0x80C3, 0x00C6, 0x00CC, 0x80C9, 0x00D8, 0x80DD, 0x80D7, 0x00D2, |
1855 | 0x00F0, 0x80F5, 0x80FF, 0x00FA, 0x80EB, 0x00EE, 0x00E4, 0x80E1, |
1856 | 0x00A0, 0x80A5, 0x80AF, 0x00AA, 0x80BB, 0x00BE, 0x00B4, 0x80B1, |
1857 | 0x8093, 0x0096, 0x009C, 0x8099, 0x0088, 0x808D, 0x8087, 0x0082, |
1858 | 0x8183, 0x0186, 0x018C, 0x8189, 0x0198, 0x819D, 0x8197, 0x0192, |
1859 | 0x01B0, 0x81B5, 0x81BF, 0x01BA, 0x81AB, 0x01AE, 0x01A4, 0x81A1, |
1860 | 0x01E0, 0x81E5, 0x81EF, 0x01EA, 0x81FB, 0x01FE, 0x01F4, 0x81F1, |
1861 | 0x81D3, 0x01D6, 0x01DC, 0x81D9, 0x01C8, 0x81CD, 0x81C7, 0x01C2, |
1862 | 0x0140, 0x8145, 0x814F, 0x014A, 0x815B, 0x015E, 0x0154, 0x8151, |
1863 | 0x8173, 0x0176, 0x017C, 0x8179, 0x0168, 0x816D, 0x8167, 0x0162, |
1864 | 0x8123, 0x0126, 0x012C, 0x8129, 0x0138, 0x813D, 0x8137, 0x0132, |
1865 | 0x0110, 0x8115, 0x811F, 0x011A, 0x810B, 0x010E, 0x0104, 0x8101, |
1866 | 0x8303, 0x0306, 0x030C, 0x8309, 0x0318, 0x831D, 0x8317, 0x0312, |
1867 | 0x0330, 0x8335, 0x833F, 0x033A, 0x832B, 0x032E, 0x0324, 0x8321, |
1868 | 0x0360, 0x8365, 0x836F, 0x036A, 0x837B, 0x037E, 0x0374, 0x8371, |
1869 | 0x8353, 0x0356, 0x035C, 0x8359, 0x0348, 0x834D, 0x8347, 0x0342, |
1870 | 0x03C0, 0x83C5, 0x83CF, 0x03CA, 0x83DB, 0x03DE, 0x03D4, 0x83D1, |
1871 | 0x83F3, 0x03F6, 0x03FC, 0x83F9, 0x03E8, 0x83ED, 0x83E7, 0x03E2, |
1872 | 0x83A3, 0x03A6, 0x03AC, 0x83A9, 0x03B8, 0x83BD, 0x83B7, 0x03B2, |
1873 | 0x0390, 0x8395, 0x839F, 0x039A, 0x838B, 0x038E, 0x0384, 0x8381, |
1874 | 0x0280, 0x8285, 0x828F, 0x028A, 0x829B, 0x029E, 0x0294, 0x8291, |
1875 | 0x82B3, 0x02B6, 0x02BC, 0x82B9, 0x02A8, 0x82AD, 0x82A7, 0x02A2, |
1876 | 0x82E3, 0x02E6, 0x02EC, 0x82E9, 0x02F8, 0x82FD, 0x82F7, 0x02F2, |
1877 | 0x02D0, 0x82D5, 0x82DF, 0x02DA, 0x82CB, 0x02CE, 0x02C4, 0x82C1, |
1878 | 0x8243, 0x0246, 0x024C, 0x8249, 0x0258, 0x825D, 0x8257, 0x0252, |
1879 | 0x0270, 0x8275, 0x827F, 0x027A, 0x826B, 0x026E, 0x0264, 0x8261, |
1880 | 0x0220, 0x8225, 0x822F, 0x022A, 0x823B, 0x023E, 0x0234, 0x8231, |
1881 | 0x8213, 0x0216, 0x021C, 0x8219, 0x0208, 0x820D, 0x8207, 0x0202 |
1882 | }; |
1883 | |
1884 | static DRFLAC_INLINE drflac_uint8 drflac_crc8_byte(drflac_uint8 crc, drflac_uint8 data) |
1885 | { |
1886 | return drflac__crc8_table[crc ^ data]; |
1887 | } |
1888 | |
1889 | static DRFLAC_INLINE drflac_uint8 drflac_crc8(drflac_uint8 crc, drflac_uint32 data, drflac_uint32 count) |
1890 | { |
1891 | #ifdef DR_FLAC_NO_CRC |
1892 | (void)crc; |
1893 | (void)data; |
1894 | (void)count; |
1895 | return 0; |
2ff0b512 |
1896 | #else |
1897 | drflac_uint32 wholeBytes; |
1898 | drflac_uint32 leftoverBits; |
1899 | drflac_uint64 leftoverDataMask; |
1900 | |
1901 | static drflac_uint64 leftoverDataMaskTable[8] = { |
1902 | 0x00, 0x01, 0x03, 0x07, 0x0F, 0x1F, 0x3F, 0x7F |
1903 | }; |
1904 | |
1905 | DRFLAC_ASSERT(count <= 32); |
1906 | |
1907 | wholeBytes = count >> 3; |
1908 | leftoverBits = count - (wholeBytes*8); |
1909 | leftoverDataMask = leftoverDataMaskTable[leftoverBits]; |
1910 | |
1911 | switch (wholeBytes) { |
1912 | case 4: crc = drflac_crc8_byte(crc, (drflac_uint8)((data & (0xFF000000UL << leftoverBits)) >> (24 + leftoverBits))); |
1913 | case 3: crc = drflac_crc8_byte(crc, (drflac_uint8)((data & (0x00FF0000UL << leftoverBits)) >> (16 + leftoverBits))); |
1914 | case 2: crc = drflac_crc8_byte(crc, (drflac_uint8)((data & (0x0000FF00UL << leftoverBits)) >> ( 8 + leftoverBits))); |
1915 | case 1: crc = drflac_crc8_byte(crc, (drflac_uint8)((data & (0x000000FFUL << leftoverBits)) >> ( 0 + leftoverBits))); |
1916 | case 0: if (leftoverBits > 0) crc = (drflac_uint8)((crc << leftoverBits) ^ drflac__crc8_table[(crc >> (8 - leftoverBits)) ^ (data & leftoverDataMask)]); |
1917 | } |
1918 | return crc; |
1919 | #endif |
2ff0b512 |
1920 | } |
1921 | |
1922 | static DRFLAC_INLINE drflac_uint16 drflac_crc16_byte(drflac_uint16 crc, drflac_uint8 data) |
1923 | { |
1924 | return (crc << 8) ^ drflac__crc16_table[(drflac_uint8)(crc >> 8) ^ data]; |
1925 | } |
1926 | |
1927 | static DRFLAC_INLINE drflac_uint16 drflac_crc16_cache(drflac_uint16 crc, drflac_cache_t data) |
1928 | { |
1929 | #ifdef DRFLAC_64BIT |
1930 | crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 56) & 0xFF)); |
1931 | crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 48) & 0xFF)); |
1932 | crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 40) & 0xFF)); |
1933 | crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 32) & 0xFF)); |
1934 | #endif |
1935 | crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 24) & 0xFF)); |
1936 | crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 16) & 0xFF)); |
1937 | crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 8) & 0xFF)); |
1938 | crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 0) & 0xFF)); |
1939 | |
1940 | return crc; |
1941 | } |
1942 | |
1943 | static DRFLAC_INLINE drflac_uint16 drflac_crc16_bytes(drflac_uint16 crc, drflac_cache_t data, drflac_uint32 byteCount) |
1944 | { |
1945 | switch (byteCount) |
1946 | { |
1947 | #ifdef DRFLAC_64BIT |
1948 | case 8: crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 56) & 0xFF)); |
1949 | case 7: crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 48) & 0xFF)); |
1950 | case 6: crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 40) & 0xFF)); |
1951 | case 5: crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 32) & 0xFF)); |
1952 | #endif |
1953 | case 4: crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 24) & 0xFF)); |
1954 | case 3: crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 16) & 0xFF)); |
1955 | case 2: crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 8) & 0xFF)); |
1956 | case 1: crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 0) & 0xFF)); |
1957 | } |
1958 | |
1959 | return crc; |
1960 | } |
1961 | |
2ff0b512 |
1962 | #ifdef DRFLAC_64BIT |
1963 | #define drflac__be2host__cache_line drflac__be2host_64 |
1964 | #else |
1965 | #define drflac__be2host__cache_line drflac__be2host_32 |
1966 | #endif |
1967 | |
1968 | /* |
1969 | BIT READING ATTEMPT #2 |
1970 | |
1971 | 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 |
1972 | on the most significant bit. It uses the notion of an L1 and L2 cache (borrowed from CPU architecture), where the L1 cache |
1973 | 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 |
1974 | 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 |
1975 | from onRead() is read into. |
1976 | */ |
1977 | #define DRFLAC_CACHE_L1_SIZE_BYTES(bs) (sizeof((bs)->cache)) |
1978 | #define DRFLAC_CACHE_L1_SIZE_BITS(bs) (sizeof((bs)->cache)*8) |
1979 | #define DRFLAC_CACHE_L1_BITS_REMAINING(bs) (DRFLAC_CACHE_L1_SIZE_BITS(bs) - (bs)->consumedBits) |
1980 | #define DRFLAC_CACHE_L1_SELECTION_MASK(_bitCount) (~((~(drflac_cache_t)0) >> (_bitCount))) |
1981 | #define DRFLAC_CACHE_L1_SELECTION_SHIFT(bs, _bitCount) (DRFLAC_CACHE_L1_SIZE_BITS(bs) - (_bitCount)) |
1982 | #define DRFLAC_CACHE_L1_SELECT(bs, _bitCount) (((bs)->cache) & DRFLAC_CACHE_L1_SELECTION_MASK(_bitCount)) |
1983 | #define DRFLAC_CACHE_L1_SELECT_AND_SHIFT(bs, _bitCount) (DRFLAC_CACHE_L1_SELECT((bs), (_bitCount)) >> DRFLAC_CACHE_L1_SELECTION_SHIFT((bs), (_bitCount))) |
1984 | #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))) |
1985 | #define DRFLAC_CACHE_L2_SIZE_BYTES(bs) (sizeof((bs)->cacheL2)) |
1986 | #define DRFLAC_CACHE_L2_LINE_COUNT(bs) (DRFLAC_CACHE_L2_SIZE_BYTES(bs) / sizeof((bs)->cacheL2[0])) |
1987 | #define DRFLAC_CACHE_L2_LINES_REMAINING(bs) (DRFLAC_CACHE_L2_LINE_COUNT(bs) - (bs)->nextL2Line) |
1988 | |
1989 | |
1990 | #ifndef DR_FLAC_NO_CRC |
1991 | static DRFLAC_INLINE void drflac__reset_crc16(drflac_bs* bs) |
1992 | { |
1993 | bs->crc16 = 0; |
1994 | bs->crc16CacheIgnoredBytes = bs->consumedBits >> 3; |
1995 | } |
1996 | |
1997 | static DRFLAC_INLINE void drflac__update_crc16(drflac_bs* bs) |
1998 | { |
1999 | if (bs->crc16CacheIgnoredBytes == 0) { |
2000 | bs->crc16 = drflac_crc16_cache(bs->crc16, bs->crc16Cache); |
2001 | } else { |
2002 | bs->crc16 = drflac_crc16_bytes(bs->crc16, bs->crc16Cache, DRFLAC_CACHE_L1_SIZE_BYTES(bs) - bs->crc16CacheIgnoredBytes); |
2003 | bs->crc16CacheIgnoredBytes = 0; |
2004 | } |
2005 | } |
2006 | |
2007 | static DRFLAC_INLINE drflac_uint16 drflac__flush_crc16(drflac_bs* bs) |
2008 | { |
2009 | /* We should never be flushing in a situation where we are not aligned on a byte boundary. */ |
2010 | DRFLAC_ASSERT((DRFLAC_CACHE_L1_BITS_REMAINING(bs) & 7) == 0); |
2011 | |
2012 | /* |
2013 | The bits that were read from the L1 cache need to be accumulated. The number of bytes needing to be accumulated is determined |
2014 | by the number of bits that have been consumed. |
2015 | */ |
2016 | if (DRFLAC_CACHE_L1_BITS_REMAINING(bs) == 0) { |
2017 | drflac__update_crc16(bs); |
2018 | } else { |
2019 | /* We only accumulate the consumed bits. */ |
2020 | bs->crc16 = drflac_crc16_bytes(bs->crc16, bs->crc16Cache >> DRFLAC_CACHE_L1_BITS_REMAINING(bs), (bs->consumedBits >> 3) - bs->crc16CacheIgnoredBytes); |
2021 | |
2022 | /* |
2023 | The bits that we just accumulated should never be accumulated again. We need to keep track of how many bytes were accumulated |
2024 | so we can handle that later. |
2025 | */ |
2026 | bs->crc16CacheIgnoredBytes = bs->consumedBits >> 3; |
2027 | } |
2028 | |
2029 | return bs->crc16; |
2030 | } |
2031 | #endif |
2032 | |
2033 | static DRFLAC_INLINE drflac_bool32 drflac__reload_l1_cache_from_l2(drflac_bs* bs) |
2034 | { |
2035 | size_t bytesRead; |
2036 | size_t alignedL1LineCount; |
2037 | |
2038 | /* Fast path. Try loading straight from L2. */ |
2039 | if (bs->nextL2Line < DRFLAC_CACHE_L2_LINE_COUNT(bs)) { |
2040 | bs->cache = bs->cacheL2[bs->nextL2Line++]; |
2041 | return DRFLAC_TRUE; |
2042 | } |
2043 | |
2044 | /* |
2045 | 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 |
2046 | any left. |
2047 | */ |
2048 | if (bs->unalignedByteCount > 0) { |
2049 | return DRFLAC_FALSE; /* If we have any unaligned bytes it means there's no more aligned bytes left in the client. */ |
2050 | } |
2051 | |
2052 | bytesRead = bs->onRead(bs->pUserData, bs->cacheL2, DRFLAC_CACHE_L2_SIZE_BYTES(bs)); |
2053 | |
2054 | bs->nextL2Line = 0; |
2055 | if (bytesRead == DRFLAC_CACHE_L2_SIZE_BYTES(bs)) { |
2056 | bs->cache = bs->cacheL2[bs->nextL2Line++]; |
2057 | return DRFLAC_TRUE; |
2058 | } |
2059 | |
2060 | |
2061 | /* |
2062 | If we get here it means we were unable to retrieve enough data to fill the entire L2 cache. It probably |
2063 | means we've just reached the end of the file. We need to move the valid data down to the end of the buffer |
2064 | and adjust the index of the next line accordingly. Also keep in mind that the L2 cache must be aligned to |
2065 | the size of the L1 so we'll need to seek backwards by any misaligned bytes. |
2066 | */ |
2067 | alignedL1LineCount = bytesRead / DRFLAC_CACHE_L1_SIZE_BYTES(bs); |
2068 | |
2069 | /* We need to keep track of any unaligned bytes for later use. */ |
2070 | bs->unalignedByteCount = bytesRead - (alignedL1LineCount * DRFLAC_CACHE_L1_SIZE_BYTES(bs)); |
2071 | if (bs->unalignedByteCount > 0) { |
2072 | bs->unalignedCache = bs->cacheL2[alignedL1LineCount]; |
2073 | } |
2074 | |
2075 | if (alignedL1LineCount > 0) { |
2076 | size_t offset = DRFLAC_CACHE_L2_LINE_COUNT(bs) - alignedL1LineCount; |
2077 | size_t i; |
2078 | for (i = alignedL1LineCount; i > 0; --i) { |
2079 | bs->cacheL2[i-1 + offset] = bs->cacheL2[i-1]; |
2080 | } |
2081 | |
2082 | bs->nextL2Line = (drflac_uint32)offset; |
2083 | bs->cache = bs->cacheL2[bs->nextL2Line++]; |
2084 | return DRFLAC_TRUE; |
2085 | } else { |
2086 | /* If we get into this branch it means we weren't able to load any L1-aligned data. */ |
2087 | bs->nextL2Line = DRFLAC_CACHE_L2_LINE_COUNT(bs); |
2088 | return DRFLAC_FALSE; |
2089 | } |
2090 | } |
2091 | |
2092 | static drflac_bool32 drflac__reload_cache(drflac_bs* bs) |
2093 | { |
2094 | size_t bytesRead; |
2095 | |
2096 | #ifndef DR_FLAC_NO_CRC |
2097 | drflac__update_crc16(bs); |
2098 | #endif |
2099 | |
2100 | /* Fast path. Try just moving the next value in the L2 cache to the L1 cache. */ |
2101 | if (drflac__reload_l1_cache_from_l2(bs)) { |
2102 | bs->cache = drflac__be2host__cache_line(bs->cache); |
2103 | bs->consumedBits = 0; |
2104 | #ifndef DR_FLAC_NO_CRC |
2105 | bs->crc16Cache = bs->cache; |
2106 | #endif |
2107 | return DRFLAC_TRUE; |
2108 | } |
2109 | |
2110 | /* Slow path. */ |
2111 | |
2112 | /* |
2113 | 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 |
2114 | 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 |
2115 | data from the unaligned cache. |
2116 | */ |
2117 | bytesRead = bs->unalignedByteCount; |
2118 | if (bytesRead == 0) { |
2119 | bs->consumedBits = DRFLAC_CACHE_L1_SIZE_BITS(bs); /* <-- The stream has been exhausted, so marked the bits as consumed. */ |
2120 | return DRFLAC_FALSE; |
2121 | } |
2122 | |
2123 | DRFLAC_ASSERT(bytesRead < DRFLAC_CACHE_L1_SIZE_BYTES(bs)); |
2124 | bs->consumedBits = (drflac_uint32)(DRFLAC_CACHE_L1_SIZE_BYTES(bs) - bytesRead) * 8; |
2125 | |
2126 | bs->cache = drflac__be2host__cache_line(bs->unalignedCache); |
2127 | 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. */ |
2128 | bs->unalignedByteCount = 0; /* <-- At this point the unaligned bytes have been moved into the cache and we thus have no more unaligned bytes. */ |
2129 | |
2130 | #ifndef DR_FLAC_NO_CRC |
2131 | bs->crc16Cache = bs->cache >> bs->consumedBits; |
2132 | bs->crc16CacheIgnoredBytes = bs->consumedBits >> 3; |
2133 | #endif |
2134 | return DRFLAC_TRUE; |
2135 | } |
2136 | |
2137 | static void drflac__reset_cache(drflac_bs* bs) |
2138 | { |
2139 | bs->nextL2Line = DRFLAC_CACHE_L2_LINE_COUNT(bs); /* <-- This clears the L2 cache. */ |
2140 | bs->consumedBits = DRFLAC_CACHE_L1_SIZE_BITS(bs); /* <-- This clears the L1 cache. */ |
2141 | bs->cache = 0; |
2142 | bs->unalignedByteCount = 0; /* <-- This clears the trailing unaligned bytes. */ |
2143 | bs->unalignedCache = 0; |
2144 | |
2145 | #ifndef DR_FLAC_NO_CRC |
2146 | bs->crc16Cache = 0; |
2147 | bs->crc16CacheIgnoredBytes = 0; |
2148 | #endif |
2149 | } |
2150 | |
2151 | |
2152 | static DRFLAC_INLINE drflac_bool32 drflac__read_uint32(drflac_bs* bs, unsigned int bitCount, drflac_uint32* pResultOut) |
2153 | { |
2154 | DRFLAC_ASSERT(bs != NULL); |
2155 | DRFLAC_ASSERT(pResultOut != NULL); |
2156 | DRFLAC_ASSERT(bitCount > 0); |
2157 | DRFLAC_ASSERT(bitCount <= 32); |
2158 | |
2159 | if (bs->consumedBits == DRFLAC_CACHE_L1_SIZE_BITS(bs)) { |
2160 | if (!drflac__reload_cache(bs)) { |
2161 | return DRFLAC_FALSE; |
2162 | } |
2163 | } |
2164 | |
2165 | if (bitCount <= DRFLAC_CACHE_L1_BITS_REMAINING(bs)) { |
2166 | /* |
2167 | 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 |
2168 | 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 |
2169 | more optimal solution for this. |
2170 | */ |
2171 | #ifdef DRFLAC_64BIT |
2172 | *pResultOut = (drflac_uint32)DRFLAC_CACHE_L1_SELECT_AND_SHIFT(bs, bitCount); |
2173 | bs->consumedBits += bitCount; |
2174 | bs->cache <<= bitCount; |
2175 | #else |
2176 | if (bitCount < DRFLAC_CACHE_L1_SIZE_BITS(bs)) { |
2177 | *pResultOut = (drflac_uint32)DRFLAC_CACHE_L1_SELECT_AND_SHIFT(bs, bitCount); |
2178 | bs->consumedBits += bitCount; |
2179 | bs->cache <<= bitCount; |
2180 | } else { |
2181 | /* Cannot shift by 32-bits, so need to do it differently. */ |
2182 | *pResultOut = (drflac_uint32)bs->cache; |
2183 | bs->consumedBits = DRFLAC_CACHE_L1_SIZE_BITS(bs); |
2184 | bs->cache = 0; |
2185 | } |
2186 | #endif |
2187 | |
2188 | return DRFLAC_TRUE; |
2189 | } else { |
2190 | /* 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. */ |
2191 | drflac_uint32 bitCountHi = DRFLAC_CACHE_L1_BITS_REMAINING(bs); |
2192 | drflac_uint32 bitCountLo = bitCount - bitCountHi; |
2193 | drflac_uint32 resultHi; |
2194 | |
2195 | DRFLAC_ASSERT(bitCountHi > 0); |
2196 | DRFLAC_ASSERT(bitCountHi < 32); |
2197 | resultHi = (drflac_uint32)DRFLAC_CACHE_L1_SELECT_AND_SHIFT(bs, bitCountHi); |
2198 | |
2199 | if (!drflac__reload_cache(bs)) { |
2200 | return DRFLAC_FALSE; |
2201 | } |
2202 | |
2203 | *pResultOut = (resultHi << bitCountLo) | (drflac_uint32)DRFLAC_CACHE_L1_SELECT_AND_SHIFT(bs, bitCountLo); |
2204 | bs->consumedBits += bitCountLo; |
2205 | bs->cache <<= bitCountLo; |
2206 | return DRFLAC_TRUE; |
2207 | } |
2208 | } |
2209 | |
2210 | static drflac_bool32 drflac__read_int32(drflac_bs* bs, unsigned int bitCount, drflac_int32* pResult) |
2211 | { |
2212 | drflac_uint32 result; |
2213 | |
2214 | DRFLAC_ASSERT(bs != NULL); |
2215 | DRFLAC_ASSERT(pResult != NULL); |
2216 | DRFLAC_ASSERT(bitCount > 0); |
2217 | DRFLAC_ASSERT(bitCount <= 32); |
2218 | |
2219 | if (!drflac__read_uint32(bs, bitCount, &result)) { |
2220 | return DRFLAC_FALSE; |
2221 | } |
2222 | |
2223 | /* Do not attempt to shift by 32 as it's undefined. */ |
2224 | if (bitCount < 32) { |
2225 | drflac_uint32 signbit; |
2226 | signbit = ((result >> (bitCount-1)) & 0x01); |
2227 | result |= (~signbit + 1) << bitCount; |
2228 | } |
2229 | |
2230 | *pResult = (drflac_int32)result; |
2231 | return DRFLAC_TRUE; |
2232 | } |
2233 | |
2234 | #ifdef DRFLAC_64BIT |
2235 | static drflac_bool32 drflac__read_uint64(drflac_bs* bs, unsigned int bitCount, drflac_uint64* pResultOut) |
2236 | { |
2237 | drflac_uint32 resultHi; |
2238 | drflac_uint32 resultLo; |
2239 | |
2240 | DRFLAC_ASSERT(bitCount <= 64); |
2241 | DRFLAC_ASSERT(bitCount > 32); |
2242 | |
2243 | if (!drflac__read_uint32(bs, bitCount - 32, &resultHi)) { |
2244 | return DRFLAC_FALSE; |
2245 | } |
2246 | |
2247 | if (!drflac__read_uint32(bs, 32, &resultLo)) { |
2248 | return DRFLAC_FALSE; |
2249 | } |
2250 | |
2251 | *pResultOut = (((drflac_uint64)resultHi) << 32) | ((drflac_uint64)resultLo); |
2252 | return DRFLAC_TRUE; |
2253 | } |
2254 | #endif |
2255 | |
2ff0b512 |
2256 | static drflac_bool32 drflac__read_uint16(drflac_bs* bs, unsigned int bitCount, drflac_uint16* pResult) |
2257 | { |
2258 | drflac_uint32 result; |
2259 | |
2260 | DRFLAC_ASSERT(bs != NULL); |
2261 | DRFLAC_ASSERT(pResult != NULL); |
2262 | DRFLAC_ASSERT(bitCount > 0); |
2263 | DRFLAC_ASSERT(bitCount <= 16); |
2264 | |
2265 | if (!drflac__read_uint32(bs, bitCount, &result)) { |
2266 | return DRFLAC_FALSE; |
2267 | } |
2268 | |
2269 | *pResult = (drflac_uint16)result; |
2270 | return DRFLAC_TRUE; |
2271 | } |
2272 | |
2ff0b512 |
2273 | static drflac_bool32 drflac__read_uint8(drflac_bs* bs, unsigned int bitCount, drflac_uint8* pResult) |
2274 | { |
2275 | drflac_uint32 result; |
2276 | |
2277 | DRFLAC_ASSERT(bs != NULL); |
2278 | DRFLAC_ASSERT(pResult != NULL); |
2279 | DRFLAC_ASSERT(bitCount > 0); |
2280 | DRFLAC_ASSERT(bitCount <= 8); |
2281 | |
2282 | if (!drflac__read_uint32(bs, bitCount, &result)) { |
2283 | return DRFLAC_FALSE; |
2284 | } |
2285 | |
2286 | *pResult = (drflac_uint8)result; |
2287 | return DRFLAC_TRUE; |
2288 | } |
2289 | |
2290 | static drflac_bool32 drflac__read_int8(drflac_bs* bs, unsigned int bitCount, drflac_int8* pResult) |
2291 | { |
2292 | drflac_int32 result; |
2293 | |
2294 | DRFLAC_ASSERT(bs != NULL); |
2295 | DRFLAC_ASSERT(pResult != NULL); |
2296 | DRFLAC_ASSERT(bitCount > 0); |
2297 | DRFLAC_ASSERT(bitCount <= 8); |
2298 | |
2299 | if (!drflac__read_int32(bs, bitCount, &result)) { |
2300 | return DRFLAC_FALSE; |
2301 | } |
2302 | |
2303 | *pResult = (drflac_int8)result; |
2304 | return DRFLAC_TRUE; |
2305 | } |
2306 | |
2307 | |
2308 | static drflac_bool32 drflac__seek_bits(drflac_bs* bs, size_t bitsToSeek) |
2309 | { |
2310 | if (bitsToSeek <= DRFLAC_CACHE_L1_BITS_REMAINING(bs)) { |
2311 | bs->consumedBits += (drflac_uint32)bitsToSeek; |
2312 | bs->cache <<= bitsToSeek; |
2313 | return DRFLAC_TRUE; |
2314 | } else { |
2315 | /* It straddles the cached data. This function isn't called too frequently so I'm favouring simplicity here. */ |
2316 | bitsToSeek -= DRFLAC_CACHE_L1_BITS_REMAINING(bs); |
2317 | bs->consumedBits += DRFLAC_CACHE_L1_BITS_REMAINING(bs); |
2318 | bs->cache = 0; |
2319 | |
2320 | /* Simple case. Seek in groups of the same number as bits that fit within a cache line. */ |
2321 | #ifdef DRFLAC_64BIT |
2322 | while (bitsToSeek >= DRFLAC_CACHE_L1_SIZE_BITS(bs)) { |
2323 | drflac_uint64 bin; |
2324 | if (!drflac__read_uint64(bs, DRFLAC_CACHE_L1_SIZE_BITS(bs), &bin)) { |
2325 | return DRFLAC_FALSE; |
2326 | } |
2327 | bitsToSeek -= DRFLAC_CACHE_L1_SIZE_BITS(bs); |
2328 | } |
2329 | #else |
2330 | while (bitsToSeek >= DRFLAC_CACHE_L1_SIZE_BITS(bs)) { |
2331 | drflac_uint32 bin; |
2332 | if (!drflac__read_uint32(bs, DRFLAC_CACHE_L1_SIZE_BITS(bs), &bin)) { |
2333 | return DRFLAC_FALSE; |
2334 | } |
2335 | bitsToSeek -= DRFLAC_CACHE_L1_SIZE_BITS(bs); |
2336 | } |
2337 | #endif |
2338 | |
2339 | /* Whole leftover bytes. */ |
2340 | while (bitsToSeek >= 8) { |
2341 | drflac_uint8 bin; |
2342 | if (!drflac__read_uint8(bs, 8, &bin)) { |
2343 | return DRFLAC_FALSE; |
2344 | } |
2345 | bitsToSeek -= 8; |
2346 | } |
2347 | |
2348 | /* Leftover bits. */ |
2349 | if (bitsToSeek > 0) { |
2350 | drflac_uint8 bin; |
2351 | if (!drflac__read_uint8(bs, (drflac_uint32)bitsToSeek, &bin)) { |
2352 | return DRFLAC_FALSE; |
2353 | } |
2354 | bitsToSeek = 0; /* <-- Necessary for the assert below. */ |
2355 | } |
2356 | |
2357 | DRFLAC_ASSERT(bitsToSeek == 0); |
2358 | return DRFLAC_TRUE; |
2359 | } |
2360 | } |
2361 | |
2362 | |
2363 | /* 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. */ |
2364 | static drflac_bool32 drflac__find_and_seek_to_next_sync_code(drflac_bs* bs) |
2365 | { |
2366 | DRFLAC_ASSERT(bs != NULL); |
2367 | |
2368 | /* |
2369 | 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 |
2370 | thing to do is align to the next byte. |
2371 | */ |
2372 | if (!drflac__seek_bits(bs, DRFLAC_CACHE_L1_BITS_REMAINING(bs) & 7)) { |
2373 | return DRFLAC_FALSE; |
2374 | } |
2375 | |
2376 | for (;;) { |
2377 | drflac_uint8 hi; |
2378 | |
2379 | #ifndef DR_FLAC_NO_CRC |
2380 | drflac__reset_crc16(bs); |
2381 | #endif |
2382 | |
2383 | if (!drflac__read_uint8(bs, 8, &hi)) { |
2384 | return DRFLAC_FALSE; |
2385 | } |
2386 | |
2387 | if (hi == 0xFF) { |
2388 | drflac_uint8 lo; |
2389 | if (!drflac__read_uint8(bs, 6, &lo)) { |
2390 | return DRFLAC_FALSE; |
2391 | } |
2392 | |
2393 | if (lo == 0x3E) { |
2394 | return DRFLAC_TRUE; |
2395 | } else { |
2396 | if (!drflac__seek_bits(bs, DRFLAC_CACHE_L1_BITS_REMAINING(bs) & 7)) { |
2397 | return DRFLAC_FALSE; |
2398 | } |
2399 | } |
2400 | } |
2401 | } |
2402 | |
2403 | /* Should never get here. */ |
2404 | /*return DRFLAC_FALSE;*/ |
2405 | } |
2406 | |
2407 | |
2408 | #if defined(DRFLAC_HAS_LZCNT_INTRINSIC) |
2409 | #define DRFLAC_IMPLEMENT_CLZ_LZCNT |
2410 | #endif |
2411 | #if defined(_MSC_VER) && _MSC_VER >= 1400 && (defined(DRFLAC_X64) || defined(DRFLAC_X86)) && !defined(__clang__) |
2412 | #define DRFLAC_IMPLEMENT_CLZ_MSVC |
2413 | #endif |
2414 | |
2415 | static DRFLAC_INLINE drflac_uint32 drflac__clz_software(drflac_cache_t x) |
2416 | { |
2417 | drflac_uint32 n; |
2418 | static drflac_uint32 clz_table_4[] = { |
2419 | 0, |
2420 | 4, |
2421 | 3, 3, |
2422 | 2, 2, 2, 2, |
2423 | 1, 1, 1, 1, 1, 1, 1, 1 |
2424 | }; |
2425 | |
2426 | if (x == 0) { |
2427 | return sizeof(x)*8; |
2428 | } |
2429 | |
2430 | n = clz_table_4[x >> (sizeof(x)*8 - 4)]; |
2431 | if (n == 0) { |
2432 | #ifdef DRFLAC_64BIT |
2433 | if ((x & ((drflac_uint64)0xFFFFFFFF << 32)) == 0) { n = 32; x <<= 32; } |
2434 | if ((x & ((drflac_uint64)0xFFFF0000 << 32)) == 0) { n += 16; x <<= 16; } |
2435 | if ((x & ((drflac_uint64)0xFF000000 << 32)) == 0) { n += 8; x <<= 8; } |
2436 | if ((x & ((drflac_uint64)0xF0000000 << 32)) == 0) { n += 4; x <<= 4; } |
2437 | #else |
2438 | if ((x & 0xFFFF0000) == 0) { n = 16; x <<= 16; } |
2439 | if ((x & 0xFF000000) == 0) { n += 8; x <<= 8; } |
2440 | if ((x & 0xF0000000) == 0) { n += 4; x <<= 4; } |
2441 | #endif |
2442 | n += clz_table_4[x >> (sizeof(x)*8 - 4)]; |
2443 | } |
2444 | |
2445 | return n - 1; |
2446 | } |
2447 | |
2448 | #ifdef DRFLAC_IMPLEMENT_CLZ_LZCNT |
2449 | static DRFLAC_INLINE drflac_bool32 drflac__is_lzcnt_supported(void) |
2450 | { |
2451 | /* Fast compile time check for ARM. */ |
2452 | #if defined(DRFLAC_HAS_LZCNT_INTRINSIC) && defined(DRFLAC_ARM) && (defined(__ARM_ARCH) && __ARM_ARCH >= 5) |
2453 | return DRFLAC_TRUE; |
2454 | #else |
2455 | /* If the compiler itself does not support the intrinsic then we'll need to return false. */ |
2456 | #ifdef DRFLAC_HAS_LZCNT_INTRINSIC |
2457 | return drflac__gIsLZCNTSupported; |
2458 | #else |
2459 | return DRFLAC_FALSE; |
2460 | #endif |
2461 | #endif |
2462 | } |
2463 | |
2464 | static DRFLAC_INLINE drflac_uint32 drflac__clz_lzcnt(drflac_cache_t x) |
2465 | { |
2466 | /* |
2467 | It's critical for competitive decoding performance that this function be highly optimal. With MSVC we can use the __lzcnt64() and __lzcnt() intrinsics |
2468 | to achieve good performance, however on GCC and Clang it's a little bit more annoying. The __builtin_clzl() and __builtin_clzll() intrinsics leave |
2469 | 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 |
2470 | 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 |
2471 | 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 |
2472 | 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 |
2473 | 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 |
2474 | getting clobbered? |
2475 | |
2476 | 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 |
2477 | assembly rules for `clang-cl`. If somebody can identify an error in dr_flac's inlined assembly I'm happy to get that fixed. |
2478 | |
2479 | Fortunately there is an easy workaround for this. Clang implements MSVC-specific intrinsics for compatibility. It also defines _MSC_VER for extra |
2480 | 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 |
2481 | to know how to fix the inlined assembly for correctness sake, however. |
2482 | */ |
2483 | |
2484 | #if defined(_MSC_VER) /*&& !defined(__clang__)*/ /* <-- Intentionally wanting Clang to use the MSVC __lzcnt64/__lzcnt intrinsics due to above ^. */ |
2485 | #ifdef DRFLAC_64BIT |
2486 | return (drflac_uint32)__lzcnt64(x); |
2487 | #else |
2488 | return (drflac_uint32)__lzcnt(x); |
2489 | #endif |
2490 | #else |
2491 | #if defined(__GNUC__) || defined(__clang__) |
2492 | #if defined(DRFLAC_X64) |
2493 | { |
2494 | drflac_uint64 r; |
2495 | __asm__ __volatile__ ( |
2496 | "lzcnt{ %1, %0| %0, %1}" : "=r"(r) : "r"(x) : "cc" |
2497 | ); |
2498 | |
2499 | return (drflac_uint32)r; |
2500 | } |
2501 | #elif defined(DRFLAC_X86) |
2502 | { |
2503 | drflac_uint32 r; |
2504 | __asm__ __volatile__ ( |
2505 | "lzcnt{l %1, %0| %0, %1}" : "=r"(r) : "r"(x) : "cc" |
2506 | ); |
2507 | |
2508 | return r; |
2509 | } |
2510 | #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. */ |
2511 | { |
2512 | unsigned int r; |
2513 | __asm__ __volatile__ ( |
2514 | #if defined(DRFLAC_64BIT) |
2515 | "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! */ |
2516 | #else |
2517 | "clz %[out], %[in]" : [out]"=r"(r) : [in]"r"(x) |
2518 | #endif |
2519 | ); |
2520 | |
2521 | return r; |
2522 | } |
2523 | #else |
2524 | if (x == 0) { |
2525 | return sizeof(x)*8; |
2526 | } |
2527 | #ifdef DRFLAC_64BIT |
2528 | return (drflac_uint32)__builtin_clzll((drflac_uint64)x); |
2529 | #else |
2530 | return (drflac_uint32)__builtin_clzl((drflac_uint32)x); |
2531 | #endif |
2532 | #endif |
2533 | #else |
2534 | /* Unsupported compiler. */ |
2535 | #error "This compiler does not support the lzcnt intrinsic." |
2536 | #endif |
2537 | #endif |
2538 | } |
2539 | #endif |
2540 | |
2541 | #ifdef DRFLAC_IMPLEMENT_CLZ_MSVC |
2542 | #include <intrin.h> /* For BitScanReverse(). */ |
2543 | |
2544 | static DRFLAC_INLINE drflac_uint32 drflac__clz_msvc(drflac_cache_t x) |
2545 | { |
2546 | drflac_uint32 n; |
2547 | |
2548 | if (x == 0) { |
2549 | return sizeof(x)*8; |
2550 | } |
2551 | |
2552 | #ifdef DRFLAC_64BIT |
2553 | _BitScanReverse64((unsigned long*)&n, x); |
2554 | #else |
2555 | _BitScanReverse((unsigned long*)&n, x); |
2556 | #endif |
2557 | return sizeof(x)*8 - n - 1; |
2558 | } |
2559 | #endif |
2560 | |
2561 | static DRFLAC_INLINE drflac_uint32 drflac__clz(drflac_cache_t x) |
2562 | { |
2563 | #ifdef DRFLAC_IMPLEMENT_CLZ_LZCNT |
2564 | if (drflac__is_lzcnt_supported()) { |
2565 | return drflac__clz_lzcnt(x); |
2566 | } else |
2567 | #endif |
2568 | { |
2569 | #ifdef DRFLAC_IMPLEMENT_CLZ_MSVC |
2570 | return drflac__clz_msvc(x); |
2571 | #else |
2572 | return drflac__clz_software(x); |
2573 | #endif |
2574 | } |
2575 | } |
2576 | |
2577 | |
2578 | static DRFLAC_INLINE drflac_bool32 drflac__seek_past_next_set_bit(drflac_bs* bs, unsigned int* pOffsetOut) |
2579 | { |
2580 | drflac_uint32 zeroCounter = 0; |
2581 | drflac_uint32 setBitOffsetPlus1; |
2582 | |
2583 | while (bs->cache == 0) { |
2584 | zeroCounter += (drflac_uint32)DRFLAC_CACHE_L1_BITS_REMAINING(bs); |
2585 | if (!drflac__reload_cache(bs)) { |
2586 | return DRFLAC_FALSE; |
2587 | } |
2588 | } |
2589 | |
2590 | setBitOffsetPlus1 = drflac__clz(bs->cache); |
2591 | setBitOffsetPlus1 += 1; |
2592 | |
2593 | bs->consumedBits += setBitOffsetPlus1; |
2594 | bs->cache <<= setBitOffsetPlus1; |
2595 | |
2596 | *pOffsetOut = zeroCounter + setBitOffsetPlus1 - 1; |
2597 | return DRFLAC_TRUE; |
2598 | } |
2599 | |
2600 | |
2601 | |
2602 | static drflac_bool32 drflac__seek_to_byte(drflac_bs* bs, drflac_uint64 offsetFromStart) |
2603 | { |
2604 | DRFLAC_ASSERT(bs != NULL); |
2605 | DRFLAC_ASSERT(offsetFromStart > 0); |
2606 | |
2607 | /* |
2608 | Seeking from the start is not quite as trivial as it sounds because the onSeek callback takes a signed 32-bit integer (which |
2609 | is intentional because it simplifies the implementation of the onSeek callbacks), however offsetFromStart is unsigned 64-bit. |
2610 | 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. |
2611 | */ |
2612 | if (offsetFromStart > 0x7FFFFFFF) { |
2613 | drflac_uint64 bytesRemaining = offsetFromStart; |
2614 | if (!bs->onSeek(bs->pUserData, 0x7FFFFFFF, drflac_seek_origin_start)) { |
2615 | return DRFLAC_FALSE; |
2616 | } |
2617 | bytesRemaining -= 0x7FFFFFFF; |
2618 | |
2619 | while (bytesRemaining > 0x7FFFFFFF) { |
2620 | if (!bs->onSeek(bs->pUserData, 0x7FFFFFFF, drflac_seek_origin_current)) { |
2621 | return DRFLAC_FALSE; |
2622 | } |
2623 | bytesRemaining -= 0x7FFFFFFF; |
2624 | } |
2625 | |
2626 | if (bytesRemaining > 0) { |
2627 | if (!bs->onSeek(bs->pUserData, (int)bytesRemaining, drflac_seek_origin_current)) { |
2628 | return DRFLAC_FALSE; |
2629 | } |
2630 | } |
2631 | } else { |
2632 | if (!bs->onSeek(bs->pUserData, (int)offsetFromStart, drflac_seek_origin_start)) { |
2633 | return DRFLAC_FALSE; |
2634 | } |
2635 | } |
2636 | |
2637 | /* The cache should be reset to force a reload of fresh data from the client. */ |
2638 | drflac__reset_cache(bs); |
2639 | return DRFLAC_TRUE; |
2640 | } |
2641 | |
2642 | |
2643 | static drflac_result drflac__read_utf8_coded_number(drflac_bs* bs, drflac_uint64* pNumberOut, drflac_uint8* pCRCOut) |
2644 | { |
2645 | drflac_uint8 crc; |
2646 | drflac_uint64 result; |
2647 | drflac_uint8 utf8[7] = {0}; |
2648 | int byteCount; |
2649 | int i; |
2650 | |
2651 | DRFLAC_ASSERT(bs != NULL); |
2652 | DRFLAC_ASSERT(pNumberOut != NULL); |
2653 | DRFLAC_ASSERT(pCRCOut != NULL); |
2654 | |
2655 | crc = *pCRCOut; |
2656 | |
2657 | if (!drflac__read_uint8(bs, 8, utf8)) { |
2658 | *pNumberOut = 0; |
2659 | return DRFLAC_AT_END; |
2660 | } |
2661 | crc = drflac_crc8(crc, utf8[0], 8); |
2662 | |
2663 | if ((utf8[0] & 0x80) == 0) { |
2664 | *pNumberOut = utf8[0]; |
2665 | *pCRCOut = crc; |
2666 | return DRFLAC_SUCCESS; |
2667 | } |
2668 | |
2669 | /*byteCount = 1;*/ |
2670 | if ((utf8[0] & 0xE0) == 0xC0) { |
2671 | byteCount = 2; |
2672 | } else if ((utf8[0] & 0xF0) == 0xE0) { |
2673 | byteCount = 3; |
2674 | } else if ((utf8[0] & 0xF8) == 0xF0) { |
2675 | byteCount = 4; |
2676 | } else if ((utf8[0] & 0xFC) == 0xF8) { |
2677 | byteCount = 5; |
2678 | } else if ((utf8[0] & 0xFE) == 0xFC) { |
2679 | byteCount = 6; |
2680 | } else if ((utf8[0] & 0xFF) == 0xFE) { |
2681 | byteCount = 7; |
2682 | } else { |
2683 | *pNumberOut = 0; |
2684 | return DRFLAC_CRC_MISMATCH; /* Bad UTF-8 encoding. */ |
2685 | } |
2686 | |
2687 | /* Read extra bytes. */ |
2688 | DRFLAC_ASSERT(byteCount > 1); |
2689 | |
2690 | result = (drflac_uint64)(utf8[0] & (0xFF >> (byteCount + 1))); |
2691 | for (i = 1; i < byteCount; ++i) { |
2692 | if (!drflac__read_uint8(bs, 8, utf8 + i)) { |
2693 | *pNumberOut = 0; |
2694 | return DRFLAC_AT_END; |
2695 | } |
2696 | crc = drflac_crc8(crc, utf8[i], 8); |
2697 | |
2698 | result = (result << 6) | (utf8[i] & 0x3F); |
2699 | } |
2700 | |
2701 | *pNumberOut = result; |
2702 | *pCRCOut = crc; |
2703 | return DRFLAC_SUCCESS; |
2704 | } |
2705 | |
2706 | |
2707 | |
2708 | /* |
2709 | The next two functions are responsible for calculating the prediction. |
2710 | |
2711 | 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 |
2712 | 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. |
2713 | */ |
2714 | static DRFLAC_INLINE drflac_int32 drflac__calculate_prediction_32(drflac_uint32 order, drflac_int32 shift, const drflac_int32* coefficients, drflac_int32* pDecodedSamples) |
2715 | { |
2716 | drflac_int32 prediction = 0; |
2717 | |
2718 | DRFLAC_ASSERT(order <= 32); |
2719 | |
2720 | /* 32-bit version. */ |
2721 | |
2722 | /* VC++ optimizes this to a single jmp. I've not yet verified this for other compilers. */ |
2723 | switch (order) |
2724 | { |
2725 | case 32: prediction += coefficients[31] * pDecodedSamples[-32]; |
2726 | case 31: prediction += coefficients[30] * pDecodedSamples[-31]; |
2727 | case 30: prediction += coefficients[29] * pDecodedSamples[-30]; |
2728 | case 29: prediction += coefficients[28] * pDecodedSamples[-29]; |
2729 | case 28: prediction += coefficients[27] * pDecodedSamples[-28]; |
2730 | case 27: prediction += coefficients[26] * pDecodedSamples[-27]; |
2731 | case 26: prediction += coefficients[25] * pDecodedSamples[-26]; |
2732 | case 25: prediction += coefficients[24] * pDecodedSamples[-25]; |
2733 | case 24: prediction += coefficients[23] * pDecodedSamples[-24]; |
2734 | case 23: prediction += coefficients[22] * pDecodedSamples[-23]; |
2735 | case 22: prediction += coefficients[21] * pDecodedSamples[-22]; |
2736 | case 21: prediction += coefficients[20] * pDecodedSamples[-21]; |
2737 | case 20: prediction += coefficients[19] * pDecodedSamples[-20]; |
2738 | case 19: prediction += coefficients[18] * pDecodedSamples[-19]; |
2739 | case 18: prediction += coefficients[17] * pDecodedSamples[-18]; |
2740 | case 17: prediction += coefficients[16] * pDecodedSamples[-17]; |
2741 | case 16: prediction += coefficients[15] * pDecodedSamples[-16]; |
2742 | case 15: prediction += coefficients[14] * pDecodedSamples[-15]; |
2743 | case 14: prediction += coefficients[13] * pDecodedSamples[-14]; |
2744 | case 13: prediction += coefficients[12] * pDecodedSamples[-13]; |
2745 | case 12: prediction += coefficients[11] * pDecodedSamples[-12]; |
2746 | case 11: prediction += coefficients[10] * pDecodedSamples[-11]; |
2747 | case 10: prediction += coefficients[ 9] * pDecodedSamples[-10]; |
2748 | case 9: prediction += coefficients[ 8] * pDecodedSamples[- 9]; |
2749 | case 8: prediction += coefficients[ 7] * pDecodedSamples[- 8]; |
2750 | case 7: prediction += coefficients[ 6] * pDecodedSamples[- 7]; |
2751 | case 6: prediction += coefficients[ 5] * pDecodedSamples[- 6]; |
2752 | case 5: prediction += coefficients[ 4] * pDecodedSamples[- 5]; |
2753 | case 4: prediction += coefficients[ 3] * pDecodedSamples[- 4]; |
2754 | case 3: prediction += coefficients[ 2] * pDecodedSamples[- 3]; |
2755 | case 2: prediction += coefficients[ 1] * pDecodedSamples[- 2]; |
2756 | case 1: prediction += coefficients[ 0] * pDecodedSamples[- 1]; |
2757 | } |
2758 | |
2759 | return (drflac_int32)(prediction >> shift); |
2760 | } |
2761 | |
2762 | static DRFLAC_INLINE drflac_int32 drflac__calculate_prediction_64(drflac_uint32 order, drflac_int32 shift, const drflac_int32* coefficients, drflac_int32* pDecodedSamples) |
2763 | { |
2764 | drflac_int64 prediction; |
2765 | |
2766 | DRFLAC_ASSERT(order <= 32); |
2767 | |
2768 | /* 64-bit version. */ |
2769 | |
2770 | /* This method is faster on the 32-bit build when compiling with VC++. See note below. */ |
2771 | #ifndef DRFLAC_64BIT |
2772 | if (order == 8) |
2773 | { |
2774 | prediction = coefficients[0] * (drflac_int64)pDecodedSamples[-1]; |
2775 | prediction += coefficients[1] * (drflac_int64)pDecodedSamples[-2]; |
2776 | prediction += coefficients[2] * (drflac_int64)pDecodedSamples[-3]; |
2777 | prediction += coefficients[3] * (drflac_int64)pDecodedSamples[-4]; |
2778 | prediction += coefficients[4] * (drflac_int64)pDecodedSamples[-5]; |
2779 | prediction += coefficients[5] * (drflac_int64)pDecodedSamples[-6]; |
2780 | prediction += coefficients[6] * (drflac_int64)pDecodedSamples[-7]; |
2781 | prediction += coefficients[7] * (drflac_int64)pDecodedSamples[-8]; |
2782 | } |
2783 | else if (order == 7) |
2784 | { |
2785 | prediction = coefficients[0] * (drflac_int64)pDecodedSamples[-1]; |
2786 | prediction += coefficients[1] * (drflac_int64)pDecodedSamples[-2]; |
2787 | prediction += coefficients[2] * (drflac_int64)pDecodedSamples[-3]; |
2788 | prediction += coefficients[3] * (drflac_int64)pDecodedSamples[-4]; |
2789 | prediction += coefficients[4] * (drflac_int64)pDecodedSamples[-5]; |
2790 | prediction += coefficients[5] * (drflac_int64)pDecodedSamples[-6]; |
2791 | prediction += coefficients[6] * (drflac_int64)pDecodedSamples[-7]; |
2792 | } |
2793 | else if (order == 3) |
2794 | { |
2795 | prediction = coefficients[0] * (drflac_int64)pDecodedSamples[-1]; |
2796 | prediction += coefficients[1] * (drflac_int64)pDecodedSamples[-2]; |
2797 | prediction += coefficients[2] * (drflac_int64)pDecodedSamples[-3]; |
2798 | } |
2799 | else if (order == 6) |
2800 | { |
2801 | prediction = coefficients[0] * (drflac_int64)pDecodedSamples[-1]; |
2802 | prediction += coefficients[1] * (drflac_int64)pDecodedSamples[-2]; |
2803 | prediction += coefficients[2] * (drflac_int64)pDecodedSamples[-3]; |
2804 | prediction += coefficients[3] * (drflac_int64)pDecodedSamples[-4]; |
2805 | prediction += coefficients[4] * (drflac_int64)pDecodedSamples[-5]; |
2806 | prediction += coefficients[5] * (drflac_int64)pDecodedSamples[-6]; |
2807 | } |
2808 | else if (order == 5) |
2809 | { |
2810 | prediction = coefficients[0] * (drflac_int64)pDecodedSamples[-1]; |
2811 | prediction += coefficients[1] * (drflac_int64)pDecodedSamples[-2]; |
2812 | prediction += coefficients[2] * (drflac_int64)pDecodedSamples[-3]; |
2813 | prediction += coefficients[3] * (drflac_int64)pDecodedSamples[-4]; |
2814 | prediction += coefficients[4] * (drflac_int64)pDecodedSamples[-5]; |
2815 | } |
2816 | else if (order == 4) |
2817 | { |
2818 | prediction = coefficients[0] * (drflac_int64)pDecodedSamples[-1]; |
2819 | prediction += coefficients[1] * (drflac_int64)pDecodedSamples[-2]; |
2820 | prediction += coefficients[2] * (drflac_int64)pDecodedSamples[-3]; |
2821 | prediction += coefficients[3] * (drflac_int64)pDecodedSamples[-4]; |
2822 | } |
2823 | else if (order == 12) |
2824 | { |
2825 | prediction = coefficients[0] * (drflac_int64)pDecodedSamples[-1]; |
2826 | prediction += coefficients[1] * (drflac_int64)pDecodedSamples[-2]; |
2827 | prediction += coefficients[2] * (drflac_int64)pDecodedSamples[-3]; |
2828 | prediction += coefficients[3] * (drflac_int64)pDecodedSamples[-4]; |
2829 | prediction += coefficients[4] * (drflac_int64)pDecodedSamples[-5]; |
2830 | prediction += coefficients[5] * (drflac_int64)pDecodedSamples[-6]; |
2831 | prediction += coefficients[6] * (drflac_int64)pDecodedSamples[-7]; |
2832 | prediction += coefficients[7] * (drflac_int64)pDecodedSamples[-8]; |
2833 | prediction += coefficients[8] * (drflac_int64)pDecodedSamples[-9]; |
2834 | prediction += coefficients[9] * (drflac_int64)pDecodedSamples[-10]; |
2835 | prediction += coefficients[10] * (drflac_int64)pDecodedSamples[-11]; |
2836 | prediction += coefficients[11] * (drflac_int64)pDecodedSamples[-12]; |
2837 | } |
2838 | else if (order == 2) |
2839 | { |
2840 | prediction = coefficients[0] * (drflac_int64)pDecodedSamples[-1]; |
2841 | prediction += coefficients[1] * (drflac_int64)pDecodedSamples[-2]; |
2842 | } |
2843 | else if (order == 1) |
2844 | { |
2845 | prediction = coefficients[0] * (drflac_int64)pDecodedSamples[-1]; |
2846 | } |
2847 | else if (order == 10) |
2848 | { |
2849 | prediction = coefficients[0] * (drflac_int64)pDecodedSamples[-1]; |
2850 | prediction += coefficients[1] * (drflac_int64)pDecodedSamples[-2]; |
2851 | prediction += coefficients[2] * (drflac_int64)pDecodedSamples[-3]; |
2852 | prediction += coefficients[3] * (drflac_int64)pDecodedSamples[-4]; |
2853 | prediction += coefficients[4] * (drflac_int64)pDecodedSamples[-5]; |
2854 | prediction += coefficients[5] * (drflac_int64)pDecodedSamples[-6]; |
2855 | prediction += coefficients[6] * (drflac_int64)pDecodedSamples[-7]; |
2856 | prediction += coefficients[7] * (drflac_int64)pDecodedSamples[-8]; |
2857 | prediction += coefficients[8] * (drflac_int64)pDecodedSamples[-9]; |
2858 | prediction += coefficients[9] * (drflac_int64)pDecodedSamples[-10]; |
2859 | } |
2860 | else if (order == 9) |
2861 | { |
2862 | prediction = coefficients[0] * (drflac_int64)pDecodedSamples[-1]; |
2863 | prediction += coefficients[1] * (drflac_int64)pDecodedSamples[-2]; |
2864 | prediction += coefficients[2] * (drflac_int64)pDecodedSamples[-3]; |
2865 | prediction += coefficients[3] * (drflac_int64)pDecodedSamples[-4]; |
2866 | prediction += coefficients[4] * (drflac_int64)pDecodedSamples[-5]; |
2867 | prediction += coefficients[5] * (drflac_int64)pDecodedSamples[-6]; |
2868 | prediction += coefficients[6] * (drflac_int64)pDecodedSamples[-7]; |
2869 | prediction += coefficients[7] * (drflac_int64)pDecodedSamples[-8]; |
2870 | prediction += coefficients[8] * (drflac_int64)pDecodedSamples[-9]; |
2871 | } |
2872 | else if (order == 11) |
2873 | { |
2874 | prediction = coefficients[0] * (drflac_int64)pDecodedSamples[-1]; |
2875 | prediction += coefficients[1] * (drflac_int64)pDecodedSamples[-2]; |
2876 | prediction += coefficients[2] * (drflac_int64)pDecodedSamples[-3]; |
2877 | prediction += coefficients[3] * (drflac_int64)pDecodedSamples[-4]; |
2878 | prediction += coefficients[4] * (drflac_int64)pDecodedSamples[-5]; |
2879 | prediction += coefficients[5] * (drflac_int64)pDecodedSamples[-6]; |
2880 | prediction += coefficients[6] * (drflac_int64)pDecodedSamples[-7]; |
2881 | prediction += coefficients[7] * (drflac_int64)pDecodedSamples[-8]; |
2882 | prediction += coefficients[8] * (drflac_int64)pDecodedSamples[-9]; |
2883 | prediction += coefficients[9] * (drflac_int64)pDecodedSamples[-10]; |
2884 | prediction += coefficients[10] * (drflac_int64)pDecodedSamples[-11]; |
2885 | } |
2886 | else |
2887 | { |
2888 | int j; |
2889 | |
2890 | prediction = 0; |
2891 | for (j = 0; j < (int)order; ++j) { |
2892 | prediction += coefficients[j] * (drflac_int64)pDecodedSamples[-j-1]; |
2893 | } |
2894 | } |
2895 | #endif |
2896 | |
2897 | /* |
2898 | VC++ optimizes this to a single jmp instruction, but only the 64-bit build. The 32-bit build generates less efficient code for some |
2899 | reason. The ugly version above is faster so we'll just switch between the two depending on the target platform. |
2900 | */ |
2901 | #ifdef DRFLAC_64BIT |
2902 | prediction = 0; |
2903 | switch (order) |
2904 | { |
2905 | case 32: prediction += coefficients[31] * (drflac_int64)pDecodedSamples[-32]; |
2906 | case 31: prediction += coefficients[30] * (drflac_int64)pDecodedSamples[-31]; |
2907 | case 30: prediction += coefficients[29] * (drflac_int64)pDecodedSamples[-30]; |
2908 | case 29: prediction += coefficients[28] * (drflac_int64)pDecodedSamples[-29]; |
2909 | case 28: prediction += coefficients[27] * (drflac_int64)pDecodedSamples[-28]; |
2910 | case 27: prediction += coefficients[26] * (drflac_int64)pDecodedSamples[-27]; |
2911 | case 26: prediction += coefficients[25] * (drflac_int64)pDecodedSamples[-26]; |
2912 | case 25: prediction += coefficients[24] * (drflac_int64)pDecodedSamples[-25]; |
2913 | case 24: prediction += coefficients[23] * (drflac_int64)pDecodedSamples[-24]; |
2914 | case 23: prediction += coefficients[22] * (drflac_int64)pDecodedSamples[-23]; |
2915 | case 22: prediction += coefficients[21] * (drflac_int64)pDecodedSamples[-22]; |
2916 | case 21: prediction += coefficients[20] * (drflac_int64)pDecodedSamples[-21]; |
2917 | case 20: prediction += coefficients[19] * (drflac_int64)pDecodedSamples[-20]; |
2918 | case 19: prediction += coefficients[18] * (drflac_int64)pDecodedSamples[-19]; |
2919 | case 18: prediction += coefficients[17] * (drflac_int64)pDecodedSamples[-18]; |
2920 | case 17: prediction += coefficients[16] * (drflac_int64)pDecodedSamples[-17]; |
2921 | case 16: prediction += coefficients[15] * (drflac_int64)pDecodedSamples[-16]; |
2922 | case 15: prediction += coefficients[14] * (drflac_int64)pDecodedSamples[-15]; |
2923 | case 14: prediction += coefficients[13] * (drflac_int64)pDecodedSamples[-14]; |
2924 | case 13: prediction += coefficients[12] * (drflac_int64)pDecodedSamples[-13]; |
2925 | case 12: prediction += coefficients[11] * (drflac_int64)pDecodedSamples[-12]; |
2926 | case 11: prediction += coefficients[10] * (drflac_int64)pDecodedSamples[-11]; |
2927 | case 10: prediction += coefficients[ 9] * (drflac_int64)pDecodedSamples[-10]; |
2928 | case 9: prediction += coefficients[ 8] * (drflac_int64)pDecodedSamples[- 9]; |
2929 | case 8: prediction += coefficients[ 7] * (drflac_int64)pDecodedSamples[- 8]; |
2930 | case 7: prediction += coefficients[ 6] * (drflac_int64)pDecodedSamples[- 7]; |
2931 | case 6: prediction += coefficients[ 5] * (drflac_int64)pDecodedSamples[- 6]; |
2932 | case 5: prediction += coefficients[ 4] * (drflac_int64)pDecodedSamples[- 5]; |
2933 | case 4: prediction += coefficients[ 3] * (drflac_int64)pDecodedSamples[- 4]; |
2934 | case 3: prediction += coefficients[ 2] * (drflac_int64)pDecodedSamples[- 3]; |
2935 | case 2: prediction += coefficients[ 1] * (drflac_int64)pDecodedSamples[- 2]; |
2936 | case 1: prediction += coefficients[ 0] * (drflac_int64)pDecodedSamples[- 1]; |
2937 | } |
2938 | #endif |
2939 | |
2940 | return (drflac_int32)(prediction >> shift); |
2941 | } |
2942 | |
f5b7bb83 |
2943 | static DRFLAC_INLINE drflac_bool32 drflac__read_rice_parts_x1(drflac_bs* bs, drflac_uint8 riceParam, drflac_uint32* pZeroCounterOut, drflac_uint32* pRiceParamPartOut) |
2ff0b512 |
2944 | { |
f5b7bb83 |
2945 | drflac_uint32 riceParamPlus1 = riceParam + 1; |
2946 | /*drflac_cache_t riceParamPlus1Mask = DRFLAC_CACHE_L1_SELECTION_MASK(riceParamPlus1);*/ |
2947 | drflac_uint32 riceParamPlus1Shift = DRFLAC_CACHE_L1_SELECTION_SHIFT(bs, riceParamPlus1); |
2948 | drflac_uint32 riceParamPlus1MaxConsumedBits = DRFLAC_CACHE_L1_SIZE_BITS(bs) - riceParamPlus1; |
2ff0b512 |
2949 | |
f5b7bb83 |
2950 | /* |
2951 | 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 |
2952 | no idea how this will work in practice... |
2953 | */ |
2954 | drflac_cache_t bs_cache = bs->cache; |
2955 | drflac_uint32 bs_consumedBits = bs->consumedBits; |
2ff0b512 |
2956 | |
f5b7bb83 |
2957 | /* The first thing to do is find the first unset bit. Most likely a bit will be set in the current cache line. */ |
2958 | drflac_uint32 lzcount = drflac__clz(bs_cache); |
2959 | if (lzcount < sizeof(bs_cache)*8) { |
2960 | pZeroCounterOut[0] = lzcount; |
2ff0b512 |
2961 | |
f5b7bb83 |
2962 | /* |
2963 | It is most likely that the riceParam part (which comes after the zero counter) is also on this cache line. When extracting |
2964 | this, we include the set bit from the unary coded part because it simplifies cache management. This bit will be handled |
2965 | outside of this function at a higher level. |
2966 | */ |
2967 | extract_rice_param_part: |
2968 | bs_cache <<= lzcount; |
2969 | bs_consumedBits += lzcount; |
2ff0b512 |
2970 | |
f5b7bb83 |
2971 | if (bs_consumedBits <= riceParamPlus1MaxConsumedBits) { |
2972 | /* Getting here means the rice parameter part is wholly contained within the current cache line. */ |
2973 | pRiceParamPartOut[0] = (drflac_uint32)(bs_cache >> riceParamPlus1Shift); |
2974 | bs_cache <<= riceParamPlus1; |
2975 | bs_consumedBits += riceParamPlus1; |
2ff0b512 |
2976 | } else { |
f5b7bb83 |
2977 | drflac_uint32 riceParamPartHi; |
2978 | drflac_uint32 riceParamPartLo; |
2979 | drflac_uint32 riceParamPartLoBitCount; |
2ff0b512 |
2980 | |
f5b7bb83 |
2981 | /* |
2982 | Getting here means the rice parameter part straddles the cache line. We need to read from the tail of the current cache |
2983 | line, reload the cache, and then combine it with the head of the next cache line. |
2984 | */ |
2ff0b512 |
2985 | |
f5b7bb83 |
2986 | /* Grab the high part of the rice parameter part. */ |
2987 | riceParamPartHi = (drflac_uint32)(bs_cache >> riceParamPlus1Shift); |
2ff0b512 |
2988 | |
f5b7bb83 |
2989 | /* Before reloading the cache we need to grab the size in bits of the low part. */ |
2990 | riceParamPartLoBitCount = bs_consumedBits - riceParamPlus1MaxConsumedBits; |
2991 | DRFLAC_ASSERT(riceParamPartLoBitCount > 0 && riceParamPartLoBitCount < 32); |
2ff0b512 |
2992 | |
f5b7bb83 |
2993 | /* Now reload the cache. */ |
2994 | if (bs->nextL2Line < DRFLAC_CACHE_L2_LINE_COUNT(bs)) { |
2995 | #ifndef DR_FLAC_NO_CRC |
2996 | drflac__update_crc16(bs); |
2997 | #endif |
2998 | bs_cache = drflac__be2host__cache_line(bs->cacheL2[bs->nextL2Line++]); |
2999 | bs_consumedBits = riceParamPartLoBitCount; |
3000 | #ifndef DR_FLAC_NO_CRC |
3001 | bs->crc16Cache = bs_cache; |
3002 | #endif |
3003 | } else { |
3004 | /* Slow path. We need to fetch more data from the client. */ |
3005 | if (!drflac__reload_cache(bs)) { |
3006 | return DRFLAC_FALSE; |
3007 | } |
2ff0b512 |
3008 | |
f5b7bb83 |
3009 | bs_cache = bs->cache; |
3010 | bs_consumedBits = bs->consumedBits + riceParamPartLoBitCount; |
3011 | } |
2ff0b512 |
3012 | |
3013 | /* We should now have enough information to construct the rice parameter part. */ |
3014 | riceParamPartLo = (drflac_uint32)(bs_cache >> (DRFLAC_CACHE_L1_SELECTION_SHIFT(bs, riceParamPartLoBitCount))); |
3015 | pRiceParamPartOut[0] = riceParamPartHi | riceParamPartLo; |
3016 | |
3017 | bs_cache <<= riceParamPartLoBitCount; |
3018 | } |
3019 | } else { |
3020 | /* |
3021 | Getting here means there are no bits set on the cache line. This is a less optimal case because we just wasted a call |
3022 | to drflac__clz() and we need to reload the cache. |
3023 | */ |
3024 | drflac_uint32 zeroCounter = (drflac_uint32)(DRFLAC_CACHE_L1_SIZE_BITS(bs) - bs_consumedBits); |
3025 | for (;;) { |
3026 | if (bs->nextL2Line < DRFLAC_CACHE_L2_LINE_COUNT(bs)) { |
3027 | #ifndef DR_FLAC_NO_CRC |
3028 | drflac__update_crc16(bs); |
3029 | #endif |
3030 | bs_cache = drflac__be2host__cache_line(bs->cacheL2[bs->nextL2Line++]); |
3031 | bs_consumedBits = 0; |
3032 | #ifndef DR_FLAC_NO_CRC |
3033 | bs->crc16Cache = bs_cache; |
3034 | #endif |
3035 | } else { |
3036 | /* Slow path. We need to fetch more data from the client. */ |
3037 | if (!drflac__reload_cache(bs)) { |
3038 | return DRFLAC_FALSE; |
3039 | } |
3040 | |
3041 | bs_cache = bs->cache; |
3042 | bs_consumedBits = bs->consumedBits; |
3043 | } |
3044 | |
3045 | lzcount = drflac__clz(bs_cache); |
3046 | zeroCounter += lzcount; |
3047 | |
3048 | if (lzcount < sizeof(bs_cache)*8) { |
3049 | break; |
3050 | } |
3051 | } |
3052 | |
3053 | pZeroCounterOut[0] = zeroCounter; |
3054 | goto extract_rice_param_part; |
3055 | } |
3056 | |
3057 | /* Make sure the cache is restored at the end of it all. */ |
3058 | bs->cache = bs_cache; |
3059 | bs->consumedBits = bs_consumedBits; |
3060 | |
3061 | return DRFLAC_TRUE; |
3062 | } |
3063 | |
3064 | static DRFLAC_INLINE drflac_bool32 drflac__seek_rice_parts(drflac_bs* bs, drflac_uint8 riceParam) |
3065 | { |
3066 | drflac_uint32 riceParamPlus1 = riceParam + 1; |
3067 | drflac_uint32 riceParamPlus1MaxConsumedBits = DRFLAC_CACHE_L1_SIZE_BITS(bs) - riceParamPlus1; |
3068 | |
3069 | /* |
3070 | 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 |
3071 | no idea how this will work in practice... |
3072 | */ |
3073 | drflac_cache_t bs_cache = bs->cache; |
3074 | drflac_uint32 bs_consumedBits = bs->consumedBits; |
3075 | |
3076 | /* The first thing to do is find the first unset bit. Most likely a bit will be set in the current cache line. */ |
3077 | drflac_uint32 lzcount = drflac__clz(bs_cache); |
3078 | if (lzcount < sizeof(bs_cache)*8) { |
3079 | /* |
3080 | It is most likely that the riceParam part (which comes after the zero counter) is also on this cache line. When extracting |
3081 | this, we include the set bit from the unary coded part because it simplifies cache management. This bit will be handled |
3082 | outside of this function at a higher level. |
3083 | */ |
3084 | extract_rice_param_part: |
3085 | bs_cache <<= lzcount; |
3086 | bs_consumedBits += lzcount; |
3087 | |
3088 | if (bs_consumedBits <= riceParamPlus1MaxConsumedBits) { |
3089 | /* Getting here means the rice parameter part is wholly contained within the current cache line. */ |
3090 | bs_cache <<= riceParamPlus1; |
3091 | bs_consumedBits += riceParamPlus1; |
3092 | } else { |
3093 | /* |
3094 | Getting here means the rice parameter part straddles the cache line. We need to read from the tail of the current cache |
3095 | line, reload the cache, and then combine it with the head of the next cache line. |
3096 | */ |
3097 | |
3098 | /* Before reloading the cache we need to grab the size in bits of the low part. */ |
3099 | drflac_uint32 riceParamPartLoBitCount = bs_consumedBits - riceParamPlus1MaxConsumedBits; |
3100 | DRFLAC_ASSERT(riceParamPartLoBitCount > 0 && riceParamPartLoBitCount < 32); |
3101 | |
3102 | /* Now reload the cache. */ |
3103 | if (bs->nextL2Line < DRFLAC_CACHE_L2_LINE_COUNT(bs)) { |
3104 | #ifndef DR_FLAC_NO_CRC |
3105 | drflac__update_crc16(bs); |
3106 | #endif |
3107 | bs_cache = drflac__be2host__cache_line(bs->cacheL2[bs->nextL2Line++]); |
3108 | bs_consumedBits = riceParamPartLoBitCount; |
3109 | #ifndef DR_FLAC_NO_CRC |
3110 | bs->crc16Cache = bs_cache; |
3111 | #endif |
3112 | } else { |
3113 | /* Slow path. We need to fetch more data from the client. */ |
3114 | if (!drflac__reload_cache(bs)) { |
3115 | return DRFLAC_FALSE; |
3116 | } |
3117 | |
3118 | bs_cache = bs->cache; |
3119 | bs_consumedBits = bs->consumedBits + riceParamPartLoBitCount; |
3120 | } |
3121 | |
3122 | bs_cache <<= riceParamPartLoBitCount; |
3123 | } |
3124 | } else { |
3125 | /* |
3126 | Getting here means there are no bits set on the cache line. This is a less optimal case because we just wasted a call |
3127 | to drflac__clz() and we need to reload the cache. |
3128 | */ |
3129 | for (;;) { |
3130 | if (bs->nextL2Line < DRFLAC_CACHE_L2_LINE_COUNT(bs)) { |
3131 | #ifndef DR_FLAC_NO_CRC |
3132 | drflac__update_crc16(bs); |
3133 | #endif |
3134 | bs_cache = drflac__be2host__cache_line(bs->cacheL2[bs->nextL2Line++]); |
3135 | bs_consumedBits = 0; |
3136 | #ifndef DR_FLAC_NO_CRC |
3137 | bs->crc16Cache = bs_cache; |
3138 | #endif |
3139 | } else { |
3140 | /* Slow path. We need to fetch more data from the client. */ |
3141 | if (!drflac__reload_cache(bs)) { |
3142 | return DRFLAC_FALSE; |
3143 | } |
3144 | |
3145 | bs_cache = bs->cache; |
3146 | bs_consumedBits = bs->consumedBits; |
3147 | } |
3148 | |
3149 | lzcount = drflac__clz(bs_cache); |
3150 | if (lzcount < sizeof(bs_cache)*8) { |
3151 | break; |
3152 | } |
3153 | } |
3154 | |
3155 | goto extract_rice_param_part; |
3156 | } |
3157 | |
3158 | /* Make sure the cache is restored at the end of it all. */ |
3159 | bs->cache = bs_cache; |
3160 | bs->consumedBits = bs_consumedBits; |
3161 | |
3162 | return DRFLAC_TRUE; |
3163 | } |
3164 | |
3165 | |
3166 | 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) |
3167 | { |
3168 | drflac_uint32 t[2] = {0x00000000, 0xFFFFFFFF}; |
3169 | drflac_uint32 zeroCountPart0; |
3170 | drflac_uint32 riceParamPart0; |
3171 | drflac_uint32 riceParamMask; |
3172 | drflac_uint32 i; |
3173 | |
3174 | DRFLAC_ASSERT(bs != NULL); |
3175 | DRFLAC_ASSERT(count > 0); |
3176 | DRFLAC_ASSERT(pSamplesOut != NULL); |
3177 | |
3178 | (void)bitsPerSample; |
3179 | (void)order; |
3180 | (void)shift; |
3181 | (void)coefficients; |
3182 | |
3183 | riceParamMask = (drflac_uint32)~((~0UL) << riceParam); |
3184 | |
3185 | i = 0; |
3186 | while (i < count) { |
3187 | /* Rice extraction. */ |
3188 | if (!drflac__read_rice_parts_x1(bs, riceParam, &zeroCountPart0, &riceParamPart0)) { |
3189 | return DRFLAC_FALSE; |
3190 | } |
3191 | |
3192 | /* Rice reconstruction. */ |
3193 | riceParamPart0 &= riceParamMask; |
3194 | riceParamPart0 |= (zeroCountPart0 << riceParam); |
3195 | riceParamPart0 = (riceParamPart0 >> 1) ^ t[riceParamPart0 & 0x01]; |
3196 | |
3197 | pSamplesOut[i] = riceParamPart0; |
3198 | |
3199 | i += 1; |
3200 | } |
3201 | |
3202 | return DRFLAC_TRUE; |
3203 | } |
3204 | |
3205 | 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) |
3206 | { |
3207 | drflac_uint32 t[2] = {0x00000000, 0xFFFFFFFF}; |
3208 | drflac_uint32 zeroCountPart0 = 0; |
3209 | drflac_uint32 zeroCountPart1 = 0; |
3210 | drflac_uint32 zeroCountPart2 = 0; |
3211 | drflac_uint32 zeroCountPart3 = 0; |
3212 | drflac_uint32 riceParamPart0 = 0; |
3213 | drflac_uint32 riceParamPart1 = 0; |
3214 | drflac_uint32 riceParamPart2 = 0; |
3215 | drflac_uint32 riceParamPart3 = 0; |
3216 | drflac_uint32 riceParamMask; |
3217 | const drflac_int32* pSamplesOutEnd; |
3218 | drflac_uint32 i; |
3219 | |
3220 | DRFLAC_ASSERT(bs != NULL); |
3221 | DRFLAC_ASSERT(count > 0); |
3222 | DRFLAC_ASSERT(pSamplesOut != NULL); |
3223 | |
3224 | if (order == 0) { |
3225 | return drflac__decode_samples_with_residual__rice__scalar_zeroorder(bs, bitsPerSample, count, riceParam, order, shift, coefficients, pSamplesOut); |
3226 | } |
3227 | |
3228 | riceParamMask = (drflac_uint32)~((~0UL) << riceParam); |
3229 | pSamplesOutEnd = pSamplesOut + (count & ~3); |
3230 | |
3231 | if (bitsPerSample+shift > 32) { |
3232 | while (pSamplesOut < pSamplesOutEnd) { |
3233 | /* |
3234 | Rice extraction. It's faster to do this one at a time against local variables than it is to use the x4 version |
3235 | against an array. Not sure why, but perhaps it's making more efficient use of registers? |
3236 | */ |
3237 | if (!drflac__read_rice_parts_x1(bs, riceParam, &zeroCountPart0, &riceParamPart0) || |
3238 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountPart1, &riceParamPart1) || |
3239 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountPart2, &riceParamPart2) || |
3240 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountPart3, &riceParamPart3)) { |
3241 | return DRFLAC_FALSE; |
3242 | } |
3243 | |
3244 | riceParamPart0 &= riceParamMask; |
3245 | riceParamPart1 &= riceParamMask; |
3246 | riceParamPart2 &= riceParamMask; |
3247 | riceParamPart3 &= riceParamMask; |
3248 | |
3249 | riceParamPart0 |= (zeroCountPart0 << riceParam); |
3250 | riceParamPart1 |= (zeroCountPart1 << riceParam); |
3251 | riceParamPart2 |= (zeroCountPart2 << riceParam); |
3252 | riceParamPart3 |= (zeroCountPart3 << riceParam); |
3253 | |
3254 | riceParamPart0 = (riceParamPart0 >> 1) ^ t[riceParamPart0 & 0x01]; |
3255 | riceParamPart1 = (riceParamPart1 >> 1) ^ t[riceParamPart1 & 0x01]; |
3256 | riceParamPart2 = (riceParamPart2 >> 1) ^ t[riceParamPart2 & 0x01]; |
3257 | riceParamPart3 = (riceParamPart3 >> 1) ^ t[riceParamPart3 & 0x01]; |
3258 | |
3259 | pSamplesOut[0] = riceParamPart0 + drflac__calculate_prediction_64(order, shift, coefficients, pSamplesOut + 0); |
3260 | pSamplesOut[1] = riceParamPart1 + drflac__calculate_prediction_64(order, shift, coefficients, pSamplesOut + 1); |
3261 | pSamplesOut[2] = riceParamPart2 + drflac__calculate_prediction_64(order, shift, coefficients, pSamplesOut + 2); |
3262 | pSamplesOut[3] = riceParamPart3 + drflac__calculate_prediction_64(order, shift, coefficients, pSamplesOut + 3); |
3263 | |
3264 | pSamplesOut += 4; |
3265 | } |
3266 | } else { |
3267 | while (pSamplesOut < pSamplesOutEnd) { |
3268 | if (!drflac__read_rice_parts_x1(bs, riceParam, &zeroCountPart0, &riceParamPart0) || |
3269 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountPart1, &riceParamPart1) || |
3270 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountPart2, &riceParamPart2) || |
3271 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountPart3, &riceParamPart3)) { |
3272 | return DRFLAC_FALSE; |
3273 | } |
3274 | |
3275 | riceParamPart0 &= riceParamMask; |
3276 | riceParamPart1 &= riceParamMask; |
3277 | riceParamPart2 &= riceParamMask; |
3278 | riceParamPart3 &= riceParamMask; |
3279 | |
3280 | riceParamPart0 |= (zeroCountPart0 << riceParam); |
3281 | riceParamPart1 |= (zeroCountPart1 << riceParam); |
3282 | riceParamPart2 |= (zeroCountPart2 << riceParam); |
3283 | riceParamPart3 |= (zeroCountPart3 << riceParam); |
3284 | |
3285 | riceParamPart0 = (riceParamPart0 >> 1) ^ t[riceParamPart0 & 0x01]; |
3286 | riceParamPart1 = (riceParamPart1 >> 1) ^ t[riceParamPart1 & 0x01]; |
3287 | riceParamPart2 = (riceParamPart2 >> 1) ^ t[riceParamPart2 & 0x01]; |
3288 | riceParamPart3 = (riceParamPart3 >> 1) ^ t[riceParamPart3 & 0x01]; |
3289 | |
3290 | pSamplesOut[0] = riceParamPart0 + drflac__calculate_prediction_32(order, shift, coefficients, pSamplesOut + 0); |
3291 | pSamplesOut[1] = riceParamPart1 + drflac__calculate_prediction_32(order, shift, coefficients, pSamplesOut + 1); |
3292 | pSamplesOut[2] = riceParamPart2 + drflac__calculate_prediction_32(order, shift, coefficients, pSamplesOut + 2); |
3293 | pSamplesOut[3] = riceParamPart3 + drflac__calculate_prediction_32(order, shift, coefficients, pSamplesOut + 3); |
3294 | |
3295 | pSamplesOut += 4; |
3296 | } |
3297 | } |
3298 | |
3299 | i = (count & ~3); |
3300 | while (i < count) { |
3301 | /* Rice extraction. */ |
3302 | if (!drflac__read_rice_parts_x1(bs, riceParam, &zeroCountPart0, &riceParamPart0)) { |
3303 | return DRFLAC_FALSE; |
3304 | } |
3305 | |
3306 | /* Rice reconstruction. */ |
3307 | riceParamPart0 &= riceParamMask; |
3308 | riceParamPart0 |= (zeroCountPart0 << riceParam); |
3309 | riceParamPart0 = (riceParamPart0 >> 1) ^ t[riceParamPart0 & 0x01]; |
3310 | /*riceParamPart0 = (riceParamPart0 >> 1) ^ (~(riceParamPart0 & 0x01) + 1);*/ |
3311 | |
3312 | /* Sample reconstruction. */ |
3313 | if (bitsPerSample+shift > 32) { |
3314 | pSamplesOut[0] = riceParamPart0 + drflac__calculate_prediction_64(order, shift, coefficients, pSamplesOut + 0); |
3315 | } else { |
3316 | pSamplesOut[0] = riceParamPart0 + drflac__calculate_prediction_32(order, shift, coefficients, pSamplesOut + 0); |
3317 | } |
3318 | |
3319 | i += 1; |
3320 | pSamplesOut += 1; |
3321 | } |
3322 | |
3323 | return DRFLAC_TRUE; |
3324 | } |
3325 | |
3326 | #if defined(DRFLAC_SUPPORT_SSE2) |
3327 | static DRFLAC_INLINE __m128i drflac__mm_packs_interleaved_epi32(__m128i a, __m128i b) |
3328 | { |
3329 | __m128i r; |
3330 | |
3331 | /* Pack. */ |
3332 | r = _mm_packs_epi32(a, b); |
3333 | |
3334 | /* a3a2 a1a0 b3b2 b1b0 -> a3a2 b3b2 a1a0 b1b0 */ |
3335 | r = _mm_shuffle_epi32(r, _MM_SHUFFLE(3, 1, 2, 0)); |
3336 | |
3337 | /* a3a2 b3b2 a1a0 b1b0 -> a3b3 a2b2 a1b1 a0b0 */ |
3338 | r = _mm_shufflehi_epi16(r, _MM_SHUFFLE(3, 1, 2, 0)); |
3339 | r = _mm_shufflelo_epi16(r, _MM_SHUFFLE(3, 1, 2, 0)); |
3340 | |
3341 | return r; |
3342 | } |
3343 | #endif |
3344 | |
3345 | #if defined(DRFLAC_SUPPORT_SSE41) |
3346 | static DRFLAC_INLINE __m128i drflac__mm_not_si128(__m128i a) |
3347 | { |
3348 | return _mm_xor_si128(a, _mm_cmpeq_epi32(_mm_setzero_si128(), _mm_setzero_si128())); |
3349 | } |
3350 | |
3351 | static DRFLAC_INLINE __m128i drflac__mm_hadd_epi32(__m128i x) |
3352 | { |
3353 | __m128i x64 = _mm_add_epi32(x, _mm_shuffle_epi32(x, _MM_SHUFFLE(1, 0, 3, 2))); |
3354 | __m128i x32 = _mm_shufflelo_epi16(x64, _MM_SHUFFLE(1, 0, 3, 2)); |
3355 | return _mm_add_epi32(x64, x32); |
3356 | } |
3357 | |
3358 | static DRFLAC_INLINE __m128i drflac__mm_hadd_epi64(__m128i x) |
3359 | { |
3360 | return _mm_add_epi64(x, _mm_shuffle_epi32(x, _MM_SHUFFLE(1, 0, 3, 2))); |
3361 | } |
3362 | |
3363 | static DRFLAC_INLINE __m128i drflac__mm_srai_epi64(__m128i x, int count) |
3364 | { |
3365 | /* |
3366 | 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 |
3367 | is shifted with zero bits, whereas the right side is shifted with sign bits. |
3368 | */ |
3369 | __m128i lo = _mm_srli_epi64(x, count); |
3370 | __m128i hi = _mm_srai_epi32(x, count); |
3371 | |
3372 | hi = _mm_and_si128(hi, _mm_set_epi32(0xFFFFFFFF, 0, 0xFFFFFFFF, 0)); /* The high part needs to have the low part cleared. */ |
3373 | |
3374 | return _mm_or_si128(lo, hi); |
3375 | } |
3376 | |
3377 | 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) |
3378 | { |
3379 | int i; |
3380 | drflac_uint32 riceParamMask; |
3381 | drflac_int32* pDecodedSamples = pSamplesOut; |
3382 | drflac_int32* pDecodedSamplesEnd = pSamplesOut + (count & ~3); |
3383 | drflac_uint32 zeroCountParts0 = 0; |
3384 | drflac_uint32 zeroCountParts1 = 0; |
3385 | drflac_uint32 zeroCountParts2 = 0; |
3386 | drflac_uint32 zeroCountParts3 = 0; |
3387 | drflac_uint32 riceParamParts0 = 0; |
3388 | drflac_uint32 riceParamParts1 = 0; |
3389 | drflac_uint32 riceParamParts2 = 0; |
3390 | drflac_uint32 riceParamParts3 = 0; |
3391 | __m128i coefficients128_0; |
3392 | __m128i coefficients128_4; |
3393 | __m128i coefficients128_8; |
3394 | __m128i samples128_0; |
3395 | __m128i samples128_4; |
3396 | __m128i samples128_8; |
3397 | __m128i riceParamMask128; |
3398 | |
3399 | const drflac_uint32 t[2] = {0x00000000, 0xFFFFFFFF}; |
3400 | |
3401 | riceParamMask = (drflac_uint32)~((~0UL) << riceParam); |
3402 | riceParamMask128 = _mm_set1_epi32(riceParamMask); |
3403 | |
3404 | /* Pre-load. */ |
3405 | coefficients128_0 = _mm_setzero_si128(); |
3406 | coefficients128_4 = _mm_setzero_si128(); |
3407 | coefficients128_8 = _mm_setzero_si128(); |
3408 | |
3409 | samples128_0 = _mm_setzero_si128(); |
3410 | samples128_4 = _mm_setzero_si128(); |
3411 | samples128_8 = _mm_setzero_si128(); |
3412 | |
3413 | /* |
3414 | Pre-loading the coefficients and prior samples is annoying because we need to ensure we don't try reading more than |
3415 | what's available in the input buffers. It would be convenient to use a fall-through switch to do this, but this results |
3416 | in strict aliasing warnings with GCC. To work around this I'm just doing something hacky. This feels a bit convoluted |
3417 | so I think there's opportunity for this to be simplified. |
3418 | */ |
3419 | #if 1 |
3420 | { |
3421 | int runningOrder = order; |
3422 | |
3423 | /* 0 - 3. */ |
3424 | if (runningOrder >= 4) { |
3425 | coefficients128_0 = _mm_loadu_si128((const __m128i*)(coefficients + 0)); |
3426 | samples128_0 = _mm_loadu_si128((const __m128i*)(pSamplesOut - 4)); |
3427 | runningOrder -= 4; |
3428 | } else { |
3429 | switch (runningOrder) { |
3430 | 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; |
3431 | 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; |
3432 | case 1: coefficients128_0 = _mm_set_epi32(0, 0, 0, coefficients[0]); samples128_0 = _mm_set_epi32(pSamplesOut[-1], 0, 0, 0); break; |
3433 | } |
3434 | runningOrder = 0; |
3435 | } |
3436 | |
3437 | /* 4 - 7 */ |
3438 | if (runningOrder >= 4) { |
3439 | coefficients128_4 = _mm_loadu_si128((const __m128i*)(coefficients + 4)); |
3440 | samples128_4 = _mm_loadu_si128((const __m128i*)(pSamplesOut - 8)); |
3441 | runningOrder -= 4; |
3442 | } else { |
3443 | switch (runningOrder) { |
3444 | 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; |
3445 | 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; |
3446 | case 1: coefficients128_4 = _mm_set_epi32(0, 0, 0, coefficients[4]); samples128_4 = _mm_set_epi32(pSamplesOut[-5], 0, 0, 0); break; |
3447 | } |
3448 | runningOrder = 0; |
3449 | } |
3450 | |
3451 | /* 8 - 11 */ |
3452 | if (runningOrder == 4) { |
3453 | coefficients128_8 = _mm_loadu_si128((const __m128i*)(coefficients + 8)); |
3454 | samples128_8 = _mm_loadu_si128((const __m128i*)(pSamplesOut - 12)); |
3455 | runningOrder -= 4; |
3456 | } else { |
3457 | switch (runningOrder) { |
3458 | 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; |
3459 | 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; |
3460 | case 1: coefficients128_8 = _mm_set_epi32(0, 0, 0, coefficients[8]); samples128_8 = _mm_set_epi32(pSamplesOut[-9], 0, 0, 0); break; |
3461 | } |
3462 | runningOrder = 0; |
3463 | } |
3464 | |
3465 | /* Coefficients need to be shuffled for our streaming algorithm below to work. Samples are already in the correct order from the loading routine above. */ |
3466 | coefficients128_0 = _mm_shuffle_epi32(coefficients128_0, _MM_SHUFFLE(0, 1, 2, 3)); |
3467 | coefficients128_4 = _mm_shuffle_epi32(coefficients128_4, _MM_SHUFFLE(0, 1, 2, 3)); |
3468 | coefficients128_8 = _mm_shuffle_epi32(coefficients128_8, _MM_SHUFFLE(0, 1, 2, 3)); |
3469 | } |
3470 | #else |
3471 | /* This causes strict-aliasing warnings with GCC. */ |
3472 | switch (order) |
3473 | { |
3474 | case 12: ((drflac_int32*)&coefficients128_8)[0] = coefficients[11]; ((drflac_int32*)&samples128_8)[0] = pDecodedSamples[-12]; |
3475 | case 11: ((drflac_int32*)&coefficients128_8)[1] = coefficients[10]; ((drflac_int32*)&samples128_8)[1] = pDecodedSamples[-11]; |
3476 | case 10: ((drflac_int32*)&coefficients128_8)[2] = coefficients[ 9]; ((drflac_int32*)&samples128_8)[2] = pDecodedSamples[-10]; |
3477 | case 9: ((drflac_int32*)&coefficients128_8)[3] = coefficients[ 8]; ((drflac_int32*)&samples128_8)[3] = pDecodedSamples[- 9]; |
3478 | case 8: ((drflac_int32*)&coefficients128_4)[0] = coefficients[ 7]; ((drflac_int32*)&samples128_4)[0] = pDecodedSamples[- 8]; |
3479 | case 7: ((drflac_int32*)&coefficients128_4)[1] = coefficients[ 6]; ((drflac_int32*)&samples128_4)[1] = pDecodedSamples[- 7]; |
3480 | case 6: ((drflac_int32*)&coefficients128_4)[2] = coefficients[ 5]; ((drflac_int32*)&samples128_4)[2] = pDecodedSamples[- 6]; |
3481 | case 5: ((drflac_int32*)&coefficients128_4)[3] = coefficients[ 4]; ((drflac_int32*)&samples128_4)[3] = pDecodedSamples[- 5]; |
3482 | case 4: ((drflac_int32*)&coefficients128_0)[0] = coefficients[ 3]; ((drflac_int32*)&samples128_0)[0] = pDecodedSamples[- 4]; |
3483 | case 3: ((drflac_int32*)&coefficients128_0)[1] = coefficients[ 2]; ((drflac_int32*)&samples128_0)[1] = pDecodedSamples[- 3]; |
3484 | case 2: ((drflac_int32*)&coefficients128_0)[2] = coefficients[ 1]; ((drflac_int32*)&samples128_0)[2] = pDecodedSamples[- 2]; |
3485 | case 1: ((drflac_int32*)&coefficients128_0)[3] = coefficients[ 0]; ((drflac_int32*)&samples128_0)[3] = pDecodedSamples[- 1]; |
3486 | } |
3487 | #endif |
3488 | |
3489 | /* For this version we are doing one sample at a time. */ |
3490 | while (pDecodedSamples < pDecodedSamplesEnd) { |
3491 | __m128i prediction128; |
3492 | __m128i zeroCountPart128; |
3493 | __m128i riceParamPart128; |
3494 | |
3495 | if (!drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts0, &riceParamParts0) || |
3496 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts1, &riceParamParts1) || |
3497 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts2, &riceParamParts2) || |
3498 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts3, &riceParamParts3)) { |
3499 | return DRFLAC_FALSE; |
3500 | } |
3501 | |
3502 | zeroCountPart128 = _mm_set_epi32(zeroCountParts3, zeroCountParts2, zeroCountParts1, zeroCountParts0); |
3503 | riceParamPart128 = _mm_set_epi32(riceParamParts3, riceParamParts2, riceParamParts1, riceParamParts0); |
3504 | |
3505 | riceParamPart128 = _mm_and_si128(riceParamPart128, riceParamMask128); |
3506 | riceParamPart128 = _mm_or_si128(riceParamPart128, _mm_slli_epi32(zeroCountPart128, riceParam)); |
3507 | 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 */ |
3508 | /*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... */ |
3509 | |
3510 | if (order <= 4) { |
3511 | for (i = 0; i < 4; i += 1) { |
3512 | prediction128 = _mm_mullo_epi32(coefficients128_0, samples128_0); |
3513 | |
3514 | /* Horizontal add and shift. */ |
3515 | prediction128 = drflac__mm_hadd_epi32(prediction128); |
3516 | prediction128 = _mm_srai_epi32(prediction128, shift); |
3517 | prediction128 = _mm_add_epi32(riceParamPart128, prediction128); |
3518 | |
3519 | samples128_0 = _mm_alignr_epi8(prediction128, samples128_0, 4); |
3520 | riceParamPart128 = _mm_alignr_epi8(_mm_setzero_si128(), riceParamPart128, 4); |
3521 | } |
3522 | } else if (order <= 8) { |
3523 | for (i = 0; i < 4; i += 1) { |
3524 | prediction128 = _mm_mullo_epi32(coefficients128_4, samples128_4); |
3525 | prediction128 = _mm_add_epi32(prediction128, _mm_mullo_epi32(coefficients128_0, samples128_0)); |
3526 | |
3527 | /* Horizontal add and shift. */ |
3528 | prediction128 = drflac__mm_hadd_epi32(prediction128); |
3529 | prediction128 = _mm_srai_epi32(prediction128, shift); |
3530 | prediction128 = _mm_add_epi32(riceParamPart128, prediction128); |
3531 | |
3532 | samples128_4 = _mm_alignr_epi8(samples128_0, samples128_4, 4); |
3533 | samples128_0 = _mm_alignr_epi8(prediction128, samples128_0, 4); |
3534 | riceParamPart128 = _mm_alignr_epi8(_mm_setzero_si128(), riceParamPart128, 4); |
3535 | } |
3536 | } else { |
3537 | for (i = 0; i < 4; i += 1) { |
3538 | prediction128 = _mm_mullo_epi32(coefficients128_8, samples128_8); |
3539 | prediction128 = _mm_add_epi32(prediction128, _mm_mullo_epi32(coefficients128_4, samples128_4)); |
3540 | prediction128 = _mm_add_epi32(prediction128, _mm_mullo_epi32(coefficients128_0, samples128_0)); |
3541 | |
3542 | /* Horizontal add and shift. */ |
3543 | prediction128 = drflac__mm_hadd_epi32(prediction128); |
3544 | prediction128 = _mm_srai_epi32(prediction128, shift); |
3545 | prediction128 = _mm_add_epi32(riceParamPart128, prediction128); |
3546 | |
3547 | samples128_8 = _mm_alignr_epi8(samples128_4, samples128_8, 4); |
3548 | samples128_4 = _mm_alignr_epi8(samples128_0, samples128_4, 4); |
3549 | samples128_0 = _mm_alignr_epi8(prediction128, samples128_0, 4); |
3550 | riceParamPart128 = _mm_alignr_epi8(_mm_setzero_si128(), riceParamPart128, 4); |
3551 | } |
3552 | } |
3553 | |
3554 | /* We store samples in groups of 4. */ |
3555 | _mm_storeu_si128((__m128i*)pDecodedSamples, samples128_0); |
3556 | pDecodedSamples += 4; |
3557 | } |
3558 | |
3559 | /* Make sure we process the last few samples. */ |
3560 | i = (count & ~3); |
3561 | while (i < (int)count) { |
3562 | /* Rice extraction. */ |
3563 | if (!drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts0, &riceParamParts0)) { |
3564 | return DRFLAC_FALSE; |
3565 | } |
3566 | |
3567 | /* Rice reconstruction. */ |
3568 | riceParamParts0 &= riceParamMask; |
3569 | riceParamParts0 |= (zeroCountParts0 << riceParam); |
3570 | riceParamParts0 = (riceParamParts0 >> 1) ^ t[riceParamParts0 & 0x01]; |
3571 | |
3572 | /* Sample reconstruction. */ |
3573 | pDecodedSamples[0] = riceParamParts0 + drflac__calculate_prediction_32(order, shift, coefficients, pDecodedSamples); |
3574 | |
3575 | i += 1; |
3576 | pDecodedSamples += 1; |
3577 | } |
3578 | |
3579 | return DRFLAC_TRUE; |
3580 | } |
3581 | |
3582 | 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) |
3583 | { |
3584 | int i; |
3585 | drflac_uint32 riceParamMask; |
3586 | drflac_int32* pDecodedSamples = pSamplesOut; |
3587 | drflac_int32* pDecodedSamplesEnd = pSamplesOut + (count & ~3); |
3588 | drflac_uint32 zeroCountParts0 = 0; |
3589 | drflac_uint32 zeroCountParts1 = 0; |
3590 | drflac_uint32 zeroCountParts2 = 0; |
3591 | drflac_uint32 zeroCountParts3 = 0; |
3592 | drflac_uint32 riceParamParts0 = 0; |
3593 | drflac_uint32 riceParamParts1 = 0; |
3594 | drflac_uint32 riceParamParts2 = 0; |
3595 | drflac_uint32 riceParamParts3 = 0; |
3596 | __m128i coefficients128_0; |
3597 | __m128i coefficients128_4; |
3598 | __m128i coefficients128_8; |
3599 | __m128i samples128_0; |
3600 | __m128i samples128_4; |
3601 | __m128i samples128_8; |
3602 | __m128i prediction128; |
3603 | __m128i riceParamMask128; |
3604 | |
3605 | const drflac_uint32 t[2] = {0x00000000, 0xFFFFFFFF}; |
3606 | |
3607 | DRFLAC_ASSERT(order <= 12); |
3608 | |
3609 | riceParamMask = (drflac_uint32)~((~0UL) << riceParam); |
3610 | riceParamMask128 = _mm_set1_epi32(riceParamMask); |
3611 | |
3612 | prediction128 = _mm_setzero_si128(); |
3613 | |
3614 | /* Pre-load. */ |
3615 | coefficients128_0 = _mm_setzero_si128(); |
3616 | coefficients128_4 = _mm_setzero_si128(); |
3617 | coefficients128_8 = _mm_setzero_si128(); |
3618 | |
3619 | samples128_0 = _mm_setzero_si128(); |
3620 | samples128_4 = _mm_setzero_si128(); |
3621 | samples128_8 = _mm_setzero_si128(); |
3622 | |
3623 | #if 1 |
3624 | { |
3625 | int runningOrder = order; |
3626 | |
3627 | /* 0 - 3. */ |
3628 | if (runningOrder >= 4) { |
3629 | coefficients128_0 = _mm_loadu_si128((const __m128i*)(coefficients + 0)); |
3630 | samples128_0 = _mm_loadu_si128((const __m128i*)(pSamplesOut - 4)); |
3631 | runningOrder -= 4; |
3632 | } else { |
3633 | switch (runningOrder) { |
3634 | 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; |
3635 | 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; |
3636 | case 1: coefficients128_0 = _mm_set_epi32(0, 0, 0, coefficients[0]); samples128_0 = _mm_set_epi32(pSamplesOut[-1], 0, 0, 0); break; |
3637 | } |
3638 | runningOrder = 0; |
3639 | } |
3640 | |
3641 | /* 4 - 7 */ |
3642 | if (runningOrder >= 4) { |
3643 | coefficients128_4 = _mm_loadu_si128((const __m128i*)(coefficients + 4)); |
3644 | samples128_4 = _mm_loadu_si128((const __m128i*)(pSamplesOut - 8)); |
3645 | runningOrder -= 4; |
3646 | } else { |
3647 | switch (runningOrder) { |
3648 | 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; |
3649 | 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; |
3650 | case 1: coefficients128_4 = _mm_set_epi32(0, 0, 0, coefficients[4]); samples128_4 = _mm_set_epi32(pSamplesOut[-5], 0, 0, 0); break; |
3651 | } |
3652 | runningOrder = 0; |
3653 | } |
3654 | |
3655 | /* 8 - 11 */ |
3656 | if (runningOrder == 4) { |
3657 | coefficients128_8 = _mm_loadu_si128((const __m128i*)(coefficients + 8)); |
3658 | samples128_8 = _mm_loadu_si128((const __m128i*)(pSamplesOut - 12)); |
3659 | runningOrder -= 4; |
3660 | } else { |
3661 | switch (runningOrder) { |
3662 | 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; |
3663 | 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; |
3664 | case 1: coefficients128_8 = _mm_set_epi32(0, 0, 0, coefficients[8]); samples128_8 = _mm_set_epi32(pSamplesOut[-9], 0, 0, 0); break; |
3665 | } |
3666 | runningOrder = 0; |
3667 | } |
3668 | |
3669 | /* Coefficients need to be shuffled for our streaming algorithm below to work. Samples are already in the correct order from the loading routine above. */ |
3670 | coefficients128_0 = _mm_shuffle_epi32(coefficients128_0, _MM_SHUFFLE(0, 1, 2, 3)); |
3671 | coefficients128_4 = _mm_shuffle_epi32(coefficients128_4, _MM_SHUFFLE(0, 1, 2, 3)); |
3672 | coefficients128_8 = _mm_shuffle_epi32(coefficients128_8, _MM_SHUFFLE(0, 1, 2, 3)); |
3673 | } |
3674 | #else |
3675 | switch (order) |
3676 | { |
3677 | case 12: ((drflac_int32*)&coefficients128_8)[0] = coefficients[11]; ((drflac_int32*)&samples128_8)[0] = pDecodedSamples[-12]; |
3678 | case 11: ((drflac_int32*)&coefficients128_8)[1] = coefficients[10]; ((drflac_int32*)&samples128_8)[1] = pDecodedSamples[-11]; |
3679 | case 10: ((drflac_int32*)&coefficients128_8)[2] = coefficients[ 9]; ((drflac_int32*)&samples128_8)[2] = pDecodedSamples[-10]; |
3680 | case 9: ((drflac_int32*)&coefficients128_8)[3] = coefficients[ 8]; ((drflac_int32*)&samples128_8)[3] = pDecodedSamples[- 9]; |
3681 | case 8: ((drflac_int32*)&coefficients128_4)[0] = coefficients[ 7]; ((drflac_int32*)&samples128_4)[0] = pDecodedSamples[- 8]; |
3682 | case 7: ((drflac_int32*)&coefficients128_4)[1] = coefficients[ 6]; ((drflac_int32*)&samples128_4)[1] = pDecodedSamples[- 7]; |
3683 | case 6: ((drflac_int32*)&coefficients128_4)[2] = coefficients[ 5]; ((drflac_int32*)&samples128_4)[2] = pDecodedSamples[- 6]; |
3684 | case 5: ((drflac_int32*)&coefficients128_4)[3] = coefficients[ 4]; ((drflac_int32*)&samples128_4)[3] = pDecodedSamples[- 5]; |
3685 | case 4: ((drflac_int32*)&coefficients128_0)[0] = coefficients[ 3]; ((drflac_int32*)&samples128_0)[0] = pDecodedSamples[- 4]; |
3686 | case 3: ((drflac_int32*)&coefficients128_0)[1] = coefficients[ 2]; ((drflac_int32*)&samples128_0)[1] = pDecodedSamples[- 3]; |
3687 | case 2: ((drflac_int32*)&coefficients128_0)[2] = coefficients[ 1]; ((drflac_int32*)&samples128_0)[2] = pDecodedSamples[- 2]; |
3688 | case 1: ((drflac_int32*)&coefficients128_0)[3] = coefficients[ 0]; ((drflac_int32*)&samples128_0)[3] = pDecodedSamples[- 1]; |
3689 | } |
3690 | #endif |
3691 | |
3692 | /* For this version we are doing one sample at a time. */ |
3693 | while (pDecodedSamples < pDecodedSamplesEnd) { |
3694 | __m128i zeroCountPart128; |
3695 | __m128i riceParamPart128; |
3696 | |
3697 | if (!drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts0, &riceParamParts0) || |
3698 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts1, &riceParamParts1) || |
3699 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts2, &riceParamParts2) || |
3700 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts3, &riceParamParts3)) { |
3701 | return DRFLAC_FALSE; |
3702 | } |
3703 | |
3704 | zeroCountPart128 = _mm_set_epi32(zeroCountParts3, zeroCountParts2, zeroCountParts1, zeroCountParts0); |
3705 | riceParamPart128 = _mm_set_epi32(riceParamParts3, riceParamParts2, riceParamParts1, riceParamParts0); |
3706 | |
3707 | riceParamPart128 = _mm_and_si128(riceParamPart128, riceParamMask128); |
3708 | riceParamPart128 = _mm_or_si128(riceParamPart128, _mm_slli_epi32(zeroCountPart128, riceParam)); |
3709 | 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))); |
3710 | |
3711 | for (i = 0; i < 4; i += 1) { |
3712 | prediction128 = _mm_xor_si128(prediction128, prediction128); /* Reset to 0. */ |
3713 | |
3714 | switch (order) |
3715 | { |
3716 | case 12: |
3717 | 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)))); |
3718 | case 10: |
3719 | 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)))); |
3720 | case 8: |
3721 | 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)))); |
3722 | case 6: |
3723 | 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)))); |
3724 | case 4: |
3725 | 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)))); |
3726 | case 2: |
3727 | 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)))); |
3728 | } |
3729 | |
3730 | /* Horizontal add and shift. */ |
3731 | prediction128 = drflac__mm_hadd_epi64(prediction128); |
3732 | prediction128 = drflac__mm_srai_epi64(prediction128, shift); |
3733 | prediction128 = _mm_add_epi32(riceParamPart128, prediction128); |
3734 | |
3735 | /* Our value should be sitting in prediction128[0]. We need to combine this with our SSE samples. */ |
3736 | samples128_8 = _mm_alignr_epi8(samples128_4, samples128_8, 4); |
3737 | samples128_4 = _mm_alignr_epi8(samples128_0, samples128_4, 4); |
3738 | samples128_0 = _mm_alignr_epi8(prediction128, samples128_0, 4); |
3739 | |
3740 | /* Slide our rice parameter down so that the value in position 0 contains the next one to process. */ |
3741 | riceParamPart128 = _mm_alignr_epi8(_mm_setzero_si128(), riceParamPart128, 4); |
3742 | } |
3743 | |
3744 | /* We store samples in groups of 4. */ |
3745 | _mm_storeu_si128((__m128i*)pDecodedSamples, samples128_0); |
3746 | pDecodedSamples += 4; |
3747 | } |
3748 | |
3749 | /* Make sure we process the last few samples. */ |
3750 | i = (count & ~3); |
3751 | while (i < (int)count) { |
3752 | /* Rice extraction. */ |
3753 | if (!drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts0, &riceParamParts0)) { |
3754 | return DRFLAC_FALSE; |
3755 | } |
3756 | |
3757 | /* Rice reconstruction. */ |
3758 | riceParamParts0 &= riceParamMask; |
3759 | riceParamParts0 |= (zeroCountParts0 << riceParam); |
3760 | riceParamParts0 = (riceParamParts0 >> 1) ^ t[riceParamParts0 & 0x01]; |
3761 | |
3762 | /* Sample reconstruction. */ |
3763 | pDecodedSamples[0] = riceParamParts0 + drflac__calculate_prediction_64(order, shift, coefficients, pDecodedSamples); |
3764 | |
3765 | i += 1; |
3766 | pDecodedSamples += 1; |
3767 | } |
3768 | |
3769 | return DRFLAC_TRUE; |
3770 | } |
3771 | |
3772 | 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) |
3773 | { |
3774 | DRFLAC_ASSERT(bs != NULL); |
3775 | DRFLAC_ASSERT(count > 0); |
3776 | DRFLAC_ASSERT(pSamplesOut != NULL); |
3777 | |
3778 | /* 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. */ |
3779 | if (order > 0 && order <= 12) { |
3780 | if (bitsPerSample+shift > 32) { |
3781 | return drflac__decode_samples_with_residual__rice__sse41_64(bs, count, riceParam, order, shift, coefficients, pSamplesOut); |
3782 | } else { |
3783 | return drflac__decode_samples_with_residual__rice__sse41_32(bs, count, riceParam, order, shift, coefficients, pSamplesOut); |
3784 | } |
3785 | } else { |
3786 | return drflac__decode_samples_with_residual__rice__scalar(bs, bitsPerSample, count, riceParam, order, shift, coefficients, pSamplesOut); |
3787 | } |
3788 | } |
3789 | #endif |
3790 | |
3791 | #if defined(DRFLAC_SUPPORT_NEON) |
3792 | static DRFLAC_INLINE void drflac__vst2q_s32(drflac_int32* p, int32x4x2_t x) |
3793 | { |
3794 | vst1q_s32(p+0, x.val[0]); |
3795 | vst1q_s32(p+4, x.val[1]); |
3796 | } |
3797 | |
3798 | static DRFLAC_INLINE void drflac__vst2q_u32(drflac_uint32* p, uint32x4x2_t x) |
3799 | { |
3800 | vst1q_u32(p+0, x.val[0]); |
3801 | vst1q_u32(p+4, x.val[1]); |
3802 | } |
3803 | |
3804 | static DRFLAC_INLINE void drflac__vst2q_f32(float* p, float32x4x2_t x) |
3805 | { |
3806 | vst1q_f32(p+0, x.val[0]); |
3807 | vst1q_f32(p+4, x.val[1]); |
3808 | } |
3809 | |
3810 | static DRFLAC_INLINE void drflac__vst2q_s16(drflac_int16* p, int16x4x2_t x) |
3811 | { |
3812 | vst1q_s16(p, vcombine_s16(x.val[0], x.val[1])); |
3813 | } |
3814 | |
3815 | static DRFLAC_INLINE void drflac__vst2q_u16(drflac_uint16* p, uint16x4x2_t x) |
3816 | { |
3817 | vst1q_u16(p, vcombine_u16(x.val[0], x.val[1])); |
3818 | } |
3819 | |
3820 | static DRFLAC_INLINE int32x4_t drflac__vdupq_n_s32x4(drflac_int32 x3, drflac_int32 x2, drflac_int32 x1, drflac_int32 x0) |
3821 | { |
3822 | drflac_int32 x[4]; |
3823 | x[3] = x3; |
3824 | x[2] = x2; |
3825 | x[1] = x1; |
3826 | x[0] = x0; |
3827 | return vld1q_s32(x); |
3828 | } |
3829 | |
3830 | static DRFLAC_INLINE int32x4_t drflac__valignrq_s32_1(int32x4_t a, int32x4_t b) |
3831 | { |
3832 | /* Equivalent to SSE's _mm_alignr_epi8(a, b, 4) */ |
3833 | |
3834 | /* Reference */ |
3835 | /*return drflac__vdupq_n_s32x4( |
3836 | vgetq_lane_s32(a, 0), |
3837 | vgetq_lane_s32(b, 3), |
3838 | vgetq_lane_s32(b, 2), |
3839 | vgetq_lane_s32(b, 1) |
3840 | );*/ |
3841 | |
3842 | return vextq_s32(b, a, 1); |
3843 | } |
3844 | |
3845 | static DRFLAC_INLINE uint32x4_t drflac__valignrq_u32_1(uint32x4_t a, uint32x4_t b) |
3846 | { |
3847 | /* Equivalent to SSE's _mm_alignr_epi8(a, b, 4) */ |
3848 | |
3849 | /* Reference */ |
3850 | /*return drflac__vdupq_n_s32x4( |
3851 | vgetq_lane_s32(a, 0), |
3852 | vgetq_lane_s32(b, 3), |
3853 | vgetq_lane_s32(b, 2), |
3854 | vgetq_lane_s32(b, 1) |
3855 | );*/ |
3856 | |
3857 | return vextq_u32(b, a, 1); |
3858 | } |
3859 | |
3860 | static DRFLAC_INLINE int32x2_t drflac__vhaddq_s32(int32x4_t x) |
3861 | { |
3862 | /* The sum must end up in position 0. */ |
3863 | |
3864 | /* Reference */ |
3865 | /*return vdupq_n_s32( |
3866 | vgetq_lane_s32(x, 3) + |
3867 | vgetq_lane_s32(x, 2) + |
3868 | vgetq_lane_s32(x, 1) + |
3869 | vgetq_lane_s32(x, 0) |
3870 | );*/ |
3871 | |
3872 | int32x2_t r = vadd_s32(vget_high_s32(x), vget_low_s32(x)); |
3873 | return vpadd_s32(r, r); |
3874 | } |
3875 | |
3876 | static DRFLAC_INLINE int64x1_t drflac__vhaddq_s64(int64x2_t x) |
3877 | { |
3878 | return vadd_s64(vget_high_s64(x), vget_low_s64(x)); |
3879 | } |
3880 | |
3881 | static DRFLAC_INLINE int32x4_t drflac__vrevq_s32(int32x4_t x) |
3882 | { |
3883 | /* Reference */ |
3884 | /*return drflac__vdupq_n_s32x4( |
3885 | vgetq_lane_s32(x, 0), |
3886 | vgetq_lane_s32(x, 1), |
3887 | vgetq_lane_s32(x, 2), |
3888 | vgetq_lane_s32(x, 3) |
3889 | );*/ |
3890 | |
3891 | return vrev64q_s32(vcombine_s32(vget_high_s32(x), vget_low_s32(x))); |
3892 | } |
3893 | |
3894 | static DRFLAC_INLINE int32x4_t drflac__vnotq_s32(int32x4_t x) |
3895 | { |
3896 | return veorq_s32(x, vdupq_n_s32(0xFFFFFFFF)); |
3897 | } |
3898 | |
3899 | static DRFLAC_INLINE uint32x4_t drflac__vnotq_u32(uint32x4_t x) |
3900 | { |
3901 | return veorq_u32(x, vdupq_n_u32(0xFFFFFFFF)); |
3902 | } |
3903 | |
3904 | 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) |
3905 | { |
3906 | int i; |
3907 | drflac_uint32 riceParamMask; |
3908 | drflac_int32* pDecodedSamples = pSamplesOut; |
3909 | drflac_int32* pDecodedSamplesEnd = pSamplesOut + (count & ~3); |
3910 | drflac_uint32 zeroCountParts[4]; |
3911 | drflac_uint32 riceParamParts[4]; |
3912 | int32x4_t coefficients128_0; |
3913 | int32x4_t coefficients128_4; |
3914 | int32x4_t coefficients128_8; |
3915 | int32x4_t samples128_0; |
3916 | int32x4_t samples128_4; |
3917 | int32x4_t samples128_8; |
3918 | uint32x4_t riceParamMask128; |
3919 | int32x4_t riceParam128; |
3920 | int32x2_t shift64; |
3921 | uint32x4_t one128; |
3922 | |
3923 | const drflac_uint32 t[2] = {0x00000000, 0xFFFFFFFF}; |
3924 | |
3925 | riceParamMask = ~((~0UL) << riceParam); |
3926 | riceParamMask128 = vdupq_n_u32(riceParamMask); |
3927 | |
3928 | riceParam128 = vdupq_n_s32(riceParam); |
3929 | shift64 = vdup_n_s32(-shift); /* Negate the shift because we'll be doing a variable shift using vshlq_s32(). */ |
3930 | one128 = vdupq_n_u32(1); |
3931 | |
3932 | /* |
3933 | Pre-loading the coefficients and prior samples is annoying because we need to ensure we don't try reading more than |
3934 | what's available in the input buffers. It would be conenient to use a fall-through switch to do this, but this results |
3935 | in strict aliasing warnings with GCC. To work around this I'm just doing something hacky. This feels a bit convoluted |
3936 | so I think there's opportunity for this to be simplified. |
3937 | */ |
3938 | { |
3939 | int runningOrder = order; |
3940 | drflac_int32 tempC[4] = {0, 0, 0, 0}; |
3941 | drflac_int32 tempS[4] = {0, 0, 0, 0}; |
3942 | |
3943 | /* 0 - 3. */ |
3944 | if (runningOrder >= 4) { |
3945 | coefficients128_0 = vld1q_s32(coefficients + 0); |
3946 | samples128_0 = vld1q_s32(pSamplesOut - 4); |
3947 | runningOrder -= 4; |
3948 | } else { |
3949 | switch (runningOrder) { |
3950 | case 3: tempC[2] = coefficients[2]; tempS[1] = pSamplesOut[-3]; /* fallthrough */ |
3951 | case 2: tempC[1] = coefficients[1]; tempS[2] = pSamplesOut[-2]; /* fallthrough */ |
3952 | case 1: tempC[0] = coefficients[0]; tempS[3] = pSamplesOut[-1]; /* fallthrough */ |
3953 | } |
3954 | |
3955 | coefficients128_0 = vld1q_s32(tempC); |
3956 | samples128_0 = vld1q_s32(tempS); |
3957 | runningOrder = 0; |
3958 | } |
3959 | |
3960 | /* 4 - 7 */ |
3961 | if (runningOrder >= 4) { |
3962 | coefficients128_4 = vld1q_s32(coefficients + 4); |
3963 | samples128_4 = vld1q_s32(pSamplesOut - 8); |
3964 | runningOrder -= 4; |
3965 | } else { |
3966 | switch (runningOrder) { |
3967 | case 3: tempC[2] = coefficients[6]; tempS[1] = pSamplesOut[-7]; /* fallthrough */ |
3968 | case 2: tempC[1] = coefficients[5]; tempS[2] = pSamplesOut[-6]; /* fallthrough */ |
3969 | case 1: tempC[0] = coefficients[4]; tempS[3] = pSamplesOut[-5]; /* fallthrough */ |
3970 | } |
3971 | |
3972 | coefficients128_4 = vld1q_s32(tempC); |
3973 | samples128_4 = vld1q_s32(tempS); |
3974 | runningOrder = 0; |
3975 | } |
3976 | |
3977 | /* 8 - 11 */ |
3978 | if (runningOrder == 4) { |
3979 | coefficients128_8 = vld1q_s32(coefficients + 8); |
3980 | samples128_8 = vld1q_s32(pSamplesOut - 12); |
3981 | runningOrder -= 4; |
3982 | } else { |
3983 | switch (runningOrder) { |
3984 | case 3: tempC[2] = coefficients[10]; tempS[1] = pSamplesOut[-11]; /* fallthrough */ |
3985 | case 2: tempC[1] = coefficients[ 9]; tempS[2] = pSamplesOut[-10]; /* fallthrough */ |
3986 | case 1: tempC[0] = coefficients[ 8]; tempS[3] = pSamplesOut[- 9]; /* fallthrough */ |
3987 | } |
3988 | |
3989 | coefficients128_8 = vld1q_s32(tempC); |
3990 | samples128_8 = vld1q_s32(tempS); |
3991 | runningOrder = 0; |
3992 | } |
3993 | |
3994 | /* Coefficients need to be shuffled for our streaming algorithm below to work. Samples are already in the correct order from the loading routine above. */ |
3995 | coefficients128_0 = drflac__vrevq_s32(coefficients128_0); |
3996 | coefficients128_4 = drflac__vrevq_s32(coefficients128_4); |
3997 | coefficients128_8 = drflac__vrevq_s32(coefficients128_8); |
3998 | } |
3999 | |
4000 | /* For this version we are doing one sample at a time. */ |
4001 | while (pDecodedSamples < pDecodedSamplesEnd) { |
4002 | int32x4_t prediction128; |
4003 | int32x2_t prediction64; |
4004 | uint32x4_t zeroCountPart128; |
4005 | uint32x4_t riceParamPart128; |
4006 | |
4007 | if (!drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts[0], &riceParamParts[0]) || |
4008 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts[1], &riceParamParts[1]) || |
4009 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts[2], &riceParamParts[2]) || |
4010 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts[3], &riceParamParts[3])) { |
4011 | return DRFLAC_FALSE; |
4012 | } |
4013 | |
4014 | zeroCountPart128 = vld1q_u32(zeroCountParts); |
4015 | riceParamPart128 = vld1q_u32(riceParamParts); |
4016 | |
4017 | riceParamPart128 = vandq_u32(riceParamPart128, riceParamMask128); |
4018 | riceParamPart128 = vorrq_u32(riceParamPart128, vshlq_u32(zeroCountPart128, riceParam128)); |
4019 | riceParamPart128 = veorq_u32(vshrq_n_u32(riceParamPart128, 1), vaddq_u32(drflac__vnotq_u32(vandq_u32(riceParamPart128, one128)), one128)); |
4020 | |
4021 | if (order <= 4) { |
4022 | for (i = 0; i < 4; i += 1) { |
4023 | prediction128 = vmulq_s32(coefficients128_0, samples128_0); |
4024 | |
4025 | /* Horizontal add and shift. */ |
4026 | prediction64 = drflac__vhaddq_s32(prediction128); |
4027 | prediction64 = vshl_s32(prediction64, shift64); |
4028 | prediction64 = vadd_s32(prediction64, vget_low_s32(vreinterpretq_s32_u32(riceParamPart128))); |
4029 | |
4030 | samples128_0 = drflac__valignrq_s32_1(vcombine_s32(prediction64, vdup_n_s32(0)), samples128_0); |
4031 | riceParamPart128 = drflac__valignrq_u32_1(vdupq_n_u32(0), riceParamPart128); |
4032 | } |
4033 | } else if (order <= 8) { |
4034 | for (i = 0; i < 4; i += 1) { |
4035 | prediction128 = vmulq_s32(coefficients128_4, samples128_4); |
4036 | prediction128 = vmlaq_s32(prediction128, coefficients128_0, samples128_0); |
4037 | |
4038 | /* Horizontal add and shift. */ |
4039 | prediction64 = drflac__vhaddq_s32(prediction128); |
4040 | prediction64 = vshl_s32(prediction64, shift64); |
4041 | prediction64 = vadd_s32(prediction64, vget_low_s32(vreinterpretq_s32_u32(riceParamPart128))); |
4042 | |
4043 | samples128_4 = drflac__valignrq_s32_1(samples128_0, samples128_4); |
4044 | samples128_0 = drflac__valignrq_s32_1(vcombine_s32(prediction64, vdup_n_s32(0)), samples128_0); |
4045 | riceParamPart128 = drflac__valignrq_u32_1(vdupq_n_u32(0), riceParamPart128); |
4046 | } |
4047 | } else { |
4048 | for (i = 0; i < 4; i += 1) { |
4049 | prediction128 = vmulq_s32(coefficients128_8, samples128_8); |
4050 | prediction128 = vmlaq_s32(prediction128, coefficients128_4, samples128_4); |
4051 | prediction128 = vmlaq_s32(prediction128, coefficients128_0, samples128_0); |
4052 | |
4053 | /* Horizontal add and shift. */ |
4054 | prediction64 = drflac__vhaddq_s32(prediction128); |
4055 | prediction64 = vshl_s32(prediction64, shift64); |
4056 | prediction64 = vadd_s32(prediction64, vget_low_s32(vreinterpretq_s32_u32(riceParamPart128))); |
4057 | |
4058 | samples128_8 = drflac__valignrq_s32_1(samples128_4, samples128_8); |
4059 | samples128_4 = drflac__valignrq_s32_1(samples128_0, samples128_4); |
4060 | samples128_0 = drflac__valignrq_s32_1(vcombine_s32(prediction64, vdup_n_s32(0)), samples128_0); |
4061 | riceParamPart128 = drflac__valignrq_u32_1(vdupq_n_u32(0), riceParamPart128); |
4062 | } |
4063 | } |
4064 | |
4065 | /* We store samples in groups of 4. */ |
4066 | vst1q_s32(pDecodedSamples, samples128_0); |
4067 | pDecodedSamples += 4; |
4068 | } |
4069 | |
4070 | /* Make sure we process the last few samples. */ |
4071 | i = (count & ~3); |
4072 | while (i < (int)count) { |
4073 | /* Rice extraction. */ |
4074 | if (!drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts[0], &riceParamParts[0])) { |
4075 | return DRFLAC_FALSE; |
4076 | } |
4077 | |
4078 | /* Rice reconstruction. */ |
4079 | riceParamParts[0] &= riceParamMask; |
4080 | riceParamParts[0] |= (zeroCountParts[0] << riceParam); |
4081 | riceParamParts[0] = (riceParamParts[0] >> 1) ^ t[riceParamParts[0] & 0x01]; |
4082 | |
4083 | /* Sample reconstruction. */ |
4084 | pDecodedSamples[0] = riceParamParts[0] + drflac__calculate_prediction_32(order, shift, coefficients, pDecodedSamples); |
4085 | |
4086 | i += 1; |
4087 | pDecodedSamples += 1; |
4088 | } |
4089 | |
4090 | return DRFLAC_TRUE; |
4091 | } |
4092 | |
4093 | 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) |
4094 | { |
4095 | int i; |
4096 | drflac_uint32 riceParamMask; |
4097 | drflac_int32* pDecodedSamples = pSamplesOut; |
4098 | drflac_int32* pDecodedSamplesEnd = pSamplesOut + (count & ~3); |
4099 | drflac_uint32 zeroCountParts[4]; |
4100 | drflac_uint32 riceParamParts[4]; |
4101 | int32x4_t coefficients128_0; |
4102 | int32x4_t coefficients128_4; |
4103 | int32x4_t coefficients128_8; |
4104 | int32x4_t samples128_0; |
4105 | int32x4_t samples128_4; |
4106 | int32x4_t samples128_8; |
4107 | uint32x4_t riceParamMask128; |
4108 | int32x4_t riceParam128; |
4109 | int64x1_t shift64; |
4110 | uint32x4_t one128; |
4111 | |
4112 | const drflac_uint32 t[2] = {0x00000000, 0xFFFFFFFF}; |
4113 | |
4114 | riceParamMask = ~((~0UL) << riceParam); |
4115 | riceParamMask128 = vdupq_n_u32(riceParamMask); |
4116 | |
4117 | riceParam128 = vdupq_n_s32(riceParam); |
4118 | shift64 = vdup_n_s64(-shift); /* Negate the shift because we'll be doing a variable shift using vshlq_s32(). */ |
4119 | one128 = vdupq_n_u32(1); |
4120 | |
4121 | /* |
4122 | Pre-loading the coefficients and prior samples is annoying because we need to ensure we don't try reading more than |
4123 | what's available in the input buffers. It would be conenient to use a fall-through switch to do this, but this results |
4124 | in strict aliasing warnings with GCC. To work around this I'm just doing something hacky. This feels a bit convoluted |
4125 | so I think there's opportunity for this to be simplified. |
4126 | */ |
4127 | { |
4128 | int runningOrder = order; |
4129 | drflac_int32 tempC[4] = {0, 0, 0, 0}; |
4130 | drflac_int32 tempS[4] = {0, 0, 0, 0}; |
4131 | |
4132 | /* 0 - 3. */ |
4133 | if (runningOrder >= 4) { |
4134 | coefficients128_0 = vld1q_s32(coefficients + 0); |
4135 | samples128_0 = vld1q_s32(pSamplesOut - 4); |
4136 | runningOrder -= 4; |
4137 | } else { |
4138 | switch (runningOrder) { |
4139 | case 3: tempC[2] = coefficients[2]; tempS[1] = pSamplesOut[-3]; /* fallthrough */ |
4140 | case 2: tempC[1] = coefficients[1]; tempS[2] = pSamplesOut[-2]; /* fallthrough */ |
4141 | case 1: tempC[0] = coefficients[0]; tempS[3] = pSamplesOut[-1]; /* fallthrough */ |
4142 | } |
4143 | |
4144 | coefficients128_0 = vld1q_s32(tempC); |
4145 | samples128_0 = vld1q_s32(tempS); |
4146 | runningOrder = 0; |
4147 | } |
4148 | |
4149 | /* 4 - 7 */ |
4150 | if (runningOrder >= 4) { |
4151 | coefficients128_4 = vld1q_s32(coefficients + 4); |
4152 | samples128_4 = vld1q_s32(pSamplesOut - 8); |
4153 | runningOrder -= 4; |
4154 | } else { |
4155 | switch (runningOrder) { |
4156 | case 3: tempC[2] = coefficients[6]; tempS[1] = pSamplesOut[-7]; /* fallthrough */ |
4157 | case 2: tempC[1] = coefficients[5]; tempS[2] = pSamplesOut[-6]; /* fallthrough */ |
4158 | case 1: tempC[0] = coefficients[4]; tempS[3] = pSamplesOut[-5]; /* fallthrough */ |
4159 | } |
4160 | |
4161 | coefficients128_4 = vld1q_s32(tempC); |
4162 | samples128_4 = vld1q_s32(tempS); |
4163 | runningOrder = 0; |
4164 | } |
4165 | |
4166 | /* 8 - 11 */ |
4167 | if (runningOrder == 4) { |
4168 | coefficients128_8 = vld1q_s32(coefficients + 8); |
4169 | samples128_8 = vld1q_s32(pSamplesOut - 12); |
4170 | runningOrder -= 4; |
4171 | } else { |
4172 | switch (runningOrder) { |
4173 | case 3: tempC[2] = coefficients[10]; tempS[1] = pSamplesOut[-11]; /* fallthrough */ |
4174 | case 2: tempC[1] = coefficients[ 9]; tempS[2] = pSamplesOut[-10]; /* fallthrough */ |
4175 | case 1: tempC[0] = coefficients[ 8]; tempS[3] = pSamplesOut[- 9]; /* fallthrough */ |
4176 | } |
4177 | |
4178 | coefficients128_8 = vld1q_s32(tempC); |
4179 | samples128_8 = vld1q_s32(tempS); |
4180 | runningOrder = 0; |
4181 | } |
4182 | |
4183 | /* Coefficients need to be shuffled for our streaming algorithm below to work. Samples are already in the correct order from the loading routine above. */ |
4184 | coefficients128_0 = drflac__vrevq_s32(coefficients128_0); |
4185 | coefficients128_4 = drflac__vrevq_s32(coefficients128_4); |
4186 | coefficients128_8 = drflac__vrevq_s32(coefficients128_8); |
4187 | } |
4188 | |
4189 | /* For this version we are doing one sample at a time. */ |
4190 | while (pDecodedSamples < pDecodedSamplesEnd) { |
4191 | int64x2_t prediction128; |
4192 | uint32x4_t zeroCountPart128; |
4193 | uint32x4_t riceParamPart128; |
4194 | |
4195 | if (!drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts[0], &riceParamParts[0]) || |
4196 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts[1], &riceParamParts[1]) || |
4197 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts[2], &riceParamParts[2]) || |
4198 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts[3], &riceParamParts[3])) { |
4199 | return DRFLAC_FALSE; |
4200 | } |
4201 | |
4202 | zeroCountPart128 = vld1q_u32(zeroCountParts); |
4203 | riceParamPart128 = vld1q_u32(riceParamParts); |
4204 | |
4205 | riceParamPart128 = vandq_u32(riceParamPart128, riceParamMask128); |
4206 | riceParamPart128 = vorrq_u32(riceParamPart128, vshlq_u32(zeroCountPart128, riceParam128)); |
4207 | riceParamPart128 = veorq_u32(vshrq_n_u32(riceParamPart128, 1), vaddq_u32(drflac__vnotq_u32(vandq_u32(riceParamPart128, one128)), one128)); |
4208 | |
4209 | for (i = 0; i < 4; i += 1) { |
4210 | int64x1_t prediction64; |
4211 | |
4212 | prediction128 = veorq_s64(prediction128, prediction128); /* Reset to 0. */ |
4213 | switch (order) |
4214 | { |
4215 | case 12: |
4216 | case 11: prediction128 = vaddq_s64(prediction128, vmull_s32(vget_low_s32(coefficients128_8), vget_low_s32(samples128_8))); |
4217 | case 10: |
4218 | case 9: prediction128 = vaddq_s64(prediction128, vmull_s32(vget_high_s32(coefficients128_8), vget_high_s32(samples128_8))); |
4219 | case 8: |
4220 | case 7: prediction128 = vaddq_s64(prediction128, vmull_s32(vget_low_s32(coefficients128_4), vget_low_s32(samples128_4))); |
4221 | case 6: |
4222 | case 5: prediction128 = vaddq_s64(prediction128, vmull_s32(vget_high_s32(coefficients128_4), vget_high_s32(samples128_4))); |
4223 | case 4: |
4224 | case 3: prediction128 = vaddq_s64(prediction128, vmull_s32(vget_low_s32(coefficients128_0), vget_low_s32(samples128_0))); |
4225 | case 2: |
4226 | case 1: prediction128 = vaddq_s64(prediction128, vmull_s32(vget_high_s32(coefficients128_0), vget_high_s32(samples128_0))); |
4227 | } |
4228 | |
4229 | /* Horizontal add and shift. */ |
4230 | prediction64 = drflac__vhaddq_s64(prediction128); |
4231 | prediction64 = vshl_s64(prediction64, shift64); |
4232 | prediction64 = vadd_s64(prediction64, vdup_n_s64(vgetq_lane_u32(riceParamPart128, 0))); |
4233 | |
4234 | /* Our value should be sitting in prediction64[0]. We need to combine this with our SSE samples. */ |
4235 | samples128_8 = drflac__valignrq_s32_1(samples128_4, samples128_8); |
4236 | samples128_4 = drflac__valignrq_s32_1(samples128_0, samples128_4); |
4237 | samples128_0 = drflac__valignrq_s32_1(vcombine_s32(vreinterpret_s32_s64(prediction64), vdup_n_s32(0)), samples128_0); |
4238 | |
4239 | /* Slide our rice parameter down so that the value in position 0 contains the next one to process. */ |
4240 | riceParamPart128 = drflac__valignrq_u32_1(vdupq_n_u32(0), riceParamPart128); |
4241 | } |
4242 | |
4243 | /* We store samples in groups of 4. */ |
4244 | vst1q_s32(pDecodedSamples, samples128_0); |
4245 | pDecodedSamples += 4; |
4246 | } |
4247 | |
4248 | /* Make sure we process the last few samples. */ |
4249 | i = (count & ~3); |
4250 | while (i < (int)count) { |
4251 | /* Rice extraction. */ |
4252 | if (!drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts[0], &riceParamParts[0])) { |
4253 | return DRFLAC_FALSE; |
4254 | } |
4255 | |
4256 | /* Rice reconstruction. */ |
4257 | riceParamParts[0] &= riceParamMask; |
4258 | riceParamParts[0] |= (zeroCountParts[0] << riceParam); |
4259 | riceParamParts[0] = (riceParamParts[0] >> 1) ^ t[riceParamParts[0] & 0x01]; |
4260 | |
4261 | /* Sample reconstruction. */ |
4262 | pDecodedSamples[0] = riceParamParts[0] + drflac__calculate_prediction_64(order, shift, coefficients, pDecodedSamples); |
4263 | |
4264 | i += 1; |
4265 | pDecodedSamples += 1; |
4266 | } |
4267 | |
4268 | return DRFLAC_TRUE; |
4269 | } |
4270 | |
4271 | 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) |
4272 | { |
4273 | DRFLAC_ASSERT(bs != NULL); |
4274 | DRFLAC_ASSERT(count > 0); |
4275 | DRFLAC_ASSERT(pSamplesOut != NULL); |
4276 | |
4277 | /* 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. */ |
4278 | if (order > 0 && order <= 12) { |
4279 | if (bitsPerSample+shift > 32) { |
4280 | return drflac__decode_samples_with_residual__rice__neon_64(bs, count, riceParam, order, shift, coefficients, pSamplesOut); |
4281 | } else { |
4282 | return drflac__decode_samples_with_residual__rice__neon_32(bs, count, riceParam, order, shift, coefficients, pSamplesOut); |
4283 | } |
4284 | } else { |
4285 | return drflac__decode_samples_with_residual__rice__scalar(bs, bitsPerSample, count, riceParam, order, shift, coefficients, pSamplesOut); |
4286 | } |
4287 | } |
4288 | #endif |
4289 | |
4290 | 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) |
4291 | { |
4292 | #if defined(DRFLAC_SUPPORT_SSE41) |
4293 | if (drflac__gIsSSE41Supported) { |
4294 | return drflac__decode_samples_with_residual__rice__sse41(bs, bitsPerSample, count, riceParam, order, shift, coefficients, pSamplesOut); |
4295 | } else |
4296 | #elif defined(DRFLAC_SUPPORT_NEON) |
4297 | if (drflac__gIsNEONSupported) { |
4298 | return drflac__decode_samples_with_residual__rice__neon(bs, bitsPerSample, count, riceParam, order, shift, coefficients, pSamplesOut); |
4299 | } else |
4300 | #endif |
4301 | { |
4302 | /* Scalar fallback. */ |
2ff0b512 |
4303 | return drflac__decode_samples_with_residual__rice__scalar(bs, bitsPerSample, count, riceParam, order, shift, coefficients, pSamplesOut); |
2ff0b512 |
4304 | } |
4305 | } |
4306 | |
4307 | /* 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. */ |
4308 | static drflac_bool32 drflac__read_and_seek_residual__rice(drflac_bs* bs, drflac_uint32 count, drflac_uint8 riceParam) |
4309 | { |
4310 | drflac_uint32 i; |
4311 | |
4312 | DRFLAC_ASSERT(bs != NULL); |
4313 | DRFLAC_ASSERT(count > 0); |
4314 | |
4315 | for (i = 0; i < count; ++i) { |
4316 | if (!drflac__seek_rice_parts(bs, riceParam)) { |
4317 | return DRFLAC_FALSE; |
4318 | } |
4319 | } |
4320 | |
4321 | return DRFLAC_TRUE; |
4322 | } |
4323 | |
4324 | 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) |
4325 | { |
4326 | drflac_uint32 i; |
4327 | |
4328 | DRFLAC_ASSERT(bs != NULL); |
4329 | DRFLAC_ASSERT(count > 0); |
4330 | DRFLAC_ASSERT(unencodedBitsPerSample <= 31); /* <-- unencodedBitsPerSample is a 5 bit number, so cannot exceed 31. */ |
4331 | DRFLAC_ASSERT(pSamplesOut != NULL); |
4332 | |
4333 | for (i = 0; i < count; ++i) { |
4334 | if (unencodedBitsPerSample > 0) { |
4335 | if (!drflac__read_int32(bs, unencodedBitsPerSample, pSamplesOut + i)) { |
4336 | return DRFLAC_FALSE; |
4337 | } |
4338 | } else { |
4339 | pSamplesOut[i] = 0; |
4340 | } |
4341 | |
4342 | if (bitsPerSample >= 24) { |
4343 | pSamplesOut[i] += drflac__calculate_prediction_64(order, shift, coefficients, pSamplesOut + i); |
4344 | } else { |
4345 | pSamplesOut[i] += drflac__calculate_prediction_32(order, shift, coefficients, pSamplesOut + i); |
4346 | } |
4347 | } |
4348 | |
4349 | return DRFLAC_TRUE; |
4350 | } |
4351 | |
4352 | |
4353 | /* |
4354 | Reads and decodes the residual for the sub-frame the decoder is currently sitting on. This function should be called |
4355 | when the decoder is sitting at the very start of the RESIDUAL block. The first <order> residuals will be ignored. The |
4356 | <blockSize> and <order> parameters are used to determine how many residual values need to be decoded. |
4357 | */ |
4358 | 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) |
4359 | { |
4360 | drflac_uint8 residualMethod; |
4361 | drflac_uint8 partitionOrder; |
4362 | drflac_uint32 samplesInPartition; |
4363 | drflac_uint32 partitionsRemaining; |
4364 | |
4365 | DRFLAC_ASSERT(bs != NULL); |
4366 | DRFLAC_ASSERT(blockSize != 0); |
4367 | DRFLAC_ASSERT(pDecodedSamples != NULL); /* <-- Should we allow NULL, in which case we just seek past the residual rather than do a full decode? */ |
4368 | |
4369 | if (!drflac__read_uint8(bs, 2, &residualMethod)) { |
4370 | return DRFLAC_FALSE; |
4371 | } |
4372 | |
4373 | if (residualMethod != DRFLAC_RESIDUAL_CODING_METHOD_PARTITIONED_RICE && residualMethod != DRFLAC_RESIDUAL_CODING_METHOD_PARTITIONED_RICE2) { |
4374 | return DRFLAC_FALSE; /* Unknown or unsupported residual coding method. */ |
4375 | } |
4376 | |
4377 | /* Ignore the first <order> values. */ |
4378 | pDecodedSamples += order; |
4379 | |
4380 | if (!drflac__read_uint8(bs, 4, &partitionOrder)) { |
4381 | return DRFLAC_FALSE; |
4382 | } |
4383 | |
4384 | /* |
4385 | From the FLAC spec: |
4386 | The Rice partition order in a Rice-coded residual section must be less than or equal to 8. |
4387 | */ |
4388 | if (partitionOrder > 8) { |
4389 | return DRFLAC_FALSE; |
4390 | } |
4391 | |
4392 | /* Validation check. */ |
4393 | if ((blockSize / (1 << partitionOrder)) <= order) { |
4394 | return DRFLAC_FALSE; |
4395 | } |
4396 | |
4397 | samplesInPartition = (blockSize / (1 << partitionOrder)) - order; |
4398 | partitionsRemaining = (1 << partitionOrder); |
4399 | for (;;) { |
4400 | drflac_uint8 riceParam = 0; |
4401 | if (residualMethod == DRFLAC_RESIDUAL_CODING_METHOD_PARTITIONED_RICE) { |
4402 | if (!drflac__read_uint8(bs, 4, &riceParam)) { |
4403 | return DRFLAC_FALSE; |
4404 | } |
4405 | if (riceParam == 15) { |
4406 | riceParam = 0xFF; |
4407 | } |
4408 | } else if (residualMethod == DRFLAC_RESIDUAL_CODING_METHOD_PARTITIONED_RICE2) { |
4409 | if (!drflac__read_uint8(bs, 5, &riceParam)) { |
4410 | return DRFLAC_FALSE; |
4411 | } |
4412 | if (riceParam == 31) { |
4413 | riceParam = 0xFF; |
4414 | } |
4415 | } |
4416 | |
4417 | if (riceParam != 0xFF) { |
4418 | if (!drflac__decode_samples_with_residual__rice(bs, bitsPerSample, samplesInPartition, riceParam, order, shift, coefficients, pDecodedSamples)) { |
4419 | return DRFLAC_FALSE; |
4420 | } |
4421 | } else { |
4422 | drflac_uint8 unencodedBitsPerSample = 0; |
4423 | if (!drflac__read_uint8(bs, 5, &unencodedBitsPerSample)) { |
4424 | return DRFLAC_FALSE; |
4425 | } |
4426 | |
4427 | if (!drflac__decode_samples_with_residual__unencoded(bs, bitsPerSample, samplesInPartition, unencodedBitsPerSample, order, shift, coefficients, pDecodedSamples)) { |
4428 | return DRFLAC_FALSE; |
4429 | } |
4430 | } |
4431 | |
4432 | pDecodedSamples += samplesInPartition; |
4433 | |
4434 | if (partitionsRemaining == 1) { |
4435 | break; |
4436 | } |
4437 | |
4438 | partitionsRemaining -= 1; |
4439 | |
4440 | if (partitionOrder != 0) { |
4441 | samplesInPartition = blockSize / (1 << partitionOrder); |
4442 | } |
4443 | } |
4444 | |
4445 | return DRFLAC_TRUE; |
4446 | } |
4447 | |
4448 | /* |
4449 | Reads and seeks past the residual for the sub-frame the decoder is currently sitting on. This function should be called |
4450 | when the decoder is sitting at the very start of the RESIDUAL block. The first <order> residuals will be set to 0. The |
4451 | <blockSize> and <order> parameters are used to determine how many residual values need to be decoded. |
4452 | */ |
4453 | static drflac_bool32 drflac__read_and_seek_residual(drflac_bs* bs, drflac_uint32 blockSize, drflac_uint32 order) |
4454 | { |
4455 | drflac_uint8 residualMethod; |
4456 | drflac_uint8 partitionOrder; |
4457 | drflac_uint32 samplesInPartition; |
4458 | drflac_uint32 partitionsRemaining; |
4459 | |
4460 | DRFLAC_ASSERT(bs != NULL); |
4461 | DRFLAC_ASSERT(blockSize != 0); |
4462 | |
4463 | if (!drflac__read_uint8(bs, 2, &residualMethod)) { |
4464 | return DRFLAC_FALSE; |
4465 | } |
4466 | |
4467 | if (residualMethod != DRFLAC_RESIDUAL_CODING_METHOD_PARTITIONED_RICE && residualMethod != DRFLAC_RESIDUAL_CODING_METHOD_PARTITIONED_RICE2) { |
4468 | return DRFLAC_FALSE; /* Unknown or unsupported residual coding method. */ |
4469 | } |
4470 | |
4471 | if (!drflac__read_uint8(bs, 4, &partitionOrder)) { |
4472 | return DRFLAC_FALSE; |
4473 | } |
4474 | |
4475 | /* |
4476 | From the FLAC spec: |
4477 | The Rice partition order in a Rice-coded residual section must be less than or equal to 8. |
4478 | */ |
4479 | if (partitionOrder > 8) { |
4480 | return DRFLAC_FALSE; |
4481 | } |
4482 | |
4483 | /* Validation check. */ |
4484 | if ((blockSize / (1 << partitionOrder)) <= order) { |
4485 | return DRFLAC_FALSE; |
4486 | } |
4487 | |
4488 | samplesInPartition = (blockSize / (1 << partitionOrder)) - order; |
4489 | partitionsRemaining = (1 << partitionOrder); |
4490 | for (;;) |
4491 | { |
4492 | drflac_uint8 riceParam = 0; |
4493 | if (residualMethod == DRFLAC_RESIDUAL_CODING_METHOD_PARTITIONED_RICE) { |
4494 | if (!drflac__read_uint8(bs, 4, &riceParam)) { |
4495 | return DRFLAC_FALSE; |
4496 | } |
4497 | if (riceParam == 15) { |
4498 | riceParam = 0xFF; |
4499 | } |
4500 | } else if (residualMethod == DRFLAC_RESIDUAL_CODING_METHOD_PARTITIONED_RICE2) { |
4501 | if (!drflac__read_uint8(bs, 5, &riceParam)) { |
4502 | return DRFLAC_FALSE; |
4503 | } |
4504 | if (riceParam == 31) { |
4505 | riceParam = 0xFF; |
4506 | } |
4507 | } |
4508 | |
4509 | if (riceParam != 0xFF) { |
4510 | if (!drflac__read_and_seek_residual__rice(bs, samplesInPartition, riceParam)) { |
4511 | return DRFLAC_FALSE; |
4512 | } |
4513 | } else { |
4514 | drflac_uint8 unencodedBitsPerSample = 0; |
4515 | if (!drflac__read_uint8(bs, 5, &unencodedBitsPerSample)) { |
4516 | return DRFLAC_FALSE; |
4517 | } |
4518 | |
4519 | if (!drflac__seek_bits(bs, unencodedBitsPerSample * samplesInPartition)) { |
4520 | return DRFLAC_FALSE; |
4521 | } |
4522 | } |
4523 | |
4524 | |
4525 | if (partitionsRemaining == 1) { |
4526 | break; |
4527 | } |
4528 | |
4529 | partitionsRemaining -= 1; |
4530 | samplesInPartition = blockSize / (1 << partitionOrder); |
4531 | } |
4532 | |
4533 | return DRFLAC_TRUE; |
4534 | } |
4535 | |
4536 | |
4537 | static drflac_bool32 drflac__decode_samples__constant(drflac_bs* bs, drflac_uint32 blockSize, drflac_uint32 subframeBitsPerSample, drflac_int32* pDecodedSamples) |
4538 | { |
4539 | drflac_uint32 i; |
4540 | |
4541 | /* Only a single sample needs to be decoded here. */ |
4542 | drflac_int32 sample; |
4543 | if (!drflac__read_int32(bs, subframeBitsPerSample, &sample)) { |
4544 | return DRFLAC_FALSE; |
4545 | } |
4546 | |
4547 | /* |
4548 | We don't really need to expand this, but it does simplify the process of reading samples. If this becomes a performance issue (unlikely) |
4549 | we'll want to look at a more efficient way. |
4550 | */ |
4551 | for (i = 0; i < blockSize; ++i) { |
4552 | pDecodedSamples[i] = sample; |
4553 | } |
4554 | |
4555 | return DRFLAC_TRUE; |
4556 | } |
4557 | |
4558 | static drflac_bool32 drflac__decode_samples__verbatim(drflac_bs* bs, drflac_uint32 blockSize, drflac_uint32 subframeBitsPerSample, drflac_int32* pDecodedSamples) |
4559 | { |
4560 | drflac_uint32 i; |
4561 | |
4562 | for (i = 0; i < blockSize; ++i) { |
4563 | drflac_int32 sample; |
4564 | if (!drflac__read_int32(bs, subframeBitsPerSample, &sample)) { |
4565 | return DRFLAC_FALSE; |
4566 | } |
4567 | |
4568 | pDecodedSamples[i] = sample; |
4569 | } |
4570 | |
4571 | return DRFLAC_TRUE; |
4572 | } |
4573 | |
4574 | static drflac_bool32 drflac__decode_samples__fixed(drflac_bs* bs, drflac_uint32 blockSize, drflac_uint32 subframeBitsPerSample, drflac_uint8 lpcOrder, drflac_int32* pDecodedSamples) |
4575 | { |
4576 | drflac_uint32 i; |
4577 | |
4578 | static drflac_int32 lpcCoefficientsTable[5][4] = { |
4579 | {0, 0, 0, 0}, |
4580 | {1, 0, 0, 0}, |
4581 | {2, -1, 0, 0}, |
4582 | {3, -3, 1, 0}, |
4583 | {4, -6, 4, -1} |
4584 | }; |
4585 | |
4586 | /* Warm up samples and coefficients. */ |
4587 | for (i = 0; i < lpcOrder; ++i) { |
4588 | drflac_int32 sample; |
4589 | if (!drflac__read_int32(bs, subframeBitsPerSample, &sample)) { |
4590 | return DRFLAC_FALSE; |
4591 | } |
4592 | |
4593 | pDecodedSamples[i] = sample; |
4594 | } |
4595 | |
4596 | if (!drflac__decode_samples_with_residual(bs, subframeBitsPerSample, blockSize, lpcOrder, 0, lpcCoefficientsTable[lpcOrder], pDecodedSamples)) { |
4597 | return DRFLAC_FALSE; |
4598 | } |
4599 | |
4600 | return DRFLAC_TRUE; |
4601 | } |
4602 | |
4603 | static drflac_bool32 drflac__decode_samples__lpc(drflac_bs* bs, drflac_uint32 blockSize, drflac_uint32 bitsPerSample, drflac_uint8 lpcOrder, drflac_int32* pDecodedSamples) |
4604 | { |
4605 | drflac_uint8 i; |
4606 | drflac_uint8 lpcPrecision; |
4607 | drflac_int8 lpcShift; |
4608 | drflac_int32 coefficients[32]; |
4609 | |
4610 | /* Warm up samples. */ |
4611 | for (i = 0; i < lpcOrder; ++i) { |
4612 | drflac_int32 sample; |
4613 | if (!drflac__read_int32(bs, bitsPerSample, &sample)) { |
4614 | return DRFLAC_FALSE; |
4615 | } |
4616 | |
4617 | pDecodedSamples[i] = sample; |
4618 | } |
4619 | |
4620 | if (!drflac__read_uint8(bs, 4, &lpcPrecision)) { |
4621 | return DRFLAC_FALSE; |
4622 | } |
4623 | if (lpcPrecision == 15) { |
4624 | return DRFLAC_FALSE; /* Invalid. */ |
4625 | } |
4626 | lpcPrecision += 1; |
4627 | |
4628 | if (!drflac__read_int8(bs, 5, &lpcShift)) { |
4629 | return DRFLAC_FALSE; |
4630 | } |
4631 | |
4632 | /* |
4633 | From the FLAC specification: |
4634 | |
4635 | Quantized linear predictor coefficient shift needed in bits (NOTE: this number is signed two's-complement) |
4636 | |
4637 | 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 |
4638 | 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. |
4639 | */ |
4640 | if (lpcShift < 0) { |
4641 | return DRFLAC_FALSE; |
4642 | } |
4643 | |
4644 | DRFLAC_ZERO_MEMORY(coefficients, sizeof(coefficients)); |
4645 | for (i = 0; i < lpcOrder; ++i) { |
4646 | if (!drflac__read_int32(bs, lpcPrecision, coefficients + i)) { |
4647 | return DRFLAC_FALSE; |
4648 | } |
4649 | } |
4650 | |
4651 | if (!drflac__decode_samples_with_residual(bs, bitsPerSample, blockSize, lpcOrder, lpcShift, coefficients, pDecodedSamples)) { |
4652 | return DRFLAC_FALSE; |
4653 | } |
4654 | |
4655 | return DRFLAC_TRUE; |
4656 | } |
4657 | |
4658 | |
4659 | static drflac_bool32 drflac__read_next_flac_frame_header(drflac_bs* bs, drflac_uint8 streaminfoBitsPerSample, drflac_frame_header* header) |
4660 | { |
4661 | const drflac_uint32 sampleRateTable[12] = {0, 88200, 176400, 192000, 8000, 16000, 22050, 24000, 32000, 44100, 48000, 96000}; |
4662 | const drflac_uint8 bitsPerSampleTable[8] = {0, 8, 12, (drflac_uint8)-1, 16, 20, 24, (drflac_uint8)-1}; /* -1 = reserved. */ |
4663 | |
4664 | DRFLAC_ASSERT(bs != NULL); |
4665 | DRFLAC_ASSERT(header != NULL); |
4666 | |
4667 | /* Keep looping until we find a valid sync code. */ |
4668 | for (;;) { |
4669 | drflac_uint8 crc8 = 0xCE; /* 0xCE = drflac_crc8(0, 0x3FFE, 14); */ |
4670 | drflac_uint8 reserved = 0; |
4671 | drflac_uint8 blockingStrategy = 0; |
4672 | drflac_uint8 blockSize = 0; |
4673 | drflac_uint8 sampleRate = 0; |
4674 | drflac_uint8 channelAssignment = 0; |
4675 | drflac_uint8 bitsPerSample = 0; |
4676 | drflac_bool32 isVariableBlockSize; |
4677 | |
4678 | if (!drflac__find_and_seek_to_next_sync_code(bs)) { |
4679 | return DRFLAC_FALSE; |
4680 | } |
4681 | |
4682 | if (!drflac__read_uint8(bs, 1, &reserved)) { |
4683 | return DRFLAC_FALSE; |
4684 | } |
4685 | if (reserved == 1) { |
4686 | continue; |
4687 | } |
4688 | crc8 = drflac_crc8(crc8, reserved, 1); |
4689 | |
4690 | if (!drflac__read_uint8(bs, 1, &blockingStrategy)) { |
4691 | return DRFLAC_FALSE; |
4692 | } |
4693 | crc8 = drflac_crc8(crc8, blockingStrategy, 1); |
4694 | |
4695 | if (!drflac__read_uint8(bs, 4, &blockSize)) { |
4696 | return DRFLAC_FALSE; |
4697 | } |
4698 | if (blockSize == 0) { |
4699 | continue; |
4700 | } |
4701 | crc8 = drflac_crc8(crc8, blockSize, 4); |
4702 | |
4703 | if (!drflac__read_uint8(bs, 4, &sampleRate)) { |
4704 | return DRFLAC_FALSE; |
4705 | } |
4706 | crc8 = drflac_crc8(crc8, sampleRate, 4); |
4707 | |
4708 | if (!drflac__read_uint8(bs, 4, &channelAssignment)) { |
4709 | return DRFLAC_FALSE; |
4710 | } |
4711 | if (channelAssignment > 10) { |
4712 | continue; |
4713 | } |
4714 | crc8 = drflac_crc8(crc8, channelAssignment, 4); |
4715 | |
4716 | if (!drflac__read_uint8(bs, 3, &bitsPerSample)) { |
4717 | return DRFLAC_FALSE; |
4718 | } |
4719 | if (bitsPerSample == 3 || bitsPerSample == 7) { |
4720 | continue; |
4721 | } |
4722 | crc8 = drflac_crc8(crc8, bitsPerSample, 3); |
4723 | |
4724 | |
4725 | if (!drflac__read_uint8(bs, 1, &reserved)) { |
4726 | return DRFLAC_FALSE; |
4727 | } |
4728 | if (reserved == 1) { |
4729 | continue; |
4730 | } |
4731 | crc8 = drflac_crc8(crc8, reserved, 1); |
4732 | |
4733 | |
4734 | isVariableBlockSize = blockingStrategy == 1; |
4735 | if (isVariableBlockSize) { |
4736 | drflac_uint64 pcmFrameNumber; |
4737 | drflac_result result = drflac__read_utf8_coded_number(bs, &pcmFrameNumber, &crc8); |
4738 | if (result != DRFLAC_SUCCESS) { |
4739 | if (result == DRFLAC_AT_END) { |
4740 | return DRFLAC_FALSE; |
4741 | } else { |
4742 | continue; |
4743 | } |
4744 | } |
4745 | header->flacFrameNumber = 0; |
4746 | header->pcmFrameNumber = pcmFrameNumber; |
4747 | } else { |
4748 | drflac_uint64 flacFrameNumber = 0; |
4749 | drflac_result result = drflac__read_utf8_coded_number(bs, &flacFrameNumber, &crc8); |
4750 | if (result != DRFLAC_SUCCESS) { |
4751 | if (result == DRFLAC_AT_END) { |
4752 | return DRFLAC_FALSE; |
4753 | } else { |
4754 | continue; |
4755 | } |
4756 | } |
4757 | header->flacFrameNumber = (drflac_uint32)flacFrameNumber; /* <-- Safe cast. */ |
4758 | header->pcmFrameNumber = 0; |
4759 | } |
4760 | |
4761 | |
4762 | DRFLAC_ASSERT(blockSize > 0); |
4763 | if (blockSize == 1) { |
4764 | header->blockSizeInPCMFrames = 192; |
4765 | } else if (blockSize <= 5) { |
4766 | DRFLAC_ASSERT(blockSize >= 2); |
4767 | header->blockSizeInPCMFrames = 576 * (1 << (blockSize - 2)); |
4768 | } else if (blockSize == 6) { |
4769 | if (!drflac__read_uint16(bs, 8, &header->blockSizeInPCMFrames)) { |
4770 | return DRFLAC_FALSE; |
4771 | } |
4772 | crc8 = drflac_crc8(crc8, header->blockSizeInPCMFrames, 8); |
4773 | header->blockSizeInPCMFrames += 1; |
4774 | } else if (blockSize == 7) { |
4775 | if (!drflac__read_uint16(bs, 16, &header->blockSizeInPCMFrames)) { |
4776 | return DRFLAC_FALSE; |
4777 | } |
4778 | crc8 = drflac_crc8(crc8, header->blockSizeInPCMFrames, 16); |
4779 | header->blockSizeInPCMFrames += 1; |
4780 | } else { |
4781 | DRFLAC_ASSERT(blockSize >= 8); |
4782 | header->blockSizeInPCMFrames = 256 * (1 << (blockSize - 8)); |
4783 | } |
4784 | |
4785 | |
4786 | if (sampleRate <= 11) { |
4787 | header->sampleRate = sampleRateTable[sampleRate]; |
4788 | } else if (sampleRate == 12) { |
4789 | if (!drflac__read_uint32(bs, 8, &header->sampleRate)) { |
4790 | return DRFLAC_FALSE; |
4791 | } |
4792 | crc8 = drflac_crc8(crc8, header->sampleRate, 8); |
4793 | header->sampleRate *= 1000; |
4794 | } else if (sampleRate == 13) { |
4795 | if (!drflac__read_uint32(bs, 16, &header->sampleRate)) { |
4796 | return DRFLAC_FALSE; |
4797 | } |
4798 | crc8 = drflac_crc8(crc8, header->sampleRate, 16); |
4799 | } else if (sampleRate == 14) { |
4800 | if (!drflac__read_uint32(bs, 16, &header->sampleRate)) { |
4801 | return DRFLAC_FALSE; |
4802 | } |
4803 | crc8 = drflac_crc8(crc8, header->sampleRate, 16); |
4804 | header->sampleRate *= 10; |
4805 | } else { |
4806 | continue; /* Invalid. Assume an invalid block. */ |
4807 | } |
4808 | |
4809 | |
4810 | header->channelAssignment = channelAssignment; |
4811 | |
4812 | header->bitsPerSample = bitsPerSampleTable[bitsPerSample]; |
4813 | if (header->bitsPerSample == 0) { |
4814 | header->bitsPerSample = streaminfoBitsPerSample; |
4815 | } |
4816 | |
4817 | if (!drflac__read_uint8(bs, 8, &header->crc8)) { |
4818 | return DRFLAC_FALSE; |
4819 | } |
4820 | |
4821 | #ifndef DR_FLAC_NO_CRC |
4822 | if (header->crc8 != crc8) { |
4823 | continue; /* CRC mismatch. Loop back to the top and find the next sync code. */ |
4824 | } |
4825 | #endif |
4826 | return DRFLAC_TRUE; |
4827 | } |
4828 | } |
4829 | |
4830 | static drflac_bool32 drflac__read_subframe_header(drflac_bs* bs, drflac_subframe* pSubframe) |
4831 | { |
4832 | drflac_uint8 header; |
4833 | int type; |
4834 | |
4835 | if (!drflac__read_uint8(bs, 8, &header)) { |
4836 | return DRFLAC_FALSE; |
4837 | } |
4838 | |
4839 | /* First bit should always be 0. */ |
4840 | if ((header & 0x80) != 0) { |
4841 | return DRFLAC_FALSE; |
4842 | } |
4843 | |
4844 | type = (header & 0x7E) >> 1; |
4845 | if (type == 0) { |
4846 | pSubframe->subframeType = DRFLAC_SUBFRAME_CONSTANT; |
4847 | } else if (type == 1) { |
4848 | pSubframe->subframeType = DRFLAC_SUBFRAME_VERBATIM; |
4849 | } else { |
4850 | if ((type & 0x20) != 0) { |
4851 | pSubframe->subframeType = DRFLAC_SUBFRAME_LPC; |
4852 | pSubframe->lpcOrder = (drflac_uint8)(type & 0x1F) + 1; |
4853 | } else if ((type & 0x08) != 0) { |
4854 | pSubframe->subframeType = DRFLAC_SUBFRAME_FIXED; |
4855 | pSubframe->lpcOrder = (drflac_uint8)(type & 0x07); |
4856 | if (pSubframe->lpcOrder > 4) { |
4857 | pSubframe->subframeType = DRFLAC_SUBFRAME_RESERVED; |
4858 | pSubframe->lpcOrder = 0; |
4859 | } |
4860 | } else { |
4861 | pSubframe->subframeType = DRFLAC_SUBFRAME_RESERVED; |
4862 | } |
4863 | } |
4864 | |
4865 | if (pSubframe->subframeType == DRFLAC_SUBFRAME_RESERVED) { |
4866 | return DRFLAC_FALSE; |
4867 | } |
4868 | |
4869 | /* Wasted bits per sample. */ |
4870 | pSubframe->wastedBitsPerSample = 0; |
4871 | if ((header & 0x01) == 1) { |
4872 | unsigned int wastedBitsPerSample; |
4873 | if (!drflac__seek_past_next_set_bit(bs, &wastedBitsPerSample)) { |
4874 | return DRFLAC_FALSE; |
4875 | } |
4876 | pSubframe->wastedBitsPerSample = (drflac_uint8)wastedBitsPerSample + 1; |
4877 | } |
4878 | |
4879 | return DRFLAC_TRUE; |
4880 | } |
4881 | |
4882 | static drflac_bool32 drflac__decode_subframe(drflac_bs* bs, drflac_frame* frame, int subframeIndex, drflac_int32* pDecodedSamplesOut) |
4883 | { |
4884 | drflac_subframe* pSubframe; |
4885 | drflac_uint32 subframeBitsPerSample; |
4886 | |
4887 | DRFLAC_ASSERT(bs != NULL); |
4888 | DRFLAC_ASSERT(frame != NULL); |
4889 | |
4890 | pSubframe = frame->subframes + subframeIndex; |
4891 | if (!drflac__read_subframe_header(bs, pSubframe)) { |
4892 | return DRFLAC_FALSE; |
4893 | } |
4894 | |
4895 | /* Side channels require an extra bit per sample. Took a while to figure that one out... */ |
4896 | subframeBitsPerSample = frame->header.bitsPerSample; |
4897 | if ((frame->header.channelAssignment == DRFLAC_CHANNEL_ASSIGNMENT_LEFT_SIDE || frame->header.channelAssignment == DRFLAC_CHANNEL_ASSIGNMENT_MID_SIDE) && subframeIndex == 1) { |
4898 | subframeBitsPerSample += 1; |
4899 | } else if (frame->header.channelAssignment == DRFLAC_CHANNEL_ASSIGNMENT_RIGHT_SIDE && subframeIndex == 0) { |
4900 | subframeBitsPerSample += 1; |
4901 | } |
4902 | |
4903 | /* Need to handle wasted bits per sample. */ |
4904 | if (pSubframe->wastedBitsPerSample >= subframeBitsPerSample) { |
4905 | return DRFLAC_FALSE; |
4906 | } |
4907 | subframeBitsPerSample -= pSubframe->wastedBitsPerSample; |
4908 | |
4909 | pSubframe->pSamplesS32 = pDecodedSamplesOut; |
4910 | |
4911 | switch (pSubframe->subframeType) |
4912 | { |
4913 | case DRFLAC_SUBFRAME_CONSTANT: |
4914 | { |
4915 | drflac__decode_samples__constant(bs, frame->header.blockSizeInPCMFrames, subframeBitsPerSample, pSubframe->pSamplesS32); |
4916 | } break; |
4917 | |
4918 | case DRFLAC_SUBFRAME_VERBATIM: |
4919 | { |
4920 | drflac__decode_samples__verbatim(bs, frame->header.blockSizeInPCMFrames, subframeBitsPerSample, pSubframe->pSamplesS32); |
4921 | } break; |
4922 | |
4923 | case DRFLAC_SUBFRAME_FIXED: |
4924 | { |
4925 | drflac__decode_samples__fixed(bs, frame->header.blockSizeInPCMFrames, subframeBitsPerSample, pSubframe->lpcOrder, pSubframe->pSamplesS32); |
4926 | } break; |
4927 | |
4928 | case DRFLAC_SUBFRAME_LPC: |
4929 | { |
4930 | drflac__decode_samples__lpc(bs, frame->header.blockSizeInPCMFrames, subframeBitsPerSample, pSubframe->lpcOrder, pSubframe->pSamplesS32); |
4931 | } break; |
4932 | |
4933 | default: return DRFLAC_FALSE; |
4934 | } |
4935 | |
4936 | return DRFLAC_TRUE; |
4937 | } |
4938 | |
4939 | static drflac_bool32 drflac__seek_subframe(drflac_bs* bs, drflac_frame* frame, int subframeIndex) |
4940 | { |
4941 | drflac_subframe* pSubframe; |
4942 | drflac_uint32 subframeBitsPerSample; |
4943 | |
4944 | DRFLAC_ASSERT(bs != NULL); |
4945 | DRFLAC_ASSERT(frame != NULL); |
4946 | |
4947 | pSubframe = frame->subframes + subframeIndex; |
4948 | if (!drflac__read_subframe_header(bs, pSubframe)) { |
4949 | return DRFLAC_FALSE; |
4950 | } |
4951 | |
4952 | /* Side channels require an extra bit per sample. Took a while to figure that one out... */ |
4953 | subframeBitsPerSample = frame->header.bitsPerSample; |
4954 | if ((frame->header.channelAssignment == DRFLAC_CHANNEL_ASSIGNMENT_LEFT_SIDE || frame->header.channelAssignment == DRFLAC_CHANNEL_ASSIGNMENT_MID_SIDE) && subframeIndex == 1) { |
4955 | subframeBitsPerSample += 1; |
4956 | } else if (frame->header.channelAssignment == DRFLAC_CHANNEL_ASSIGNMENT_RIGHT_SIDE && subframeIndex == 0) { |
4957 | subframeBitsPerSample += 1; |
4958 | } |
4959 | |
4960 | /* Need to handle wasted bits per sample. */ |
4961 | if (pSubframe->wastedBitsPerSample >= subframeBitsPerSample) { |
4962 | return DRFLAC_FALSE; |
4963 | } |
4964 | subframeBitsPerSample -= pSubframe->wastedBitsPerSample; |
4965 | |
4966 | pSubframe->pSamplesS32 = NULL; |
4967 | |
4968 | switch (pSubframe->subframeType) |
4969 | { |
4970 | case DRFLAC_SUBFRAME_CONSTANT: |
4971 | { |
4972 | if (!drflac__seek_bits(bs, subframeBitsPerSample)) { |
4973 | return DRFLAC_FALSE; |
4974 | } |
4975 | } break; |
4976 | |
4977 | case DRFLAC_SUBFRAME_VERBATIM: |
4978 | { |
4979 | unsigned int bitsToSeek = frame->header.blockSizeInPCMFrames * subframeBitsPerSample; |
4980 | if (!drflac__seek_bits(bs, bitsToSeek)) { |
4981 | return DRFLAC_FALSE; |
4982 | } |
4983 | } break; |
4984 | |
4985 | case DRFLAC_SUBFRAME_FIXED: |
4986 | { |
4987 | unsigned int bitsToSeek = pSubframe->lpcOrder * subframeBitsPerSample; |
4988 | if (!drflac__seek_bits(bs, bitsToSeek)) { |
4989 | return DRFLAC_FALSE; |
4990 | } |
4991 | |
4992 | if (!drflac__read_and_seek_residual(bs, frame->header.blockSizeInPCMFrames, pSubframe->lpcOrder)) { |
4993 | return DRFLAC_FALSE; |
4994 | } |
4995 | } break; |
4996 | |
4997 | case DRFLAC_SUBFRAME_LPC: |
4998 | { |
4999 | drflac_uint8 lpcPrecision; |
5000 | |
5001 | unsigned int bitsToSeek = pSubframe->lpcOrder * subframeBitsPerSample; |
5002 | if (!drflac__seek_bits(bs, bitsToSeek)) { |
5003 | return DRFLAC_FALSE; |
5004 | } |
5005 | |
5006 | if (!drflac__read_uint8(bs, 4, &lpcPrecision)) { |
5007 | return DRFLAC_FALSE; |
5008 | } |
5009 | if (lpcPrecision == 15) { |
5010 | return DRFLAC_FALSE; /* Invalid. */ |
5011 | } |
5012 | lpcPrecision += 1; |
5013 | |
5014 | |
5015 | bitsToSeek = (pSubframe->lpcOrder * lpcPrecision) + 5; /* +5 for shift. */ |
5016 | if (!drflac__seek_bits(bs, bitsToSeek)) { |
5017 | return DRFLAC_FALSE; |
5018 | } |
5019 | |
5020 | if (!drflac__read_and_seek_residual(bs, frame->header.blockSizeInPCMFrames, pSubframe->lpcOrder)) { |
5021 | return DRFLAC_FALSE; |
5022 | } |
5023 | } break; |
5024 | |
5025 | default: return DRFLAC_FALSE; |
5026 | } |
5027 | |
5028 | return DRFLAC_TRUE; |
5029 | } |
5030 | |
5031 | |
5032 | static DRFLAC_INLINE drflac_uint8 drflac__get_channel_count_from_channel_assignment(drflac_int8 channelAssignment) |
5033 | { |
5034 | drflac_uint8 lookup[] = {1, 2, 3, 4, 5, 6, 7, 8, 2, 2, 2}; |
5035 | |
5036 | DRFLAC_ASSERT(channelAssignment <= 10); |
5037 | return lookup[channelAssignment]; |
5038 | } |
5039 | |
5040 | static drflac_result drflac__decode_flac_frame(drflac* pFlac) |
5041 | { |
5042 | int channelCount; |
5043 | int i; |
5044 | drflac_uint8 paddingSizeInBits; |
5045 | drflac_uint16 desiredCRC16; |
5046 | #ifndef DR_FLAC_NO_CRC |
5047 | drflac_uint16 actualCRC16; |
5048 | #endif |
5049 | |
5050 | /* This function should be called while the stream is sitting on the first byte after the frame header. */ |
5051 | DRFLAC_ZERO_MEMORY(pFlac->currentFLACFrame.subframes, sizeof(pFlac->currentFLACFrame.subframes)); |
5052 | |
5053 | /* The frame block size must never be larger than the maximum block size defined by the FLAC stream. */ |
5054 | if (pFlac->currentFLACFrame.header.blockSizeInPCMFrames > pFlac->maxBlockSizeInPCMFrames) { |
5055 | return DRFLAC_ERROR; |
5056 | } |
5057 | |
5058 | /* The number of channels in the frame must match the channel count from the STREAMINFO block. */ |
5059 | channelCount = drflac__get_channel_count_from_channel_assignment(pFlac->currentFLACFrame.header.channelAssignment); |
5060 | if (channelCount != (int)pFlac->channels) { |
5061 | return DRFLAC_ERROR; |
5062 | } |
5063 | |
5064 | for (i = 0; i < channelCount; ++i) { |
5065 | if (!drflac__decode_subframe(&pFlac->bs, &pFlac->currentFLACFrame, i, pFlac->pDecodedSamples + (pFlac->currentFLACFrame.header.blockSizeInPCMFrames * i))) { |
5066 | return DRFLAC_ERROR; |
5067 | } |
5068 | } |
5069 | |
5070 | paddingSizeInBits = (drflac_uint8)(DRFLAC_CACHE_L1_BITS_REMAINING(&pFlac->bs) & 7); |
5071 | if (paddingSizeInBits > 0) { |
5072 | drflac_uint8 padding = 0; |
5073 | if (!drflac__read_uint8(&pFlac->bs, paddingSizeInBits, &padding)) { |
5074 | return DRFLAC_AT_END; |
5075 | } |
5076 | } |
5077 | |
5078 | #ifndef DR_FLAC_NO_CRC |
5079 | actualCRC16 = drflac__flush_crc16(&pFlac->bs); |
5080 | #endif |
5081 | if (!drflac__read_uint16(&pFlac->bs, 16, &desiredCRC16)) { |
5082 | return DRFLAC_AT_END; |
5083 | } |
5084 | |
5085 | #ifndef DR_FLAC_NO_CRC |
5086 | if (actualCRC16 != desiredCRC16) { |
5087 | return DRFLAC_CRC_MISMATCH; /* CRC mismatch. */ |
5088 | } |
5089 | #endif |
5090 | |
5091 | pFlac->currentFLACFrame.pcmFramesRemaining = pFlac->currentFLACFrame.header.blockSizeInPCMFrames; |
5092 | |
5093 | return DRFLAC_SUCCESS; |
5094 | } |
5095 | |
5096 | static drflac_result drflac__seek_flac_frame(drflac* pFlac) |
5097 | { |
5098 | int channelCount; |
5099 | int i; |
5100 | drflac_uint16 desiredCRC16; |
5101 | #ifndef DR_FLAC_NO_CRC |
5102 | drflac_uint16 actualCRC16; |
5103 | #endif |
5104 | |
5105 | channelCount = drflac__get_channel_count_from_channel_assignment(pFlac->currentFLACFrame.header.channelAssignment); |
5106 | for (i = 0; i < channelCount; ++i) { |
5107 | if (!drflac__seek_subframe(&pFlac->bs, &pFlac->currentFLACFrame, i)) { |
5108 | return DRFLAC_ERROR; |
5109 | } |
5110 | } |
5111 | |
5112 | /* Padding. */ |
5113 | if (!drflac__seek_bits(&pFlac->bs, DRFLAC_CACHE_L1_BITS_REMAINING(&pFlac->bs) & 7)) { |
5114 | return DRFLAC_ERROR; |
5115 | } |
5116 | |
5117 | /* CRC. */ |
5118 | #ifndef DR_FLAC_NO_CRC |
5119 | actualCRC16 = drflac__flush_crc16(&pFlac->bs); |
5120 | #endif |
5121 | if (!drflac__read_uint16(&pFlac->bs, 16, &desiredCRC16)) { |
5122 | return DRFLAC_AT_END; |
5123 | } |
5124 | |
5125 | #ifndef DR_FLAC_NO_CRC |
5126 | if (actualCRC16 != desiredCRC16) { |
5127 | return DRFLAC_CRC_MISMATCH; /* CRC mismatch. */ |
5128 | } |
5129 | #endif |
5130 | |
5131 | return DRFLAC_SUCCESS; |
5132 | } |
5133 | |
5134 | static drflac_bool32 drflac__read_and_decode_next_flac_frame(drflac* pFlac) |
5135 | { |
5136 | DRFLAC_ASSERT(pFlac != NULL); |
5137 | |
5138 | for (;;) { |
5139 | drflac_result result; |
5140 | |
5141 | if (!drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFLACFrame.header)) { |
5142 | return DRFLAC_FALSE; |
5143 | } |
5144 | |
5145 | result = drflac__decode_flac_frame(pFlac); |
5146 | if (result != DRFLAC_SUCCESS) { |
5147 | if (result == DRFLAC_CRC_MISMATCH) { |
5148 | continue; /* CRC mismatch. Skip to the next frame. */ |
5149 | } else { |
5150 | return DRFLAC_FALSE; |
5151 | } |
5152 | } |
5153 | |
5154 | return DRFLAC_TRUE; |
5155 | } |
5156 | } |
5157 | |
5158 | static void drflac__get_pcm_frame_range_of_current_flac_frame(drflac* pFlac, drflac_uint64* pFirstPCMFrame, drflac_uint64* pLastPCMFrame) |
5159 | { |
5160 | drflac_uint64 firstPCMFrame; |
5161 | drflac_uint64 lastPCMFrame; |
5162 | |
5163 | DRFLAC_ASSERT(pFlac != NULL); |
5164 | |
5165 | firstPCMFrame = pFlac->currentFLACFrame.header.pcmFrameNumber; |
5166 | if (firstPCMFrame == 0) { |
5167 | firstPCMFrame = ((drflac_uint64)pFlac->currentFLACFrame.header.flacFrameNumber) * pFlac->maxBlockSizeInPCMFrames; |
5168 | } |
5169 | |
5170 | lastPCMFrame = firstPCMFrame + pFlac->currentFLACFrame.header.blockSizeInPCMFrames; |
5171 | if (lastPCMFrame > 0) { |
5172 | lastPCMFrame -= 1; /* Needs to be zero based. */ |
5173 | } |
5174 | |
5175 | if (pFirstPCMFrame) { |
5176 | *pFirstPCMFrame = firstPCMFrame; |
5177 | } |
5178 | if (pLastPCMFrame) { |
5179 | *pLastPCMFrame = lastPCMFrame; |
5180 | } |
5181 | } |
5182 | |
5183 | static drflac_bool32 drflac__seek_to_first_frame(drflac* pFlac) |
5184 | { |
5185 | drflac_bool32 result; |
5186 | |
5187 | DRFLAC_ASSERT(pFlac != NULL); |
5188 | |
5189 | result = drflac__seek_to_byte(&pFlac->bs, pFlac->firstFLACFramePosInBytes); |
5190 | |
5191 | DRFLAC_ZERO_MEMORY(&pFlac->currentFLACFrame, sizeof(pFlac->currentFLACFrame)); |
5192 | pFlac->currentPCMFrame = 0; |
5193 | |
5194 | return result; |
5195 | } |
5196 | |
5197 | static DRFLAC_INLINE drflac_result drflac__seek_to_next_flac_frame(drflac* pFlac) |
5198 | { |
5199 | /* This function should only ever be called while the decoder is sitting on the first byte past the FRAME_HEADER section. */ |
5200 | DRFLAC_ASSERT(pFlac != NULL); |
5201 | return drflac__seek_flac_frame(pFlac); |
5202 | } |
5203 | |
5204 | |
5205 | static drflac_uint64 drflac__seek_forward_by_pcm_frames(drflac* pFlac, drflac_uint64 pcmFramesToSeek) |
5206 | { |
5207 | drflac_uint64 pcmFramesRead = 0; |
5208 | while (pcmFramesToSeek > 0) { |
5209 | if (pFlac->currentFLACFrame.pcmFramesRemaining == 0) { |
5210 | if (!drflac__read_and_decode_next_flac_frame(pFlac)) { |
5211 | break; /* Couldn't read the next frame, so just break from the loop and return. */ |
5212 | } |
5213 | } else { |
5214 | if (pFlac->currentFLACFrame.pcmFramesRemaining > pcmFramesToSeek) { |
5215 | pcmFramesRead += pcmFramesToSeek; |
5216 | pFlac->currentFLACFrame.pcmFramesRemaining -= (drflac_uint32)pcmFramesToSeek; /* <-- Safe cast. Will always be < currentFrame.pcmFramesRemaining < 65536. */ |
5217 | pcmFramesToSeek = 0; |
5218 | } else { |
5219 | pcmFramesRead += pFlac->currentFLACFrame.pcmFramesRemaining; |
5220 | pcmFramesToSeek -= pFlac->currentFLACFrame.pcmFramesRemaining; |
5221 | pFlac->currentFLACFrame.pcmFramesRemaining = 0; |
5222 | } |
5223 | } |
5224 | } |
5225 | |
5226 | pFlac->currentPCMFrame += pcmFramesRead; |
5227 | return pcmFramesRead; |
5228 | } |
5229 | |
5230 | |
5231 | static drflac_bool32 drflac__seek_to_pcm_frame__brute_force(drflac* pFlac, drflac_uint64 pcmFrameIndex) |
5232 | { |
5233 | drflac_bool32 isMidFrame = DRFLAC_FALSE; |
5234 | drflac_uint64 runningPCMFrameCount; |
5235 | |
5236 | DRFLAC_ASSERT(pFlac != NULL); |
5237 | |
5238 | /* 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. */ |
5239 | if (pcmFrameIndex >= pFlac->currentPCMFrame) { |
5240 | /* Seeking forward. Need to seek from the current position. */ |
5241 | runningPCMFrameCount = pFlac->currentPCMFrame; |
5242 | |
5243 | /* The frame header for the first frame may not yet have been read. We need to do that if necessary. */ |
5244 | if (pFlac->currentPCMFrame == 0 && pFlac->currentFLACFrame.pcmFramesRemaining == 0) { |
5245 | if (!drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFLACFrame.header)) { |
5246 | return DRFLAC_FALSE; |
5247 | } |
5248 | } else { |
5249 | isMidFrame = DRFLAC_TRUE; |
5250 | } |
5251 | } else { |
5252 | /* Seeking backwards. Need to seek from the start of the file. */ |
5253 | runningPCMFrameCount = 0; |
5254 | |
5255 | /* Move back to the start. */ |
5256 | if (!drflac__seek_to_first_frame(pFlac)) { |
5257 | return DRFLAC_FALSE; |
5258 | } |
5259 | |
5260 | /* Decode the first frame in preparation for sample-exact seeking below. */ |
5261 | if (!drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFLACFrame.header)) { |
5262 | return DRFLAC_FALSE; |
5263 | } |
5264 | } |
5265 | |
5266 | /* |
5267 | 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 |
5268 | header. If based on the header we can determine that the frame contains the sample, we do a full decode of that frame. |
5269 | */ |
5270 | for (;;) { |
5271 | drflac_uint64 pcmFrameCountInThisFLACFrame; |
5272 | drflac_uint64 firstPCMFrameInFLACFrame = 0; |
5273 | drflac_uint64 lastPCMFrameInFLACFrame = 0; |
5274 | |
5275 | drflac__get_pcm_frame_range_of_current_flac_frame(pFlac, &firstPCMFrameInFLACFrame, &lastPCMFrameInFLACFrame); |
5276 | |
5277 | pcmFrameCountInThisFLACFrame = (lastPCMFrameInFLACFrame - firstPCMFrameInFLACFrame) + 1; |
5278 | if (pcmFrameIndex < (runningPCMFrameCount + pcmFrameCountInThisFLACFrame)) { |
5279 | /* |
5280 | 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 |
5281 | it never existed and keep iterating. |
5282 | */ |
5283 | drflac_uint64 pcmFramesToDecode = pcmFrameIndex - runningPCMFrameCount; |
5284 | |
5285 | if (!isMidFrame) { |
5286 | drflac_result result = drflac__decode_flac_frame(pFlac); |
5287 | if (result == DRFLAC_SUCCESS) { |
5288 | /* The frame is valid. We just need to skip over some samples to ensure it's sample-exact. */ |
5289 | return drflac__seek_forward_by_pcm_frames(pFlac, pcmFramesToDecode) == pcmFramesToDecode; /* <-- If this fails, something bad has happened (it should never fail). */ |
5290 | } else { |
5291 | if (result == DRFLAC_CRC_MISMATCH) { |
5292 | goto next_iteration; /* CRC mismatch. Pretend this frame never existed. */ |
5293 | } else { |
5294 | return DRFLAC_FALSE; |
5295 | } |
5296 | } |
5297 | } else { |
5298 | /* We started seeking mid-frame which means we need to skip the frame decoding part. */ |
5299 | return drflac__seek_forward_by_pcm_frames(pFlac, pcmFramesToDecode) == pcmFramesToDecode; |
5300 | } |
5301 | } else { |
5302 | /* |
5303 | 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 |
5304 | frame never existed and leave the running sample count untouched. |
5305 | */ |
5306 | if (!isMidFrame) { |
5307 | drflac_result result = drflac__seek_to_next_flac_frame(pFlac); |
5308 | if (result == DRFLAC_SUCCESS) { |
5309 | runningPCMFrameCount += pcmFrameCountInThisFLACFrame; |
5310 | } else { |
5311 | if (result == DRFLAC_CRC_MISMATCH) { |
5312 | goto next_iteration; /* CRC mismatch. Pretend this frame never existed. */ |
5313 | } else { |
5314 | return DRFLAC_FALSE; |
5315 | } |
5316 | } |
5317 | } else { |
5318 | /* |
5319 | We started seeking mid-frame which means we need to seek by reading to the end of the frame instead of with |
5320 | drflac__seek_to_next_flac_frame() which only works if the decoder is sitting on the byte just after the frame header. |
5321 | */ |
5322 | runningPCMFrameCount += pFlac->currentFLACFrame.pcmFramesRemaining; |
5323 | pFlac->currentFLACFrame.pcmFramesRemaining = 0; |
5324 | isMidFrame = DRFLAC_FALSE; |
5325 | } |
5326 | |
5327 | /* If we are seeking to the end of the file and we've just hit it, we're done. */ |
5328 | if (pcmFrameIndex == pFlac->totalPCMFrameCount && runningPCMFrameCount == pFlac->totalPCMFrameCount) { |
5329 | return DRFLAC_TRUE; |
5330 | } |
5331 | } |
5332 | |
5333 | next_iteration: |
5334 | /* Grab the next frame in preparation for the next iteration. */ |
5335 | if (!drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFLACFrame.header)) { |
5336 | return DRFLAC_FALSE; |
5337 | } |
5338 | } |
5339 | } |
5340 | |
5341 | |
5342 | #if !defined(DR_FLAC_NO_CRC) |
5343 | /* |
5344 | We use an average compression ratio to determine our approximate start location. FLAC files are generally about 50%-70% the size of their |
5345 | 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 |
5346 | location. |
5347 | */ |
5348 | #define DRFLAC_BINARY_SEARCH_APPROX_COMPRESSION_RATIO 0.6f |
5349 | |
5350 | 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) |
5351 | { |
5352 | DRFLAC_ASSERT(pFlac != NULL); |
5353 | DRFLAC_ASSERT(pLastSuccessfulSeekOffset != NULL); |
5354 | DRFLAC_ASSERT(targetByte >= rangeLo); |
5355 | DRFLAC_ASSERT(targetByte <= rangeHi); |
5356 | |
5357 | *pLastSuccessfulSeekOffset = pFlac->firstFLACFramePosInBytes; |
5358 | |
5359 | for (;;) { |
5360 | /* After rangeLo == rangeHi == targetByte fails, we need to break out. */ |
5361 | drflac_uint64 lastTargetByte = targetByte; |
5362 | |
5363 | /* 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. */ |
5364 | if (!drflac__seek_to_byte(&pFlac->bs, targetByte)) { |
5365 | /* If we couldn't even seek to the first byte in the stream we have a problem. Just abandon the whole thing. */ |
5366 | if (targetByte == 0) { |
5367 | drflac__seek_to_first_frame(pFlac); /* Try to recover. */ |
5368 | return DRFLAC_FALSE; |
5369 | } |
5370 | |
5371 | /* Halve the byte location and continue. */ |
5372 | targetByte = rangeLo + ((rangeHi - rangeLo)/2); |
5373 | rangeHi = targetByte; |
5374 | } else { |
5375 | /* Getting here should mean that we have seeked to an appropriate byte. */ |
5376 | |
5377 | /* Clear the details of the FLAC frame so we don't misreport data. */ |
5378 | DRFLAC_ZERO_MEMORY(&pFlac->currentFLACFrame, sizeof(pFlac->currentFLACFrame)); |
5379 | |
5380 | /* |
5381 | 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 |
5382 | 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 |
5383 | so it needs to stay this way for now. |
5384 | */ |
5385 | #if 1 |
5386 | if (!drflac__read_and_decode_next_flac_frame(pFlac)) { |
5387 | /* Halve the byte location and continue. */ |
5388 | targetByte = rangeLo + ((rangeHi - rangeLo)/2); |
5389 | rangeHi = targetByte; |
5390 | } else { |
5391 | break; |
5392 | } |
5393 | #else |
5394 | if (!drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFLACFrame.header)) { |
5395 | /* Halve the byte location and continue. */ |
5396 | targetByte = rangeLo + ((rangeHi - rangeLo)/2); |
5397 | rangeHi = targetByte; |
5398 | } else { |
5399 | break; |
5400 | } |
5401 | #endif |
5402 | } |
5403 | |
5404 | /* We already tried this byte and there are no more to try, break out. */ |
5405 | if(targetByte == lastTargetByte) { |
5406 | return DRFLAC_FALSE; |
5407 | } |
5408 | } |
5409 | |
5410 | /* The current PCM frame needs to be updated based on the frame we just seeked to. */ |
5411 | drflac__get_pcm_frame_range_of_current_flac_frame(pFlac, &pFlac->currentPCMFrame, NULL); |
5412 | |
5413 | DRFLAC_ASSERT(targetByte <= rangeHi); |
5414 | |
5415 | *pLastSuccessfulSeekOffset = targetByte; |
5416 | return DRFLAC_TRUE; |
5417 | } |
5418 | |
5419 | static drflac_bool32 drflac__decode_flac_frame_and_seek_forward_by_pcm_frames(drflac* pFlac, drflac_uint64 offset) |
5420 | { |
2ff0b512 |
5421 | return drflac__seek_forward_by_pcm_frames(pFlac, offset) == offset; |
5422 | } |
5423 | |
5424 | |
5425 | static drflac_bool32 drflac__seek_to_pcm_frame__binary_search_internal(drflac* pFlac, drflac_uint64 pcmFrameIndex, drflac_uint64 byteRangeLo, drflac_uint64 byteRangeHi) |
5426 | { |
5427 | /* This assumes pFlac->currentPCMFrame is sitting on byteRangeLo upon entry. */ |
5428 | |
5429 | drflac_uint64 targetByte; |
5430 | drflac_uint64 pcmRangeLo = pFlac->totalPCMFrameCount; |
5431 | drflac_uint64 pcmRangeHi = 0; |
5432 | drflac_uint64 lastSuccessfulSeekOffset = (drflac_uint64)-1; |
5433 | drflac_uint64 closestSeekOffsetBeforeTargetPCMFrame = byteRangeLo; |
5434 | drflac_uint32 seekForwardThreshold = (pFlac->maxBlockSizeInPCMFrames != 0) ? pFlac->maxBlockSizeInPCMFrames*2 : 4096; |
5435 | |
5436 | targetByte = byteRangeLo + (drflac_uint64)(((drflac_int64)((pcmFrameIndex - pFlac->currentPCMFrame) * pFlac->channels * pFlac->bitsPerSample)/8.0f) * DRFLAC_BINARY_SEARCH_APPROX_COMPRESSION_RATIO); |
5437 | if (targetByte > byteRangeHi) { |
5438 | targetByte = byteRangeHi; |
5439 | } |
5440 | |
5441 | for (;;) { |
5442 | if (drflac__seek_to_approximate_flac_frame_to_byte(pFlac, targetByte, byteRangeLo, byteRangeHi, &lastSuccessfulSeekOffset)) { |
5443 | /* We found a FLAC frame. We need to check if it contains the sample we're looking for. */ |
5444 | drflac_uint64 newPCMRangeLo; |
5445 | drflac_uint64 newPCMRangeHi; |
5446 | drflac__get_pcm_frame_range_of_current_flac_frame(pFlac, &newPCMRangeLo, &newPCMRangeHi); |
5447 | |
5448 | /* If we selected the same frame, it means we should be pretty close. Just decode the rest. */ |
5449 | if (pcmRangeLo == newPCMRangeLo) { |
5450 | if (!drflac__seek_to_approximate_flac_frame_to_byte(pFlac, closestSeekOffsetBeforeTargetPCMFrame, closestSeekOffsetBeforeTargetPCMFrame, byteRangeHi, &lastSuccessfulSeekOffset)) { |
5451 | break; /* Failed to seek to closest frame. */ |
5452 | } |
5453 | |
5454 | if (drflac__decode_flac_frame_and_seek_forward_by_pcm_frames(pFlac, pcmFrameIndex - pFlac->currentPCMFrame)) { |
5455 | return DRFLAC_TRUE; |
5456 | } else { |
5457 | break; /* Failed to seek forward. */ |
5458 | } |
5459 | } |
5460 | |
5461 | pcmRangeLo = newPCMRangeLo; |
5462 | pcmRangeHi = newPCMRangeHi; |
5463 | |
5464 | if (pcmRangeLo <= pcmFrameIndex && pcmRangeHi >= pcmFrameIndex) { |
5465 | /* The target PCM frame is in this FLAC frame. */ |
5466 | if (drflac__decode_flac_frame_and_seek_forward_by_pcm_frames(pFlac, pcmFrameIndex - pFlac->currentPCMFrame) ) { |
5467 | return DRFLAC_TRUE; |
5468 | } else { |
5469 | break; /* Failed to seek to FLAC frame. */ |
5470 | } |
5471 | } else { |
5472 | const float approxCompressionRatio = (drflac_int64)(lastSuccessfulSeekOffset - pFlac->firstFLACFramePosInBytes) / ((drflac_int64)(pcmRangeLo * pFlac->channels * pFlac->bitsPerSample)/8.0f); |
5473 | |
5474 | if (pcmRangeLo > pcmFrameIndex) { |
5475 | /* We seeked too far forward. We need to move our target byte backward and try again. */ |
5476 | byteRangeHi = lastSuccessfulSeekOffset; |
5477 | if (byteRangeLo > byteRangeHi) { |
5478 | byteRangeLo = byteRangeHi; |
5479 | } |
5480 | |
5481 | targetByte = byteRangeLo + ((byteRangeHi - byteRangeLo) / 2); |
5482 | if (targetByte < byteRangeLo) { |
5483 | targetByte = byteRangeLo; |
5484 | } |
5485 | } else /*if (pcmRangeHi < pcmFrameIndex)*/ { |
5486 | /* We didn't seek far enough. We need to move our target byte forward and try again. */ |
5487 | |
5488 | /* If we're close enough we can just seek forward. */ |
5489 | if ((pcmFrameIndex - pcmRangeLo) < seekForwardThreshold) { |
5490 | if (drflac__decode_flac_frame_and_seek_forward_by_pcm_frames(pFlac, pcmFrameIndex - pFlac->currentPCMFrame)) { |
5491 | return DRFLAC_TRUE; |
5492 | } else { |
5493 | break; /* Failed to seek to FLAC frame. */ |
5494 | } |
5495 | } else { |
5496 | byteRangeLo = lastSuccessfulSeekOffset; |
5497 | if (byteRangeHi < byteRangeLo) { |
5498 | byteRangeHi = byteRangeLo; |
5499 | } |
5500 | |
5501 | targetByte = lastSuccessfulSeekOffset + (drflac_uint64)(((drflac_int64)((pcmFrameIndex-pcmRangeLo) * pFlac->channels * pFlac->bitsPerSample)/8.0f) * approxCompressionRatio); |
5502 | if (targetByte > byteRangeHi) { |
5503 | targetByte = byteRangeHi; |
5504 | } |
5505 | |
5506 | if (closestSeekOffsetBeforeTargetPCMFrame < lastSuccessfulSeekOffset) { |
5507 | closestSeekOffsetBeforeTargetPCMFrame = lastSuccessfulSeekOffset; |
5508 | } |
5509 | } |
5510 | } |
5511 | } |
5512 | } else { |
5513 | /* Getting here is really bad. We just recover as best we can, but moving to the first frame in the stream, and then abort. */ |
5514 | break; |
5515 | } |
5516 | } |
5517 | |
5518 | drflac__seek_to_first_frame(pFlac); /* <-- Try to recover. */ |
5519 | return DRFLAC_FALSE; |
5520 | } |
5521 | |
5522 | static drflac_bool32 drflac__seek_to_pcm_frame__binary_search(drflac* pFlac, drflac_uint64 pcmFrameIndex) |
5523 | { |
5524 | drflac_uint64 byteRangeLo; |
5525 | drflac_uint64 byteRangeHi; |
5526 | drflac_uint32 seekForwardThreshold = (pFlac->maxBlockSizeInPCMFrames != 0) ? pFlac->maxBlockSizeInPCMFrames*2 : 4096; |
5527 | |
5528 | /* Our algorithm currently assumes the FLAC stream is currently sitting at the start. */ |
5529 | if (drflac__seek_to_first_frame(pFlac) == DRFLAC_FALSE) { |
5530 | return DRFLAC_FALSE; |
5531 | } |
5532 | |
5533 | /* If we're close enough to the start, just move to the start and seek forward. */ |
5534 | if (pcmFrameIndex < seekForwardThreshold) { |
5535 | return drflac__seek_forward_by_pcm_frames(pFlac, pcmFrameIndex) == pcmFrameIndex; |
5536 | } |
5537 | |
5538 | /* |
5539 | 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 |
5540 | 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. |
5541 | */ |
5542 | byteRangeLo = pFlac->firstFLACFramePosInBytes; |
5543 | byteRangeHi = pFlac->firstFLACFramePosInBytes + (drflac_uint64)((drflac_int64)(pFlac->totalPCMFrameCount * pFlac->channels * pFlac->bitsPerSample)/8.0f); |
5544 | |
5545 | return drflac__seek_to_pcm_frame__binary_search_internal(pFlac, pcmFrameIndex, byteRangeLo, byteRangeHi); |
5546 | } |
5547 | #endif /* !DR_FLAC_NO_CRC */ |
5548 | |
5549 | static drflac_bool32 drflac__seek_to_pcm_frame__seek_table(drflac* pFlac, drflac_uint64 pcmFrameIndex) |
5550 | { |
5551 | drflac_uint32 iClosestSeekpoint = 0; |
5552 | drflac_bool32 isMidFrame = DRFLAC_FALSE; |
5553 | drflac_uint64 runningPCMFrameCount; |
5554 | drflac_uint32 iSeekpoint; |
5555 | |
5556 | |
5557 | DRFLAC_ASSERT(pFlac != NULL); |
5558 | |
5559 | if (pFlac->pSeekpoints == NULL || pFlac->seekpointCount == 0) { |
5560 | return DRFLAC_FALSE; |
5561 | } |
5562 | |
5563 | for (iSeekpoint = 0; iSeekpoint < pFlac->seekpointCount; ++iSeekpoint) { |
5564 | if (pFlac->pSeekpoints[iSeekpoint].firstPCMFrame >= pcmFrameIndex) { |
5565 | break; |
5566 | } |
5567 | |
5568 | iClosestSeekpoint = iSeekpoint; |
5569 | } |
5570 | |
5571 | /* There's been cases where the seek table contains only zeros. We need to do some basic validation on the closest seekpoint. */ |
5572 | if (pFlac->pSeekpoints[iClosestSeekpoint].pcmFrameCount == 0 || pFlac->pSeekpoints[iClosestSeekpoint].pcmFrameCount > pFlac->maxBlockSizeInPCMFrames) { |
5573 | return DRFLAC_FALSE; |
5574 | } |
5575 | if (pFlac->pSeekpoints[iClosestSeekpoint].firstPCMFrame > pFlac->totalPCMFrameCount && pFlac->totalPCMFrameCount > 0) { |
5576 | return DRFLAC_FALSE; |
5577 | } |
5578 | |
5579 | #if !defined(DR_FLAC_NO_CRC) |
5580 | /* 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. */ |
5581 | if (pFlac->totalPCMFrameCount > 0) { |
5582 | drflac_uint64 byteRangeLo; |
5583 | drflac_uint64 byteRangeHi; |
5584 | |
5585 | byteRangeHi = pFlac->firstFLACFramePosInBytes + (drflac_uint64)((drflac_int64)(pFlac->totalPCMFrameCount * pFlac->channels * pFlac->bitsPerSample)/8.0f); |
5586 | byteRangeLo = pFlac->firstFLACFramePosInBytes + pFlac->pSeekpoints[iClosestSeekpoint].flacFrameOffset; |
5587 | |
5588 | /* |
5589 | 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 |
5590 | value for byteRangeHi which will clamp it appropriately. |
5591 | |
5592 | Note that the next seekpoint must have an offset greater than the closest seekpoint because otherwise our binary search algorithm will break down. There |
5593 | 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. |
5594 | */ |
5595 | if (iClosestSeekpoint < pFlac->seekpointCount-1) { |
5596 | drflac_uint32 iNextSeekpoint = iClosestSeekpoint + 1; |
5597 | |
5598 | /* Basic validation on the seekpoints to ensure they're usable. */ |
5599 | if (pFlac->pSeekpoints[iClosestSeekpoint].flacFrameOffset >= pFlac->pSeekpoints[iNextSeekpoint].flacFrameOffset || pFlac->pSeekpoints[iNextSeekpoint].pcmFrameCount == 0) { |
5600 | return DRFLAC_FALSE; /* The next seekpoint doesn't look right. The seek table cannot be trusted from here. Abort. */ |
5601 | } |
5602 | |
5603 | if (pFlac->pSeekpoints[iNextSeekpoint].firstPCMFrame != (((drflac_uint64)0xFFFFFFFF << 32) | 0xFFFFFFFF)) { /* Make sure it's not a placeholder seekpoint. */ |
5604 | byteRangeHi = pFlac->firstFLACFramePosInBytes + pFlac->pSeekpoints[iNextSeekpoint].flacFrameOffset - 1; /* byteRangeHi must be zero based. */ |
5605 | } |
5606 | } |
5607 | |
5608 | if (drflac__seek_to_byte(&pFlac->bs, pFlac->firstFLACFramePosInBytes + pFlac->pSeekpoints[iClosestSeekpoint].flacFrameOffset)) { |
5609 | if (drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFLACFrame.header)) { |
5610 | drflac__get_pcm_frame_range_of_current_flac_frame(pFlac, &pFlac->currentPCMFrame, NULL); |
5611 | |
5612 | if (drflac__seek_to_pcm_frame__binary_search_internal(pFlac, pcmFrameIndex, byteRangeLo, byteRangeHi)) { |
5613 | return DRFLAC_TRUE; |
5614 | } |
5615 | } |
5616 | } |
5617 | } |
5618 | #endif /* !DR_FLAC_NO_CRC */ |
5619 | |
5620 | /* Getting here means we need to use a slower algorithm because the binary search method failed or cannot be used. */ |
5621 | |
5622 | /* |
5623 | 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 |
5624 | from the seekpoint's first sample. |
5625 | */ |
5626 | if (pcmFrameIndex >= pFlac->currentPCMFrame && pFlac->pSeekpoints[iClosestSeekpoint].firstPCMFrame <= pFlac->currentPCMFrame) { |
5627 | /* Optimized case. Just seek forward from where we are. */ |
5628 | runningPCMFrameCount = pFlac->currentPCMFrame; |
5629 | |
5630 | /* The frame header for the first frame may not yet have been read. We need to do that if necessary. */ |
5631 | if (pFlac->currentPCMFrame == 0 && pFlac->currentFLACFrame.pcmFramesRemaining == 0) { |
5632 | if (!drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFLACFrame.header)) { |
5633 | return DRFLAC_FALSE; |
5634 | } |
5635 | } else { |
5636 | isMidFrame = DRFLAC_TRUE; |
5637 | } |
5638 | } else { |
5639 | /* Slower case. Seek to the start of the seekpoint and then seek forward from there. */ |
5640 | runningPCMFrameCount = pFlac->pSeekpoints[iClosestSeekpoint].firstPCMFrame; |
5641 | |
5642 | if (!drflac__seek_to_byte(&pFlac->bs, pFlac->firstFLACFramePosInBytes + pFlac->pSeekpoints[iClosestSeekpoint].flacFrameOffset)) { |
5643 | return DRFLAC_FALSE; |
5644 | } |
5645 | |
5646 | /* Grab the frame the seekpoint is sitting on in preparation for the sample-exact seeking below. */ |
5647 | if (!drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFLACFrame.header)) { |
5648 | return DRFLAC_FALSE; |
5649 | } |
5650 | } |
5651 | |
5652 | for (;;) { |
5653 | drflac_uint64 pcmFrameCountInThisFLACFrame; |
5654 | drflac_uint64 firstPCMFrameInFLACFrame = 0; |
5655 | drflac_uint64 lastPCMFrameInFLACFrame = 0; |
5656 | |
5657 | drflac__get_pcm_frame_range_of_current_flac_frame(pFlac, &firstPCMFrameInFLACFrame, &lastPCMFrameInFLACFrame); |
5658 | |
5659 | pcmFrameCountInThisFLACFrame = (lastPCMFrameInFLACFrame - firstPCMFrameInFLACFrame) + 1; |
5660 | if (pcmFrameIndex < (runningPCMFrameCount + pcmFrameCountInThisFLACFrame)) { |
5661 | /* |
5662 | 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 |
5663 | it never existed and keep iterating. |
5664 | */ |
5665 | drflac_uint64 pcmFramesToDecode = pcmFrameIndex - runningPCMFrameCount; |
5666 | |
5667 | if (!isMidFrame) { |
5668 | drflac_result result = drflac__decode_flac_frame(pFlac); |
5669 | if (result == DRFLAC_SUCCESS) { |
5670 | /* The frame is valid. We just need to skip over some samples to ensure it's sample-exact. */ |
5671 | return drflac__seek_forward_by_pcm_frames(pFlac, pcmFramesToDecode) == pcmFramesToDecode; /* <-- If this fails, something bad has happened (it should never fail). */ |
5672 | } else { |
5673 | if (result == DRFLAC_CRC_MISMATCH) { |
5674 | goto next_iteration; /* CRC mismatch. Pretend this frame never existed. */ |
5675 | } else { |
5676 | return DRFLAC_FALSE; |
5677 | } |
5678 | } |
5679 | } else { |
5680 | /* We started seeking mid-frame which means we need to skip the frame decoding part. */ |
5681 | return drflac__seek_forward_by_pcm_frames(pFlac, pcmFramesToDecode) == pcmFramesToDecode; |
5682 | } |
5683 | } else { |
5684 | /* |
5685 | 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 |
5686 | frame never existed and leave the running sample count untouched. |
5687 | */ |
5688 | if (!isMidFrame) { |
5689 | drflac_result result = drflac__seek_to_next_flac_frame(pFlac); |
5690 | if (result == DRFLAC_SUCCESS) { |
5691 | runningPCMFrameCount += pcmFrameCountInThisFLACFrame; |
5692 | } else { |
5693 | if (result == DRFLAC_CRC_MISMATCH) { |
5694 | goto next_iteration; /* CRC mismatch. Pretend this frame never existed. */ |
5695 | } else { |
5696 | return DRFLAC_FALSE; |
5697 | } |
5698 | } |
5699 | } else { |
5700 | /* |
5701 | We started seeking mid-frame which means we need to seek by reading to the end of the frame instead of with |
5702 | drflac__seek_to_next_flac_frame() which only works if the decoder is sitting on the byte just after the frame header. |
5703 | */ |
5704 | runningPCMFrameCount += pFlac->currentFLACFrame.pcmFramesRemaining; |
5705 | pFlac->currentFLACFrame.pcmFramesRemaining = 0; |
5706 | isMidFrame = DRFLAC_FALSE; |
5707 | } |
5708 | |
5709 | /* If we are seeking to the end of the file and we've just hit it, we're done. */ |
5710 | if (pcmFrameIndex == pFlac->totalPCMFrameCount && runningPCMFrameCount == pFlac->totalPCMFrameCount) { |
5711 | return DRFLAC_TRUE; |
5712 | } |
5713 | } |
5714 | |
5715 | next_iteration: |
5716 | /* Grab the next frame in preparation for the next iteration. */ |
5717 | if (!drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFLACFrame.header)) { |
5718 | return DRFLAC_FALSE; |
5719 | } |
5720 | } |
5721 | } |
5722 | |
5723 | |
5724 | #ifndef DR_FLAC_NO_OGG |
5725 | typedef struct |
5726 | { |
5727 | drflac_uint8 capturePattern[4]; /* Should be "OggS" */ |
5728 | drflac_uint8 structureVersion; /* Always 0. */ |
5729 | drflac_uint8 headerType; |
5730 | drflac_uint64 granulePosition; |
5731 | drflac_uint32 serialNumber; |
5732 | drflac_uint32 sequenceNumber; |
5733 | drflac_uint32 checksum; |
5734 | drflac_uint8 segmentCount; |
5735 | drflac_uint8 segmentTable[255]; |
5736 | } drflac_ogg_page_header; |
5737 | #endif |
5738 | |
5739 | typedef struct |
5740 | { |
5741 | drflac_read_proc onRead; |
5742 | drflac_seek_proc onSeek; |
5743 | drflac_meta_proc onMeta; |
5744 | drflac_container container; |
5745 | void* pUserData; |
5746 | void* pUserDataMD; |
5747 | drflac_uint32 sampleRate; |
5748 | drflac_uint8 channels; |
5749 | drflac_uint8 bitsPerSample; |
5750 | drflac_uint64 totalPCMFrameCount; |
5751 | drflac_uint16 maxBlockSizeInPCMFrames; |
5752 | drflac_uint64 runningFilePos; |
5753 | drflac_bool32 hasStreamInfoBlock; |
5754 | drflac_bool32 hasMetadataBlocks; |
5755 | drflac_bs bs; /* <-- A bit streamer is required for loading data during initialization. */ |
5756 | drflac_frame_header firstFrameHeader; /* <-- The header of the first frame that was read during relaxed initalization. Only set if there is no STREAMINFO block. */ |
5757 | |
5758 | #ifndef DR_FLAC_NO_OGG |
5759 | drflac_uint32 oggSerial; |
5760 | drflac_uint64 oggFirstBytePos; |
5761 | drflac_ogg_page_header oggBosHeader; |
5762 | #endif |
5763 | } drflac_init_info; |
5764 | |
5765 | static DRFLAC_INLINE void drflac__decode_block_header(drflac_uint32 blockHeader, drflac_uint8* isLastBlock, drflac_uint8* blockType, drflac_uint32* blockSize) |
5766 | { |
5767 | blockHeader = drflac__be2host_32(blockHeader); |
5768 | *isLastBlock = (drflac_uint8)((blockHeader & 0x80000000UL) >> 31); |
5769 | *blockType = (drflac_uint8)((blockHeader & 0x7F000000UL) >> 24); |
5770 | *blockSize = (blockHeader & 0x00FFFFFFUL); |
5771 | } |
5772 | |
5773 | 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) |
5774 | { |
5775 | drflac_uint32 blockHeader; |
5776 | |
5777 | *blockSize = 0; |
5778 | if (onRead(pUserData, &blockHeader, 4) != 4) { |
5779 | return DRFLAC_FALSE; |
5780 | } |
5781 | |
5782 | drflac__decode_block_header(blockHeader, isLastBlock, blockType, blockSize); |
5783 | return DRFLAC_TRUE; |
5784 | } |
5785 | |
5786 | static drflac_bool32 drflac__read_streaminfo(drflac_read_proc onRead, void* pUserData, drflac_streaminfo* pStreamInfo) |
5787 | { |
5788 | drflac_uint32 blockSizes; |
5789 | drflac_uint64 frameSizes = 0; |
5790 | drflac_uint64 importantProps; |
5791 | drflac_uint8 md5[16]; |
5792 | |
5793 | /* min/max block size. */ |
5794 | if (onRead(pUserData, &blockSizes, 4) != 4) { |
5795 | return DRFLAC_FALSE; |
5796 | } |
5797 | |
5798 | /* min/max frame size. */ |
5799 | if (onRead(pUserData, &frameSizes, 6) != 6) { |
5800 | return DRFLAC_FALSE; |
5801 | } |
5802 | |
5803 | /* Sample rate, channels, bits per sample and total sample count. */ |
5804 | if (onRead(pUserData, &importantProps, 8) != 8) { |
5805 | return DRFLAC_FALSE; |
5806 | } |
5807 | |
5808 | /* MD5 */ |
5809 | if (onRead(pUserData, md5, sizeof(md5)) != sizeof(md5)) { |
5810 | return DRFLAC_FALSE; |
5811 | } |
5812 | |
5813 | blockSizes = drflac__be2host_32(blockSizes); |
5814 | frameSizes = drflac__be2host_64(frameSizes); |
5815 | importantProps = drflac__be2host_64(importantProps); |
5816 | |
5817 | pStreamInfo->minBlockSizeInPCMFrames = (drflac_uint16)((blockSizes & 0xFFFF0000) >> 16); |
5818 | pStreamInfo->maxBlockSizeInPCMFrames = (drflac_uint16) (blockSizes & 0x0000FFFF); |
5819 | pStreamInfo->minFrameSizeInPCMFrames = (drflac_uint32)((frameSizes & (((drflac_uint64)0x00FFFFFF << 16) << 24)) >> 40); |
5820 | pStreamInfo->maxFrameSizeInPCMFrames = (drflac_uint32)((frameSizes & (((drflac_uint64)0x00FFFFFF << 16) << 0)) >> 16); |
5821 | pStreamInfo->sampleRate = (drflac_uint32)((importantProps & (((drflac_uint64)0x000FFFFF << 16) << 28)) >> 44); |
5822 | pStreamInfo->channels = (drflac_uint8 )((importantProps & (((drflac_uint64)0x0000000E << 16) << 24)) >> 41) + 1; |
5823 | pStreamInfo->bitsPerSample = (drflac_uint8 )((importantProps & (((drflac_uint64)0x0000001F << 16) << 20)) >> 36) + 1; |
5824 | pStreamInfo->totalPCMFrameCount = ((importantProps & ((((drflac_uint64)0x0000000F << 16) << 16) | 0xFFFFFFFF))); |
5825 | DRFLAC_COPY_MEMORY(pStreamInfo->md5, md5, sizeof(md5)); |
5826 | |
5827 | return DRFLAC_TRUE; |
5828 | } |
5829 | |
5830 | |
5831 | static void* drflac__malloc_default(size_t sz, void* pUserData) |
5832 | { |
5833 | (void)pUserData; |
5834 | return DRFLAC_MALLOC(sz); |
5835 | } |
5836 | |
5837 | static void* drflac__realloc_default(void* p, size_t sz, void* pUserData) |
5838 | { |
5839 | (void)pUserData; |
5840 | return DRFLAC_REALLOC(p, sz); |
5841 | } |
5842 | |
5843 | static void drflac__free_default(void* p, void* pUserData) |
5844 | { |
5845 | (void)pUserData; |
5846 | DRFLAC_FREE(p); |
5847 | } |
5848 | |
5849 | |
5850 | static void* drflac__malloc_from_callbacks(size_t sz, const drflac_allocation_callbacks* pAllocationCallbacks) |
5851 | { |
5852 | if (pAllocationCallbacks == NULL) { |
5853 | return NULL; |
5854 | } |
5855 | |
5856 | if (pAllocationCallbacks->onMalloc != NULL) { |
5857 | return pAllocationCallbacks->onMalloc(sz, pAllocationCallbacks->pUserData); |
5858 | } |
5859 | |
5860 | /* Try using realloc(). */ |
5861 | if (pAllocationCallbacks->onRealloc != NULL) { |
5862 | return pAllocationCallbacks->onRealloc(NULL, sz, pAllocationCallbacks->pUserData); |
5863 | } |
5864 | |
5865 | return NULL; |
5866 | } |
5867 | |
5868 | static void* drflac__realloc_from_callbacks(void* p, size_t szNew, size_t szOld, const drflac_allocation_callbacks* pAllocationCallbacks) |
5869 | { |
5870 | if (pAllocationCallbacks == NULL) { |
5871 | return NULL; |
5872 | } |
5873 | |
5874 | if (pAllocationCallbacks->onRealloc != NULL) { |
5875 | return pAllocationCallbacks->onRealloc(p, szNew, pAllocationCallbacks->pUserData); |
5876 | } |
5877 | |
5878 | /* Try emulating realloc() in terms of malloc()/free(). */ |
5879 | if (pAllocationCallbacks->onMalloc != NULL && pAllocationCallbacks->onFree != NULL) { |
5880 | void* p2; |
5881 | |
5882 | p2 = pAllocationCallbacks->onMalloc(szNew, pAllocationCallbacks->pUserData); |
5883 | if (p2 == NULL) { |
5884 | return NULL; |
5885 | } |
5886 | |
5887 | if (p != NULL) { |
5888 | DRFLAC_COPY_MEMORY(p2, p, szOld); |
5889 | pAllocationCallbacks->onFree(p, pAllocationCallbacks->pUserData); |
5890 | } |
5891 | |
5892 | return p2; |
5893 | } |
5894 | |
5895 | return NULL; |
5896 | } |
5897 | |
5898 | static void drflac__free_from_callbacks(void* p, const drflac_allocation_callbacks* pAllocationCallbacks) |
5899 | { |
5900 | if (p == NULL || pAllocationCallbacks == NULL) { |
5901 | return; |
5902 | } |
5903 | |
5904 | if (pAllocationCallbacks->onFree != NULL) { |
5905 | pAllocationCallbacks->onFree(p, pAllocationCallbacks->pUserData); |
5906 | } |
5907 | } |
5908 | |
5909 | |
5910 | 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) |
5911 | { |
5912 | /* |
5913 | 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 |
5914 | we'll be sitting on byte 42. |
5915 | */ |
5916 | drflac_uint64 runningFilePos = 42; |
5917 | drflac_uint64 seektablePos = 0; |
5918 | drflac_uint32 seektableSize = 0; |
5919 | |
5920 | for (;;) { |
5921 | drflac_metadata metadata; |
5922 | drflac_uint8 isLastBlock = 0; |
5923 | drflac_uint8 blockType; |
5924 | drflac_uint32 blockSize; |
5925 | if (drflac__read_and_decode_block_header(onRead, pUserData, &isLastBlock, &blockType, &blockSize) == DRFLAC_FALSE) { |
5926 | return DRFLAC_FALSE; |
5927 | } |
5928 | runningFilePos += 4; |
5929 | |
5930 | metadata.type = blockType; |
5931 | metadata.pRawData = NULL; |
5932 | metadata.rawDataSize = 0; |
5933 | |
5934 | switch (blockType) |
5935 | { |
5936 | case DRFLAC_METADATA_BLOCK_TYPE_APPLICATION: |
5937 | { |
5938 | if (blockSize < 4) { |
5939 | return DRFLAC_FALSE; |
5940 | } |
5941 | |
5942 | if (onMeta) { |
5943 | void* pRawData = drflac__malloc_from_callbacks(blockSize, pAllocationCallbacks); |
5944 | if (pRawData == NULL) { |
5945 | return DRFLAC_FALSE; |
5946 | } |
5947 | |
5948 | if (onRead(pUserData, pRawData, blockSize) != blockSize) { |
5949 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
5950 | return DRFLAC_FALSE; |
5951 | } |
5952 | |
5953 | metadata.pRawData = pRawData; |
5954 | metadata.rawDataSize = blockSize; |
5955 | metadata.data.application.id = drflac__be2host_32(*(drflac_uint32*)pRawData); |
5956 | metadata.data.application.pData = (const void*)((drflac_uint8*)pRawData + sizeof(drflac_uint32)); |
5957 | metadata.data.application.dataSize = blockSize - sizeof(drflac_uint32); |
5958 | onMeta(pUserDataMD, &metadata); |
5959 | |
5960 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
5961 | } |
5962 | } break; |
5963 | |
5964 | case DRFLAC_METADATA_BLOCK_TYPE_SEEKTABLE: |
5965 | { |
5966 | seektablePos = runningFilePos; |
5967 | seektableSize = blockSize; |
5968 | |
5969 | if (onMeta) { |
5970 | drflac_uint32 iSeekpoint; |
5971 | void* pRawData; |
5972 | |
5973 | pRawData = drflac__malloc_from_callbacks(blockSize, pAllocationCallbacks); |
5974 | if (pRawData == NULL) { |
5975 | return DRFLAC_FALSE; |
5976 | } |
5977 | |
5978 | if (onRead(pUserData, pRawData, blockSize) != blockSize) { |
5979 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
5980 | return DRFLAC_FALSE; |
5981 | } |
5982 | |
5983 | metadata.pRawData = pRawData; |
5984 | metadata.rawDataSize = blockSize; |
5985 | metadata.data.seektable.seekpointCount = blockSize/sizeof(drflac_seekpoint); |
5986 | metadata.data.seektable.pSeekpoints = (const drflac_seekpoint*)pRawData; |
5987 | |
5988 | /* Endian swap. */ |
5989 | for (iSeekpoint = 0; iSeekpoint < metadata.data.seektable.seekpointCount; ++iSeekpoint) { |
5990 | drflac_seekpoint* pSeekpoint = (drflac_seekpoint*)pRawData + iSeekpoint; |
5991 | pSeekpoint->firstPCMFrame = drflac__be2host_64(pSeekpoint->firstPCMFrame); |
5992 | pSeekpoint->flacFrameOffset = drflac__be2host_64(pSeekpoint->flacFrameOffset); |
5993 | pSeekpoint->pcmFrameCount = drflac__be2host_16(pSeekpoint->pcmFrameCount); |
5994 | } |
5995 | |
5996 | onMeta(pUserDataMD, &metadata); |
5997 | |
5998 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
5999 | } |
6000 | } break; |
6001 | |
6002 | case DRFLAC_METADATA_BLOCK_TYPE_VORBIS_COMMENT: |
6003 | { |
6004 | if (blockSize < 8) { |
6005 | return DRFLAC_FALSE; |
6006 | } |
6007 | |
6008 | if (onMeta) { |
6009 | void* pRawData; |
6010 | const char* pRunningData; |
6011 | const char* pRunningDataEnd; |
6012 | drflac_uint32 i; |
6013 | |
6014 | pRawData = drflac__malloc_from_callbacks(blockSize, pAllocationCallbacks); |
6015 | if (pRawData == NULL) { |
6016 | return DRFLAC_FALSE; |
6017 | } |
6018 | |
6019 | if (onRead(pUserData, pRawData, blockSize) != blockSize) { |
6020 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
6021 | return DRFLAC_FALSE; |
6022 | } |
6023 | |
6024 | metadata.pRawData = pRawData; |
6025 | metadata.rawDataSize = blockSize; |
6026 | |
6027 | pRunningData = (const char*)pRawData; |
6028 | pRunningDataEnd = (const char*)pRawData + blockSize; |
6029 | |
6030 | metadata.data.vorbis_comment.vendorLength = drflac__le2host_32(*(const drflac_uint32*)pRunningData); pRunningData += 4; |
6031 | |
6032 | /* Need space for the rest of the block */ |
6033 | if ((pRunningDataEnd - pRunningData) - 4 < (drflac_int64)metadata.data.vorbis_comment.vendorLength) { /* <-- Note the order of operations to avoid overflow to a valid value */ |
6034 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
6035 | return DRFLAC_FALSE; |
6036 | } |
6037 | metadata.data.vorbis_comment.vendor = pRunningData; pRunningData += metadata.data.vorbis_comment.vendorLength; |
6038 | metadata.data.vorbis_comment.commentCount = drflac__le2host_32(*(const drflac_uint32*)pRunningData); pRunningData += 4; |
6039 | |
6040 | /* Need space for 'commentCount' comments after the block, which at minimum is a drflac_uint32 per comment */ |
6041 | if ((pRunningDataEnd - pRunningData) / sizeof(drflac_uint32) < metadata.data.vorbis_comment.commentCount) { /* <-- Note the order of operations to avoid overflow to a valid value */ |
6042 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
6043 | return DRFLAC_FALSE; |
6044 | } |
6045 | metadata.data.vorbis_comment.pComments = pRunningData; |
6046 | |
6047 | /* Check that the comments section is valid before passing it to the callback */ |
6048 | for (i = 0; i < metadata.data.vorbis_comment.commentCount; ++i) { |
6049 | drflac_uint32 commentLength; |
6050 | |
6051 | if (pRunningDataEnd - pRunningData < 4) { |
6052 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
6053 | return DRFLAC_FALSE; |
6054 | } |
6055 | |
6056 | commentLength = drflac__le2host_32(*(const drflac_uint32*)pRunningData); pRunningData += 4; |
6057 | if (pRunningDataEnd - pRunningData < (drflac_int64)commentLength) { /* <-- Note the order of operations to avoid overflow to a valid value */ |
6058 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
6059 | return DRFLAC_FALSE; |
6060 | } |
6061 | pRunningData += commentLength; |
6062 | } |
6063 | |
6064 | onMeta(pUserDataMD, &metadata); |
6065 | |
6066 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
6067 | } |
6068 | } break; |
6069 | |
6070 | case DRFLAC_METADATA_BLOCK_TYPE_CUESHEET: |
6071 | { |
6072 | if (blockSize < 396) { |
6073 | return DRFLAC_FALSE; |
6074 | } |
6075 | |
6076 | if (onMeta) { |
6077 | void* pRawData; |
6078 | const char* pRunningData; |
6079 | const char* pRunningDataEnd; |
6080 | drflac_uint8 iTrack; |
6081 | drflac_uint8 iIndex; |
6082 | |
6083 | pRawData = drflac__malloc_from_callbacks(blockSize, pAllocationCallbacks); |
6084 | if (pRawData == NULL) { |
6085 | return DRFLAC_FALSE; |
6086 | } |
6087 | |
6088 | if (onRead(pUserData, pRawData, blockSize) != blockSize) { |
6089 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
6090 | return DRFLAC_FALSE; |
6091 | } |
6092 | |
6093 | metadata.pRawData = pRawData; |
6094 | metadata.rawDataSize = blockSize; |
6095 | |
6096 | pRunningData = (const char*)pRawData; |
6097 | pRunningDataEnd = (const char*)pRawData + blockSize; |
6098 | |
6099 | DRFLAC_COPY_MEMORY(metadata.data.cuesheet.catalog, pRunningData, 128); pRunningData += 128; |
6100 | metadata.data.cuesheet.leadInSampleCount = drflac__be2host_64(*(const drflac_uint64*)pRunningData); pRunningData += 8; |
6101 | metadata.data.cuesheet.isCD = (pRunningData[0] & 0x80) != 0; pRunningData += 259; |
6102 | metadata.data.cuesheet.trackCount = pRunningData[0]; pRunningData += 1; |
6103 | metadata.data.cuesheet.pTrackData = pRunningData; |
6104 | |
6105 | /* Check that the cuesheet tracks are valid before passing it to the callback */ |
6106 | for (iTrack = 0; iTrack < metadata.data.cuesheet.trackCount; ++iTrack) { |
6107 | drflac_uint8 indexCount; |
6108 | drflac_uint32 indexPointSize; |
6109 | |
6110 | if (pRunningDataEnd - pRunningData < 36) { |
6111 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
6112 | return DRFLAC_FALSE; |
6113 | } |
6114 | |
6115 | /* Skip to the index point count */ |
6116 | pRunningData += 35; |
6117 | indexCount = pRunningData[0]; pRunningData += 1; |
6118 | indexPointSize = indexCount * sizeof(drflac_cuesheet_track_index); |
6119 | if (pRunningDataEnd - pRunningData < (drflac_int64)indexPointSize) { |
6120 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
6121 | return DRFLAC_FALSE; |
6122 | } |
6123 | |
6124 | /* Endian swap. */ |
6125 | for (iIndex = 0; iIndex < indexCount; ++iIndex) { |
6126 | drflac_cuesheet_track_index* pTrack = (drflac_cuesheet_track_index*)pRunningData; |
6127 | pRunningData += sizeof(drflac_cuesheet_track_index); |
6128 | pTrack->offset = drflac__be2host_64(pTrack->offset); |
6129 | } |
6130 | } |
6131 | |
6132 | onMeta(pUserDataMD, &metadata); |
6133 | |
6134 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
6135 | } |
6136 | } break; |
6137 | |
6138 | case DRFLAC_METADATA_BLOCK_TYPE_PICTURE: |
6139 | { |
6140 | if (blockSize < 32) { |
6141 | return DRFLAC_FALSE; |
6142 | } |
6143 | |
6144 | if (onMeta) { |
6145 | void* pRawData; |
6146 | const char* pRunningData; |
6147 | const char* pRunningDataEnd; |
6148 | |
6149 | pRawData = drflac__malloc_from_callbacks(blockSize, pAllocationCallbacks); |
6150 | if (pRawData == NULL) { |
6151 | return DRFLAC_FALSE; |
6152 | } |
6153 | |
6154 | if (onRead(pUserData, pRawData, blockSize) != blockSize) { |
6155 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
6156 | return DRFLAC_FALSE; |
6157 | } |
6158 | |
6159 | metadata.pRawData = pRawData; |
6160 | metadata.rawDataSize = blockSize; |
6161 | |
6162 | pRunningData = (const char*)pRawData; |
6163 | pRunningDataEnd = (const char*)pRawData + blockSize; |
6164 | |
6165 | metadata.data.picture.type = drflac__be2host_32(*(const drflac_uint32*)pRunningData); pRunningData += 4; |
6166 | metadata.data.picture.mimeLength = drflac__be2host_32(*(const drflac_uint32*)pRunningData); pRunningData += 4; |
6167 | |
6168 | /* Need space for the rest of the block */ |
6169 | if ((pRunningDataEnd - pRunningData) - 24 < (drflac_int64)metadata.data.picture.mimeLength) { /* <-- Note the order of operations to avoid overflow to a valid value */ |
6170 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
6171 | return DRFLAC_FALSE; |
6172 | } |
6173 | metadata.data.picture.mime = pRunningData; pRunningData += metadata.data.picture.mimeLength; |
6174 | metadata.data.picture.descriptionLength = drflac__be2host_32(*(const drflac_uint32*)pRunningData); pRunningData += 4; |
6175 | |
6176 | /* Need space for the rest of the block */ |
6177 | if ((pRunningDataEnd - pRunningData) - 20 < (drflac_int64)metadata.data.picture.descriptionLength) { /* <-- Note the order of operations to avoid overflow to a valid value */ |
6178 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
6179 | return DRFLAC_FALSE; |
6180 | } |
6181 | metadata.data.picture.description = pRunningData; pRunningData += metadata.data.picture.descriptionLength; |
6182 | metadata.data.picture.width = drflac__be2host_32(*(const drflac_uint32*)pRunningData); pRunningData += 4; |
6183 | metadata.data.picture.height = drflac__be2host_32(*(const drflac_uint32*)pRunningData); pRunningData += 4; |
6184 | metadata.data.picture.colorDepth = drflac__be2host_32(*(const drflac_uint32*)pRunningData); pRunningData += 4; |
6185 | metadata.data.picture.indexColorCount = drflac__be2host_32(*(const drflac_uint32*)pRunningData); pRunningData += 4; |
6186 | metadata.data.picture.pictureDataSize = drflac__be2host_32(*(const drflac_uint32*)pRunningData); pRunningData += 4; |
6187 | metadata.data.picture.pPictureData = (const drflac_uint8*)pRunningData; |
6188 | |
6189 | /* Need space for the picture after the block */ |
6190 | if (pRunningDataEnd - pRunningData < (drflac_int64)metadata.data.picture.pictureDataSize) { /* <-- Note the order of operations to avoid overflow to a valid value */ |
6191 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
6192 | return DRFLAC_FALSE; |
6193 | } |
6194 | |
6195 | onMeta(pUserDataMD, &metadata); |
6196 | |
6197 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
6198 | } |
6199 | } break; |
6200 | |
6201 | case DRFLAC_METADATA_BLOCK_TYPE_PADDING: |
6202 | { |
6203 | if (onMeta) { |
6204 | metadata.data.padding.unused = 0; |
6205 | |
6206 | /* 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. */ |
6207 | if (!onSeek(pUserData, blockSize, drflac_seek_origin_current)) { |
6208 | 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. */ |
6209 | } else { |
6210 | onMeta(pUserDataMD, &metadata); |
6211 | } |
6212 | } |
6213 | } break; |
6214 | |
6215 | case DRFLAC_METADATA_BLOCK_TYPE_INVALID: |
6216 | { |
6217 | /* Invalid chunk. Just skip over this one. */ |
6218 | if (onMeta) { |
6219 | if (!onSeek(pUserData, blockSize, drflac_seek_origin_current)) { |
6220 | 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. */ |
6221 | } |
6222 | } |
6223 | } break; |
6224 | |
6225 | default: |
6226 | { |
6227 | /* |
6228 | It's an unknown chunk, but not necessarily invalid. There's a chance more metadata blocks might be defined later on, so we |
6229 | can at the very least report the chunk to the application and let it look at the raw data. |
6230 | */ |
6231 | if (onMeta) { |
6232 | void* pRawData = drflac__malloc_from_callbacks(blockSize, pAllocationCallbacks); |
6233 | if (pRawData == NULL) { |
6234 | return DRFLAC_FALSE; |
6235 | } |
6236 | |
6237 | if (onRead(pUserData, pRawData, blockSize) != blockSize) { |
6238 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
6239 | return DRFLAC_FALSE; |
6240 | } |
6241 | |
6242 | metadata.pRawData = pRawData; |
6243 | metadata.rawDataSize = blockSize; |
6244 | onMeta(pUserDataMD, &metadata); |
6245 | |
6246 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
6247 | } |
6248 | } break; |
6249 | } |
6250 | |
6251 | /* 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. */ |
6252 | if (onMeta == NULL && blockSize > 0) { |
6253 | if (!onSeek(pUserData, blockSize, drflac_seek_origin_current)) { |
6254 | isLastBlock = DRFLAC_TRUE; |
6255 | } |
6256 | } |
6257 | |
6258 | runningFilePos += blockSize; |
6259 | if (isLastBlock) { |
6260 | break; |
6261 | } |
6262 | } |
6263 | |
6264 | *pSeektablePos = seektablePos; |
6265 | *pSeektableSize = seektableSize; |
6266 | *pFirstFramePos = runningFilePos; |
6267 | |
6268 | return DRFLAC_TRUE; |
6269 | } |
6270 | |
6271 | 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) |
6272 | { |
6273 | /* Pre Condition: The bit stream should be sitting just past the 4-byte id header. */ |
6274 | |
6275 | drflac_uint8 isLastBlock; |
6276 | drflac_uint8 blockType; |
6277 | drflac_uint32 blockSize; |
6278 | |
6279 | (void)onSeek; |
6280 | |
6281 | pInit->container = drflac_container_native; |
6282 | |
6283 | /* The first metadata block should be the STREAMINFO block. */ |
6284 | if (!drflac__read_and_decode_block_header(onRead, pUserData, &isLastBlock, &blockType, &blockSize)) { |
6285 | return DRFLAC_FALSE; |
6286 | } |
6287 | |
6288 | if (blockType != DRFLAC_METADATA_BLOCK_TYPE_STREAMINFO || blockSize != 34) { |
6289 | if (!relaxed) { |
6290 | /* We're opening in strict mode and the first block is not the STREAMINFO block. Error. */ |
6291 | return DRFLAC_FALSE; |
6292 | } else { |
6293 | /* |
6294 | Relaxed mode. To open from here we need to just find the first frame and set the sample rate, etc. to whatever is defined |
6295 | for that frame. |
6296 | */ |
6297 | pInit->hasStreamInfoBlock = DRFLAC_FALSE; |
6298 | pInit->hasMetadataBlocks = DRFLAC_FALSE; |
6299 | |
6300 | if (!drflac__read_next_flac_frame_header(&pInit->bs, 0, &pInit->firstFrameHeader)) { |
6301 | return DRFLAC_FALSE; /* Couldn't find a frame. */ |
6302 | } |
6303 | |
6304 | if (pInit->firstFrameHeader.bitsPerSample == 0) { |
6305 | return DRFLAC_FALSE; /* Failed to initialize because the first frame depends on the STREAMINFO block, which does not exist. */ |
6306 | } |
6307 | |
6308 | pInit->sampleRate = pInit->firstFrameHeader.sampleRate; |
6309 | pInit->channels = drflac__get_channel_count_from_channel_assignment(pInit->firstFrameHeader.channelAssignment); |
6310 | pInit->bitsPerSample = pInit->firstFrameHeader.bitsPerSample; |
6311 | pInit->maxBlockSizeInPCMFrames = 65535; /* <-- See notes here: https://xiph.org/flac/format.html#metadata_block_streaminfo */ |
6312 | return DRFLAC_TRUE; |
6313 | } |
6314 | } else { |
6315 | drflac_streaminfo streaminfo; |
6316 | if (!drflac__read_streaminfo(onRead, pUserData, &streaminfo)) { |
6317 | return DRFLAC_FALSE; |
6318 | } |
6319 | |
6320 | pInit->hasStreamInfoBlock = DRFLAC_TRUE; |
6321 | pInit->sampleRate = streaminfo.sampleRate; |
6322 | pInit->channels = streaminfo.channels; |
6323 | pInit->bitsPerSample = streaminfo.bitsPerSample; |
6324 | pInit->totalPCMFrameCount = streaminfo.totalPCMFrameCount; |
6325 | pInit->maxBlockSizeInPCMFrames = streaminfo.maxBlockSizeInPCMFrames; /* Don't care about the min block size - only the max (used for determining the size of the memory allocation). */ |
6326 | pInit->hasMetadataBlocks = !isLastBlock; |
6327 | |
6328 | if (onMeta) { |
6329 | drflac_metadata metadata; |
6330 | metadata.type = DRFLAC_METADATA_BLOCK_TYPE_STREAMINFO; |
6331 | metadata.pRawData = NULL; |
6332 | metadata.rawDataSize = 0; |
6333 | metadata.data.streaminfo = streaminfo; |
6334 | onMeta(pUserDataMD, &metadata); |
6335 | } |
6336 | |
6337 | return DRFLAC_TRUE; |
6338 | } |
6339 | } |
6340 | |
6341 | #ifndef DR_FLAC_NO_OGG |
6342 | #define DRFLAC_OGG_MAX_PAGE_SIZE 65307 |
6343 | #define DRFLAC_OGG_CAPTURE_PATTERN_CRC32 1605413199 /* CRC-32 of "OggS". */ |
6344 | |
6345 | typedef enum |
6346 | { |
6347 | drflac_ogg_recover_on_crc_mismatch, |
6348 | drflac_ogg_fail_on_crc_mismatch |
6349 | } drflac_ogg_crc_mismatch_recovery; |
6350 | |
6351 | #ifndef DR_FLAC_NO_CRC |
6352 | static drflac_uint32 drflac__crc32_table[] = { |
6353 | 0x00000000L, 0x04C11DB7L, 0x09823B6EL, 0x0D4326D9L, |
6354 | 0x130476DCL, 0x17C56B6BL, 0x1A864DB2L, 0x1E475005L, |
6355 | 0x2608EDB8L, 0x22C9F00FL, 0x2F8AD6D6L, 0x2B4BCB61L, |
6356 | 0x350C9B64L, 0x31CD86D3L, 0x3C8EA00AL, 0x384FBDBDL, |
6357 | 0x4C11DB70L, 0x48D0C6C7L, 0x4593E01EL, 0x4152FDA9L, |
6358 | 0x5F15ADACL, 0x5BD4B01BL, 0x569796C2L, 0x52568B75L, |
6359 | 0x6A1936C8L, 0x6ED82B7FL, 0x639B0DA6L, 0x675A1011L, |
6360 | 0x791D4014L, 0x7DDC5DA3L, 0x709F7B7AL, 0x745E66CDL, |
6361 | 0x9823B6E0L, 0x9CE2AB57L, 0x91A18D8EL, 0x95609039L, |
6362 | 0x8B27C03CL, 0x8FE6DD8BL, 0x82A5FB52L, 0x8664E6E5L, |
6363 | 0xBE2B5B58L, 0xBAEA46EFL, 0xB7A96036L, 0xB3687D81L, |
6364 | 0xAD2F2D84L, 0xA9EE3033L, 0xA4AD16EAL, 0xA06C0B5DL, |
6365 | 0xD4326D90L, 0xD0F37027L, 0xDDB056FEL, 0xD9714B49L, |
6366 | 0xC7361B4CL, 0xC3F706FBL, 0xCEB42022L, 0xCA753D95L, |
6367 | 0xF23A8028L, 0xF6FB9D9FL, 0xFBB8BB46L, 0xFF79A6F1L, |
6368 | 0xE13EF6F4L, 0xE5FFEB43L, 0xE8BCCD9AL, 0xEC7DD02DL, |
6369 | 0x34867077L, 0x30476DC0L, 0x3D044B19L, 0x39C556AEL, |
6370 | 0x278206ABL, 0x23431B1CL, 0x2E003DC5L, 0x2AC12072L, |
6371 | 0x128E9DCFL, 0x164F8078L, 0x1B0CA6A1L, 0x1FCDBB16L, |
6372 | 0x018AEB13L, 0x054BF6A4L, 0x0808D07DL, 0x0CC9CDCAL, |
6373 | 0x7897AB07L, 0x7C56B6B0L, 0x71159069L, 0x75D48DDEL, |
6374 | 0x6B93DDDBL, 0x6F52C06CL, 0x6211E6B5L, 0x66D0FB02L, |
6375 | 0x5E9F46BFL, 0x5A5E5B08L, 0x571D7DD1L, 0x53DC6066L, |
6376 | 0x4D9B3063L, 0x495A2DD4L, 0x44190B0DL, 0x40D816BAL, |
6377 | 0xACA5C697L, 0xA864DB20L, 0xA527FDF9L, 0xA1E6E04EL, |
6378 | 0xBFA1B04BL, 0xBB60ADFCL, 0xB6238B25L, 0xB2E29692L, |
6379 | 0x8AAD2B2FL, 0x8E6C3698L, 0x832F1041L, 0x87EE0DF6L, |
6380 | 0x99A95DF3L, 0x9D684044L, 0x902B669DL, 0x94EA7B2AL, |
6381 | 0xE0B41DE7L, 0xE4750050L, 0xE9362689L, 0xEDF73B3EL, |
6382 | 0xF3B06B3BL, 0xF771768CL, 0xFA325055L, 0xFEF34DE2L, |
6383 | 0xC6BCF05FL, 0xC27DEDE8L, 0xCF3ECB31L, 0xCBFFD686L, |
6384 | 0xD5B88683L, 0xD1799B34L, 0xDC3ABDEDL, 0xD8FBA05AL, |
6385 | 0x690CE0EEL, 0x6DCDFD59L, 0x608EDB80L, 0x644FC637L, |
6386 | 0x7A089632L, 0x7EC98B85L, 0x738AAD5CL, 0x774BB0EBL, |
6387 | 0x4F040D56L, 0x4BC510E1L, 0x46863638L, 0x42472B8FL, |
6388 | 0x5C007B8AL, 0x58C1663DL, 0x558240E4L, 0x51435D53L, |
6389 | 0x251D3B9EL, 0x21DC2629L, 0x2C9F00F0L, 0x285E1D47L, |
6390 | 0x36194D42L, 0x32D850F5L, 0x3F9B762CL, 0x3B5A6B9BL, |
6391 | 0x0315D626L, 0x07D4CB91L, 0x0A97ED48L, 0x0E56F0FFL, |
6392 | 0x1011A0FAL, 0x14D0BD4DL, 0x19939B94L, 0x1D528623L, |
6393 | 0xF12F560EL, 0xF5EE4BB9L, 0xF8AD6D60L, 0xFC6C70D7L, |
6394 | 0xE22B20D2L, 0xE6EA3D65L, 0xEBA91BBCL, 0xEF68060BL, |
6395 | 0xD727BBB6L, 0xD3E6A601L, 0xDEA580D8L, 0xDA649D6FL, |
6396 | 0xC423CD6AL, 0xC0E2D0DDL, 0xCDA1F604L, 0xC960EBB3L, |
6397 | 0xBD3E8D7EL, 0xB9FF90C9L, 0xB4BCB610L, 0xB07DABA7L, |
6398 | 0xAE3AFBA2L, 0xAAFBE615L, 0xA7B8C0CCL, 0xA379DD7BL, |
6399 | 0x9B3660C6L, 0x9FF77D71L, 0x92B45BA8L, 0x9675461FL, |
6400 | 0x8832161AL, 0x8CF30BADL, 0x81B02D74L, 0x857130C3L, |
6401 | 0x5D8A9099L, 0x594B8D2EL, 0x5408ABF7L, 0x50C9B640L, |
6402 | 0x4E8EE645L, 0x4A4FFBF2L, 0x470CDD2BL, 0x43CDC09CL, |
6403 | 0x7B827D21L, 0x7F436096L, 0x7200464FL, 0x76C15BF8L, |
6404 | 0x68860BFDL, 0x6C47164AL, 0x61043093L, 0x65C52D24L, |
6405 | 0x119B4BE9L, 0x155A565EL, 0x18197087L, 0x1CD86D30L, |
6406 | 0x029F3D35L, 0x065E2082L, 0x0B1D065BL, 0x0FDC1BECL, |
6407 | 0x3793A651L, 0x3352BBE6L, 0x3E119D3FL, 0x3AD08088L, |
6408 | 0x2497D08DL, 0x2056CD3AL, 0x2D15EBE3L, 0x29D4F654L, |
6409 | 0xC5A92679L, 0xC1683BCEL, 0xCC2B1D17L, 0xC8EA00A0L, |
6410 | 0xD6AD50A5L, 0xD26C4D12L, 0xDF2F6BCBL, 0xDBEE767CL, |
6411 | 0xE3A1CBC1L, 0xE760D676L, 0xEA23F0AFL, 0xEEE2ED18L, |
6412 | 0xF0A5BD1DL, 0xF464A0AAL, 0xF9278673L, 0xFDE69BC4L, |
6413 | 0x89B8FD09L, 0x8D79E0BEL, 0x803AC667L, 0x84FBDBD0L, |
6414 | 0x9ABC8BD5L, 0x9E7D9662L, 0x933EB0BBL, 0x97FFAD0CL, |
6415 | 0xAFB010B1L, 0xAB710D06L, 0xA6322BDFL, 0xA2F33668L, |
6416 | 0xBCB4666DL, 0xB8757BDAL, 0xB5365D03L, 0xB1F740B4L |
6417 | }; |
6418 | #endif |
6419 | |
6420 | static DRFLAC_INLINE drflac_uint32 drflac_crc32_byte(drflac_uint32 crc32, drflac_uint8 data) |
6421 | { |
6422 | #ifndef DR_FLAC_NO_CRC |
6423 | return (crc32 << 8) ^ drflac__crc32_table[(drflac_uint8)((crc32 >> 24) & 0xFF) ^ data]; |
6424 | #else |
6425 | (void)data; |
6426 | return crc32; |
6427 | #endif |
6428 | } |
6429 | |
2ff0b512 |
6430 | static DRFLAC_INLINE drflac_uint32 drflac_crc32_buffer(drflac_uint32 crc32, drflac_uint8* pData, drflac_uint32 dataSize) |
6431 | { |
6432 | /* This can be optimized. */ |
6433 | drflac_uint32 i; |
6434 | for (i = 0; i < dataSize; ++i) { |
6435 | crc32 = drflac_crc32_byte(crc32, pData[i]); |
6436 | } |
6437 | return crc32; |
6438 | } |
6439 | |
6440 | |
6441 | static DRFLAC_INLINE drflac_bool32 drflac_ogg__is_capture_pattern(drflac_uint8 pattern[4]) |
6442 | { |
6443 | return pattern[0] == 'O' && pattern[1] == 'g' && pattern[2] == 'g' && pattern[3] == 'S'; |
6444 | } |
6445 | |
6446 | static DRFLAC_INLINE drflac_uint32 drflac_ogg__get_page_header_size(drflac_ogg_page_header* pHeader) |
6447 | { |
6448 | return 27 + pHeader->segmentCount; |
6449 | } |
6450 | |
6451 | static DRFLAC_INLINE drflac_uint32 drflac_ogg__get_page_body_size(drflac_ogg_page_header* pHeader) |
6452 | { |
6453 | drflac_uint32 pageBodySize = 0; |
6454 | int i; |
6455 | |
6456 | for (i = 0; i < pHeader->segmentCount; ++i) { |
6457 | pageBodySize += pHeader->segmentTable[i]; |
6458 | } |
6459 | |
6460 | return pageBodySize; |
6461 | } |
6462 | |
6463 | 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) |
6464 | { |
6465 | drflac_uint8 data[23]; |
6466 | drflac_uint32 i; |
6467 | |
6468 | DRFLAC_ASSERT(*pCRC32 == DRFLAC_OGG_CAPTURE_PATTERN_CRC32); |
6469 | |
6470 | if (onRead(pUserData, data, 23) != 23) { |
6471 | return DRFLAC_AT_END; |
6472 | } |
6473 | *pBytesRead += 23; |
6474 | |
6475 | /* |
6476 | It's not actually used, but set the capture pattern to 'OggS' for completeness. Not doing this will cause static analysers to complain about |
6477 | us trying to access uninitialized data. We could alternatively just comment out this member of the drflac_ogg_page_header structure, but I |
6478 | like to have it map to the structure of the underlying data. |
6479 | */ |
6480 | pHeader->capturePattern[0] = 'O'; |
6481 | pHeader->capturePattern[1] = 'g'; |
6482 | pHeader->capturePattern[2] = 'g'; |
6483 | pHeader->capturePattern[3] = 'S'; |
6484 | |
6485 | pHeader->structureVersion = data[0]; |
6486 | pHeader->headerType = data[1]; |
6487 | DRFLAC_COPY_MEMORY(&pHeader->granulePosition, &data[ 2], 8); |
6488 | DRFLAC_COPY_MEMORY(&pHeader->serialNumber, &data[10], 4); |
6489 | DRFLAC_COPY_MEMORY(&pHeader->sequenceNumber, &data[14], 4); |
6490 | DRFLAC_COPY_MEMORY(&pHeader->checksum, &data[18], 4); |
6491 | pHeader->segmentCount = data[22]; |
6492 | |
6493 | /* Calculate the CRC. Note that for the calculation the checksum part of the page needs to be set to 0. */ |
6494 | data[18] = 0; |
6495 | data[19] = 0; |
6496 | data[20] = 0; |
6497 | data[21] = 0; |
6498 | |
6499 | for (i = 0; i < 23; ++i) { |
6500 | *pCRC32 = drflac_crc32_byte(*pCRC32, data[i]); |
6501 | } |
6502 | |
6503 | |
6504 | if (onRead(pUserData, pHeader->segmentTable, pHeader->segmentCount) != pHeader->segmentCount) { |
6505 | return DRFLAC_AT_END; |
6506 | } |
6507 | *pBytesRead += pHeader->segmentCount; |
6508 | |
6509 | for (i = 0; i < pHeader->segmentCount; ++i) { |
6510 | *pCRC32 = drflac_crc32_byte(*pCRC32, pHeader->segmentTable[i]); |
6511 | } |
6512 | |
6513 | return DRFLAC_SUCCESS; |
6514 | } |
6515 | |
6516 | 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) |
6517 | { |
6518 | drflac_uint8 id[4]; |
6519 | |
6520 | *pBytesRead = 0; |
6521 | |
6522 | if (onRead(pUserData, id, 4) != 4) { |
6523 | return DRFLAC_AT_END; |
6524 | } |
6525 | *pBytesRead += 4; |
6526 | |
6527 | /* We need to read byte-by-byte until we find the OggS capture pattern. */ |
6528 | for (;;) { |
6529 | if (drflac_ogg__is_capture_pattern(id)) { |
6530 | drflac_result result; |
6531 | |
6532 | *pCRC32 = DRFLAC_OGG_CAPTURE_PATTERN_CRC32; |
6533 | |
6534 | result = drflac_ogg__read_page_header_after_capture_pattern(onRead, pUserData, pHeader, pBytesRead, pCRC32); |
6535 | if (result == DRFLAC_SUCCESS) { |
6536 | return DRFLAC_SUCCESS; |
6537 | } else { |
6538 | if (result == DRFLAC_CRC_MISMATCH) { |
6539 | continue; |
6540 | } else { |
6541 | return result; |
6542 | } |
6543 | } |
6544 | } else { |
6545 | /* The first 4 bytes did not equal the capture pattern. Read the next byte and try again. */ |
6546 | id[0] = id[1]; |
6547 | id[1] = id[2]; |
6548 | id[2] = id[3]; |
6549 | if (onRead(pUserData, &id[3], 1) != 1) { |
6550 | return DRFLAC_AT_END; |
6551 | } |
6552 | *pBytesRead += 1; |
6553 | } |
6554 | } |
6555 | } |
6556 | |
6557 | |
6558 | /* |
6559 | The main part of the Ogg encapsulation is the conversion from the physical Ogg bitstream to the native FLAC bitstream. It works |
6560 | in three general stages: Ogg Physical Bitstream -> Ogg/FLAC Logical Bitstream -> FLAC Native Bitstream. dr_flac is designed |
6561 | in such a way that the core sections assume everything is delivered in native format. Therefore, for each encapsulation type |
6562 | 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 |
6563 | the physical Ogg bitstream are converted and delivered in native FLAC format. |
6564 | */ |
6565 | typedef struct |
6566 | { |
6567 | drflac_read_proc onRead; /* The original onRead callback from drflac_open() and family. */ |
6568 | drflac_seek_proc onSeek; /* The original onSeek callback from drflac_open() and family. */ |
6569 | void* pUserData; /* The user data passed on onRead and onSeek. This is the user data that was passed on drflac_open() and family. */ |
6570 | drflac_uint64 currentBytePos; /* The position of the byte we are sitting on in the physical byte stream. Used for efficient seeking. */ |
6571 | 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. */ |
6572 | drflac_uint32 serialNumber; /* The serial number of the FLAC audio pages. This is determined by the initial header page that was read during initialization. */ |
6573 | drflac_ogg_page_header bosPageHeader; /* Used for seeking. */ |
6574 | drflac_ogg_page_header currentPageHeader; |
6575 | drflac_uint32 bytesRemainingInPage; |
6576 | drflac_uint32 pageDataSize; |
6577 | drflac_uint8 pageData[DRFLAC_OGG_MAX_PAGE_SIZE]; |
6578 | } drflac_oggbs; /* oggbs = Ogg Bitstream */ |
6579 | |
6580 | static size_t drflac_oggbs__read_physical(drflac_oggbs* oggbs, void* bufferOut, size_t bytesToRead) |
6581 | { |
6582 | size_t bytesActuallyRead = oggbs->onRead(oggbs->pUserData, bufferOut, bytesToRead); |
6583 | oggbs->currentBytePos += bytesActuallyRead; |
6584 | |
6585 | return bytesActuallyRead; |
6586 | } |
6587 | |
6588 | static drflac_bool32 drflac_oggbs__seek_physical(drflac_oggbs* oggbs, drflac_uint64 offset, drflac_seek_origin origin) |
6589 | { |
6590 | if (origin == drflac_seek_origin_start) { |
6591 | if (offset <= 0x7FFFFFFF) { |
6592 | if (!oggbs->onSeek(oggbs->pUserData, (int)offset, drflac_seek_origin_start)) { |
6593 | return DRFLAC_FALSE; |
6594 | } |
6595 | oggbs->currentBytePos = offset; |
6596 | |
6597 | return DRFLAC_TRUE; |
6598 | } else { |
6599 | if (!oggbs->onSeek(oggbs->pUserData, 0x7FFFFFFF, drflac_seek_origin_start)) { |
6600 | return DRFLAC_FALSE; |
6601 | } |
6602 | oggbs->currentBytePos = offset; |
6603 | |
6604 | return drflac_oggbs__seek_physical(oggbs, offset - 0x7FFFFFFF, drflac_seek_origin_current); |
6605 | } |
6606 | } else { |
6607 | while (offset > 0x7FFFFFFF) { |
6608 | if (!oggbs->onSeek(oggbs->pUserData, 0x7FFFFFFF, drflac_seek_origin_current)) { |
6609 | return DRFLAC_FALSE; |
6610 | } |
6611 | oggbs->currentBytePos += 0x7FFFFFFF; |
6612 | offset -= 0x7FFFFFFF; |
6613 | } |
6614 | |
6615 | if (!oggbs->onSeek(oggbs->pUserData, (int)offset, drflac_seek_origin_current)) { /* <-- Safe cast thanks to the loop above. */ |
6616 | return DRFLAC_FALSE; |
6617 | } |
6618 | oggbs->currentBytePos += offset; |
6619 | |
6620 | return DRFLAC_TRUE; |
6621 | } |
6622 | } |
6623 | |
6624 | static drflac_bool32 drflac_oggbs__goto_next_page(drflac_oggbs* oggbs, drflac_ogg_crc_mismatch_recovery recoveryMethod) |
6625 | { |
6626 | drflac_ogg_page_header header; |
6627 | for (;;) { |
6628 | drflac_uint32 crc32 = 0; |
6629 | drflac_uint32 bytesRead; |
6630 | drflac_uint32 pageBodySize; |
6631 | #ifndef DR_FLAC_NO_CRC |
6632 | drflac_uint32 actualCRC32; |
6633 | #endif |
6634 | |
6635 | if (drflac_ogg__read_page_header(oggbs->onRead, oggbs->pUserData, &header, &bytesRead, &crc32) != DRFLAC_SUCCESS) { |
6636 | return DRFLAC_FALSE; |
6637 | } |
6638 | oggbs->currentBytePos += bytesRead; |
6639 | |
6640 | pageBodySize = drflac_ogg__get_page_body_size(&header); |
6641 | if (pageBodySize > DRFLAC_OGG_MAX_PAGE_SIZE) { |
6642 | continue; /* Invalid page size. Assume it's corrupted and just move to the next page. */ |
6643 | } |
6644 | |
6645 | if (header.serialNumber != oggbs->serialNumber) { |
6646 | /* It's not a FLAC page. Skip it. */ |
6647 | if (pageBodySize > 0 && !drflac_oggbs__seek_physical(oggbs, pageBodySize, drflac_seek_origin_current)) { |
6648 | return DRFLAC_FALSE; |
6649 | } |
6650 | continue; |
6651 | } |
6652 | |
6653 | |
6654 | /* 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. */ |
6655 | if (drflac_oggbs__read_physical(oggbs, oggbs->pageData, pageBodySize) != pageBodySize) { |
6656 | return DRFLAC_FALSE; |
6657 | } |
6658 | oggbs->pageDataSize = pageBodySize; |
6659 | |
6660 | #ifndef DR_FLAC_NO_CRC |
6661 | actualCRC32 = drflac_crc32_buffer(crc32, oggbs->pageData, oggbs->pageDataSize); |
6662 | if (actualCRC32 != header.checksum) { |
6663 | if (recoveryMethod == drflac_ogg_recover_on_crc_mismatch) { |
6664 | continue; /* CRC mismatch. Skip this page. */ |
6665 | } else { |
6666 | /* |
6667 | Even though we are failing on a CRC mismatch, we still want our stream to be in a good state. Therefore we |
6668 | go to the next valid page to ensure we're in a good state, but return false to let the caller know that the |
6669 | seek did not fully complete. |
6670 | */ |
6671 | drflac_oggbs__goto_next_page(oggbs, drflac_ogg_recover_on_crc_mismatch); |
6672 | return DRFLAC_FALSE; |
6673 | } |
6674 | } |
6675 | #else |
6676 | (void)recoveryMethod; /* <-- Silence a warning. */ |
6677 | #endif |
6678 | |
6679 | oggbs->currentPageHeader = header; |
6680 | oggbs->bytesRemainingInPage = pageBodySize; |
6681 | return DRFLAC_TRUE; |
6682 | } |
6683 | } |
6684 | |
2ff0b512 |
6685 | static size_t drflac__on_read_ogg(void* pUserData, void* bufferOut, size_t bytesToRead) |
6686 | { |
6687 | drflac_oggbs* oggbs = (drflac_oggbs*)pUserData; |
6688 | drflac_uint8* pRunningBufferOut = (drflac_uint8*)bufferOut; |
6689 | size_t bytesRead = 0; |
6690 | |
6691 | DRFLAC_ASSERT(oggbs != NULL); |
6692 | DRFLAC_ASSERT(pRunningBufferOut != NULL); |
6693 | |
6694 | /* Reading is done page-by-page. If we've run out of bytes in the page we need to move to the next one. */ |
6695 | while (bytesRead < bytesToRead) { |
6696 | size_t bytesRemainingToRead = bytesToRead - bytesRead; |
6697 | |
6698 | if (oggbs->bytesRemainingInPage >= bytesRemainingToRead) { |
6699 | DRFLAC_COPY_MEMORY(pRunningBufferOut, oggbs->pageData + (oggbs->pageDataSize - oggbs->bytesRemainingInPage), bytesRemainingToRead); |
6700 | bytesRead += bytesRemainingToRead; |
6701 | oggbs->bytesRemainingInPage -= (drflac_uint32)bytesRemainingToRead; |
6702 | break; |
6703 | } |
6704 | |
6705 | /* If we get here it means some of the requested data is contained in the next pages. */ |
6706 | if (oggbs->bytesRemainingInPage > 0) { |
6707 | DRFLAC_COPY_MEMORY(pRunningBufferOut, oggbs->pageData + (oggbs->pageDataSize - oggbs->bytesRemainingInPage), oggbs->bytesRemainingInPage); |
6708 | bytesRead += oggbs->bytesRemainingInPage; |
6709 | pRunningBufferOut += oggbs->bytesRemainingInPage; |
6710 | oggbs->bytesRemainingInPage = 0; |
6711 | } |
6712 | |
6713 | DRFLAC_ASSERT(bytesRemainingToRead > 0); |
6714 | if (!drflac_oggbs__goto_next_page(oggbs, drflac_ogg_recover_on_crc_mismatch)) { |
6715 | break; /* Failed to go to the next page. Might have simply hit the end of the stream. */ |
6716 | } |
6717 | } |
6718 | |
6719 | return bytesRead; |
6720 | } |
6721 | |
6722 | static drflac_bool32 drflac__on_seek_ogg(void* pUserData, int offset, drflac_seek_origin origin) |
6723 | { |
6724 | drflac_oggbs* oggbs = (drflac_oggbs*)pUserData; |
6725 | int bytesSeeked = 0; |
6726 | |
6727 | DRFLAC_ASSERT(oggbs != NULL); |
6728 | DRFLAC_ASSERT(offset >= 0); /* <-- Never seek backwards. */ |
6729 | |
6730 | /* Seeking is always forward which makes things a lot simpler. */ |
6731 | if (origin == drflac_seek_origin_start) { |
6732 | if (!drflac_oggbs__seek_physical(oggbs, (int)oggbs->firstBytePos, drflac_seek_origin_start)) { |
6733 | return DRFLAC_FALSE; |
6734 | } |
6735 | |
6736 | if (!drflac_oggbs__goto_next_page(oggbs, drflac_ogg_fail_on_crc_mismatch)) { |
6737 | return DRFLAC_FALSE; |
6738 | } |
6739 | |
6740 | return drflac__on_seek_ogg(pUserData, offset, drflac_seek_origin_current); |
6741 | } |
6742 | |
6743 | DRFLAC_ASSERT(origin == drflac_seek_origin_current); |
6744 | |
6745 | while (bytesSeeked < offset) { |
6746 | int bytesRemainingToSeek = offset - bytesSeeked; |
6747 | DRFLAC_ASSERT(bytesRemainingToSeek >= 0); |
6748 | |
6749 | if (oggbs->bytesRemainingInPage >= (size_t)bytesRemainingToSeek) { |
6750 | bytesSeeked += bytesRemainingToSeek; |
6751 | (void)bytesSeeked; /* <-- Silence a dead store warning emitted by Clang Static Analyzer. */ |
6752 | oggbs->bytesRemainingInPage -= bytesRemainingToSeek; |
6753 | break; |
6754 | } |
6755 | |
6756 | /* If we get here it means some of the requested data is contained in the next pages. */ |
6757 | if (oggbs->bytesRemainingInPage > 0) { |
6758 | bytesSeeked += (int)oggbs->bytesRemainingInPage; |
6759 | oggbs->bytesRemainingInPage = 0; |
6760 | } |
6761 | |
6762 | DRFLAC_ASSERT(bytesRemainingToSeek > 0); |
6763 | if (!drflac_oggbs__goto_next_page(oggbs, drflac_ogg_fail_on_crc_mismatch)) { |
6764 | /* Failed to go to the next page. We either hit the end of the stream or had a CRC mismatch. */ |
6765 | return DRFLAC_FALSE; |
6766 | } |
6767 | } |
6768 | |
6769 | return DRFLAC_TRUE; |
6770 | } |
6771 | |
6772 | |
6773 | static drflac_bool32 drflac_ogg__seek_to_pcm_frame(drflac* pFlac, drflac_uint64 pcmFrameIndex) |
6774 | { |
6775 | drflac_oggbs* oggbs = (drflac_oggbs*)pFlac->_oggbs; |
6776 | drflac_uint64 originalBytePos; |
6777 | drflac_uint64 runningGranulePosition; |
6778 | drflac_uint64 runningFrameBytePos; |
6779 | drflac_uint64 runningPCMFrameCount; |
6780 | |
6781 | DRFLAC_ASSERT(oggbs != NULL); |
6782 | |
6783 | originalBytePos = oggbs->currentBytePos; /* For recovery. Points to the OggS identifier. */ |
6784 | |
6785 | /* First seek to the first frame. */ |
6786 | if (!drflac__seek_to_byte(&pFlac->bs, pFlac->firstFLACFramePosInBytes)) { |
6787 | return DRFLAC_FALSE; |
6788 | } |
6789 | oggbs->bytesRemainingInPage = 0; |
6790 | |
6791 | runningGranulePosition = 0; |
6792 | for (;;) { |
6793 | if (!drflac_oggbs__goto_next_page(oggbs, drflac_ogg_recover_on_crc_mismatch)) { |
6794 | drflac_oggbs__seek_physical(oggbs, originalBytePos, drflac_seek_origin_start); |
6795 | return DRFLAC_FALSE; /* Never did find that sample... */ |
6796 | } |
6797 | |
6798 | runningFrameBytePos = oggbs->currentBytePos - drflac_ogg__get_page_header_size(&oggbs->currentPageHeader) - oggbs->pageDataSize; |
6799 | if (oggbs->currentPageHeader.granulePosition >= pcmFrameIndex) { |
6800 | break; /* The sample is somewhere in the previous page. */ |
6801 | } |
6802 | |
6803 | /* |
6804 | At this point we know the sample is not in the previous page. It could possibly be in this page. For simplicity we |
6805 | disregard any pages that do not begin a fresh packet. |
6806 | */ |
6807 | if ((oggbs->currentPageHeader.headerType & 0x01) == 0) { /* <-- Is it a fresh page? */ |
6808 | if (oggbs->currentPageHeader.segmentTable[0] >= 2) { |
6809 | drflac_uint8 firstBytesInPage[2]; |
6810 | firstBytesInPage[0] = oggbs->pageData[0]; |
6811 | firstBytesInPage[1] = oggbs->pageData[1]; |
6812 | |
6813 | if ((firstBytesInPage[0] == 0xFF) && (firstBytesInPage[1] & 0xFC) == 0xF8) { /* <-- Does the page begin with a frame's sync code? */ |
6814 | runningGranulePosition = oggbs->currentPageHeader.granulePosition; |
6815 | } |
6816 | |
6817 | continue; |
6818 | } |
6819 | } |
6820 | } |
6821 | |
6822 | /* |
6823 | 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 |
6824 | 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 |
6825 | a new frame. This property means that after we've seeked to the page we can immediately start looping over frames until |
6826 | we find the one containing the target sample. |
6827 | */ |
6828 | if (!drflac_oggbs__seek_physical(oggbs, runningFrameBytePos, drflac_seek_origin_start)) { |
6829 | return DRFLAC_FALSE; |
6830 | } |
6831 | if (!drflac_oggbs__goto_next_page(oggbs, drflac_ogg_recover_on_crc_mismatch)) { |
6832 | return DRFLAC_FALSE; |
6833 | } |
6834 | |
6835 | /* |
6836 | 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 |
6837 | looping over these frames until we find the one containing the sample we're after. |
6838 | */ |
6839 | runningPCMFrameCount = runningGranulePosition; |
6840 | for (;;) { |
6841 | /* |
6842 | There are two ways to find the sample and seek past irrelevant frames: |
6843 | 1) Use the native FLAC decoder. |
6844 | 2) Use Ogg's framing system. |
6845 | |
6846 | Both of these options have their own pros and cons. Using the native FLAC decoder is slower because it needs to |
6847 | do a full decode of the frame. Using Ogg's framing system is faster, but more complicated and involves some code |
6848 | duplication for the decoding of frame headers. |
6849 | |
6850 | Another thing to consider is that using the Ogg framing system will perform direct seeking of the physical Ogg |
6851 | bitstream. This is important to consider because it means we cannot read data from the drflac_bs object using the |
6852 | standard drflac__*() APIs because that will read in extra data for its own internal caching which in turn breaks |
6853 | the positioning of the read pointer of the physical Ogg bitstream. Therefore, anything that would normally be read |
6854 | using the native FLAC decoding APIs, such as drflac__read_next_flac_frame_header(), need to be re-implemented so as to |
6855 | avoid the use of the drflac_bs object. |
6856 | |
6857 | Considering these issues, I have decided to use the slower native FLAC decoding method for the following reasons: |
6858 | 1) Seeking is already partially accelerated using Ogg's paging system in the code block above. |
6859 | 2) Seeking in an Ogg encapsulated FLAC stream is probably quite uncommon. |
6860 | 3) Simplicity. |
6861 | */ |
6862 | drflac_uint64 firstPCMFrameInFLACFrame = 0; |
6863 | drflac_uint64 lastPCMFrameInFLACFrame = 0; |
6864 | drflac_uint64 pcmFrameCountInThisFrame; |
6865 | |
6866 | if (!drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFLACFrame.header)) { |
6867 | return DRFLAC_FALSE; |
6868 | } |
6869 | |
6870 | drflac__get_pcm_frame_range_of_current_flac_frame(pFlac, &firstPCMFrameInFLACFrame, &lastPCMFrameInFLACFrame); |
6871 | |
6872 | pcmFrameCountInThisFrame = (lastPCMFrameInFLACFrame - firstPCMFrameInFLACFrame) + 1; |
6873 | |
6874 | /* If we are seeking to the end of the file and we've just hit it, we're done. */ |
6875 | if (pcmFrameIndex == pFlac->totalPCMFrameCount && (runningPCMFrameCount + pcmFrameCountInThisFrame) == pFlac->totalPCMFrameCount) { |
6876 | drflac_result result = drflac__decode_flac_frame(pFlac); |
6877 | if (result == DRFLAC_SUCCESS) { |
6878 | pFlac->currentPCMFrame = pcmFrameIndex; |
6879 | pFlac->currentFLACFrame.pcmFramesRemaining = 0; |
6880 | return DRFLAC_TRUE; |
6881 | } else { |
6882 | return DRFLAC_FALSE; |
6883 | } |
6884 | } |
6885 | |
6886 | if (pcmFrameIndex < (runningPCMFrameCount + pcmFrameCountInThisFrame)) { |
6887 | /* |
6888 | 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 |
6889 | it never existed and keep iterating. |
6890 | */ |
6891 | drflac_result result = drflac__decode_flac_frame(pFlac); |
6892 | if (result == DRFLAC_SUCCESS) { |
6893 | /* The frame is valid. We just need to skip over some samples to ensure it's sample-exact. */ |
6894 | drflac_uint64 pcmFramesToDecode = (size_t)(pcmFrameIndex - runningPCMFrameCount); /* <-- Safe cast because the maximum number of samples in a frame is 65535. */ |
6895 | if (pcmFramesToDecode == 0) { |
6896 | return DRFLAC_TRUE; |
6897 | } |
6898 | |
6899 | pFlac->currentPCMFrame = runningPCMFrameCount; |
6900 | |
6901 | return drflac__seek_forward_by_pcm_frames(pFlac, pcmFramesToDecode) == pcmFramesToDecode; /* <-- If this fails, something bad has happened (it should never fail). */ |
6902 | } else { |
6903 | if (result == DRFLAC_CRC_MISMATCH) { |
6904 | continue; /* CRC mismatch. Pretend this frame never existed. */ |
6905 | } else { |
6906 | return DRFLAC_FALSE; |
6907 | } |
6908 | } |
6909 | } else { |
6910 | /* |
6911 | 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 |
6912 | frame never existed and leave the running sample count untouched. |
6913 | */ |
6914 | drflac_result result = drflac__seek_to_next_flac_frame(pFlac); |
6915 | if (result == DRFLAC_SUCCESS) { |
6916 | runningPCMFrameCount += pcmFrameCountInThisFrame; |
6917 | } else { |
6918 | if (result == DRFLAC_CRC_MISMATCH) { |
6919 | continue; /* CRC mismatch. Pretend this frame never existed. */ |
6920 | } else { |
6921 | return DRFLAC_FALSE; |
6922 | } |
6923 | } |
6924 | } |
6925 | } |
6926 | } |
6927 | |
6928 | |
6929 | |
6930 | 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) |
6931 | { |
6932 | drflac_ogg_page_header header; |
6933 | drflac_uint32 crc32 = DRFLAC_OGG_CAPTURE_PATTERN_CRC32; |
6934 | drflac_uint32 bytesRead = 0; |
6935 | |
6936 | /* Pre Condition: The bit stream should be sitting just past the 4-byte OggS capture pattern. */ |
6937 | (void)relaxed; |
6938 | |
6939 | pInit->container = drflac_container_ogg; |
6940 | pInit->oggFirstBytePos = 0; |
6941 | |
6942 | /* |
6943 | We'll get here if the first 4 bytes of the stream were the OggS capture pattern, however it doesn't necessarily mean the |
6944 | stream includes FLAC encoded audio. To check for this we need to scan the beginning-of-stream page markers and check if |
6945 | any match the FLAC specification. Important to keep in mind that the stream may be multiplexed. |
6946 | */ |
6947 | if (drflac_ogg__read_page_header_after_capture_pattern(onRead, pUserData, &header, &bytesRead, &crc32) != DRFLAC_SUCCESS) { |
6948 | return DRFLAC_FALSE; |
6949 | } |
6950 | pInit->runningFilePos += bytesRead; |
6951 | |
6952 | for (;;) { |
6953 | int pageBodySize; |
6954 | |
6955 | /* Break if we're past the beginning of stream page. */ |
6956 | if ((header.headerType & 0x02) == 0) { |
6957 | return DRFLAC_FALSE; |
6958 | } |
6959 | |
6960 | /* Check if it's a FLAC header. */ |
6961 | pageBodySize = drflac_ogg__get_page_body_size(&header); |
6962 | if (pageBodySize == 51) { /* 51 = the lacing value of the FLAC header packet. */ |
6963 | /* It could be a FLAC page... */ |
6964 | drflac_uint32 bytesRemainingInPage = pageBodySize; |
6965 | drflac_uint8 packetType; |
6966 | |
6967 | if (onRead(pUserData, &packetType, 1) != 1) { |
6968 | return DRFLAC_FALSE; |
6969 | } |
6970 | |
6971 | bytesRemainingInPage -= 1; |
6972 | if (packetType == 0x7F) { |
6973 | /* Increasingly more likely to be a FLAC page... */ |
6974 | drflac_uint8 sig[4]; |
6975 | if (onRead(pUserData, sig, 4) != 4) { |
6976 | return DRFLAC_FALSE; |
6977 | } |
6978 | |
6979 | bytesRemainingInPage -= 4; |
6980 | if (sig[0] == 'F' && sig[1] == 'L' && sig[2] == 'A' && sig[3] == 'C') { |
6981 | /* Almost certainly a FLAC page... */ |
6982 | drflac_uint8 mappingVersion[2]; |
6983 | if (onRead(pUserData, mappingVersion, 2) != 2) { |
6984 | return DRFLAC_FALSE; |
6985 | } |
6986 | |
6987 | if (mappingVersion[0] != 1) { |
6988 | return DRFLAC_FALSE; /* Only supporting version 1.x of the Ogg mapping. */ |
6989 | } |
6990 | |
6991 | /* |
6992 | The next 2 bytes are the non-audio packets, not including this one. We don't care about this because we're going to |
6993 | be handling it in a generic way based on the serial number and packet types. |
6994 | */ |
6995 | if (!onSeek(pUserData, 2, drflac_seek_origin_current)) { |
6996 | return DRFLAC_FALSE; |
6997 | } |
6998 | |
6999 | /* Expecting the native FLAC signature "fLaC". */ |
7000 | if (onRead(pUserData, sig, 4) != 4) { |
7001 | return DRFLAC_FALSE; |
7002 | } |
7003 | |
7004 | if (sig[0] == 'f' && sig[1] == 'L' && sig[2] == 'a' && sig[3] == 'C') { |
7005 | /* The remaining data in the page should be the STREAMINFO block. */ |
7006 | drflac_streaminfo streaminfo; |
7007 | drflac_uint8 isLastBlock; |
7008 | drflac_uint8 blockType; |
7009 | drflac_uint32 blockSize; |
7010 | if (!drflac__read_and_decode_block_header(onRead, pUserData, &isLastBlock, &blockType, &blockSize)) { |
7011 | return DRFLAC_FALSE; |
7012 | } |
7013 | |
7014 | if (blockType != DRFLAC_METADATA_BLOCK_TYPE_STREAMINFO || blockSize != 34) { |
7015 | return DRFLAC_FALSE; /* Invalid block type. First block must be the STREAMINFO block. */ |
7016 | } |
7017 | |
7018 | if (drflac__read_streaminfo(onRead, pUserData, &streaminfo)) { |
7019 | /* Success! */ |
7020 | pInit->hasStreamInfoBlock = DRFLAC_TRUE; |
7021 | pInit->sampleRate = streaminfo.sampleRate; |
7022 | pInit->channels = streaminfo.channels; |
7023 | pInit->bitsPerSample = streaminfo.bitsPerSample; |
7024 | pInit->totalPCMFrameCount = streaminfo.totalPCMFrameCount; |
7025 | pInit->maxBlockSizeInPCMFrames = streaminfo.maxBlockSizeInPCMFrames; |
7026 | pInit->hasMetadataBlocks = !isLastBlock; |
7027 | |
7028 | if (onMeta) { |
7029 | drflac_metadata metadata; |
7030 | metadata.type = DRFLAC_METADATA_BLOCK_TYPE_STREAMINFO; |
7031 | metadata.pRawData = NULL; |
7032 | metadata.rawDataSize = 0; |
7033 | metadata.data.streaminfo = streaminfo; |
7034 | onMeta(pUserDataMD, &metadata); |
7035 | } |
7036 | |
7037 | pInit->runningFilePos += pageBodySize; |
7038 | pInit->oggFirstBytePos = pInit->runningFilePos - 79; /* Subtracting 79 will place us right on top of the "OggS" identifier of the FLAC bos page. */ |
7039 | pInit->oggSerial = header.serialNumber; |
7040 | pInit->oggBosHeader = header; |
7041 | break; |
7042 | } else { |
7043 | /* Failed to read STREAMINFO block. Aww, so close... */ |
7044 | return DRFLAC_FALSE; |
7045 | } |
7046 | } else { |
7047 | /* Invalid file. */ |
7048 | return DRFLAC_FALSE; |
7049 | } |
7050 | } else { |
7051 | /* Not a FLAC header. Skip it. */ |
7052 | if (!onSeek(pUserData, bytesRemainingInPage, drflac_seek_origin_current)) { |
7053 | return DRFLAC_FALSE; |
7054 | } |
7055 | } |
7056 | } else { |
7057 | /* Not a FLAC header. Seek past the entire page and move on to the next. */ |
7058 | if (!onSeek(pUserData, bytesRemainingInPage, drflac_seek_origin_current)) { |
7059 | return DRFLAC_FALSE; |
7060 | } |
7061 | } |
7062 | } else { |
7063 | if (!onSeek(pUserData, pageBodySize, drflac_seek_origin_current)) { |
7064 | return DRFLAC_FALSE; |
7065 | } |
7066 | } |
7067 | |
7068 | pInit->runningFilePos += pageBodySize; |
7069 | |
7070 | |
7071 | /* Read the header of the next page. */ |
7072 | if (drflac_ogg__read_page_header(onRead, pUserData, &header, &bytesRead, &crc32) != DRFLAC_SUCCESS) { |
7073 | return DRFLAC_FALSE; |
7074 | } |
7075 | pInit->runningFilePos += bytesRead; |
7076 | } |
7077 | |
7078 | /* |
7079 | 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 |
7080 | 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 |
7081 | Ogg bistream object. |
7082 | */ |
7083 | pInit->hasMetadataBlocks = DRFLAC_TRUE; /* <-- Always have at least VORBIS_COMMENT metadata block. */ |
7084 | return DRFLAC_TRUE; |
7085 | } |
7086 | #endif |
7087 | |
7088 | 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) |
7089 | { |
7090 | drflac_bool32 relaxed; |
7091 | drflac_uint8 id[4]; |
7092 | |
7093 | if (pInit == NULL || onRead == NULL || onSeek == NULL) { |
7094 | return DRFLAC_FALSE; |
7095 | } |
7096 | |
7097 | DRFLAC_ZERO_MEMORY(pInit, sizeof(*pInit)); |
7098 | pInit->onRead = onRead; |
7099 | pInit->onSeek = onSeek; |
7100 | pInit->onMeta = onMeta; |
7101 | pInit->container = container; |
7102 | pInit->pUserData = pUserData; |
7103 | pInit->pUserDataMD = pUserDataMD; |
7104 | |
7105 | pInit->bs.onRead = onRead; |
7106 | pInit->bs.onSeek = onSeek; |
7107 | pInit->bs.pUserData = pUserData; |
7108 | drflac__reset_cache(&pInit->bs); |
7109 | |
7110 | |
7111 | /* If the container is explicitly defined then we can try opening in relaxed mode. */ |
7112 | relaxed = container != drflac_container_unknown; |
7113 | |
7114 | /* Skip over any ID3 tags. */ |
7115 | for (;;) { |
7116 | if (onRead(pUserData, id, 4) != 4) { |
7117 | return DRFLAC_FALSE; /* Ran out of data. */ |
7118 | } |
7119 | pInit->runningFilePos += 4; |
7120 | |
7121 | if (id[0] == 'I' && id[1] == 'D' && id[2] == '3') { |
7122 | drflac_uint8 header[6]; |
7123 | drflac_uint8 flags; |
7124 | drflac_uint32 headerSize; |
7125 | |
7126 | if (onRead(pUserData, header, 6) != 6) { |
7127 | return DRFLAC_FALSE; /* Ran out of data. */ |
7128 | } |
7129 | pInit->runningFilePos += 6; |
7130 | |
7131 | flags = header[1]; |
7132 | |
7133 | DRFLAC_COPY_MEMORY(&headerSize, header+2, 4); |
7134 | headerSize = drflac__unsynchsafe_32(drflac__be2host_32(headerSize)); |
7135 | if (flags & 0x10) { |
7136 | headerSize += 10; |
7137 | } |
7138 | |
7139 | if (!onSeek(pUserData, headerSize, drflac_seek_origin_current)) { |
7140 | return DRFLAC_FALSE; /* Failed to seek past the tag. */ |
7141 | } |
7142 | pInit->runningFilePos += headerSize; |
7143 | } else { |
7144 | break; |
7145 | } |
7146 | } |
7147 | |
7148 | if (id[0] == 'f' && id[1] == 'L' && id[2] == 'a' && id[3] == 'C') { |
7149 | return drflac__init_private__native(pInit, onRead, onSeek, onMeta, pUserData, pUserDataMD, relaxed); |
7150 | } |
7151 | #ifndef DR_FLAC_NO_OGG |
7152 | if (id[0] == 'O' && id[1] == 'g' && id[2] == 'g' && id[3] == 'S') { |
7153 | return drflac__init_private__ogg(pInit, onRead, onSeek, onMeta, pUserData, pUserDataMD, relaxed); |
7154 | } |
7155 | #endif |
7156 | |
7157 | /* If we get here it means we likely don't have a header. Try opening in relaxed mode, if applicable. */ |
7158 | if (relaxed) { |
7159 | if (container == drflac_container_native) { |
7160 | return drflac__init_private__native(pInit, onRead, onSeek, onMeta, pUserData, pUserDataMD, relaxed); |
7161 | } |
7162 | #ifndef DR_FLAC_NO_OGG |
7163 | if (container == drflac_container_ogg) { |
7164 | return drflac__init_private__ogg(pInit, onRead, onSeek, onMeta, pUserData, pUserDataMD, relaxed); |
7165 | } |
7166 | #endif |
7167 | } |
7168 | |
7169 | /* Unsupported container. */ |
7170 | return DRFLAC_FALSE; |
7171 | } |
7172 | |
7173 | static void drflac__init_from_info(drflac* pFlac, const drflac_init_info* pInit) |
7174 | { |
7175 | DRFLAC_ASSERT(pFlac != NULL); |
7176 | DRFLAC_ASSERT(pInit != NULL); |
7177 | |
7178 | DRFLAC_ZERO_MEMORY(pFlac, sizeof(*pFlac)); |
7179 | pFlac->bs = pInit->bs; |
7180 | pFlac->onMeta = pInit->onMeta; |
7181 | pFlac->pUserDataMD = pInit->pUserDataMD; |
7182 | pFlac->maxBlockSizeInPCMFrames = pInit->maxBlockSizeInPCMFrames; |
7183 | pFlac->sampleRate = pInit->sampleRate; |
7184 | pFlac->channels = (drflac_uint8)pInit->channels; |
7185 | pFlac->bitsPerSample = (drflac_uint8)pInit->bitsPerSample; |
7186 | pFlac->totalPCMFrameCount = pInit->totalPCMFrameCount; |
7187 | pFlac->container = pInit->container; |
7188 | } |
7189 | |
7190 | |
7191 | 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) |
7192 | { |
7193 | drflac_init_info init; |
7194 | drflac_uint32 allocationSize; |
7195 | drflac_uint32 wholeSIMDVectorCountPerChannel; |
7196 | drflac_uint32 decodedSamplesAllocationSize; |
7197 | #ifndef DR_FLAC_NO_OGG |
7198 | drflac_oggbs oggbs; |
7199 | #endif |
7200 | drflac_uint64 firstFramePos; |
7201 | drflac_uint64 seektablePos; |
7202 | drflac_uint32 seektableSize; |
7203 | drflac_allocation_callbacks allocationCallbacks; |
7204 | drflac* pFlac; |
7205 | |
7206 | /* CPU support first. */ |
7207 | drflac__init_cpu_caps(); |
7208 | |
7209 | if (!drflac__init_private(&init, onRead, onSeek, onMeta, container, pUserData, pUserDataMD)) { |
7210 | return NULL; |
7211 | } |
7212 | |
7213 | if (pAllocationCallbacks != NULL) { |
7214 | allocationCallbacks = *pAllocationCallbacks; |
7215 | if (allocationCallbacks.onFree == NULL || (allocationCallbacks.onMalloc == NULL && allocationCallbacks.onRealloc == NULL)) { |
7216 | return NULL; /* Invalid allocation callbacks. */ |
7217 | } |
7218 | } else { |
7219 | allocationCallbacks.pUserData = NULL; |
7220 | allocationCallbacks.onMalloc = drflac__malloc_default; |
7221 | allocationCallbacks.onRealloc = drflac__realloc_default; |
7222 | allocationCallbacks.onFree = drflac__free_default; |
7223 | } |
7224 | |
7225 | |
7226 | /* |
7227 | The size of the allocation for the drflac object needs to be large enough to fit the following: |
7228 | 1) The main members of the drflac structure |
7229 | 2) A block of memory large enough to store the decoded samples of the largest frame in the stream |
7230 | 3) If the container is Ogg, a drflac_oggbs object |
7231 | |
7232 | The complicated part of the allocation is making sure there's enough room the decoded samples, taking into consideration |
7233 | the different SIMD instruction sets. |
7234 | */ |
7235 | allocationSize = sizeof(drflac); |
7236 | |
7237 | /* |
7238 | The allocation size for decoded frames depends on the number of 32-bit integers that fit inside the largest SIMD vector |
7239 | we are supporting. |
7240 | */ |
7241 | if ((init.maxBlockSizeInPCMFrames % (DRFLAC_MAX_SIMD_VECTOR_SIZE / sizeof(drflac_int32))) == 0) { |
7242 | wholeSIMDVectorCountPerChannel = (init.maxBlockSizeInPCMFrames / (DRFLAC_MAX_SIMD_VECTOR_SIZE / sizeof(drflac_int32))); |
7243 | } else { |
7244 | wholeSIMDVectorCountPerChannel = (init.maxBlockSizeInPCMFrames / (DRFLAC_MAX_SIMD_VECTOR_SIZE / sizeof(drflac_int32))) + 1; |
7245 | } |
7246 | |
7247 | decodedSamplesAllocationSize = wholeSIMDVectorCountPerChannel * DRFLAC_MAX_SIMD_VECTOR_SIZE * init.channels; |
7248 | |
7249 | allocationSize += decodedSamplesAllocationSize; |
7250 | allocationSize += DRFLAC_MAX_SIMD_VECTOR_SIZE; /* Allocate extra bytes to ensure we have enough for alignment. */ |
7251 | |
7252 | #ifndef DR_FLAC_NO_OGG |
7253 | /* There's additional data required for Ogg streams. */ |
7254 | if (init.container == drflac_container_ogg) { |
7255 | allocationSize += sizeof(drflac_oggbs); |
7256 | } |
7257 | |
7258 | DRFLAC_ZERO_MEMORY(&oggbs, sizeof(oggbs)); |
7259 | if (init.container == drflac_container_ogg) { |
7260 | oggbs.onRead = onRead; |
7261 | oggbs.onSeek = onSeek; |
7262 | oggbs.pUserData = pUserData; |
7263 | oggbs.currentBytePos = init.oggFirstBytePos; |
7264 | oggbs.firstBytePos = init.oggFirstBytePos; |
7265 | oggbs.serialNumber = init.oggSerial; |
7266 | oggbs.bosPageHeader = init.oggBosHeader; |
7267 | oggbs.bytesRemainingInPage = 0; |
7268 | } |
7269 | #endif |
7270 | |
7271 | /* |
7272 | 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 |
7273 | consist of only a single heap allocation. To this, the size of the seek table needs to be known, which we determine when reading |
7274 | and decoding the metadata. |
7275 | */ |
7276 | firstFramePos = 42; /* <-- We know we are at byte 42 at this point. */ |
7277 | seektablePos = 0; |
7278 | seektableSize = 0; |
7279 | if (init.hasMetadataBlocks) { |
7280 | drflac_read_proc onReadOverride = onRead; |
7281 | drflac_seek_proc onSeekOverride = onSeek; |
7282 | void* pUserDataOverride = pUserData; |
7283 | |
7284 | #ifndef DR_FLAC_NO_OGG |
7285 | if (init.container == drflac_container_ogg) { |
7286 | onReadOverride = drflac__on_read_ogg; |
7287 | onSeekOverride = drflac__on_seek_ogg; |
7288 | pUserDataOverride = (void*)&oggbs; |
7289 | } |
7290 | #endif |
7291 | |
7292 | if (!drflac__read_and_decode_metadata(onReadOverride, onSeekOverride, onMeta, pUserDataOverride, pUserDataMD, &firstFramePos, &seektablePos, &seektableSize, &allocationCallbacks)) { |
7293 | return NULL; |
7294 | } |
7295 | |
7296 | allocationSize += seektableSize; |
7297 | } |
7298 | |
7299 | |
7300 | pFlac = (drflac*)drflac__malloc_from_callbacks(allocationSize, &allocationCallbacks); |
7301 | if (pFlac == NULL) { |
7302 | return NULL; |
7303 | } |
7304 | |
7305 | drflac__init_from_info(pFlac, &init); |
7306 | pFlac->allocationCallbacks = allocationCallbacks; |
7307 | pFlac->pDecodedSamples = (drflac_int32*)drflac_align((size_t)pFlac->pExtraData, DRFLAC_MAX_SIMD_VECTOR_SIZE); |
7308 | |
7309 | #ifndef DR_FLAC_NO_OGG |
7310 | if (init.container == drflac_container_ogg) { |
7311 | drflac_oggbs* pInternalOggbs = (drflac_oggbs*)((drflac_uint8*)pFlac->pDecodedSamples + decodedSamplesAllocationSize + seektableSize); |
7312 | *pInternalOggbs = oggbs; |
7313 | |
7314 | /* The Ogg bistream needs to be layered on top of the original bitstream. */ |
7315 | pFlac->bs.onRead = drflac__on_read_ogg; |
7316 | pFlac->bs.onSeek = drflac__on_seek_ogg; |
7317 | pFlac->bs.pUserData = (void*)pInternalOggbs; |
7318 | pFlac->_oggbs = (void*)pInternalOggbs; |
7319 | } |
7320 | #endif |
7321 | |
7322 | pFlac->firstFLACFramePosInBytes = firstFramePos; |
7323 | |
7324 | /* 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. */ |
7325 | #ifndef DR_FLAC_NO_OGG |
7326 | if (init.container == drflac_container_ogg) |
7327 | { |
7328 | pFlac->pSeekpoints = NULL; |
7329 | pFlac->seekpointCount = 0; |
7330 | } |
7331 | else |
7332 | #endif |
7333 | { |
7334 | /* If we have a seektable we need to load it now, making sure we move back to where we were previously. */ |
7335 | if (seektablePos != 0) { |
7336 | pFlac->seekpointCount = seektableSize / sizeof(*pFlac->pSeekpoints); |
7337 | pFlac->pSeekpoints = (drflac_seekpoint*)((drflac_uint8*)pFlac->pDecodedSamples + decodedSamplesAllocationSize); |
7338 | |
7339 | DRFLAC_ASSERT(pFlac->bs.onSeek != NULL); |
7340 | DRFLAC_ASSERT(pFlac->bs.onRead != NULL); |
7341 | |
7342 | /* Seek to the seektable, then just read directly into our seektable buffer. */ |
7343 | if (pFlac->bs.onSeek(pFlac->bs.pUserData, (int)seektablePos, drflac_seek_origin_start)) { |
7344 | if (pFlac->bs.onRead(pFlac->bs.pUserData, pFlac->pSeekpoints, seektableSize) == seektableSize) { |
7345 | /* Endian swap. */ |
7346 | drflac_uint32 iSeekpoint; |
7347 | for (iSeekpoint = 0; iSeekpoint < pFlac->seekpointCount; ++iSeekpoint) { |
7348 | pFlac->pSeekpoints[iSeekpoint].firstPCMFrame = drflac__be2host_64(pFlac->pSeekpoints[iSeekpoint].firstPCMFrame); |
7349 | pFlac->pSeekpoints[iSeekpoint].flacFrameOffset = drflac__be2host_64(pFlac->pSeekpoints[iSeekpoint].flacFrameOffset); |
7350 | pFlac->pSeekpoints[iSeekpoint].pcmFrameCount = drflac__be2host_16(pFlac->pSeekpoints[iSeekpoint].pcmFrameCount); |
f5b7bb83 |
7351 | } |
7352 | } else { |
7353 | /* Failed to read the seektable. Pretend we don't have one. */ |
7354 | pFlac->pSeekpoints = NULL; |
7355 | pFlac->seekpointCount = 0; |
7356 | } |
2ff0b512 |
7357 | |
f5b7bb83 |
7358 | /* We need to seek back to where we were. If this fails it's a critical error. */ |
7359 | if (!pFlac->bs.onSeek(pFlac->bs.pUserData, (int)pFlac->firstFLACFramePosInBytes, drflac_seek_origin_start)) { |
7360 | drflac__free_from_callbacks(pFlac, &allocationCallbacks); |
7361 | return NULL; |
7362 | } |
7363 | } else { |
7364 | /* Failed to seek to the seektable. Ominous sign, but for now we can just pretend we don't have one. */ |
7365 | pFlac->pSeekpoints = NULL; |
7366 | pFlac->seekpointCount = 0; |
7367 | } |
7368 | } |
2ff0b512 |
7369 | } |
7370 | |
2ff0b512 |
7371 | |
f5b7bb83 |
7372 | /* |
7373 | 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 |
7374 | the first frame. |
7375 | */ |
7376 | if (!init.hasStreamInfoBlock) { |
7377 | pFlac->currentFLACFrame.header = init.firstFrameHeader; |
7378 | for (;;) { |
7379 | drflac_result result = drflac__decode_flac_frame(pFlac); |
7380 | if (result == DRFLAC_SUCCESS) { |
7381 | break; |
7382 | } else { |
7383 | if (result == DRFLAC_CRC_MISMATCH) { |
7384 | if (!drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFLACFrame.header)) { |
7385 | drflac__free_from_callbacks(pFlac, &allocationCallbacks); |
7386 | return NULL; |
7387 | } |
7388 | continue; |
7389 | } else { |
7390 | drflac__free_from_callbacks(pFlac, &allocationCallbacks); |
7391 | return NULL; |
7392 | } |
7393 | } |
7394 | } |
2ff0b512 |
7395 | } |
7396 | |
7397 | return pFlac; |
7398 | } |
2ff0b512 |
7399 | |
7400 | static size_t drflac__on_read_memory(void* pUserData, void* bufferOut, size_t bytesToRead) |
7401 | { |
7402 | drflac__memory_stream* memoryStream = (drflac__memory_stream*)pUserData; |
7403 | size_t bytesRemaining; |
7404 | |
7405 | DRFLAC_ASSERT(memoryStream != NULL); |
7406 | DRFLAC_ASSERT(memoryStream->dataSize >= memoryStream->currentReadPos); |
7407 | |
7408 | bytesRemaining = memoryStream->dataSize - memoryStream->currentReadPos; |
7409 | if (bytesToRead > bytesRemaining) { |
7410 | bytesToRead = bytesRemaining; |
7411 | } |
7412 | |
7413 | if (bytesToRead > 0) { |
7414 | DRFLAC_COPY_MEMORY(bufferOut, memoryStream->data + memoryStream->currentReadPos, bytesToRead); |
7415 | memoryStream->currentReadPos += bytesToRead; |
7416 | } |
7417 | |
7418 | return bytesToRead; |
7419 | } |
7420 | |
7421 | static drflac_bool32 drflac__on_seek_memory(void* pUserData, int offset, drflac_seek_origin origin) |
7422 | { |
7423 | drflac__memory_stream* memoryStream = (drflac__memory_stream*)pUserData; |
7424 | |
7425 | DRFLAC_ASSERT(memoryStream != NULL); |
7426 | DRFLAC_ASSERT(offset >= 0); /* <-- Never seek backwards. */ |
7427 | |
7428 | if (offset > (drflac_int64)memoryStream->dataSize) { |
7429 | return DRFLAC_FALSE; |
7430 | } |
7431 | |
7432 | if (origin == drflac_seek_origin_current) { |
7433 | if (memoryStream->currentReadPos + offset <= memoryStream->dataSize) { |
7434 | memoryStream->currentReadPos += offset; |
7435 | } else { |
7436 | return DRFLAC_FALSE; /* Trying to seek too far forward. */ |
7437 | } |
7438 | } else { |
7439 | if ((drflac_uint32)offset <= memoryStream->dataSize) { |
7440 | memoryStream->currentReadPos = offset; |
7441 | } else { |
7442 | return DRFLAC_FALSE; /* Trying to seek too far forward. */ |
7443 | } |
7444 | } |
7445 | |
7446 | return DRFLAC_TRUE; |
7447 | } |
7448 | |
7449 | DRFLAC_API drflac* drflac_open_memory(const void* pData, size_t dataSize, const drflac_allocation_callbacks* pAllocationCallbacks) |
7450 | { |
7451 | drflac__memory_stream memoryStream; |
7452 | drflac* pFlac; |
7453 | |
7454 | memoryStream.data = (const drflac_uint8*)pData; |
7455 | memoryStream.dataSize = dataSize; |
7456 | memoryStream.currentReadPos = 0; |
7457 | pFlac = drflac_open(drflac__on_read_memory, drflac__on_seek_memory, &memoryStream, pAllocationCallbacks); |
7458 | if (pFlac == NULL) { |
7459 | return NULL; |
7460 | } |
7461 | |
7462 | pFlac->memoryStream = memoryStream; |
7463 | |
7464 | /* This is an awful hack... */ |
7465 | #ifndef DR_FLAC_NO_OGG |
7466 | if (pFlac->container == drflac_container_ogg) |
7467 | { |
7468 | drflac_oggbs* oggbs = (drflac_oggbs*)pFlac->_oggbs; |
7469 | oggbs->pUserData = &pFlac->memoryStream; |
7470 | } |
7471 | else |
7472 | #endif |
7473 | { |
7474 | pFlac->bs.pUserData = &pFlac->memoryStream; |
7475 | } |
7476 | |
7477 | return pFlac; |
7478 | } |
7479 | |
7480 | 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) |
7481 | { |
7482 | drflac__memory_stream memoryStream; |
7483 | drflac* pFlac; |
7484 | |
7485 | memoryStream.data = (const drflac_uint8*)pData; |
7486 | memoryStream.dataSize = dataSize; |
7487 | memoryStream.currentReadPos = 0; |
7488 | pFlac = drflac_open_with_metadata_private(drflac__on_read_memory, drflac__on_seek_memory, onMeta, drflac_container_unknown, &memoryStream, pUserData, pAllocationCallbacks); |
7489 | if (pFlac == NULL) { |
7490 | return NULL; |
7491 | } |
7492 | |
7493 | pFlac->memoryStream = memoryStream; |
7494 | |
7495 | /* This is an awful hack... */ |
7496 | #ifndef DR_FLAC_NO_OGG |
7497 | if (pFlac->container == drflac_container_ogg) |
7498 | { |
7499 | drflac_oggbs* oggbs = (drflac_oggbs*)pFlac->_oggbs; |
7500 | oggbs->pUserData = &pFlac->memoryStream; |
7501 | } |
7502 | else |
7503 | #endif |
7504 | { |
7505 | pFlac->bs.pUserData = &pFlac->memoryStream; |
7506 | } |
7507 | |
7508 | return pFlac; |
7509 | } |
7510 | |
7511 | |
7512 | |
7513 | DRFLAC_API drflac* drflac_open(drflac_read_proc onRead, drflac_seek_proc onSeek, void* pUserData, const drflac_allocation_callbacks* pAllocationCallbacks) |
7514 | { |
7515 | return drflac_open_with_metadata_private(onRead, onSeek, NULL, drflac_container_unknown, pUserData, pUserData, pAllocationCallbacks); |
7516 | } |
7517 | DRFLAC_API drflac* drflac_open_relaxed(drflac_read_proc onRead, drflac_seek_proc onSeek, drflac_container container, void* pUserData, const drflac_allocation_callbacks* pAllocationCallbacks) |
7518 | { |
7519 | return drflac_open_with_metadata_private(onRead, onSeek, NULL, container, pUserData, pUserData, pAllocationCallbacks); |
7520 | } |
7521 | |
7522 | 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) |
7523 | { |
7524 | return drflac_open_with_metadata_private(onRead, onSeek, onMeta, drflac_container_unknown, pUserData, pUserData, pAllocationCallbacks); |
7525 | } |
7526 | 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) |
7527 | { |
7528 | return drflac_open_with_metadata_private(onRead, onSeek, onMeta, container, pUserData, pUserData, pAllocationCallbacks); |
7529 | } |
7530 | |
7531 | DRFLAC_API void drflac_close(drflac* pFlac) |
7532 | { |
7533 | if (pFlac == NULL) { |
7534 | return; |
7535 | } |
7536 | |
2ff0b512 |
7537 | drflac__free_from_callbacks(pFlac, &pFlac->allocationCallbacks); |
7538 | } |
7539 | |
2ff0b512 |
7540 | 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) |
7541 | { |
7542 | drflac_uint64 i; |
7543 | drflac_uint64 frameCount4 = frameCount >> 2; |
7544 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
7545 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
7546 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
7547 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
7548 | |
7549 | for (i = 0; i < frameCount4; ++i) { |
7550 | drflac_uint32 left0 = pInputSamples0U32[i*4+0] << shift0; |
7551 | drflac_uint32 left1 = pInputSamples0U32[i*4+1] << shift0; |
7552 | drflac_uint32 left2 = pInputSamples0U32[i*4+2] << shift0; |
7553 | drflac_uint32 left3 = pInputSamples0U32[i*4+3] << shift0; |
7554 | |
7555 | drflac_uint32 side0 = pInputSamples1U32[i*4+0] << shift1; |
7556 | drflac_uint32 side1 = pInputSamples1U32[i*4+1] << shift1; |
7557 | drflac_uint32 side2 = pInputSamples1U32[i*4+2] << shift1; |
7558 | drflac_uint32 side3 = pInputSamples1U32[i*4+3] << shift1; |
7559 | |
7560 | drflac_uint32 right0 = left0 - side0; |
7561 | drflac_uint32 right1 = left1 - side1; |
7562 | drflac_uint32 right2 = left2 - side2; |
7563 | drflac_uint32 right3 = left3 - side3; |
7564 | |
7565 | pOutputSamples[i*8+0] = (drflac_int32)left0; |
7566 | pOutputSamples[i*8+1] = (drflac_int32)right0; |
7567 | pOutputSamples[i*8+2] = (drflac_int32)left1; |
7568 | pOutputSamples[i*8+3] = (drflac_int32)right1; |
7569 | pOutputSamples[i*8+4] = (drflac_int32)left2; |
7570 | pOutputSamples[i*8+5] = (drflac_int32)right2; |
7571 | pOutputSamples[i*8+6] = (drflac_int32)left3; |
7572 | pOutputSamples[i*8+7] = (drflac_int32)right3; |
7573 | } |
7574 | |
7575 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
7576 | drflac_uint32 left = pInputSamples0U32[i] << shift0; |
7577 | drflac_uint32 side = pInputSamples1U32[i] << shift1; |
7578 | drflac_uint32 right = left - side; |
7579 | |
7580 | pOutputSamples[i*2+0] = (drflac_int32)left; |
7581 | pOutputSamples[i*2+1] = (drflac_int32)right; |
7582 | } |
7583 | } |
7584 | |
7585 | #if defined(DRFLAC_SUPPORT_SSE2) |
7586 | 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) |
7587 | { |
7588 | drflac_uint64 i; |
7589 | drflac_uint64 frameCount4 = frameCount >> 2; |
7590 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
7591 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
7592 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
7593 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
7594 | |
7595 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
7596 | |
7597 | for (i = 0; i < frameCount4; ++i) { |
7598 | __m128i left = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), shift0); |
7599 | __m128i side = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), shift1); |
7600 | __m128i right = _mm_sub_epi32(left, side); |
7601 | |
7602 | _mm_storeu_si128((__m128i*)(pOutputSamples + i*8 + 0), _mm_unpacklo_epi32(left, right)); |
7603 | _mm_storeu_si128((__m128i*)(pOutputSamples + i*8 + 4), _mm_unpackhi_epi32(left, right)); |
7604 | } |
7605 | |
7606 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
7607 | drflac_uint32 left = pInputSamples0U32[i] << shift0; |
7608 | drflac_uint32 side = pInputSamples1U32[i] << shift1; |
7609 | drflac_uint32 right = left - side; |
7610 | |
7611 | pOutputSamples[i*2+0] = (drflac_int32)left; |
7612 | pOutputSamples[i*2+1] = (drflac_int32)right; |
7613 | } |
7614 | } |
7615 | #endif |
7616 | |
7617 | #if defined(DRFLAC_SUPPORT_NEON) |
7618 | 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) |
7619 | { |
7620 | drflac_uint64 i; |
7621 | drflac_uint64 frameCount4 = frameCount >> 2; |
7622 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
7623 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
7624 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
7625 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
7626 | int32x4_t shift0_4; |
7627 | int32x4_t shift1_4; |
7628 | |
7629 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
7630 | |
7631 | shift0_4 = vdupq_n_s32(shift0); |
7632 | shift1_4 = vdupq_n_s32(shift1); |
7633 | |
7634 | for (i = 0; i < frameCount4; ++i) { |
7635 | uint32x4_t left; |
7636 | uint32x4_t side; |
7637 | uint32x4_t right; |
7638 | |
7639 | left = vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), shift0_4); |
7640 | side = vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), shift1_4); |
7641 | right = vsubq_u32(left, side); |
7642 | |
7643 | drflac__vst2q_u32((drflac_uint32*)pOutputSamples + i*8, vzipq_u32(left, right)); |
7644 | } |
7645 | |
7646 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
7647 | drflac_uint32 left = pInputSamples0U32[i] << shift0; |
7648 | drflac_uint32 side = pInputSamples1U32[i] << shift1; |
7649 | drflac_uint32 right = left - side; |
7650 | |
7651 | pOutputSamples[i*2+0] = (drflac_int32)left; |
7652 | pOutputSamples[i*2+1] = (drflac_int32)right; |
7653 | } |
7654 | } |
7655 | #endif |
7656 | |
7657 | 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) |
7658 | { |
7659 | #if defined(DRFLAC_SUPPORT_SSE2) |
7660 | if (drflac__gIsSSE2Supported && pFlac->bitsPerSample <= 24) { |
7661 | drflac_read_pcm_frames_s32__decode_left_side__sse2(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
7662 | } else |
7663 | #elif defined(DRFLAC_SUPPORT_NEON) |
7664 | if (drflac__gIsNEONSupported && pFlac->bitsPerSample <= 24) { |
7665 | drflac_read_pcm_frames_s32__decode_left_side__neon(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
7666 | } else |
7667 | #endif |
7668 | { |
7669 | /* Scalar fallback. */ |
2ff0b512 |
7670 | drflac_read_pcm_frames_s32__decode_left_side__scalar(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
2ff0b512 |
7671 | } |
7672 | } |
7673 | |
7674 | |
2ff0b512 |
7675 | 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) |
7676 | { |
7677 | drflac_uint64 i; |
7678 | drflac_uint64 frameCount4 = frameCount >> 2; |
7679 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
7680 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
7681 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
7682 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
7683 | |
7684 | for (i = 0; i < frameCount4; ++i) { |
7685 | drflac_uint32 side0 = pInputSamples0U32[i*4+0] << shift0; |
7686 | drflac_uint32 side1 = pInputSamples0U32[i*4+1] << shift0; |
7687 | drflac_uint32 side2 = pInputSamples0U32[i*4+2] << shift0; |
7688 | drflac_uint32 side3 = pInputSamples0U32[i*4+3] << shift0; |
7689 | |
7690 | drflac_uint32 right0 = pInputSamples1U32[i*4+0] << shift1; |
7691 | drflac_uint32 right1 = pInputSamples1U32[i*4+1] << shift1; |
7692 | drflac_uint32 right2 = pInputSamples1U32[i*4+2] << shift1; |
7693 | drflac_uint32 right3 = pInputSamples1U32[i*4+3] << shift1; |
7694 | |
7695 | drflac_uint32 left0 = right0 + side0; |
7696 | drflac_uint32 left1 = right1 + side1; |
7697 | drflac_uint32 left2 = right2 + side2; |
7698 | drflac_uint32 left3 = right3 + side3; |
7699 | |
7700 | pOutputSamples[i*8+0] = (drflac_int32)left0; |
7701 | pOutputSamples[i*8+1] = (drflac_int32)right0; |
7702 | pOutputSamples[i*8+2] = (drflac_int32)left1; |
7703 | pOutputSamples[i*8+3] = (drflac_int32)right1; |
7704 | pOutputSamples[i*8+4] = (drflac_int32)left2; |
7705 | pOutputSamples[i*8+5] = (drflac_int32)right2; |
7706 | pOutputSamples[i*8+6] = (drflac_int32)left3; |
7707 | pOutputSamples[i*8+7] = (drflac_int32)right3; |
7708 | } |
7709 | |
7710 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
7711 | drflac_uint32 side = pInputSamples0U32[i] << shift0; |
7712 | drflac_uint32 right = pInputSamples1U32[i] << shift1; |
7713 | drflac_uint32 left = right + side; |
7714 | |
7715 | pOutputSamples[i*2+0] = (drflac_int32)left; |
7716 | pOutputSamples[i*2+1] = (drflac_int32)right; |
7717 | } |
7718 | } |
7719 | |
7720 | #if defined(DRFLAC_SUPPORT_SSE2) |
7721 | 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) |
7722 | { |
7723 | drflac_uint64 i; |
7724 | drflac_uint64 frameCount4 = frameCount >> 2; |
7725 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
7726 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
7727 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
7728 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
7729 | |
7730 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
7731 | |
7732 | for (i = 0; i < frameCount4; ++i) { |
7733 | __m128i side = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), shift0); |
7734 | __m128i right = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), shift1); |
7735 | __m128i left = _mm_add_epi32(right, side); |
7736 | |
7737 | _mm_storeu_si128((__m128i*)(pOutputSamples + i*8 + 0), _mm_unpacklo_epi32(left, right)); |
7738 | _mm_storeu_si128((__m128i*)(pOutputSamples + i*8 + 4), _mm_unpackhi_epi32(left, right)); |
7739 | } |
7740 | |
7741 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
7742 | drflac_uint32 side = pInputSamples0U32[i] << shift0; |
7743 | drflac_uint32 right = pInputSamples1U32[i] << shift1; |
7744 | drflac_uint32 left = right + side; |
7745 | |
7746 | pOutputSamples[i*2+0] = (drflac_int32)left; |
7747 | pOutputSamples[i*2+1] = (drflac_int32)right; |
7748 | } |
7749 | } |
7750 | #endif |
7751 | |
7752 | #if defined(DRFLAC_SUPPORT_NEON) |
7753 | 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) |
7754 | { |
7755 | drflac_uint64 i; |
7756 | drflac_uint64 frameCount4 = frameCount >> 2; |
7757 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
7758 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
7759 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
7760 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
7761 | int32x4_t shift0_4; |
7762 | int32x4_t shift1_4; |
7763 | |
7764 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
7765 | |
7766 | shift0_4 = vdupq_n_s32(shift0); |
7767 | shift1_4 = vdupq_n_s32(shift1); |
7768 | |
7769 | for (i = 0; i < frameCount4; ++i) { |
7770 | uint32x4_t side; |
7771 | uint32x4_t right; |
7772 | uint32x4_t left; |
7773 | |
7774 | side = vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), shift0_4); |
7775 | right = vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), shift1_4); |
7776 | left = vaddq_u32(right, side); |
7777 | |
7778 | drflac__vst2q_u32((drflac_uint32*)pOutputSamples + i*8, vzipq_u32(left, right)); |
7779 | } |
7780 | |
7781 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
7782 | drflac_uint32 side = pInputSamples0U32[i] << shift0; |
7783 | drflac_uint32 right = pInputSamples1U32[i] << shift1; |
7784 | drflac_uint32 left = right + side; |
7785 | |
7786 | pOutputSamples[i*2+0] = (drflac_int32)left; |
7787 | pOutputSamples[i*2+1] = (drflac_int32)right; |
7788 | } |
7789 | } |
7790 | #endif |
7791 | |
7792 | 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) |
7793 | { |
7794 | #if defined(DRFLAC_SUPPORT_SSE2) |
7795 | if (drflac__gIsSSE2Supported && pFlac->bitsPerSample <= 24) { |
7796 | drflac_read_pcm_frames_s32__decode_right_side__sse2(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
7797 | } else |
7798 | #elif defined(DRFLAC_SUPPORT_NEON) |
7799 | if (drflac__gIsNEONSupported && pFlac->bitsPerSample <= 24) { |
7800 | drflac_read_pcm_frames_s32__decode_right_side__neon(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
7801 | } else |
7802 | #endif |
7803 | { |
7804 | /* Scalar fallback. */ |
2ff0b512 |
7805 | drflac_read_pcm_frames_s32__decode_right_side__scalar(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
2ff0b512 |
7806 | } |
7807 | } |
7808 | |
7809 | |
2ff0b512 |
7810 | 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) |
7811 | { |
7812 | drflac_uint64 i; |
7813 | drflac_uint64 frameCount4 = frameCount >> 2; |
7814 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
7815 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
7816 | drflac_int32 shift = unusedBitsPerSample; |
7817 | |
7818 | if (shift > 0) { |
7819 | shift -= 1; |
7820 | for (i = 0; i < frameCount4; ++i) { |
7821 | drflac_uint32 temp0L; |
7822 | drflac_uint32 temp1L; |
7823 | drflac_uint32 temp2L; |
7824 | drflac_uint32 temp3L; |
7825 | drflac_uint32 temp0R; |
7826 | drflac_uint32 temp1R; |
7827 | drflac_uint32 temp2R; |
7828 | drflac_uint32 temp3R; |
7829 | |
7830 | drflac_uint32 mid0 = pInputSamples0U32[i*4+0] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
7831 | drflac_uint32 mid1 = pInputSamples0U32[i*4+1] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
7832 | drflac_uint32 mid2 = pInputSamples0U32[i*4+2] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
7833 | drflac_uint32 mid3 = pInputSamples0U32[i*4+3] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
7834 | |
7835 | drflac_uint32 side0 = pInputSamples1U32[i*4+0] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
7836 | drflac_uint32 side1 = pInputSamples1U32[i*4+1] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
7837 | drflac_uint32 side2 = pInputSamples1U32[i*4+2] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
7838 | drflac_uint32 side3 = pInputSamples1U32[i*4+3] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
7839 | |
7840 | mid0 = (mid0 << 1) | (side0 & 0x01); |
7841 | mid1 = (mid1 << 1) | (side1 & 0x01); |
7842 | mid2 = (mid2 << 1) | (side2 & 0x01); |
7843 | mid3 = (mid3 << 1) | (side3 & 0x01); |
7844 | |
7845 | temp0L = (mid0 + side0) << shift; |
7846 | temp1L = (mid1 + side1) << shift; |
7847 | temp2L = (mid2 + side2) << shift; |
7848 | temp3L = (mid3 + side3) << shift; |
7849 | |
7850 | temp0R = (mid0 - side0) << shift; |
7851 | temp1R = (mid1 - side1) << shift; |
7852 | temp2R = (mid2 - side2) << shift; |
7853 | temp3R = (mid3 - side3) << shift; |
7854 | |
7855 | pOutputSamples[i*8+0] = (drflac_int32)temp0L; |
7856 | pOutputSamples[i*8+1] = (drflac_int32)temp0R; |
7857 | pOutputSamples[i*8+2] = (drflac_int32)temp1L; |
7858 | pOutputSamples[i*8+3] = (drflac_int32)temp1R; |
7859 | pOutputSamples[i*8+4] = (drflac_int32)temp2L; |
7860 | pOutputSamples[i*8+5] = (drflac_int32)temp2R; |
7861 | pOutputSamples[i*8+6] = (drflac_int32)temp3L; |
7862 | pOutputSamples[i*8+7] = (drflac_int32)temp3R; |
7863 | } |
7864 | } else { |
7865 | for (i = 0; i < frameCount4; ++i) { |
7866 | drflac_uint32 temp0L; |
7867 | drflac_uint32 temp1L; |
7868 | drflac_uint32 temp2L; |
7869 | drflac_uint32 temp3L; |
7870 | drflac_uint32 temp0R; |
7871 | drflac_uint32 temp1R; |
7872 | drflac_uint32 temp2R; |
7873 | drflac_uint32 temp3R; |
7874 | |
7875 | drflac_uint32 mid0 = pInputSamples0U32[i*4+0] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
7876 | drflac_uint32 mid1 = pInputSamples0U32[i*4+1] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
7877 | drflac_uint32 mid2 = pInputSamples0U32[i*4+2] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
7878 | drflac_uint32 mid3 = pInputSamples0U32[i*4+3] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
7879 | |
7880 | drflac_uint32 side0 = pInputSamples1U32[i*4+0] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
7881 | drflac_uint32 side1 = pInputSamples1U32[i*4+1] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
7882 | drflac_uint32 side2 = pInputSamples1U32[i*4+2] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
7883 | drflac_uint32 side3 = pInputSamples1U32[i*4+3] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
7884 | |
7885 | mid0 = (mid0 << 1) | (side0 & 0x01); |
7886 | mid1 = (mid1 << 1) | (side1 & 0x01); |
7887 | mid2 = (mid2 << 1) | (side2 & 0x01); |
7888 | mid3 = (mid3 << 1) | (side3 & 0x01); |
7889 | |
7890 | temp0L = (drflac_uint32)((drflac_int32)(mid0 + side0) >> 1); |
7891 | temp1L = (drflac_uint32)((drflac_int32)(mid1 + side1) >> 1); |
7892 | temp2L = (drflac_uint32)((drflac_int32)(mid2 + side2) >> 1); |
7893 | temp3L = (drflac_uint32)((drflac_int32)(mid3 + side3) >> 1); |
7894 | |
7895 | temp0R = (drflac_uint32)((drflac_int32)(mid0 - side0) >> 1); |
7896 | temp1R = (drflac_uint32)((drflac_int32)(mid1 - side1) >> 1); |
7897 | temp2R = (drflac_uint32)((drflac_int32)(mid2 - side2) >> 1); |
7898 | temp3R = (drflac_uint32)((drflac_int32)(mid3 - side3) >> 1); |
7899 | |
7900 | pOutputSamples[i*8+0] = (drflac_int32)temp0L; |
7901 | pOutputSamples[i*8+1] = (drflac_int32)temp0R; |
7902 | pOutputSamples[i*8+2] = (drflac_int32)temp1L; |
7903 | pOutputSamples[i*8+3] = (drflac_int32)temp1R; |
7904 | pOutputSamples[i*8+4] = (drflac_int32)temp2L; |
7905 | pOutputSamples[i*8+5] = (drflac_int32)temp2R; |
7906 | pOutputSamples[i*8+6] = (drflac_int32)temp3L; |
7907 | pOutputSamples[i*8+7] = (drflac_int32)temp3R; |
7908 | } |
7909 | } |
7910 | |
7911 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
7912 | drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
7913 | drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
7914 | |
7915 | mid = (mid << 1) | (side & 0x01); |
7916 | |
7917 | pOutputSamples[i*2+0] = (drflac_int32)((drflac_uint32)((drflac_int32)(mid + side) >> 1) << unusedBitsPerSample); |
7918 | pOutputSamples[i*2+1] = (drflac_int32)((drflac_uint32)((drflac_int32)(mid - side) >> 1) << unusedBitsPerSample); |
7919 | } |
7920 | } |
7921 | |
7922 | #if defined(DRFLAC_SUPPORT_SSE2) |
7923 | 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) |
7924 | { |
7925 | drflac_uint64 i; |
7926 | drflac_uint64 frameCount4 = frameCount >> 2; |
7927 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
7928 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
7929 | drflac_int32 shift = unusedBitsPerSample; |
7930 | |
7931 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
7932 | |
7933 | if (shift == 0) { |
7934 | for (i = 0; i < frameCount4; ++i) { |
7935 | __m128i mid; |
7936 | __m128i side; |
7937 | __m128i left; |
7938 | __m128i right; |
7939 | |
7940 | mid = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); |
7941 | side = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); |
7942 | |
7943 | mid = _mm_or_si128(_mm_slli_epi32(mid, 1), _mm_and_si128(side, _mm_set1_epi32(0x01))); |
7944 | |
7945 | left = _mm_srai_epi32(_mm_add_epi32(mid, side), 1); |
7946 | right = _mm_srai_epi32(_mm_sub_epi32(mid, side), 1); |
7947 | |
7948 | _mm_storeu_si128((__m128i*)(pOutputSamples + i*8 + 0), _mm_unpacklo_epi32(left, right)); |
7949 | _mm_storeu_si128((__m128i*)(pOutputSamples + i*8 + 4), _mm_unpackhi_epi32(left, right)); |
7950 | } |
7951 | |
7952 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
7953 | drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
7954 | drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
7955 | |
7956 | mid = (mid << 1) | (side & 0x01); |
7957 | |
7958 | pOutputSamples[i*2+0] = (drflac_int32)(mid + side) >> 1; |
7959 | pOutputSamples[i*2+1] = (drflac_int32)(mid - side) >> 1; |
7960 | } |
7961 | } else { |
7962 | shift -= 1; |
7963 | for (i = 0; i < frameCount4; ++i) { |
7964 | __m128i mid; |
7965 | __m128i side; |
7966 | __m128i left; |
7967 | __m128i right; |
7968 | |
7969 | mid = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); |
7970 | side = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); |
7971 | |
7972 | mid = _mm_or_si128(_mm_slli_epi32(mid, 1), _mm_and_si128(side, _mm_set1_epi32(0x01))); |
7973 | |
7974 | left = _mm_slli_epi32(_mm_add_epi32(mid, side), shift); |
7975 | right = _mm_slli_epi32(_mm_sub_epi32(mid, side), shift); |
7976 | |
7977 | _mm_storeu_si128((__m128i*)(pOutputSamples + i*8 + 0), _mm_unpacklo_epi32(left, right)); |
7978 | _mm_storeu_si128((__m128i*)(pOutputSamples + i*8 + 4), _mm_unpackhi_epi32(left, right)); |
7979 | } |
7980 | |
7981 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
7982 | drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
7983 | drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
7984 | |
7985 | mid = (mid << 1) | (side & 0x01); |
7986 | |
7987 | pOutputSamples[i*2+0] = (drflac_int32)((mid + side) << shift); |
7988 | pOutputSamples[i*2+1] = (drflac_int32)((mid - side) << shift); |
7989 | } |
7990 | } |
7991 | } |
7992 | #endif |
7993 | |
7994 | #if defined(DRFLAC_SUPPORT_NEON) |
7995 | 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) |
7996 | { |
7997 | drflac_uint64 i; |
7998 | drflac_uint64 frameCount4 = frameCount >> 2; |
7999 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
8000 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
8001 | drflac_int32 shift = unusedBitsPerSample; |
8002 | int32x4_t wbpsShift0_4; /* wbps = Wasted Bits Per Sample */ |
8003 | int32x4_t wbpsShift1_4; /* wbps = Wasted Bits Per Sample */ |
8004 | uint32x4_t one4; |
8005 | |
8006 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
8007 | |
8008 | wbpsShift0_4 = vdupq_n_s32(pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); |
8009 | wbpsShift1_4 = vdupq_n_s32(pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); |
8010 | one4 = vdupq_n_u32(1); |
8011 | |
8012 | if (shift == 0) { |
8013 | for (i = 0; i < frameCount4; ++i) { |
8014 | uint32x4_t mid; |
8015 | uint32x4_t side; |
8016 | int32x4_t left; |
8017 | int32x4_t right; |
8018 | |
8019 | mid = vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), wbpsShift0_4); |
8020 | side = vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), wbpsShift1_4); |
8021 | |
8022 | mid = vorrq_u32(vshlq_n_u32(mid, 1), vandq_u32(side, one4)); |
8023 | |
8024 | left = vshrq_n_s32(vreinterpretq_s32_u32(vaddq_u32(mid, side)), 1); |
8025 | right = vshrq_n_s32(vreinterpretq_s32_u32(vsubq_u32(mid, side)), 1); |
8026 | |
8027 | drflac__vst2q_s32(pOutputSamples + i*8, vzipq_s32(left, right)); |
8028 | } |
8029 | |
8030 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
8031 | drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
8032 | drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
8033 | |
8034 | mid = (mid << 1) | (side & 0x01); |
8035 | |
8036 | pOutputSamples[i*2+0] = (drflac_int32)(mid + side) >> 1; |
8037 | pOutputSamples[i*2+1] = (drflac_int32)(mid - side) >> 1; |
8038 | } |
8039 | } else { |
8040 | int32x4_t shift4; |
8041 | |
8042 | shift -= 1; |
8043 | shift4 = vdupq_n_s32(shift); |
8044 | |
8045 | for (i = 0; i < frameCount4; ++i) { |
8046 | uint32x4_t mid; |
8047 | uint32x4_t side; |
8048 | int32x4_t left; |
8049 | int32x4_t right; |
8050 | |
8051 | mid = vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), wbpsShift0_4); |
8052 | side = vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), wbpsShift1_4); |
8053 | |
8054 | mid = vorrq_u32(vshlq_n_u32(mid, 1), vandq_u32(side, one4)); |
8055 | |
8056 | left = vreinterpretq_s32_u32(vshlq_u32(vaddq_u32(mid, side), shift4)); |
8057 | right = vreinterpretq_s32_u32(vshlq_u32(vsubq_u32(mid, side), shift4)); |
8058 | |
8059 | drflac__vst2q_s32(pOutputSamples + i*8, vzipq_s32(left, right)); |
8060 | } |
8061 | |
8062 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
8063 | drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
8064 | drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
8065 | |
8066 | mid = (mid << 1) | (side & 0x01); |
8067 | |
8068 | pOutputSamples[i*2+0] = (drflac_int32)((mid + side) << shift); |
8069 | pOutputSamples[i*2+1] = (drflac_int32)((mid - side) << shift); |
8070 | } |
8071 | } |
8072 | } |
8073 | #endif |
8074 | |
8075 | 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) |
8076 | { |
8077 | #if defined(DRFLAC_SUPPORT_SSE2) |
8078 | if (drflac__gIsSSE2Supported && pFlac->bitsPerSample <= 24) { |
8079 | drflac_read_pcm_frames_s32__decode_mid_side__sse2(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
8080 | } else |
8081 | #elif defined(DRFLAC_SUPPORT_NEON) |
8082 | if (drflac__gIsNEONSupported && pFlac->bitsPerSample <= 24) { |
8083 | drflac_read_pcm_frames_s32__decode_mid_side__neon(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
8084 | } else |
8085 | #endif |
8086 | { |
8087 | /* Scalar fallback. */ |
2ff0b512 |
8088 | drflac_read_pcm_frames_s32__decode_mid_side__scalar(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
2ff0b512 |
8089 | } |
8090 | } |
8091 | |
8092 | |
2ff0b512 |
8093 | 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) |
8094 | { |
8095 | drflac_uint64 i; |
8096 | drflac_uint64 frameCount4 = frameCount >> 2; |
8097 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
8098 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
8099 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
8100 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
8101 | |
8102 | for (i = 0; i < frameCount4; ++i) { |
8103 | drflac_uint32 tempL0 = pInputSamples0U32[i*4+0] << shift0; |
8104 | drflac_uint32 tempL1 = pInputSamples0U32[i*4+1] << shift0; |
8105 | drflac_uint32 tempL2 = pInputSamples0U32[i*4+2] << shift0; |
8106 | drflac_uint32 tempL3 = pInputSamples0U32[i*4+3] << shift0; |
8107 | |
8108 | drflac_uint32 tempR0 = pInputSamples1U32[i*4+0] << shift1; |
8109 | drflac_uint32 tempR1 = pInputSamples1U32[i*4+1] << shift1; |
8110 | drflac_uint32 tempR2 = pInputSamples1U32[i*4+2] << shift1; |
8111 | drflac_uint32 tempR3 = pInputSamples1U32[i*4+3] << shift1; |
8112 | |
8113 | pOutputSamples[i*8+0] = (drflac_int32)tempL0; |
8114 | pOutputSamples[i*8+1] = (drflac_int32)tempR0; |
8115 | pOutputSamples[i*8+2] = (drflac_int32)tempL1; |
8116 | pOutputSamples[i*8+3] = (drflac_int32)tempR1; |
8117 | pOutputSamples[i*8+4] = (drflac_int32)tempL2; |
8118 | pOutputSamples[i*8+5] = (drflac_int32)tempR2; |
8119 | pOutputSamples[i*8+6] = (drflac_int32)tempL3; |
8120 | pOutputSamples[i*8+7] = (drflac_int32)tempR3; |
8121 | } |
8122 | |
8123 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
8124 | pOutputSamples[i*2+0] = (drflac_int32)(pInputSamples0U32[i] << shift0); |
8125 | pOutputSamples[i*2+1] = (drflac_int32)(pInputSamples1U32[i] << shift1); |
8126 | } |
8127 | } |
8128 | |
8129 | #if defined(DRFLAC_SUPPORT_SSE2) |
8130 | 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) |
8131 | { |
8132 | drflac_uint64 i; |
8133 | drflac_uint64 frameCount4 = frameCount >> 2; |
8134 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
8135 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
8136 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
8137 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
8138 | |
8139 | for (i = 0; i < frameCount4; ++i) { |
8140 | __m128i left = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), shift0); |
8141 | __m128i right = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), shift1); |
8142 | |
8143 | _mm_storeu_si128((__m128i*)(pOutputSamples + i*8 + 0), _mm_unpacklo_epi32(left, right)); |
8144 | _mm_storeu_si128((__m128i*)(pOutputSamples + i*8 + 4), _mm_unpackhi_epi32(left, right)); |
8145 | } |
8146 | |
8147 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
8148 | pOutputSamples[i*2+0] = (drflac_int32)(pInputSamples0U32[i] << shift0); |
8149 | pOutputSamples[i*2+1] = (drflac_int32)(pInputSamples1U32[i] << shift1); |
8150 | } |
8151 | } |
8152 | #endif |
8153 | |
8154 | #if defined(DRFLAC_SUPPORT_NEON) |
8155 | 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) |
8156 | { |
8157 | drflac_uint64 i; |
8158 | drflac_uint64 frameCount4 = frameCount >> 2; |
8159 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
8160 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
8161 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
8162 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
8163 | |
8164 | int32x4_t shift4_0 = vdupq_n_s32(shift0); |
8165 | int32x4_t shift4_1 = vdupq_n_s32(shift1); |
8166 | |
8167 | for (i = 0; i < frameCount4; ++i) { |
8168 | int32x4_t left; |
8169 | int32x4_t right; |
8170 | |
8171 | left = vreinterpretq_s32_u32(vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), shift4_0)); |
8172 | right = vreinterpretq_s32_u32(vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), shift4_1)); |
8173 | |
8174 | drflac__vst2q_s32(pOutputSamples + i*8, vzipq_s32(left, right)); |
8175 | } |
8176 | |
8177 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
8178 | pOutputSamples[i*2+0] = (drflac_int32)(pInputSamples0U32[i] << shift0); |
8179 | pOutputSamples[i*2+1] = (drflac_int32)(pInputSamples1U32[i] << shift1); |
8180 | } |
8181 | } |
8182 | #endif |
8183 | |
8184 | 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) |
8185 | { |
8186 | #if defined(DRFLAC_SUPPORT_SSE2) |
8187 | if (drflac__gIsSSE2Supported && pFlac->bitsPerSample <= 24) { |
8188 | drflac_read_pcm_frames_s32__decode_independent_stereo__sse2(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
8189 | } else |
8190 | #elif defined(DRFLAC_SUPPORT_NEON) |
8191 | if (drflac__gIsNEONSupported && pFlac->bitsPerSample <= 24) { |
8192 | drflac_read_pcm_frames_s32__decode_independent_stereo__neon(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
8193 | } else |
8194 | #endif |
8195 | { |
8196 | /* Scalar fallback. */ |
2ff0b512 |
8197 | drflac_read_pcm_frames_s32__decode_independent_stereo__scalar(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
2ff0b512 |
8198 | } |
8199 | } |
8200 | |
8201 | |
8202 | DRFLAC_API drflac_uint64 drflac_read_pcm_frames_s32(drflac* pFlac, drflac_uint64 framesToRead, drflac_int32* pBufferOut) |
8203 | { |
8204 | drflac_uint64 framesRead; |
8205 | drflac_uint32 unusedBitsPerSample; |
8206 | |
8207 | if (pFlac == NULL || framesToRead == 0) { |
8208 | return 0; |
8209 | } |
8210 | |
8211 | if (pBufferOut == NULL) { |
8212 | return drflac__seek_forward_by_pcm_frames(pFlac, framesToRead); |
8213 | } |
8214 | |
8215 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 32); |
8216 | unusedBitsPerSample = 32 - pFlac->bitsPerSample; |
8217 | |
8218 | framesRead = 0; |
8219 | while (framesToRead > 0) { |
8220 | /* If we've run out of samples in this frame, go to the next. */ |
8221 | if (pFlac->currentFLACFrame.pcmFramesRemaining == 0) { |
8222 | if (!drflac__read_and_decode_next_flac_frame(pFlac)) { |
8223 | break; /* Couldn't read the next frame, so just break from the loop and return. */ |
8224 | } |
8225 | } else { |
8226 | unsigned int channelCount = drflac__get_channel_count_from_channel_assignment(pFlac->currentFLACFrame.header.channelAssignment); |
8227 | drflac_uint64 iFirstPCMFrame = pFlac->currentFLACFrame.header.blockSizeInPCMFrames - pFlac->currentFLACFrame.pcmFramesRemaining; |
8228 | drflac_uint64 frameCountThisIteration = framesToRead; |
8229 | |
8230 | if (frameCountThisIteration > pFlac->currentFLACFrame.pcmFramesRemaining) { |
8231 | frameCountThisIteration = pFlac->currentFLACFrame.pcmFramesRemaining; |
8232 | } |
8233 | |
8234 | if (channelCount == 2) { |
8235 | const drflac_int32* pDecodedSamples0 = pFlac->currentFLACFrame.subframes[0].pSamplesS32 + iFirstPCMFrame; |
8236 | const drflac_int32* pDecodedSamples1 = pFlac->currentFLACFrame.subframes[1].pSamplesS32 + iFirstPCMFrame; |
8237 | |
8238 | switch (pFlac->currentFLACFrame.header.channelAssignment) |
8239 | { |
8240 | case DRFLAC_CHANNEL_ASSIGNMENT_LEFT_SIDE: |
8241 | { |
8242 | drflac_read_pcm_frames_s32__decode_left_side(pFlac, frameCountThisIteration, unusedBitsPerSample, pDecodedSamples0, pDecodedSamples1, pBufferOut); |
8243 | } break; |
8244 | |
8245 | case DRFLAC_CHANNEL_ASSIGNMENT_RIGHT_SIDE: |
8246 | { |
8247 | drflac_read_pcm_frames_s32__decode_right_side(pFlac, frameCountThisIteration, unusedBitsPerSample, pDecodedSamples0, pDecodedSamples1, pBufferOut); |
8248 | } break; |
8249 | |
8250 | case DRFLAC_CHANNEL_ASSIGNMENT_MID_SIDE: |
8251 | { |
8252 | drflac_read_pcm_frames_s32__decode_mid_side(pFlac, frameCountThisIteration, unusedBitsPerSample, pDecodedSamples0, pDecodedSamples1, pBufferOut); |
8253 | } break; |
8254 | |
8255 | case DRFLAC_CHANNEL_ASSIGNMENT_INDEPENDENT: |
8256 | default: |
8257 | { |
8258 | drflac_read_pcm_frames_s32__decode_independent_stereo(pFlac, frameCountThisIteration, unusedBitsPerSample, pDecodedSamples0, pDecodedSamples1, pBufferOut); |
8259 | } break; |
8260 | } |
8261 | } else { |
8262 | /* Generic interleaving. */ |
8263 | drflac_uint64 i; |
8264 | for (i = 0; i < frameCountThisIteration; ++i) { |
8265 | unsigned int j; |
8266 | for (j = 0; j < channelCount; ++j) { |
8267 | pBufferOut[(i*channelCount)+j] = (drflac_int32)((drflac_uint32)(pFlac->currentFLACFrame.subframes[j].pSamplesS32[iFirstPCMFrame + i]) << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[j].wastedBitsPerSample)); |
8268 | } |
8269 | } |
8270 | } |
8271 | |
8272 | framesRead += frameCountThisIteration; |
8273 | pBufferOut += frameCountThisIteration * channelCount; |
8274 | framesToRead -= frameCountThisIteration; |
8275 | pFlac->currentPCMFrame += frameCountThisIteration; |
8276 | pFlac->currentFLACFrame.pcmFramesRemaining -= (drflac_uint32)frameCountThisIteration; |
8277 | } |
8278 | } |
8279 | |
8280 | return framesRead; |
8281 | } |
8282 | |
2ff0b512 |
8283 | 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) |
8284 | { |
8285 | drflac_uint64 i; |
8286 | drflac_uint64 frameCount4 = frameCount >> 2; |
8287 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
8288 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
8289 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
8290 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
8291 | |
8292 | for (i = 0; i < frameCount4; ++i) { |
8293 | drflac_uint32 left0 = pInputSamples0U32[i*4+0] << shift0; |
8294 | drflac_uint32 left1 = pInputSamples0U32[i*4+1] << shift0; |
8295 | drflac_uint32 left2 = pInputSamples0U32[i*4+2] << shift0; |
8296 | drflac_uint32 left3 = pInputSamples0U32[i*4+3] << shift0; |
8297 | |
8298 | drflac_uint32 side0 = pInputSamples1U32[i*4+0] << shift1; |
8299 | drflac_uint32 side1 = pInputSamples1U32[i*4+1] << shift1; |
8300 | drflac_uint32 side2 = pInputSamples1U32[i*4+2] << shift1; |
8301 | drflac_uint32 side3 = pInputSamples1U32[i*4+3] << shift1; |
8302 | |
8303 | drflac_uint32 right0 = left0 - side0; |
8304 | drflac_uint32 right1 = left1 - side1; |
8305 | drflac_uint32 right2 = left2 - side2; |
8306 | drflac_uint32 right3 = left3 - side3; |
8307 | |
8308 | left0 >>= 16; |
8309 | left1 >>= 16; |
8310 | left2 >>= 16; |
8311 | left3 >>= 16; |
8312 | |
8313 | right0 >>= 16; |
8314 | right1 >>= 16; |
8315 | right2 >>= 16; |
8316 | right3 >>= 16; |
8317 | |
8318 | pOutputSamples[i*8+0] = (drflac_int16)left0; |
8319 | pOutputSamples[i*8+1] = (drflac_int16)right0; |
8320 | pOutputSamples[i*8+2] = (drflac_int16)left1; |
8321 | pOutputSamples[i*8+3] = (drflac_int16)right1; |
8322 | pOutputSamples[i*8+4] = (drflac_int16)left2; |
8323 | pOutputSamples[i*8+5] = (drflac_int16)right2; |
8324 | pOutputSamples[i*8+6] = (drflac_int16)left3; |
8325 | pOutputSamples[i*8+7] = (drflac_int16)right3; |
8326 | } |
8327 | |
8328 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
8329 | drflac_uint32 left = pInputSamples0U32[i] << shift0; |
8330 | drflac_uint32 side = pInputSamples1U32[i] << shift1; |
8331 | drflac_uint32 right = left - side; |
8332 | |
8333 | left >>= 16; |
8334 | right >>= 16; |
8335 | |
8336 | pOutputSamples[i*2+0] = (drflac_int16)left; |
8337 | pOutputSamples[i*2+1] = (drflac_int16)right; |
8338 | } |
8339 | } |
8340 | |
8341 | #if defined(DRFLAC_SUPPORT_SSE2) |
8342 | 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) |
8343 | { |
8344 | drflac_uint64 i; |
8345 | drflac_uint64 frameCount4 = frameCount >> 2; |
8346 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
8347 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
8348 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
8349 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
8350 | |
8351 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
8352 | |
8353 | for (i = 0; i < frameCount4; ++i) { |
8354 | __m128i left = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), shift0); |
8355 | __m128i side = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), shift1); |
8356 | __m128i right = _mm_sub_epi32(left, side); |
8357 | |
8358 | left = _mm_srai_epi32(left, 16); |
8359 | right = _mm_srai_epi32(right, 16); |
8360 | |
8361 | _mm_storeu_si128((__m128i*)(pOutputSamples + i*8), drflac__mm_packs_interleaved_epi32(left, right)); |
8362 | } |
8363 | |
8364 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
8365 | drflac_uint32 left = pInputSamples0U32[i] << shift0; |
8366 | drflac_uint32 side = pInputSamples1U32[i] << shift1; |
8367 | drflac_uint32 right = left - side; |
8368 | |
8369 | left >>= 16; |
8370 | right >>= 16; |
8371 | |
8372 | pOutputSamples[i*2+0] = (drflac_int16)left; |
8373 | pOutputSamples[i*2+1] = (drflac_int16)right; |
8374 | } |
8375 | } |
8376 | #endif |
8377 | |
8378 | #if defined(DRFLAC_SUPPORT_NEON) |
8379 | 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) |
8380 | { |
8381 | drflac_uint64 i; |
8382 | drflac_uint64 frameCount4 = frameCount >> 2; |
8383 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
8384 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
8385 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
8386 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
8387 | int32x4_t shift0_4; |
8388 | int32x4_t shift1_4; |
8389 | |
8390 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
8391 | |
8392 | shift0_4 = vdupq_n_s32(shift0); |
8393 | shift1_4 = vdupq_n_s32(shift1); |
8394 | |
8395 | for (i = 0; i < frameCount4; ++i) { |
8396 | uint32x4_t left; |
8397 | uint32x4_t side; |
8398 | uint32x4_t right; |
8399 | |
8400 | left = vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), shift0_4); |
8401 | side = vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), shift1_4); |
8402 | right = vsubq_u32(left, side); |
8403 | |
8404 | left = vshrq_n_u32(left, 16); |
8405 | right = vshrq_n_u32(right, 16); |
8406 | |
8407 | drflac__vst2q_u16((drflac_uint16*)pOutputSamples + i*8, vzip_u16(vmovn_u32(left), vmovn_u32(right))); |
8408 | } |
8409 | |
8410 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
8411 | drflac_uint32 left = pInputSamples0U32[i] << shift0; |
8412 | drflac_uint32 side = pInputSamples1U32[i] << shift1; |
8413 | drflac_uint32 right = left - side; |
8414 | |
8415 | left >>= 16; |
8416 | right >>= 16; |
8417 | |
8418 | pOutputSamples[i*2+0] = (drflac_int16)left; |
8419 | pOutputSamples[i*2+1] = (drflac_int16)right; |
8420 | } |
8421 | } |
8422 | #endif |
8423 | |
8424 | 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) |
8425 | { |
8426 | #if defined(DRFLAC_SUPPORT_SSE2) |
8427 | if (drflac__gIsSSE2Supported && pFlac->bitsPerSample <= 24) { |
8428 | drflac_read_pcm_frames_s16__decode_left_side__sse2(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
8429 | } else |
8430 | #elif defined(DRFLAC_SUPPORT_NEON) |
8431 | if (drflac__gIsNEONSupported && pFlac->bitsPerSample <= 24) { |
8432 | drflac_read_pcm_frames_s16__decode_left_side__neon(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
8433 | } else |
8434 | #endif |
8435 | { |
8436 | /* Scalar fallback. */ |
2ff0b512 |
8437 | drflac_read_pcm_frames_s16__decode_left_side__scalar(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
2ff0b512 |
8438 | } |
8439 | } |
8440 | |
8441 | |
2ff0b512 |
8442 | 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) |
8443 | { |
8444 | drflac_uint64 i; |
8445 | drflac_uint64 frameCount4 = frameCount >> 2; |
8446 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
8447 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
8448 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
8449 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
8450 | |
8451 | for (i = 0; i < frameCount4; ++i) { |
8452 | drflac_uint32 side0 = pInputSamples0U32[i*4+0] << shift0; |
8453 | drflac_uint32 side1 = pInputSamples0U32[i*4+1] << shift0; |
8454 | drflac_uint32 side2 = pInputSamples0U32[i*4+2] << shift0; |
8455 | drflac_uint32 side3 = pInputSamples0U32[i*4+3] << shift0; |
8456 | |
8457 | drflac_uint32 right0 = pInputSamples1U32[i*4+0] << shift1; |
8458 | drflac_uint32 right1 = pInputSamples1U32[i*4+1] << shift1; |
8459 | drflac_uint32 right2 = pInputSamples1U32[i*4+2] << shift1; |
8460 | drflac_uint32 right3 = pInputSamples1U32[i*4+3] << shift1; |
8461 | |
8462 | drflac_uint32 left0 = right0 + side0; |
8463 | drflac_uint32 left1 = right1 + side1; |
8464 | drflac_uint32 left2 = right2 + side2; |
8465 | drflac_uint32 left3 = right3 + side3; |
8466 | |
8467 | left0 >>= 16; |
8468 | left1 >>= 16; |
8469 | left2 >>= 16; |
8470 | left3 >>= 16; |
8471 | |
8472 | right0 >>= 16; |
8473 | right1 >>= 16; |
8474 | right2 >>= 16; |
8475 | right3 >>= 16; |
8476 | |
8477 | pOutputSamples[i*8+0] = (drflac_int16)left0; |
8478 | pOutputSamples[i*8+1] = (drflac_int16)right0; |
8479 | pOutputSamples[i*8+2] = (drflac_int16)left1; |
8480 | pOutputSamples[i*8+3] = (drflac_int16)right1; |
8481 | pOutputSamples[i*8+4] = (drflac_int16)left2; |
8482 | pOutputSamples[i*8+5] = (drflac_int16)right2; |
8483 | pOutputSamples[i*8+6] = (drflac_int16)left3; |
8484 | pOutputSamples[i*8+7] = (drflac_int16)right3; |
8485 | } |
8486 | |
8487 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
8488 | drflac_uint32 side = pInputSamples0U32[i] << shift0; |
8489 | drflac_uint32 right = pInputSamples1U32[i] << shift1; |
8490 | drflac_uint32 left = right + side; |
8491 | |
8492 | left >>= 16; |
8493 | right >>= 16; |
8494 | |
8495 | pOutputSamples[i*2+0] = (drflac_int16)left; |
8496 | pOutputSamples[i*2+1] = (drflac_int16)right; |
8497 | } |
8498 | } |
8499 | |
8500 | #if defined(DRFLAC_SUPPORT_SSE2) |
8501 | 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) |
8502 | { |
8503 | drflac_uint64 i; |
8504 | drflac_uint64 frameCount4 = frameCount >> 2; |
8505 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
8506 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
8507 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
8508 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
8509 | |
8510 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
8511 | |
8512 | for (i = 0; i < frameCount4; ++i) { |
8513 | __m128i side = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), shift0); |
8514 | __m128i right = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), shift1); |
8515 | __m128i left = _mm_add_epi32(right, side); |
8516 | |
8517 | left = _mm_srai_epi32(left, 16); |
8518 | right = _mm_srai_epi32(right, 16); |
8519 | |
8520 | _mm_storeu_si128((__m128i*)(pOutputSamples + i*8), drflac__mm_packs_interleaved_epi32(left, right)); |
8521 | } |
8522 | |
8523 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
8524 | drflac_uint32 side = pInputSamples0U32[i] << shift0; |
8525 | drflac_uint32 right = pInputSamples1U32[i] << shift1; |
8526 | drflac_uint32 left = right + side; |
8527 | |
8528 | left >>= 16; |
8529 | right >>= 16; |
8530 | |
8531 | pOutputSamples[i*2+0] = (drflac_int16)left; |
8532 | pOutputSamples[i*2+1] = (drflac_int16)right; |
8533 | } |
8534 | } |
8535 | #endif |
8536 | |
8537 | #if defined(DRFLAC_SUPPORT_NEON) |
8538 | 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) |
8539 | { |
8540 | drflac_uint64 i; |
8541 | drflac_uint64 frameCount4 = frameCount >> 2; |
8542 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
8543 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
8544 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
8545 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
8546 | int32x4_t shift0_4; |
8547 | int32x4_t shift1_4; |
8548 | |
8549 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
8550 | |
8551 | shift0_4 = vdupq_n_s32(shift0); |
8552 | shift1_4 = vdupq_n_s32(shift1); |
8553 | |
8554 | for (i = 0; i < frameCount4; ++i) { |
8555 | uint32x4_t side; |
8556 | uint32x4_t right; |
8557 | uint32x4_t left; |
8558 | |
8559 | side = vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), shift0_4); |
8560 | right = vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), shift1_4); |
8561 | left = vaddq_u32(right, side); |
8562 | |
8563 | left = vshrq_n_u32(left, 16); |
8564 | right = vshrq_n_u32(right, 16); |
8565 | |
8566 | drflac__vst2q_u16((drflac_uint16*)pOutputSamples + i*8, vzip_u16(vmovn_u32(left), vmovn_u32(right))); |
8567 | } |
8568 | |
8569 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
8570 | drflac_uint32 side = pInputSamples0U32[i] << shift0; |
8571 | drflac_uint32 right = pInputSamples1U32[i] << shift1; |
8572 | drflac_uint32 left = right + side; |
8573 | |
8574 | left >>= 16; |
8575 | right >>= 16; |
8576 | |
8577 | pOutputSamples[i*2+0] = (drflac_int16)left; |
8578 | pOutputSamples[i*2+1] = (drflac_int16)right; |
8579 | } |
8580 | } |
8581 | #endif |
8582 | |
8583 | 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) |
8584 | { |
8585 | #if defined(DRFLAC_SUPPORT_SSE2) |
8586 | if (drflac__gIsSSE2Supported && pFlac->bitsPerSample <= 24) { |
8587 | drflac_read_pcm_frames_s16__decode_right_side__sse2(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
8588 | } else |
8589 | #elif defined(DRFLAC_SUPPORT_NEON) |
8590 | if (drflac__gIsNEONSupported && pFlac->bitsPerSample <= 24) { |
8591 | drflac_read_pcm_frames_s16__decode_right_side__neon(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
8592 | } else |
8593 | #endif |
8594 | { |
8595 | /* Scalar fallback. */ |
2ff0b512 |
8596 | drflac_read_pcm_frames_s16__decode_right_side__scalar(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
2ff0b512 |
8597 | } |
8598 | } |
8599 | |
8600 | |
2ff0b512 |
8601 | |
8602 | 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) |
8603 | { |
8604 | drflac_uint64 i; |
8605 | drflac_uint64 frameCount4 = frameCount >> 2; |
8606 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
8607 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
8608 | drflac_uint32 shift = unusedBitsPerSample; |
8609 | |
8610 | if (shift > 0) { |
8611 | shift -= 1; |
8612 | for (i = 0; i < frameCount4; ++i) { |
8613 | drflac_uint32 temp0L; |
8614 | drflac_uint32 temp1L; |
8615 | drflac_uint32 temp2L; |
8616 | drflac_uint32 temp3L; |
8617 | drflac_uint32 temp0R; |
8618 | drflac_uint32 temp1R; |
8619 | drflac_uint32 temp2R; |
8620 | drflac_uint32 temp3R; |
8621 | |
8622 | drflac_uint32 mid0 = pInputSamples0U32[i*4+0] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
8623 | drflac_uint32 mid1 = pInputSamples0U32[i*4+1] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
8624 | drflac_uint32 mid2 = pInputSamples0U32[i*4+2] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
8625 | drflac_uint32 mid3 = pInputSamples0U32[i*4+3] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
8626 | |
8627 | drflac_uint32 side0 = pInputSamples1U32[i*4+0] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
8628 | drflac_uint32 side1 = pInputSamples1U32[i*4+1] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
8629 | drflac_uint32 side2 = pInputSamples1U32[i*4+2] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
8630 | drflac_uint32 side3 = pInputSamples1U32[i*4+3] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
8631 | |
8632 | mid0 = (mid0 << 1) | (side0 & 0x01); |
8633 | mid1 = (mid1 << 1) | (side1 & 0x01); |
8634 | mid2 = (mid2 << 1) | (side2 & 0x01); |
8635 | mid3 = (mid3 << 1) | (side3 & 0x01); |
8636 | |
8637 | temp0L = (mid0 + side0) << shift; |
8638 | temp1L = (mid1 + side1) << shift; |
8639 | temp2L = (mid2 + side2) << shift; |
8640 | temp3L = (mid3 + side3) << shift; |
8641 | |
8642 | temp0R = (mid0 - side0) << shift; |
8643 | temp1R = (mid1 - side1) << shift; |
8644 | temp2R = (mid2 - side2) << shift; |
8645 | temp3R = (mid3 - side3) << shift; |
8646 | |
8647 | temp0L >>= 16; |
8648 | temp1L >>= 16; |
8649 | temp2L >>= 16; |
8650 | temp3L >>= 16; |
8651 | |
8652 | temp0R >>= 16; |
8653 | temp1R >>= 16; |
8654 | temp2R >>= 16; |
8655 | temp3R >>= 16; |
8656 | |
8657 | pOutputSamples[i*8+0] = (drflac_int16)temp0L; |
8658 | pOutputSamples[i*8+1] = (drflac_int16)temp0R; |
8659 | pOutputSamples[i*8+2] = (drflac_int16)temp1L; |
8660 | pOutputSamples[i*8+3] = (drflac_int16)temp1R; |
8661 | pOutputSamples[i*8+4] = (drflac_int16)temp2L; |
8662 | pOutputSamples[i*8+5] = (drflac_int16)temp2R; |
8663 | pOutputSamples[i*8+6] = (drflac_int16)temp3L; |
8664 | pOutputSamples[i*8+7] = (drflac_int16)temp3R; |
8665 | } |
8666 | } else { |
8667 | for (i = 0; i < frameCount4; ++i) { |
8668 | drflac_uint32 temp0L; |
8669 | drflac_uint32 temp1L; |
8670 | drflac_uint32 temp2L; |
8671 | drflac_uint32 temp3L; |
8672 | drflac_uint32 temp0R; |
8673 | drflac_uint32 temp1R; |
8674 | drflac_uint32 temp2R; |
8675 | drflac_uint32 temp3R; |
8676 | |
8677 | drflac_uint32 mid0 = pInputSamples0U32[i*4+0] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
8678 | drflac_uint32 mid1 = pInputSamples0U32[i*4+1] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
8679 | drflac_uint32 mid2 = pInputSamples0U32[i*4+2] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
8680 | drflac_uint32 mid3 = pInputSamples0U32[i*4+3] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
8681 | |
8682 | drflac_uint32 side0 = pInputSamples1U32[i*4+0] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
8683 | drflac_uint32 side1 = pInputSamples1U32[i*4+1] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
8684 | drflac_uint32 side2 = pInputSamples1U32[i*4+2] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
8685 | drflac_uint32 side3 = pInputSamples1U32[i*4+3] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
8686 | |
8687 | mid0 = (mid0 << 1) | (side0 & 0x01); |
8688 | mid1 = (mid1 << 1) | (side1 & 0x01); |
8689 | mid2 = (mid2 << 1) | (side2 & 0x01); |
8690 | mid3 = (mid3 << 1) | (side3 & 0x01); |
8691 | |
8692 | temp0L = ((drflac_int32)(mid0 + side0) >> 1); |
8693 | temp1L = ((drflac_int32)(mid1 + side1) >> 1); |
8694 | temp2L = ((drflac_int32)(mid2 + side2) >> 1); |
8695 | temp3L = ((drflac_int32)(mid3 + side3) >> 1); |
8696 | |
8697 | temp0R = ((drflac_int32)(mid0 - side0) >> 1); |
8698 | temp1R = ((drflac_int32)(mid1 - side1) >> 1); |
8699 | temp2R = ((drflac_int32)(mid2 - side2) >> 1); |
8700 | temp3R = ((drflac_int32)(mid3 - side3) >> 1); |
8701 | |
8702 | temp0L >>= 16; |
8703 | temp1L >>= 16; |
8704 | temp2L >>= 16; |
8705 | temp3L >>= 16; |
8706 | |
8707 | temp0R >>= 16; |
8708 | temp1R >>= 16; |
8709 | temp2R >>= 16; |
8710 | temp3R >>= 16; |
8711 | |
8712 | pOutputSamples[i*8+0] = (drflac_int16)temp0L; |
8713 | pOutputSamples[i*8+1] = (drflac_int16)temp0R; |
8714 | pOutputSamples[i*8+2] = (drflac_int16)temp1L; |
8715 | pOutputSamples[i*8+3] = (drflac_int16)temp1R; |
8716 | pOutputSamples[i*8+4] = (drflac_int16)temp2L; |
8717 | pOutputSamples[i*8+5] = (drflac_int16)temp2R; |
8718 | pOutputSamples[i*8+6] = (drflac_int16)temp3L; |
8719 | pOutputSamples[i*8+7] = (drflac_int16)temp3R; |
8720 | } |
8721 | } |
8722 | |
8723 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
8724 | drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
8725 | drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
8726 | |
8727 | mid = (mid << 1) | (side & 0x01); |
8728 | |
8729 | pOutputSamples[i*2+0] = (drflac_int16)(((drflac_uint32)((drflac_int32)(mid + side) >> 1) << unusedBitsPerSample) >> 16); |
8730 | pOutputSamples[i*2+1] = (drflac_int16)(((drflac_uint32)((drflac_int32)(mid - side) >> 1) << unusedBitsPerSample) >> 16); |
8731 | } |
8732 | } |
8733 | |
8734 | #if defined(DRFLAC_SUPPORT_SSE2) |
8735 | 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) |
8736 | { |
8737 | drflac_uint64 i; |
8738 | drflac_uint64 frameCount4 = frameCount >> 2; |
8739 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
8740 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
8741 | drflac_uint32 shift = unusedBitsPerSample; |
8742 | |
8743 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
8744 | |
8745 | if (shift == 0) { |
8746 | for (i = 0; i < frameCount4; ++i) { |
8747 | __m128i mid; |
8748 | __m128i side; |
8749 | __m128i left; |
8750 | __m128i right; |
8751 | |
8752 | mid = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); |
8753 | side = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); |
8754 | |
8755 | mid = _mm_or_si128(_mm_slli_epi32(mid, 1), _mm_and_si128(side, _mm_set1_epi32(0x01))); |
8756 | |
8757 | left = _mm_srai_epi32(_mm_add_epi32(mid, side), 1); |
8758 | right = _mm_srai_epi32(_mm_sub_epi32(mid, side), 1); |
8759 | |
8760 | left = _mm_srai_epi32(left, 16); |
8761 | right = _mm_srai_epi32(right, 16); |
8762 | |
8763 | _mm_storeu_si128((__m128i*)(pOutputSamples + i*8), drflac__mm_packs_interleaved_epi32(left, right)); |
8764 | } |
8765 | |
8766 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
8767 | drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
8768 | drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
8769 | |
8770 | mid = (mid << 1) | (side & 0x01); |
8771 | |
8772 | pOutputSamples[i*2+0] = (drflac_int16)(((drflac_int32)(mid + side) >> 1) >> 16); |
8773 | pOutputSamples[i*2+1] = (drflac_int16)(((drflac_int32)(mid - side) >> 1) >> 16); |
8774 | } |
8775 | } else { |
8776 | shift -= 1; |
8777 | for (i = 0; i < frameCount4; ++i) { |
8778 | __m128i mid; |
8779 | __m128i side; |
8780 | __m128i left; |
8781 | __m128i right; |
8782 | |
8783 | mid = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); |
8784 | side = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); |
8785 | |
8786 | mid = _mm_or_si128(_mm_slli_epi32(mid, 1), _mm_and_si128(side, _mm_set1_epi32(0x01))); |
8787 | |
8788 | left = _mm_slli_epi32(_mm_add_epi32(mid, side), shift); |
8789 | right = _mm_slli_epi32(_mm_sub_epi32(mid, side), shift); |
8790 | |
8791 | left = _mm_srai_epi32(left, 16); |
8792 | right = _mm_srai_epi32(right, 16); |
8793 | |
8794 | _mm_storeu_si128((__m128i*)(pOutputSamples + i*8), drflac__mm_packs_interleaved_epi32(left, right)); |
8795 | } |
8796 | |
8797 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
8798 | drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
8799 | drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
8800 | |
8801 | mid = (mid << 1) | (side & 0x01); |
8802 | |
8803 | pOutputSamples[i*2+0] = (drflac_int16)(((mid + side) << shift) >> 16); |
8804 | pOutputSamples[i*2+1] = (drflac_int16)(((mid - side) << shift) >> 16); |
8805 | } |
8806 | } |
8807 | } |
8808 | #endif |
8809 | |
8810 | #if defined(DRFLAC_SUPPORT_NEON) |
8811 | 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) |
8812 | { |
8813 | drflac_uint64 i; |
8814 | drflac_uint64 frameCount4 = frameCount >> 2; |
8815 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
8816 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
8817 | drflac_uint32 shift = unusedBitsPerSample; |
8818 | int32x4_t wbpsShift0_4; /* wbps = Wasted Bits Per Sample */ |
8819 | int32x4_t wbpsShift1_4; /* wbps = Wasted Bits Per Sample */ |
8820 | |
8821 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
8822 | |
8823 | wbpsShift0_4 = vdupq_n_s32(pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); |
8824 | wbpsShift1_4 = vdupq_n_s32(pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); |
8825 | |
8826 | if (shift == 0) { |
8827 | for (i = 0; i < frameCount4; ++i) { |
8828 | uint32x4_t mid; |
8829 | uint32x4_t side; |
8830 | int32x4_t left; |
8831 | int32x4_t right; |
8832 | |
8833 | mid = vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), wbpsShift0_4); |
8834 | side = vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), wbpsShift1_4); |
8835 | |
8836 | mid = vorrq_u32(vshlq_n_u32(mid, 1), vandq_u32(side, vdupq_n_u32(1))); |
8837 | |
8838 | left = vshrq_n_s32(vreinterpretq_s32_u32(vaddq_u32(mid, side)), 1); |
8839 | right = vshrq_n_s32(vreinterpretq_s32_u32(vsubq_u32(mid, side)), 1); |
8840 | |
8841 | left = vshrq_n_s32(left, 16); |
8842 | right = vshrq_n_s32(right, 16); |
8843 | |
8844 | drflac__vst2q_s16(pOutputSamples + i*8, vzip_s16(vmovn_s32(left), vmovn_s32(right))); |
8845 | } |
8846 | |
8847 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
8848 | drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
8849 | drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
8850 | |
8851 | mid = (mid << 1) | (side & 0x01); |
8852 | |
8853 | pOutputSamples[i*2+0] = (drflac_int16)(((drflac_int32)(mid + side) >> 1) >> 16); |
8854 | pOutputSamples[i*2+1] = (drflac_int16)(((drflac_int32)(mid - side) >> 1) >> 16); |
8855 | } |
8856 | } else { |
8857 | int32x4_t shift4; |
8858 | |
8859 | shift -= 1; |
8860 | shift4 = vdupq_n_s32(shift); |
8861 | |
8862 | for (i = 0; i < frameCount4; ++i) { |
8863 | uint32x4_t mid; |
8864 | uint32x4_t side; |
8865 | int32x4_t left; |
8866 | int32x4_t right; |
8867 | |
8868 | mid = vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), wbpsShift0_4); |
8869 | side = vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), wbpsShift1_4); |
8870 | |
8871 | mid = vorrq_u32(vshlq_n_u32(mid, 1), vandq_u32(side, vdupq_n_u32(1))); |
8872 | |
8873 | left = vreinterpretq_s32_u32(vshlq_u32(vaddq_u32(mid, side), shift4)); |
8874 | right = vreinterpretq_s32_u32(vshlq_u32(vsubq_u32(mid, side), shift4)); |
8875 | |
8876 | left = vshrq_n_s32(left, 16); |
8877 | right = vshrq_n_s32(right, 16); |
8878 | |
8879 | drflac__vst2q_s16(pOutputSamples + i*8, vzip_s16(vmovn_s32(left), vmovn_s32(right))); |
8880 | } |
8881 | |
8882 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
8883 | drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
8884 | drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
8885 | |
8886 | mid = (mid << 1) | (side & 0x01); |
8887 | |
8888 | pOutputSamples[i*2+0] = (drflac_int16)(((mid + side) << shift) >> 16); |
8889 | pOutputSamples[i*2+1] = (drflac_int16)(((mid - side) << shift) >> 16); |
8890 | } |
8891 | } |
8892 | } |
8893 | #endif |
8894 | |
8895 | 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) |
8896 | { |
8897 | #if defined(DRFLAC_SUPPORT_SSE2) |
8898 | if (drflac__gIsSSE2Supported && pFlac->bitsPerSample <= 24) { |
8899 | drflac_read_pcm_frames_s16__decode_mid_side__sse2(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
8900 | } else |
8901 | #elif defined(DRFLAC_SUPPORT_NEON) |
8902 | if (drflac__gIsNEONSupported && pFlac->bitsPerSample <= 24) { |
8903 | drflac_read_pcm_frames_s16__decode_mid_side__neon(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
8904 | } else |
8905 | #endif |
8906 | { |
8907 | /* Scalar fallback. */ |
2ff0b512 |
8908 | drflac_read_pcm_frames_s16__decode_mid_side__scalar(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
2ff0b512 |
8909 | } |
8910 | } |
2ff0b512 |
8911 | |
8912 | 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) |
8913 | { |
8914 | drflac_uint64 i; |
8915 | drflac_uint64 frameCount4 = frameCount >> 2; |
8916 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
8917 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
8918 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
8919 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
8920 | |
8921 | for (i = 0; i < frameCount4; ++i) { |
8922 | drflac_uint32 tempL0 = pInputSamples0U32[i*4+0] << shift0; |
8923 | drflac_uint32 tempL1 = pInputSamples0U32[i*4+1] << shift0; |
8924 | drflac_uint32 tempL2 = pInputSamples0U32[i*4+2] << shift0; |
8925 | drflac_uint32 tempL3 = pInputSamples0U32[i*4+3] << shift0; |
8926 | |
8927 | drflac_uint32 tempR0 = pInputSamples1U32[i*4+0] << shift1; |
8928 | drflac_uint32 tempR1 = pInputSamples1U32[i*4+1] << shift1; |
8929 | drflac_uint32 tempR2 = pInputSamples1U32[i*4+2] << shift1; |
8930 | drflac_uint32 tempR3 = pInputSamples1U32[i*4+3] << shift1; |
8931 | |
8932 | tempL0 >>= 16; |
8933 | tempL1 >>= 16; |
8934 | tempL2 >>= 16; |
8935 | tempL3 >>= 16; |
8936 | |
8937 | tempR0 >>= 16; |
8938 | tempR1 >>= 16; |
8939 | tempR2 >>= 16; |
8940 | tempR3 >>= 16; |
8941 | |
8942 | pOutputSamples[i*8+0] = (drflac_int16)tempL0; |
8943 | pOutputSamples[i*8+1] = (drflac_int16)tempR0; |
8944 | pOutputSamples[i*8+2] = (drflac_int16)tempL1; |
8945 | pOutputSamples[i*8+3] = (drflac_int16)tempR1; |
8946 | pOutputSamples[i*8+4] = (drflac_int16)tempL2; |
8947 | pOutputSamples[i*8+5] = (drflac_int16)tempR2; |
8948 | pOutputSamples[i*8+6] = (drflac_int16)tempL3; |
8949 | pOutputSamples[i*8+7] = (drflac_int16)tempR3; |
8950 | } |
8951 | |
8952 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
8953 | pOutputSamples[i*2+0] = (drflac_int16)((pInputSamples0U32[i] << shift0) >> 16); |
8954 | pOutputSamples[i*2+1] = (drflac_int16)((pInputSamples1U32[i] << shift1) >> 16); |
8955 | } |
8956 | } |
8957 | |
8958 | #if defined(DRFLAC_SUPPORT_SSE2) |
8959 | 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) |
8960 | { |
8961 | drflac_uint64 i; |
8962 | drflac_uint64 frameCount4 = frameCount >> 2; |
8963 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
8964 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
8965 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
8966 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
8967 | |
8968 | for (i = 0; i < frameCount4; ++i) { |
8969 | __m128i left = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), shift0); |
8970 | __m128i right = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), shift1); |
8971 | |
8972 | left = _mm_srai_epi32(left, 16); |
8973 | right = _mm_srai_epi32(right, 16); |
8974 | |
8975 | /* 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. */ |
8976 | _mm_storeu_si128((__m128i*)(pOutputSamples + i*8), drflac__mm_packs_interleaved_epi32(left, right)); |
8977 | } |
8978 | |
8979 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
8980 | pOutputSamples[i*2+0] = (drflac_int16)((pInputSamples0U32[i] << shift0) >> 16); |
8981 | pOutputSamples[i*2+1] = (drflac_int16)((pInputSamples1U32[i] << shift1) >> 16); |
8982 | } |
8983 | } |
8984 | #endif |
8985 | |
8986 | #if defined(DRFLAC_SUPPORT_NEON) |
8987 | 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) |
8988 | { |
8989 | drflac_uint64 i; |
8990 | drflac_uint64 frameCount4 = frameCount >> 2; |
8991 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
8992 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
8993 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
8994 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
8995 | |
8996 | int32x4_t shift0_4 = vdupq_n_s32(shift0); |
8997 | int32x4_t shift1_4 = vdupq_n_s32(shift1); |
8998 | |
8999 | for (i = 0; i < frameCount4; ++i) { |
9000 | int32x4_t left; |
9001 | int32x4_t right; |
9002 | |
9003 | left = vreinterpretq_s32_u32(vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), shift0_4)); |
9004 | right = vreinterpretq_s32_u32(vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), shift1_4)); |
9005 | |
9006 | left = vshrq_n_s32(left, 16); |
9007 | right = vshrq_n_s32(right, 16); |
9008 | |
9009 | drflac__vst2q_s16(pOutputSamples + i*8, vzip_s16(vmovn_s32(left), vmovn_s32(right))); |
9010 | } |
9011 | |
9012 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
9013 | pOutputSamples[i*2+0] = (drflac_int16)((pInputSamples0U32[i] << shift0) >> 16); |
9014 | pOutputSamples[i*2+1] = (drflac_int16)((pInputSamples1U32[i] << shift1) >> 16); |
9015 | } |
9016 | } |
9017 | #endif |
9018 | |
9019 | 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) |
9020 | { |
9021 | #if defined(DRFLAC_SUPPORT_SSE2) |
9022 | if (drflac__gIsSSE2Supported && pFlac->bitsPerSample <= 24) { |
9023 | drflac_read_pcm_frames_s16__decode_independent_stereo__sse2(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
9024 | } else |
9025 | #elif defined(DRFLAC_SUPPORT_NEON) |
9026 | if (drflac__gIsNEONSupported && pFlac->bitsPerSample <= 24) { |
9027 | drflac_read_pcm_frames_s16__decode_independent_stereo__neon(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
9028 | } else |
9029 | #endif |
9030 | { |
9031 | /* Scalar fallback. */ |
2ff0b512 |
9032 | drflac_read_pcm_frames_s16__decode_independent_stereo__scalar(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
2ff0b512 |
9033 | } |
9034 | } |
9035 | |
9036 | DRFLAC_API drflac_uint64 drflac_read_pcm_frames_s16(drflac* pFlac, drflac_uint64 framesToRead, drflac_int16* pBufferOut) |
9037 | { |
9038 | drflac_uint64 framesRead; |
9039 | drflac_uint32 unusedBitsPerSample; |
9040 | |
9041 | if (pFlac == NULL || framesToRead == 0) { |
9042 | return 0; |
9043 | } |
9044 | |
9045 | if (pBufferOut == NULL) { |
9046 | return drflac__seek_forward_by_pcm_frames(pFlac, framesToRead); |
9047 | } |
9048 | |
9049 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 32); |
9050 | unusedBitsPerSample = 32 - pFlac->bitsPerSample; |
9051 | |
9052 | framesRead = 0; |
9053 | while (framesToRead > 0) { |
9054 | /* If we've run out of samples in this frame, go to the next. */ |
9055 | if (pFlac->currentFLACFrame.pcmFramesRemaining == 0) { |
9056 | if (!drflac__read_and_decode_next_flac_frame(pFlac)) { |
9057 | break; /* Couldn't read the next frame, so just break from the loop and return. */ |
9058 | } |
9059 | } else { |
9060 | unsigned int channelCount = drflac__get_channel_count_from_channel_assignment(pFlac->currentFLACFrame.header.channelAssignment); |
9061 | drflac_uint64 iFirstPCMFrame = pFlac->currentFLACFrame.header.blockSizeInPCMFrames - pFlac->currentFLACFrame.pcmFramesRemaining; |
9062 | drflac_uint64 frameCountThisIteration = framesToRead; |
9063 | |
9064 | if (frameCountThisIteration > pFlac->currentFLACFrame.pcmFramesRemaining) { |
9065 | frameCountThisIteration = pFlac->currentFLACFrame.pcmFramesRemaining; |
9066 | } |
9067 | |
9068 | if (channelCount == 2) { |
9069 | const drflac_int32* pDecodedSamples0 = pFlac->currentFLACFrame.subframes[0].pSamplesS32 + iFirstPCMFrame; |
9070 | const drflac_int32* pDecodedSamples1 = pFlac->currentFLACFrame.subframes[1].pSamplesS32 + iFirstPCMFrame; |
9071 | |
9072 | switch (pFlac->currentFLACFrame.header.channelAssignment) |
9073 | { |
9074 | case DRFLAC_CHANNEL_ASSIGNMENT_LEFT_SIDE: |
9075 | { |
9076 | drflac_read_pcm_frames_s16__decode_left_side(pFlac, frameCountThisIteration, unusedBitsPerSample, pDecodedSamples0, pDecodedSamples1, pBufferOut); |
9077 | } break; |
9078 | |
9079 | case DRFLAC_CHANNEL_ASSIGNMENT_RIGHT_SIDE: |
9080 | { |
9081 | drflac_read_pcm_frames_s16__decode_right_side(pFlac, frameCountThisIteration, unusedBitsPerSample, pDecodedSamples0, pDecodedSamples1, pBufferOut); |
9082 | } break; |
9083 | |
9084 | case DRFLAC_CHANNEL_ASSIGNMENT_MID_SIDE: |
9085 | { |
9086 | drflac_read_pcm_frames_s16__decode_mid_side(pFlac, frameCountThisIteration, unusedBitsPerSample, pDecodedSamples0, pDecodedSamples1, pBufferOut); |
9087 | } break; |
9088 | |
9089 | case DRFLAC_CHANNEL_ASSIGNMENT_INDEPENDENT: |
9090 | default: |
9091 | { |
9092 | drflac_read_pcm_frames_s16__decode_independent_stereo(pFlac, frameCountThisIteration, unusedBitsPerSample, pDecodedSamples0, pDecodedSamples1, pBufferOut); |
9093 | } break; |
9094 | } |
9095 | } else { |
9096 | /* Generic interleaving. */ |
9097 | drflac_uint64 i; |
9098 | for (i = 0; i < frameCountThisIteration; ++i) { |
9099 | unsigned int j; |
9100 | for (j = 0; j < channelCount; ++j) { |
9101 | drflac_int32 sampleS32 = (drflac_int32)((drflac_uint32)(pFlac->currentFLACFrame.subframes[j].pSamplesS32[iFirstPCMFrame + i]) << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[j].wastedBitsPerSample)); |
9102 | pBufferOut[(i*channelCount)+j] = (drflac_int16)(sampleS32 >> 16); |
9103 | } |
9104 | } |
9105 | } |
9106 | |
9107 | framesRead += frameCountThisIteration; |
9108 | pBufferOut += frameCountThisIteration * channelCount; |
9109 | framesToRead -= frameCountThisIteration; |
9110 | pFlac->currentPCMFrame += frameCountThisIteration; |
9111 | pFlac->currentFLACFrame.pcmFramesRemaining -= (drflac_uint32)frameCountThisIteration; |
9112 | } |
9113 | } |
9114 | |
9115 | return framesRead; |
9116 | } |
9117 | |
2ff0b512 |
9118 | 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) |
9119 | { |
9120 | drflac_uint64 i; |
9121 | drflac_uint64 frameCount4 = frameCount >> 2; |
9122 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
9123 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
9124 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
9125 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
9126 | |
9127 | float factor = 1 / 2147483648.0; |
9128 | |
9129 | for (i = 0; i < frameCount4; ++i) { |
9130 | drflac_uint32 left0 = pInputSamples0U32[i*4+0] << shift0; |
9131 | drflac_uint32 left1 = pInputSamples0U32[i*4+1] << shift0; |
9132 | drflac_uint32 left2 = pInputSamples0U32[i*4+2] << shift0; |
9133 | drflac_uint32 left3 = pInputSamples0U32[i*4+3] << shift0; |
9134 | |
9135 | drflac_uint32 side0 = pInputSamples1U32[i*4+0] << shift1; |
9136 | drflac_uint32 side1 = pInputSamples1U32[i*4+1] << shift1; |
9137 | drflac_uint32 side2 = pInputSamples1U32[i*4+2] << shift1; |
9138 | drflac_uint32 side3 = pInputSamples1U32[i*4+3] << shift1; |
9139 | |
9140 | drflac_uint32 right0 = left0 - side0; |
9141 | drflac_uint32 right1 = left1 - side1; |
9142 | drflac_uint32 right2 = left2 - side2; |
9143 | drflac_uint32 right3 = left3 - side3; |
9144 | |
9145 | pOutputSamples[i*8+0] = (drflac_int32)left0 * factor; |
9146 | pOutputSamples[i*8+1] = (drflac_int32)right0 * factor; |
9147 | pOutputSamples[i*8+2] = (drflac_int32)left1 * factor; |
9148 | pOutputSamples[i*8+3] = (drflac_int32)right1 * factor; |
9149 | pOutputSamples[i*8+4] = (drflac_int32)left2 * factor; |
9150 | pOutputSamples[i*8+5] = (drflac_int32)right2 * factor; |
9151 | pOutputSamples[i*8+6] = (drflac_int32)left3 * factor; |
9152 | pOutputSamples[i*8+7] = (drflac_int32)right3 * factor; |
9153 | } |
9154 | |
9155 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
9156 | drflac_uint32 left = pInputSamples0U32[i] << shift0; |
9157 | drflac_uint32 side = pInputSamples1U32[i] << shift1; |
9158 | drflac_uint32 right = left - side; |
9159 | |
9160 | pOutputSamples[i*2+0] = (drflac_int32)left * factor; |
9161 | pOutputSamples[i*2+1] = (drflac_int32)right * factor; |
9162 | } |
9163 | } |
9164 | |
9165 | #if defined(DRFLAC_SUPPORT_SSE2) |
9166 | 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) |
9167 | { |
9168 | drflac_uint64 i; |
9169 | drflac_uint64 frameCount4 = frameCount >> 2; |
9170 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
9171 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
9172 | drflac_uint32 shift0 = (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample) - 8; |
9173 | drflac_uint32 shift1 = (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample) - 8; |
9174 | __m128 factor; |
9175 | |
9176 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
9177 | |
9178 | factor = _mm_set1_ps(1.0f / 8388608.0f); |
9179 | |
9180 | for (i = 0; i < frameCount4; ++i) { |
9181 | __m128i left = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), shift0); |
9182 | __m128i side = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), shift1); |
9183 | __m128i right = _mm_sub_epi32(left, side); |
9184 | __m128 leftf = _mm_mul_ps(_mm_cvtepi32_ps(left), factor); |
9185 | __m128 rightf = _mm_mul_ps(_mm_cvtepi32_ps(right), factor); |
9186 | |
9187 | _mm_storeu_ps(pOutputSamples + i*8 + 0, _mm_unpacklo_ps(leftf, rightf)); |
9188 | _mm_storeu_ps(pOutputSamples + i*8 + 4, _mm_unpackhi_ps(leftf, rightf)); |
9189 | } |
9190 | |
9191 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
9192 | drflac_uint32 left = pInputSamples0U32[i] << shift0; |
9193 | drflac_uint32 side = pInputSamples1U32[i] << shift1; |
9194 | drflac_uint32 right = left - side; |
9195 | |
9196 | pOutputSamples[i*2+0] = (drflac_int32)left / 8388608.0f; |
9197 | pOutputSamples[i*2+1] = (drflac_int32)right / 8388608.0f; |
9198 | } |
9199 | } |
9200 | #endif |
9201 | |
9202 | #if defined(DRFLAC_SUPPORT_NEON) |
9203 | 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) |
9204 | { |
9205 | drflac_uint64 i; |
9206 | drflac_uint64 frameCount4 = frameCount >> 2; |
9207 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
9208 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
9209 | drflac_uint32 shift0 = (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample) - 8; |
9210 | drflac_uint32 shift1 = (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample) - 8; |
9211 | float32x4_t factor4; |
9212 | int32x4_t shift0_4; |
9213 | int32x4_t shift1_4; |
9214 | |
9215 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
9216 | |
9217 | factor4 = vdupq_n_f32(1.0f / 8388608.0f); |
9218 | shift0_4 = vdupq_n_s32(shift0); |
9219 | shift1_4 = vdupq_n_s32(shift1); |
9220 | |
9221 | for (i = 0; i < frameCount4; ++i) { |
9222 | uint32x4_t left; |
9223 | uint32x4_t side; |
9224 | uint32x4_t right; |
9225 | float32x4_t leftf; |
9226 | float32x4_t rightf; |
9227 | |
9228 | left = vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), shift0_4); |
9229 | side = vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), shift1_4); |
9230 | right = vsubq_u32(left, side); |
9231 | leftf = vmulq_f32(vcvtq_f32_s32(vreinterpretq_s32_u32(left)), factor4); |
9232 | rightf = vmulq_f32(vcvtq_f32_s32(vreinterpretq_s32_u32(right)), factor4); |
9233 | |
9234 | drflac__vst2q_f32(pOutputSamples + i*8, vzipq_f32(leftf, rightf)); |
9235 | } |
9236 | |
9237 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
9238 | drflac_uint32 left = pInputSamples0U32[i] << shift0; |
9239 | drflac_uint32 side = pInputSamples1U32[i] << shift1; |
9240 | drflac_uint32 right = left - side; |
9241 | |
9242 | pOutputSamples[i*2+0] = (drflac_int32)left / 8388608.0f; |
9243 | pOutputSamples[i*2+1] = (drflac_int32)right / 8388608.0f; |
9244 | } |
9245 | } |
9246 | #endif |
9247 | |
9248 | 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) |
9249 | { |
9250 | #if defined(DRFLAC_SUPPORT_SSE2) |
9251 | if (drflac__gIsSSE2Supported && pFlac->bitsPerSample <= 24) { |
9252 | drflac_read_pcm_frames_f32__decode_left_side__sse2(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
9253 | } else |
9254 | #elif defined(DRFLAC_SUPPORT_NEON) |
9255 | if (drflac__gIsNEONSupported && pFlac->bitsPerSample <= 24) { |
9256 | drflac_read_pcm_frames_f32__decode_left_side__neon(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
9257 | } else |
9258 | #endif |
9259 | { |
9260 | /* Scalar fallback. */ |
2ff0b512 |
9261 | drflac_read_pcm_frames_f32__decode_left_side__scalar(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
2ff0b512 |
9262 | } |
9263 | } |
9264 | |
9265 | |
2ff0b512 |
9266 | 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) |
9267 | { |
9268 | drflac_uint64 i; |
9269 | drflac_uint64 frameCount4 = frameCount >> 2; |
9270 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
9271 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
9272 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
9273 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
9274 | float factor = 1 / 2147483648.0; |
9275 | |
9276 | for (i = 0; i < frameCount4; ++i) { |
9277 | drflac_uint32 side0 = pInputSamples0U32[i*4+0] << shift0; |
9278 | drflac_uint32 side1 = pInputSamples0U32[i*4+1] << shift0; |
9279 | drflac_uint32 side2 = pInputSamples0U32[i*4+2] << shift0; |
9280 | drflac_uint32 side3 = pInputSamples0U32[i*4+3] << shift0; |
9281 | |
9282 | drflac_uint32 right0 = pInputSamples1U32[i*4+0] << shift1; |
9283 | drflac_uint32 right1 = pInputSamples1U32[i*4+1] << shift1; |
9284 | drflac_uint32 right2 = pInputSamples1U32[i*4+2] << shift1; |
9285 | drflac_uint32 right3 = pInputSamples1U32[i*4+3] << shift1; |
9286 | |
9287 | drflac_uint32 left0 = right0 + side0; |
9288 | drflac_uint32 left1 = right1 + side1; |
9289 | drflac_uint32 left2 = right2 + side2; |
9290 | drflac_uint32 left3 = right3 + side3; |
9291 | |
9292 | pOutputSamples[i*8+0] = (drflac_int32)left0 * factor; |
9293 | pOutputSamples[i*8+1] = (drflac_int32)right0 * factor; |
9294 | pOutputSamples[i*8+2] = (drflac_int32)left1 * factor; |
9295 | pOutputSamples[i*8+3] = (drflac_int32)right1 * factor; |
9296 | pOutputSamples[i*8+4] = (drflac_int32)left2 * factor; |
9297 | pOutputSamples[i*8+5] = (drflac_int32)right2 * factor; |
9298 | pOutputSamples[i*8+6] = (drflac_int32)left3 * factor; |
9299 | pOutputSamples[i*8+7] = (drflac_int32)right3 * factor; |
9300 | } |
9301 | |
9302 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
9303 | drflac_uint32 side = pInputSamples0U32[i] << shift0; |
9304 | drflac_uint32 right = pInputSamples1U32[i] << shift1; |
9305 | drflac_uint32 left = right + side; |
9306 | |
9307 | pOutputSamples[i*2+0] = (drflac_int32)left * factor; |
9308 | pOutputSamples[i*2+1] = (drflac_int32)right * factor; |
9309 | } |
9310 | } |
9311 | |
9312 | #if defined(DRFLAC_SUPPORT_SSE2) |
9313 | 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) |
9314 | { |
9315 | drflac_uint64 i; |
9316 | drflac_uint64 frameCount4 = frameCount >> 2; |
9317 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
9318 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
9319 | drflac_uint32 shift0 = (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample) - 8; |
9320 | drflac_uint32 shift1 = (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample) - 8; |
9321 | __m128 factor; |
9322 | |
9323 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
9324 | |
9325 | factor = _mm_set1_ps(1.0f / 8388608.0f); |
9326 | |
9327 | for (i = 0; i < frameCount4; ++i) { |
9328 | __m128i side = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), shift0); |
9329 | __m128i right = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), shift1); |
9330 | __m128i left = _mm_add_epi32(right, side); |
9331 | __m128 leftf = _mm_mul_ps(_mm_cvtepi32_ps(left), factor); |
9332 | __m128 rightf = _mm_mul_ps(_mm_cvtepi32_ps(right), factor); |
9333 | |
9334 | _mm_storeu_ps(pOutputSamples + i*8 + 0, _mm_unpacklo_ps(leftf, rightf)); |
9335 | _mm_storeu_ps(pOutputSamples + i*8 + 4, _mm_unpackhi_ps(leftf, rightf)); |
9336 | } |
9337 | |
9338 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
9339 | drflac_uint32 side = pInputSamples0U32[i] << shift0; |
9340 | drflac_uint32 right = pInputSamples1U32[i] << shift1; |
9341 | drflac_uint32 left = right + side; |
9342 | |
9343 | pOutputSamples[i*2+0] = (drflac_int32)left / 8388608.0f; |
9344 | pOutputSamples[i*2+1] = (drflac_int32)right / 8388608.0f; |
9345 | } |
9346 | } |
9347 | #endif |
9348 | |
9349 | #if defined(DRFLAC_SUPPORT_NEON) |
9350 | 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) |
9351 | { |
9352 | drflac_uint64 i; |
9353 | drflac_uint64 frameCount4 = frameCount >> 2; |
9354 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
9355 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
9356 | drflac_uint32 shift0 = (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample) - 8; |
9357 | drflac_uint32 shift1 = (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample) - 8; |
9358 | float32x4_t factor4; |
9359 | int32x4_t shift0_4; |
9360 | int32x4_t shift1_4; |
9361 | |
9362 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
9363 | |
9364 | factor4 = vdupq_n_f32(1.0f / 8388608.0f); |
9365 | shift0_4 = vdupq_n_s32(shift0); |
9366 | shift1_4 = vdupq_n_s32(shift1); |
9367 | |
9368 | for (i = 0; i < frameCount4; ++i) { |
9369 | uint32x4_t side; |
9370 | uint32x4_t right; |
9371 | uint32x4_t left; |
9372 | float32x4_t leftf; |
9373 | float32x4_t rightf; |
9374 | |
9375 | side = vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), shift0_4); |
9376 | right = vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), shift1_4); |
9377 | left = vaddq_u32(right, side); |
9378 | leftf = vmulq_f32(vcvtq_f32_s32(vreinterpretq_s32_u32(left)), factor4); |
9379 | rightf = vmulq_f32(vcvtq_f32_s32(vreinterpretq_s32_u32(right)), factor4); |
9380 | |
9381 | drflac__vst2q_f32(pOutputSamples + i*8, vzipq_f32(leftf, rightf)); |
9382 | } |
9383 | |
9384 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
9385 | drflac_uint32 side = pInputSamples0U32[i] << shift0; |
9386 | drflac_uint32 right = pInputSamples1U32[i] << shift1; |
9387 | drflac_uint32 left = right + side; |
9388 | |
9389 | pOutputSamples[i*2+0] = (drflac_int32)left / 8388608.0f; |
9390 | pOutputSamples[i*2+1] = (drflac_int32)right / 8388608.0f; |
9391 | } |
9392 | } |
9393 | #endif |
9394 | |
9395 | 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) |
9396 | { |
9397 | #if defined(DRFLAC_SUPPORT_SSE2) |
9398 | if (drflac__gIsSSE2Supported && pFlac->bitsPerSample <= 24) { |
9399 | drflac_read_pcm_frames_f32__decode_right_side__sse2(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
9400 | } else |
9401 | #elif defined(DRFLAC_SUPPORT_NEON) |
9402 | if (drflac__gIsNEONSupported && pFlac->bitsPerSample <= 24) { |
9403 | drflac_read_pcm_frames_f32__decode_right_side__neon(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
9404 | } else |
9405 | #endif |
9406 | { |
9407 | /* Scalar fallback. */ |
2ff0b512 |
9408 | drflac_read_pcm_frames_f32__decode_right_side__scalar(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
2ff0b512 |
9409 | } |
9410 | } |
2ff0b512 |
9411 | |
9412 | 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) |
9413 | { |
9414 | drflac_uint64 i; |
9415 | drflac_uint64 frameCount4 = frameCount >> 2; |
9416 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
9417 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
9418 | drflac_uint32 shift = unusedBitsPerSample; |
9419 | float factor = 1 / 2147483648.0; |
9420 | |
9421 | if (shift > 0) { |
9422 | shift -= 1; |
9423 | for (i = 0; i < frameCount4; ++i) { |
9424 | drflac_uint32 temp0L; |
9425 | drflac_uint32 temp1L; |
9426 | drflac_uint32 temp2L; |
9427 | drflac_uint32 temp3L; |
9428 | drflac_uint32 temp0R; |
9429 | drflac_uint32 temp1R; |
9430 | drflac_uint32 temp2R; |
9431 | drflac_uint32 temp3R; |
9432 | |
9433 | drflac_uint32 mid0 = pInputSamples0U32[i*4+0] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
9434 | drflac_uint32 mid1 = pInputSamples0U32[i*4+1] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
9435 | drflac_uint32 mid2 = pInputSamples0U32[i*4+2] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
9436 | drflac_uint32 mid3 = pInputSamples0U32[i*4+3] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
9437 | |
9438 | drflac_uint32 side0 = pInputSamples1U32[i*4+0] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
9439 | drflac_uint32 side1 = pInputSamples1U32[i*4+1] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
9440 | drflac_uint32 side2 = pInputSamples1U32[i*4+2] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
9441 | drflac_uint32 side3 = pInputSamples1U32[i*4+3] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
9442 | |
9443 | mid0 = (mid0 << 1) | (side0 & 0x01); |
9444 | mid1 = (mid1 << 1) | (side1 & 0x01); |
9445 | mid2 = (mid2 << 1) | (side2 & 0x01); |
9446 | mid3 = (mid3 << 1) | (side3 & 0x01); |
9447 | |
9448 | temp0L = (mid0 + side0) << shift; |
9449 | temp1L = (mid1 + side1) << shift; |
9450 | temp2L = (mid2 + side2) << shift; |
9451 | temp3L = (mid3 + side3) << shift; |
9452 | |
9453 | temp0R = (mid0 - side0) << shift; |
9454 | temp1R = (mid1 - side1) << shift; |
9455 | temp2R = (mid2 - side2) << shift; |
9456 | temp3R = (mid3 - side3) << shift; |
9457 | |
9458 | pOutputSamples[i*8+0] = (drflac_int32)temp0L * factor; |
9459 | pOutputSamples[i*8+1] = (drflac_int32)temp0R * factor; |
9460 | pOutputSamples[i*8+2] = (drflac_int32)temp1L * factor; |
9461 | pOutputSamples[i*8+3] = (drflac_int32)temp1R * factor; |
9462 | pOutputSamples[i*8+4] = (drflac_int32)temp2L * factor; |
9463 | pOutputSamples[i*8+5] = (drflac_int32)temp2R * factor; |
9464 | pOutputSamples[i*8+6] = (drflac_int32)temp3L * factor; |
9465 | pOutputSamples[i*8+7] = (drflac_int32)temp3R * factor; |
9466 | } |
9467 | } else { |
9468 | for (i = 0; i < frameCount4; ++i) { |
9469 | drflac_uint32 temp0L; |
9470 | drflac_uint32 temp1L; |
9471 | drflac_uint32 temp2L; |
9472 | drflac_uint32 temp3L; |
9473 | drflac_uint32 temp0R; |
9474 | drflac_uint32 temp1R; |
9475 | drflac_uint32 temp2R; |
9476 | drflac_uint32 temp3R; |
9477 | |
9478 | drflac_uint32 mid0 = pInputSamples0U32[i*4+0] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
9479 | drflac_uint32 mid1 = pInputSamples0U32[i*4+1] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
9480 | drflac_uint32 mid2 = pInputSamples0U32[i*4+2] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
9481 | drflac_uint32 mid3 = pInputSamples0U32[i*4+3] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
9482 | |
9483 | drflac_uint32 side0 = pInputSamples1U32[i*4+0] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
9484 | drflac_uint32 side1 = pInputSamples1U32[i*4+1] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
9485 | drflac_uint32 side2 = pInputSamples1U32[i*4+2] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
9486 | drflac_uint32 side3 = pInputSamples1U32[i*4+3] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
9487 | |
9488 | mid0 = (mid0 << 1) | (side0 & 0x01); |
9489 | mid1 = (mid1 << 1) | (side1 & 0x01); |
9490 | mid2 = (mid2 << 1) | (side2 & 0x01); |
9491 | mid3 = (mid3 << 1) | (side3 & 0x01); |
9492 | |
9493 | temp0L = (drflac_uint32)((drflac_int32)(mid0 + side0) >> 1); |
9494 | temp1L = (drflac_uint32)((drflac_int32)(mid1 + side1) >> 1); |
9495 | temp2L = (drflac_uint32)((drflac_int32)(mid2 + side2) >> 1); |
9496 | temp3L = (drflac_uint32)((drflac_int32)(mid3 + side3) >> 1); |
9497 | |
9498 | temp0R = (drflac_uint32)((drflac_int32)(mid0 - side0) >> 1); |
9499 | temp1R = (drflac_uint32)((drflac_int32)(mid1 - side1) >> 1); |
9500 | temp2R = (drflac_uint32)((drflac_int32)(mid2 - side2) >> 1); |
9501 | temp3R = (drflac_uint32)((drflac_int32)(mid3 - side3) >> 1); |
9502 | |
9503 | pOutputSamples[i*8+0] = (drflac_int32)temp0L * factor; |
9504 | pOutputSamples[i*8+1] = (drflac_int32)temp0R * factor; |
9505 | pOutputSamples[i*8+2] = (drflac_int32)temp1L * factor; |
9506 | pOutputSamples[i*8+3] = (drflac_int32)temp1R * factor; |
9507 | pOutputSamples[i*8+4] = (drflac_int32)temp2L * factor; |
9508 | pOutputSamples[i*8+5] = (drflac_int32)temp2R * factor; |
9509 | pOutputSamples[i*8+6] = (drflac_int32)temp3L * factor; |
9510 | pOutputSamples[i*8+7] = (drflac_int32)temp3R * factor; |
9511 | } |
9512 | } |
9513 | |
9514 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
9515 | drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
9516 | drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
9517 | |
9518 | mid = (mid << 1) | (side & 0x01); |
9519 | |
9520 | pOutputSamples[i*2+0] = (drflac_int32)((drflac_uint32)((drflac_int32)(mid + side) >> 1) << unusedBitsPerSample) * factor; |
9521 | pOutputSamples[i*2+1] = (drflac_int32)((drflac_uint32)((drflac_int32)(mid - side) >> 1) << unusedBitsPerSample) * factor; |
9522 | } |
9523 | } |
9524 | |
9525 | #if defined(DRFLAC_SUPPORT_SSE2) |
9526 | 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) |
9527 | { |
9528 | drflac_uint64 i; |
9529 | drflac_uint64 frameCount4 = frameCount >> 2; |
9530 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
9531 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
9532 | drflac_uint32 shift = unusedBitsPerSample - 8; |
9533 | float factor; |
9534 | __m128 factor128; |
9535 | |
9536 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
9537 | |
9538 | factor = 1.0f / 8388608.0f; |
9539 | factor128 = _mm_set1_ps(factor); |
9540 | |
9541 | if (shift == 0) { |
9542 | for (i = 0; i < frameCount4; ++i) { |
9543 | __m128i mid; |
9544 | __m128i side; |
9545 | __m128i tempL; |
9546 | __m128i tempR; |
9547 | __m128 leftf; |
9548 | __m128 rightf; |
9549 | |
9550 | mid = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); |
9551 | side = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); |
9552 | |
9553 | mid = _mm_or_si128(_mm_slli_epi32(mid, 1), _mm_and_si128(side, _mm_set1_epi32(0x01))); |
9554 | |
9555 | tempL = _mm_srai_epi32(_mm_add_epi32(mid, side), 1); |
9556 | tempR = _mm_srai_epi32(_mm_sub_epi32(mid, side), 1); |
9557 | |
9558 | leftf = _mm_mul_ps(_mm_cvtepi32_ps(tempL), factor128); |
9559 | rightf = _mm_mul_ps(_mm_cvtepi32_ps(tempR), factor128); |
9560 | |
9561 | _mm_storeu_ps(pOutputSamples + i*8 + 0, _mm_unpacklo_ps(leftf, rightf)); |
9562 | _mm_storeu_ps(pOutputSamples + i*8 + 4, _mm_unpackhi_ps(leftf, rightf)); |
9563 | } |
9564 | |
9565 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
9566 | drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
9567 | drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
9568 | |
9569 | mid = (mid << 1) | (side & 0x01); |
9570 | |
9571 | pOutputSamples[i*2+0] = ((drflac_int32)(mid + side) >> 1) * factor; |
9572 | pOutputSamples[i*2+1] = ((drflac_int32)(mid - side) >> 1) * factor; |
9573 | } |
9574 | } else { |
9575 | shift -= 1; |
9576 | for (i = 0; i < frameCount4; ++i) { |
9577 | __m128i mid; |
9578 | __m128i side; |
9579 | __m128i tempL; |
9580 | __m128i tempR; |
9581 | __m128 leftf; |
9582 | __m128 rightf; |
9583 | |
9584 | mid = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); |
9585 | side = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); |
9586 | |
9587 | mid = _mm_or_si128(_mm_slli_epi32(mid, 1), _mm_and_si128(side, _mm_set1_epi32(0x01))); |
9588 | |
9589 | tempL = _mm_slli_epi32(_mm_add_epi32(mid, side), shift); |
9590 | tempR = _mm_slli_epi32(_mm_sub_epi32(mid, side), shift); |
9591 | |
9592 | leftf = _mm_mul_ps(_mm_cvtepi32_ps(tempL), factor128); |
9593 | rightf = _mm_mul_ps(_mm_cvtepi32_ps(tempR), factor128); |
9594 | |
9595 | _mm_storeu_ps(pOutputSamples + i*8 + 0, _mm_unpacklo_ps(leftf, rightf)); |
9596 | _mm_storeu_ps(pOutputSamples + i*8 + 4, _mm_unpackhi_ps(leftf, rightf)); |
9597 | } |
9598 | |
9599 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
9600 | drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
9601 | drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
9602 | |
9603 | mid = (mid << 1) | (side & 0x01); |
9604 | |
9605 | pOutputSamples[i*2+0] = (drflac_int32)((mid + side) << shift) * factor; |
9606 | pOutputSamples[i*2+1] = (drflac_int32)((mid - side) << shift) * factor; |
9607 | } |
9608 | } |
9609 | } |
9610 | #endif |
9611 | |
9612 | #if defined(DRFLAC_SUPPORT_NEON) |
9613 | 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) |
9614 | { |
9615 | drflac_uint64 i; |
9616 | drflac_uint64 frameCount4 = frameCount >> 2; |
9617 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
9618 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
9619 | drflac_uint32 shift = unusedBitsPerSample - 8; |
9620 | float factor; |
9621 | float32x4_t factor4; |
9622 | int32x4_t shift4; |
9623 | int32x4_t wbps0_4; /* Wasted Bits Per Sample */ |
9624 | int32x4_t wbps1_4; /* Wasted Bits Per Sample */ |
9625 | |
9626 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
9627 | |
9628 | factor = 1.0f / 8388608.0f; |
9629 | factor4 = vdupq_n_f32(factor); |
9630 | wbps0_4 = vdupq_n_s32(pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); |
9631 | wbps1_4 = vdupq_n_s32(pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); |
9632 | |
9633 | if (shift == 0) { |
9634 | for (i = 0; i < frameCount4; ++i) { |
9635 | int32x4_t lefti; |
9636 | int32x4_t righti; |
9637 | float32x4_t leftf; |
9638 | float32x4_t rightf; |
9639 | |
9640 | uint32x4_t mid = vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), wbps0_4); |
9641 | uint32x4_t side = vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), wbps1_4); |
9642 | |
9643 | mid = vorrq_u32(vshlq_n_u32(mid, 1), vandq_u32(side, vdupq_n_u32(1))); |
9644 | |
9645 | lefti = vshrq_n_s32(vreinterpretq_s32_u32(vaddq_u32(mid, side)), 1); |
9646 | righti = vshrq_n_s32(vreinterpretq_s32_u32(vsubq_u32(mid, side)), 1); |
9647 | |
9648 | leftf = vmulq_f32(vcvtq_f32_s32(lefti), factor4); |
9649 | rightf = vmulq_f32(vcvtq_f32_s32(righti), factor4); |
9650 | |
9651 | drflac__vst2q_f32(pOutputSamples + i*8, vzipq_f32(leftf, rightf)); |
9652 | } |
9653 | |
9654 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
9655 | drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
9656 | drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
9657 | |
9658 | mid = (mid << 1) | (side & 0x01); |
9659 | |
9660 | pOutputSamples[i*2+0] = ((drflac_int32)(mid + side) >> 1) * factor; |
9661 | pOutputSamples[i*2+1] = ((drflac_int32)(mid - side) >> 1) * factor; |
9662 | } |
9663 | } else { |
9664 | shift -= 1; |
9665 | shift4 = vdupq_n_s32(shift); |
9666 | for (i = 0; i < frameCount4; ++i) { |
9667 | uint32x4_t mid; |
9668 | uint32x4_t side; |
9669 | int32x4_t lefti; |
9670 | int32x4_t righti; |
9671 | float32x4_t leftf; |
9672 | float32x4_t rightf; |
9673 | |
9674 | mid = vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), wbps0_4); |
9675 | side = vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), wbps1_4); |
9676 | |
9677 | mid = vorrq_u32(vshlq_n_u32(mid, 1), vandq_u32(side, vdupq_n_u32(1))); |
9678 | |
9679 | lefti = vreinterpretq_s32_u32(vshlq_u32(vaddq_u32(mid, side), shift4)); |
9680 | righti = vreinterpretq_s32_u32(vshlq_u32(vsubq_u32(mid, side), shift4)); |
9681 | |
9682 | leftf = vmulq_f32(vcvtq_f32_s32(lefti), factor4); |
9683 | rightf = vmulq_f32(vcvtq_f32_s32(righti), factor4); |
9684 | |
9685 | drflac__vst2q_f32(pOutputSamples + i*8, vzipq_f32(leftf, rightf)); |
9686 | } |
9687 | |
9688 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
9689 | drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
9690 | drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
9691 | |
9692 | mid = (mid << 1) | (side & 0x01); |
9693 | |
9694 | pOutputSamples[i*2+0] = (drflac_int32)((mid + side) << shift) * factor; |
9695 | pOutputSamples[i*2+1] = (drflac_int32)((mid - side) << shift) * factor; |
9696 | } |
9697 | } |
9698 | } |
9699 | #endif |
9700 | |
9701 | 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) |
9702 | { |
9703 | #if defined(DRFLAC_SUPPORT_SSE2) |
9704 | if (drflac__gIsSSE2Supported && pFlac->bitsPerSample <= 24) { |
9705 | drflac_read_pcm_frames_f32__decode_mid_side__sse2(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
9706 | } else |
9707 | #elif defined(DRFLAC_SUPPORT_NEON) |
9708 | if (drflac__gIsNEONSupported && pFlac->bitsPerSample <= 24) { |
9709 | drflac_read_pcm_frames_f32__decode_mid_side__neon(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
9710 | } else |
9711 | #endif |
9712 | { |
9713 | /* Scalar fallback. */ |
2ff0b512 |
9714 | drflac_read_pcm_frames_f32__decode_mid_side__scalar(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
2ff0b512 |
9715 | } |
9716 | } |
2ff0b512 |
9717 | |
9718 | 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) |
9719 | { |
9720 | drflac_uint64 i; |
9721 | drflac_uint64 frameCount4 = frameCount >> 2; |
9722 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
9723 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
9724 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
9725 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
9726 | float factor = 1 / 2147483648.0; |
9727 | |
9728 | for (i = 0; i < frameCount4; ++i) { |
9729 | drflac_uint32 tempL0 = pInputSamples0U32[i*4+0] << shift0; |
9730 | drflac_uint32 tempL1 = pInputSamples0U32[i*4+1] << shift0; |
9731 | drflac_uint32 tempL2 = pInputSamples0U32[i*4+2] << shift0; |
9732 | drflac_uint32 tempL3 = pInputSamples0U32[i*4+3] << shift0; |
9733 | |
9734 | drflac_uint32 tempR0 = pInputSamples1U32[i*4+0] << shift1; |
9735 | drflac_uint32 tempR1 = pInputSamples1U32[i*4+1] << shift1; |
9736 | drflac_uint32 tempR2 = pInputSamples1U32[i*4+2] << shift1; |
9737 | drflac_uint32 tempR3 = pInputSamples1U32[i*4+3] << shift1; |
9738 | |
9739 | pOutputSamples[i*8+0] = (drflac_int32)tempL0 * factor; |
9740 | pOutputSamples[i*8+1] = (drflac_int32)tempR0 * factor; |
9741 | pOutputSamples[i*8+2] = (drflac_int32)tempL1 * factor; |
9742 | pOutputSamples[i*8+3] = (drflac_int32)tempR1 * factor; |
9743 | pOutputSamples[i*8+4] = (drflac_int32)tempL2 * factor; |
9744 | pOutputSamples[i*8+5] = (drflac_int32)tempR2 * factor; |
9745 | pOutputSamples[i*8+6] = (drflac_int32)tempL3 * factor; |
9746 | pOutputSamples[i*8+7] = (drflac_int32)tempR3 * factor; |
9747 | } |
9748 | |
9749 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
9750 | pOutputSamples[i*2+0] = (drflac_int32)(pInputSamples0U32[i] << shift0) * factor; |
9751 | pOutputSamples[i*2+1] = (drflac_int32)(pInputSamples1U32[i] << shift1) * factor; |
9752 | } |
9753 | } |
9754 | |
9755 | #if defined(DRFLAC_SUPPORT_SSE2) |
9756 | 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) |
9757 | { |
9758 | drflac_uint64 i; |
9759 | drflac_uint64 frameCount4 = frameCount >> 2; |
9760 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
9761 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
9762 | drflac_uint32 shift0 = (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample) - 8; |
9763 | drflac_uint32 shift1 = (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample) - 8; |
9764 | |
9765 | float factor = 1.0f / 8388608.0f; |
9766 | __m128 factor128 = _mm_set1_ps(factor); |
9767 | |
9768 | for (i = 0; i < frameCount4; ++i) { |
9769 | __m128i lefti; |
9770 | __m128i righti; |
9771 | __m128 leftf; |
9772 | __m128 rightf; |
9773 | |
9774 | lefti = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), shift0); |
9775 | righti = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), shift1); |
9776 | |
9777 | leftf = _mm_mul_ps(_mm_cvtepi32_ps(lefti), factor128); |
9778 | rightf = _mm_mul_ps(_mm_cvtepi32_ps(righti), factor128); |
9779 | |
9780 | _mm_storeu_ps(pOutputSamples + i*8 + 0, _mm_unpacklo_ps(leftf, rightf)); |
9781 | _mm_storeu_ps(pOutputSamples + i*8 + 4, _mm_unpackhi_ps(leftf, rightf)); |
9782 | } |
9783 | |
9784 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
9785 | pOutputSamples[i*2+0] = (drflac_int32)(pInputSamples0U32[i] << shift0) * factor; |
9786 | pOutputSamples[i*2+1] = (drflac_int32)(pInputSamples1U32[i] << shift1) * factor; |
9787 | } |
9788 | } |
9789 | #endif |
9790 | |
9791 | #if defined(DRFLAC_SUPPORT_NEON) |
9792 | 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) |
9793 | { |
9794 | drflac_uint64 i; |
9795 | drflac_uint64 frameCount4 = frameCount >> 2; |
9796 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
9797 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
9798 | drflac_uint32 shift0 = (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample) - 8; |
9799 | drflac_uint32 shift1 = (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample) - 8; |
9800 | |
9801 | float factor = 1.0f / 8388608.0f; |
9802 | float32x4_t factor4 = vdupq_n_f32(factor); |
9803 | int32x4_t shift0_4 = vdupq_n_s32(shift0); |
9804 | int32x4_t shift1_4 = vdupq_n_s32(shift1); |
9805 | |
9806 | for (i = 0; i < frameCount4; ++i) { |
9807 | int32x4_t lefti; |
9808 | int32x4_t righti; |
9809 | float32x4_t leftf; |
9810 | float32x4_t rightf; |
9811 | |
9812 | lefti = vreinterpretq_s32_u32(vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), shift0_4)); |
9813 | righti = vreinterpretq_s32_u32(vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), shift1_4)); |
9814 | |
9815 | leftf = vmulq_f32(vcvtq_f32_s32(lefti), factor4); |
9816 | rightf = vmulq_f32(vcvtq_f32_s32(righti), factor4); |
9817 | |
9818 | drflac__vst2q_f32(pOutputSamples + i*8, vzipq_f32(leftf, rightf)); |
9819 | } |
9820 | |
9821 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
9822 | pOutputSamples[i*2+0] = (drflac_int32)(pInputSamples0U32[i] << shift0) * factor; |
9823 | pOutputSamples[i*2+1] = (drflac_int32)(pInputSamples1U32[i] << shift1) * factor; |
9824 | } |
9825 | } |
9826 | #endif |
9827 | |
9828 | 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) |
9829 | { |
9830 | #if defined(DRFLAC_SUPPORT_SSE2) |
9831 | if (drflac__gIsSSE2Supported && pFlac->bitsPerSample <= 24) { |
9832 | drflac_read_pcm_frames_f32__decode_independent_stereo__sse2(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
9833 | } else |
9834 | #elif defined(DRFLAC_SUPPORT_NEON) |
9835 | if (drflac__gIsNEONSupported && pFlac->bitsPerSample <= 24) { |
9836 | drflac_read_pcm_frames_f32__decode_independent_stereo__neon(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
9837 | } else |
9838 | #endif |
9839 | { |
9840 | /* Scalar fallback. */ |
2ff0b512 |
9841 | drflac_read_pcm_frames_f32__decode_independent_stereo__scalar(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
2ff0b512 |
9842 | } |
9843 | } |
9844 | |
9845 | DRFLAC_API drflac_uint64 drflac_read_pcm_frames_f32(drflac* pFlac, drflac_uint64 framesToRead, float* pBufferOut) |
9846 | { |
9847 | drflac_uint64 framesRead; |
9848 | drflac_uint32 unusedBitsPerSample; |
9849 | |
9850 | if (pFlac == NULL || framesToRead == 0) { |
9851 | return 0; |
9852 | } |
9853 | |
9854 | if (pBufferOut == NULL) { |
9855 | return drflac__seek_forward_by_pcm_frames(pFlac, framesToRead); |
9856 | } |
9857 | |
9858 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 32); |
9859 | unusedBitsPerSample = 32 - pFlac->bitsPerSample; |
9860 | |
9861 | framesRead = 0; |
9862 | while (framesToRead > 0) { |
9863 | /* If we've run out of samples in this frame, go to the next. */ |
9864 | if (pFlac->currentFLACFrame.pcmFramesRemaining == 0) { |
9865 | if (!drflac__read_and_decode_next_flac_frame(pFlac)) { |
9866 | break; /* Couldn't read the next frame, so just break from the loop and return. */ |
9867 | } |
9868 | } else { |
9869 | unsigned int channelCount = drflac__get_channel_count_from_channel_assignment(pFlac->currentFLACFrame.header.channelAssignment); |
9870 | drflac_uint64 iFirstPCMFrame = pFlac->currentFLACFrame.header.blockSizeInPCMFrames - pFlac->currentFLACFrame.pcmFramesRemaining; |
9871 | drflac_uint64 frameCountThisIteration = framesToRead; |
9872 | |
9873 | if (frameCountThisIteration > pFlac->currentFLACFrame.pcmFramesRemaining) { |
9874 | frameCountThisIteration = pFlac->currentFLACFrame.pcmFramesRemaining; |
9875 | } |
9876 | |
9877 | if (channelCount == 2) { |
9878 | const drflac_int32* pDecodedSamples0 = pFlac->currentFLACFrame.subframes[0].pSamplesS32 + iFirstPCMFrame; |
9879 | const drflac_int32* pDecodedSamples1 = pFlac->currentFLACFrame.subframes[1].pSamplesS32 + iFirstPCMFrame; |
9880 | |
9881 | switch (pFlac->currentFLACFrame.header.channelAssignment) |
9882 | { |
9883 | case DRFLAC_CHANNEL_ASSIGNMENT_LEFT_SIDE: |
9884 | { |
9885 | drflac_read_pcm_frames_f32__decode_left_side(pFlac, frameCountThisIteration, unusedBitsPerSample, pDecodedSamples0, pDecodedSamples1, pBufferOut); |
9886 | } break; |
9887 | |
9888 | case DRFLAC_CHANNEL_ASSIGNMENT_RIGHT_SIDE: |
9889 | { |
9890 | drflac_read_pcm_frames_f32__decode_right_side(pFlac, frameCountThisIteration, unusedBitsPerSample, pDecodedSamples0, pDecodedSamples1, pBufferOut); |
9891 | } break; |
9892 | |
9893 | case DRFLAC_CHANNEL_ASSIGNMENT_MID_SIDE: |
9894 | { |
9895 | drflac_read_pcm_frames_f32__decode_mid_side(pFlac, frameCountThisIteration, unusedBitsPerSample, pDecodedSamples0, pDecodedSamples1, pBufferOut); |
9896 | } break; |
9897 | |
9898 | case DRFLAC_CHANNEL_ASSIGNMENT_INDEPENDENT: |
9899 | default: |
9900 | { |
9901 | drflac_read_pcm_frames_f32__decode_independent_stereo(pFlac, frameCountThisIteration, unusedBitsPerSample, pDecodedSamples0, pDecodedSamples1, pBufferOut); |
9902 | } break; |
9903 | } |
9904 | } else { |
9905 | /* Generic interleaving. */ |
9906 | drflac_uint64 i; |
9907 | for (i = 0; i < frameCountThisIteration; ++i) { |
9908 | unsigned int j; |
9909 | for (j = 0; j < channelCount; ++j) { |
9910 | drflac_int32 sampleS32 = (drflac_int32)((drflac_uint32)(pFlac->currentFLACFrame.subframes[j].pSamplesS32[iFirstPCMFrame + i]) << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[j].wastedBitsPerSample)); |
9911 | pBufferOut[(i*channelCount)+j] = (float)(sampleS32 / 2147483648.0); |
9912 | } |
9913 | } |
9914 | } |
9915 | |
9916 | framesRead += frameCountThisIteration; |
9917 | pBufferOut += frameCountThisIteration * channelCount; |
9918 | framesToRead -= frameCountThisIteration; |
9919 | pFlac->currentPCMFrame += frameCountThisIteration; |
9920 | pFlac->currentFLACFrame.pcmFramesRemaining -= (unsigned int)frameCountThisIteration; |
9921 | } |
9922 | } |
9923 | |
9924 | return framesRead; |
9925 | } |
9926 | |
9927 | |
9928 | DRFLAC_API drflac_bool32 drflac_seek_to_pcm_frame(drflac* pFlac, drflac_uint64 pcmFrameIndex) |
9929 | { |
9930 | if (pFlac == NULL) { |
9931 | return DRFLAC_FALSE; |
9932 | } |
9933 | |
9934 | /* Don't do anything if we're already on the seek point. */ |
9935 | if (pFlac->currentPCMFrame == pcmFrameIndex) { |
9936 | return DRFLAC_TRUE; |
9937 | } |
9938 | |
9939 | /* |
9940 | 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 |
9941 | when the decoder was opened. |
9942 | */ |
9943 | if (pFlac->firstFLACFramePosInBytes == 0) { |
9944 | return DRFLAC_FALSE; |
9945 | } |
9946 | |
9947 | if (pcmFrameIndex == 0) { |
9948 | pFlac->currentPCMFrame = 0; |
9949 | return drflac__seek_to_first_frame(pFlac); |
9950 | } else { |
9951 | drflac_bool32 wasSuccessful = DRFLAC_FALSE; |
9952 | |
9953 | /* Clamp the sample to the end. */ |
9954 | if (pcmFrameIndex > pFlac->totalPCMFrameCount) { |
9955 | pcmFrameIndex = pFlac->totalPCMFrameCount; |
9956 | } |
9957 | |
9958 | /* If the target sample and the current sample are in the same frame we just move the position forward. */ |
9959 | if (pcmFrameIndex > pFlac->currentPCMFrame) { |
9960 | /* Forward. */ |
9961 | drflac_uint32 offset = (drflac_uint32)(pcmFrameIndex - pFlac->currentPCMFrame); |
9962 | if (pFlac->currentFLACFrame.pcmFramesRemaining > offset) { |
9963 | pFlac->currentFLACFrame.pcmFramesRemaining -= offset; |
9964 | pFlac->currentPCMFrame = pcmFrameIndex; |
9965 | return DRFLAC_TRUE; |
9966 | } |
9967 | } else { |
9968 | /* Backward. */ |
9969 | drflac_uint32 offsetAbs = (drflac_uint32)(pFlac->currentPCMFrame - pcmFrameIndex); |
9970 | drflac_uint32 currentFLACFramePCMFrameCount = pFlac->currentFLACFrame.header.blockSizeInPCMFrames; |
9971 | drflac_uint32 currentFLACFramePCMFramesConsumed = currentFLACFramePCMFrameCount - pFlac->currentFLACFrame.pcmFramesRemaining; |
9972 | if (currentFLACFramePCMFramesConsumed > offsetAbs) { |
9973 | pFlac->currentFLACFrame.pcmFramesRemaining += offsetAbs; |
9974 | pFlac->currentPCMFrame = pcmFrameIndex; |
9975 | return DRFLAC_TRUE; |
9976 | } |
9977 | } |
9978 | |
9979 | /* |
9980 | Different techniques depending on encapsulation. Using the native FLAC seektable with Ogg encapsulation is a bit awkward so |
9981 | we'll instead use Ogg's natural seeking facility. |
9982 | */ |
9983 | #ifndef DR_FLAC_NO_OGG |
9984 | if (pFlac->container == drflac_container_ogg) |
9985 | { |
9986 | wasSuccessful = drflac_ogg__seek_to_pcm_frame(pFlac, pcmFrameIndex); |
9987 | } |
9988 | else |
9989 | #endif |
9990 | { |
9991 | /* First try seeking via the seek table. If this fails, fall back to a brute force seek which is much slower. */ |
9992 | if (/*!wasSuccessful && */!pFlac->_noSeekTableSeek) { |
9993 | wasSuccessful = drflac__seek_to_pcm_frame__seek_table(pFlac, pcmFrameIndex); |
9994 | } |
9995 | |
9996 | #if !defined(DR_FLAC_NO_CRC) |
9997 | /* Fall back to binary search if seek table seeking fails. This requires the length of the stream to be known. */ |
9998 | if (!wasSuccessful && !pFlac->_noBinarySearchSeek && pFlac->totalPCMFrameCount > 0) { |
9999 | wasSuccessful = drflac__seek_to_pcm_frame__binary_search(pFlac, pcmFrameIndex); |
10000 | } |
10001 | #endif |
10002 | |
10003 | /* Fall back to brute force if all else fails. */ |
10004 | if (!wasSuccessful && !pFlac->_noBruteForceSeek) { |
10005 | wasSuccessful = drflac__seek_to_pcm_frame__brute_force(pFlac, pcmFrameIndex); |
10006 | } |
10007 | } |
10008 | |
10009 | pFlac->currentPCMFrame = pcmFrameIndex; |
10010 | return wasSuccessful; |
10011 | } |
10012 | } |
10013 | |
10014 | |
10015 | |
10016 | /* High Level APIs */ |
10017 | |
10018 | #if defined(SIZE_MAX) |
10019 | #define DRFLAC_SIZE_MAX SIZE_MAX |
10020 | #else |
10021 | #if defined(DRFLAC_64BIT) |
10022 | #define DRFLAC_SIZE_MAX ((drflac_uint64)0xFFFFFFFFFFFFFFFF) |
10023 | #else |
10024 | #define DRFLAC_SIZE_MAX 0xFFFFFFFF |
10025 | #endif |
10026 | #endif |
10027 | |
10028 | |
10029 | /* Using a macro as the definition of the drflac__full_decode_and_close_*() API family. Sue me. */ |
10030 | #define DRFLAC_DEFINE_FULL_READ_AND_CLOSE(extension, type) \ |
10031 | static type* drflac__full_read_and_close_ ## extension (drflac* pFlac, unsigned int* channelsOut, unsigned int* sampleRateOut, drflac_uint64* totalPCMFrameCountOut)\ |
10032 | { \ |
10033 | type* pSampleData = NULL; \ |
10034 | drflac_uint64 totalPCMFrameCount; \ |
10035 | \ |
10036 | DRFLAC_ASSERT(pFlac != NULL); \ |
10037 | \ |
10038 | totalPCMFrameCount = pFlac->totalPCMFrameCount; \ |
10039 | \ |
10040 | if (totalPCMFrameCount == 0) { \ |
10041 | type buffer[4096]; \ |
10042 | drflac_uint64 pcmFramesRead; \ |
10043 | size_t sampleDataBufferSize = sizeof(buffer); \ |
10044 | \ |
10045 | pSampleData = (type*)drflac__malloc_from_callbacks(sampleDataBufferSize, &pFlac->allocationCallbacks); \ |
10046 | if (pSampleData == NULL) { \ |
10047 | goto on_error; \ |
10048 | } \ |
10049 | \ |
10050 | while ((pcmFramesRead = (drflac_uint64)drflac_read_pcm_frames_##extension(pFlac, sizeof(buffer)/sizeof(buffer[0])/pFlac->channels, buffer)) > 0) { \ |
10051 | if (((totalPCMFrameCount + pcmFramesRead) * pFlac->channels * sizeof(type)) > sampleDataBufferSize) { \ |
10052 | type* pNewSampleData; \ |
10053 | size_t newSampleDataBufferSize; \ |
10054 | \ |
10055 | newSampleDataBufferSize = sampleDataBufferSize * 2; \ |
10056 | pNewSampleData = (type*)drflac__realloc_from_callbacks(pSampleData, newSampleDataBufferSize, sampleDataBufferSize, &pFlac->allocationCallbacks); \ |
10057 | if (pNewSampleData == NULL) { \ |
10058 | drflac__free_from_callbacks(pSampleData, &pFlac->allocationCallbacks); \ |
10059 | goto on_error; \ |
10060 | } \ |
10061 | \ |
10062 | sampleDataBufferSize = newSampleDataBufferSize; \ |
10063 | pSampleData = pNewSampleData; \ |
10064 | } \ |
10065 | \ |
10066 | DRFLAC_COPY_MEMORY(pSampleData + (totalPCMFrameCount*pFlac->channels), buffer, (size_t)(pcmFramesRead*pFlac->channels*sizeof(type))); \ |
10067 | totalPCMFrameCount += pcmFramesRead; \ |
10068 | } \ |
10069 | \ |
10070 | /* At this point everything should be decoded, but we just want to fill the unused part buffer with silence - need to \ |
10071 | protect those ears from random noise! */ \ |
10072 | DRFLAC_ZERO_MEMORY(pSampleData + (totalPCMFrameCount*pFlac->channels), (size_t)(sampleDataBufferSize - totalPCMFrameCount*pFlac->channels*sizeof(type))); \ |
10073 | } else { \ |
10074 | drflac_uint64 dataSize = totalPCMFrameCount*pFlac->channels*sizeof(type); \ |
10075 | if (dataSize > DRFLAC_SIZE_MAX) { \ |
10076 | goto on_error; /* The decoded data is too big. */ \ |
10077 | } \ |
10078 | \ |
10079 | pSampleData = (type*)drflac__malloc_from_callbacks((size_t)dataSize, &pFlac->allocationCallbacks); /* <-- Safe cast as per the check above. */ \ |
10080 | if (pSampleData == NULL) { \ |
10081 | goto on_error; \ |
10082 | } \ |
10083 | \ |
10084 | totalPCMFrameCount = drflac_read_pcm_frames_##extension(pFlac, pFlac->totalPCMFrameCount, pSampleData); \ |
10085 | } \ |
10086 | \ |
10087 | if (sampleRateOut) *sampleRateOut = pFlac->sampleRate; \ |
10088 | if (channelsOut) *channelsOut = pFlac->channels; \ |
10089 | if (totalPCMFrameCountOut) *totalPCMFrameCountOut = totalPCMFrameCount; \ |
10090 | \ |
10091 | drflac_close(pFlac); \ |
10092 | return pSampleData; \ |
10093 | \ |
10094 | on_error: \ |
10095 | drflac_close(pFlac); \ |
10096 | return NULL; \ |
10097 | } |
10098 | |
10099 | DRFLAC_DEFINE_FULL_READ_AND_CLOSE(s32, drflac_int32) |
10100 | DRFLAC_DEFINE_FULL_READ_AND_CLOSE(s16, drflac_int16) |
10101 | DRFLAC_DEFINE_FULL_READ_AND_CLOSE(f32, float) |
10102 | |
10103 | 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) |
10104 | { |
10105 | drflac* pFlac; |
10106 | |
10107 | if (channelsOut) { |
10108 | *channelsOut = 0; |
10109 | } |
10110 | if (sampleRateOut) { |
10111 | *sampleRateOut = 0; |
10112 | } |
10113 | if (totalPCMFrameCountOut) { |
10114 | *totalPCMFrameCountOut = 0; |
10115 | } |
10116 | |
10117 | pFlac = drflac_open(onRead, onSeek, pUserData, pAllocationCallbacks); |
10118 | if (pFlac == NULL) { |
10119 | return NULL; |
10120 | } |
10121 | |
10122 | return drflac__full_read_and_close_s32(pFlac, channelsOut, sampleRateOut, totalPCMFrameCountOut); |
10123 | } |
10124 | |
10125 | 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) |
10126 | { |
10127 | drflac* pFlac; |
10128 | |
10129 | if (channelsOut) { |
10130 | *channelsOut = 0; |
10131 | } |
10132 | if (sampleRateOut) { |
10133 | *sampleRateOut = 0; |
10134 | } |
10135 | if (totalPCMFrameCountOut) { |
10136 | *totalPCMFrameCountOut = 0; |
10137 | } |
10138 | |
10139 | pFlac = drflac_open(onRead, onSeek, pUserData, pAllocationCallbacks); |
10140 | if (pFlac == NULL) { |
10141 | return NULL; |
10142 | } |
10143 | |
10144 | return drflac__full_read_and_close_s16(pFlac, channelsOut, sampleRateOut, totalPCMFrameCountOut); |
10145 | } |
10146 | |
10147 | 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) |
10148 | { |
10149 | drflac* pFlac; |
10150 | |
10151 | if (channelsOut) { |
10152 | *channelsOut = 0; |
10153 | } |
10154 | if (sampleRateOut) { |
10155 | *sampleRateOut = 0; |
10156 | } |
10157 | if (totalPCMFrameCountOut) { |
10158 | *totalPCMFrameCountOut = 0; |
10159 | } |
10160 | |
10161 | pFlac = drflac_open(onRead, onSeek, pUserData, pAllocationCallbacks); |
10162 | if (pFlac == NULL) { |
10163 | return NULL; |
10164 | } |
10165 | |
10166 | return drflac__full_read_and_close_f32(pFlac, channelsOut, sampleRateOut, totalPCMFrameCountOut); |
10167 | } |
10168 | |
2ff0b512 |
10169 | 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) |
10170 | { |
10171 | drflac* pFlac; |
10172 | |
10173 | if (sampleRate) { |
10174 | *sampleRate = 0; |
10175 | } |
10176 | if (channels) { |
10177 | *channels = 0; |
10178 | } |
10179 | if (totalPCMFrameCount) { |
10180 | *totalPCMFrameCount = 0; |
10181 | } |
10182 | |
10183 | pFlac = drflac_open_memory(data, dataSize, pAllocationCallbacks); |
10184 | if (pFlac == NULL) { |
10185 | return NULL; |
10186 | } |
10187 | |
10188 | return drflac__full_read_and_close_s32(pFlac, channels, sampleRate, totalPCMFrameCount); |
10189 | } |
10190 | |
10191 | 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) |
10192 | { |
10193 | drflac* pFlac; |
10194 | |
10195 | if (sampleRate) { |
10196 | *sampleRate = 0; |
10197 | } |
10198 | if (channels) { |
10199 | *channels = 0; |
10200 | } |
10201 | if (totalPCMFrameCount) { |
10202 | *totalPCMFrameCount = 0; |
10203 | } |
10204 | |
10205 | pFlac = drflac_open_memory(data, dataSize, pAllocationCallbacks); |
10206 | if (pFlac == NULL) { |
10207 | return NULL; |
10208 | } |
10209 | |
10210 | return drflac__full_read_and_close_s16(pFlac, channels, sampleRate, totalPCMFrameCount); |
10211 | } |
10212 | |
10213 | 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) |
10214 | { |
10215 | drflac* pFlac; |
10216 | |
10217 | if (sampleRate) { |
10218 | *sampleRate = 0; |
10219 | } |
10220 | if (channels) { |
10221 | *channels = 0; |
10222 | } |
10223 | if (totalPCMFrameCount) { |
10224 | *totalPCMFrameCount = 0; |
10225 | } |
10226 | |
10227 | pFlac = drflac_open_memory(data, dataSize, pAllocationCallbacks); |
10228 | if (pFlac == NULL) { |
10229 | return NULL; |
10230 | } |
10231 | |
10232 | return drflac__full_read_and_close_f32(pFlac, channels, sampleRate, totalPCMFrameCount); |
10233 | } |
10234 | |
10235 | |
10236 | DRFLAC_API void drflac_free(void* p, const drflac_allocation_callbacks* pAllocationCallbacks) |
10237 | { |
10238 | if (pAllocationCallbacks != NULL) { |
10239 | drflac__free_from_callbacks(p, pAllocationCallbacks); |
10240 | } else { |
10241 | drflac__free_default(p, NULL); |
10242 | } |
10243 | } |
10244 | |
10245 | |
10246 | |
10247 | |
10248 | DRFLAC_API void drflac_init_vorbis_comment_iterator(drflac_vorbis_comment_iterator* pIter, drflac_uint32 commentCount, const void* pComments) |
10249 | { |
10250 | if (pIter == NULL) { |
10251 | return; |
10252 | } |
10253 | |
10254 | pIter->countRemaining = commentCount; |
10255 | pIter->pRunningData = (const char*)pComments; |
10256 | } |
10257 | |
10258 | DRFLAC_API const char* drflac_next_vorbis_comment(drflac_vorbis_comment_iterator* pIter, drflac_uint32* pCommentLengthOut) |
10259 | { |
10260 | drflac_int32 length; |
10261 | const char* pComment; |
10262 | |
10263 | /* Safety. */ |
10264 | if (pCommentLengthOut) { |
10265 | *pCommentLengthOut = 0; |
10266 | } |
10267 | |
10268 | if (pIter == NULL || pIter->countRemaining == 0 || pIter->pRunningData == NULL) { |
10269 | return NULL; |
10270 | } |
10271 | |
10272 | length = drflac__le2host_32(*(const drflac_uint32*)pIter->pRunningData); |
10273 | pIter->pRunningData += 4; |
10274 | |
10275 | pComment = pIter->pRunningData; |
10276 | pIter->pRunningData += length; |
10277 | pIter->countRemaining -= 1; |
10278 | |
10279 | if (pCommentLengthOut) { |
10280 | *pCommentLengthOut = length; |
10281 | } |
10282 | |
10283 | return pComment; |
10284 | } |
10285 | |
10286 | |
10287 | |
10288 | |
10289 | DRFLAC_API void drflac_init_cuesheet_track_iterator(drflac_cuesheet_track_iterator* pIter, drflac_uint32 trackCount, const void* pTrackData) |
10290 | { |
10291 | if (pIter == NULL) { |
10292 | return; |
10293 | } |
10294 | |
10295 | pIter->countRemaining = trackCount; |
10296 | pIter->pRunningData = (const char*)pTrackData; |
10297 | } |
10298 | |
10299 | DRFLAC_API drflac_bool32 drflac_next_cuesheet_track(drflac_cuesheet_track_iterator* pIter, drflac_cuesheet_track* pCuesheetTrack) |
10300 | { |
10301 | drflac_cuesheet_track cuesheetTrack; |
10302 | const char* pRunningData; |
10303 | drflac_uint64 offsetHi; |
10304 | drflac_uint64 offsetLo; |
10305 | |
10306 | if (pIter == NULL || pIter->countRemaining == 0 || pIter->pRunningData == NULL) { |
10307 | return DRFLAC_FALSE; |
10308 | } |
10309 | |
10310 | pRunningData = pIter->pRunningData; |
10311 | |
10312 | offsetHi = drflac__be2host_32(*(const drflac_uint32*)pRunningData); pRunningData += 4; |
10313 | offsetLo = drflac__be2host_32(*(const drflac_uint32*)pRunningData); pRunningData += 4; |
10314 | cuesheetTrack.offset = offsetLo | (offsetHi << 32); |
10315 | cuesheetTrack.trackNumber = pRunningData[0]; pRunningData += 1; |
10316 | DRFLAC_COPY_MEMORY(cuesheetTrack.ISRC, pRunningData, sizeof(cuesheetTrack.ISRC)); pRunningData += 12; |
10317 | cuesheetTrack.isAudio = (pRunningData[0] & 0x80) != 0; |
10318 | cuesheetTrack.preEmphasis = (pRunningData[0] & 0x40) != 0; pRunningData += 14; |
10319 | cuesheetTrack.indexCount = pRunningData[0]; pRunningData += 1; |
10320 | cuesheetTrack.pIndexPoints = (const drflac_cuesheet_track_index*)pRunningData; pRunningData += cuesheetTrack.indexCount * sizeof(drflac_cuesheet_track_index); |
10321 | |
10322 | pIter->pRunningData = pRunningData; |
10323 | pIter->countRemaining -= 1; |
10324 | |
10325 | if (pCuesheetTrack) { |
10326 | *pCuesheetTrack = cuesheetTrack; |
10327 | } |
10328 | |
10329 | return DRFLAC_TRUE; |
10330 | } |
10331 | |
10332 | #if defined(__clang__) || (defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6))) |
10333 | #pragma GCC diagnostic pop |
10334 | #endif |
10335 | #endif /* dr_flac_c */ |
10336 | #endif /* DR_FLAC_IMPLEMENTATION */ |
10337 | |
10338 | |
10339 | /* |
10340 | REVISION HISTORY |
10341 | ================ |
10342 | v0.12.28 - 2021-02-21 |
10343 | - Fix a warning due to referencing _MSC_VER when it is undefined. |
10344 | |
10345 | v0.12.27 - 2021-01-31 |
10346 | - Fix a static analysis warning. |
10347 | |
10348 | v0.12.26 - 2021-01-17 |
10349 | - Fix a compilation warning due to _BSD_SOURCE being deprecated. |
10350 | |
10351 | v0.12.25 - 2020-12-26 |
10352 | - Update documentation. |
10353 | |
10354 | v0.12.24 - 2020-11-29 |
10355 | - Fix ARM64/NEON detection when compiling with MSVC. |
10356 | |
10357 | v0.12.23 - 2020-11-21 |
10358 | - Fix compilation with OpenWatcom. |
10359 | |
10360 | v0.12.22 - 2020-11-01 |
10361 | - Fix an error with the previous release. |
10362 | |
10363 | v0.12.21 - 2020-11-01 |
10364 | - Fix a possible deadlock when seeking. |
10365 | - Improve compiler support for older versions of GCC. |
10366 | |
10367 | v0.12.20 - 2020-09-08 |
10368 | - Fix a compilation error on older compilers. |
10369 | |
10370 | v0.12.19 - 2020-08-30 |
10371 | - Fix a bug due to an undefined 32-bit shift. |
10372 | |
10373 | v0.12.18 - 2020-08-14 |
10374 | - Fix a crash when compiling with clang-cl. |
10375 | |
10376 | v0.12.17 - 2020-08-02 |
10377 | - Simplify sized types. |
10378 | |
10379 | v0.12.16 - 2020-07-25 |
10380 | - Fix a compilation warning. |
10381 | |
10382 | v0.12.15 - 2020-07-06 |
10383 | - Check for negative LPC shifts and return an error. |
10384 | |
10385 | v0.12.14 - 2020-06-23 |
10386 | - Add include guard for the implementation section. |
10387 | |
10388 | v0.12.13 - 2020-05-16 |
10389 | - Add compile-time and run-time version querying. |
10390 | - DRFLAC_VERSION_MINOR |
10391 | - DRFLAC_VERSION_MAJOR |
10392 | - DRFLAC_VERSION_REVISION |
10393 | - DRFLAC_VERSION_STRING |
10394 | - drflac_version() |
10395 | - drflac_version_string() |
10396 | |
10397 | v0.12.12 - 2020-04-30 |
10398 | - Fix compilation errors with VC6. |
10399 | |
10400 | v0.12.11 - 2020-04-19 |
10401 | - Fix some pedantic warnings. |
10402 | - Fix some undefined behaviour warnings. |
10403 | |
10404 | v0.12.10 - 2020-04-10 |
10405 | - Fix some bugs when trying to seek with an invalid seek table. |
10406 | |
10407 | v0.12.9 - 2020-04-05 |
10408 | - Fix warnings. |
10409 | |
10410 | v0.12.8 - 2020-04-04 |
10411 | - Add drflac_open_file_w() and drflac_open_file_with_metadata_w(). |
10412 | - Fix some static analysis warnings. |
10413 | - Minor documentation updates. |
10414 | |
10415 | v0.12.7 - 2020-03-14 |
10416 | - Fix compilation errors with VC6. |
10417 | |
10418 | v0.12.6 - 2020-03-07 |
10419 | - Fix compilation error with Visual Studio .NET 2003. |
10420 | |
10421 | v0.12.5 - 2020-01-30 |
10422 | - Silence some static analysis warnings. |
10423 | |
10424 | v0.12.4 - 2020-01-29 |
10425 | - Silence some static analysis warnings. |
10426 | |
10427 | v0.12.3 - 2019-12-02 |
10428 | - Fix some warnings when compiling with GCC and the -Og flag. |
10429 | - Fix a crash in out-of-memory situations. |
10430 | - Fix potential integer overflow bug. |
10431 | - Fix some static analysis warnings. |
10432 | - Fix a possible crash when using custom memory allocators without a custom realloc() implementation. |
10433 | - Fix a bug with binary search seeking where the bits per sample is not a multiple of 8. |
10434 | |
10435 | v0.12.2 - 2019-10-07 |
10436 | - Internal code clean up. |
10437 | |
10438 | v0.12.1 - 2019-09-29 |
10439 | - Fix some Clang Static Analyzer warnings. |
10440 | - Fix an unused variable warning. |
10441 | |
10442 | v0.12.0 - 2019-09-23 |
10443 | - API CHANGE: Add support for user defined memory allocation routines. This system allows the program to specify their own memory allocation |
10444 | routines with a user data pointer for client-specific contextual data. This adds an extra parameter to the end of the following APIs: |
10445 | - drflac_open() |
10446 | - drflac_open_relaxed() |
10447 | - drflac_open_with_metadata() |
10448 | - drflac_open_with_metadata_relaxed() |
10449 | - drflac_open_file() |
10450 | - drflac_open_file_with_metadata() |
10451 | - drflac_open_memory() |
10452 | - drflac_open_memory_with_metadata() |
10453 | - drflac_open_and_read_pcm_frames_s32() |
10454 | - drflac_open_and_read_pcm_frames_s16() |
10455 | - drflac_open_and_read_pcm_frames_f32() |
10456 | - drflac_open_file_and_read_pcm_frames_s32() |
10457 | - drflac_open_file_and_read_pcm_frames_s16() |
10458 | - drflac_open_file_and_read_pcm_frames_f32() |
10459 | - drflac_open_memory_and_read_pcm_frames_s32() |
10460 | - drflac_open_memory_and_read_pcm_frames_s16() |
10461 | - drflac_open_memory_and_read_pcm_frames_f32() |
10462 | Set this extra parameter to NULL to use defaults which is the same as the previous behaviour. Setting this NULL will use |
10463 | DRFLAC_MALLOC, DRFLAC_REALLOC and DRFLAC_FREE. |
10464 | - Remove deprecated APIs: |
10465 | - drflac_read_s32() |
10466 | - drflac_read_s16() |
10467 | - drflac_read_f32() |
10468 | - drflac_seek_to_sample() |
10469 | - drflac_open_and_decode_s32() |
10470 | - drflac_open_and_decode_s16() |
10471 | - drflac_open_and_decode_f32() |
10472 | - drflac_open_and_decode_file_s32() |
10473 | - drflac_open_and_decode_file_s16() |
10474 | - drflac_open_and_decode_file_f32() |
10475 | - drflac_open_and_decode_memory_s32() |
10476 | - drflac_open_and_decode_memory_s16() |
10477 | - drflac_open_and_decode_memory_f32() |
10478 | - Remove drflac.totalSampleCount which is now replaced with drflac.totalPCMFrameCount. You can emulate drflac.totalSampleCount |
10479 | by doing pFlac->totalPCMFrameCount*pFlac->channels. |
10480 | - Rename drflac.currentFrame to drflac.currentFLACFrame to remove ambiguity with PCM frames. |
10481 | - Fix errors when seeking to the end of a stream. |
10482 | - Optimizations to seeking. |
10483 | - SSE improvements and optimizations. |
10484 | - ARM NEON optimizations. |
10485 | - Optimizations to drflac_read_pcm_frames_s16(). |
10486 | - Optimizations to drflac_read_pcm_frames_s32(). |
10487 | |
10488 | v0.11.10 - 2019-06-26 |
10489 | - Fix a compiler error. |
10490 | |
10491 | v0.11.9 - 2019-06-16 |
10492 | - Silence some ThreadSanitizer warnings. |
10493 | |
10494 | v0.11.8 - 2019-05-21 |
10495 | - Fix warnings. |
10496 | |
10497 | v0.11.7 - 2019-05-06 |
10498 | - C89 fixes. |
10499 | |
10500 | v0.11.6 - 2019-05-05 |
10501 | - Add support for C89. |
10502 | - Fix a compiler warning when CRC is disabled. |
10503 | - Change license to choice of public domain or MIT-0. |
10504 | |
10505 | v0.11.5 - 2019-04-19 |
10506 | - Fix a compiler error with GCC. |
10507 | |
10508 | v0.11.4 - 2019-04-17 |
10509 | - Fix some warnings with GCC when compiling with -std=c99. |
10510 | |
10511 | v0.11.3 - 2019-04-07 |
10512 | - Silence warnings with GCC. |
10513 | |
10514 | v0.11.2 - 2019-03-10 |
10515 | - Fix a warning. |
10516 | |
10517 | v0.11.1 - 2019-02-17 |
10518 | - Fix a potential bug with seeking. |
10519 | |
10520 | v0.11.0 - 2018-12-16 |
10521 | - API CHANGE: Deprecated drflac_read_s32(), drflac_read_s16() and drflac_read_f32() and replaced them with |
10522 | drflac_read_pcm_frames_s32(), drflac_read_pcm_frames_s16() and drflac_read_pcm_frames_f32(). The new APIs take |
10523 | and return PCM frame counts instead of sample counts. To upgrade you will need to change the input count by |
10524 | dividing it by the channel count, and then do the same with the return value. |
10525 | - API_CHANGE: Deprecated drflac_seek_to_sample() and replaced with drflac_seek_to_pcm_frame(). Same rules as |
10526 | the changes to drflac_read_*() apply. |
10527 | - API CHANGE: Deprecated drflac_open_and_decode_*() and replaced with drflac_open_*_and_read_*(). Same rules as |
10528 | the changes to drflac_read_*() apply. |
10529 | - Optimizations. |
10530 | |
10531 | v0.10.0 - 2018-09-11 |
10532 | - Remove the DR_FLAC_NO_WIN32_IO option and the Win32 file IO functionality. If you need to use Win32 file IO you |
10533 | need to do it yourself via the callback API. |
10534 | - Fix the clang build. |
10535 | - Fix undefined behavior. |
10536 | - Fix errors with CUESHEET metdata blocks. |
10537 | - Add an API for iterating over each cuesheet track in the CUESHEET metadata block. This works the same way as the |
10538 | Vorbis comment API. |
10539 | - Other miscellaneous bug fixes, mostly relating to invalid FLAC streams. |
10540 | - Minor optimizations. |
10541 | |
10542 | v0.9.11 - 2018-08-29 |
10543 | - Fix a bug with sample reconstruction. |
10544 | |
10545 | v0.9.10 - 2018-08-07 |
10546 | - Improve 64-bit detection. |
10547 | |
10548 | v0.9.9 - 2018-08-05 |
10549 | - Fix C++ build on older versions of GCC. |
10550 | |
10551 | v0.9.8 - 2018-07-24 |
10552 | - Fix compilation errors. |
10553 | |
10554 | v0.9.7 - 2018-07-05 |
10555 | - Fix a warning. |
10556 | |
10557 | v0.9.6 - 2018-06-29 |
10558 | - Fix some typos. |
10559 | |
10560 | v0.9.5 - 2018-06-23 |
10561 | - Fix some warnings. |
10562 | |
10563 | v0.9.4 - 2018-06-14 |
10564 | - Optimizations to seeking. |
10565 | - Clean up. |
10566 | |
10567 | v0.9.3 - 2018-05-22 |
10568 | - Bug fix. |
10569 | |
10570 | v0.9.2 - 2018-05-12 |
10571 | - Fix a compilation error due to a missing break statement. |
10572 | |
10573 | v0.9.1 - 2018-04-29 |
10574 | - Fix compilation error with Clang. |
10575 | |
10576 | v0.9 - 2018-04-24 |
10577 | - Fix Clang build. |
10578 | - Start using major.minor.revision versioning. |
10579 | |
10580 | v0.8g - 2018-04-19 |
10581 | - Fix build on non-x86/x64 architectures. |
10582 | |
10583 | v0.8f - 2018-02-02 |
10584 | - Stop pretending to support changing rate/channels mid stream. |
10585 | |
10586 | v0.8e - 2018-02-01 |
10587 | - Fix a crash when the block size of a frame is larger than the maximum block size defined by the FLAC stream. |
10588 | - Fix a crash the the Rice partition order is invalid. |
10589 | |
10590 | v0.8d - 2017-09-22 |
10591 | - Add support for decoding streams with ID3 tags. ID3 tags are just skipped. |
10592 | |
10593 | v0.8c - 2017-09-07 |
10594 | - Fix warning on non-x86/x64 architectures. |
10595 | |
10596 | v0.8b - 2017-08-19 |
10597 | - Fix build on non-x86/x64 architectures. |
10598 | |
10599 | v0.8a - 2017-08-13 |
10600 | - A small optimization for the Clang build. |
10601 | |
10602 | v0.8 - 2017-08-12 |
10603 | - API CHANGE: Rename dr_* types to drflac_*. |
10604 | - Optimizations. This brings dr_flac back to about the same class of efficiency as the reference implementation. |
10605 | - Add support for custom implementations of malloc(), realloc(), etc. |
10606 | - Add CRC checking to Ogg encapsulated streams. |
10607 | - Fix VC++ 6 build. This is only for the C++ compiler. The C compiler is not currently supported. |
10608 | - Bug fixes. |
10609 | |
10610 | v0.7 - 2017-07-23 |
10611 | - Add support for opening a stream without a header block. To do this, use drflac_open_relaxed() / drflac_open_with_metadata_relaxed(). |
10612 | |
10613 | v0.6 - 2017-07-22 |
10614 | - Add support for recovering from invalid frames. With this change, dr_flac will simply skip over invalid frames as if they |
10615 | never existed. Frames are checked against their sync code, the CRC-8 of the frame header and the CRC-16 of the whole frame. |
10616 | |
10617 | v0.5 - 2017-07-16 |
10618 | - Fix typos. |
10619 | - Change drflac_bool* types to unsigned. |
10620 | - Add CRC checking. This makes dr_flac slower, but can be disabled with #define DR_FLAC_NO_CRC. |
10621 | |
10622 | v0.4f - 2017-03-10 |
10623 | - Fix a couple of bugs with the bitstreaming code. |
10624 | |
10625 | v0.4e - 2017-02-17 |
10626 | - Fix some warnings. |
10627 | |
10628 | v0.4d - 2016-12-26 |
10629 | - Add support for 32-bit floating-point PCM decoding. |
10630 | - Use drflac_int* and drflac_uint* sized types to improve compiler support. |
10631 | - Minor improvements to documentation. |
10632 | |
10633 | v0.4c - 2016-12-26 |
10634 | - Add support for signed 16-bit integer PCM decoding. |
10635 | |
10636 | v0.4b - 2016-10-23 |
10637 | - A minor change to drflac_bool8 and drflac_bool32 types. |
10638 | |
10639 | v0.4a - 2016-10-11 |
10640 | - Rename drBool32 to drflac_bool32 for styling consistency. |
10641 | |
10642 | v0.4 - 2016-09-29 |
10643 | - API/ABI CHANGE: Use fixed size 32-bit booleans instead of the built-in bool type. |
10644 | - API CHANGE: Rename drflac_open_and_decode*() to drflac_open_and_decode*_s32(). |
10645 | - API CHANGE: Swap the order of "channels" and "sampleRate" parameters in drflac_open_and_decode*(). Rationale for this is to |
10646 | keep it consistent with drflac_audio. |
10647 | |
10648 | v0.3f - 2016-09-21 |
10649 | - Fix a warning with GCC. |
10650 | |
10651 | v0.3e - 2016-09-18 |
10652 | - Fixed a bug where GCC 4.3+ was not getting properly identified. |
10653 | - Fixed a few typos. |
10654 | - Changed date formats to ISO 8601 (YYYY-MM-DD). |
10655 | |
10656 | v0.3d - 2016-06-11 |
10657 | - Minor clean up. |
10658 | |
10659 | v0.3c - 2016-05-28 |
10660 | - Fixed compilation error. |
10661 | |
10662 | v0.3b - 2016-05-16 |
10663 | - Fixed Linux/GCC build. |
10664 | - Updated documentation. |
10665 | |
10666 | v0.3a - 2016-05-15 |
10667 | - Minor fixes to documentation. |
10668 | |
10669 | v0.3 - 2016-05-11 |
10670 | - Optimizations. Now at about parity with the reference implementation on 32-bit builds. |
10671 | - Lots of clean up. |
10672 | |
10673 | v0.2b - 2016-05-10 |
10674 | - Bug fixes. |
10675 | |
10676 | v0.2a - 2016-05-10 |
10677 | - Made drflac_open_and_decode() more robust. |
10678 | - Removed an unused debugging variable |
10679 | |
10680 | v0.2 - 2016-05-09 |
10681 | - Added support for Ogg encapsulation. |
10682 | - API CHANGE. Have the onSeek callback take a third argument which specifies whether or not the seek |
10683 | should be relative to the start or the current position. Also changes the seeking rules such that |
10684 | seeking offsets will never be negative. |
10685 | - Have drflac_open_and_decode() fail gracefully if the stream has an unknown total sample count. |
10686 | |
10687 | v0.1b - 2016-05-07 |
10688 | - Properly close the file handle in drflac_open_file() and family when the decoder fails to initialize. |
10689 | - Removed a stale comment. |
10690 | |
10691 | v0.1a - 2016-05-05 |
10692 | - Minor formatting changes. |
10693 | - Fixed a warning on the GCC build. |
10694 | |
10695 | v0.1 - 2016-05-03 |
10696 | - Initial versioned release. |
10697 | */ |
10698 | |
10699 | /* |
10700 | This software is available as a choice of the following licenses. Choose |
10701 | whichever you prefer. |
10702 | |
10703 | =============================================================================== |
10704 | ALTERNATIVE 1 - Public Domain (www.unlicense.org) |
10705 | =============================================================================== |
10706 | This is free and unencumbered software released into the public domain. |
10707 | |
10708 | Anyone is free to copy, modify, publish, use, compile, sell, or distribute this |
10709 | software, either in source code form or as a compiled binary, for any purpose, |
10710 | commercial or non-commercial, and by any means. |
10711 | |
10712 | In jurisdictions that recognize copyright laws, the author or authors of this |
10713 | software dedicate any and all copyright interest in the software to the public |
10714 | domain. We make this dedication for the benefit of the public at large and to |
10715 | the detriment of our heirs and successors. We intend this dedication to be an |
10716 | overt act of relinquishment in perpetuity of all present and future rights to |
10717 | this software under copyright law. |
10718 | |
10719 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
10720 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
10721 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
10722 | AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
10723 | ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION |
10724 | WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
10725 | |
10726 | For more information, please refer to <http://unlicense.org/> |
10727 | |
10728 | =============================================================================== |
10729 | ALTERNATIVE 2 - MIT No Attribution |
10730 | =============================================================================== |
10731 | Copyright 2020 David Reid |
10732 | |
10733 | Permission is hereby granted, free of charge, to any person obtaining a copy of |
10734 | this software and associated documentation files (the "Software"), to deal in |
10735 | the Software without restriction, including without limitation the rights to |
10736 | use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies |
10737 | of the Software, and to permit persons to whom the Software is furnished to do |
10738 | so. |
10739 | |
10740 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
10741 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
10742 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
10743 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
10744 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
10745 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
10746 | SOFTWARE. |
10747 | */ |