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1 | /* |
2 | FLAC audio decoder. Choice of public domain or MIT-0. See license statements at the end of this file. |
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3 | dr_flac - v0.12.39 - 2022-09-17 |
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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 | |
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213 | #define DR_FLAC_NO_WCHAR |
214 | Disables all functions ending with `_w`. Use this if your compiler does not provide wchar.h. Not required if DR_FLAC_NO_STDIO is also defined. |
215 | |
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216 | |
217 | |
218 | Notes |
219 | ===== |
220 | - dr_flac does not support changing the sample rate nor channel count mid stream. |
221 | - dr_flac is not thread-safe, but its APIs can be called from any thread so long as you do your own synchronization. |
222 | - When using Ogg encapsulation, a corrupted metadata block will result in `drflac_open_with_metadata()` and `drflac_open()` returning inconsistent samples due |
223 | to differences in corrupted stream recorvery logic between the two APIs. |
224 | */ |
225 | |
226 | #ifndef dr_flac_h |
227 | #define dr_flac_h |
228 | |
229 | #ifdef __cplusplus |
230 | extern "C" { |
231 | #endif |
232 | |
233 | #define DRFLAC_STRINGIFY(x) #x |
234 | #define DRFLAC_XSTRINGIFY(x) DRFLAC_STRINGIFY(x) |
235 | |
236 | #define DRFLAC_VERSION_MAJOR 0 |
237 | #define DRFLAC_VERSION_MINOR 12 |
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238 | #define DRFLAC_VERSION_REVISION 39 |
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239 | #define DRFLAC_VERSION_STRING DRFLAC_XSTRINGIFY(DRFLAC_VERSION_MAJOR) "." DRFLAC_XSTRINGIFY(DRFLAC_VERSION_MINOR) "." DRFLAC_XSTRINGIFY(DRFLAC_VERSION_REVISION) |
240 | |
241 | #include <stddef.h> /* For size_t. */ |
242 | |
243 | /* Sized types. */ |
244 | typedef signed char drflac_int8; |
245 | typedef unsigned char drflac_uint8; |
246 | typedef signed short drflac_int16; |
247 | typedef unsigned short drflac_uint16; |
248 | typedef signed int drflac_int32; |
249 | typedef unsigned int drflac_uint32; |
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250 | #if defined(_MSC_VER) && !defined(__clang__) |
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251 | typedef signed __int64 drflac_int64; |
252 | typedef unsigned __int64 drflac_uint64; |
253 | #else |
254 | #if defined(__clang__) || (defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6))) |
255 | #pragma GCC diagnostic push |
256 | #pragma GCC diagnostic ignored "-Wlong-long" |
257 | #if defined(__clang__) |
258 | #pragma GCC diagnostic ignored "-Wc++11-long-long" |
259 | #endif |
260 | #endif |
261 | typedef signed long long drflac_int64; |
262 | typedef unsigned long long drflac_uint64; |
263 | #if defined(__clang__) || (defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6))) |
264 | #pragma GCC diagnostic pop |
265 | #endif |
266 | #endif |
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267 | #if defined(__LP64__) || defined(_WIN64) || (defined(__x86_64__) && !defined(__ILP32__)) || defined(_M_X64) || defined(__ia64) || defined(_M_IA64) || defined(__aarch64__) || defined(_M_ARM64) || defined(__powerpc64__) |
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268 | typedef drflac_uint64 drflac_uintptr; |
269 | #else |
270 | typedef drflac_uint32 drflac_uintptr; |
271 | #endif |
272 | typedef drflac_uint8 drflac_bool8; |
273 | typedef drflac_uint32 drflac_bool32; |
274 | #define DRFLAC_TRUE 1 |
275 | #define DRFLAC_FALSE 0 |
276 | |
277 | #if !defined(DRFLAC_API) |
278 | #if defined(DRFLAC_DLL) |
279 | #if defined(_WIN32) |
280 | #define DRFLAC_DLL_IMPORT __declspec(dllimport) |
281 | #define DRFLAC_DLL_EXPORT __declspec(dllexport) |
282 | #define DRFLAC_DLL_PRIVATE static |
283 | #else |
284 | #if defined(__GNUC__) && __GNUC__ >= 4 |
285 | #define DRFLAC_DLL_IMPORT __attribute__((visibility("default"))) |
286 | #define DRFLAC_DLL_EXPORT __attribute__((visibility("default"))) |
287 | #define DRFLAC_DLL_PRIVATE __attribute__((visibility("hidden"))) |
288 | #else |
289 | #define DRFLAC_DLL_IMPORT |
290 | #define DRFLAC_DLL_EXPORT |
291 | #define DRFLAC_DLL_PRIVATE static |
292 | #endif |
293 | #endif |
294 | |
295 | #if defined(DR_FLAC_IMPLEMENTATION) || defined(DRFLAC_IMPLEMENTATION) |
296 | #define DRFLAC_API DRFLAC_DLL_EXPORT |
297 | #else |
298 | #define DRFLAC_API DRFLAC_DLL_IMPORT |
299 | #endif |
300 | #define DRFLAC_PRIVATE DRFLAC_DLL_PRIVATE |
301 | #else |
302 | #define DRFLAC_API extern |
303 | #define DRFLAC_PRIVATE static |
304 | #endif |
305 | #endif |
306 | |
307 | #if defined(_MSC_VER) && _MSC_VER >= 1700 /* Visual Studio 2012 */ |
308 | #define DRFLAC_DEPRECATED __declspec(deprecated) |
309 | #elif (defined(__GNUC__) && __GNUC__ >= 4) /* GCC 4 */ |
310 | #define DRFLAC_DEPRECATED __attribute__((deprecated)) |
311 | #elif defined(__has_feature) /* Clang */ |
312 | #if __has_feature(attribute_deprecated) |
313 | #define DRFLAC_DEPRECATED __attribute__((deprecated)) |
314 | #else |
315 | #define DRFLAC_DEPRECATED |
316 | #endif |
317 | #else |
318 | #define DRFLAC_DEPRECATED |
319 | #endif |
320 | |
321 | DRFLAC_API void drflac_version(drflac_uint32* pMajor, drflac_uint32* pMinor, drflac_uint32* pRevision); |
322 | DRFLAC_API const char* drflac_version_string(void); |
323 | |
324 | /* |
325 | 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, |
326 | 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. |
327 | */ |
328 | #ifndef DR_FLAC_BUFFER_SIZE |
329 | #define DR_FLAC_BUFFER_SIZE 4096 |
330 | #endif |
331 | |
332 | /* Check if we can enable 64-bit optimizations. */ |
333 | #if defined(_WIN64) || defined(_LP64) || defined(__LP64__) |
334 | #define DRFLAC_64BIT |
335 | #endif |
336 | |
337 | #ifdef DRFLAC_64BIT |
338 | typedef drflac_uint64 drflac_cache_t; |
339 | #else |
340 | typedef drflac_uint32 drflac_cache_t; |
341 | #endif |
342 | |
343 | /* The various metadata block types. */ |
344 | #define DRFLAC_METADATA_BLOCK_TYPE_STREAMINFO 0 |
345 | #define DRFLAC_METADATA_BLOCK_TYPE_PADDING 1 |
346 | #define DRFLAC_METADATA_BLOCK_TYPE_APPLICATION 2 |
347 | #define DRFLAC_METADATA_BLOCK_TYPE_SEEKTABLE 3 |
348 | #define DRFLAC_METADATA_BLOCK_TYPE_VORBIS_COMMENT 4 |
349 | #define DRFLAC_METADATA_BLOCK_TYPE_CUESHEET 5 |
350 | #define DRFLAC_METADATA_BLOCK_TYPE_PICTURE 6 |
351 | #define DRFLAC_METADATA_BLOCK_TYPE_INVALID 127 |
352 | |
353 | /* The various picture types specified in the PICTURE block. */ |
354 | #define DRFLAC_PICTURE_TYPE_OTHER 0 |
355 | #define DRFLAC_PICTURE_TYPE_FILE_ICON 1 |
356 | #define DRFLAC_PICTURE_TYPE_OTHER_FILE_ICON 2 |
357 | #define DRFLAC_PICTURE_TYPE_COVER_FRONT 3 |
358 | #define DRFLAC_PICTURE_TYPE_COVER_BACK 4 |
359 | #define DRFLAC_PICTURE_TYPE_LEAFLET_PAGE 5 |
360 | #define DRFLAC_PICTURE_TYPE_MEDIA 6 |
361 | #define DRFLAC_PICTURE_TYPE_LEAD_ARTIST 7 |
362 | #define DRFLAC_PICTURE_TYPE_ARTIST 8 |
363 | #define DRFLAC_PICTURE_TYPE_CONDUCTOR 9 |
364 | #define DRFLAC_PICTURE_TYPE_BAND 10 |
365 | #define DRFLAC_PICTURE_TYPE_COMPOSER 11 |
366 | #define DRFLAC_PICTURE_TYPE_LYRICIST 12 |
367 | #define DRFLAC_PICTURE_TYPE_RECORDING_LOCATION 13 |
368 | #define DRFLAC_PICTURE_TYPE_DURING_RECORDING 14 |
369 | #define DRFLAC_PICTURE_TYPE_DURING_PERFORMANCE 15 |
370 | #define DRFLAC_PICTURE_TYPE_SCREEN_CAPTURE 16 |
371 | #define DRFLAC_PICTURE_TYPE_BRIGHT_COLORED_FISH 17 |
372 | #define DRFLAC_PICTURE_TYPE_ILLUSTRATION 18 |
373 | #define DRFLAC_PICTURE_TYPE_BAND_LOGOTYPE 19 |
374 | #define DRFLAC_PICTURE_TYPE_PUBLISHER_LOGOTYPE 20 |
375 | |
376 | typedef enum |
377 | { |
378 | drflac_container_native, |
379 | drflac_container_ogg, |
380 | drflac_container_unknown |
381 | } drflac_container; |
382 | |
383 | typedef enum |
384 | { |
385 | drflac_seek_origin_start, |
386 | drflac_seek_origin_current |
387 | } drflac_seek_origin; |
388 | |
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389 | /* The order of members in this structure is important because we map this directly to the raw data within the SEEKTABLE metadata block. */ |
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390 | typedef struct |
391 | { |
392 | drflac_uint64 firstPCMFrame; |
393 | drflac_uint64 flacFrameOffset; /* The offset from the first byte of the header of the first frame. */ |
394 | drflac_uint16 pcmFrameCount; |
395 | } drflac_seekpoint; |
2ff0b512 |
396 | |
397 | typedef struct |
398 | { |
399 | drflac_uint16 minBlockSizeInPCMFrames; |
400 | drflac_uint16 maxBlockSizeInPCMFrames; |
401 | drflac_uint32 minFrameSizeInPCMFrames; |
402 | drflac_uint32 maxFrameSizeInPCMFrames; |
403 | drflac_uint32 sampleRate; |
404 | drflac_uint8 channels; |
405 | drflac_uint8 bitsPerSample; |
406 | drflac_uint64 totalPCMFrameCount; |
407 | drflac_uint8 md5[16]; |
408 | } drflac_streaminfo; |
409 | |
410 | typedef struct |
411 | { |
412 | /* |
413 | The metadata type. Use this to know how to interpret the data below. Will be set to one of the |
414 | DRFLAC_METADATA_BLOCK_TYPE_* tokens. |
415 | */ |
416 | drflac_uint32 type; |
417 | |
418 | /* |
419 | A pointer to the raw data. This points to a temporary buffer so don't hold on to it. It's best to |
420 | not modify the contents of this buffer. Use the structures below for more meaningful and structured |
421 | information about the metadata. It's possible for this to be null. |
422 | */ |
423 | const void* pRawData; |
424 | |
425 | /* The size in bytes of the block and the buffer pointed to by pRawData if it's non-NULL. */ |
426 | drflac_uint32 rawDataSize; |
427 | |
428 | union |
429 | { |
430 | drflac_streaminfo streaminfo; |
431 | |
432 | struct |
433 | { |
434 | int unused; |
435 | } padding; |
436 | |
437 | struct |
438 | { |
439 | drflac_uint32 id; |
440 | const void* pData; |
441 | drflac_uint32 dataSize; |
442 | } application; |
443 | |
444 | struct |
445 | { |
446 | drflac_uint32 seekpointCount; |
447 | const drflac_seekpoint* pSeekpoints; |
448 | } seektable; |
449 | |
450 | struct |
451 | { |
452 | drflac_uint32 vendorLength; |
453 | const char* vendor; |
454 | drflac_uint32 commentCount; |
455 | const void* pComments; |
456 | } vorbis_comment; |
457 | |
458 | struct |
459 | { |
460 | char catalog[128]; |
461 | drflac_uint64 leadInSampleCount; |
462 | drflac_bool32 isCD; |
463 | drflac_uint8 trackCount; |
464 | const void* pTrackData; |
465 | } cuesheet; |
466 | |
467 | struct |
468 | { |
469 | drflac_uint32 type; |
470 | drflac_uint32 mimeLength; |
471 | const char* mime; |
472 | drflac_uint32 descriptionLength; |
473 | const char* description; |
474 | drflac_uint32 width; |
475 | drflac_uint32 height; |
476 | drflac_uint32 colorDepth; |
477 | drflac_uint32 indexColorCount; |
478 | drflac_uint32 pictureDataSize; |
479 | const drflac_uint8* pPictureData; |
480 | } picture; |
481 | } data; |
482 | } drflac_metadata; |
483 | |
484 | |
485 | /* |
486 | Callback for when data needs to be read from the client. |
487 | |
488 | |
489 | Parameters |
490 | ---------- |
491 | pUserData (in) |
492 | The user data that was passed to drflac_open() and family. |
493 | |
494 | pBufferOut (out) |
495 | The output buffer. |
496 | |
497 | bytesToRead (in) |
498 | The number of bytes to read. |
499 | |
500 | |
501 | Return Value |
502 | ------------ |
503 | The number of bytes actually read. |
504 | |
505 | |
506 | Remarks |
507 | ------- |
508 | 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 |
509 | you have reached the end of the stream. |
510 | */ |
511 | typedef size_t (* drflac_read_proc)(void* pUserData, void* pBufferOut, size_t bytesToRead); |
512 | |
513 | /* |
514 | Callback for when data needs to be seeked. |
515 | |
516 | |
517 | Parameters |
518 | ---------- |
519 | pUserData (in) |
520 | The user data that was passed to drflac_open() and family. |
521 | |
522 | offset (in) |
523 | The number of bytes to move, relative to the origin. Will never be negative. |
524 | |
525 | origin (in) |
526 | The origin of the seek - the current position or the start of the stream. |
527 | |
528 | |
529 | Return Value |
530 | ------------ |
531 | Whether or not the seek was successful. |
532 | |
533 | |
534 | Remarks |
535 | ------- |
536 | 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 |
537 | either drflac_seek_origin_start or drflac_seek_origin_current. |
538 | |
539 | 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 |
540 | and handled by returning DRFLAC_FALSE. |
541 | */ |
542 | typedef drflac_bool32 (* drflac_seek_proc)(void* pUserData, int offset, drflac_seek_origin origin); |
543 | |
544 | /* |
545 | Callback for when a metadata block is read. |
546 | |
547 | |
548 | Parameters |
549 | ---------- |
550 | pUserData (in) |
551 | The user data that was passed to drflac_open() and family. |
552 | |
553 | pMetadata (in) |
554 | A pointer to a structure containing the data of the metadata block. |
555 | |
556 | |
557 | Remarks |
558 | ------- |
559 | Use pMetadata->type to determine which metadata block is being handled and how to read the data. This |
560 | will be set to one of the DRFLAC_METADATA_BLOCK_TYPE_* tokens. |
561 | */ |
562 | typedef void (* drflac_meta_proc)(void* pUserData, drflac_metadata* pMetadata); |
563 | |
564 | |
565 | typedef struct |
566 | { |
567 | void* pUserData; |
568 | void* (* onMalloc)(size_t sz, void* pUserData); |
569 | void* (* onRealloc)(void* p, size_t sz, void* pUserData); |
570 | void (* onFree)(void* p, void* pUserData); |
571 | } drflac_allocation_callbacks; |
572 | |
573 | /* Structure for internal use. Only used for decoders opened with drflac_open_memory. */ |
574 | typedef struct |
575 | { |
576 | const drflac_uint8* data; |
577 | size_t dataSize; |
578 | size_t currentReadPos; |
579 | } drflac__memory_stream; |
580 | |
581 | /* Structure for internal use. Used for bit streaming. */ |
582 | typedef struct |
583 | { |
584 | /* The function to call when more data needs to be read. */ |
585 | drflac_read_proc onRead; |
586 | |
587 | /* The function to call when the current read position needs to be moved. */ |
588 | drflac_seek_proc onSeek; |
589 | |
590 | /* The user data to pass around to onRead and onSeek. */ |
591 | void* pUserData; |
592 | |
593 | |
594 | /* |
595 | 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 |
596 | 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 |
597 | 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). |
598 | */ |
599 | size_t unalignedByteCount; |
600 | |
601 | /* The content of the unaligned bytes. */ |
602 | drflac_cache_t unalignedCache; |
603 | |
604 | /* The index of the next valid cache line in the "L2" cache. */ |
605 | drflac_uint32 nextL2Line; |
606 | |
607 | /* The number of bits that have been consumed by the cache. This is used to determine how many valid bits are remaining. */ |
608 | drflac_uint32 consumedBits; |
609 | |
610 | /* |
611 | The cached data which was most recently read from the client. There are two levels of cache. Data flows as such: |
612 | Client -> L2 -> L1. The L2 -> L1 movement is aligned and runs on a fast path in just a few instructions. |
613 | */ |
614 | drflac_cache_t cacheL2[DR_FLAC_BUFFER_SIZE/sizeof(drflac_cache_t)]; |
615 | drflac_cache_t cache; |
616 | |
617 | /* |
618 | 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 |
619 | is reset to 0 at the beginning of each frame. |
620 | */ |
621 | drflac_uint16 crc16; |
622 | drflac_cache_t crc16Cache; /* A cache for optimizing CRC calculations. This is filled when when the L1 cache is reloaded. */ |
623 | drflac_uint32 crc16CacheIgnoredBytes; /* The number of bytes to ignore when updating the CRC-16 from the CRC-16 cache. */ |
624 | } drflac_bs; |
625 | |
626 | typedef struct |
627 | { |
628 | /* The type of the subframe: SUBFRAME_CONSTANT, SUBFRAME_VERBATIM, SUBFRAME_FIXED or SUBFRAME_LPC. */ |
629 | drflac_uint8 subframeType; |
630 | |
631 | /* The number of wasted bits per sample as specified by the sub-frame header. */ |
632 | drflac_uint8 wastedBitsPerSample; |
633 | |
634 | /* The order to use for the prediction stage for SUBFRAME_FIXED and SUBFRAME_LPC. */ |
635 | drflac_uint8 lpcOrder; |
636 | |
637 | /* A pointer to the buffer containing the decoded samples in the subframe. This pointer is an offset from drflac::pExtraData. */ |
638 | drflac_int32* pSamplesS32; |
639 | } drflac_subframe; |
640 | |
641 | typedef struct |
642 | { |
643 | /* |
644 | 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 |
645 | always be set to 0. This is 64-bit because the decoded PCM frame number will be 36 bits. |
646 | */ |
647 | drflac_uint64 pcmFrameNumber; |
648 | |
649 | /* |
650 | 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 |
651 | is 32-bit because in fixed block sizes, the maximum frame number will be 31 bits. |
652 | */ |
653 | drflac_uint32 flacFrameNumber; |
654 | |
655 | /* The sample rate of this frame. */ |
656 | drflac_uint32 sampleRate; |
657 | |
658 | /* The number of PCM frames in each sub-frame within this frame. */ |
659 | drflac_uint16 blockSizeInPCMFrames; |
660 | |
661 | /* |
662 | The channel assignment of this frame. This is not always set to the channel count. If interchannel decorrelation is being used this |
663 | will be set to DRFLAC_CHANNEL_ASSIGNMENT_LEFT_SIDE, DRFLAC_CHANNEL_ASSIGNMENT_RIGHT_SIDE or DRFLAC_CHANNEL_ASSIGNMENT_MID_SIDE. |
664 | */ |
665 | drflac_uint8 channelAssignment; |
666 | |
667 | /* The number of bits per sample within this frame. */ |
668 | drflac_uint8 bitsPerSample; |
669 | |
670 | /* The frame's CRC. */ |
671 | drflac_uint8 crc8; |
672 | } drflac_frame_header; |
673 | |
674 | typedef struct |
675 | { |
676 | /* The header. */ |
677 | drflac_frame_header header; |
678 | |
679 | /* |
680 | 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, |
681 | this will be decremented. When it reaches 0, the decoder will see this frame as fully consumed and load the next frame. |
682 | */ |
683 | drflac_uint32 pcmFramesRemaining; |
684 | |
685 | /* The list of sub-frames within the frame. There is one sub-frame for each channel, and there's a maximum of 8 channels. */ |
686 | drflac_subframe subframes[8]; |
687 | } drflac_frame; |
688 | |
689 | typedef struct |
690 | { |
691 | /* The function to call when a metadata block is read. */ |
692 | drflac_meta_proc onMeta; |
693 | |
694 | /* The user data posted to the metadata callback function. */ |
695 | void* pUserDataMD; |
696 | |
697 | /* Memory allocation callbacks. */ |
698 | drflac_allocation_callbacks allocationCallbacks; |
699 | |
700 | |
701 | /* The sample rate. Will be set to something like 44100. */ |
702 | drflac_uint32 sampleRate; |
703 | |
704 | /* |
705 | 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 |
706 | value specified in the STREAMINFO block. |
707 | */ |
708 | drflac_uint8 channels; |
709 | |
710 | /* The bits per sample. Will be set to something like 16, 24, etc. */ |
711 | drflac_uint8 bitsPerSample; |
712 | |
713 | /* The maximum block size, in samples. This number represents the number of samples in each channel (not combined). */ |
714 | drflac_uint16 maxBlockSizeInPCMFrames; |
715 | |
716 | /* |
717 | 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 |
718 | the total PCM frame count is unknown. Likely the case with streams like internet radio. |
719 | */ |
720 | drflac_uint64 totalPCMFrameCount; |
721 | |
722 | |
723 | /* The container type. This is set based on whether or not the decoder was opened from a native or Ogg stream. */ |
724 | drflac_container container; |
725 | |
726 | /* The number of seekpoints in the seektable. */ |
727 | drflac_uint32 seekpointCount; |
728 | |
729 | |
730 | /* Information about the frame the decoder is currently sitting on. */ |
731 | drflac_frame currentFLACFrame; |
732 | |
733 | |
734 | /* The index of the PCM frame the decoder is currently sitting on. This is only used for seeking. */ |
735 | drflac_uint64 currentPCMFrame; |
736 | |
737 | /* The position of the first FLAC frame in the stream. This is only ever used for seeking. */ |
738 | drflac_uint64 firstFLACFramePosInBytes; |
739 | |
740 | |
741 | /* A hack to avoid a malloc() when opening a decoder with drflac_open_memory(). */ |
742 | drflac__memory_stream memoryStream; |
743 | |
744 | |
745 | /* A pointer to the decoded sample data. This is an offset of pExtraData. */ |
746 | drflac_int32* pDecodedSamples; |
747 | |
748 | /* A pointer to the seek table. This is an offset of pExtraData, or NULL if there is no seek table. */ |
749 | drflac_seekpoint* pSeekpoints; |
750 | |
751 | /* Internal use only. Only used with Ogg containers. Points to a drflac_oggbs object. This is an offset of pExtraData. */ |
752 | void* _oggbs; |
753 | |
754 | /* Internal use only. Used for profiling and testing different seeking modes. */ |
755 | drflac_bool32 _noSeekTableSeek : 1; |
756 | drflac_bool32 _noBinarySearchSeek : 1; |
757 | drflac_bool32 _noBruteForceSeek : 1; |
758 | |
759 | /* The bit streamer. The raw FLAC data is fed through this object. */ |
760 | drflac_bs bs; |
761 | |
762 | /* Variable length extra data. We attach this to the end of the object so we can avoid unnecessary mallocs. */ |
763 | drflac_uint8 pExtraData[1]; |
764 | } drflac; |
765 | |
766 | |
767 | /* |
768 | Opens a FLAC decoder. |
769 | |
770 | |
771 | Parameters |
772 | ---------- |
773 | onRead (in) |
774 | The function to call when data needs to be read from the client. |
775 | |
776 | onSeek (in) |
777 | The function to call when the read position of the client data needs to move. |
778 | |
779 | pUserData (in, optional) |
780 | A pointer to application defined data that will be passed to onRead and onSeek. |
781 | |
782 | pAllocationCallbacks (in, optional) |
783 | A pointer to application defined callbacks for managing memory allocations. |
784 | |
785 | |
786 | Return Value |
787 | ------------ |
788 | Returns a pointer to an object representing the decoder. |
789 | |
790 | |
791 | Remarks |
792 | ------- |
793 | Close the decoder with `drflac_close()`. |
794 | |
795 | `pAllocationCallbacks` can be NULL in which case it will use `DRFLAC_MALLOC`, `DRFLAC_REALLOC` and `DRFLAC_FREE`. |
796 | |
797 | 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 |
798 | without any manual intervention. Ogg encapsulation also works with multiplexed streams which basically means it can play FLAC encoded audio tracks in videos. |
799 | |
800 | 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 |
801 | from a block of memory respectively. |
802 | |
803 | 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. |
804 | |
805 | Use `drflac_open_with_metadata()` if you need access to metadata. |
806 | |
807 | |
808 | Seek Also |
809 | --------- |
810 | drflac_open_file() |
811 | drflac_open_memory() |
812 | drflac_open_with_metadata() |
813 | drflac_close() |
814 | */ |
815 | DRFLAC_API drflac* drflac_open(drflac_read_proc onRead, drflac_seek_proc onSeek, void* pUserData, const drflac_allocation_callbacks* pAllocationCallbacks); |
816 | |
817 | /* |
818 | Opens a FLAC stream with relaxed validation of the header block. |
819 | |
820 | |
821 | Parameters |
822 | ---------- |
823 | onRead (in) |
824 | The function to call when data needs to be read from the client. |
825 | |
826 | onSeek (in) |
827 | The function to call when the read position of the client data needs to move. |
828 | |
829 | container (in) |
830 | Whether or not the FLAC stream is encapsulated using standard FLAC encapsulation or Ogg encapsulation. |
831 | |
832 | pUserData (in, optional) |
833 | A pointer to application defined data that will be passed to onRead and onSeek. |
834 | |
835 | pAllocationCallbacks (in, optional) |
836 | A pointer to application defined callbacks for managing memory allocations. |
837 | |
838 | |
839 | Return Value |
840 | ------------ |
841 | A pointer to an object representing the decoder. |
842 | |
843 | |
844 | Remarks |
845 | ------- |
846 | The same as drflac_open(), except attempts to open the stream even when a header block is not present. |
847 | |
848 | 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` |
849 | as that is for internal use only. |
850 | |
851 | 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, |
852 | force your `onRead` callback to return 0, which dr_flac will use as an indicator that the end of the stream was found. |
853 | |
854 | Use `drflac_open_with_metadata_relaxed()` if you need access to metadata. |
855 | */ |
856 | DRFLAC_API drflac* drflac_open_relaxed(drflac_read_proc onRead, drflac_seek_proc onSeek, drflac_container container, void* pUserData, const drflac_allocation_callbacks* pAllocationCallbacks); |
857 | |
858 | /* |
859 | Opens a FLAC decoder and notifies the caller of the metadata chunks (album art, etc.). |
860 | |
861 | |
862 | Parameters |
863 | ---------- |
864 | onRead (in) |
865 | The function to call when data needs to be read from the client. |
866 | |
867 | onSeek (in) |
868 | The function to call when the read position of the client data needs to move. |
869 | |
870 | onMeta (in) |
871 | The function to call for every metadata block. |
872 | |
873 | pUserData (in, optional) |
874 | A pointer to application defined data that will be passed to onRead, onSeek and onMeta. |
875 | |
876 | pAllocationCallbacks (in, optional) |
877 | A pointer to application defined callbacks for managing memory allocations. |
878 | |
879 | |
880 | Return Value |
881 | ------------ |
882 | A pointer to an object representing the decoder. |
883 | |
884 | |
885 | Remarks |
886 | ------- |
887 | Close the decoder with `drflac_close()`. |
888 | |
889 | `pAllocationCallbacks` can be NULL in which case it will use `DRFLAC_MALLOC`, `DRFLAC_REALLOC` and `DRFLAC_FREE`. |
890 | |
891 | 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 |
892 | metadata block except for STREAMINFO and PADDING blocks. |
893 | |
894 | 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 |
895 | 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 |
896 | the different metadata types. |
897 | |
898 | 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. |
899 | |
900 | 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 |
901 | 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 |
902 | metadata block, whereas `drflac_open()` will simply seek past it (for the sake of efficiency). This inconsistency can result in different samples being |
903 | returned depending on whether or not the stream is being opened with metadata. |
904 | |
905 | |
906 | Seek Also |
907 | --------- |
908 | drflac_open_file_with_metadata() |
909 | drflac_open_memory_with_metadata() |
910 | drflac_open() |
911 | drflac_close() |
912 | */ |
913 | 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); |
914 | |
915 | /* |
916 | The same as drflac_open_with_metadata(), except attempts to open the stream even when a header block is not present. |
917 | |
918 | See Also |
919 | -------- |
920 | drflac_open_with_metadata() |
921 | drflac_open_relaxed() |
922 | */ |
923 | 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); |
924 | |
925 | /* |
926 | Closes the given FLAC decoder. |
927 | |
928 | |
929 | Parameters |
930 | ---------- |
931 | pFlac (in) |
932 | The decoder to close. |
933 | |
934 | |
935 | Remarks |
936 | ------- |
937 | This will destroy the decoder object. |
938 | |
939 | |
940 | See Also |
941 | -------- |
942 | drflac_open() |
943 | drflac_open_with_metadata() |
944 | drflac_open_file() |
945 | drflac_open_file_w() |
946 | drflac_open_file_with_metadata() |
947 | drflac_open_file_with_metadata_w() |
948 | drflac_open_memory() |
949 | drflac_open_memory_with_metadata() |
950 | */ |
951 | DRFLAC_API void drflac_close(drflac* pFlac); |
952 | |
953 | |
954 | /* |
955 | Reads sample data from the given FLAC decoder, output as interleaved signed 32-bit PCM. |
956 | |
957 | |
958 | Parameters |
959 | ---------- |
960 | pFlac (in) |
961 | The decoder. |
962 | |
963 | framesToRead (in) |
964 | The number of PCM frames to read. |
965 | |
966 | pBufferOut (out, optional) |
967 | A pointer to the buffer that will receive the decoded samples. |
968 | |
969 | |
970 | Return Value |
971 | ------------ |
972 | Returns the number of PCM frames actually read. If the return value is less than `framesToRead` it has reached the end. |
973 | |
974 | |
975 | Remarks |
976 | ------- |
977 | 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. |
978 | */ |
979 | DRFLAC_API drflac_uint64 drflac_read_pcm_frames_s32(drflac* pFlac, drflac_uint64 framesToRead, drflac_int32* pBufferOut); |
980 | |
981 | |
982 | /* |
983 | Reads sample data from the given FLAC decoder, output as interleaved signed 16-bit PCM. |
984 | |
985 | |
986 | Parameters |
987 | ---------- |
988 | pFlac (in) |
989 | The decoder. |
990 | |
991 | framesToRead (in) |
992 | The number of PCM frames to read. |
993 | |
994 | pBufferOut (out, optional) |
995 | A pointer to the buffer that will receive the decoded samples. |
996 | |
997 | |
998 | Return Value |
999 | ------------ |
1000 | Returns the number of PCM frames actually read. If the return value is less than `framesToRead` it has reached the end. |
1001 | |
1002 | |
1003 | Remarks |
1004 | ------- |
1005 | 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. |
1006 | |
1007 | Note that this is lossy for streams where the bits per sample is larger than 16. |
1008 | */ |
1009 | DRFLAC_API drflac_uint64 drflac_read_pcm_frames_s16(drflac* pFlac, drflac_uint64 framesToRead, drflac_int16* pBufferOut); |
1010 | |
1011 | /* |
1012 | Reads sample data from the given FLAC decoder, output as interleaved 32-bit floating point PCM. |
1013 | |
1014 | |
1015 | Parameters |
1016 | ---------- |
1017 | pFlac (in) |
1018 | The decoder. |
1019 | |
1020 | framesToRead (in) |
1021 | The number of PCM frames to read. |
1022 | |
1023 | pBufferOut (out, optional) |
1024 | A pointer to the buffer that will receive the decoded samples. |
1025 | |
1026 | |
1027 | Return Value |
1028 | ------------ |
1029 | Returns the number of PCM frames actually read. If the return value is less than `framesToRead` it has reached the end. |
1030 | |
1031 | |
1032 | Remarks |
1033 | ------- |
1034 | 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. |
1035 | |
1036 | Note that this should be considered lossy due to the nature of floating point numbers not being able to exactly represent every possible number. |
1037 | */ |
1038 | DRFLAC_API drflac_uint64 drflac_read_pcm_frames_f32(drflac* pFlac, drflac_uint64 framesToRead, float* pBufferOut); |
1039 | |
1040 | /* |
1041 | Seeks to the PCM frame at the given index. |
1042 | |
1043 | |
1044 | Parameters |
1045 | ---------- |
1046 | pFlac (in) |
1047 | The decoder. |
1048 | |
1049 | pcmFrameIndex (in) |
1050 | The index of the PCM frame to seek to. See notes below. |
1051 | |
1052 | |
1053 | Return Value |
1054 | ------------- |
1055 | `DRFLAC_TRUE` if successful; `DRFLAC_FALSE` otherwise. |
1056 | */ |
1057 | DRFLAC_API drflac_bool32 drflac_seek_to_pcm_frame(drflac* pFlac, drflac_uint64 pcmFrameIndex); |
1058 | |
9e052883 |
1059 | |
1060 | |
1061 | #ifndef DR_FLAC_NO_STDIO |
1062 | /* |
1063 | Opens a FLAC decoder from the file at the given path. |
1064 | |
1065 | |
1066 | Parameters |
1067 | ---------- |
1068 | pFileName (in) |
1069 | The path of the file to open, either absolute or relative to the current directory. |
1070 | |
1071 | pAllocationCallbacks (in, optional) |
1072 | A pointer to application defined callbacks for managing memory allocations. |
1073 | |
1074 | |
1075 | Return Value |
1076 | ------------ |
1077 | A pointer to an object representing the decoder. |
1078 | |
1079 | |
1080 | Remarks |
1081 | ------- |
1082 | Close the decoder with drflac_close(). |
1083 | |
1084 | |
1085 | Remarks |
1086 | ------- |
1087 | This will hold a handle to the file until the decoder is closed with drflac_close(). Some platforms will restrict the number of files a process can have open |
1088 | at any given time, so keep this mind if you have many decoders open at the same time. |
1089 | |
1090 | |
1091 | See Also |
1092 | -------- |
1093 | drflac_open_file_with_metadata() |
1094 | drflac_open() |
1095 | drflac_close() |
1096 | */ |
1097 | DRFLAC_API drflac* drflac_open_file(const char* pFileName, const drflac_allocation_callbacks* pAllocationCallbacks); |
1098 | DRFLAC_API drflac* drflac_open_file_w(const wchar_t* pFileName, const drflac_allocation_callbacks* pAllocationCallbacks); |
1099 | |
1100 | /* |
1101 | Opens a FLAC decoder from the file at the given path and notifies the caller of the metadata chunks (album art, etc.) |
1102 | |
1103 | |
1104 | Parameters |
1105 | ---------- |
1106 | pFileName (in) |
1107 | The path of the file to open, either absolute or relative to the current directory. |
1108 | |
1109 | pAllocationCallbacks (in, optional) |
1110 | A pointer to application defined callbacks for managing memory allocations. |
1111 | |
1112 | onMeta (in) |
1113 | The callback to fire for each metadata block. |
1114 | |
1115 | pUserData (in) |
1116 | A pointer to the user data to pass to the metadata callback. |
1117 | |
1118 | pAllocationCallbacks (in) |
1119 | A pointer to application defined callbacks for managing memory allocations. |
1120 | |
1121 | |
1122 | Remarks |
1123 | ------- |
1124 | Look at the documentation for drflac_open_with_metadata() for more information on how metadata is handled. |
1125 | |
1126 | |
1127 | See Also |
1128 | -------- |
1129 | drflac_open_with_metadata() |
1130 | drflac_open() |
1131 | drflac_close() |
1132 | */ |
1133 | DRFLAC_API drflac* drflac_open_file_with_metadata(const char* pFileName, drflac_meta_proc onMeta, void* pUserData, const drflac_allocation_callbacks* pAllocationCallbacks); |
1134 | DRFLAC_API drflac* drflac_open_file_with_metadata_w(const wchar_t* pFileName, drflac_meta_proc onMeta, void* pUserData, const drflac_allocation_callbacks* pAllocationCallbacks); |
1135 | #endif |
1136 | |
2ff0b512 |
1137 | /* |
1138 | Opens a FLAC decoder from a pre-allocated block of memory |
1139 | |
1140 | |
1141 | Parameters |
1142 | ---------- |
1143 | pData (in) |
1144 | A pointer to the raw encoded FLAC data. |
1145 | |
1146 | dataSize (in) |
1147 | The size in bytes of `data`. |
1148 | |
1149 | pAllocationCallbacks (in) |
1150 | A pointer to application defined callbacks for managing memory allocations. |
1151 | |
1152 | |
1153 | Return Value |
1154 | ------------ |
1155 | A pointer to an object representing the decoder. |
1156 | |
1157 | |
1158 | Remarks |
1159 | ------- |
1160 | 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. |
1161 | |
1162 | |
1163 | See Also |
1164 | -------- |
1165 | drflac_open() |
1166 | drflac_close() |
1167 | */ |
1168 | DRFLAC_API drflac* drflac_open_memory(const void* pData, size_t dataSize, const drflac_allocation_callbacks* pAllocationCallbacks); |
1169 | |
1170 | /* |
1171 | Opens a FLAC decoder from a pre-allocated block of memory and notifies the caller of the metadata chunks (album art, etc.) |
1172 | |
1173 | |
1174 | Parameters |
1175 | ---------- |
1176 | pData (in) |
1177 | A pointer to the raw encoded FLAC data. |
1178 | |
1179 | dataSize (in) |
1180 | The size in bytes of `data`. |
1181 | |
1182 | onMeta (in) |
1183 | The callback to fire for each metadata block. |
1184 | |
1185 | pUserData (in) |
1186 | A pointer to the user data to pass to the metadata callback. |
1187 | |
1188 | pAllocationCallbacks (in) |
1189 | A pointer to application defined callbacks for managing memory allocations. |
1190 | |
1191 | |
1192 | Remarks |
1193 | ------- |
1194 | Look at the documentation for drflac_open_with_metadata() for more information on how metadata is handled. |
1195 | |
1196 | |
1197 | See Also |
1198 | ------- |
1199 | drflac_open_with_metadata() |
1200 | drflac_open() |
1201 | drflac_close() |
1202 | */ |
1203 | 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); |
1204 | |
1205 | |
1206 | |
1207 | /* High Level APIs */ |
1208 | |
1209 | /* |
1210 | Opens a FLAC stream from the given callbacks and fully decodes it in a single operation. The return value is a |
1211 | pointer to the sample data as interleaved signed 32-bit PCM. The returned data must be freed with drflac_free(). |
1212 | |
1213 | You can pass in custom memory allocation callbacks via the pAllocationCallbacks parameter. This can be NULL in which |
1214 | case it will use DRFLAC_MALLOC, DRFLAC_REALLOC and DRFLAC_FREE. |
1215 | |
1216 | Sometimes a FLAC file won't keep track of the total sample count. In this situation the function will continuously |
1217 | read samples into a dynamically sized buffer on the heap until no samples are left. |
1218 | |
1219 | Do not call this function on a broadcast type of stream (like internet radio streams and whatnot). |
1220 | */ |
1221 | 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); |
1222 | |
1223 | /* Same as drflac_open_and_read_pcm_frames_s32(), except returns signed 16-bit integer samples. */ |
1224 | 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); |
1225 | |
1226 | /* Same as drflac_open_and_read_pcm_frames_s32(), except returns 32-bit floating-point samples. */ |
1227 | 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); |
1228 | |
9e052883 |
1229 | #ifndef DR_FLAC_NO_STDIO |
1230 | /* Same as drflac_open_and_read_pcm_frames_s32() except opens the decoder from a file. */ |
1231 | DRFLAC_API drflac_int32* drflac_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalPCMFrameCount, const drflac_allocation_callbacks* pAllocationCallbacks); |
1232 | |
1233 | /* Same as drflac_open_file_and_read_pcm_frames_s32(), except returns signed 16-bit integer samples. */ |
1234 | DRFLAC_API drflac_int16* drflac_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalPCMFrameCount, const drflac_allocation_callbacks* pAllocationCallbacks); |
1235 | |
1236 | /* Same as drflac_open_file_and_read_pcm_frames_s32(), except returns 32-bit floating-point samples. */ |
1237 | DRFLAC_API float* drflac_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalPCMFrameCount, const drflac_allocation_callbacks* pAllocationCallbacks); |
1238 | #endif |
1239 | |
2ff0b512 |
1240 | /* Same as drflac_open_and_read_pcm_frames_s32() except opens the decoder from a block of memory. */ |
1241 | 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); |
1242 | |
1243 | /* Same as drflac_open_memory_and_read_pcm_frames_s32(), except returns signed 16-bit integer samples. */ |
1244 | 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); |
1245 | |
1246 | /* Same as drflac_open_memory_and_read_pcm_frames_s32(), except returns 32-bit floating-point samples. */ |
1247 | 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); |
1248 | |
1249 | /* |
1250 | Frees memory that was allocated internally by dr_flac. |
1251 | |
1252 | 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. |
1253 | */ |
1254 | DRFLAC_API void drflac_free(void* p, const drflac_allocation_callbacks* pAllocationCallbacks); |
1255 | |
1256 | |
1257 | /* Structure representing an iterator for vorbis comments in a VORBIS_COMMENT metadata block. */ |
1258 | typedef struct |
1259 | { |
1260 | drflac_uint32 countRemaining; |
1261 | const char* pRunningData; |
1262 | } drflac_vorbis_comment_iterator; |
1263 | |
1264 | /* |
1265 | Initializes a vorbis comment iterator. This can be used for iterating over the vorbis comments in a VORBIS_COMMENT |
1266 | metadata block. |
1267 | */ |
1268 | DRFLAC_API void drflac_init_vorbis_comment_iterator(drflac_vorbis_comment_iterator* pIter, drflac_uint32 commentCount, const void* pComments); |
1269 | |
1270 | /* |
1271 | Goes to the next vorbis comment in the given iterator. If null is returned it means there are no more comments. The |
1272 | returned string is NOT null terminated. |
1273 | */ |
1274 | DRFLAC_API const char* drflac_next_vorbis_comment(drflac_vorbis_comment_iterator* pIter, drflac_uint32* pCommentLengthOut); |
1275 | |
1276 | |
1277 | /* Structure representing an iterator for cuesheet tracks in a CUESHEET metadata block. */ |
1278 | typedef struct |
1279 | { |
1280 | drflac_uint32 countRemaining; |
1281 | const char* pRunningData; |
1282 | } drflac_cuesheet_track_iterator; |
1283 | |
9e052883 |
1284 | /* The order of members here is important because we map this directly to the raw data within the CUESHEET metadata block. */ |
2ff0b512 |
1285 | typedef struct |
1286 | { |
1287 | drflac_uint64 offset; |
1288 | drflac_uint8 index; |
1289 | drflac_uint8 reserved[3]; |
1290 | } drflac_cuesheet_track_index; |
2ff0b512 |
1291 | |
1292 | typedef struct |
1293 | { |
1294 | drflac_uint64 offset; |
1295 | drflac_uint8 trackNumber; |
1296 | char ISRC[12]; |
1297 | drflac_bool8 isAudio; |
1298 | drflac_bool8 preEmphasis; |
1299 | drflac_uint8 indexCount; |
1300 | const drflac_cuesheet_track_index* pIndexPoints; |
1301 | } drflac_cuesheet_track; |
1302 | |
1303 | /* |
1304 | Initializes a cuesheet track iterator. This can be used for iterating over the cuesheet tracks in a CUESHEET metadata |
1305 | block. |
1306 | */ |
1307 | DRFLAC_API void drflac_init_cuesheet_track_iterator(drflac_cuesheet_track_iterator* pIter, drflac_uint32 trackCount, const void* pTrackData); |
1308 | |
1309 | /* Goes to the next cuesheet track in the given iterator. If DRFLAC_FALSE is returned it means there are no more comments. */ |
1310 | DRFLAC_API drflac_bool32 drflac_next_cuesheet_track(drflac_cuesheet_track_iterator* pIter, drflac_cuesheet_track* pCuesheetTrack); |
1311 | |
1312 | |
1313 | #ifdef __cplusplus |
1314 | } |
1315 | #endif |
1316 | #endif /* dr_flac_h */ |
1317 | |
1318 | |
1319 | /************************************************************************************************************************************************************ |
1320 | ************************************************************************************************************************************************************ |
1321 | |
1322 | IMPLEMENTATION |
1323 | |
1324 | ************************************************************************************************************************************************************ |
1325 | ************************************************************************************************************************************************************/ |
1326 | #if defined(DR_FLAC_IMPLEMENTATION) || defined(DRFLAC_IMPLEMENTATION) |
1327 | #ifndef dr_flac_c |
1328 | #define dr_flac_c |
1329 | |
1330 | /* Disable some annoying warnings. */ |
1331 | #if defined(__clang__) || (defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6))) |
1332 | #pragma GCC diagnostic push |
1333 | #if __GNUC__ >= 7 |
1334 | #pragma GCC diagnostic ignored "-Wimplicit-fallthrough" |
1335 | #endif |
1336 | #endif |
1337 | |
1338 | #ifdef __linux__ |
1339 | #ifndef _BSD_SOURCE |
1340 | #define _BSD_SOURCE |
1341 | #endif |
1342 | #ifndef _DEFAULT_SOURCE |
1343 | #define _DEFAULT_SOURCE |
1344 | #endif |
1345 | #ifndef __USE_BSD |
1346 | #define __USE_BSD |
1347 | #endif |
1348 | #include <endian.h> |
1349 | #endif |
1350 | |
1351 | #include <stdlib.h> |
1352 | #include <string.h> |
1353 | |
1354 | #ifdef _MSC_VER |
1355 | #define DRFLAC_INLINE __forceinline |
1356 | #elif defined(__GNUC__) |
1357 | /* |
1358 | I've had a bug report where GCC is emitting warnings about functions possibly not being inlineable. This warning happens when |
1359 | the __attribute__((always_inline)) attribute is defined without an "inline" statement. I think therefore there must be some |
1360 | case where "__inline__" is not always defined, thus the compiler emitting these warnings. When using -std=c89 or -ansi on the |
1361 | command line, we cannot use the "inline" keyword and instead need to use "__inline__". In an attempt to work around this issue |
1362 | I am using "__inline__" only when we're compiling in strict ANSI mode. |
1363 | */ |
1364 | #if defined(__STRICT_ANSI__) |
9e052883 |
1365 | #define DRFLAC_GNUC_INLINE_HINT __inline__ |
1366 | #else |
1367 | #define DRFLAC_GNUC_INLINE_HINT inline |
1368 | #endif |
1369 | |
1370 | #if (__GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 2)) || defined(__clang__) |
1371 | #define DRFLAC_INLINE DRFLAC_GNUC_INLINE_HINT __attribute__((always_inline)) |
2ff0b512 |
1372 | #else |
9e052883 |
1373 | #define DRFLAC_INLINE DRFLAC_GNUC_INLINE_HINT |
2ff0b512 |
1374 | #endif |
1375 | #elif defined(__WATCOMC__) |
1376 | #define DRFLAC_INLINE __inline |
1377 | #else |
1378 | #define DRFLAC_INLINE |
1379 | #endif |
1380 | |
1381 | /* CPU architecture. */ |
1382 | #if defined(__x86_64__) || defined(_M_X64) |
1383 | #define DRFLAC_X64 |
1384 | #elif defined(__i386) || defined(_M_IX86) |
1385 | #define DRFLAC_X86 |
9e052883 |
1386 | #elif defined(__arm__) || defined(_M_ARM) || defined(__arm64) || defined(__arm64__) || defined(__aarch64__) || defined(_M_ARM64) |
2ff0b512 |
1387 | #define DRFLAC_ARM |
1388 | #endif |
1389 | |
1390 | /* |
1391 | Intrinsics Support |
1392 | |
1393 | 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 |
1394 | |
1395 | "error: shift must be an immediate" |
1396 | |
1397 | Unfortuantely dr_flac depends on this for a few things so we're just going to disable SSE on GCC 4.2 and below. |
1398 | */ |
1399 | #if !defined(DR_FLAC_NO_SIMD) |
1400 | #if defined(DRFLAC_X64) || defined(DRFLAC_X86) |
1401 | #if defined(_MSC_VER) && !defined(__clang__) |
1402 | /* MSVC. */ |
1403 | #if _MSC_VER >= 1400 && !defined(DRFLAC_NO_SSE2) /* 2005 */ |
1404 | #define DRFLAC_SUPPORT_SSE2 |
1405 | #endif |
1406 | #if _MSC_VER >= 1600 && !defined(DRFLAC_NO_SSE41) /* 2010 */ |
1407 | #define DRFLAC_SUPPORT_SSE41 |
1408 | #endif |
1409 | #elif defined(__clang__) || (defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3))) |
1410 | /* Assume GNUC-style. */ |
1411 | #if defined(__SSE2__) && !defined(DRFLAC_NO_SSE2) |
1412 | #define DRFLAC_SUPPORT_SSE2 |
1413 | #endif |
1414 | #if defined(__SSE4_1__) && !defined(DRFLAC_NO_SSE41) |
1415 | #define DRFLAC_SUPPORT_SSE41 |
1416 | #endif |
1417 | #endif |
1418 | |
1419 | /* If at this point we still haven't determined compiler support for the intrinsics just fall back to __has_include. */ |
1420 | #if !defined(__GNUC__) && !defined(__clang__) && defined(__has_include) |
1421 | #if !defined(DRFLAC_SUPPORT_SSE2) && !defined(DRFLAC_NO_SSE2) && __has_include(<emmintrin.h>) |
1422 | #define DRFLAC_SUPPORT_SSE2 |
1423 | #endif |
1424 | #if !defined(DRFLAC_SUPPORT_SSE41) && !defined(DRFLAC_NO_SSE41) && __has_include(<smmintrin.h>) |
1425 | #define DRFLAC_SUPPORT_SSE41 |
1426 | #endif |
1427 | #endif |
1428 | |
1429 | #if defined(DRFLAC_SUPPORT_SSE41) |
1430 | #include <smmintrin.h> |
1431 | #elif defined(DRFLAC_SUPPORT_SSE2) |
1432 | #include <emmintrin.h> |
1433 | #endif |
1434 | #endif |
1435 | |
1436 | #if defined(DRFLAC_ARM) |
1437 | #if !defined(DRFLAC_NO_NEON) && (defined(__ARM_NEON) || defined(__aarch64__) || defined(_M_ARM64)) |
1438 | #define DRFLAC_SUPPORT_NEON |
2ff0b512 |
1439 | #include <arm_neon.h> |
1440 | #endif |
1441 | #endif |
1442 | #endif |
1443 | |
1444 | /* Compile-time CPU feature support. */ |
1445 | #if !defined(DR_FLAC_NO_SIMD) && (defined(DRFLAC_X86) || defined(DRFLAC_X64)) |
1446 | #if defined(_MSC_VER) && !defined(__clang__) |
1447 | #if _MSC_VER >= 1400 |
1448 | #include <intrin.h> |
1449 | static void drflac__cpuid(int info[4], int fid) |
1450 | { |
1451 | __cpuid(info, fid); |
1452 | } |
1453 | #else |
1454 | #define DRFLAC_NO_CPUID |
1455 | #endif |
1456 | #else |
1457 | #if defined(__GNUC__) || defined(__clang__) |
1458 | static void drflac__cpuid(int info[4], int fid) |
1459 | { |
1460 | /* |
1461 | 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 |
1462 | 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 |
1463 | supporting different assembly dialects. |
1464 | |
1465 | What's basically happening is that we're saving and restoring the ebx register manually. |
1466 | */ |
1467 | #if defined(DRFLAC_X86) && defined(__PIC__) |
1468 | __asm__ __volatile__ ( |
1469 | "xchg{l} {%%}ebx, %k1;" |
1470 | "cpuid;" |
1471 | "xchg{l} {%%}ebx, %k1;" |
1472 | : "=a"(info[0]), "=&r"(info[1]), "=c"(info[2]), "=d"(info[3]) : "a"(fid), "c"(0) |
1473 | ); |
1474 | #else |
1475 | __asm__ __volatile__ ( |
1476 | "cpuid" : "=a"(info[0]), "=b"(info[1]), "=c"(info[2]), "=d"(info[3]) : "a"(fid), "c"(0) |
1477 | ); |
1478 | #endif |
1479 | } |
1480 | #else |
1481 | #define DRFLAC_NO_CPUID |
1482 | #endif |
1483 | #endif |
1484 | #else |
1485 | #define DRFLAC_NO_CPUID |
1486 | #endif |
1487 | |
1488 | static DRFLAC_INLINE drflac_bool32 drflac_has_sse2(void) |
1489 | { |
1490 | #if defined(DRFLAC_SUPPORT_SSE2) |
1491 | #if (defined(DRFLAC_X64) || defined(DRFLAC_X86)) && !defined(DRFLAC_NO_SSE2) |
1492 | #if defined(DRFLAC_X64) |
1493 | return DRFLAC_TRUE; /* 64-bit targets always support SSE2. */ |
1494 | #elif (defined(_M_IX86_FP) && _M_IX86_FP == 2) || defined(__SSE2__) |
1495 | return DRFLAC_TRUE; /* If the compiler is allowed to freely generate SSE2 code we can assume support. */ |
1496 | #else |
1497 | #if defined(DRFLAC_NO_CPUID) |
1498 | return DRFLAC_FALSE; |
1499 | #else |
1500 | int info[4]; |
1501 | drflac__cpuid(info, 1); |
1502 | return (info[3] & (1 << 26)) != 0; |
1503 | #endif |
1504 | #endif |
1505 | #else |
1506 | return DRFLAC_FALSE; /* SSE2 is only supported on x86 and x64 architectures. */ |
1507 | #endif |
1508 | #else |
1509 | return DRFLAC_FALSE; /* No compiler support. */ |
1510 | #endif |
1511 | } |
1512 | |
1513 | static DRFLAC_INLINE drflac_bool32 drflac_has_sse41(void) |
1514 | { |
1515 | #if defined(DRFLAC_SUPPORT_SSE41) |
1516 | #if (defined(DRFLAC_X64) || defined(DRFLAC_X86)) && !defined(DRFLAC_NO_SSE41) |
9e052883 |
1517 | #if defined(__SSE4_1__) || defined(__AVX__) |
2ff0b512 |
1518 | return DRFLAC_TRUE; /* If the compiler is allowed to freely generate SSE41 code we can assume support. */ |
1519 | #else |
1520 | #if defined(DRFLAC_NO_CPUID) |
1521 | return DRFLAC_FALSE; |
1522 | #else |
1523 | int info[4]; |
1524 | drflac__cpuid(info, 1); |
1525 | return (info[2] & (1 << 19)) != 0; |
1526 | #endif |
1527 | #endif |
1528 | #else |
1529 | return DRFLAC_FALSE; /* SSE41 is only supported on x86 and x64 architectures. */ |
1530 | #endif |
1531 | #else |
1532 | return DRFLAC_FALSE; /* No compiler support. */ |
1533 | #endif |
1534 | } |
1535 | |
1536 | |
1537 | #if defined(_MSC_VER) && _MSC_VER >= 1500 && (defined(DRFLAC_X86) || defined(DRFLAC_X64)) && !defined(__clang__) |
1538 | #define DRFLAC_HAS_LZCNT_INTRINSIC |
1539 | #elif (defined(__GNUC__) && ((__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 7))) |
1540 | #define DRFLAC_HAS_LZCNT_INTRINSIC |
1541 | #elif defined(__clang__) |
1542 | #if defined(__has_builtin) |
1543 | #if __has_builtin(__builtin_clzll) || __has_builtin(__builtin_clzl) |
1544 | #define DRFLAC_HAS_LZCNT_INTRINSIC |
1545 | #endif |
1546 | #endif |
1547 | #endif |
1548 | |
1549 | #if defined(_MSC_VER) && _MSC_VER >= 1400 && !defined(__clang__) |
1550 | #define DRFLAC_HAS_BYTESWAP16_INTRINSIC |
1551 | #define DRFLAC_HAS_BYTESWAP32_INTRINSIC |
1552 | #define DRFLAC_HAS_BYTESWAP64_INTRINSIC |
1553 | #elif defined(__clang__) |
1554 | #if defined(__has_builtin) |
1555 | #if __has_builtin(__builtin_bswap16) |
1556 | #define DRFLAC_HAS_BYTESWAP16_INTRINSIC |
1557 | #endif |
1558 | #if __has_builtin(__builtin_bswap32) |
1559 | #define DRFLAC_HAS_BYTESWAP32_INTRINSIC |
1560 | #endif |
1561 | #if __has_builtin(__builtin_bswap64) |
1562 | #define DRFLAC_HAS_BYTESWAP64_INTRINSIC |
1563 | #endif |
1564 | #endif |
1565 | #elif defined(__GNUC__) |
1566 | #if ((__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)) |
1567 | #define DRFLAC_HAS_BYTESWAP32_INTRINSIC |
1568 | #define DRFLAC_HAS_BYTESWAP64_INTRINSIC |
1569 | #endif |
1570 | #if ((__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8)) |
1571 | #define DRFLAC_HAS_BYTESWAP16_INTRINSIC |
1572 | #endif |
9e052883 |
1573 | #elif defined(__WATCOMC__) && defined(__386__) |
1574 | #define DRFLAC_HAS_BYTESWAP16_INTRINSIC |
1575 | #define DRFLAC_HAS_BYTESWAP32_INTRINSIC |
1576 | #define DRFLAC_HAS_BYTESWAP64_INTRINSIC |
1577 | extern __inline drflac_uint16 _watcom_bswap16(drflac_uint16); |
1578 | extern __inline drflac_uint32 _watcom_bswap32(drflac_uint32); |
1579 | extern __inline drflac_uint64 _watcom_bswap64(drflac_uint64); |
1580 | #pragma aux _watcom_bswap16 = \ |
1581 | "xchg al, ah" \ |
1582 | parm [ax] \ |
1583 | value [ax] \ |
1584 | modify nomemory; |
1585 | #pragma aux _watcom_bswap32 = \ |
1586 | "bswap eax" \ |
1587 | parm [eax] \ |
1588 | value [eax] \ |
1589 | modify nomemory; |
1590 | #pragma aux _watcom_bswap64 = \ |
1591 | "bswap eax" \ |
1592 | "bswap edx" \ |
1593 | "xchg eax,edx" \ |
1594 | parm [eax edx] \ |
1595 | value [eax edx] \ |
1596 | modify nomemory; |
2ff0b512 |
1597 | #endif |
1598 | |
1599 | |
1600 | /* Standard library stuff. */ |
1601 | #ifndef DRFLAC_ASSERT |
1602 | #include <assert.h> |
1603 | #define DRFLAC_ASSERT(expression) assert(expression) |
1604 | #endif |
1605 | #ifndef DRFLAC_MALLOC |
1606 | #define DRFLAC_MALLOC(sz) malloc((sz)) |
1607 | #endif |
1608 | #ifndef DRFLAC_REALLOC |
1609 | #define DRFLAC_REALLOC(p, sz) realloc((p), (sz)) |
1610 | #endif |
1611 | #ifndef DRFLAC_FREE |
1612 | #define DRFLAC_FREE(p) free((p)) |
1613 | #endif |
1614 | #ifndef DRFLAC_COPY_MEMORY |
1615 | #define DRFLAC_COPY_MEMORY(dst, src, sz) memcpy((dst), (src), (sz)) |
1616 | #endif |
1617 | #ifndef DRFLAC_ZERO_MEMORY |
1618 | #define DRFLAC_ZERO_MEMORY(p, sz) memset((p), 0, (sz)) |
1619 | #endif |
1620 | #ifndef DRFLAC_ZERO_OBJECT |
1621 | #define DRFLAC_ZERO_OBJECT(p) DRFLAC_ZERO_MEMORY((p), sizeof(*(p))) |
1622 | #endif |
1623 | |
1624 | #define DRFLAC_MAX_SIMD_VECTOR_SIZE 64 /* 64 for AVX-512 in the future. */ |
1625 | |
1626 | typedef drflac_int32 drflac_result; |
1627 | #define DRFLAC_SUCCESS 0 |
1628 | #define DRFLAC_ERROR -1 /* A generic error. */ |
1629 | #define DRFLAC_INVALID_ARGS -2 |
1630 | #define DRFLAC_INVALID_OPERATION -3 |
1631 | #define DRFLAC_OUT_OF_MEMORY -4 |
1632 | #define DRFLAC_OUT_OF_RANGE -5 |
1633 | #define DRFLAC_ACCESS_DENIED -6 |
1634 | #define DRFLAC_DOES_NOT_EXIST -7 |
1635 | #define DRFLAC_ALREADY_EXISTS -8 |
1636 | #define DRFLAC_TOO_MANY_OPEN_FILES -9 |
1637 | #define DRFLAC_INVALID_FILE -10 |
1638 | #define DRFLAC_TOO_BIG -11 |
1639 | #define DRFLAC_PATH_TOO_LONG -12 |
1640 | #define DRFLAC_NAME_TOO_LONG -13 |
1641 | #define DRFLAC_NOT_DIRECTORY -14 |
1642 | #define DRFLAC_IS_DIRECTORY -15 |
1643 | #define DRFLAC_DIRECTORY_NOT_EMPTY -16 |
1644 | #define DRFLAC_END_OF_FILE -17 |
1645 | #define DRFLAC_NO_SPACE -18 |
1646 | #define DRFLAC_BUSY -19 |
1647 | #define DRFLAC_IO_ERROR -20 |
1648 | #define DRFLAC_INTERRUPT -21 |
1649 | #define DRFLAC_UNAVAILABLE -22 |
1650 | #define DRFLAC_ALREADY_IN_USE -23 |
1651 | #define DRFLAC_BAD_ADDRESS -24 |
1652 | #define DRFLAC_BAD_SEEK -25 |
1653 | #define DRFLAC_BAD_PIPE -26 |
1654 | #define DRFLAC_DEADLOCK -27 |
1655 | #define DRFLAC_TOO_MANY_LINKS -28 |
1656 | #define DRFLAC_NOT_IMPLEMENTED -29 |
1657 | #define DRFLAC_NO_MESSAGE -30 |
1658 | #define DRFLAC_BAD_MESSAGE -31 |
1659 | #define DRFLAC_NO_DATA_AVAILABLE -32 |
1660 | #define DRFLAC_INVALID_DATA -33 |
1661 | #define DRFLAC_TIMEOUT -34 |
1662 | #define DRFLAC_NO_NETWORK -35 |
1663 | #define DRFLAC_NOT_UNIQUE -36 |
1664 | #define DRFLAC_NOT_SOCKET -37 |
1665 | #define DRFLAC_NO_ADDRESS -38 |
1666 | #define DRFLAC_BAD_PROTOCOL -39 |
1667 | #define DRFLAC_PROTOCOL_UNAVAILABLE -40 |
1668 | #define DRFLAC_PROTOCOL_NOT_SUPPORTED -41 |
1669 | #define DRFLAC_PROTOCOL_FAMILY_NOT_SUPPORTED -42 |
1670 | #define DRFLAC_ADDRESS_FAMILY_NOT_SUPPORTED -43 |
1671 | #define DRFLAC_SOCKET_NOT_SUPPORTED -44 |
1672 | #define DRFLAC_CONNECTION_RESET -45 |
1673 | #define DRFLAC_ALREADY_CONNECTED -46 |
1674 | #define DRFLAC_NOT_CONNECTED -47 |
1675 | #define DRFLAC_CONNECTION_REFUSED -48 |
1676 | #define DRFLAC_NO_HOST -49 |
1677 | #define DRFLAC_IN_PROGRESS -50 |
1678 | #define DRFLAC_CANCELLED -51 |
1679 | #define DRFLAC_MEMORY_ALREADY_MAPPED -52 |
1680 | #define DRFLAC_AT_END -53 |
1681 | #define DRFLAC_CRC_MISMATCH -128 |
1682 | |
1683 | #define DRFLAC_SUBFRAME_CONSTANT 0 |
1684 | #define DRFLAC_SUBFRAME_VERBATIM 1 |
1685 | #define DRFLAC_SUBFRAME_FIXED 8 |
1686 | #define DRFLAC_SUBFRAME_LPC 32 |
1687 | #define DRFLAC_SUBFRAME_RESERVED 255 |
1688 | |
1689 | #define DRFLAC_RESIDUAL_CODING_METHOD_PARTITIONED_RICE 0 |
1690 | #define DRFLAC_RESIDUAL_CODING_METHOD_PARTITIONED_RICE2 1 |
1691 | |
1692 | #define DRFLAC_CHANNEL_ASSIGNMENT_INDEPENDENT 0 |
1693 | #define DRFLAC_CHANNEL_ASSIGNMENT_LEFT_SIDE 8 |
1694 | #define DRFLAC_CHANNEL_ASSIGNMENT_RIGHT_SIDE 9 |
1695 | #define DRFLAC_CHANNEL_ASSIGNMENT_MID_SIDE 10 |
1696 | |
9e052883 |
1697 | #define DRFLAC_SEEKPOINT_SIZE_IN_BYTES 18 |
1698 | #define DRFLAC_CUESHEET_TRACK_SIZE_IN_BYTES 36 |
1699 | #define DRFLAC_CUESHEET_TRACK_INDEX_SIZE_IN_BYTES 12 |
1700 | |
2ff0b512 |
1701 | #define drflac_align(x, a) ((((x) + (a) - 1) / (a)) * (a)) |
1702 | |
1703 | |
1704 | DRFLAC_API void drflac_version(drflac_uint32* pMajor, drflac_uint32* pMinor, drflac_uint32* pRevision) |
1705 | { |
1706 | if (pMajor) { |
1707 | *pMajor = DRFLAC_VERSION_MAJOR; |
1708 | } |
1709 | |
1710 | if (pMinor) { |
1711 | *pMinor = DRFLAC_VERSION_MINOR; |
1712 | } |
1713 | |
1714 | if (pRevision) { |
1715 | *pRevision = DRFLAC_VERSION_REVISION; |
1716 | } |
1717 | } |
1718 | |
1719 | DRFLAC_API const char* drflac_version_string(void) |
1720 | { |
1721 | return DRFLAC_VERSION_STRING; |
1722 | } |
1723 | |
1724 | |
1725 | /* CPU caps. */ |
1726 | #if defined(__has_feature) |
1727 | #if __has_feature(thread_sanitizer) |
1728 | #define DRFLAC_NO_THREAD_SANITIZE __attribute__((no_sanitize("thread"))) |
1729 | #else |
1730 | #define DRFLAC_NO_THREAD_SANITIZE |
1731 | #endif |
1732 | #else |
1733 | #define DRFLAC_NO_THREAD_SANITIZE |
1734 | #endif |
1735 | |
1736 | #if defined(DRFLAC_HAS_LZCNT_INTRINSIC) |
1737 | static drflac_bool32 drflac__gIsLZCNTSupported = DRFLAC_FALSE; |
1738 | #endif |
1739 | |
1740 | #ifndef DRFLAC_NO_CPUID |
1741 | static drflac_bool32 drflac__gIsSSE2Supported = DRFLAC_FALSE; |
1742 | static drflac_bool32 drflac__gIsSSE41Supported = DRFLAC_FALSE; |
1743 | |
1744 | /* |
1745 | I've had a bug report that Clang's ThreadSanitizer presents a warning in this function. Having reviewed this, this does |
1746 | actually make sense. However, since CPU caps should never differ for a running process, I don't think the trade off of |
1747 | complicating internal API's by passing around CPU caps versus just disabling the warnings is worthwhile. I'm therefore |
1748 | just going to disable these warnings. This is disabled via the DRFLAC_NO_THREAD_SANITIZE attribute. |
1749 | */ |
1750 | DRFLAC_NO_THREAD_SANITIZE static void drflac__init_cpu_caps(void) |
1751 | { |
1752 | static drflac_bool32 isCPUCapsInitialized = DRFLAC_FALSE; |
1753 | |
1754 | if (!isCPUCapsInitialized) { |
1755 | /* LZCNT */ |
1756 | #if defined(DRFLAC_HAS_LZCNT_INTRINSIC) |
1757 | int info[4] = {0}; |
1758 | drflac__cpuid(info, 0x80000001); |
1759 | drflac__gIsLZCNTSupported = (info[2] & (1 << 5)) != 0; |
1760 | #endif |
1761 | |
1762 | /* SSE2 */ |
1763 | drflac__gIsSSE2Supported = drflac_has_sse2(); |
1764 | |
1765 | /* SSE4.1 */ |
1766 | drflac__gIsSSE41Supported = drflac_has_sse41(); |
1767 | |
1768 | /* Initialized. */ |
1769 | isCPUCapsInitialized = DRFLAC_TRUE; |
1770 | } |
1771 | } |
1772 | #else |
1773 | static drflac_bool32 drflac__gIsNEONSupported = DRFLAC_FALSE; |
1774 | |
1775 | static DRFLAC_INLINE drflac_bool32 drflac__has_neon(void) |
1776 | { |
1777 | #if defined(DRFLAC_SUPPORT_NEON) |
1778 | #if defined(DRFLAC_ARM) && !defined(DRFLAC_NO_NEON) |
1779 | #if (defined(__ARM_NEON) || defined(__aarch64__) || defined(_M_ARM64)) |
1780 | return DRFLAC_TRUE; /* If the compiler is allowed to freely generate NEON code we can assume support. */ |
1781 | #else |
1782 | /* TODO: Runtime check. */ |
1783 | return DRFLAC_FALSE; |
1784 | #endif |
1785 | #else |
1786 | return DRFLAC_FALSE; /* NEON is only supported on ARM architectures. */ |
1787 | #endif |
1788 | #else |
1789 | return DRFLAC_FALSE; /* No compiler support. */ |
1790 | #endif |
1791 | } |
1792 | |
1793 | DRFLAC_NO_THREAD_SANITIZE static void drflac__init_cpu_caps(void) |
1794 | { |
1795 | drflac__gIsNEONSupported = drflac__has_neon(); |
1796 | |
1797 | #if defined(DRFLAC_HAS_LZCNT_INTRINSIC) && defined(DRFLAC_ARM) && (defined(__ARM_ARCH) && __ARM_ARCH >= 5) |
1798 | drflac__gIsLZCNTSupported = DRFLAC_TRUE; |
1799 | #endif |
1800 | } |
1801 | #endif |
1802 | |
1803 | |
1804 | /* Endian Management */ |
1805 | static DRFLAC_INLINE drflac_bool32 drflac__is_little_endian(void) |
1806 | { |
1807 | #if defined(DRFLAC_X86) || defined(DRFLAC_X64) |
1808 | return DRFLAC_TRUE; |
1809 | #elif defined(__BYTE_ORDER) && defined(__LITTLE_ENDIAN) && __BYTE_ORDER == __LITTLE_ENDIAN |
1810 | return DRFLAC_TRUE; |
1811 | #else |
1812 | int n = 1; |
1813 | return (*(char*)&n) == 1; |
1814 | #endif |
1815 | } |
1816 | |
1817 | static DRFLAC_INLINE drflac_uint16 drflac__swap_endian_uint16(drflac_uint16 n) |
1818 | { |
1819 | #ifdef DRFLAC_HAS_BYTESWAP16_INTRINSIC |
1820 | #if defined(_MSC_VER) && !defined(__clang__) |
1821 | return _byteswap_ushort(n); |
1822 | #elif defined(__GNUC__) || defined(__clang__) |
1823 | return __builtin_bswap16(n); |
9e052883 |
1824 | #elif defined(__WATCOMC__) && defined(__386__) |
1825 | return _watcom_bswap16(n); |
2ff0b512 |
1826 | #else |
1827 | #error "This compiler does not support the byte swap intrinsic." |
1828 | #endif |
1829 | #else |
1830 | return ((n & 0xFF00) >> 8) | |
1831 | ((n & 0x00FF) << 8); |
1832 | #endif |
1833 | } |
1834 | |
1835 | static DRFLAC_INLINE drflac_uint32 drflac__swap_endian_uint32(drflac_uint32 n) |
1836 | { |
1837 | #ifdef DRFLAC_HAS_BYTESWAP32_INTRINSIC |
1838 | #if defined(_MSC_VER) && !defined(__clang__) |
1839 | return _byteswap_ulong(n); |
1840 | #elif defined(__GNUC__) || defined(__clang__) |
1841 | #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. */ |
1842 | /* Inline assembly optimized implementation for ARM. In my testing, GCC does not generate optimized code with __builtin_bswap32(). */ |
1843 | drflac_uint32 r; |
1844 | __asm__ __volatile__ ( |
1845 | #if defined(DRFLAC_64BIT) |
1846 | "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! */ |
1847 | #else |
1848 | "rev %[out], %[in]" : [out]"=r"(r) : [in]"r"(n) |
1849 | #endif |
1850 | ); |
1851 | return r; |
1852 | #else |
1853 | return __builtin_bswap32(n); |
1854 | #endif |
9e052883 |
1855 | #elif defined(__WATCOMC__) && defined(__386__) |
1856 | return _watcom_bswap32(n); |
2ff0b512 |
1857 | #else |
1858 | #error "This compiler does not support the byte swap intrinsic." |
1859 | #endif |
1860 | #else |
1861 | return ((n & 0xFF000000) >> 24) | |
1862 | ((n & 0x00FF0000) >> 8) | |
1863 | ((n & 0x0000FF00) << 8) | |
1864 | ((n & 0x000000FF) << 24); |
1865 | #endif |
1866 | } |
1867 | |
1868 | static DRFLAC_INLINE drflac_uint64 drflac__swap_endian_uint64(drflac_uint64 n) |
1869 | { |
1870 | #ifdef DRFLAC_HAS_BYTESWAP64_INTRINSIC |
1871 | #if defined(_MSC_VER) && !defined(__clang__) |
1872 | return _byteswap_uint64(n); |
1873 | #elif defined(__GNUC__) || defined(__clang__) |
1874 | return __builtin_bswap64(n); |
9e052883 |
1875 | #elif defined(__WATCOMC__) && defined(__386__) |
1876 | return _watcom_bswap64(n); |
2ff0b512 |
1877 | #else |
1878 | #error "This compiler does not support the byte swap intrinsic." |
1879 | #endif |
1880 | #else |
1881 | /* Weird "<< 32" bitshift is required for C89 because it doesn't support 64-bit constants. Should be optimized out by a good compiler. */ |
1882 | return ((n & ((drflac_uint64)0xFF000000 << 32)) >> 56) | |
1883 | ((n & ((drflac_uint64)0x00FF0000 << 32)) >> 40) | |
1884 | ((n & ((drflac_uint64)0x0000FF00 << 32)) >> 24) | |
1885 | ((n & ((drflac_uint64)0x000000FF << 32)) >> 8) | |
1886 | ((n & ((drflac_uint64)0xFF000000 )) << 8) | |
1887 | ((n & ((drflac_uint64)0x00FF0000 )) << 24) | |
1888 | ((n & ((drflac_uint64)0x0000FF00 )) << 40) | |
1889 | ((n & ((drflac_uint64)0x000000FF )) << 56); |
1890 | #endif |
1891 | } |
1892 | |
1893 | |
1894 | static DRFLAC_INLINE drflac_uint16 drflac__be2host_16(drflac_uint16 n) |
1895 | { |
1896 | if (drflac__is_little_endian()) { |
1897 | return drflac__swap_endian_uint16(n); |
1898 | } |
1899 | |
1900 | return n; |
1901 | } |
1902 | |
1903 | static DRFLAC_INLINE drflac_uint32 drflac__be2host_32(drflac_uint32 n) |
1904 | { |
1905 | if (drflac__is_little_endian()) { |
1906 | return drflac__swap_endian_uint32(n); |
1907 | } |
1908 | |
1909 | return n; |
1910 | } |
1911 | |
9e052883 |
1912 | static DRFLAC_INLINE drflac_uint32 drflac__be2host_32_ptr_unaligned(const void* pData) |
1913 | { |
1914 | const drflac_uint8* pNum = (drflac_uint8*)pData; |
1915 | return *(pNum) << 24 | *(pNum+1) << 16 | *(pNum+2) << 8 | *(pNum+3); |
1916 | } |
1917 | |
2ff0b512 |
1918 | static DRFLAC_INLINE drflac_uint64 drflac__be2host_64(drflac_uint64 n) |
1919 | { |
1920 | if (drflac__is_little_endian()) { |
1921 | return drflac__swap_endian_uint64(n); |
1922 | } |
1923 | |
1924 | return n; |
1925 | } |
1926 | |
1927 | |
1928 | static DRFLAC_INLINE drflac_uint32 drflac__le2host_32(drflac_uint32 n) |
1929 | { |
1930 | if (!drflac__is_little_endian()) { |
1931 | return drflac__swap_endian_uint32(n); |
1932 | } |
1933 | |
1934 | return n; |
1935 | } |
1936 | |
9e052883 |
1937 | static DRFLAC_INLINE drflac_uint32 drflac__le2host_32_ptr_unaligned(const void* pData) |
1938 | { |
1939 | const drflac_uint8* pNum = (drflac_uint8*)pData; |
1940 | return *pNum | *(pNum+1) << 8 | *(pNum+2) << 16 | *(pNum+3) << 24; |
1941 | } |
1942 | |
2ff0b512 |
1943 | |
1944 | static DRFLAC_INLINE drflac_uint32 drflac__unsynchsafe_32(drflac_uint32 n) |
1945 | { |
1946 | drflac_uint32 result = 0; |
1947 | result |= (n & 0x7F000000) >> 3; |
1948 | result |= (n & 0x007F0000) >> 2; |
1949 | result |= (n & 0x00007F00) >> 1; |
1950 | result |= (n & 0x0000007F) >> 0; |
1951 | |
1952 | return result; |
1953 | } |
1954 | |
1955 | |
1956 | |
1957 | /* The CRC code below is based on this document: http://zlib.net/crc_v3.txt */ |
1958 | static drflac_uint8 drflac__crc8_table[] = { |
1959 | 0x00, 0x07, 0x0E, 0x09, 0x1C, 0x1B, 0x12, 0x15, 0x38, 0x3F, 0x36, 0x31, 0x24, 0x23, 0x2A, 0x2D, |
1960 | 0x70, 0x77, 0x7E, 0x79, 0x6C, 0x6B, 0x62, 0x65, 0x48, 0x4F, 0x46, 0x41, 0x54, 0x53, 0x5A, 0x5D, |
1961 | 0xE0, 0xE7, 0xEE, 0xE9, 0xFC, 0xFB, 0xF2, 0xF5, 0xD8, 0xDF, 0xD6, 0xD1, 0xC4, 0xC3, 0xCA, 0xCD, |
1962 | 0x90, 0x97, 0x9E, 0x99, 0x8C, 0x8B, 0x82, 0x85, 0xA8, 0xAF, 0xA6, 0xA1, 0xB4, 0xB3, 0xBA, 0xBD, |
1963 | 0xC7, 0xC0, 0xC9, 0xCE, 0xDB, 0xDC, 0xD5, 0xD2, 0xFF, 0xF8, 0xF1, 0xF6, 0xE3, 0xE4, 0xED, 0xEA, |
1964 | 0xB7, 0xB0, 0xB9, 0xBE, 0xAB, 0xAC, 0xA5, 0xA2, 0x8F, 0x88, 0x81, 0x86, 0x93, 0x94, 0x9D, 0x9A, |
1965 | 0x27, 0x20, 0x29, 0x2E, 0x3B, 0x3C, 0x35, 0x32, 0x1F, 0x18, 0x11, 0x16, 0x03, 0x04, 0x0D, 0x0A, |
1966 | 0x57, 0x50, 0x59, 0x5E, 0x4B, 0x4C, 0x45, 0x42, 0x6F, 0x68, 0x61, 0x66, 0x73, 0x74, 0x7D, 0x7A, |
1967 | 0x89, 0x8E, 0x87, 0x80, 0x95, 0x92, 0x9B, 0x9C, 0xB1, 0xB6, 0xBF, 0xB8, 0xAD, 0xAA, 0xA3, 0xA4, |
1968 | 0xF9, 0xFE, 0xF7, 0xF0, 0xE5, 0xE2, 0xEB, 0xEC, 0xC1, 0xC6, 0xCF, 0xC8, 0xDD, 0xDA, 0xD3, 0xD4, |
1969 | 0x69, 0x6E, 0x67, 0x60, 0x75, 0x72, 0x7B, 0x7C, 0x51, 0x56, 0x5F, 0x58, 0x4D, 0x4A, 0x43, 0x44, |
1970 | 0x19, 0x1E, 0x17, 0x10, 0x05, 0x02, 0x0B, 0x0C, 0x21, 0x26, 0x2F, 0x28, 0x3D, 0x3A, 0x33, 0x34, |
1971 | 0x4E, 0x49, 0x40, 0x47, 0x52, 0x55, 0x5C, 0x5B, 0x76, 0x71, 0x78, 0x7F, 0x6A, 0x6D, 0x64, 0x63, |
1972 | 0x3E, 0x39, 0x30, 0x37, 0x22, 0x25, 0x2C, 0x2B, 0x06, 0x01, 0x08, 0x0F, 0x1A, 0x1D, 0x14, 0x13, |
1973 | 0xAE, 0xA9, 0xA0, 0xA7, 0xB2, 0xB5, 0xBC, 0xBB, 0x96, 0x91, 0x98, 0x9F, 0x8A, 0x8D, 0x84, 0x83, |
1974 | 0xDE, 0xD9, 0xD0, 0xD7, 0xC2, 0xC5, 0xCC, 0xCB, 0xE6, 0xE1, 0xE8, 0xEF, 0xFA, 0xFD, 0xF4, 0xF3 |
1975 | }; |
1976 | |
1977 | static drflac_uint16 drflac__crc16_table[] = { |
1978 | 0x0000, 0x8005, 0x800F, 0x000A, 0x801B, 0x001E, 0x0014, 0x8011, |
1979 | 0x8033, 0x0036, 0x003C, 0x8039, 0x0028, 0x802D, 0x8027, 0x0022, |
1980 | 0x8063, 0x0066, 0x006C, 0x8069, 0x0078, 0x807D, 0x8077, 0x0072, |
1981 | 0x0050, 0x8055, 0x805F, 0x005A, 0x804B, 0x004E, 0x0044, 0x8041, |
1982 | 0x80C3, 0x00C6, 0x00CC, 0x80C9, 0x00D8, 0x80DD, 0x80D7, 0x00D2, |
1983 | 0x00F0, 0x80F5, 0x80FF, 0x00FA, 0x80EB, 0x00EE, 0x00E4, 0x80E1, |
1984 | 0x00A0, 0x80A5, 0x80AF, 0x00AA, 0x80BB, 0x00BE, 0x00B4, 0x80B1, |
1985 | 0x8093, 0x0096, 0x009C, 0x8099, 0x0088, 0x808D, 0x8087, 0x0082, |
1986 | 0x8183, 0x0186, 0x018C, 0x8189, 0x0198, 0x819D, 0x8197, 0x0192, |
1987 | 0x01B0, 0x81B5, 0x81BF, 0x01BA, 0x81AB, 0x01AE, 0x01A4, 0x81A1, |
1988 | 0x01E0, 0x81E5, 0x81EF, 0x01EA, 0x81FB, 0x01FE, 0x01F4, 0x81F1, |
1989 | 0x81D3, 0x01D6, 0x01DC, 0x81D9, 0x01C8, 0x81CD, 0x81C7, 0x01C2, |
1990 | 0x0140, 0x8145, 0x814F, 0x014A, 0x815B, 0x015E, 0x0154, 0x8151, |
1991 | 0x8173, 0x0176, 0x017C, 0x8179, 0x0168, 0x816D, 0x8167, 0x0162, |
1992 | 0x8123, 0x0126, 0x012C, 0x8129, 0x0138, 0x813D, 0x8137, 0x0132, |
1993 | 0x0110, 0x8115, 0x811F, 0x011A, 0x810B, 0x010E, 0x0104, 0x8101, |
1994 | 0x8303, 0x0306, 0x030C, 0x8309, 0x0318, 0x831D, 0x8317, 0x0312, |
1995 | 0x0330, 0x8335, 0x833F, 0x033A, 0x832B, 0x032E, 0x0324, 0x8321, |
1996 | 0x0360, 0x8365, 0x836F, 0x036A, 0x837B, 0x037E, 0x0374, 0x8371, |
1997 | 0x8353, 0x0356, 0x035C, 0x8359, 0x0348, 0x834D, 0x8347, 0x0342, |
1998 | 0x03C0, 0x83C5, 0x83CF, 0x03CA, 0x83DB, 0x03DE, 0x03D4, 0x83D1, |
1999 | 0x83F3, 0x03F6, 0x03FC, 0x83F9, 0x03E8, 0x83ED, 0x83E7, 0x03E2, |
2000 | 0x83A3, 0x03A6, 0x03AC, 0x83A9, 0x03B8, 0x83BD, 0x83B7, 0x03B2, |
2001 | 0x0390, 0x8395, 0x839F, 0x039A, 0x838B, 0x038E, 0x0384, 0x8381, |
2002 | 0x0280, 0x8285, 0x828F, 0x028A, 0x829B, 0x029E, 0x0294, 0x8291, |
2003 | 0x82B3, 0x02B6, 0x02BC, 0x82B9, 0x02A8, 0x82AD, 0x82A7, 0x02A2, |
2004 | 0x82E3, 0x02E6, 0x02EC, 0x82E9, 0x02F8, 0x82FD, 0x82F7, 0x02F2, |
2005 | 0x02D0, 0x82D5, 0x82DF, 0x02DA, 0x82CB, 0x02CE, 0x02C4, 0x82C1, |
2006 | 0x8243, 0x0246, 0x024C, 0x8249, 0x0258, 0x825D, 0x8257, 0x0252, |
2007 | 0x0270, 0x8275, 0x827F, 0x027A, 0x826B, 0x026E, 0x0264, 0x8261, |
2008 | 0x0220, 0x8225, 0x822F, 0x022A, 0x823B, 0x023E, 0x0234, 0x8231, |
2009 | 0x8213, 0x0216, 0x021C, 0x8219, 0x0208, 0x820D, 0x8207, 0x0202 |
2010 | }; |
2011 | |
2012 | static DRFLAC_INLINE drflac_uint8 drflac_crc8_byte(drflac_uint8 crc, drflac_uint8 data) |
2013 | { |
2014 | return drflac__crc8_table[crc ^ data]; |
2015 | } |
2016 | |
2017 | static DRFLAC_INLINE drflac_uint8 drflac_crc8(drflac_uint8 crc, drflac_uint32 data, drflac_uint32 count) |
2018 | { |
2019 | #ifdef DR_FLAC_NO_CRC |
2020 | (void)crc; |
2021 | (void)data; |
2022 | (void)count; |
2023 | return 0; |
9e052883 |
2024 | #else |
2025 | #if 0 |
2026 | /* REFERENCE (use of this implementation requires an explicit flush by doing "drflac_crc8(crc, 0, 8);") */ |
2027 | drflac_uint8 p = 0x07; |
2028 | for (int i = count-1; i >= 0; --i) { |
2029 | drflac_uint8 bit = (data & (1 << i)) >> i; |
2030 | if (crc & 0x80) { |
2031 | crc = ((crc << 1) | bit) ^ p; |
2032 | } else { |
2033 | crc = ((crc << 1) | bit); |
2034 | } |
2035 | } |
2036 | return crc; |
2ff0b512 |
2037 | #else |
2038 | drflac_uint32 wholeBytes; |
2039 | drflac_uint32 leftoverBits; |
2040 | drflac_uint64 leftoverDataMask; |
2041 | |
2042 | static drflac_uint64 leftoverDataMaskTable[8] = { |
2043 | 0x00, 0x01, 0x03, 0x07, 0x0F, 0x1F, 0x3F, 0x7F |
2044 | }; |
2045 | |
2046 | DRFLAC_ASSERT(count <= 32); |
2047 | |
2048 | wholeBytes = count >> 3; |
2049 | leftoverBits = count - (wholeBytes*8); |
2050 | leftoverDataMask = leftoverDataMaskTable[leftoverBits]; |
2051 | |
2052 | switch (wholeBytes) { |
2053 | case 4: crc = drflac_crc8_byte(crc, (drflac_uint8)((data & (0xFF000000UL << leftoverBits)) >> (24 + leftoverBits))); |
2054 | case 3: crc = drflac_crc8_byte(crc, (drflac_uint8)((data & (0x00FF0000UL << leftoverBits)) >> (16 + leftoverBits))); |
2055 | case 2: crc = drflac_crc8_byte(crc, (drflac_uint8)((data & (0x0000FF00UL << leftoverBits)) >> ( 8 + leftoverBits))); |
2056 | case 1: crc = drflac_crc8_byte(crc, (drflac_uint8)((data & (0x000000FFUL << leftoverBits)) >> ( 0 + leftoverBits))); |
2057 | case 0: if (leftoverBits > 0) crc = (drflac_uint8)((crc << leftoverBits) ^ drflac__crc8_table[(crc >> (8 - leftoverBits)) ^ (data & leftoverDataMask)]); |
2058 | } |
2059 | return crc; |
2060 | #endif |
9e052883 |
2061 | #endif |
2ff0b512 |
2062 | } |
2063 | |
2064 | static DRFLAC_INLINE drflac_uint16 drflac_crc16_byte(drflac_uint16 crc, drflac_uint8 data) |
2065 | { |
2066 | return (crc << 8) ^ drflac__crc16_table[(drflac_uint8)(crc >> 8) ^ data]; |
2067 | } |
2068 | |
2069 | static DRFLAC_INLINE drflac_uint16 drflac_crc16_cache(drflac_uint16 crc, drflac_cache_t data) |
2070 | { |
2071 | #ifdef DRFLAC_64BIT |
2072 | crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 56) & 0xFF)); |
2073 | crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 48) & 0xFF)); |
2074 | crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 40) & 0xFF)); |
2075 | crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 32) & 0xFF)); |
2076 | #endif |
2077 | crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 24) & 0xFF)); |
2078 | crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 16) & 0xFF)); |
2079 | crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 8) & 0xFF)); |
2080 | crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 0) & 0xFF)); |
2081 | |
2082 | return crc; |
2083 | } |
2084 | |
2085 | static DRFLAC_INLINE drflac_uint16 drflac_crc16_bytes(drflac_uint16 crc, drflac_cache_t data, drflac_uint32 byteCount) |
2086 | { |
2087 | switch (byteCount) |
2088 | { |
2089 | #ifdef DRFLAC_64BIT |
2090 | case 8: crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 56) & 0xFF)); |
2091 | case 7: crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 48) & 0xFF)); |
2092 | case 6: crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 40) & 0xFF)); |
2093 | case 5: crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 32) & 0xFF)); |
2094 | #endif |
2095 | case 4: crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 24) & 0xFF)); |
2096 | case 3: crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 16) & 0xFF)); |
2097 | case 2: crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 8) & 0xFF)); |
2098 | case 1: crc = drflac_crc16_byte(crc, (drflac_uint8)((data >> 0) & 0xFF)); |
2099 | } |
2100 | |
2101 | return crc; |
2102 | } |
2103 | |
9e052883 |
2104 | #if 0 |
2105 | static DRFLAC_INLINE drflac_uint16 drflac_crc16__32bit(drflac_uint16 crc, drflac_uint32 data, drflac_uint32 count) |
2106 | { |
2107 | #ifdef DR_FLAC_NO_CRC |
2108 | (void)crc; |
2109 | (void)data; |
2110 | (void)count; |
2111 | return 0; |
2112 | #else |
2113 | #if 0 |
2114 | /* REFERENCE (use of this implementation requires an explicit flush by doing "drflac_crc16(crc, 0, 16);") */ |
2115 | drflac_uint16 p = 0x8005; |
2116 | for (int i = count-1; i >= 0; --i) { |
2117 | drflac_uint16 bit = (data & (1ULL << i)) >> i; |
2118 | if (r & 0x8000) { |
2119 | r = ((r << 1) | bit) ^ p; |
2120 | } else { |
2121 | r = ((r << 1) | bit); |
2122 | } |
2123 | } |
2124 | |
2125 | return crc; |
2126 | #else |
2127 | drflac_uint32 wholeBytes; |
2128 | drflac_uint32 leftoverBits; |
2129 | drflac_uint64 leftoverDataMask; |
2130 | |
2131 | static drflac_uint64 leftoverDataMaskTable[8] = { |
2132 | 0x00, 0x01, 0x03, 0x07, 0x0F, 0x1F, 0x3F, 0x7F |
2133 | }; |
2134 | |
2135 | DRFLAC_ASSERT(count <= 64); |
2136 | |
2137 | wholeBytes = count >> 3; |
2138 | leftoverBits = count & 7; |
2139 | leftoverDataMask = leftoverDataMaskTable[leftoverBits]; |
2140 | |
2141 | switch (wholeBytes) { |
2142 | default: |
2143 | case 4: crc = drflac_crc16_byte(crc, (drflac_uint8)((data & (0xFF000000UL << leftoverBits)) >> (24 + leftoverBits))); |
2144 | case 3: crc = drflac_crc16_byte(crc, (drflac_uint8)((data & (0x00FF0000UL << leftoverBits)) >> (16 + leftoverBits))); |
2145 | case 2: crc = drflac_crc16_byte(crc, (drflac_uint8)((data & (0x0000FF00UL << leftoverBits)) >> ( 8 + leftoverBits))); |
2146 | case 1: crc = drflac_crc16_byte(crc, (drflac_uint8)((data & (0x000000FFUL << leftoverBits)) >> ( 0 + leftoverBits))); |
2147 | case 0: if (leftoverBits > 0) crc = (crc << leftoverBits) ^ drflac__crc16_table[(crc >> (16 - leftoverBits)) ^ (data & leftoverDataMask)]; |
2148 | } |
2149 | return crc; |
2150 | #endif |
2151 | #endif |
2152 | } |
2153 | |
2154 | static DRFLAC_INLINE drflac_uint16 drflac_crc16__64bit(drflac_uint16 crc, drflac_uint64 data, drflac_uint32 count) |
2155 | { |
2156 | #ifdef DR_FLAC_NO_CRC |
2157 | (void)crc; |
2158 | (void)data; |
2159 | (void)count; |
2160 | return 0; |
2161 | #else |
2162 | drflac_uint32 wholeBytes; |
2163 | drflac_uint32 leftoverBits; |
2164 | drflac_uint64 leftoverDataMask; |
2165 | |
2166 | static drflac_uint64 leftoverDataMaskTable[8] = { |
2167 | 0x00, 0x01, 0x03, 0x07, 0x0F, 0x1F, 0x3F, 0x7F |
2168 | }; |
2169 | |
2170 | DRFLAC_ASSERT(count <= 64); |
2171 | |
2172 | wholeBytes = count >> 3; |
2173 | leftoverBits = count & 7; |
2174 | leftoverDataMask = leftoverDataMaskTable[leftoverBits]; |
2175 | |
2176 | switch (wholeBytes) { |
2177 | default: |
2178 | case 8: crc = drflac_crc16_byte(crc, (drflac_uint8)((data & (((drflac_uint64)0xFF000000 << 32) << leftoverBits)) >> (56 + leftoverBits))); /* Weird "<< 32" bitshift is required for C89 because it doesn't support 64-bit constants. Should be optimized out by a good compiler. */ |
2179 | case 7: crc = drflac_crc16_byte(crc, (drflac_uint8)((data & (((drflac_uint64)0x00FF0000 << 32) << leftoverBits)) >> (48 + leftoverBits))); |
2180 | case 6: crc = drflac_crc16_byte(crc, (drflac_uint8)((data & (((drflac_uint64)0x0000FF00 << 32) << leftoverBits)) >> (40 + leftoverBits))); |
2181 | case 5: crc = drflac_crc16_byte(crc, (drflac_uint8)((data & (((drflac_uint64)0x000000FF << 32) << leftoverBits)) >> (32 + leftoverBits))); |
2182 | case 4: crc = drflac_crc16_byte(crc, (drflac_uint8)((data & (((drflac_uint64)0xFF000000 ) << leftoverBits)) >> (24 + leftoverBits))); |
2183 | case 3: crc = drflac_crc16_byte(crc, (drflac_uint8)((data & (((drflac_uint64)0x00FF0000 ) << leftoverBits)) >> (16 + leftoverBits))); |
2184 | case 2: crc = drflac_crc16_byte(crc, (drflac_uint8)((data & (((drflac_uint64)0x0000FF00 ) << leftoverBits)) >> ( 8 + leftoverBits))); |
2185 | case 1: crc = drflac_crc16_byte(crc, (drflac_uint8)((data & (((drflac_uint64)0x000000FF ) << leftoverBits)) >> ( 0 + leftoverBits))); |
2186 | case 0: if (leftoverBits > 0) crc = (crc << leftoverBits) ^ drflac__crc16_table[(crc >> (16 - leftoverBits)) ^ (data & leftoverDataMask)]; |
2187 | } |
2188 | return crc; |
2189 | #endif |
2190 | } |
2191 | |
2192 | |
2193 | static DRFLAC_INLINE drflac_uint16 drflac_crc16(drflac_uint16 crc, drflac_cache_t data, drflac_uint32 count) |
2194 | { |
2195 | #ifdef DRFLAC_64BIT |
2196 | return drflac_crc16__64bit(crc, data, count); |
2197 | #else |
2198 | return drflac_crc16__32bit(crc, data, count); |
2199 | #endif |
2200 | } |
2201 | #endif |
2202 | |
2203 | |
2ff0b512 |
2204 | #ifdef DRFLAC_64BIT |
2205 | #define drflac__be2host__cache_line drflac__be2host_64 |
2206 | #else |
2207 | #define drflac__be2host__cache_line drflac__be2host_32 |
2208 | #endif |
2209 | |
2210 | /* |
2211 | BIT READING ATTEMPT #2 |
2212 | |
2213 | 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 |
2214 | on the most significant bit. It uses the notion of an L1 and L2 cache (borrowed from CPU architecture), where the L1 cache |
2215 | 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 |
2216 | 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 |
2217 | from onRead() is read into. |
2218 | */ |
2219 | #define DRFLAC_CACHE_L1_SIZE_BYTES(bs) (sizeof((bs)->cache)) |
2220 | #define DRFLAC_CACHE_L1_SIZE_BITS(bs) (sizeof((bs)->cache)*8) |
2221 | #define DRFLAC_CACHE_L1_BITS_REMAINING(bs) (DRFLAC_CACHE_L1_SIZE_BITS(bs) - (bs)->consumedBits) |
2222 | #define DRFLAC_CACHE_L1_SELECTION_MASK(_bitCount) (~((~(drflac_cache_t)0) >> (_bitCount))) |
2223 | #define DRFLAC_CACHE_L1_SELECTION_SHIFT(bs, _bitCount) (DRFLAC_CACHE_L1_SIZE_BITS(bs) - (_bitCount)) |
2224 | #define DRFLAC_CACHE_L1_SELECT(bs, _bitCount) (((bs)->cache) & DRFLAC_CACHE_L1_SELECTION_MASK(_bitCount)) |
2225 | #define DRFLAC_CACHE_L1_SELECT_AND_SHIFT(bs, _bitCount) (DRFLAC_CACHE_L1_SELECT((bs), (_bitCount)) >> DRFLAC_CACHE_L1_SELECTION_SHIFT((bs), (_bitCount))) |
2226 | #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))) |
2227 | #define DRFLAC_CACHE_L2_SIZE_BYTES(bs) (sizeof((bs)->cacheL2)) |
2228 | #define DRFLAC_CACHE_L2_LINE_COUNT(bs) (DRFLAC_CACHE_L2_SIZE_BYTES(bs) / sizeof((bs)->cacheL2[0])) |
2229 | #define DRFLAC_CACHE_L2_LINES_REMAINING(bs) (DRFLAC_CACHE_L2_LINE_COUNT(bs) - (bs)->nextL2Line) |
2230 | |
2231 | |
2232 | #ifndef DR_FLAC_NO_CRC |
2233 | static DRFLAC_INLINE void drflac__reset_crc16(drflac_bs* bs) |
2234 | { |
2235 | bs->crc16 = 0; |
2236 | bs->crc16CacheIgnoredBytes = bs->consumedBits >> 3; |
2237 | } |
2238 | |
2239 | static DRFLAC_INLINE void drflac__update_crc16(drflac_bs* bs) |
2240 | { |
2241 | if (bs->crc16CacheIgnoredBytes == 0) { |
2242 | bs->crc16 = drflac_crc16_cache(bs->crc16, bs->crc16Cache); |
2243 | } else { |
2244 | bs->crc16 = drflac_crc16_bytes(bs->crc16, bs->crc16Cache, DRFLAC_CACHE_L1_SIZE_BYTES(bs) - bs->crc16CacheIgnoredBytes); |
2245 | bs->crc16CacheIgnoredBytes = 0; |
2246 | } |
2247 | } |
2248 | |
2249 | static DRFLAC_INLINE drflac_uint16 drflac__flush_crc16(drflac_bs* bs) |
2250 | { |
2251 | /* We should never be flushing in a situation where we are not aligned on a byte boundary. */ |
2252 | DRFLAC_ASSERT((DRFLAC_CACHE_L1_BITS_REMAINING(bs) & 7) == 0); |
2253 | |
2254 | /* |
2255 | The bits that were read from the L1 cache need to be accumulated. The number of bytes needing to be accumulated is determined |
2256 | by the number of bits that have been consumed. |
2257 | */ |
2258 | if (DRFLAC_CACHE_L1_BITS_REMAINING(bs) == 0) { |
2259 | drflac__update_crc16(bs); |
2260 | } else { |
2261 | /* We only accumulate the consumed bits. */ |
2262 | bs->crc16 = drflac_crc16_bytes(bs->crc16, bs->crc16Cache >> DRFLAC_CACHE_L1_BITS_REMAINING(bs), (bs->consumedBits >> 3) - bs->crc16CacheIgnoredBytes); |
2263 | |
2264 | /* |
2265 | The bits that we just accumulated should never be accumulated again. We need to keep track of how many bytes were accumulated |
2266 | so we can handle that later. |
2267 | */ |
2268 | bs->crc16CacheIgnoredBytes = bs->consumedBits >> 3; |
2269 | } |
2270 | |
2271 | return bs->crc16; |
2272 | } |
2273 | #endif |
2274 | |
2275 | static DRFLAC_INLINE drflac_bool32 drflac__reload_l1_cache_from_l2(drflac_bs* bs) |
2276 | { |
2277 | size_t bytesRead; |
2278 | size_t alignedL1LineCount; |
2279 | |
2280 | /* Fast path. Try loading straight from L2. */ |
2281 | if (bs->nextL2Line < DRFLAC_CACHE_L2_LINE_COUNT(bs)) { |
2282 | bs->cache = bs->cacheL2[bs->nextL2Line++]; |
2283 | return DRFLAC_TRUE; |
2284 | } |
2285 | |
2286 | /* |
2287 | 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 |
2288 | any left. |
2289 | */ |
2290 | if (bs->unalignedByteCount > 0) { |
2291 | return DRFLAC_FALSE; /* If we have any unaligned bytes it means there's no more aligned bytes left in the client. */ |
2292 | } |
2293 | |
2294 | bytesRead = bs->onRead(bs->pUserData, bs->cacheL2, DRFLAC_CACHE_L2_SIZE_BYTES(bs)); |
2295 | |
2296 | bs->nextL2Line = 0; |
2297 | if (bytesRead == DRFLAC_CACHE_L2_SIZE_BYTES(bs)) { |
2298 | bs->cache = bs->cacheL2[bs->nextL2Line++]; |
2299 | return DRFLAC_TRUE; |
2300 | } |
2301 | |
2302 | |
2303 | /* |
2304 | If we get here it means we were unable to retrieve enough data to fill the entire L2 cache. It probably |
2305 | means we've just reached the end of the file. We need to move the valid data down to the end of the buffer |
2306 | and adjust the index of the next line accordingly. Also keep in mind that the L2 cache must be aligned to |
2307 | the size of the L1 so we'll need to seek backwards by any misaligned bytes. |
2308 | */ |
2309 | alignedL1LineCount = bytesRead / DRFLAC_CACHE_L1_SIZE_BYTES(bs); |
2310 | |
2311 | /* We need to keep track of any unaligned bytes for later use. */ |
2312 | bs->unalignedByteCount = bytesRead - (alignedL1LineCount * DRFLAC_CACHE_L1_SIZE_BYTES(bs)); |
2313 | if (bs->unalignedByteCount > 0) { |
2314 | bs->unalignedCache = bs->cacheL2[alignedL1LineCount]; |
2315 | } |
2316 | |
2317 | if (alignedL1LineCount > 0) { |
2318 | size_t offset = DRFLAC_CACHE_L2_LINE_COUNT(bs) - alignedL1LineCount; |
2319 | size_t i; |
2320 | for (i = alignedL1LineCount; i > 0; --i) { |
2321 | bs->cacheL2[i-1 + offset] = bs->cacheL2[i-1]; |
2322 | } |
2323 | |
2324 | bs->nextL2Line = (drflac_uint32)offset; |
2325 | bs->cache = bs->cacheL2[bs->nextL2Line++]; |
2326 | return DRFLAC_TRUE; |
2327 | } else { |
2328 | /* If we get into this branch it means we weren't able to load any L1-aligned data. */ |
2329 | bs->nextL2Line = DRFLAC_CACHE_L2_LINE_COUNT(bs); |
2330 | return DRFLAC_FALSE; |
2331 | } |
2332 | } |
2333 | |
2334 | static drflac_bool32 drflac__reload_cache(drflac_bs* bs) |
2335 | { |
2336 | size_t bytesRead; |
2337 | |
2338 | #ifndef DR_FLAC_NO_CRC |
2339 | drflac__update_crc16(bs); |
2340 | #endif |
2341 | |
2342 | /* Fast path. Try just moving the next value in the L2 cache to the L1 cache. */ |
2343 | if (drflac__reload_l1_cache_from_l2(bs)) { |
2344 | bs->cache = drflac__be2host__cache_line(bs->cache); |
2345 | bs->consumedBits = 0; |
2346 | #ifndef DR_FLAC_NO_CRC |
2347 | bs->crc16Cache = bs->cache; |
2348 | #endif |
2349 | return DRFLAC_TRUE; |
2350 | } |
2351 | |
2352 | /* Slow path. */ |
2353 | |
2354 | /* |
2355 | 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 |
2356 | 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 |
2357 | data from the unaligned cache. |
2358 | */ |
2359 | bytesRead = bs->unalignedByteCount; |
2360 | if (bytesRead == 0) { |
2361 | bs->consumedBits = DRFLAC_CACHE_L1_SIZE_BITS(bs); /* <-- The stream has been exhausted, so marked the bits as consumed. */ |
2362 | return DRFLAC_FALSE; |
2363 | } |
2364 | |
2365 | DRFLAC_ASSERT(bytesRead < DRFLAC_CACHE_L1_SIZE_BYTES(bs)); |
2366 | bs->consumedBits = (drflac_uint32)(DRFLAC_CACHE_L1_SIZE_BYTES(bs) - bytesRead) * 8; |
2367 | |
2368 | bs->cache = drflac__be2host__cache_line(bs->unalignedCache); |
2369 | 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. */ |
2370 | bs->unalignedByteCount = 0; /* <-- At this point the unaligned bytes have been moved into the cache and we thus have no more unaligned bytes. */ |
2371 | |
2372 | #ifndef DR_FLAC_NO_CRC |
2373 | bs->crc16Cache = bs->cache >> bs->consumedBits; |
2374 | bs->crc16CacheIgnoredBytes = bs->consumedBits >> 3; |
2375 | #endif |
2376 | return DRFLAC_TRUE; |
2377 | } |
2378 | |
2379 | static void drflac__reset_cache(drflac_bs* bs) |
2380 | { |
2381 | bs->nextL2Line = DRFLAC_CACHE_L2_LINE_COUNT(bs); /* <-- This clears the L2 cache. */ |
2382 | bs->consumedBits = DRFLAC_CACHE_L1_SIZE_BITS(bs); /* <-- This clears the L1 cache. */ |
2383 | bs->cache = 0; |
2384 | bs->unalignedByteCount = 0; /* <-- This clears the trailing unaligned bytes. */ |
2385 | bs->unalignedCache = 0; |
2386 | |
2387 | #ifndef DR_FLAC_NO_CRC |
2388 | bs->crc16Cache = 0; |
2389 | bs->crc16CacheIgnoredBytes = 0; |
2390 | #endif |
2391 | } |
2392 | |
2393 | |
2394 | static DRFLAC_INLINE drflac_bool32 drflac__read_uint32(drflac_bs* bs, unsigned int bitCount, drflac_uint32* pResultOut) |
2395 | { |
2396 | DRFLAC_ASSERT(bs != NULL); |
2397 | DRFLAC_ASSERT(pResultOut != NULL); |
2398 | DRFLAC_ASSERT(bitCount > 0); |
2399 | DRFLAC_ASSERT(bitCount <= 32); |
2400 | |
2401 | if (bs->consumedBits == DRFLAC_CACHE_L1_SIZE_BITS(bs)) { |
2402 | if (!drflac__reload_cache(bs)) { |
2403 | return DRFLAC_FALSE; |
2404 | } |
2405 | } |
2406 | |
2407 | if (bitCount <= DRFLAC_CACHE_L1_BITS_REMAINING(bs)) { |
2408 | /* |
2409 | 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 |
2410 | 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 |
2411 | more optimal solution for this. |
2412 | */ |
2413 | #ifdef DRFLAC_64BIT |
2414 | *pResultOut = (drflac_uint32)DRFLAC_CACHE_L1_SELECT_AND_SHIFT(bs, bitCount); |
2415 | bs->consumedBits += bitCount; |
2416 | bs->cache <<= bitCount; |
2417 | #else |
2418 | if (bitCount < DRFLAC_CACHE_L1_SIZE_BITS(bs)) { |
2419 | *pResultOut = (drflac_uint32)DRFLAC_CACHE_L1_SELECT_AND_SHIFT(bs, bitCount); |
2420 | bs->consumedBits += bitCount; |
2421 | bs->cache <<= bitCount; |
2422 | } else { |
2423 | /* Cannot shift by 32-bits, so need to do it differently. */ |
2424 | *pResultOut = (drflac_uint32)bs->cache; |
2425 | bs->consumedBits = DRFLAC_CACHE_L1_SIZE_BITS(bs); |
2426 | bs->cache = 0; |
2427 | } |
2428 | #endif |
2429 | |
2430 | return DRFLAC_TRUE; |
2431 | } else { |
2432 | /* 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. */ |
2433 | drflac_uint32 bitCountHi = DRFLAC_CACHE_L1_BITS_REMAINING(bs); |
2434 | drflac_uint32 bitCountLo = bitCount - bitCountHi; |
2435 | drflac_uint32 resultHi; |
2436 | |
2437 | DRFLAC_ASSERT(bitCountHi > 0); |
2438 | DRFLAC_ASSERT(bitCountHi < 32); |
2439 | resultHi = (drflac_uint32)DRFLAC_CACHE_L1_SELECT_AND_SHIFT(bs, bitCountHi); |
2440 | |
2441 | if (!drflac__reload_cache(bs)) { |
2442 | return DRFLAC_FALSE; |
2443 | } |
9e052883 |
2444 | if (bitCountLo > DRFLAC_CACHE_L1_BITS_REMAINING(bs)) { |
2445 | /* This happens when we get to end of stream */ |
2446 | return DRFLAC_FALSE; |
2447 | } |
2ff0b512 |
2448 | |
2449 | *pResultOut = (resultHi << bitCountLo) | (drflac_uint32)DRFLAC_CACHE_L1_SELECT_AND_SHIFT(bs, bitCountLo); |
2450 | bs->consumedBits += bitCountLo; |
2451 | bs->cache <<= bitCountLo; |
2452 | return DRFLAC_TRUE; |
2453 | } |
2454 | } |
2455 | |
2456 | static drflac_bool32 drflac__read_int32(drflac_bs* bs, unsigned int bitCount, drflac_int32* pResult) |
2457 | { |
2458 | drflac_uint32 result; |
2459 | |
2460 | DRFLAC_ASSERT(bs != NULL); |
2461 | DRFLAC_ASSERT(pResult != NULL); |
2462 | DRFLAC_ASSERT(bitCount > 0); |
2463 | DRFLAC_ASSERT(bitCount <= 32); |
2464 | |
2465 | if (!drflac__read_uint32(bs, bitCount, &result)) { |
2466 | return DRFLAC_FALSE; |
2467 | } |
2468 | |
2469 | /* Do not attempt to shift by 32 as it's undefined. */ |
2470 | if (bitCount < 32) { |
2471 | drflac_uint32 signbit; |
2472 | signbit = ((result >> (bitCount-1)) & 0x01); |
2473 | result |= (~signbit + 1) << bitCount; |
2474 | } |
2475 | |
2476 | *pResult = (drflac_int32)result; |
2477 | return DRFLAC_TRUE; |
2478 | } |
2479 | |
2480 | #ifdef DRFLAC_64BIT |
2481 | static drflac_bool32 drflac__read_uint64(drflac_bs* bs, unsigned int bitCount, drflac_uint64* pResultOut) |
2482 | { |
2483 | drflac_uint32 resultHi; |
2484 | drflac_uint32 resultLo; |
2485 | |
2486 | DRFLAC_ASSERT(bitCount <= 64); |
2487 | DRFLAC_ASSERT(bitCount > 32); |
2488 | |
2489 | if (!drflac__read_uint32(bs, bitCount - 32, &resultHi)) { |
2490 | return DRFLAC_FALSE; |
2491 | } |
2492 | |
2493 | if (!drflac__read_uint32(bs, 32, &resultLo)) { |
2494 | return DRFLAC_FALSE; |
2495 | } |
2496 | |
2497 | *pResultOut = (((drflac_uint64)resultHi) << 32) | ((drflac_uint64)resultLo); |
2498 | return DRFLAC_TRUE; |
2499 | } |
2500 | #endif |
2501 | |
9e052883 |
2502 | /* Function below is unused, but leaving it here in case I need to quickly add it again. */ |
2503 | #if 0 |
2504 | static drflac_bool32 drflac__read_int64(drflac_bs* bs, unsigned int bitCount, drflac_int64* pResultOut) |
2505 | { |
2506 | drflac_uint64 result; |
2507 | drflac_uint64 signbit; |
2508 | |
2509 | DRFLAC_ASSERT(bitCount <= 64); |
2510 | |
2511 | if (!drflac__read_uint64(bs, bitCount, &result)) { |
2512 | return DRFLAC_FALSE; |
2513 | } |
2514 | |
2515 | signbit = ((result >> (bitCount-1)) & 0x01); |
2516 | result |= (~signbit + 1) << bitCount; |
2517 | |
2518 | *pResultOut = (drflac_int64)result; |
2519 | return DRFLAC_TRUE; |
2520 | } |
2521 | #endif |
2522 | |
2ff0b512 |
2523 | static drflac_bool32 drflac__read_uint16(drflac_bs* bs, unsigned int bitCount, drflac_uint16* pResult) |
2524 | { |
2525 | drflac_uint32 result; |
2526 | |
2527 | DRFLAC_ASSERT(bs != NULL); |
2528 | DRFLAC_ASSERT(pResult != NULL); |
2529 | DRFLAC_ASSERT(bitCount > 0); |
2530 | DRFLAC_ASSERT(bitCount <= 16); |
2531 | |
2532 | if (!drflac__read_uint32(bs, bitCount, &result)) { |
2533 | return DRFLAC_FALSE; |
2534 | } |
2535 | |
2536 | *pResult = (drflac_uint16)result; |
2537 | return DRFLAC_TRUE; |
2538 | } |
2539 | |
9e052883 |
2540 | #if 0 |
2541 | static drflac_bool32 drflac__read_int16(drflac_bs* bs, unsigned int bitCount, drflac_int16* pResult) |
2542 | { |
2543 | drflac_int32 result; |
2544 | |
2545 | DRFLAC_ASSERT(bs != NULL); |
2546 | DRFLAC_ASSERT(pResult != NULL); |
2547 | DRFLAC_ASSERT(bitCount > 0); |
2548 | DRFLAC_ASSERT(bitCount <= 16); |
2549 | |
2550 | if (!drflac__read_int32(bs, bitCount, &result)) { |
2551 | return DRFLAC_FALSE; |
2552 | } |
2553 | |
2554 | *pResult = (drflac_int16)result; |
2555 | return DRFLAC_TRUE; |
2556 | } |
2557 | #endif |
2558 | |
2ff0b512 |
2559 | static drflac_bool32 drflac__read_uint8(drflac_bs* bs, unsigned int bitCount, drflac_uint8* pResult) |
2560 | { |
2561 | drflac_uint32 result; |
2562 | |
2563 | DRFLAC_ASSERT(bs != NULL); |
2564 | DRFLAC_ASSERT(pResult != NULL); |
2565 | DRFLAC_ASSERT(bitCount > 0); |
2566 | DRFLAC_ASSERT(bitCount <= 8); |
2567 | |
2568 | if (!drflac__read_uint32(bs, bitCount, &result)) { |
2569 | return DRFLAC_FALSE; |
2570 | } |
2571 | |
2572 | *pResult = (drflac_uint8)result; |
2573 | return DRFLAC_TRUE; |
2574 | } |
2575 | |
2576 | static drflac_bool32 drflac__read_int8(drflac_bs* bs, unsigned int bitCount, drflac_int8* pResult) |
2577 | { |
2578 | drflac_int32 result; |
2579 | |
2580 | DRFLAC_ASSERT(bs != NULL); |
2581 | DRFLAC_ASSERT(pResult != NULL); |
2582 | DRFLAC_ASSERT(bitCount > 0); |
2583 | DRFLAC_ASSERT(bitCount <= 8); |
2584 | |
2585 | if (!drflac__read_int32(bs, bitCount, &result)) { |
2586 | return DRFLAC_FALSE; |
2587 | } |
2588 | |
2589 | *pResult = (drflac_int8)result; |
2590 | return DRFLAC_TRUE; |
2591 | } |
2592 | |
2593 | |
2594 | static drflac_bool32 drflac__seek_bits(drflac_bs* bs, size_t bitsToSeek) |
2595 | { |
2596 | if (bitsToSeek <= DRFLAC_CACHE_L1_BITS_REMAINING(bs)) { |
2597 | bs->consumedBits += (drflac_uint32)bitsToSeek; |
2598 | bs->cache <<= bitsToSeek; |
2599 | return DRFLAC_TRUE; |
2600 | } else { |
2601 | /* It straddles the cached data. This function isn't called too frequently so I'm favouring simplicity here. */ |
2602 | bitsToSeek -= DRFLAC_CACHE_L1_BITS_REMAINING(bs); |
2603 | bs->consumedBits += DRFLAC_CACHE_L1_BITS_REMAINING(bs); |
2604 | bs->cache = 0; |
2605 | |
2606 | /* Simple case. Seek in groups of the same number as bits that fit within a cache line. */ |
2607 | #ifdef DRFLAC_64BIT |
2608 | while (bitsToSeek >= DRFLAC_CACHE_L1_SIZE_BITS(bs)) { |
2609 | drflac_uint64 bin; |
2610 | if (!drflac__read_uint64(bs, DRFLAC_CACHE_L1_SIZE_BITS(bs), &bin)) { |
2611 | return DRFLAC_FALSE; |
2612 | } |
2613 | bitsToSeek -= DRFLAC_CACHE_L1_SIZE_BITS(bs); |
2614 | } |
2615 | #else |
2616 | while (bitsToSeek >= DRFLAC_CACHE_L1_SIZE_BITS(bs)) { |
2617 | drflac_uint32 bin; |
2618 | if (!drflac__read_uint32(bs, DRFLAC_CACHE_L1_SIZE_BITS(bs), &bin)) { |
2619 | return DRFLAC_FALSE; |
2620 | } |
2621 | bitsToSeek -= DRFLAC_CACHE_L1_SIZE_BITS(bs); |
2622 | } |
2623 | #endif |
2624 | |
2625 | /* Whole leftover bytes. */ |
2626 | while (bitsToSeek >= 8) { |
2627 | drflac_uint8 bin; |
2628 | if (!drflac__read_uint8(bs, 8, &bin)) { |
2629 | return DRFLAC_FALSE; |
2630 | } |
2631 | bitsToSeek -= 8; |
2632 | } |
2633 | |
2634 | /* Leftover bits. */ |
2635 | if (bitsToSeek > 0) { |
2636 | drflac_uint8 bin; |
2637 | if (!drflac__read_uint8(bs, (drflac_uint32)bitsToSeek, &bin)) { |
2638 | return DRFLAC_FALSE; |
2639 | } |
2640 | bitsToSeek = 0; /* <-- Necessary for the assert below. */ |
2641 | } |
2642 | |
2643 | DRFLAC_ASSERT(bitsToSeek == 0); |
2644 | return DRFLAC_TRUE; |
2645 | } |
2646 | } |
2647 | |
2648 | |
2649 | /* 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. */ |
2650 | static drflac_bool32 drflac__find_and_seek_to_next_sync_code(drflac_bs* bs) |
2651 | { |
2652 | DRFLAC_ASSERT(bs != NULL); |
2653 | |
2654 | /* |
2655 | 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 |
2656 | thing to do is align to the next byte. |
2657 | */ |
2658 | if (!drflac__seek_bits(bs, DRFLAC_CACHE_L1_BITS_REMAINING(bs) & 7)) { |
2659 | return DRFLAC_FALSE; |
2660 | } |
2661 | |
2662 | for (;;) { |
2663 | drflac_uint8 hi; |
2664 | |
2665 | #ifndef DR_FLAC_NO_CRC |
2666 | drflac__reset_crc16(bs); |
2667 | #endif |
2668 | |
2669 | if (!drflac__read_uint8(bs, 8, &hi)) { |
2670 | return DRFLAC_FALSE; |
2671 | } |
2672 | |
2673 | if (hi == 0xFF) { |
2674 | drflac_uint8 lo; |
2675 | if (!drflac__read_uint8(bs, 6, &lo)) { |
2676 | return DRFLAC_FALSE; |
2677 | } |
2678 | |
2679 | if (lo == 0x3E) { |
2680 | return DRFLAC_TRUE; |
2681 | } else { |
2682 | if (!drflac__seek_bits(bs, DRFLAC_CACHE_L1_BITS_REMAINING(bs) & 7)) { |
2683 | return DRFLAC_FALSE; |
2684 | } |
2685 | } |
2686 | } |
2687 | } |
2688 | |
2689 | /* Should never get here. */ |
2690 | /*return DRFLAC_FALSE;*/ |
2691 | } |
2692 | |
2693 | |
2694 | #if defined(DRFLAC_HAS_LZCNT_INTRINSIC) |
2695 | #define DRFLAC_IMPLEMENT_CLZ_LZCNT |
2696 | #endif |
2697 | #if defined(_MSC_VER) && _MSC_VER >= 1400 && (defined(DRFLAC_X64) || defined(DRFLAC_X86)) && !defined(__clang__) |
2698 | #define DRFLAC_IMPLEMENT_CLZ_MSVC |
2699 | #endif |
9e052883 |
2700 | #if defined(__WATCOMC__) && defined(__386__) |
2701 | #define DRFLAC_IMPLEMENT_CLZ_WATCOM |
2702 | #endif |
2703 | #ifdef __MRC__ |
2704 | #include <intrinsics.h> |
2705 | #define DRFLAC_IMPLEMENT_CLZ_MRC |
2706 | #endif |
2ff0b512 |
2707 | |
2708 | static DRFLAC_INLINE drflac_uint32 drflac__clz_software(drflac_cache_t x) |
2709 | { |
2710 | drflac_uint32 n; |
2711 | static drflac_uint32 clz_table_4[] = { |
2712 | 0, |
2713 | 4, |
2714 | 3, 3, |
2715 | 2, 2, 2, 2, |
2716 | 1, 1, 1, 1, 1, 1, 1, 1 |
2717 | }; |
2718 | |
2719 | if (x == 0) { |
2720 | return sizeof(x)*8; |
2721 | } |
2722 | |
2723 | n = clz_table_4[x >> (sizeof(x)*8 - 4)]; |
2724 | if (n == 0) { |
2725 | #ifdef DRFLAC_64BIT |
2726 | if ((x & ((drflac_uint64)0xFFFFFFFF << 32)) == 0) { n = 32; x <<= 32; } |
2727 | if ((x & ((drflac_uint64)0xFFFF0000 << 32)) == 0) { n += 16; x <<= 16; } |
2728 | if ((x & ((drflac_uint64)0xFF000000 << 32)) == 0) { n += 8; x <<= 8; } |
2729 | if ((x & ((drflac_uint64)0xF0000000 << 32)) == 0) { n += 4; x <<= 4; } |
2730 | #else |
2731 | if ((x & 0xFFFF0000) == 0) { n = 16; x <<= 16; } |
2732 | if ((x & 0xFF000000) == 0) { n += 8; x <<= 8; } |
2733 | if ((x & 0xF0000000) == 0) { n += 4; x <<= 4; } |
2734 | #endif |
2735 | n += clz_table_4[x >> (sizeof(x)*8 - 4)]; |
2736 | } |
2737 | |
2738 | return n - 1; |
2739 | } |
2740 | |
2741 | #ifdef DRFLAC_IMPLEMENT_CLZ_LZCNT |
2742 | static DRFLAC_INLINE drflac_bool32 drflac__is_lzcnt_supported(void) |
2743 | { |
2744 | /* Fast compile time check for ARM. */ |
2745 | #if defined(DRFLAC_HAS_LZCNT_INTRINSIC) && defined(DRFLAC_ARM) && (defined(__ARM_ARCH) && __ARM_ARCH >= 5) |
2746 | return DRFLAC_TRUE; |
9e052883 |
2747 | #elif defined(__MRC__) |
2748 | return DRFLAC_TRUE; |
2ff0b512 |
2749 | #else |
2750 | /* If the compiler itself does not support the intrinsic then we'll need to return false. */ |
2751 | #ifdef DRFLAC_HAS_LZCNT_INTRINSIC |
2752 | return drflac__gIsLZCNTSupported; |
2753 | #else |
2754 | return DRFLAC_FALSE; |
2755 | #endif |
2756 | #endif |
2757 | } |
2758 | |
2759 | static DRFLAC_INLINE drflac_uint32 drflac__clz_lzcnt(drflac_cache_t x) |
2760 | { |
2761 | /* |
2762 | It's critical for competitive decoding performance that this function be highly optimal. With MSVC we can use the __lzcnt64() and __lzcnt() intrinsics |
2763 | to achieve good performance, however on GCC and Clang it's a little bit more annoying. The __builtin_clzl() and __builtin_clzll() intrinsics leave |
2764 | 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 |
2765 | 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 |
2766 | 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 |
2767 | 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 |
2768 | 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 |
2769 | getting clobbered? |
2770 | |
2771 | 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 |
2772 | assembly rules for `clang-cl`. If somebody can identify an error in dr_flac's inlined assembly I'm happy to get that fixed. |
2773 | |
2774 | Fortunately there is an easy workaround for this. Clang implements MSVC-specific intrinsics for compatibility. It also defines _MSC_VER for extra |
2775 | 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 |
2776 | to know how to fix the inlined assembly for correctness sake, however. |
2777 | */ |
2778 | |
2779 | #if defined(_MSC_VER) /*&& !defined(__clang__)*/ /* <-- Intentionally wanting Clang to use the MSVC __lzcnt64/__lzcnt intrinsics due to above ^. */ |
2780 | #ifdef DRFLAC_64BIT |
2781 | return (drflac_uint32)__lzcnt64(x); |
2782 | #else |
2783 | return (drflac_uint32)__lzcnt(x); |
2784 | #endif |
2785 | #else |
2786 | #if defined(__GNUC__) || defined(__clang__) |
2787 | #if defined(DRFLAC_X64) |
2788 | { |
2789 | drflac_uint64 r; |
2790 | __asm__ __volatile__ ( |
2791 | "lzcnt{ %1, %0| %0, %1}" : "=r"(r) : "r"(x) : "cc" |
2792 | ); |
2793 | |
2794 | return (drflac_uint32)r; |
2795 | } |
2796 | #elif defined(DRFLAC_X86) |
2797 | { |
2798 | drflac_uint32 r; |
2799 | __asm__ __volatile__ ( |
2800 | "lzcnt{l %1, %0| %0, %1}" : "=r"(r) : "r"(x) : "cc" |
2801 | ); |
2802 | |
2803 | return r; |
2804 | } |
2805 | #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. */ |
2806 | { |
2807 | unsigned int r; |
2808 | __asm__ __volatile__ ( |
2809 | #if defined(DRFLAC_64BIT) |
2810 | "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! */ |
2811 | #else |
2812 | "clz %[out], %[in]" : [out]"=r"(r) : [in]"r"(x) |
2813 | #endif |
2814 | ); |
2815 | |
2816 | return r; |
2817 | } |
2818 | #else |
2819 | if (x == 0) { |
2820 | return sizeof(x)*8; |
2821 | } |
2822 | #ifdef DRFLAC_64BIT |
2823 | return (drflac_uint32)__builtin_clzll((drflac_uint64)x); |
2824 | #else |
2825 | return (drflac_uint32)__builtin_clzl((drflac_uint32)x); |
2826 | #endif |
2827 | #endif |
2828 | #else |
2829 | /* Unsupported compiler. */ |
2830 | #error "This compiler does not support the lzcnt intrinsic." |
2831 | #endif |
2832 | #endif |
2833 | } |
2834 | #endif |
2835 | |
2836 | #ifdef DRFLAC_IMPLEMENT_CLZ_MSVC |
2837 | #include <intrin.h> /* For BitScanReverse(). */ |
2838 | |
2839 | static DRFLAC_INLINE drflac_uint32 drflac__clz_msvc(drflac_cache_t x) |
2840 | { |
2841 | drflac_uint32 n; |
2842 | |
2843 | if (x == 0) { |
2844 | return sizeof(x)*8; |
2845 | } |
2846 | |
2847 | #ifdef DRFLAC_64BIT |
2848 | _BitScanReverse64((unsigned long*)&n, x); |
2849 | #else |
2850 | _BitScanReverse((unsigned long*)&n, x); |
2851 | #endif |
2852 | return sizeof(x)*8 - n - 1; |
2853 | } |
2854 | #endif |
2855 | |
9e052883 |
2856 | #ifdef DRFLAC_IMPLEMENT_CLZ_WATCOM |
2857 | static __inline drflac_uint32 drflac__clz_watcom (drflac_uint32); |
2858 | #ifdef DRFLAC_IMPLEMENT_CLZ_WATCOM_LZCNT |
2859 | /* Use the LZCNT instruction (only available on some processors since the 2010s). */ |
2860 | #pragma aux drflac__clz_watcom_lzcnt = \ |
2861 | "db 0F3h, 0Fh, 0BDh, 0C0h" /* lzcnt eax, eax */ \ |
2862 | parm [eax] \ |
2863 | value [eax] \ |
2864 | modify nomemory; |
2865 | #else |
2866 | /* Use the 386+-compatible implementation. */ |
2867 | #pragma aux drflac__clz_watcom = \ |
2868 | "bsr eax, eax" \ |
2869 | "xor eax, 31" \ |
2870 | parm [eax] nomemory \ |
2871 | value [eax] \ |
2872 | modify exact [eax] nomemory; |
2873 | #endif |
2874 | #endif |
2875 | |
2ff0b512 |
2876 | static DRFLAC_INLINE drflac_uint32 drflac__clz(drflac_cache_t x) |
2877 | { |
2878 | #ifdef DRFLAC_IMPLEMENT_CLZ_LZCNT |
2879 | if (drflac__is_lzcnt_supported()) { |
2880 | return drflac__clz_lzcnt(x); |
2881 | } else |
2882 | #endif |
2883 | { |
2884 | #ifdef DRFLAC_IMPLEMENT_CLZ_MSVC |
2885 | return drflac__clz_msvc(x); |
9e052883 |
2886 | #elif defined(DRFLAC_IMPLEMENT_CLZ_WATCOM_LZCNT) |
2887 | return drflac__clz_watcom_lzcnt(x); |
2888 | #elif defined(DRFLAC_IMPLEMENT_CLZ_WATCOM) |
2889 | return (x == 0) ? sizeof(x)*8 : drflac__clz_watcom(x); |
2890 | #elif defined(__MRC__) |
2891 | return __cntlzw(x); |
2ff0b512 |
2892 | #else |
2893 | return drflac__clz_software(x); |
2894 | #endif |
2895 | } |
2896 | } |
2897 | |
2898 | |
2899 | static DRFLAC_INLINE drflac_bool32 drflac__seek_past_next_set_bit(drflac_bs* bs, unsigned int* pOffsetOut) |
2900 | { |
2901 | drflac_uint32 zeroCounter = 0; |
2902 | drflac_uint32 setBitOffsetPlus1; |
2903 | |
2904 | while (bs->cache == 0) { |
2905 | zeroCounter += (drflac_uint32)DRFLAC_CACHE_L1_BITS_REMAINING(bs); |
2906 | if (!drflac__reload_cache(bs)) { |
2907 | return DRFLAC_FALSE; |
2908 | } |
2909 | } |
2910 | |
9e052883 |
2911 | if (bs->cache == 1) { |
2912 | /* Not catching this would lead to undefined behaviour: a shift of a 32-bit number by 32 or more is undefined */ |
2913 | *pOffsetOut = zeroCounter + (drflac_uint32)DRFLAC_CACHE_L1_BITS_REMAINING(bs) - 1; |
2914 | if (!drflac__reload_cache(bs)) { |
2915 | return DRFLAC_FALSE; |
2916 | } |
2917 | |
2918 | return DRFLAC_TRUE; |
2919 | } |
2920 | |
2ff0b512 |
2921 | setBitOffsetPlus1 = drflac__clz(bs->cache); |
2922 | setBitOffsetPlus1 += 1; |
2923 | |
9e052883 |
2924 | if (setBitOffsetPlus1 > DRFLAC_CACHE_L1_BITS_REMAINING(bs)) { |
2925 | /* This happens when we get to end of stream */ |
2926 | return DRFLAC_FALSE; |
2927 | } |
2928 | |
2ff0b512 |
2929 | bs->consumedBits += setBitOffsetPlus1; |
2930 | bs->cache <<= setBitOffsetPlus1; |
2931 | |
2932 | *pOffsetOut = zeroCounter + setBitOffsetPlus1 - 1; |
2933 | return DRFLAC_TRUE; |
2934 | } |
2935 | |
2936 | |
2937 | |
2938 | static drflac_bool32 drflac__seek_to_byte(drflac_bs* bs, drflac_uint64 offsetFromStart) |
2939 | { |
2940 | DRFLAC_ASSERT(bs != NULL); |
2941 | DRFLAC_ASSERT(offsetFromStart > 0); |
2942 | |
2943 | /* |
2944 | Seeking from the start is not quite as trivial as it sounds because the onSeek callback takes a signed 32-bit integer (which |
2945 | is intentional because it simplifies the implementation of the onSeek callbacks), however offsetFromStart is unsigned 64-bit. |
2946 | 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. |
2947 | */ |
2948 | if (offsetFromStart > 0x7FFFFFFF) { |
2949 | drflac_uint64 bytesRemaining = offsetFromStart; |
2950 | if (!bs->onSeek(bs->pUserData, 0x7FFFFFFF, drflac_seek_origin_start)) { |
2951 | return DRFLAC_FALSE; |
2952 | } |
2953 | bytesRemaining -= 0x7FFFFFFF; |
2954 | |
2955 | while (bytesRemaining > 0x7FFFFFFF) { |
2956 | if (!bs->onSeek(bs->pUserData, 0x7FFFFFFF, drflac_seek_origin_current)) { |
2957 | return DRFLAC_FALSE; |
2958 | } |
2959 | bytesRemaining -= 0x7FFFFFFF; |
2960 | } |
2961 | |
2962 | if (bytesRemaining > 0) { |
2963 | if (!bs->onSeek(bs->pUserData, (int)bytesRemaining, drflac_seek_origin_current)) { |
2964 | return DRFLAC_FALSE; |
2965 | } |
2966 | } |
2967 | } else { |
2968 | if (!bs->onSeek(bs->pUserData, (int)offsetFromStart, drflac_seek_origin_start)) { |
2969 | return DRFLAC_FALSE; |
2970 | } |
2971 | } |
2972 | |
2973 | /* The cache should be reset to force a reload of fresh data from the client. */ |
2974 | drflac__reset_cache(bs); |
2975 | return DRFLAC_TRUE; |
2976 | } |
2977 | |
2978 | |
2979 | static drflac_result drflac__read_utf8_coded_number(drflac_bs* bs, drflac_uint64* pNumberOut, drflac_uint8* pCRCOut) |
2980 | { |
2981 | drflac_uint8 crc; |
2982 | drflac_uint64 result; |
2983 | drflac_uint8 utf8[7] = {0}; |
2984 | int byteCount; |
2985 | int i; |
2986 | |
2987 | DRFLAC_ASSERT(bs != NULL); |
2988 | DRFLAC_ASSERT(pNumberOut != NULL); |
2989 | DRFLAC_ASSERT(pCRCOut != NULL); |
2990 | |
2991 | crc = *pCRCOut; |
2992 | |
2993 | if (!drflac__read_uint8(bs, 8, utf8)) { |
2994 | *pNumberOut = 0; |
2995 | return DRFLAC_AT_END; |
2996 | } |
2997 | crc = drflac_crc8(crc, utf8[0], 8); |
2998 | |
2999 | if ((utf8[0] & 0x80) == 0) { |
3000 | *pNumberOut = utf8[0]; |
3001 | *pCRCOut = crc; |
3002 | return DRFLAC_SUCCESS; |
3003 | } |
3004 | |
3005 | /*byteCount = 1;*/ |
3006 | if ((utf8[0] & 0xE0) == 0xC0) { |
3007 | byteCount = 2; |
3008 | } else if ((utf8[0] & 0xF0) == 0xE0) { |
3009 | byteCount = 3; |
3010 | } else if ((utf8[0] & 0xF8) == 0xF0) { |
3011 | byteCount = 4; |
3012 | } else if ((utf8[0] & 0xFC) == 0xF8) { |
3013 | byteCount = 5; |
3014 | } else if ((utf8[0] & 0xFE) == 0xFC) { |
3015 | byteCount = 6; |
3016 | } else if ((utf8[0] & 0xFF) == 0xFE) { |
3017 | byteCount = 7; |
3018 | } else { |
3019 | *pNumberOut = 0; |
3020 | return DRFLAC_CRC_MISMATCH; /* Bad UTF-8 encoding. */ |
3021 | } |
3022 | |
3023 | /* Read extra bytes. */ |
3024 | DRFLAC_ASSERT(byteCount > 1); |
3025 | |
3026 | result = (drflac_uint64)(utf8[0] & (0xFF >> (byteCount + 1))); |
3027 | for (i = 1; i < byteCount; ++i) { |
3028 | if (!drflac__read_uint8(bs, 8, utf8 + i)) { |
3029 | *pNumberOut = 0; |
3030 | return DRFLAC_AT_END; |
3031 | } |
3032 | crc = drflac_crc8(crc, utf8[i], 8); |
3033 | |
3034 | result = (result << 6) | (utf8[i] & 0x3F); |
3035 | } |
3036 | |
3037 | *pNumberOut = result; |
3038 | *pCRCOut = crc; |
3039 | return DRFLAC_SUCCESS; |
3040 | } |
3041 | |
3042 | |
9e052883 |
3043 | static DRFLAC_INLINE drflac_uint32 drflac__ilog2_u32(drflac_uint32 x) |
3044 | { |
3045 | #if 1 /* Needs optimizing. */ |
3046 | drflac_uint32 result = 0; |
3047 | while (x > 0) { |
3048 | result += 1; |
3049 | x >>= 1; |
3050 | } |
3051 | |
3052 | return result; |
3053 | #endif |
3054 | } |
3055 | |
3056 | static DRFLAC_INLINE drflac_bool32 drflac__use_64_bit_prediction(drflac_uint32 bitsPerSample, drflac_uint32 order, drflac_uint32 precision) |
3057 | { |
3058 | /* https://web.archive.org/web/20220205005724/https://github.com/ietf-wg-cellar/flac-specification/blob/37a49aa48ba4ba12e8757badfc59c0df35435fec/rfc_backmatter.md */ |
3059 | return bitsPerSample + precision + drflac__ilog2_u32(order) > 32; |
3060 | } |
3061 | |
2ff0b512 |
3062 | |
3063 | /* |
3064 | The next two functions are responsible for calculating the prediction. |
3065 | |
3066 | 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 |
3067 | 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. |
3068 | */ |
9e052883 |
3069 | #if defined(__clang__) |
3070 | __attribute__((no_sanitize("signed-integer-overflow"))) |
3071 | #endif |
2ff0b512 |
3072 | static DRFLAC_INLINE drflac_int32 drflac__calculate_prediction_32(drflac_uint32 order, drflac_int32 shift, const drflac_int32* coefficients, drflac_int32* pDecodedSamples) |
3073 | { |
3074 | drflac_int32 prediction = 0; |
3075 | |
3076 | DRFLAC_ASSERT(order <= 32); |
3077 | |
3078 | /* 32-bit version. */ |
3079 | |
3080 | /* VC++ optimizes this to a single jmp. I've not yet verified this for other compilers. */ |
3081 | switch (order) |
3082 | { |
3083 | case 32: prediction += coefficients[31] * pDecodedSamples[-32]; |
3084 | case 31: prediction += coefficients[30] * pDecodedSamples[-31]; |
3085 | case 30: prediction += coefficients[29] * pDecodedSamples[-30]; |
3086 | case 29: prediction += coefficients[28] * pDecodedSamples[-29]; |
3087 | case 28: prediction += coefficients[27] * pDecodedSamples[-28]; |
3088 | case 27: prediction += coefficients[26] * pDecodedSamples[-27]; |
3089 | case 26: prediction += coefficients[25] * pDecodedSamples[-26]; |
3090 | case 25: prediction += coefficients[24] * pDecodedSamples[-25]; |
3091 | case 24: prediction += coefficients[23] * pDecodedSamples[-24]; |
3092 | case 23: prediction += coefficients[22] * pDecodedSamples[-23]; |
3093 | case 22: prediction += coefficients[21] * pDecodedSamples[-22]; |
3094 | case 21: prediction += coefficients[20] * pDecodedSamples[-21]; |
3095 | case 20: prediction += coefficients[19] * pDecodedSamples[-20]; |
3096 | case 19: prediction += coefficients[18] * pDecodedSamples[-19]; |
3097 | case 18: prediction += coefficients[17] * pDecodedSamples[-18]; |
3098 | case 17: prediction += coefficients[16] * pDecodedSamples[-17]; |
3099 | case 16: prediction += coefficients[15] * pDecodedSamples[-16]; |
3100 | case 15: prediction += coefficients[14] * pDecodedSamples[-15]; |
3101 | case 14: prediction += coefficients[13] * pDecodedSamples[-14]; |
3102 | case 13: prediction += coefficients[12] * pDecodedSamples[-13]; |
3103 | case 12: prediction += coefficients[11] * pDecodedSamples[-12]; |
3104 | case 11: prediction += coefficients[10] * pDecodedSamples[-11]; |
3105 | case 10: prediction += coefficients[ 9] * pDecodedSamples[-10]; |
3106 | case 9: prediction += coefficients[ 8] * pDecodedSamples[- 9]; |
3107 | case 8: prediction += coefficients[ 7] * pDecodedSamples[- 8]; |
3108 | case 7: prediction += coefficients[ 6] * pDecodedSamples[- 7]; |
3109 | case 6: prediction += coefficients[ 5] * pDecodedSamples[- 6]; |
3110 | case 5: prediction += coefficients[ 4] * pDecodedSamples[- 5]; |
3111 | case 4: prediction += coefficients[ 3] * pDecodedSamples[- 4]; |
3112 | case 3: prediction += coefficients[ 2] * pDecodedSamples[- 3]; |
3113 | case 2: prediction += coefficients[ 1] * pDecodedSamples[- 2]; |
3114 | case 1: prediction += coefficients[ 0] * pDecodedSamples[- 1]; |
3115 | } |
3116 | |
3117 | return (drflac_int32)(prediction >> shift); |
3118 | } |
3119 | |
3120 | static DRFLAC_INLINE drflac_int32 drflac__calculate_prediction_64(drflac_uint32 order, drflac_int32 shift, const drflac_int32* coefficients, drflac_int32* pDecodedSamples) |
3121 | { |
3122 | drflac_int64 prediction; |
3123 | |
3124 | DRFLAC_ASSERT(order <= 32); |
3125 | |
3126 | /* 64-bit version. */ |
3127 | |
3128 | /* This method is faster on the 32-bit build when compiling with VC++. See note below. */ |
3129 | #ifndef DRFLAC_64BIT |
3130 | if (order == 8) |
3131 | { |
3132 | prediction = coefficients[0] * (drflac_int64)pDecodedSamples[-1]; |
3133 | prediction += coefficients[1] * (drflac_int64)pDecodedSamples[-2]; |
3134 | prediction += coefficients[2] * (drflac_int64)pDecodedSamples[-3]; |
3135 | prediction += coefficients[3] * (drflac_int64)pDecodedSamples[-4]; |
3136 | prediction += coefficients[4] * (drflac_int64)pDecodedSamples[-5]; |
3137 | prediction += coefficients[5] * (drflac_int64)pDecodedSamples[-6]; |
3138 | prediction += coefficients[6] * (drflac_int64)pDecodedSamples[-7]; |
3139 | prediction += coefficients[7] * (drflac_int64)pDecodedSamples[-8]; |
3140 | } |
3141 | else if (order == 7) |
3142 | { |
3143 | prediction = coefficients[0] * (drflac_int64)pDecodedSamples[-1]; |
3144 | prediction += coefficients[1] * (drflac_int64)pDecodedSamples[-2]; |
3145 | prediction += coefficients[2] * (drflac_int64)pDecodedSamples[-3]; |
3146 | prediction += coefficients[3] * (drflac_int64)pDecodedSamples[-4]; |
3147 | prediction += coefficients[4] * (drflac_int64)pDecodedSamples[-5]; |
3148 | prediction += coefficients[5] * (drflac_int64)pDecodedSamples[-6]; |
3149 | prediction += coefficients[6] * (drflac_int64)pDecodedSamples[-7]; |
3150 | } |
3151 | else if (order == 3) |
3152 | { |
3153 | prediction = coefficients[0] * (drflac_int64)pDecodedSamples[-1]; |
3154 | prediction += coefficients[1] * (drflac_int64)pDecodedSamples[-2]; |
3155 | prediction += coefficients[2] * (drflac_int64)pDecodedSamples[-3]; |
3156 | } |
3157 | else if (order == 6) |
3158 | { |
3159 | prediction = coefficients[0] * (drflac_int64)pDecodedSamples[-1]; |
3160 | prediction += coefficients[1] * (drflac_int64)pDecodedSamples[-2]; |
3161 | prediction += coefficients[2] * (drflac_int64)pDecodedSamples[-3]; |
3162 | prediction += coefficients[3] * (drflac_int64)pDecodedSamples[-4]; |
3163 | prediction += coefficients[4] * (drflac_int64)pDecodedSamples[-5]; |
3164 | prediction += coefficients[5] * (drflac_int64)pDecodedSamples[-6]; |
3165 | } |
3166 | else if (order == 5) |
3167 | { |
3168 | prediction = coefficients[0] * (drflac_int64)pDecodedSamples[-1]; |
3169 | prediction += coefficients[1] * (drflac_int64)pDecodedSamples[-2]; |
3170 | prediction += coefficients[2] * (drflac_int64)pDecodedSamples[-3]; |
3171 | prediction += coefficients[3] * (drflac_int64)pDecodedSamples[-4]; |
3172 | prediction += coefficients[4] * (drflac_int64)pDecodedSamples[-5]; |
3173 | } |
3174 | else if (order == 4) |
3175 | { |
3176 | prediction = coefficients[0] * (drflac_int64)pDecodedSamples[-1]; |
3177 | prediction += coefficients[1] * (drflac_int64)pDecodedSamples[-2]; |
3178 | prediction += coefficients[2] * (drflac_int64)pDecodedSamples[-3]; |
3179 | prediction += coefficients[3] * (drflac_int64)pDecodedSamples[-4]; |
3180 | } |
3181 | else if (order == 12) |
3182 | { |
3183 | prediction = coefficients[0] * (drflac_int64)pDecodedSamples[-1]; |
3184 | prediction += coefficients[1] * (drflac_int64)pDecodedSamples[-2]; |
3185 | prediction += coefficients[2] * (drflac_int64)pDecodedSamples[-3]; |
3186 | prediction += coefficients[3] * (drflac_int64)pDecodedSamples[-4]; |
3187 | prediction += coefficients[4] * (drflac_int64)pDecodedSamples[-5]; |
3188 | prediction += coefficients[5] * (drflac_int64)pDecodedSamples[-6]; |
3189 | prediction += coefficients[6] * (drflac_int64)pDecodedSamples[-7]; |
3190 | prediction += coefficients[7] * (drflac_int64)pDecodedSamples[-8]; |
3191 | prediction += coefficients[8] * (drflac_int64)pDecodedSamples[-9]; |
3192 | prediction += coefficients[9] * (drflac_int64)pDecodedSamples[-10]; |
3193 | prediction += coefficients[10] * (drflac_int64)pDecodedSamples[-11]; |
3194 | prediction += coefficients[11] * (drflac_int64)pDecodedSamples[-12]; |
3195 | } |
3196 | else if (order == 2) |
3197 | { |
3198 | prediction = coefficients[0] * (drflac_int64)pDecodedSamples[-1]; |
3199 | prediction += coefficients[1] * (drflac_int64)pDecodedSamples[-2]; |
3200 | } |
3201 | else if (order == 1) |
3202 | { |
3203 | prediction = coefficients[0] * (drflac_int64)pDecodedSamples[-1]; |
3204 | } |
3205 | else if (order == 10) |
3206 | { |
3207 | prediction = coefficients[0] * (drflac_int64)pDecodedSamples[-1]; |
3208 | prediction += coefficients[1] * (drflac_int64)pDecodedSamples[-2]; |
3209 | prediction += coefficients[2] * (drflac_int64)pDecodedSamples[-3]; |
3210 | prediction += coefficients[3] * (drflac_int64)pDecodedSamples[-4]; |
3211 | prediction += coefficients[4] * (drflac_int64)pDecodedSamples[-5]; |
3212 | prediction += coefficients[5] * (drflac_int64)pDecodedSamples[-6]; |
3213 | prediction += coefficients[6] * (drflac_int64)pDecodedSamples[-7]; |
3214 | prediction += coefficients[7] * (drflac_int64)pDecodedSamples[-8]; |
3215 | prediction += coefficients[8] * (drflac_int64)pDecodedSamples[-9]; |
3216 | prediction += coefficients[9] * (drflac_int64)pDecodedSamples[-10]; |
3217 | } |
3218 | else if (order == 9) |
3219 | { |
3220 | prediction = coefficients[0] * (drflac_int64)pDecodedSamples[-1]; |
3221 | prediction += coefficients[1] * (drflac_int64)pDecodedSamples[-2]; |
3222 | prediction += coefficients[2] * (drflac_int64)pDecodedSamples[-3]; |
3223 | prediction += coefficients[3] * (drflac_int64)pDecodedSamples[-4]; |
3224 | prediction += coefficients[4] * (drflac_int64)pDecodedSamples[-5]; |
3225 | prediction += coefficients[5] * (drflac_int64)pDecodedSamples[-6]; |
3226 | prediction += coefficients[6] * (drflac_int64)pDecodedSamples[-7]; |
3227 | prediction += coefficients[7] * (drflac_int64)pDecodedSamples[-8]; |
3228 | prediction += coefficients[8] * (drflac_int64)pDecodedSamples[-9]; |
3229 | } |
3230 | else if (order == 11) |
3231 | { |
3232 | prediction = coefficients[0] * (drflac_int64)pDecodedSamples[-1]; |
3233 | prediction += coefficients[1] * (drflac_int64)pDecodedSamples[-2]; |
3234 | prediction += coefficients[2] * (drflac_int64)pDecodedSamples[-3]; |
3235 | prediction += coefficients[3] * (drflac_int64)pDecodedSamples[-4]; |
3236 | prediction += coefficients[4] * (drflac_int64)pDecodedSamples[-5]; |
3237 | prediction += coefficients[5] * (drflac_int64)pDecodedSamples[-6]; |
3238 | prediction += coefficients[6] * (drflac_int64)pDecodedSamples[-7]; |
3239 | prediction += coefficients[7] * (drflac_int64)pDecodedSamples[-8]; |
3240 | prediction += coefficients[8] * (drflac_int64)pDecodedSamples[-9]; |
3241 | prediction += coefficients[9] * (drflac_int64)pDecodedSamples[-10]; |
3242 | prediction += coefficients[10] * (drflac_int64)pDecodedSamples[-11]; |
3243 | } |
3244 | else |
3245 | { |
3246 | int j; |
3247 | |
3248 | prediction = 0; |
3249 | for (j = 0; j < (int)order; ++j) { |
3250 | prediction += coefficients[j] * (drflac_int64)pDecodedSamples[-j-1]; |
3251 | } |
3252 | } |
3253 | #endif |
3254 | |
3255 | /* |
3256 | VC++ optimizes this to a single jmp instruction, but only the 64-bit build. The 32-bit build generates less efficient code for some |
3257 | reason. The ugly version above is faster so we'll just switch between the two depending on the target platform. |
3258 | */ |
3259 | #ifdef DRFLAC_64BIT |
3260 | prediction = 0; |
3261 | switch (order) |
3262 | { |
3263 | case 32: prediction += coefficients[31] * (drflac_int64)pDecodedSamples[-32]; |
3264 | case 31: prediction += coefficients[30] * (drflac_int64)pDecodedSamples[-31]; |
3265 | case 30: prediction += coefficients[29] * (drflac_int64)pDecodedSamples[-30]; |
3266 | case 29: prediction += coefficients[28] * (drflac_int64)pDecodedSamples[-29]; |
3267 | case 28: prediction += coefficients[27] * (drflac_int64)pDecodedSamples[-28]; |
3268 | case 27: prediction += coefficients[26] * (drflac_int64)pDecodedSamples[-27]; |
3269 | case 26: prediction += coefficients[25] * (drflac_int64)pDecodedSamples[-26]; |
3270 | case 25: prediction += coefficients[24] * (drflac_int64)pDecodedSamples[-25]; |
3271 | case 24: prediction += coefficients[23] * (drflac_int64)pDecodedSamples[-24]; |
3272 | case 23: prediction += coefficients[22] * (drflac_int64)pDecodedSamples[-23]; |
3273 | case 22: prediction += coefficients[21] * (drflac_int64)pDecodedSamples[-22]; |
3274 | case 21: prediction += coefficients[20] * (drflac_int64)pDecodedSamples[-21]; |
3275 | case 20: prediction += coefficients[19] * (drflac_int64)pDecodedSamples[-20]; |
3276 | case 19: prediction += coefficients[18] * (drflac_int64)pDecodedSamples[-19]; |
3277 | case 18: prediction += coefficients[17] * (drflac_int64)pDecodedSamples[-18]; |
3278 | case 17: prediction += coefficients[16] * (drflac_int64)pDecodedSamples[-17]; |
3279 | case 16: prediction += coefficients[15] * (drflac_int64)pDecodedSamples[-16]; |
3280 | case 15: prediction += coefficients[14] * (drflac_int64)pDecodedSamples[-15]; |
3281 | case 14: prediction += coefficients[13] * (drflac_int64)pDecodedSamples[-14]; |
3282 | case 13: prediction += coefficients[12] * (drflac_int64)pDecodedSamples[-13]; |
3283 | case 12: prediction += coefficients[11] * (drflac_int64)pDecodedSamples[-12]; |
3284 | case 11: prediction += coefficients[10] * (drflac_int64)pDecodedSamples[-11]; |
3285 | case 10: prediction += coefficients[ 9] * (drflac_int64)pDecodedSamples[-10]; |
3286 | case 9: prediction += coefficients[ 8] * (drflac_int64)pDecodedSamples[- 9]; |
3287 | case 8: prediction += coefficients[ 7] * (drflac_int64)pDecodedSamples[- 8]; |
3288 | case 7: prediction += coefficients[ 6] * (drflac_int64)pDecodedSamples[- 7]; |
3289 | case 6: prediction += coefficients[ 5] * (drflac_int64)pDecodedSamples[- 6]; |
3290 | case 5: prediction += coefficients[ 4] * (drflac_int64)pDecodedSamples[- 5]; |
3291 | case 4: prediction += coefficients[ 3] * (drflac_int64)pDecodedSamples[- 4]; |
3292 | case 3: prediction += coefficients[ 2] * (drflac_int64)pDecodedSamples[- 3]; |
3293 | case 2: prediction += coefficients[ 1] * (drflac_int64)pDecodedSamples[- 2]; |
3294 | case 1: prediction += coefficients[ 0] * (drflac_int64)pDecodedSamples[- 1]; |
3295 | } |
3296 | #endif |
3297 | |
3298 | return (drflac_int32)(prediction >> shift); |
3299 | } |
3300 | |
2ff0b512 |
3301 | |
9e052883 |
3302 | #if 0 |
3303 | /* |
3304 | Reference implementation for reading and decoding samples with residual. This is intentionally left unoptimized for the |
3305 | sake of readability and should only be used as a reference. |
3306 | */ |
3307 | static drflac_bool32 drflac__decode_samples_with_residual__rice__reference(drflac_bs* bs, drflac_uint32 bitsPerSample, drflac_uint32 count, drflac_uint8 riceParam, drflac_uint32 lpcOrder, drflac_int32 lpcShift, drflac_uint32 lpcPrecision, const drflac_int32* coefficients, drflac_int32* pSamplesOut) |
3308 | { |
3309 | drflac_uint32 i; |
2ff0b512 |
3310 | |
9e052883 |
3311 | DRFLAC_ASSERT(bs != NULL); |
3312 | DRFLAC_ASSERT(pSamplesOut != NULL); |
2ff0b512 |
3313 | |
9e052883 |
3314 | for (i = 0; i < count; ++i) { |
3315 | drflac_uint32 zeroCounter = 0; |
3316 | for (;;) { |
3317 | drflac_uint8 bit; |
3318 | if (!drflac__read_uint8(bs, 1, &bit)) { |
3319 | return DRFLAC_FALSE; |
3320 | } |
2ff0b512 |
3321 | |
9e052883 |
3322 | if (bit == 0) { |
3323 | zeroCounter += 1; |
3324 | } else { |
3325 | break; |
3326 | } |
3327 | } |
3328 | |
3329 | drflac_uint32 decodedRice; |
3330 | if (riceParam > 0) { |
3331 | if (!drflac__read_uint32(bs, riceParam, &decodedRice)) { |
3332 | return DRFLAC_FALSE; |
3333 | } |
3334 | } else { |
3335 | decodedRice = 0; |
3336 | } |
3337 | |
3338 | decodedRice |= (zeroCounter << riceParam); |
3339 | if ((decodedRice & 0x01)) { |
3340 | decodedRice = ~(decodedRice >> 1); |
3341 | } else { |
3342 | decodedRice = (decodedRice >> 1); |
3343 | } |
3344 | |
3345 | |
3346 | if (drflac__use_64_bit_prediction(bitsPerSample, lpcOrder, lpcPrecision)) { |
3347 | pSamplesOut[i] = decodedRice + drflac__calculate_prediction_64(lpcOrder, lpcShift, coefficients, pSamplesOut + i); |
3348 | } else { |
3349 | pSamplesOut[i] = decodedRice + drflac__calculate_prediction_32(lpcOrder, lpcShift, coefficients, pSamplesOut + i); |
3350 | } |
3351 | } |
3352 | |
3353 | return DRFLAC_TRUE; |
3354 | } |
3355 | #endif |
3356 | |
3357 | #if 0 |
3358 | static drflac_bool32 drflac__read_rice_parts__reference(drflac_bs* bs, drflac_uint8 riceParam, drflac_uint32* pZeroCounterOut, drflac_uint32* pRiceParamPartOut) |
3359 | { |
3360 | drflac_uint32 zeroCounter = 0; |
3361 | drflac_uint32 decodedRice; |
3362 | |
3363 | for (;;) { |
3364 | drflac_uint8 bit; |
3365 | if (!drflac__read_uint8(bs, 1, &bit)) { |
3366 | return DRFLAC_FALSE; |
3367 | } |
3368 | |
3369 | if (bit == 0) { |
3370 | zeroCounter += 1; |
3371 | } else { |
3372 | break; |
3373 | } |
3374 | } |
3375 | |
3376 | if (riceParam > 0) { |
3377 | if (!drflac__read_uint32(bs, riceParam, &decodedRice)) { |
3378 | return DRFLAC_FALSE; |
3379 | } |
3380 | } else { |
3381 | decodedRice = 0; |
3382 | } |
3383 | |
3384 | *pZeroCounterOut = zeroCounter; |
3385 | *pRiceParamPartOut = decodedRice; |
3386 | return DRFLAC_TRUE; |
3387 | } |
3388 | #endif |
3389 | |
3390 | #if 0 |
3391 | static DRFLAC_INLINE drflac_bool32 drflac__read_rice_parts(drflac_bs* bs, drflac_uint8 riceParam, drflac_uint32* pZeroCounterOut, drflac_uint32* pRiceParamPartOut) |
3392 | { |
3393 | drflac_cache_t riceParamMask; |
3394 | drflac_uint32 zeroCounter; |
3395 | drflac_uint32 setBitOffsetPlus1; |
3396 | drflac_uint32 riceParamPart; |
3397 | drflac_uint32 riceLength; |
3398 | |
3399 | DRFLAC_ASSERT(riceParam > 0); /* <-- riceParam should never be 0. drflac__read_rice_parts__param_equals_zero() should be used instead for this case. */ |
3400 | |
3401 | riceParamMask = DRFLAC_CACHE_L1_SELECTION_MASK(riceParam); |
3402 | |
3403 | zeroCounter = 0; |
3404 | while (bs->cache == 0) { |
3405 | zeroCounter += (drflac_uint32)DRFLAC_CACHE_L1_BITS_REMAINING(bs); |
3406 | if (!drflac__reload_cache(bs)) { |
3407 | return DRFLAC_FALSE; |
3408 | } |
3409 | } |
3410 | |
3411 | setBitOffsetPlus1 = drflac__clz(bs->cache); |
3412 | zeroCounter += setBitOffsetPlus1; |
3413 | setBitOffsetPlus1 += 1; |
3414 | |
3415 | riceLength = setBitOffsetPlus1 + riceParam; |
3416 | if (riceLength < DRFLAC_CACHE_L1_BITS_REMAINING(bs)) { |
3417 | riceParamPart = (drflac_uint32)((bs->cache & (riceParamMask >> setBitOffsetPlus1)) >> DRFLAC_CACHE_L1_SELECTION_SHIFT(bs, riceLength)); |
3418 | |
3419 | bs->consumedBits += riceLength; |
3420 | bs->cache <<= riceLength; |
3421 | } else { |
3422 | drflac_uint32 bitCountLo; |
3423 | drflac_cache_t resultHi; |
3424 | |
3425 | bs->consumedBits += riceLength; |
3426 | bs->cache <<= setBitOffsetPlus1 & (DRFLAC_CACHE_L1_SIZE_BITS(bs)-1); /* <-- Equivalent to "if (setBitOffsetPlus1 < DRFLAC_CACHE_L1_SIZE_BITS(bs)) { bs->cache <<= setBitOffsetPlus1; }" */ |
3427 | |
3428 | /* 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. */ |
3429 | bitCountLo = bs->consumedBits - DRFLAC_CACHE_L1_SIZE_BITS(bs); |
3430 | resultHi = DRFLAC_CACHE_L1_SELECT_AND_SHIFT(bs, riceParam); /* <-- Use DRFLAC_CACHE_L1_SELECT_AND_SHIFT_SAFE() if ever this function allows riceParam=0. */ |
3431 | |
3432 | if (bs->nextL2Line < DRFLAC_CACHE_L2_LINE_COUNT(bs)) { |
3433 | #ifndef DR_FLAC_NO_CRC |
3434 | drflac__update_crc16(bs); |
3435 | #endif |
3436 | bs->cache = drflac__be2host__cache_line(bs->cacheL2[bs->nextL2Line++]); |
3437 | bs->consumedBits = 0; |
3438 | #ifndef DR_FLAC_NO_CRC |
3439 | bs->crc16Cache = bs->cache; |
3440 | #endif |
3441 | } else { |
3442 | /* Slow path. We need to fetch more data from the client. */ |
3443 | if (!drflac__reload_cache(bs)) { |
3444 | return DRFLAC_FALSE; |
3445 | } |
3446 | if (bitCountLo > DRFLAC_CACHE_L1_BITS_REMAINING(bs)) { |
3447 | /* This happens when we get to end of stream */ |
3448 | return DRFLAC_FALSE; |
3449 | } |
3450 | } |
3451 | |
3452 | riceParamPart = (drflac_uint32)(resultHi | DRFLAC_CACHE_L1_SELECT_AND_SHIFT_SAFE(bs, bitCountLo)); |
3453 | |
3454 | bs->consumedBits += bitCountLo; |
3455 | bs->cache <<= bitCountLo; |
3456 | } |
3457 | |
3458 | pZeroCounterOut[0] = zeroCounter; |
3459 | pRiceParamPartOut[0] = riceParamPart; |
3460 | |
3461 | return DRFLAC_TRUE; |
3462 | } |
3463 | #endif |
3464 | |
3465 | static DRFLAC_INLINE drflac_bool32 drflac__read_rice_parts_x1(drflac_bs* bs, drflac_uint8 riceParam, drflac_uint32* pZeroCounterOut, drflac_uint32* pRiceParamPartOut) |
3466 | { |
3467 | drflac_uint32 riceParamPlus1 = riceParam + 1; |
3468 | /*drflac_cache_t riceParamPlus1Mask = DRFLAC_CACHE_L1_SELECTION_MASK(riceParamPlus1);*/ |
3469 | drflac_uint32 riceParamPlus1Shift = DRFLAC_CACHE_L1_SELECTION_SHIFT(bs, riceParamPlus1); |
3470 | drflac_uint32 riceParamPlus1MaxConsumedBits = DRFLAC_CACHE_L1_SIZE_BITS(bs) - riceParamPlus1; |
3471 | |
3472 | /* |
3473 | 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 |
3474 | no idea how this will work in practice... |
3475 | */ |
3476 | drflac_cache_t bs_cache = bs->cache; |
3477 | drflac_uint32 bs_consumedBits = bs->consumedBits; |
3478 | |
3479 | /* The first thing to do is find the first unset bit. Most likely a bit will be set in the current cache line. */ |
3480 | drflac_uint32 lzcount = drflac__clz(bs_cache); |
3481 | if (lzcount < sizeof(bs_cache)*8) { |
3482 | pZeroCounterOut[0] = lzcount; |
3483 | |
3484 | /* |
3485 | It is most likely that the riceParam part (which comes after the zero counter) is also on this cache line. When extracting |
3486 | this, we include the set bit from the unary coded part because it simplifies cache management. This bit will be handled |
3487 | outside of this function at a higher level. |
3488 | */ |
3489 | extract_rice_param_part: |
3490 | bs_cache <<= lzcount; |
3491 | bs_consumedBits += lzcount; |
3492 | |
3493 | if (bs_consumedBits <= riceParamPlus1MaxConsumedBits) { |
f5b7bb83 |
3494 | /* Getting here means the rice parameter part is wholly contained within the current cache line. */ |
3495 | pRiceParamPartOut[0] = (drflac_uint32)(bs_cache >> riceParamPlus1Shift); |
3496 | bs_cache <<= riceParamPlus1; |
3497 | bs_consumedBits += riceParamPlus1; |
2ff0b512 |
3498 | } else { |
f5b7bb83 |
3499 | drflac_uint32 riceParamPartHi; |
3500 | drflac_uint32 riceParamPartLo; |
3501 | drflac_uint32 riceParamPartLoBitCount; |
2ff0b512 |
3502 | |
f5b7bb83 |
3503 | /* |
3504 | Getting here means the rice parameter part straddles the cache line. We need to read from the tail of the current cache |
3505 | line, reload the cache, and then combine it with the head of the next cache line. |
3506 | */ |
2ff0b512 |
3507 | |
f5b7bb83 |
3508 | /* Grab the high part of the rice parameter part. */ |
3509 | riceParamPartHi = (drflac_uint32)(bs_cache >> riceParamPlus1Shift); |
2ff0b512 |
3510 | |
f5b7bb83 |
3511 | /* Before reloading the cache we need to grab the size in bits of the low part. */ |
3512 | riceParamPartLoBitCount = bs_consumedBits - riceParamPlus1MaxConsumedBits; |
3513 | DRFLAC_ASSERT(riceParamPartLoBitCount > 0 && riceParamPartLoBitCount < 32); |
2ff0b512 |
3514 | |
f5b7bb83 |
3515 | /* Now reload the cache. */ |
3516 | if (bs->nextL2Line < DRFLAC_CACHE_L2_LINE_COUNT(bs)) { |
3517 | #ifndef DR_FLAC_NO_CRC |
3518 | drflac__update_crc16(bs); |
3519 | #endif |
3520 | bs_cache = drflac__be2host__cache_line(bs->cacheL2[bs->nextL2Line++]); |
3521 | bs_consumedBits = riceParamPartLoBitCount; |
3522 | #ifndef DR_FLAC_NO_CRC |
3523 | bs->crc16Cache = bs_cache; |
3524 | #endif |
3525 | } else { |
3526 | /* Slow path. We need to fetch more data from the client. */ |
3527 | if (!drflac__reload_cache(bs)) { |
3528 | return DRFLAC_FALSE; |
3529 | } |
9e052883 |
3530 | if (riceParamPartLoBitCount > DRFLAC_CACHE_L1_BITS_REMAINING(bs)) { |
3531 | /* This happens when we get to end of stream */ |
3532 | return DRFLAC_FALSE; |
3533 | } |
2ff0b512 |
3534 | |
f5b7bb83 |
3535 | bs_cache = bs->cache; |
3536 | bs_consumedBits = bs->consumedBits + riceParamPartLoBitCount; |
3537 | } |
2ff0b512 |
3538 | |
3539 | /* We should now have enough information to construct the rice parameter part. */ |
3540 | riceParamPartLo = (drflac_uint32)(bs_cache >> (DRFLAC_CACHE_L1_SELECTION_SHIFT(bs, riceParamPartLoBitCount))); |
3541 | pRiceParamPartOut[0] = riceParamPartHi | riceParamPartLo; |
3542 | |
3543 | bs_cache <<= riceParamPartLoBitCount; |
3544 | } |
3545 | } else { |
3546 | /* |
3547 | Getting here means there are no bits set on the cache line. This is a less optimal case because we just wasted a call |
3548 | to drflac__clz() and we need to reload the cache. |
3549 | */ |
3550 | drflac_uint32 zeroCounter = (drflac_uint32)(DRFLAC_CACHE_L1_SIZE_BITS(bs) - bs_consumedBits); |
3551 | for (;;) { |
3552 | if (bs->nextL2Line < DRFLAC_CACHE_L2_LINE_COUNT(bs)) { |
3553 | #ifndef DR_FLAC_NO_CRC |
3554 | drflac__update_crc16(bs); |
3555 | #endif |
3556 | bs_cache = drflac__be2host__cache_line(bs->cacheL2[bs->nextL2Line++]); |
3557 | bs_consumedBits = 0; |
3558 | #ifndef DR_FLAC_NO_CRC |
3559 | bs->crc16Cache = bs_cache; |
3560 | #endif |
3561 | } else { |
3562 | /* Slow path. We need to fetch more data from the client. */ |
3563 | if (!drflac__reload_cache(bs)) { |
3564 | return DRFLAC_FALSE; |
3565 | } |
3566 | |
3567 | bs_cache = bs->cache; |
3568 | bs_consumedBits = bs->consumedBits; |
3569 | } |
3570 | |
3571 | lzcount = drflac__clz(bs_cache); |
3572 | zeroCounter += lzcount; |
3573 | |
3574 | if (lzcount < sizeof(bs_cache)*8) { |
3575 | break; |
3576 | } |
3577 | } |
3578 | |
3579 | pZeroCounterOut[0] = zeroCounter; |
3580 | goto extract_rice_param_part; |
3581 | } |
3582 | |
3583 | /* Make sure the cache is restored at the end of it all. */ |
3584 | bs->cache = bs_cache; |
3585 | bs->consumedBits = bs_consumedBits; |
3586 | |
3587 | return DRFLAC_TRUE; |
3588 | } |
3589 | |
3590 | static DRFLAC_INLINE drflac_bool32 drflac__seek_rice_parts(drflac_bs* bs, drflac_uint8 riceParam) |
3591 | { |
3592 | drflac_uint32 riceParamPlus1 = riceParam + 1; |
3593 | drflac_uint32 riceParamPlus1MaxConsumedBits = DRFLAC_CACHE_L1_SIZE_BITS(bs) - riceParamPlus1; |
3594 | |
3595 | /* |
3596 | 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 |
3597 | no idea how this will work in practice... |
3598 | */ |
3599 | drflac_cache_t bs_cache = bs->cache; |
3600 | drflac_uint32 bs_consumedBits = bs->consumedBits; |
3601 | |
3602 | /* The first thing to do is find the first unset bit. Most likely a bit will be set in the current cache line. */ |
3603 | drflac_uint32 lzcount = drflac__clz(bs_cache); |
3604 | if (lzcount < sizeof(bs_cache)*8) { |
3605 | /* |
3606 | It is most likely that the riceParam part (which comes after the zero counter) is also on this cache line. When extracting |
3607 | this, we include the set bit from the unary coded part because it simplifies cache management. This bit will be handled |
3608 | outside of this function at a higher level. |
3609 | */ |
3610 | extract_rice_param_part: |
3611 | bs_cache <<= lzcount; |
3612 | bs_consumedBits += lzcount; |
3613 | |
3614 | if (bs_consumedBits <= riceParamPlus1MaxConsumedBits) { |
3615 | /* Getting here means the rice parameter part is wholly contained within the current cache line. */ |
3616 | bs_cache <<= riceParamPlus1; |
3617 | bs_consumedBits += riceParamPlus1; |
3618 | } else { |
3619 | /* |
3620 | Getting here means the rice parameter part straddles the cache line. We need to read from the tail of the current cache |
3621 | line, reload the cache, and then combine it with the head of the next cache line. |
3622 | */ |
3623 | |
3624 | /* Before reloading the cache we need to grab the size in bits of the low part. */ |
3625 | drflac_uint32 riceParamPartLoBitCount = bs_consumedBits - riceParamPlus1MaxConsumedBits; |
3626 | DRFLAC_ASSERT(riceParamPartLoBitCount > 0 && riceParamPartLoBitCount < 32); |
3627 | |
3628 | /* Now reload the cache. */ |
3629 | if (bs->nextL2Line < DRFLAC_CACHE_L2_LINE_COUNT(bs)) { |
3630 | #ifndef DR_FLAC_NO_CRC |
3631 | drflac__update_crc16(bs); |
3632 | #endif |
3633 | bs_cache = drflac__be2host__cache_line(bs->cacheL2[bs->nextL2Line++]); |
3634 | bs_consumedBits = riceParamPartLoBitCount; |
3635 | #ifndef DR_FLAC_NO_CRC |
3636 | bs->crc16Cache = bs_cache; |
3637 | #endif |
3638 | } else { |
3639 | /* Slow path. We need to fetch more data from the client. */ |
3640 | if (!drflac__reload_cache(bs)) { |
3641 | return DRFLAC_FALSE; |
3642 | } |
3643 | |
9e052883 |
3644 | if (riceParamPartLoBitCount > DRFLAC_CACHE_L1_BITS_REMAINING(bs)) { |
3645 | /* This happens when we get to end of stream */ |
3646 | return DRFLAC_FALSE; |
3647 | } |
3648 | |
2ff0b512 |
3649 | bs_cache = bs->cache; |
3650 | bs_consumedBits = bs->consumedBits + riceParamPartLoBitCount; |
3651 | } |
3652 | |
3653 | bs_cache <<= riceParamPartLoBitCount; |
3654 | } |
3655 | } else { |
3656 | /* |
3657 | Getting here means there are no bits set on the cache line. This is a less optimal case because we just wasted a call |
3658 | to drflac__clz() and we need to reload the cache. |
3659 | */ |
3660 | for (;;) { |
3661 | if (bs->nextL2Line < DRFLAC_CACHE_L2_LINE_COUNT(bs)) { |
3662 | #ifndef DR_FLAC_NO_CRC |
3663 | drflac__update_crc16(bs); |
3664 | #endif |
3665 | bs_cache = drflac__be2host__cache_line(bs->cacheL2[bs->nextL2Line++]); |
3666 | bs_consumedBits = 0; |
3667 | #ifndef DR_FLAC_NO_CRC |
3668 | bs->crc16Cache = bs_cache; |
3669 | #endif |
3670 | } else { |
3671 | /* Slow path. We need to fetch more data from the client. */ |
3672 | if (!drflac__reload_cache(bs)) { |
3673 | return DRFLAC_FALSE; |
3674 | } |
3675 | |
3676 | bs_cache = bs->cache; |
3677 | bs_consumedBits = bs->consumedBits; |
3678 | } |
3679 | |
3680 | lzcount = drflac__clz(bs_cache); |
3681 | if (lzcount < sizeof(bs_cache)*8) { |
3682 | break; |
3683 | } |
3684 | } |
3685 | |
3686 | goto extract_rice_param_part; |
3687 | } |
3688 | |
3689 | /* Make sure the cache is restored at the end of it all. */ |
3690 | bs->cache = bs_cache; |
3691 | bs->consumedBits = bs_consumedBits; |
3692 | |
3693 | return DRFLAC_TRUE; |
3694 | } |
3695 | |
3696 | |
3697 | 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) |
3698 | { |
3699 | drflac_uint32 t[2] = {0x00000000, 0xFFFFFFFF}; |
3700 | drflac_uint32 zeroCountPart0; |
3701 | drflac_uint32 riceParamPart0; |
3702 | drflac_uint32 riceParamMask; |
3703 | drflac_uint32 i; |
3704 | |
3705 | DRFLAC_ASSERT(bs != NULL); |
2ff0b512 |
3706 | DRFLAC_ASSERT(pSamplesOut != NULL); |
3707 | |
3708 | (void)bitsPerSample; |
3709 | (void)order; |
3710 | (void)shift; |
3711 | (void)coefficients; |
3712 | |
3713 | riceParamMask = (drflac_uint32)~((~0UL) << riceParam); |
3714 | |
3715 | i = 0; |
3716 | while (i < count) { |
3717 | /* Rice extraction. */ |
3718 | if (!drflac__read_rice_parts_x1(bs, riceParam, &zeroCountPart0, &riceParamPart0)) { |
3719 | return DRFLAC_FALSE; |
3720 | } |
3721 | |
3722 | /* Rice reconstruction. */ |
3723 | riceParamPart0 &= riceParamMask; |
3724 | riceParamPart0 |= (zeroCountPart0 << riceParam); |
3725 | riceParamPart0 = (riceParamPart0 >> 1) ^ t[riceParamPart0 & 0x01]; |
3726 | |
3727 | pSamplesOut[i] = riceParamPart0; |
3728 | |
3729 | i += 1; |
3730 | } |
3731 | |
3732 | return DRFLAC_TRUE; |
3733 | } |
3734 | |
9e052883 |
3735 | static drflac_bool32 drflac__decode_samples_with_residual__rice__scalar(drflac_bs* bs, drflac_uint32 bitsPerSample, drflac_uint32 count, drflac_uint8 riceParam, drflac_uint32 lpcOrder, drflac_int32 lpcShift, drflac_uint32 lpcPrecision, const drflac_int32* coefficients, drflac_int32* pSamplesOut) |
2ff0b512 |
3736 | { |
3737 | drflac_uint32 t[2] = {0x00000000, 0xFFFFFFFF}; |
3738 | drflac_uint32 zeroCountPart0 = 0; |
3739 | drflac_uint32 zeroCountPart1 = 0; |
3740 | drflac_uint32 zeroCountPart2 = 0; |
3741 | drflac_uint32 zeroCountPart3 = 0; |
3742 | drflac_uint32 riceParamPart0 = 0; |
3743 | drflac_uint32 riceParamPart1 = 0; |
3744 | drflac_uint32 riceParamPart2 = 0; |
3745 | drflac_uint32 riceParamPart3 = 0; |
3746 | drflac_uint32 riceParamMask; |
3747 | const drflac_int32* pSamplesOutEnd; |
3748 | drflac_uint32 i; |
3749 | |
3750 | DRFLAC_ASSERT(bs != NULL); |
2ff0b512 |
3751 | DRFLAC_ASSERT(pSamplesOut != NULL); |
3752 | |
9e052883 |
3753 | if (lpcOrder == 0) { |
3754 | return drflac__decode_samples_with_residual__rice__scalar_zeroorder(bs, bitsPerSample, count, riceParam, lpcOrder, lpcShift, coefficients, pSamplesOut); |
2ff0b512 |
3755 | } |
3756 | |
3757 | riceParamMask = (drflac_uint32)~((~0UL) << riceParam); |
3758 | pSamplesOutEnd = pSamplesOut + (count & ~3); |
3759 | |
9e052883 |
3760 | if (drflac__use_64_bit_prediction(bitsPerSample, lpcOrder, lpcPrecision)) { |
2ff0b512 |
3761 | while (pSamplesOut < pSamplesOutEnd) { |
3762 | /* |
3763 | Rice extraction. It's faster to do this one at a time against local variables than it is to use the x4 version |
3764 | against an array. Not sure why, but perhaps it's making more efficient use of registers? |
3765 | */ |
3766 | if (!drflac__read_rice_parts_x1(bs, riceParam, &zeroCountPart0, &riceParamPart0) || |
3767 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountPart1, &riceParamPart1) || |
3768 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountPart2, &riceParamPart2) || |
3769 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountPart3, &riceParamPart3)) { |
3770 | return DRFLAC_FALSE; |
3771 | } |
3772 | |
3773 | riceParamPart0 &= riceParamMask; |
3774 | riceParamPart1 &= riceParamMask; |
3775 | riceParamPart2 &= riceParamMask; |
3776 | riceParamPart3 &= riceParamMask; |
3777 | |
3778 | riceParamPart0 |= (zeroCountPart0 << riceParam); |
3779 | riceParamPart1 |= (zeroCountPart1 << riceParam); |
3780 | riceParamPart2 |= (zeroCountPart2 << riceParam); |
3781 | riceParamPart3 |= (zeroCountPart3 << riceParam); |
3782 | |
3783 | riceParamPart0 = (riceParamPart0 >> 1) ^ t[riceParamPart0 & 0x01]; |
3784 | riceParamPart1 = (riceParamPart1 >> 1) ^ t[riceParamPart1 & 0x01]; |
3785 | riceParamPart2 = (riceParamPart2 >> 1) ^ t[riceParamPart2 & 0x01]; |
3786 | riceParamPart3 = (riceParamPart3 >> 1) ^ t[riceParamPart3 & 0x01]; |
3787 | |
9e052883 |
3788 | pSamplesOut[0] = riceParamPart0 + drflac__calculate_prediction_64(lpcOrder, lpcShift, coefficients, pSamplesOut + 0); |
3789 | pSamplesOut[1] = riceParamPart1 + drflac__calculate_prediction_64(lpcOrder, lpcShift, coefficients, pSamplesOut + 1); |
3790 | pSamplesOut[2] = riceParamPart2 + drflac__calculate_prediction_64(lpcOrder, lpcShift, coefficients, pSamplesOut + 2); |
3791 | pSamplesOut[3] = riceParamPart3 + drflac__calculate_prediction_64(lpcOrder, lpcShift, coefficients, pSamplesOut + 3); |
2ff0b512 |
3792 | |
3793 | pSamplesOut += 4; |
3794 | } |
3795 | } else { |
3796 | while (pSamplesOut < pSamplesOutEnd) { |
3797 | if (!drflac__read_rice_parts_x1(bs, riceParam, &zeroCountPart0, &riceParamPart0) || |
3798 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountPart1, &riceParamPart1) || |
3799 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountPart2, &riceParamPart2) || |
3800 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountPart3, &riceParamPart3)) { |
3801 | return DRFLAC_FALSE; |
3802 | } |
3803 | |
3804 | riceParamPart0 &= riceParamMask; |
3805 | riceParamPart1 &= riceParamMask; |
3806 | riceParamPart2 &= riceParamMask; |
3807 | riceParamPart3 &= riceParamMask; |
3808 | |
3809 | riceParamPart0 |= (zeroCountPart0 << riceParam); |
3810 | riceParamPart1 |= (zeroCountPart1 << riceParam); |
3811 | riceParamPart2 |= (zeroCountPart2 << riceParam); |
3812 | riceParamPart3 |= (zeroCountPart3 << riceParam); |
3813 | |
3814 | riceParamPart0 = (riceParamPart0 >> 1) ^ t[riceParamPart0 & 0x01]; |
3815 | riceParamPart1 = (riceParamPart1 >> 1) ^ t[riceParamPart1 & 0x01]; |
3816 | riceParamPart2 = (riceParamPart2 >> 1) ^ t[riceParamPart2 & 0x01]; |
3817 | riceParamPart3 = (riceParamPart3 >> 1) ^ t[riceParamPart3 & 0x01]; |
3818 | |
9e052883 |
3819 | pSamplesOut[0] = riceParamPart0 + drflac__calculate_prediction_32(lpcOrder, lpcShift, coefficients, pSamplesOut + 0); |
3820 | pSamplesOut[1] = riceParamPart1 + drflac__calculate_prediction_32(lpcOrder, lpcShift, coefficients, pSamplesOut + 1); |
3821 | pSamplesOut[2] = riceParamPart2 + drflac__calculate_prediction_32(lpcOrder, lpcShift, coefficients, pSamplesOut + 2); |
3822 | pSamplesOut[3] = riceParamPart3 + drflac__calculate_prediction_32(lpcOrder, lpcShift, coefficients, pSamplesOut + 3); |
2ff0b512 |
3823 | |
3824 | pSamplesOut += 4; |
3825 | } |
3826 | } |
3827 | |
3828 | i = (count & ~3); |
3829 | while (i < count) { |
3830 | /* Rice extraction. */ |
3831 | if (!drflac__read_rice_parts_x1(bs, riceParam, &zeroCountPart0, &riceParamPart0)) { |
3832 | return DRFLAC_FALSE; |
3833 | } |
3834 | |
3835 | /* Rice reconstruction. */ |
3836 | riceParamPart0 &= riceParamMask; |
3837 | riceParamPart0 |= (zeroCountPart0 << riceParam); |
3838 | riceParamPart0 = (riceParamPart0 >> 1) ^ t[riceParamPart0 & 0x01]; |
3839 | /*riceParamPart0 = (riceParamPart0 >> 1) ^ (~(riceParamPart0 & 0x01) + 1);*/ |
3840 | |
3841 | /* Sample reconstruction. */ |
9e052883 |
3842 | if (drflac__use_64_bit_prediction(bitsPerSample, lpcOrder, lpcPrecision)) { |
3843 | pSamplesOut[0] = riceParamPart0 + drflac__calculate_prediction_64(lpcOrder, lpcShift, coefficients, pSamplesOut + 0); |
2ff0b512 |
3844 | } else { |
9e052883 |
3845 | pSamplesOut[0] = riceParamPart0 + drflac__calculate_prediction_32(lpcOrder, lpcShift, coefficients, pSamplesOut + 0); |
2ff0b512 |
3846 | } |
3847 | |
3848 | i += 1; |
3849 | pSamplesOut += 1; |
3850 | } |
3851 | |
3852 | return DRFLAC_TRUE; |
3853 | } |
3854 | |
3855 | #if defined(DRFLAC_SUPPORT_SSE2) |
3856 | static DRFLAC_INLINE __m128i drflac__mm_packs_interleaved_epi32(__m128i a, __m128i b) |
3857 | { |
3858 | __m128i r; |
3859 | |
3860 | /* Pack. */ |
3861 | r = _mm_packs_epi32(a, b); |
3862 | |
3863 | /* a3a2 a1a0 b3b2 b1b0 -> a3a2 b3b2 a1a0 b1b0 */ |
3864 | r = _mm_shuffle_epi32(r, _MM_SHUFFLE(3, 1, 2, 0)); |
3865 | |
3866 | /* a3a2 b3b2 a1a0 b1b0 -> a3b3 a2b2 a1b1 a0b0 */ |
3867 | r = _mm_shufflehi_epi16(r, _MM_SHUFFLE(3, 1, 2, 0)); |
3868 | r = _mm_shufflelo_epi16(r, _MM_SHUFFLE(3, 1, 2, 0)); |
3869 | |
3870 | return r; |
3871 | } |
3872 | #endif |
3873 | |
3874 | #if defined(DRFLAC_SUPPORT_SSE41) |
3875 | static DRFLAC_INLINE __m128i drflac__mm_not_si128(__m128i a) |
3876 | { |
3877 | return _mm_xor_si128(a, _mm_cmpeq_epi32(_mm_setzero_si128(), _mm_setzero_si128())); |
3878 | } |
3879 | |
3880 | static DRFLAC_INLINE __m128i drflac__mm_hadd_epi32(__m128i x) |
3881 | { |
3882 | __m128i x64 = _mm_add_epi32(x, _mm_shuffle_epi32(x, _MM_SHUFFLE(1, 0, 3, 2))); |
3883 | __m128i x32 = _mm_shufflelo_epi16(x64, _MM_SHUFFLE(1, 0, 3, 2)); |
3884 | return _mm_add_epi32(x64, x32); |
3885 | } |
3886 | |
3887 | static DRFLAC_INLINE __m128i drflac__mm_hadd_epi64(__m128i x) |
3888 | { |
3889 | return _mm_add_epi64(x, _mm_shuffle_epi32(x, _MM_SHUFFLE(1, 0, 3, 2))); |
3890 | } |
3891 | |
3892 | static DRFLAC_INLINE __m128i drflac__mm_srai_epi64(__m128i x, int count) |
3893 | { |
3894 | /* |
3895 | 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 |
3896 | is shifted with zero bits, whereas the right side is shifted with sign bits. |
3897 | */ |
3898 | __m128i lo = _mm_srli_epi64(x, count); |
3899 | __m128i hi = _mm_srai_epi32(x, count); |
3900 | |
3901 | hi = _mm_and_si128(hi, _mm_set_epi32(0xFFFFFFFF, 0, 0xFFFFFFFF, 0)); /* The high part needs to have the low part cleared. */ |
3902 | |
3903 | return _mm_or_si128(lo, hi); |
3904 | } |
3905 | |
3906 | 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) |
3907 | { |
3908 | int i; |
3909 | drflac_uint32 riceParamMask; |
3910 | drflac_int32* pDecodedSamples = pSamplesOut; |
3911 | drflac_int32* pDecodedSamplesEnd = pSamplesOut + (count & ~3); |
3912 | drflac_uint32 zeroCountParts0 = 0; |
3913 | drflac_uint32 zeroCountParts1 = 0; |
3914 | drflac_uint32 zeroCountParts2 = 0; |
3915 | drflac_uint32 zeroCountParts3 = 0; |
3916 | drflac_uint32 riceParamParts0 = 0; |
3917 | drflac_uint32 riceParamParts1 = 0; |
3918 | drflac_uint32 riceParamParts2 = 0; |
3919 | drflac_uint32 riceParamParts3 = 0; |
3920 | __m128i coefficients128_0; |
3921 | __m128i coefficients128_4; |
3922 | __m128i coefficients128_8; |
3923 | __m128i samples128_0; |
3924 | __m128i samples128_4; |
3925 | __m128i samples128_8; |
3926 | __m128i riceParamMask128; |
3927 | |
3928 | const drflac_uint32 t[2] = {0x00000000, 0xFFFFFFFF}; |
3929 | |
3930 | riceParamMask = (drflac_uint32)~((~0UL) << riceParam); |
3931 | riceParamMask128 = _mm_set1_epi32(riceParamMask); |
3932 | |
3933 | /* Pre-load. */ |
3934 | coefficients128_0 = _mm_setzero_si128(); |
3935 | coefficients128_4 = _mm_setzero_si128(); |
3936 | coefficients128_8 = _mm_setzero_si128(); |
3937 | |
3938 | samples128_0 = _mm_setzero_si128(); |
3939 | samples128_4 = _mm_setzero_si128(); |
3940 | samples128_8 = _mm_setzero_si128(); |
3941 | |
3942 | /* |
3943 | Pre-loading the coefficients and prior samples is annoying because we need to ensure we don't try reading more than |
3944 | what's available in the input buffers. It would be convenient to use a fall-through switch to do this, but this results |
3945 | in strict aliasing warnings with GCC. To work around this I'm just doing something hacky. This feels a bit convoluted |
3946 | so I think there's opportunity for this to be simplified. |
3947 | */ |
3948 | #if 1 |
3949 | { |
3950 | int runningOrder = order; |
3951 | |
3952 | /* 0 - 3. */ |
3953 | if (runningOrder >= 4) { |
3954 | coefficients128_0 = _mm_loadu_si128((const __m128i*)(coefficients + 0)); |
3955 | samples128_0 = _mm_loadu_si128((const __m128i*)(pSamplesOut - 4)); |
3956 | runningOrder -= 4; |
3957 | } else { |
3958 | switch (runningOrder) { |
3959 | 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; |
3960 | 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; |
3961 | case 1: coefficients128_0 = _mm_set_epi32(0, 0, 0, coefficients[0]); samples128_0 = _mm_set_epi32(pSamplesOut[-1], 0, 0, 0); break; |
3962 | } |
3963 | runningOrder = 0; |
3964 | } |
3965 | |
3966 | /* 4 - 7 */ |
3967 | if (runningOrder >= 4) { |
3968 | coefficients128_4 = _mm_loadu_si128((const __m128i*)(coefficients + 4)); |
3969 | samples128_4 = _mm_loadu_si128((const __m128i*)(pSamplesOut - 8)); |
3970 | runningOrder -= 4; |
3971 | } else { |
3972 | switch (runningOrder) { |
3973 | 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; |
3974 | 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; |
3975 | case 1: coefficients128_4 = _mm_set_epi32(0, 0, 0, coefficients[4]); samples128_4 = _mm_set_epi32(pSamplesOut[-5], 0, 0, 0); break; |
3976 | } |
3977 | runningOrder = 0; |
3978 | } |
3979 | |
3980 | /* 8 - 11 */ |
3981 | if (runningOrder == 4) { |
3982 | coefficients128_8 = _mm_loadu_si128((const __m128i*)(coefficients + 8)); |
3983 | samples128_8 = _mm_loadu_si128((const __m128i*)(pSamplesOut - 12)); |
3984 | runningOrder -= 4; |
3985 | } else { |
3986 | switch (runningOrder) { |
3987 | 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; |
3988 | 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; |
3989 | case 1: coefficients128_8 = _mm_set_epi32(0, 0, 0, coefficients[8]); samples128_8 = _mm_set_epi32(pSamplesOut[-9], 0, 0, 0); break; |
3990 | } |
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 = _mm_shuffle_epi32(coefficients128_0, _MM_SHUFFLE(0, 1, 2, 3)); |
3996 | coefficients128_4 = _mm_shuffle_epi32(coefficients128_4, _MM_SHUFFLE(0, 1, 2, 3)); |
3997 | coefficients128_8 = _mm_shuffle_epi32(coefficients128_8, _MM_SHUFFLE(0, 1, 2, 3)); |
3998 | } |
3999 | #else |
4000 | /* This causes strict-aliasing warnings with GCC. */ |
4001 | switch (order) |
4002 | { |
4003 | case 12: ((drflac_int32*)&coefficients128_8)[0] = coefficients[11]; ((drflac_int32*)&samples128_8)[0] = pDecodedSamples[-12]; |
4004 | case 11: ((drflac_int32*)&coefficients128_8)[1] = coefficients[10]; ((drflac_int32*)&samples128_8)[1] = pDecodedSamples[-11]; |
4005 | case 10: ((drflac_int32*)&coefficients128_8)[2] = coefficients[ 9]; ((drflac_int32*)&samples128_8)[2] = pDecodedSamples[-10]; |
4006 | case 9: ((drflac_int32*)&coefficients128_8)[3] = coefficients[ 8]; ((drflac_int32*)&samples128_8)[3] = pDecodedSamples[- 9]; |
4007 | case 8: ((drflac_int32*)&coefficients128_4)[0] = coefficients[ 7]; ((drflac_int32*)&samples128_4)[0] = pDecodedSamples[- 8]; |
4008 | case 7: ((drflac_int32*)&coefficients128_4)[1] = coefficients[ 6]; ((drflac_int32*)&samples128_4)[1] = pDecodedSamples[- 7]; |
4009 | case 6: ((drflac_int32*)&coefficients128_4)[2] = coefficients[ 5]; ((drflac_int32*)&samples128_4)[2] = pDecodedSamples[- 6]; |
4010 | case 5: ((drflac_int32*)&coefficients128_4)[3] = coefficients[ 4]; ((drflac_int32*)&samples128_4)[3] = pDecodedSamples[- 5]; |
4011 | case 4: ((drflac_int32*)&coefficients128_0)[0] = coefficients[ 3]; ((drflac_int32*)&samples128_0)[0] = pDecodedSamples[- 4]; |
4012 | case 3: ((drflac_int32*)&coefficients128_0)[1] = coefficients[ 2]; ((drflac_int32*)&samples128_0)[1] = pDecodedSamples[- 3]; |
4013 | case 2: ((drflac_int32*)&coefficients128_0)[2] = coefficients[ 1]; ((drflac_int32*)&samples128_0)[2] = pDecodedSamples[- 2]; |
4014 | case 1: ((drflac_int32*)&coefficients128_0)[3] = coefficients[ 0]; ((drflac_int32*)&samples128_0)[3] = pDecodedSamples[- 1]; |
4015 | } |
4016 | #endif |
4017 | |
4018 | /* For this version we are doing one sample at a time. */ |
4019 | while (pDecodedSamples < pDecodedSamplesEnd) { |
4020 | __m128i prediction128; |
4021 | __m128i zeroCountPart128; |
4022 | __m128i riceParamPart128; |
4023 | |
4024 | if (!drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts0, &riceParamParts0) || |
4025 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts1, &riceParamParts1) || |
4026 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts2, &riceParamParts2) || |
4027 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts3, &riceParamParts3)) { |
4028 | return DRFLAC_FALSE; |
4029 | } |
4030 | |
4031 | zeroCountPart128 = _mm_set_epi32(zeroCountParts3, zeroCountParts2, zeroCountParts1, zeroCountParts0); |
4032 | riceParamPart128 = _mm_set_epi32(riceParamParts3, riceParamParts2, riceParamParts1, riceParamParts0); |
4033 | |
4034 | riceParamPart128 = _mm_and_si128(riceParamPart128, riceParamMask128); |
4035 | riceParamPart128 = _mm_or_si128(riceParamPart128, _mm_slli_epi32(zeroCountPart128, riceParam)); |
4036 | 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 */ |
4037 | /*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... */ |
4038 | |
4039 | if (order <= 4) { |
4040 | for (i = 0; i < 4; i += 1) { |
4041 | prediction128 = _mm_mullo_epi32(coefficients128_0, samples128_0); |
4042 | |
4043 | /* Horizontal add and shift. */ |
4044 | prediction128 = drflac__mm_hadd_epi32(prediction128); |
4045 | prediction128 = _mm_srai_epi32(prediction128, shift); |
4046 | prediction128 = _mm_add_epi32(riceParamPart128, prediction128); |
4047 | |
4048 | samples128_0 = _mm_alignr_epi8(prediction128, samples128_0, 4); |
4049 | riceParamPart128 = _mm_alignr_epi8(_mm_setzero_si128(), riceParamPart128, 4); |
4050 | } |
4051 | } else if (order <= 8) { |
4052 | for (i = 0; i < 4; i += 1) { |
4053 | prediction128 = _mm_mullo_epi32(coefficients128_4, samples128_4); |
4054 | prediction128 = _mm_add_epi32(prediction128, _mm_mullo_epi32(coefficients128_0, samples128_0)); |
4055 | |
4056 | /* Horizontal add and shift. */ |
4057 | prediction128 = drflac__mm_hadd_epi32(prediction128); |
4058 | prediction128 = _mm_srai_epi32(prediction128, shift); |
4059 | prediction128 = _mm_add_epi32(riceParamPart128, prediction128); |
4060 | |
4061 | samples128_4 = _mm_alignr_epi8(samples128_0, samples128_4, 4); |
4062 | samples128_0 = _mm_alignr_epi8(prediction128, samples128_0, 4); |
4063 | riceParamPart128 = _mm_alignr_epi8(_mm_setzero_si128(), riceParamPart128, 4); |
4064 | } |
4065 | } else { |
4066 | for (i = 0; i < 4; i += 1) { |
4067 | prediction128 = _mm_mullo_epi32(coefficients128_8, samples128_8); |
4068 | prediction128 = _mm_add_epi32(prediction128, _mm_mullo_epi32(coefficients128_4, samples128_4)); |
4069 | prediction128 = _mm_add_epi32(prediction128, _mm_mullo_epi32(coefficients128_0, samples128_0)); |
4070 | |
4071 | /* Horizontal add and shift. */ |
4072 | prediction128 = drflac__mm_hadd_epi32(prediction128); |
4073 | prediction128 = _mm_srai_epi32(prediction128, shift); |
4074 | prediction128 = _mm_add_epi32(riceParamPart128, prediction128); |
4075 | |
4076 | samples128_8 = _mm_alignr_epi8(samples128_4, samples128_8, 4); |
4077 | samples128_4 = _mm_alignr_epi8(samples128_0, samples128_4, 4); |
4078 | samples128_0 = _mm_alignr_epi8(prediction128, samples128_0, 4); |
4079 | riceParamPart128 = _mm_alignr_epi8(_mm_setzero_si128(), riceParamPart128, 4); |
4080 | } |
4081 | } |
4082 | |
4083 | /* We store samples in groups of 4. */ |
4084 | _mm_storeu_si128((__m128i*)pDecodedSamples, samples128_0); |
4085 | pDecodedSamples += 4; |
4086 | } |
4087 | |
4088 | /* Make sure we process the last few samples. */ |
4089 | i = (count & ~3); |
4090 | while (i < (int)count) { |
4091 | /* Rice extraction. */ |
4092 | if (!drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts0, &riceParamParts0)) { |
4093 | return DRFLAC_FALSE; |
4094 | } |
4095 | |
4096 | /* Rice reconstruction. */ |
4097 | riceParamParts0 &= riceParamMask; |
4098 | riceParamParts0 |= (zeroCountParts0 << riceParam); |
4099 | riceParamParts0 = (riceParamParts0 >> 1) ^ t[riceParamParts0 & 0x01]; |
4100 | |
4101 | /* Sample reconstruction. */ |
4102 | pDecodedSamples[0] = riceParamParts0 + drflac__calculate_prediction_32(order, shift, coefficients, pDecodedSamples); |
4103 | |
4104 | i += 1; |
4105 | pDecodedSamples += 1; |
4106 | } |
4107 | |
4108 | return DRFLAC_TRUE; |
4109 | } |
4110 | |
4111 | 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) |
4112 | { |
4113 | int i; |
4114 | drflac_uint32 riceParamMask; |
4115 | drflac_int32* pDecodedSamples = pSamplesOut; |
4116 | drflac_int32* pDecodedSamplesEnd = pSamplesOut + (count & ~3); |
4117 | drflac_uint32 zeroCountParts0 = 0; |
4118 | drflac_uint32 zeroCountParts1 = 0; |
4119 | drflac_uint32 zeroCountParts2 = 0; |
4120 | drflac_uint32 zeroCountParts3 = 0; |
4121 | drflac_uint32 riceParamParts0 = 0; |
4122 | drflac_uint32 riceParamParts1 = 0; |
4123 | drflac_uint32 riceParamParts2 = 0; |
4124 | drflac_uint32 riceParamParts3 = 0; |
4125 | __m128i coefficients128_0; |
4126 | __m128i coefficients128_4; |
4127 | __m128i coefficients128_8; |
4128 | __m128i samples128_0; |
4129 | __m128i samples128_4; |
4130 | __m128i samples128_8; |
4131 | __m128i prediction128; |
4132 | __m128i riceParamMask128; |
4133 | |
4134 | const drflac_uint32 t[2] = {0x00000000, 0xFFFFFFFF}; |
4135 | |
4136 | DRFLAC_ASSERT(order <= 12); |
4137 | |
4138 | riceParamMask = (drflac_uint32)~((~0UL) << riceParam); |
4139 | riceParamMask128 = _mm_set1_epi32(riceParamMask); |
4140 | |
4141 | prediction128 = _mm_setzero_si128(); |
4142 | |
4143 | /* Pre-load. */ |
4144 | coefficients128_0 = _mm_setzero_si128(); |
4145 | coefficients128_4 = _mm_setzero_si128(); |
4146 | coefficients128_8 = _mm_setzero_si128(); |
4147 | |
4148 | samples128_0 = _mm_setzero_si128(); |
4149 | samples128_4 = _mm_setzero_si128(); |
4150 | samples128_8 = _mm_setzero_si128(); |
4151 | |
4152 | #if 1 |
4153 | { |
4154 | int runningOrder = order; |
4155 | |
4156 | /* 0 - 3. */ |
4157 | if (runningOrder >= 4) { |
4158 | coefficients128_0 = _mm_loadu_si128((const __m128i*)(coefficients + 0)); |
4159 | samples128_0 = _mm_loadu_si128((const __m128i*)(pSamplesOut - 4)); |
4160 | runningOrder -= 4; |
4161 | } else { |
4162 | switch (runningOrder) { |
4163 | 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; |
4164 | 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; |
4165 | case 1: coefficients128_0 = _mm_set_epi32(0, 0, 0, coefficients[0]); samples128_0 = _mm_set_epi32(pSamplesOut[-1], 0, 0, 0); break; |
4166 | } |
4167 | runningOrder = 0; |
4168 | } |
4169 | |
4170 | /* 4 - 7 */ |
4171 | if (runningOrder >= 4) { |
4172 | coefficients128_4 = _mm_loadu_si128((const __m128i*)(coefficients + 4)); |
4173 | samples128_4 = _mm_loadu_si128((const __m128i*)(pSamplesOut - 8)); |
4174 | runningOrder -= 4; |
4175 | } else { |
4176 | switch (runningOrder) { |
4177 | 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; |
4178 | 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; |
4179 | case 1: coefficients128_4 = _mm_set_epi32(0, 0, 0, coefficients[4]); samples128_4 = _mm_set_epi32(pSamplesOut[-5], 0, 0, 0); break; |
4180 | } |
4181 | runningOrder = 0; |
4182 | } |
4183 | |
4184 | /* 8 - 11 */ |
4185 | if (runningOrder == 4) { |
4186 | coefficients128_8 = _mm_loadu_si128((const __m128i*)(coefficients + 8)); |
4187 | samples128_8 = _mm_loadu_si128((const __m128i*)(pSamplesOut - 12)); |
4188 | runningOrder -= 4; |
4189 | } else { |
4190 | switch (runningOrder) { |
4191 | 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; |
4192 | 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; |
4193 | case 1: coefficients128_8 = _mm_set_epi32(0, 0, 0, coefficients[8]); samples128_8 = _mm_set_epi32(pSamplesOut[-9], 0, 0, 0); break; |
4194 | } |
4195 | runningOrder = 0; |
4196 | } |
4197 | |
4198 | /* Coefficients need to be shuffled for our streaming algorithm below to work. Samples are already in the correct order from the loading routine above. */ |
4199 | coefficients128_0 = _mm_shuffle_epi32(coefficients128_0, _MM_SHUFFLE(0, 1, 2, 3)); |
4200 | coefficients128_4 = _mm_shuffle_epi32(coefficients128_4, _MM_SHUFFLE(0, 1, 2, 3)); |
4201 | coefficients128_8 = _mm_shuffle_epi32(coefficients128_8, _MM_SHUFFLE(0, 1, 2, 3)); |
4202 | } |
4203 | #else |
4204 | switch (order) |
4205 | { |
4206 | case 12: ((drflac_int32*)&coefficients128_8)[0] = coefficients[11]; ((drflac_int32*)&samples128_8)[0] = pDecodedSamples[-12]; |
4207 | case 11: ((drflac_int32*)&coefficients128_8)[1] = coefficients[10]; ((drflac_int32*)&samples128_8)[1] = pDecodedSamples[-11]; |
4208 | case 10: ((drflac_int32*)&coefficients128_8)[2] = coefficients[ 9]; ((drflac_int32*)&samples128_8)[2] = pDecodedSamples[-10]; |
4209 | case 9: ((drflac_int32*)&coefficients128_8)[3] = coefficients[ 8]; ((drflac_int32*)&samples128_8)[3] = pDecodedSamples[- 9]; |
4210 | case 8: ((drflac_int32*)&coefficients128_4)[0] = coefficients[ 7]; ((drflac_int32*)&samples128_4)[0] = pDecodedSamples[- 8]; |
4211 | case 7: ((drflac_int32*)&coefficients128_4)[1] = coefficients[ 6]; ((drflac_int32*)&samples128_4)[1] = pDecodedSamples[- 7]; |
4212 | case 6: ((drflac_int32*)&coefficients128_4)[2] = coefficients[ 5]; ((drflac_int32*)&samples128_4)[2] = pDecodedSamples[- 6]; |
4213 | case 5: ((drflac_int32*)&coefficients128_4)[3] = coefficients[ 4]; ((drflac_int32*)&samples128_4)[3] = pDecodedSamples[- 5]; |
4214 | case 4: ((drflac_int32*)&coefficients128_0)[0] = coefficients[ 3]; ((drflac_int32*)&samples128_0)[0] = pDecodedSamples[- 4]; |
4215 | case 3: ((drflac_int32*)&coefficients128_0)[1] = coefficients[ 2]; ((drflac_int32*)&samples128_0)[1] = pDecodedSamples[- 3]; |
4216 | case 2: ((drflac_int32*)&coefficients128_0)[2] = coefficients[ 1]; ((drflac_int32*)&samples128_0)[2] = pDecodedSamples[- 2]; |
4217 | case 1: ((drflac_int32*)&coefficients128_0)[3] = coefficients[ 0]; ((drflac_int32*)&samples128_0)[3] = pDecodedSamples[- 1]; |
4218 | } |
4219 | #endif |
4220 | |
4221 | /* For this version we are doing one sample at a time. */ |
4222 | while (pDecodedSamples < pDecodedSamplesEnd) { |
4223 | __m128i zeroCountPart128; |
4224 | __m128i riceParamPart128; |
4225 | |
4226 | if (!drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts0, &riceParamParts0) || |
4227 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts1, &riceParamParts1) || |
4228 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts2, &riceParamParts2) || |
4229 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts3, &riceParamParts3)) { |
4230 | return DRFLAC_FALSE; |
4231 | } |
4232 | |
4233 | zeroCountPart128 = _mm_set_epi32(zeroCountParts3, zeroCountParts2, zeroCountParts1, zeroCountParts0); |
4234 | riceParamPart128 = _mm_set_epi32(riceParamParts3, riceParamParts2, riceParamParts1, riceParamParts0); |
4235 | |
4236 | riceParamPart128 = _mm_and_si128(riceParamPart128, riceParamMask128); |
4237 | riceParamPart128 = _mm_or_si128(riceParamPart128, _mm_slli_epi32(zeroCountPart128, riceParam)); |
4238 | 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))); |
4239 | |
4240 | for (i = 0; i < 4; i += 1) { |
4241 | prediction128 = _mm_xor_si128(prediction128, prediction128); /* Reset to 0. */ |
4242 | |
4243 | switch (order) |
4244 | { |
4245 | case 12: |
4246 | 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)))); |
4247 | case 10: |
4248 | 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)))); |
4249 | case 8: |
4250 | 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)))); |
4251 | case 6: |
4252 | 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)))); |
4253 | case 4: |
4254 | 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)))); |
4255 | case 2: |
4256 | 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)))); |
4257 | } |
4258 | |
4259 | /* Horizontal add and shift. */ |
4260 | prediction128 = drflac__mm_hadd_epi64(prediction128); |
4261 | prediction128 = drflac__mm_srai_epi64(prediction128, shift); |
4262 | prediction128 = _mm_add_epi32(riceParamPart128, prediction128); |
4263 | |
4264 | /* Our value should be sitting in prediction128[0]. We need to combine this with our SSE samples. */ |
4265 | samples128_8 = _mm_alignr_epi8(samples128_4, samples128_8, 4); |
4266 | samples128_4 = _mm_alignr_epi8(samples128_0, samples128_4, 4); |
4267 | samples128_0 = _mm_alignr_epi8(prediction128, samples128_0, 4); |
4268 | |
4269 | /* Slide our rice parameter down so that the value in position 0 contains the next one to process. */ |
4270 | riceParamPart128 = _mm_alignr_epi8(_mm_setzero_si128(), riceParamPart128, 4); |
4271 | } |
4272 | |
4273 | /* We store samples in groups of 4. */ |
4274 | _mm_storeu_si128((__m128i*)pDecodedSamples, samples128_0); |
4275 | pDecodedSamples += 4; |
4276 | } |
4277 | |
4278 | /* Make sure we process the last few samples. */ |
4279 | i = (count & ~3); |
4280 | while (i < (int)count) { |
4281 | /* Rice extraction. */ |
4282 | if (!drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts0, &riceParamParts0)) { |
4283 | return DRFLAC_FALSE; |
4284 | } |
4285 | |
4286 | /* Rice reconstruction. */ |
4287 | riceParamParts0 &= riceParamMask; |
4288 | riceParamParts0 |= (zeroCountParts0 << riceParam); |
4289 | riceParamParts0 = (riceParamParts0 >> 1) ^ t[riceParamParts0 & 0x01]; |
4290 | |
4291 | /* Sample reconstruction. */ |
4292 | pDecodedSamples[0] = riceParamParts0 + drflac__calculate_prediction_64(order, shift, coefficients, pDecodedSamples); |
4293 | |
4294 | i += 1; |
4295 | pDecodedSamples += 1; |
4296 | } |
4297 | |
4298 | return DRFLAC_TRUE; |
4299 | } |
4300 | |
9e052883 |
4301 | static drflac_bool32 drflac__decode_samples_with_residual__rice__sse41(drflac_bs* bs, drflac_uint32 bitsPerSample, drflac_uint32 count, drflac_uint8 riceParam, drflac_uint32 lpcOrder, drflac_int32 lpcShift, drflac_uint32 lpcPrecision, const drflac_int32* coefficients, drflac_int32* pSamplesOut) |
2ff0b512 |
4302 | { |
4303 | DRFLAC_ASSERT(bs != NULL); |
2ff0b512 |
4304 | DRFLAC_ASSERT(pSamplesOut != NULL); |
4305 | |
4306 | /* 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. */ |
9e052883 |
4307 | if (lpcOrder > 0 && lpcOrder <= 12) { |
4308 | if (drflac__use_64_bit_prediction(bitsPerSample, lpcOrder, lpcPrecision)) { |
4309 | return drflac__decode_samples_with_residual__rice__sse41_64(bs, count, riceParam, lpcOrder, lpcShift, coefficients, pSamplesOut); |
2ff0b512 |
4310 | } else { |
9e052883 |
4311 | return drflac__decode_samples_with_residual__rice__sse41_32(bs, count, riceParam, lpcOrder, lpcShift, coefficients, pSamplesOut); |
2ff0b512 |
4312 | } |
4313 | } else { |
9e052883 |
4314 | return drflac__decode_samples_with_residual__rice__scalar(bs, bitsPerSample, count, riceParam, lpcOrder, lpcShift, lpcPrecision, coefficients, pSamplesOut); |
2ff0b512 |
4315 | } |
4316 | } |
4317 | #endif |
4318 | |
4319 | #if defined(DRFLAC_SUPPORT_NEON) |
4320 | static DRFLAC_INLINE void drflac__vst2q_s32(drflac_int32* p, int32x4x2_t x) |
4321 | { |
4322 | vst1q_s32(p+0, x.val[0]); |
4323 | vst1q_s32(p+4, x.val[1]); |
4324 | } |
4325 | |
4326 | static DRFLAC_INLINE void drflac__vst2q_u32(drflac_uint32* p, uint32x4x2_t x) |
4327 | { |
4328 | vst1q_u32(p+0, x.val[0]); |
4329 | vst1q_u32(p+4, x.val[1]); |
4330 | } |
4331 | |
4332 | static DRFLAC_INLINE void drflac__vst2q_f32(float* p, float32x4x2_t x) |
4333 | { |
4334 | vst1q_f32(p+0, x.val[0]); |
4335 | vst1q_f32(p+4, x.val[1]); |
4336 | } |
4337 | |
4338 | static DRFLAC_INLINE void drflac__vst2q_s16(drflac_int16* p, int16x4x2_t x) |
4339 | { |
4340 | vst1q_s16(p, vcombine_s16(x.val[0], x.val[1])); |
4341 | } |
4342 | |
4343 | static DRFLAC_INLINE void drflac__vst2q_u16(drflac_uint16* p, uint16x4x2_t x) |
4344 | { |
4345 | vst1q_u16(p, vcombine_u16(x.val[0], x.val[1])); |
4346 | } |
4347 | |
4348 | static DRFLAC_INLINE int32x4_t drflac__vdupq_n_s32x4(drflac_int32 x3, drflac_int32 x2, drflac_int32 x1, drflac_int32 x0) |
4349 | { |
4350 | drflac_int32 x[4]; |
4351 | x[3] = x3; |
4352 | x[2] = x2; |
4353 | x[1] = x1; |
4354 | x[0] = x0; |
4355 | return vld1q_s32(x); |
4356 | } |
4357 | |
4358 | static DRFLAC_INLINE int32x4_t drflac__valignrq_s32_1(int32x4_t a, int32x4_t b) |
4359 | { |
4360 | /* Equivalent to SSE's _mm_alignr_epi8(a, b, 4) */ |
4361 | |
4362 | /* Reference */ |
4363 | /*return drflac__vdupq_n_s32x4( |
4364 | vgetq_lane_s32(a, 0), |
4365 | vgetq_lane_s32(b, 3), |
4366 | vgetq_lane_s32(b, 2), |
4367 | vgetq_lane_s32(b, 1) |
4368 | );*/ |
4369 | |
4370 | return vextq_s32(b, a, 1); |
4371 | } |
4372 | |
4373 | static DRFLAC_INLINE uint32x4_t drflac__valignrq_u32_1(uint32x4_t a, uint32x4_t b) |
4374 | { |
4375 | /* Equivalent to SSE's _mm_alignr_epi8(a, b, 4) */ |
4376 | |
4377 | /* Reference */ |
4378 | /*return drflac__vdupq_n_s32x4( |
4379 | vgetq_lane_s32(a, 0), |
4380 | vgetq_lane_s32(b, 3), |
4381 | vgetq_lane_s32(b, 2), |
4382 | vgetq_lane_s32(b, 1) |
4383 | );*/ |
4384 | |
4385 | return vextq_u32(b, a, 1); |
4386 | } |
4387 | |
4388 | static DRFLAC_INLINE int32x2_t drflac__vhaddq_s32(int32x4_t x) |
4389 | { |
4390 | /* The sum must end up in position 0. */ |
4391 | |
4392 | /* Reference */ |
4393 | /*return vdupq_n_s32( |
4394 | vgetq_lane_s32(x, 3) + |
4395 | vgetq_lane_s32(x, 2) + |
4396 | vgetq_lane_s32(x, 1) + |
4397 | vgetq_lane_s32(x, 0) |
4398 | );*/ |
4399 | |
4400 | int32x2_t r = vadd_s32(vget_high_s32(x), vget_low_s32(x)); |
4401 | return vpadd_s32(r, r); |
4402 | } |
4403 | |
4404 | static DRFLAC_INLINE int64x1_t drflac__vhaddq_s64(int64x2_t x) |
4405 | { |
4406 | return vadd_s64(vget_high_s64(x), vget_low_s64(x)); |
4407 | } |
4408 | |
4409 | static DRFLAC_INLINE int32x4_t drflac__vrevq_s32(int32x4_t x) |
4410 | { |
4411 | /* Reference */ |
4412 | /*return drflac__vdupq_n_s32x4( |
4413 | vgetq_lane_s32(x, 0), |
4414 | vgetq_lane_s32(x, 1), |
4415 | vgetq_lane_s32(x, 2), |
4416 | vgetq_lane_s32(x, 3) |
4417 | );*/ |
4418 | |
4419 | return vrev64q_s32(vcombine_s32(vget_high_s32(x), vget_low_s32(x))); |
4420 | } |
4421 | |
4422 | static DRFLAC_INLINE int32x4_t drflac__vnotq_s32(int32x4_t x) |
4423 | { |
4424 | return veorq_s32(x, vdupq_n_s32(0xFFFFFFFF)); |
4425 | } |
4426 | |
4427 | static DRFLAC_INLINE uint32x4_t drflac__vnotq_u32(uint32x4_t x) |
4428 | { |
4429 | return veorq_u32(x, vdupq_n_u32(0xFFFFFFFF)); |
4430 | } |
4431 | |
4432 | 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) |
4433 | { |
4434 | int i; |
4435 | drflac_uint32 riceParamMask; |
4436 | drflac_int32* pDecodedSamples = pSamplesOut; |
4437 | drflac_int32* pDecodedSamplesEnd = pSamplesOut + (count & ~3); |
4438 | drflac_uint32 zeroCountParts[4]; |
4439 | drflac_uint32 riceParamParts[4]; |
4440 | int32x4_t coefficients128_0; |
4441 | int32x4_t coefficients128_4; |
4442 | int32x4_t coefficients128_8; |
4443 | int32x4_t samples128_0; |
4444 | int32x4_t samples128_4; |
4445 | int32x4_t samples128_8; |
4446 | uint32x4_t riceParamMask128; |
4447 | int32x4_t riceParam128; |
4448 | int32x2_t shift64; |
4449 | uint32x4_t one128; |
4450 | |
4451 | const drflac_uint32 t[2] = {0x00000000, 0xFFFFFFFF}; |
4452 | |
9e052883 |
4453 | riceParamMask = (drflac_uint32)~((~0UL) << riceParam); |
2ff0b512 |
4454 | riceParamMask128 = vdupq_n_u32(riceParamMask); |
4455 | |
4456 | riceParam128 = vdupq_n_s32(riceParam); |
4457 | shift64 = vdup_n_s32(-shift); /* Negate the shift because we'll be doing a variable shift using vshlq_s32(). */ |
4458 | one128 = vdupq_n_u32(1); |
4459 | |
4460 | /* |
4461 | Pre-loading the coefficients and prior samples is annoying because we need to ensure we don't try reading more than |
4462 | what's available in the input buffers. It would be conenient to use a fall-through switch to do this, but this results |
4463 | in strict aliasing warnings with GCC. To work around this I'm just doing something hacky. This feels a bit convoluted |
4464 | so I think there's opportunity for this to be simplified. |
4465 | */ |
4466 | { |
4467 | int runningOrder = order; |
4468 | drflac_int32 tempC[4] = {0, 0, 0, 0}; |
4469 | drflac_int32 tempS[4] = {0, 0, 0, 0}; |
4470 | |
4471 | /* 0 - 3. */ |
4472 | if (runningOrder >= 4) { |
4473 | coefficients128_0 = vld1q_s32(coefficients + 0); |
4474 | samples128_0 = vld1q_s32(pSamplesOut - 4); |
4475 | runningOrder -= 4; |
4476 | } else { |
4477 | switch (runningOrder) { |
4478 | case 3: tempC[2] = coefficients[2]; tempS[1] = pSamplesOut[-3]; /* fallthrough */ |
4479 | case 2: tempC[1] = coefficients[1]; tempS[2] = pSamplesOut[-2]; /* fallthrough */ |
4480 | case 1: tempC[0] = coefficients[0]; tempS[3] = pSamplesOut[-1]; /* fallthrough */ |
4481 | } |
4482 | |
4483 | coefficients128_0 = vld1q_s32(tempC); |
4484 | samples128_0 = vld1q_s32(tempS); |
4485 | runningOrder = 0; |
4486 | } |
4487 | |
4488 | /* 4 - 7 */ |
4489 | if (runningOrder >= 4) { |
4490 | coefficients128_4 = vld1q_s32(coefficients + 4); |
4491 | samples128_4 = vld1q_s32(pSamplesOut - 8); |
4492 | runningOrder -= 4; |
4493 | } else { |
4494 | switch (runningOrder) { |
4495 | case 3: tempC[2] = coefficients[6]; tempS[1] = pSamplesOut[-7]; /* fallthrough */ |
4496 | case 2: tempC[1] = coefficients[5]; tempS[2] = pSamplesOut[-6]; /* fallthrough */ |
4497 | case 1: tempC[0] = coefficients[4]; tempS[3] = pSamplesOut[-5]; /* fallthrough */ |
4498 | } |
4499 | |
4500 | coefficients128_4 = vld1q_s32(tempC); |
4501 | samples128_4 = vld1q_s32(tempS); |
4502 | runningOrder = 0; |
4503 | } |
4504 | |
4505 | /* 8 - 11 */ |
4506 | if (runningOrder == 4) { |
4507 | coefficients128_8 = vld1q_s32(coefficients + 8); |
4508 | samples128_8 = vld1q_s32(pSamplesOut - 12); |
4509 | runningOrder -= 4; |
4510 | } else { |
4511 | switch (runningOrder) { |
4512 | case 3: tempC[2] = coefficients[10]; tempS[1] = pSamplesOut[-11]; /* fallthrough */ |
4513 | case 2: tempC[1] = coefficients[ 9]; tempS[2] = pSamplesOut[-10]; /* fallthrough */ |
4514 | case 1: tempC[0] = coefficients[ 8]; tempS[3] = pSamplesOut[- 9]; /* fallthrough */ |
4515 | } |
4516 | |
4517 | coefficients128_8 = vld1q_s32(tempC); |
4518 | samples128_8 = vld1q_s32(tempS); |
4519 | runningOrder = 0; |
4520 | } |
4521 | |
4522 | /* Coefficients need to be shuffled for our streaming algorithm below to work. Samples are already in the correct order from the loading routine above. */ |
4523 | coefficients128_0 = drflac__vrevq_s32(coefficients128_0); |
4524 | coefficients128_4 = drflac__vrevq_s32(coefficients128_4); |
4525 | coefficients128_8 = drflac__vrevq_s32(coefficients128_8); |
4526 | } |
4527 | |
4528 | /* For this version we are doing one sample at a time. */ |
4529 | while (pDecodedSamples < pDecodedSamplesEnd) { |
4530 | int32x4_t prediction128; |
4531 | int32x2_t prediction64; |
4532 | uint32x4_t zeroCountPart128; |
4533 | uint32x4_t riceParamPart128; |
4534 | |
4535 | if (!drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts[0], &riceParamParts[0]) || |
4536 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts[1], &riceParamParts[1]) || |
4537 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts[2], &riceParamParts[2]) || |
4538 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts[3], &riceParamParts[3])) { |
4539 | return DRFLAC_FALSE; |
4540 | } |
4541 | |
4542 | zeroCountPart128 = vld1q_u32(zeroCountParts); |
4543 | riceParamPart128 = vld1q_u32(riceParamParts); |
4544 | |
4545 | riceParamPart128 = vandq_u32(riceParamPart128, riceParamMask128); |
4546 | riceParamPart128 = vorrq_u32(riceParamPart128, vshlq_u32(zeroCountPart128, riceParam128)); |
4547 | riceParamPart128 = veorq_u32(vshrq_n_u32(riceParamPart128, 1), vaddq_u32(drflac__vnotq_u32(vandq_u32(riceParamPart128, one128)), one128)); |
4548 | |
4549 | if (order <= 4) { |
4550 | for (i = 0; i < 4; i += 1) { |
4551 | prediction128 = vmulq_s32(coefficients128_0, samples128_0); |
4552 | |
4553 | /* Horizontal add and shift. */ |
4554 | prediction64 = drflac__vhaddq_s32(prediction128); |
4555 | prediction64 = vshl_s32(prediction64, shift64); |
4556 | prediction64 = vadd_s32(prediction64, vget_low_s32(vreinterpretq_s32_u32(riceParamPart128))); |
4557 | |
4558 | samples128_0 = drflac__valignrq_s32_1(vcombine_s32(prediction64, vdup_n_s32(0)), samples128_0); |
4559 | riceParamPart128 = drflac__valignrq_u32_1(vdupq_n_u32(0), riceParamPart128); |
4560 | } |
4561 | } else if (order <= 8) { |
4562 | for (i = 0; i < 4; i += 1) { |
4563 | prediction128 = vmulq_s32(coefficients128_4, samples128_4); |
4564 | prediction128 = vmlaq_s32(prediction128, coefficients128_0, samples128_0); |
4565 | |
4566 | /* Horizontal add and shift. */ |
4567 | prediction64 = drflac__vhaddq_s32(prediction128); |
4568 | prediction64 = vshl_s32(prediction64, shift64); |
4569 | prediction64 = vadd_s32(prediction64, vget_low_s32(vreinterpretq_s32_u32(riceParamPart128))); |
4570 | |
4571 | samples128_4 = drflac__valignrq_s32_1(samples128_0, samples128_4); |
4572 | samples128_0 = drflac__valignrq_s32_1(vcombine_s32(prediction64, vdup_n_s32(0)), samples128_0); |
4573 | riceParamPart128 = drflac__valignrq_u32_1(vdupq_n_u32(0), riceParamPart128); |
4574 | } |
4575 | } else { |
4576 | for (i = 0; i < 4; i += 1) { |
4577 | prediction128 = vmulq_s32(coefficients128_8, samples128_8); |
4578 | prediction128 = vmlaq_s32(prediction128, coefficients128_4, samples128_4); |
4579 | prediction128 = vmlaq_s32(prediction128, coefficients128_0, samples128_0); |
4580 | |
4581 | /* Horizontal add and shift. */ |
4582 | prediction64 = drflac__vhaddq_s32(prediction128); |
4583 | prediction64 = vshl_s32(prediction64, shift64); |
4584 | prediction64 = vadd_s32(prediction64, vget_low_s32(vreinterpretq_s32_u32(riceParamPart128))); |
4585 | |
4586 | samples128_8 = drflac__valignrq_s32_1(samples128_4, samples128_8); |
4587 | samples128_4 = drflac__valignrq_s32_1(samples128_0, samples128_4); |
4588 | samples128_0 = drflac__valignrq_s32_1(vcombine_s32(prediction64, vdup_n_s32(0)), samples128_0); |
4589 | riceParamPart128 = drflac__valignrq_u32_1(vdupq_n_u32(0), riceParamPart128); |
4590 | } |
4591 | } |
4592 | |
4593 | /* We store samples in groups of 4. */ |
4594 | vst1q_s32(pDecodedSamples, samples128_0); |
4595 | pDecodedSamples += 4; |
4596 | } |
4597 | |
4598 | /* Make sure we process the last few samples. */ |
4599 | i = (count & ~3); |
4600 | while (i < (int)count) { |
4601 | /* Rice extraction. */ |
4602 | if (!drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts[0], &riceParamParts[0])) { |
4603 | return DRFLAC_FALSE; |
4604 | } |
4605 | |
4606 | /* Rice reconstruction. */ |
4607 | riceParamParts[0] &= riceParamMask; |
4608 | riceParamParts[0] |= (zeroCountParts[0] << riceParam); |
4609 | riceParamParts[0] = (riceParamParts[0] >> 1) ^ t[riceParamParts[0] & 0x01]; |
4610 | |
4611 | /* Sample reconstruction. */ |
4612 | pDecodedSamples[0] = riceParamParts[0] + drflac__calculate_prediction_32(order, shift, coefficients, pDecodedSamples); |
4613 | |
4614 | i += 1; |
4615 | pDecodedSamples += 1; |
4616 | } |
4617 | |
4618 | return DRFLAC_TRUE; |
4619 | } |
4620 | |
4621 | 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) |
4622 | { |
4623 | int i; |
4624 | drflac_uint32 riceParamMask; |
4625 | drflac_int32* pDecodedSamples = pSamplesOut; |
4626 | drflac_int32* pDecodedSamplesEnd = pSamplesOut + (count & ~3); |
4627 | drflac_uint32 zeroCountParts[4]; |
4628 | drflac_uint32 riceParamParts[4]; |
4629 | int32x4_t coefficients128_0; |
4630 | int32x4_t coefficients128_4; |
4631 | int32x4_t coefficients128_8; |
4632 | int32x4_t samples128_0; |
4633 | int32x4_t samples128_4; |
4634 | int32x4_t samples128_8; |
4635 | uint32x4_t riceParamMask128; |
4636 | int32x4_t riceParam128; |
4637 | int64x1_t shift64; |
4638 | uint32x4_t one128; |
9e052883 |
4639 | int64x2_t prediction128 = { 0 }; |
4640 | uint32x4_t zeroCountPart128; |
4641 | uint32x4_t riceParamPart128; |
2ff0b512 |
4642 | |
4643 | const drflac_uint32 t[2] = {0x00000000, 0xFFFFFFFF}; |
4644 | |
9e052883 |
4645 | riceParamMask = (drflac_uint32)~((~0UL) << riceParam); |
2ff0b512 |
4646 | riceParamMask128 = vdupq_n_u32(riceParamMask); |
4647 | |
4648 | riceParam128 = vdupq_n_s32(riceParam); |
4649 | shift64 = vdup_n_s64(-shift); /* Negate the shift because we'll be doing a variable shift using vshlq_s32(). */ |
4650 | one128 = vdupq_n_u32(1); |
4651 | |
4652 | /* |
4653 | Pre-loading the coefficients and prior samples is annoying because we need to ensure we don't try reading more than |
9e052883 |
4654 | what's available in the input buffers. It would be convenient to use a fall-through switch to do this, but this results |
2ff0b512 |
4655 | in strict aliasing warnings with GCC. To work around this I'm just doing something hacky. This feels a bit convoluted |
4656 | so I think there's opportunity for this to be simplified. |
4657 | */ |
4658 | { |
4659 | int runningOrder = order; |
4660 | drflac_int32 tempC[4] = {0, 0, 0, 0}; |
4661 | drflac_int32 tempS[4] = {0, 0, 0, 0}; |
4662 | |
4663 | /* 0 - 3. */ |
4664 | if (runningOrder >= 4) { |
4665 | coefficients128_0 = vld1q_s32(coefficients + 0); |
4666 | samples128_0 = vld1q_s32(pSamplesOut - 4); |
4667 | runningOrder -= 4; |
4668 | } else { |
4669 | switch (runningOrder) { |
4670 | case 3: tempC[2] = coefficients[2]; tempS[1] = pSamplesOut[-3]; /* fallthrough */ |
4671 | case 2: tempC[1] = coefficients[1]; tempS[2] = pSamplesOut[-2]; /* fallthrough */ |
4672 | case 1: tempC[0] = coefficients[0]; tempS[3] = pSamplesOut[-1]; /* fallthrough */ |
4673 | } |
4674 | |
4675 | coefficients128_0 = vld1q_s32(tempC); |
4676 | samples128_0 = vld1q_s32(tempS); |
4677 | runningOrder = 0; |
4678 | } |
4679 | |
4680 | /* 4 - 7 */ |
4681 | if (runningOrder >= 4) { |
4682 | coefficients128_4 = vld1q_s32(coefficients + 4); |
4683 | samples128_4 = vld1q_s32(pSamplesOut - 8); |
4684 | runningOrder -= 4; |
4685 | } else { |
4686 | switch (runningOrder) { |
4687 | case 3: tempC[2] = coefficients[6]; tempS[1] = pSamplesOut[-7]; /* fallthrough */ |
4688 | case 2: tempC[1] = coefficients[5]; tempS[2] = pSamplesOut[-6]; /* fallthrough */ |
4689 | case 1: tempC[0] = coefficients[4]; tempS[3] = pSamplesOut[-5]; /* fallthrough */ |
4690 | } |
4691 | |
4692 | coefficients128_4 = vld1q_s32(tempC); |
4693 | samples128_4 = vld1q_s32(tempS); |
4694 | runningOrder = 0; |
4695 | } |
4696 | |
4697 | /* 8 - 11 */ |
4698 | if (runningOrder == 4) { |
4699 | coefficients128_8 = vld1q_s32(coefficients + 8); |
4700 | samples128_8 = vld1q_s32(pSamplesOut - 12); |
4701 | runningOrder -= 4; |
4702 | } else { |
4703 | switch (runningOrder) { |
4704 | case 3: tempC[2] = coefficients[10]; tempS[1] = pSamplesOut[-11]; /* fallthrough */ |
4705 | case 2: tempC[1] = coefficients[ 9]; tempS[2] = pSamplesOut[-10]; /* fallthrough */ |
4706 | case 1: tempC[0] = coefficients[ 8]; tempS[3] = pSamplesOut[- 9]; /* fallthrough */ |
4707 | } |
4708 | |
4709 | coefficients128_8 = vld1q_s32(tempC); |
4710 | samples128_8 = vld1q_s32(tempS); |
4711 | runningOrder = 0; |
4712 | } |
4713 | |
4714 | /* Coefficients need to be shuffled for our streaming algorithm below to work. Samples are already in the correct order from the loading routine above. */ |
4715 | coefficients128_0 = drflac__vrevq_s32(coefficients128_0); |
4716 | coefficients128_4 = drflac__vrevq_s32(coefficients128_4); |
4717 | coefficients128_8 = drflac__vrevq_s32(coefficients128_8); |
4718 | } |
4719 | |
4720 | /* For this version we are doing one sample at a time. */ |
4721 | while (pDecodedSamples < pDecodedSamplesEnd) { |
2ff0b512 |
4722 | if (!drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts[0], &riceParamParts[0]) || |
4723 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts[1], &riceParamParts[1]) || |
4724 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts[2], &riceParamParts[2]) || |
4725 | !drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts[3], &riceParamParts[3])) { |
4726 | return DRFLAC_FALSE; |
4727 | } |
4728 | |
4729 | zeroCountPart128 = vld1q_u32(zeroCountParts); |
4730 | riceParamPart128 = vld1q_u32(riceParamParts); |
4731 | |
4732 | riceParamPart128 = vandq_u32(riceParamPart128, riceParamMask128); |
4733 | riceParamPart128 = vorrq_u32(riceParamPart128, vshlq_u32(zeroCountPart128, riceParam128)); |
4734 | riceParamPart128 = veorq_u32(vshrq_n_u32(riceParamPart128, 1), vaddq_u32(drflac__vnotq_u32(vandq_u32(riceParamPart128, one128)), one128)); |
4735 | |
4736 | for (i = 0; i < 4; i += 1) { |
4737 | int64x1_t prediction64; |
4738 | |
4739 | prediction128 = veorq_s64(prediction128, prediction128); /* Reset to 0. */ |
4740 | switch (order) |
4741 | { |
4742 | case 12: |
4743 | case 11: prediction128 = vaddq_s64(prediction128, vmull_s32(vget_low_s32(coefficients128_8), vget_low_s32(samples128_8))); |
4744 | case 10: |
4745 | case 9: prediction128 = vaddq_s64(prediction128, vmull_s32(vget_high_s32(coefficients128_8), vget_high_s32(samples128_8))); |
4746 | case 8: |
4747 | case 7: prediction128 = vaddq_s64(prediction128, vmull_s32(vget_low_s32(coefficients128_4), vget_low_s32(samples128_4))); |
4748 | case 6: |
4749 | case 5: prediction128 = vaddq_s64(prediction128, vmull_s32(vget_high_s32(coefficients128_4), vget_high_s32(samples128_4))); |
4750 | case 4: |
4751 | case 3: prediction128 = vaddq_s64(prediction128, vmull_s32(vget_low_s32(coefficients128_0), vget_low_s32(samples128_0))); |
4752 | case 2: |
4753 | case 1: prediction128 = vaddq_s64(prediction128, vmull_s32(vget_high_s32(coefficients128_0), vget_high_s32(samples128_0))); |
4754 | } |
4755 | |
4756 | /* Horizontal add and shift. */ |
4757 | prediction64 = drflac__vhaddq_s64(prediction128); |
4758 | prediction64 = vshl_s64(prediction64, shift64); |
4759 | prediction64 = vadd_s64(prediction64, vdup_n_s64(vgetq_lane_u32(riceParamPart128, 0))); |
4760 | |
4761 | /* Our value should be sitting in prediction64[0]. We need to combine this with our SSE samples. */ |
4762 | samples128_8 = drflac__valignrq_s32_1(samples128_4, samples128_8); |
4763 | samples128_4 = drflac__valignrq_s32_1(samples128_0, samples128_4); |
4764 | samples128_0 = drflac__valignrq_s32_1(vcombine_s32(vreinterpret_s32_s64(prediction64), vdup_n_s32(0)), samples128_0); |
4765 | |
4766 | /* Slide our rice parameter down so that the value in position 0 contains the next one to process. */ |
4767 | riceParamPart128 = drflac__valignrq_u32_1(vdupq_n_u32(0), riceParamPart128); |
4768 | } |
4769 | |
4770 | /* We store samples in groups of 4. */ |
4771 | vst1q_s32(pDecodedSamples, samples128_0); |
4772 | pDecodedSamples += 4; |
4773 | } |
4774 | |
4775 | /* Make sure we process the last few samples. */ |
4776 | i = (count & ~3); |
4777 | while (i < (int)count) { |
4778 | /* Rice extraction. */ |
4779 | if (!drflac__read_rice_parts_x1(bs, riceParam, &zeroCountParts[0], &riceParamParts[0])) { |
4780 | return DRFLAC_FALSE; |
4781 | } |
4782 | |
4783 | /* Rice reconstruction. */ |
4784 | riceParamParts[0] &= riceParamMask; |
4785 | riceParamParts[0] |= (zeroCountParts[0] << riceParam); |
4786 | riceParamParts[0] = (riceParamParts[0] >> 1) ^ t[riceParamParts[0] & 0x01]; |
4787 | |
4788 | /* Sample reconstruction. */ |
4789 | pDecodedSamples[0] = riceParamParts[0] + drflac__calculate_prediction_64(order, shift, coefficients, pDecodedSamples); |
4790 | |
4791 | i += 1; |
4792 | pDecodedSamples += 1; |
4793 | } |
4794 | |
4795 | return DRFLAC_TRUE; |
4796 | } |
4797 | |
9e052883 |
4798 | static drflac_bool32 drflac__decode_samples_with_residual__rice__neon(drflac_bs* bs, drflac_uint32 bitsPerSample, drflac_uint32 count, drflac_uint8 riceParam, drflac_uint32 lpcOrder, drflac_int32 lpcShift, drflac_uint32 lpcPrecision, const drflac_int32* coefficients, drflac_int32* pSamplesOut) |
2ff0b512 |
4799 | { |
4800 | DRFLAC_ASSERT(bs != NULL); |
2ff0b512 |
4801 | DRFLAC_ASSERT(pSamplesOut != NULL); |
4802 | |
4803 | /* 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. */ |
9e052883 |
4804 | if (lpcOrder > 0 && lpcOrder <= 12) { |
4805 | if (drflac__use_64_bit_prediction(bitsPerSample, lpcOrder, lpcPrecision)) { |
4806 | return drflac__decode_samples_with_residual__rice__neon_64(bs, count, riceParam, lpcOrder, lpcShift, coefficients, pSamplesOut); |
2ff0b512 |
4807 | } else { |
9e052883 |
4808 | return drflac__decode_samples_with_residual__rice__neon_32(bs, count, riceParam, lpcOrder, lpcShift, coefficients, pSamplesOut); |
2ff0b512 |
4809 | } |
4810 | } else { |
9e052883 |
4811 | return drflac__decode_samples_with_residual__rice__scalar(bs, bitsPerSample, count, riceParam, lpcOrder, lpcShift, lpcPrecision, coefficients, pSamplesOut); |
2ff0b512 |
4812 | } |
4813 | } |
4814 | #endif |
4815 | |
9e052883 |
4816 | static drflac_bool32 drflac__decode_samples_with_residual__rice(drflac_bs* bs, drflac_uint32 bitsPerSample, drflac_uint32 count, drflac_uint8 riceParam, drflac_uint32 lpcOrder, drflac_int32 lpcShift, drflac_uint32 lpcPrecision, const drflac_int32* coefficients, drflac_int32* pSamplesOut) |
2ff0b512 |
4817 | { |
4818 | #if defined(DRFLAC_SUPPORT_SSE41) |
4819 | if (drflac__gIsSSE41Supported) { |
9e052883 |
4820 | return drflac__decode_samples_with_residual__rice__sse41(bs, bitsPerSample, count, riceParam, lpcOrder, lpcShift, lpcPrecision, coefficients, pSamplesOut); |
2ff0b512 |
4821 | } else |
4822 | #elif defined(DRFLAC_SUPPORT_NEON) |
4823 | if (drflac__gIsNEONSupported) { |
9e052883 |
4824 | return drflac__decode_samples_with_residual__rice__neon(bs, bitsPerSample, count, riceParam, lpcOrder, lpcShift, lpcPrecision, coefficients, pSamplesOut); |
2ff0b512 |
4825 | } else |
4826 | #endif |
4827 | { |
4828 | /* Scalar fallback. */ |
9e052883 |
4829 | #if 0 |
4830 | return drflac__decode_samples_with_residual__rice__reference(bs, bitsPerSample, count, riceParam, lpcOrder, lpcShift, lpcPrecision, coefficients, pSamplesOut); |
4831 | #else |
4832 | return drflac__decode_samples_with_residual__rice__scalar(bs, bitsPerSample, count, riceParam, lpcOrder, lpcShift, lpcPrecision, coefficients, pSamplesOut); |
4833 | #endif |
2ff0b512 |
4834 | } |
4835 | } |
4836 | |
4837 | /* 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. */ |
4838 | static drflac_bool32 drflac__read_and_seek_residual__rice(drflac_bs* bs, drflac_uint32 count, drflac_uint8 riceParam) |
4839 | { |
4840 | drflac_uint32 i; |
4841 | |
4842 | DRFLAC_ASSERT(bs != NULL); |
2ff0b512 |
4843 | |
4844 | for (i = 0; i < count; ++i) { |
4845 | if (!drflac__seek_rice_parts(bs, riceParam)) { |
4846 | return DRFLAC_FALSE; |
4847 | } |
4848 | } |
4849 | |
4850 | return DRFLAC_TRUE; |
4851 | } |
4852 | |
9e052883 |
4853 | #if defined(__clang__) |
4854 | __attribute__((no_sanitize("signed-integer-overflow"))) |
4855 | #endif |
4856 | static drflac_bool32 drflac__decode_samples_with_residual__unencoded(drflac_bs* bs, drflac_uint32 bitsPerSample, drflac_uint32 count, drflac_uint8 unencodedBitsPerSample, drflac_uint32 lpcOrder, drflac_int32 lpcShift, drflac_uint32 lpcPrecision, const drflac_int32* coefficients, drflac_int32* pSamplesOut) |
2ff0b512 |
4857 | { |
4858 | drflac_uint32 i; |
4859 | |
4860 | DRFLAC_ASSERT(bs != NULL); |
2ff0b512 |
4861 | DRFLAC_ASSERT(unencodedBitsPerSample <= 31); /* <-- unencodedBitsPerSample is a 5 bit number, so cannot exceed 31. */ |
4862 | DRFLAC_ASSERT(pSamplesOut != NULL); |
4863 | |
4864 | for (i = 0; i < count; ++i) { |
4865 | if (unencodedBitsPerSample > 0) { |
4866 | if (!drflac__read_int32(bs, unencodedBitsPerSample, pSamplesOut + i)) { |
4867 | return DRFLAC_FALSE; |
4868 | } |
4869 | } else { |
4870 | pSamplesOut[i] = 0; |
4871 | } |
4872 | |
9e052883 |
4873 | if (drflac__use_64_bit_prediction(bitsPerSample, lpcOrder, lpcPrecision)) { |
4874 | pSamplesOut[i] += drflac__calculate_prediction_64(lpcOrder, lpcShift, coefficients, pSamplesOut + i); |
2ff0b512 |
4875 | } else { |
9e052883 |
4876 | pSamplesOut[i] += drflac__calculate_prediction_32(lpcOrder, lpcShift, coefficients, pSamplesOut + i); |
2ff0b512 |
4877 | } |
4878 | } |
4879 | |
4880 | return DRFLAC_TRUE; |
4881 | } |
4882 | |
4883 | |
4884 | /* |
4885 | Reads and decodes the residual for the sub-frame the decoder is currently sitting on. This function should be called |
4886 | when the decoder is sitting at the very start of the RESIDUAL block. The first <order> residuals will be ignored. The |
4887 | <blockSize> and <order> parameters are used to determine how many residual values need to be decoded. |
4888 | */ |
9e052883 |
4889 | static drflac_bool32 drflac__decode_samples_with_residual(drflac_bs* bs, drflac_uint32 bitsPerSample, drflac_uint32 blockSize, drflac_uint32 lpcOrder, drflac_int32 lpcShift, drflac_uint32 lpcPrecision, const drflac_int32* coefficients, drflac_int32* pDecodedSamples) |
2ff0b512 |
4890 | { |
4891 | drflac_uint8 residualMethod; |
4892 | drflac_uint8 partitionOrder; |
4893 | drflac_uint32 samplesInPartition; |
4894 | drflac_uint32 partitionsRemaining; |
4895 | |
4896 | DRFLAC_ASSERT(bs != NULL); |
4897 | DRFLAC_ASSERT(blockSize != 0); |
4898 | DRFLAC_ASSERT(pDecodedSamples != NULL); /* <-- Should we allow NULL, in which case we just seek past the residual rather than do a full decode? */ |
4899 | |
4900 | if (!drflac__read_uint8(bs, 2, &residualMethod)) { |
4901 | return DRFLAC_FALSE; |
4902 | } |
4903 | |
4904 | if (residualMethod != DRFLAC_RESIDUAL_CODING_METHOD_PARTITIONED_RICE && residualMethod != DRFLAC_RESIDUAL_CODING_METHOD_PARTITIONED_RICE2) { |
4905 | return DRFLAC_FALSE; /* Unknown or unsupported residual coding method. */ |
4906 | } |
4907 | |
4908 | /* Ignore the first <order> values. */ |
9e052883 |
4909 | pDecodedSamples += lpcOrder; |
2ff0b512 |
4910 | |
4911 | if (!drflac__read_uint8(bs, 4, &partitionOrder)) { |
4912 | return DRFLAC_FALSE; |
4913 | } |
4914 | |
4915 | /* |
4916 | From the FLAC spec: |
4917 | The Rice partition order in a Rice-coded residual section must be less than or equal to 8. |
4918 | */ |
4919 | if (partitionOrder > 8) { |
4920 | return DRFLAC_FALSE; |
4921 | } |
4922 | |
4923 | /* Validation check. */ |
9e052883 |
4924 | if ((blockSize / (1 << partitionOrder)) < lpcOrder) { |
2ff0b512 |
4925 | return DRFLAC_FALSE; |
4926 | } |
4927 | |
9e052883 |
4928 | samplesInPartition = (blockSize / (1 << partitionOrder)) - lpcOrder; |
2ff0b512 |
4929 | partitionsRemaining = (1 << partitionOrder); |
4930 | for (;;) { |
4931 | drflac_uint8 riceParam = 0; |
4932 | if (residualMethod == DRFLAC_RESIDUAL_CODING_METHOD_PARTITIONED_RICE) { |
4933 | if (!drflac__read_uint8(bs, 4, &riceParam)) { |
4934 | return DRFLAC_FALSE; |
4935 | } |
4936 | if (riceParam == 15) { |
4937 | riceParam = 0xFF; |
4938 | } |
4939 | } else if (residualMethod == DRFLAC_RESIDUAL_CODING_METHOD_PARTITIONED_RICE2) { |
4940 | if (!drflac__read_uint8(bs, 5, &riceParam)) { |
4941 | return DRFLAC_FALSE; |
4942 | } |
4943 | if (riceParam == 31) { |
4944 | riceParam = 0xFF; |
4945 | } |
4946 | } |
4947 | |
4948 | if (riceParam != 0xFF) { |
9e052883 |
4949 | if (!drflac__decode_samples_with_residual__rice(bs, bitsPerSample, samplesInPartition, riceParam, lpcOrder, lpcShift, lpcPrecision, coefficients, pDecodedSamples)) { |
2ff0b512 |
4950 | return DRFLAC_FALSE; |
4951 | } |
4952 | } else { |
4953 | drflac_uint8 unencodedBitsPerSample = 0; |
4954 | if (!drflac__read_uint8(bs, 5, &unencodedBitsPerSample)) { |
4955 | return DRFLAC_FALSE; |
4956 | } |
4957 | |
9e052883 |
4958 | if (!drflac__decode_samples_with_residual__unencoded(bs, bitsPerSample, samplesInPartition, unencodedBitsPerSample, lpcOrder, lpcShift, lpcPrecision, coefficients, pDecodedSamples)) { |
2ff0b512 |
4959 | return DRFLAC_FALSE; |
4960 | } |
4961 | } |
4962 | |
4963 | pDecodedSamples += samplesInPartition; |
4964 | |
4965 | if (partitionsRemaining == 1) { |
4966 | break; |
4967 | } |
4968 | |
4969 | partitionsRemaining -= 1; |
4970 | |
4971 | if (partitionOrder != 0) { |
4972 | samplesInPartition = blockSize / (1 << partitionOrder); |
4973 | } |
4974 | } |
4975 | |
4976 | return DRFLAC_TRUE; |
4977 | } |
4978 | |
4979 | /* |
4980 | Reads and seeks past the residual for the sub-frame the decoder is currently sitting on. This function should be called |
4981 | when the decoder is sitting at the very start of the RESIDUAL block. The first <order> residuals will be set to 0. The |
4982 | <blockSize> and <order> parameters are used to determine how many residual values need to be decoded. |
4983 | */ |
4984 | static drflac_bool32 drflac__read_and_seek_residual(drflac_bs* bs, drflac_uint32 blockSize, drflac_uint32 order) |
4985 | { |
4986 | drflac_uint8 residualMethod; |
4987 | drflac_uint8 partitionOrder; |
4988 | drflac_uint32 samplesInPartition; |
4989 | drflac_uint32 partitionsRemaining; |
4990 | |
4991 | DRFLAC_ASSERT(bs != NULL); |
4992 | DRFLAC_ASSERT(blockSize != 0); |
4993 | |
4994 | if (!drflac__read_uint8(bs, 2, &residualMethod)) { |
4995 | return DRFLAC_FALSE; |
4996 | } |
4997 | |
4998 | if (residualMethod != DRFLAC_RESIDUAL_CODING_METHOD_PARTITIONED_RICE && residualMethod != DRFLAC_RESIDUAL_CODING_METHOD_PARTITIONED_RICE2) { |
4999 | return DRFLAC_FALSE; /* Unknown or unsupported residual coding method. */ |
5000 | } |
5001 | |
5002 | if (!drflac__read_uint8(bs, 4, &partitionOrder)) { |
5003 | return DRFLAC_FALSE; |
5004 | } |
5005 | |
5006 | /* |
5007 | From the FLAC spec: |
5008 | The Rice partition order in a Rice-coded residual section must be less than or equal to 8. |
5009 | */ |
5010 | if (partitionOrder > 8) { |
5011 | return DRFLAC_FALSE; |
5012 | } |
5013 | |
5014 | /* Validation check. */ |
5015 | if ((blockSize / (1 << partitionOrder)) <= order) { |
5016 | return DRFLAC_FALSE; |
5017 | } |
5018 | |
5019 | samplesInPartition = (blockSize / (1 << partitionOrder)) - order; |
5020 | partitionsRemaining = (1 << partitionOrder); |
5021 | for (;;) |
5022 | { |
5023 | drflac_uint8 riceParam = 0; |
5024 | if (residualMethod == DRFLAC_RESIDUAL_CODING_METHOD_PARTITIONED_RICE) { |
5025 | if (!drflac__read_uint8(bs, 4, &riceParam)) { |
5026 | return DRFLAC_FALSE; |
5027 | } |
5028 | if (riceParam == 15) { |
5029 | riceParam = 0xFF; |
5030 | } |
5031 | } else if (residualMethod == DRFLAC_RESIDUAL_CODING_METHOD_PARTITIONED_RICE2) { |
5032 | if (!drflac__read_uint8(bs, 5, &riceParam)) { |
5033 | return DRFLAC_FALSE; |
5034 | } |
5035 | if (riceParam == 31) { |
5036 | riceParam = 0xFF; |
5037 | } |
5038 | } |
5039 | |
5040 | if (riceParam != 0xFF) { |
5041 | if (!drflac__read_and_seek_residual__rice(bs, samplesInPartition, riceParam)) { |
5042 | return DRFLAC_FALSE; |
5043 | } |
5044 | } else { |
5045 | drflac_uint8 unencodedBitsPerSample = 0; |
5046 | if (!drflac__read_uint8(bs, 5, &unencodedBitsPerSample)) { |
5047 | return DRFLAC_FALSE; |
5048 | } |
5049 | |
5050 | if (!drflac__seek_bits(bs, unencodedBitsPerSample * samplesInPartition)) { |
5051 | return DRFLAC_FALSE; |
5052 | } |
5053 | } |
5054 | |
5055 | |
5056 | if (partitionsRemaining == 1) { |
5057 | break; |
5058 | } |
5059 | |
5060 | partitionsRemaining -= 1; |
5061 | samplesInPartition = blockSize / (1 << partitionOrder); |
5062 | } |
5063 | |
5064 | return DRFLAC_TRUE; |
5065 | } |
5066 | |
5067 | |
5068 | static drflac_bool32 drflac__decode_samples__constant(drflac_bs* bs, drflac_uint32 blockSize, drflac_uint32 subframeBitsPerSample, drflac_int32* pDecodedSamples) |
5069 | { |
5070 | drflac_uint32 i; |
5071 | |
5072 | /* Only a single sample needs to be decoded here. */ |
5073 | drflac_int32 sample; |
5074 | if (!drflac__read_int32(bs, subframeBitsPerSample, &sample)) { |
5075 | return DRFLAC_FALSE; |
5076 | } |
5077 | |
5078 | /* |
5079 | We don't really need to expand this, but it does simplify the process of reading samples. If this becomes a performance issue (unlikely) |
5080 | we'll want to look at a more efficient way. |
5081 | */ |
5082 | for (i = 0; i < blockSize; ++i) { |
5083 | pDecodedSamples[i] = sample; |
5084 | } |
5085 | |
5086 | return DRFLAC_TRUE; |
5087 | } |
5088 | |
5089 | static drflac_bool32 drflac__decode_samples__verbatim(drflac_bs* bs, drflac_uint32 blockSize, drflac_uint32 subframeBitsPerSample, drflac_int32* pDecodedSamples) |
5090 | { |
5091 | drflac_uint32 i; |
5092 | |
5093 | for (i = 0; i < blockSize; ++i) { |
5094 | drflac_int32 sample; |
5095 | if (!drflac__read_int32(bs, subframeBitsPerSample, &sample)) { |
5096 | return DRFLAC_FALSE; |
5097 | } |
5098 | |
5099 | pDecodedSamples[i] = sample; |
5100 | } |
5101 | |
5102 | return DRFLAC_TRUE; |
5103 | } |
5104 | |
5105 | static drflac_bool32 drflac__decode_samples__fixed(drflac_bs* bs, drflac_uint32 blockSize, drflac_uint32 subframeBitsPerSample, drflac_uint8 lpcOrder, drflac_int32* pDecodedSamples) |
5106 | { |
5107 | drflac_uint32 i; |
5108 | |
5109 | static drflac_int32 lpcCoefficientsTable[5][4] = { |
5110 | {0, 0, 0, 0}, |
5111 | {1, 0, 0, 0}, |
5112 | {2, -1, 0, 0}, |
5113 | {3, -3, 1, 0}, |
5114 | {4, -6, 4, -1} |
5115 | }; |
5116 | |
5117 | /* Warm up samples and coefficients. */ |
5118 | for (i = 0; i < lpcOrder; ++i) { |
5119 | drflac_int32 sample; |
5120 | if (!drflac__read_int32(bs, subframeBitsPerSample, &sample)) { |
5121 | return DRFLAC_FALSE; |
5122 | } |
5123 | |
5124 | pDecodedSamples[i] = sample; |
5125 | } |
5126 | |
9e052883 |
5127 | if (!drflac__decode_samples_with_residual(bs, subframeBitsPerSample, blockSize, lpcOrder, 0, 4, lpcCoefficientsTable[lpcOrder], pDecodedSamples)) { |
2ff0b512 |
5128 | return DRFLAC_FALSE; |
5129 | } |
5130 | |
5131 | return DRFLAC_TRUE; |
5132 | } |
5133 | |
5134 | static drflac_bool32 drflac__decode_samples__lpc(drflac_bs* bs, drflac_uint32 blockSize, drflac_uint32 bitsPerSample, drflac_uint8 lpcOrder, drflac_int32* pDecodedSamples) |
5135 | { |
5136 | drflac_uint8 i; |
5137 | drflac_uint8 lpcPrecision; |
5138 | drflac_int8 lpcShift; |
5139 | drflac_int32 coefficients[32]; |
5140 | |
5141 | /* Warm up samples. */ |
5142 | for (i = 0; i < lpcOrder; ++i) { |
5143 | drflac_int32 sample; |
5144 | if (!drflac__read_int32(bs, bitsPerSample, &sample)) { |
5145 | return DRFLAC_FALSE; |
5146 | } |
5147 | |
5148 | pDecodedSamples[i] = sample; |
5149 | } |
5150 | |
5151 | if (!drflac__read_uint8(bs, 4, &lpcPrecision)) { |
5152 | return DRFLAC_FALSE; |
5153 | } |
5154 | if (lpcPrecision == 15) { |
5155 | return DRFLAC_FALSE; /* Invalid. */ |
5156 | } |
5157 | lpcPrecision += 1; |
5158 | |
5159 | if (!drflac__read_int8(bs, 5, &lpcShift)) { |
5160 | return DRFLAC_FALSE; |
5161 | } |
5162 | |
5163 | /* |
5164 | From the FLAC specification: |
5165 | |
5166 | Quantized linear predictor coefficient shift needed in bits (NOTE: this number is signed two's-complement) |
5167 | |
5168 | 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 |
5169 | 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. |
5170 | */ |
5171 | if (lpcShift < 0) { |
5172 | return DRFLAC_FALSE; |
5173 | } |
5174 | |
5175 | DRFLAC_ZERO_MEMORY(coefficients, sizeof(coefficients)); |
5176 | for (i = 0; i < lpcOrder; ++i) { |
5177 | if (!drflac__read_int32(bs, lpcPrecision, coefficients + i)) { |
5178 | return DRFLAC_FALSE; |
5179 | } |
5180 | } |
5181 | |
9e052883 |
5182 | if (!drflac__decode_samples_with_residual(bs, bitsPerSample, blockSize, lpcOrder, lpcShift, lpcPrecision, coefficients, pDecodedSamples)) { |
2ff0b512 |
5183 | return DRFLAC_FALSE; |
5184 | } |
5185 | |
5186 | return DRFLAC_TRUE; |
5187 | } |
5188 | |
5189 | |
5190 | static drflac_bool32 drflac__read_next_flac_frame_header(drflac_bs* bs, drflac_uint8 streaminfoBitsPerSample, drflac_frame_header* header) |
5191 | { |
5192 | const drflac_uint32 sampleRateTable[12] = {0, 88200, 176400, 192000, 8000, 16000, 22050, 24000, 32000, 44100, 48000, 96000}; |
5193 | const drflac_uint8 bitsPerSampleTable[8] = {0, 8, 12, (drflac_uint8)-1, 16, 20, 24, (drflac_uint8)-1}; /* -1 = reserved. */ |
5194 | |
5195 | DRFLAC_ASSERT(bs != NULL); |
5196 | DRFLAC_ASSERT(header != NULL); |
5197 | |
5198 | /* Keep looping until we find a valid sync code. */ |
5199 | for (;;) { |
5200 | drflac_uint8 crc8 = 0xCE; /* 0xCE = drflac_crc8(0, 0x3FFE, 14); */ |
5201 | drflac_uint8 reserved = 0; |
5202 | drflac_uint8 blockingStrategy = 0; |
5203 | drflac_uint8 blockSize = 0; |
5204 | drflac_uint8 sampleRate = 0; |
5205 | drflac_uint8 channelAssignment = 0; |
5206 | drflac_uint8 bitsPerSample = 0; |
5207 | drflac_bool32 isVariableBlockSize; |
5208 | |
5209 | if (!drflac__find_and_seek_to_next_sync_code(bs)) { |
5210 | return DRFLAC_FALSE; |
5211 | } |
5212 | |
5213 | if (!drflac__read_uint8(bs, 1, &reserved)) { |
5214 | return DRFLAC_FALSE; |
5215 | } |
5216 | if (reserved == 1) { |
5217 | continue; |
5218 | } |
5219 | crc8 = drflac_crc8(crc8, reserved, 1); |
5220 | |
5221 | if (!drflac__read_uint8(bs, 1, &blockingStrategy)) { |
5222 | return DRFLAC_FALSE; |
5223 | } |
5224 | crc8 = drflac_crc8(crc8, blockingStrategy, 1); |
5225 | |
5226 | if (!drflac__read_uint8(bs, 4, &blockSize)) { |
5227 | return DRFLAC_FALSE; |
5228 | } |
5229 | if (blockSize == 0) { |
5230 | continue; |
5231 | } |
5232 | crc8 = drflac_crc8(crc8, blockSize, 4); |
5233 | |
5234 | if (!drflac__read_uint8(bs, 4, &sampleRate)) { |
5235 | return DRFLAC_FALSE; |
5236 | } |
5237 | crc8 = drflac_crc8(crc8, sampleRate, 4); |
5238 | |
5239 | if (!drflac__read_uint8(bs, 4, &channelAssignment)) { |
5240 | return DRFLAC_FALSE; |
5241 | } |
5242 | if (channelAssignment > 10) { |
5243 | continue; |
5244 | } |
5245 | crc8 = drflac_crc8(crc8, channelAssignment, 4); |
5246 | |
5247 | if (!drflac__read_uint8(bs, 3, &bitsPerSample)) { |
5248 | return DRFLAC_FALSE; |
5249 | } |
5250 | if (bitsPerSample == 3 || bitsPerSample == 7) { |
5251 | continue; |
5252 | } |
5253 | crc8 = drflac_crc8(crc8, bitsPerSample, 3); |
5254 | |
5255 | |
5256 | if (!drflac__read_uint8(bs, 1, &reserved)) { |
5257 | return DRFLAC_FALSE; |
5258 | } |
5259 | if (reserved == 1) { |
5260 | continue; |
5261 | } |
5262 | crc8 = drflac_crc8(crc8, reserved, 1); |
5263 | |
5264 | |
5265 | isVariableBlockSize = blockingStrategy == 1; |
5266 | if (isVariableBlockSize) { |
5267 | drflac_uint64 pcmFrameNumber; |
5268 | drflac_result result = drflac__read_utf8_coded_number(bs, &pcmFrameNumber, &crc8); |
5269 | if (result != DRFLAC_SUCCESS) { |
5270 | if (result == DRFLAC_AT_END) { |
5271 | return DRFLAC_FALSE; |
5272 | } else { |
5273 | continue; |
5274 | } |
5275 | } |
5276 | header->flacFrameNumber = 0; |
5277 | header->pcmFrameNumber = pcmFrameNumber; |
5278 | } else { |
5279 | drflac_uint64 flacFrameNumber = 0; |
5280 | drflac_result result = drflac__read_utf8_coded_number(bs, &flacFrameNumber, &crc8); |
5281 | if (result != DRFLAC_SUCCESS) { |
5282 | if (result == DRFLAC_AT_END) { |
5283 | return DRFLAC_FALSE; |
5284 | } else { |
5285 | continue; |
5286 | } |
5287 | } |
5288 | header->flacFrameNumber = (drflac_uint32)flacFrameNumber; /* <-- Safe cast. */ |
5289 | header->pcmFrameNumber = 0; |
5290 | } |
5291 | |
5292 | |
5293 | DRFLAC_ASSERT(blockSize > 0); |
5294 | if (blockSize == 1) { |
5295 | header->blockSizeInPCMFrames = 192; |
5296 | } else if (blockSize <= 5) { |
5297 | DRFLAC_ASSERT(blockSize >= 2); |
5298 | header->blockSizeInPCMFrames = 576 * (1 << (blockSize - 2)); |
5299 | } else if (blockSize == 6) { |
5300 | if (!drflac__read_uint16(bs, 8, &header->blockSizeInPCMFrames)) { |
5301 | return DRFLAC_FALSE; |
5302 | } |
5303 | crc8 = drflac_crc8(crc8, header->blockSizeInPCMFrames, 8); |
5304 | header->blockSizeInPCMFrames += 1; |
5305 | } else if (blockSize == 7) { |
5306 | if (!drflac__read_uint16(bs, 16, &header->blockSizeInPCMFrames)) { |
5307 | return DRFLAC_FALSE; |
5308 | } |
5309 | crc8 = drflac_crc8(crc8, header->blockSizeInPCMFrames, 16); |
9e052883 |
5310 | if (header->blockSizeInPCMFrames == 0xFFFF) { |
5311 | return DRFLAC_FALSE; /* Frame is too big. This is the size of the frame minus 1. The STREAMINFO block defines the max block size which is 16-bits. Adding one will make it 17 bits and therefore too big. */ |
5312 | } |
2ff0b512 |
5313 | header->blockSizeInPCMFrames += 1; |
5314 | } else { |
5315 | DRFLAC_ASSERT(blockSize >= 8); |
5316 | header->blockSizeInPCMFrames = 256 * (1 << (blockSize - 8)); |
5317 | } |
5318 | |
5319 | |
5320 | if (sampleRate <= 11) { |
5321 | header->sampleRate = sampleRateTable[sampleRate]; |
5322 | } else if (sampleRate == 12) { |
5323 | if (!drflac__read_uint32(bs, 8, &header->sampleRate)) { |
5324 | return DRFLAC_FALSE; |
5325 | } |
5326 | crc8 = drflac_crc8(crc8, header->sampleRate, 8); |
5327 | header->sampleRate *= 1000; |
5328 | } else if (sampleRate == 13) { |
5329 | if (!drflac__read_uint32(bs, 16, &header->sampleRate)) { |
5330 | return DRFLAC_FALSE; |
5331 | } |
5332 | crc8 = drflac_crc8(crc8, header->sampleRate, 16); |
5333 | } else if (sampleRate == 14) { |
5334 | if (!drflac__read_uint32(bs, 16, &header->sampleRate)) { |
5335 | return DRFLAC_FALSE; |
5336 | } |
5337 | crc8 = drflac_crc8(crc8, header->sampleRate, 16); |
5338 | header->sampleRate *= 10; |
5339 | } else { |
5340 | continue; /* Invalid. Assume an invalid block. */ |
5341 | } |
5342 | |
5343 | |
5344 | header->channelAssignment = channelAssignment; |
5345 | |
5346 | header->bitsPerSample = bitsPerSampleTable[bitsPerSample]; |
5347 | if (header->bitsPerSample == 0) { |
5348 | header->bitsPerSample = streaminfoBitsPerSample; |
5349 | } |
5350 | |
9e052883 |
5351 | if (header->bitsPerSample != streaminfoBitsPerSample) { |
5352 | /* If this subframe has a different bitsPerSample then streaminfo or the first frame, reject it */ |
5353 | return DRFLAC_FALSE; |
5354 | } |
5355 | |
2ff0b512 |
5356 | if (!drflac__read_uint8(bs, 8, &header->crc8)) { |
5357 | return DRFLAC_FALSE; |
5358 | } |
5359 | |
5360 | #ifndef DR_FLAC_NO_CRC |
5361 | if (header->crc8 != crc8) { |
5362 | continue; /* CRC mismatch. Loop back to the top and find the next sync code. */ |
5363 | } |
5364 | #endif |
5365 | return DRFLAC_TRUE; |
5366 | } |
5367 | } |
5368 | |
5369 | static drflac_bool32 drflac__read_subframe_header(drflac_bs* bs, drflac_subframe* pSubframe) |
5370 | { |
5371 | drflac_uint8 header; |
5372 | int type; |
5373 | |
5374 | if (!drflac__read_uint8(bs, 8, &header)) { |
5375 | return DRFLAC_FALSE; |
5376 | } |
5377 | |
5378 | /* First bit should always be 0. */ |
5379 | if ((header & 0x80) != 0) { |
5380 | return DRFLAC_FALSE; |
5381 | } |
5382 | |
5383 | type = (header & 0x7E) >> 1; |
5384 | if (type == 0) { |
5385 | pSubframe->subframeType = DRFLAC_SUBFRAME_CONSTANT; |
5386 | } else if (type == 1) { |
5387 | pSubframe->subframeType = DRFLAC_SUBFRAME_VERBATIM; |
5388 | } else { |
5389 | if ((type & 0x20) != 0) { |
5390 | pSubframe->subframeType = DRFLAC_SUBFRAME_LPC; |
5391 | pSubframe->lpcOrder = (drflac_uint8)(type & 0x1F) + 1; |
5392 | } else if ((type & 0x08) != 0) { |
5393 | pSubframe->subframeType = DRFLAC_SUBFRAME_FIXED; |
5394 | pSubframe->lpcOrder = (drflac_uint8)(type & 0x07); |
5395 | if (pSubframe->lpcOrder > 4) { |
5396 | pSubframe->subframeType = DRFLAC_SUBFRAME_RESERVED; |
5397 | pSubframe->lpcOrder = 0; |
5398 | } |
5399 | } else { |
5400 | pSubframe->subframeType = DRFLAC_SUBFRAME_RESERVED; |
5401 | } |
5402 | } |
5403 | |
5404 | if (pSubframe->subframeType == DRFLAC_SUBFRAME_RESERVED) { |
5405 | return DRFLAC_FALSE; |
5406 | } |
5407 | |
5408 | /* Wasted bits per sample. */ |
5409 | pSubframe->wastedBitsPerSample = 0; |
5410 | if ((header & 0x01) == 1) { |
5411 | unsigned int wastedBitsPerSample; |
5412 | if (!drflac__seek_past_next_set_bit(bs, &wastedBitsPerSample)) { |
5413 | return DRFLAC_FALSE; |
5414 | } |
5415 | pSubframe->wastedBitsPerSample = (drflac_uint8)wastedBitsPerSample + 1; |
5416 | } |
5417 | |
5418 | return DRFLAC_TRUE; |
5419 | } |
5420 | |
5421 | static drflac_bool32 drflac__decode_subframe(drflac_bs* bs, drflac_frame* frame, int subframeIndex, drflac_int32* pDecodedSamplesOut) |
5422 | { |
5423 | drflac_subframe* pSubframe; |
5424 | drflac_uint32 subframeBitsPerSample; |
5425 | |
5426 | DRFLAC_ASSERT(bs != NULL); |
5427 | DRFLAC_ASSERT(frame != NULL); |
5428 | |
5429 | pSubframe = frame->subframes + subframeIndex; |
5430 | if (!drflac__read_subframe_header(bs, pSubframe)) { |
5431 | return DRFLAC_FALSE; |
5432 | } |
5433 | |
5434 | /* Side channels require an extra bit per sample. Took a while to figure that one out... */ |
5435 | subframeBitsPerSample = frame->header.bitsPerSample; |
5436 | if ((frame->header.channelAssignment == DRFLAC_CHANNEL_ASSIGNMENT_LEFT_SIDE || frame->header.channelAssignment == DRFLAC_CHANNEL_ASSIGNMENT_MID_SIDE) && subframeIndex == 1) { |
5437 | subframeBitsPerSample += 1; |
5438 | } else if (frame->header.channelAssignment == DRFLAC_CHANNEL_ASSIGNMENT_RIGHT_SIDE && subframeIndex == 0) { |
5439 | subframeBitsPerSample += 1; |
5440 | } |
5441 | |
9e052883 |
5442 | if (subframeBitsPerSample > 32) { |
5443 | /* libFLAC and ffmpeg reject 33-bit subframes as well */ |
5444 | return DRFLAC_FALSE; |
5445 | } |
5446 | |
2ff0b512 |
5447 | /* Need to handle wasted bits per sample. */ |
5448 | if (pSubframe->wastedBitsPerSample >= subframeBitsPerSample) { |
5449 | return DRFLAC_FALSE; |
5450 | } |
5451 | subframeBitsPerSample -= pSubframe->wastedBitsPerSample; |
5452 | |
5453 | pSubframe->pSamplesS32 = pDecodedSamplesOut; |
5454 | |
5455 | switch (pSubframe->subframeType) |
5456 | { |
5457 | case DRFLAC_SUBFRAME_CONSTANT: |
5458 | { |
5459 | drflac__decode_samples__constant(bs, frame->header.blockSizeInPCMFrames, subframeBitsPerSample, pSubframe->pSamplesS32); |
5460 | } break; |
5461 | |
5462 | case DRFLAC_SUBFRAME_VERBATIM: |
5463 | { |
5464 | drflac__decode_samples__verbatim(bs, frame->header.blockSizeInPCMFrames, subframeBitsPerSample, pSubframe->pSamplesS32); |
5465 | } break; |
5466 | |
5467 | case DRFLAC_SUBFRAME_FIXED: |
5468 | { |
5469 | drflac__decode_samples__fixed(bs, frame->header.blockSizeInPCMFrames, subframeBitsPerSample, pSubframe->lpcOrder, pSubframe->pSamplesS32); |
5470 | } break; |
5471 | |
5472 | case DRFLAC_SUBFRAME_LPC: |
5473 | { |
5474 | drflac__decode_samples__lpc(bs, frame->header.blockSizeInPCMFrames, subframeBitsPerSample, pSubframe->lpcOrder, pSubframe->pSamplesS32); |
5475 | } break; |
5476 | |
5477 | default: return DRFLAC_FALSE; |
5478 | } |
5479 | |
5480 | return DRFLAC_TRUE; |
5481 | } |
5482 | |
5483 | static drflac_bool32 drflac__seek_subframe(drflac_bs* bs, drflac_frame* frame, int subframeIndex) |
5484 | { |
5485 | drflac_subframe* pSubframe; |
5486 | drflac_uint32 subframeBitsPerSample; |
5487 | |
5488 | DRFLAC_ASSERT(bs != NULL); |
5489 | DRFLAC_ASSERT(frame != NULL); |
5490 | |
5491 | pSubframe = frame->subframes + subframeIndex; |
5492 | if (!drflac__read_subframe_header(bs, pSubframe)) { |
5493 | return DRFLAC_FALSE; |
5494 | } |
5495 | |
5496 | /* Side channels require an extra bit per sample. Took a while to figure that one out... */ |
5497 | subframeBitsPerSample = frame->header.bitsPerSample; |
5498 | if ((frame->header.channelAssignment == DRFLAC_CHANNEL_ASSIGNMENT_LEFT_SIDE || frame->header.channelAssignment == DRFLAC_CHANNEL_ASSIGNMENT_MID_SIDE) && subframeIndex == 1) { |
5499 | subframeBitsPerSample += 1; |
5500 | } else if (frame->header.channelAssignment == DRFLAC_CHANNEL_ASSIGNMENT_RIGHT_SIDE && subframeIndex == 0) { |
5501 | subframeBitsPerSample += 1; |
5502 | } |
5503 | |
5504 | /* Need to handle wasted bits per sample. */ |
5505 | if (pSubframe->wastedBitsPerSample >= subframeBitsPerSample) { |
5506 | return DRFLAC_FALSE; |
5507 | } |
5508 | subframeBitsPerSample -= pSubframe->wastedBitsPerSample; |
5509 | |
5510 | pSubframe->pSamplesS32 = NULL; |
5511 | |
5512 | switch (pSubframe->subframeType) |
5513 | { |
5514 | case DRFLAC_SUBFRAME_CONSTANT: |
5515 | { |
5516 | if (!drflac__seek_bits(bs, subframeBitsPerSample)) { |
5517 | return DRFLAC_FALSE; |
5518 | } |
5519 | } break; |
5520 | |
5521 | case DRFLAC_SUBFRAME_VERBATIM: |
5522 | { |
5523 | unsigned int bitsToSeek = frame->header.blockSizeInPCMFrames * subframeBitsPerSample; |
5524 | if (!drflac__seek_bits(bs, bitsToSeek)) { |
5525 | return DRFLAC_FALSE; |
5526 | } |
5527 | } break; |
5528 | |
5529 | case DRFLAC_SUBFRAME_FIXED: |
5530 | { |
5531 | unsigned int bitsToSeek = pSubframe->lpcOrder * subframeBitsPerSample; |
5532 | if (!drflac__seek_bits(bs, bitsToSeek)) { |
5533 | return DRFLAC_FALSE; |
5534 | } |
5535 | |
5536 | if (!drflac__read_and_seek_residual(bs, frame->header.blockSizeInPCMFrames, pSubframe->lpcOrder)) { |
5537 | return DRFLAC_FALSE; |
5538 | } |
5539 | } break; |
5540 | |
5541 | case DRFLAC_SUBFRAME_LPC: |
5542 | { |
5543 | drflac_uint8 lpcPrecision; |
5544 | |
5545 | unsigned int bitsToSeek = pSubframe->lpcOrder * subframeBitsPerSample; |
5546 | if (!drflac__seek_bits(bs, bitsToSeek)) { |
5547 | return DRFLAC_FALSE; |
5548 | } |
5549 | |
5550 | if (!drflac__read_uint8(bs, 4, &lpcPrecision)) { |
5551 | return DRFLAC_FALSE; |
5552 | } |
5553 | if (lpcPrecision == 15) { |
5554 | return DRFLAC_FALSE; /* Invalid. */ |
5555 | } |
5556 | lpcPrecision += 1; |
5557 | |
5558 | |
5559 | bitsToSeek = (pSubframe->lpcOrder * lpcPrecision) + 5; /* +5 for shift. */ |
5560 | if (!drflac__seek_bits(bs, bitsToSeek)) { |
5561 | return DRFLAC_FALSE; |
5562 | } |
5563 | |
5564 | if (!drflac__read_and_seek_residual(bs, frame->header.blockSizeInPCMFrames, pSubframe->lpcOrder)) { |
5565 | return DRFLAC_FALSE; |
5566 | } |
5567 | } break; |
5568 | |
5569 | default: return DRFLAC_FALSE; |
5570 | } |
5571 | |
5572 | return DRFLAC_TRUE; |
5573 | } |
5574 | |
5575 | |
5576 | static DRFLAC_INLINE drflac_uint8 drflac__get_channel_count_from_channel_assignment(drflac_int8 channelAssignment) |
5577 | { |
5578 | drflac_uint8 lookup[] = {1, 2, 3, 4, 5, 6, 7, 8, 2, 2, 2}; |
5579 | |
5580 | DRFLAC_ASSERT(channelAssignment <= 10); |
5581 | return lookup[channelAssignment]; |
5582 | } |
5583 | |
5584 | static drflac_result drflac__decode_flac_frame(drflac* pFlac) |
5585 | { |
5586 | int channelCount; |
5587 | int i; |
5588 | drflac_uint8 paddingSizeInBits; |
5589 | drflac_uint16 desiredCRC16; |
5590 | #ifndef DR_FLAC_NO_CRC |
5591 | drflac_uint16 actualCRC16; |
5592 | #endif |
5593 | |
5594 | /* This function should be called while the stream is sitting on the first byte after the frame header. */ |
5595 | DRFLAC_ZERO_MEMORY(pFlac->currentFLACFrame.subframes, sizeof(pFlac->currentFLACFrame.subframes)); |
5596 | |
5597 | /* The frame block size must never be larger than the maximum block size defined by the FLAC stream. */ |
5598 | if (pFlac->currentFLACFrame.header.blockSizeInPCMFrames > pFlac->maxBlockSizeInPCMFrames) { |
5599 | return DRFLAC_ERROR; |
5600 | } |
5601 | |
5602 | /* The number of channels in the frame must match the channel count from the STREAMINFO block. */ |
5603 | channelCount = drflac__get_channel_count_from_channel_assignment(pFlac->currentFLACFrame.header.channelAssignment); |
5604 | if (channelCount != (int)pFlac->channels) { |
5605 | return DRFLAC_ERROR; |
5606 | } |
5607 | |
5608 | for (i = 0; i < channelCount; ++i) { |
5609 | if (!drflac__decode_subframe(&pFlac->bs, &pFlac->currentFLACFrame, i, pFlac->pDecodedSamples + (pFlac->currentFLACFrame.header.blockSizeInPCMFrames * i))) { |
5610 | return DRFLAC_ERROR; |
5611 | } |
5612 | } |
5613 | |
5614 | paddingSizeInBits = (drflac_uint8)(DRFLAC_CACHE_L1_BITS_REMAINING(&pFlac->bs) & 7); |
5615 | if (paddingSizeInBits > 0) { |
5616 | drflac_uint8 padding = 0; |
5617 | if (!drflac__read_uint8(&pFlac->bs, paddingSizeInBits, &padding)) { |
5618 | return DRFLAC_AT_END; |
5619 | } |
5620 | } |
5621 | |
5622 | #ifndef DR_FLAC_NO_CRC |
5623 | actualCRC16 = drflac__flush_crc16(&pFlac->bs); |
5624 | #endif |
5625 | if (!drflac__read_uint16(&pFlac->bs, 16, &desiredCRC16)) { |
5626 | return DRFLAC_AT_END; |
5627 | } |
5628 | |
5629 | #ifndef DR_FLAC_NO_CRC |
5630 | if (actualCRC16 != desiredCRC16) { |
5631 | return DRFLAC_CRC_MISMATCH; /* CRC mismatch. */ |
5632 | } |
5633 | #endif |
5634 | |
5635 | pFlac->currentFLACFrame.pcmFramesRemaining = pFlac->currentFLACFrame.header.blockSizeInPCMFrames; |
5636 | |
5637 | return DRFLAC_SUCCESS; |
5638 | } |
5639 | |
5640 | static drflac_result drflac__seek_flac_frame(drflac* pFlac) |
5641 | { |
5642 | int channelCount; |
5643 | int i; |
5644 | drflac_uint16 desiredCRC16; |
5645 | #ifndef DR_FLAC_NO_CRC |
5646 | drflac_uint16 actualCRC16; |
5647 | #endif |
5648 | |
5649 | channelCount = drflac__get_channel_count_from_channel_assignment(pFlac->currentFLACFrame.header.channelAssignment); |
5650 | for (i = 0; i < channelCount; ++i) { |
5651 | if (!drflac__seek_subframe(&pFlac->bs, &pFlac->currentFLACFrame, i)) { |
5652 | return DRFLAC_ERROR; |
5653 | } |
5654 | } |
5655 | |
5656 | /* Padding. */ |
5657 | if (!drflac__seek_bits(&pFlac->bs, DRFLAC_CACHE_L1_BITS_REMAINING(&pFlac->bs) & 7)) { |
5658 | return DRFLAC_ERROR; |
5659 | } |
5660 | |
5661 | /* CRC. */ |
5662 | #ifndef DR_FLAC_NO_CRC |
5663 | actualCRC16 = drflac__flush_crc16(&pFlac->bs); |
5664 | #endif |
5665 | if (!drflac__read_uint16(&pFlac->bs, 16, &desiredCRC16)) { |
5666 | return DRFLAC_AT_END; |
5667 | } |
5668 | |
5669 | #ifndef DR_FLAC_NO_CRC |
5670 | if (actualCRC16 != desiredCRC16) { |
5671 | return DRFLAC_CRC_MISMATCH; /* CRC mismatch. */ |
5672 | } |
5673 | #endif |
5674 | |
5675 | return DRFLAC_SUCCESS; |
5676 | } |
5677 | |
5678 | static drflac_bool32 drflac__read_and_decode_next_flac_frame(drflac* pFlac) |
5679 | { |
5680 | DRFLAC_ASSERT(pFlac != NULL); |
5681 | |
5682 | for (;;) { |
5683 | drflac_result result; |
5684 | |
5685 | if (!drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFLACFrame.header)) { |
5686 | return DRFLAC_FALSE; |
5687 | } |
5688 | |
5689 | result = drflac__decode_flac_frame(pFlac); |
5690 | if (result != DRFLAC_SUCCESS) { |
5691 | if (result == DRFLAC_CRC_MISMATCH) { |
5692 | continue; /* CRC mismatch. Skip to the next frame. */ |
5693 | } else { |
5694 | return DRFLAC_FALSE; |
5695 | } |
5696 | } |
5697 | |
5698 | return DRFLAC_TRUE; |
5699 | } |
5700 | } |
5701 | |
5702 | static void drflac__get_pcm_frame_range_of_current_flac_frame(drflac* pFlac, drflac_uint64* pFirstPCMFrame, drflac_uint64* pLastPCMFrame) |
5703 | { |
5704 | drflac_uint64 firstPCMFrame; |
5705 | drflac_uint64 lastPCMFrame; |
5706 | |
5707 | DRFLAC_ASSERT(pFlac != NULL); |
5708 | |
5709 | firstPCMFrame = pFlac->currentFLACFrame.header.pcmFrameNumber; |
5710 | if (firstPCMFrame == 0) { |
5711 | firstPCMFrame = ((drflac_uint64)pFlac->currentFLACFrame.header.flacFrameNumber) * pFlac->maxBlockSizeInPCMFrames; |
5712 | } |
5713 | |
5714 | lastPCMFrame = firstPCMFrame + pFlac->currentFLACFrame.header.blockSizeInPCMFrames; |
5715 | if (lastPCMFrame > 0) { |
5716 | lastPCMFrame -= 1; /* Needs to be zero based. */ |
5717 | } |
5718 | |
5719 | if (pFirstPCMFrame) { |
5720 | *pFirstPCMFrame = firstPCMFrame; |
5721 | } |
5722 | if (pLastPCMFrame) { |
5723 | *pLastPCMFrame = lastPCMFrame; |
5724 | } |
5725 | } |
5726 | |
5727 | static drflac_bool32 drflac__seek_to_first_frame(drflac* pFlac) |
5728 | { |
5729 | drflac_bool32 result; |
5730 | |
5731 | DRFLAC_ASSERT(pFlac != NULL); |
5732 | |
5733 | result = drflac__seek_to_byte(&pFlac->bs, pFlac->firstFLACFramePosInBytes); |
5734 | |
5735 | DRFLAC_ZERO_MEMORY(&pFlac->currentFLACFrame, sizeof(pFlac->currentFLACFrame)); |
5736 | pFlac->currentPCMFrame = 0; |
5737 | |
5738 | return result; |
5739 | } |
5740 | |
5741 | static DRFLAC_INLINE drflac_result drflac__seek_to_next_flac_frame(drflac* pFlac) |
5742 | { |
5743 | /* This function should only ever be called while the decoder is sitting on the first byte past the FRAME_HEADER section. */ |
5744 | DRFLAC_ASSERT(pFlac != NULL); |
5745 | return drflac__seek_flac_frame(pFlac); |
5746 | } |
5747 | |
5748 | |
5749 | static drflac_uint64 drflac__seek_forward_by_pcm_frames(drflac* pFlac, drflac_uint64 pcmFramesToSeek) |
5750 | { |
5751 | drflac_uint64 pcmFramesRead = 0; |
5752 | while (pcmFramesToSeek > 0) { |
5753 | if (pFlac->currentFLACFrame.pcmFramesRemaining == 0) { |
5754 | if (!drflac__read_and_decode_next_flac_frame(pFlac)) { |
5755 | break; /* Couldn't read the next frame, so just break from the loop and return. */ |
5756 | } |
5757 | } else { |
5758 | if (pFlac->currentFLACFrame.pcmFramesRemaining > pcmFramesToSeek) { |
5759 | pcmFramesRead += pcmFramesToSeek; |
5760 | pFlac->currentFLACFrame.pcmFramesRemaining -= (drflac_uint32)pcmFramesToSeek; /* <-- Safe cast. Will always be < currentFrame.pcmFramesRemaining < 65536. */ |
5761 | pcmFramesToSeek = 0; |
5762 | } else { |
5763 | pcmFramesRead += pFlac->currentFLACFrame.pcmFramesRemaining; |
5764 | pcmFramesToSeek -= pFlac->currentFLACFrame.pcmFramesRemaining; |
5765 | pFlac->currentFLACFrame.pcmFramesRemaining = 0; |
5766 | } |
5767 | } |
5768 | } |
5769 | |
5770 | pFlac->currentPCMFrame += pcmFramesRead; |
5771 | return pcmFramesRead; |
5772 | } |
5773 | |
5774 | |
5775 | static drflac_bool32 drflac__seek_to_pcm_frame__brute_force(drflac* pFlac, drflac_uint64 pcmFrameIndex) |
5776 | { |
5777 | drflac_bool32 isMidFrame = DRFLAC_FALSE; |
5778 | drflac_uint64 runningPCMFrameCount; |
5779 | |
5780 | DRFLAC_ASSERT(pFlac != NULL); |
5781 | |
5782 | /* 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. */ |
5783 | if (pcmFrameIndex >= pFlac->currentPCMFrame) { |
5784 | /* Seeking forward. Need to seek from the current position. */ |
5785 | runningPCMFrameCount = pFlac->currentPCMFrame; |
5786 | |
5787 | /* The frame header for the first frame may not yet have been read. We need to do that if necessary. */ |
5788 | if (pFlac->currentPCMFrame == 0 && pFlac->currentFLACFrame.pcmFramesRemaining == 0) { |
5789 | if (!drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFLACFrame.header)) { |
5790 | return DRFLAC_FALSE; |
5791 | } |
5792 | } else { |
5793 | isMidFrame = DRFLAC_TRUE; |
5794 | } |
5795 | } else { |
5796 | /* Seeking backwards. Need to seek from the start of the file. */ |
5797 | runningPCMFrameCount = 0; |
5798 | |
5799 | /* Move back to the start. */ |
5800 | if (!drflac__seek_to_first_frame(pFlac)) { |
5801 | return DRFLAC_FALSE; |
5802 | } |
5803 | |
5804 | /* Decode the first frame in preparation for sample-exact seeking below. */ |
5805 | if (!drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFLACFrame.header)) { |
5806 | return DRFLAC_FALSE; |
5807 | } |
5808 | } |
5809 | |
5810 | /* |
5811 | 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 |
5812 | header. If based on the header we can determine that the frame contains the sample, we do a full decode of that frame. |
5813 | */ |
5814 | for (;;) { |
5815 | drflac_uint64 pcmFrameCountInThisFLACFrame; |
5816 | drflac_uint64 firstPCMFrameInFLACFrame = 0; |
5817 | drflac_uint64 lastPCMFrameInFLACFrame = 0; |
5818 | |
5819 | drflac__get_pcm_frame_range_of_current_flac_frame(pFlac, &firstPCMFrameInFLACFrame, &lastPCMFrameInFLACFrame); |
5820 | |
5821 | pcmFrameCountInThisFLACFrame = (lastPCMFrameInFLACFrame - firstPCMFrameInFLACFrame) + 1; |
5822 | if (pcmFrameIndex < (runningPCMFrameCount + pcmFrameCountInThisFLACFrame)) { |
5823 | /* |
5824 | 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 |
5825 | it never existed and keep iterating. |
5826 | */ |
5827 | drflac_uint64 pcmFramesToDecode = pcmFrameIndex - runningPCMFrameCount; |
5828 | |
5829 | if (!isMidFrame) { |
5830 | drflac_result result = drflac__decode_flac_frame(pFlac); |
5831 | if (result == DRFLAC_SUCCESS) { |
5832 | /* The frame is valid. We just need to skip over some samples to ensure it's sample-exact. */ |
5833 | return drflac__seek_forward_by_pcm_frames(pFlac, pcmFramesToDecode) == pcmFramesToDecode; /* <-- If this fails, something bad has happened (it should never fail). */ |
5834 | } else { |
5835 | if (result == DRFLAC_CRC_MISMATCH) { |
5836 | goto next_iteration; /* CRC mismatch. Pretend this frame never existed. */ |
5837 | } else { |
5838 | return DRFLAC_FALSE; |
5839 | } |
5840 | } |
5841 | } else { |
5842 | /* We started seeking mid-frame which means we need to skip the frame decoding part. */ |
5843 | return drflac__seek_forward_by_pcm_frames(pFlac, pcmFramesToDecode) == pcmFramesToDecode; |
5844 | } |
5845 | } else { |
5846 | /* |
5847 | 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 |
5848 | frame never existed and leave the running sample count untouched. |
5849 | */ |
5850 | if (!isMidFrame) { |
5851 | drflac_result result = drflac__seek_to_next_flac_frame(pFlac); |
5852 | if (result == DRFLAC_SUCCESS) { |
5853 | runningPCMFrameCount += pcmFrameCountInThisFLACFrame; |
5854 | } else { |
5855 | if (result == DRFLAC_CRC_MISMATCH) { |
5856 | goto next_iteration; /* CRC mismatch. Pretend this frame never existed. */ |
5857 | } else { |
5858 | return DRFLAC_FALSE; |
5859 | } |
5860 | } |
5861 | } else { |
5862 | /* |
5863 | We started seeking mid-frame which means we need to seek by reading to the end of the frame instead of with |
5864 | drflac__seek_to_next_flac_frame() which only works if the decoder is sitting on the byte just after the frame header. |
5865 | */ |
5866 | runningPCMFrameCount += pFlac->currentFLACFrame.pcmFramesRemaining; |
5867 | pFlac->currentFLACFrame.pcmFramesRemaining = 0; |
5868 | isMidFrame = DRFLAC_FALSE; |
5869 | } |
5870 | |
5871 | /* If we are seeking to the end of the file and we've just hit it, we're done. */ |
5872 | if (pcmFrameIndex == pFlac->totalPCMFrameCount && runningPCMFrameCount == pFlac->totalPCMFrameCount) { |
5873 | return DRFLAC_TRUE; |
5874 | } |
5875 | } |
5876 | |
5877 | next_iteration: |
5878 | /* Grab the next frame in preparation for the next iteration. */ |
5879 | if (!drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFLACFrame.header)) { |
5880 | return DRFLAC_FALSE; |
5881 | } |
5882 | } |
5883 | } |
5884 | |
5885 | |
5886 | #if !defined(DR_FLAC_NO_CRC) |
5887 | /* |
5888 | We use an average compression ratio to determine our approximate start location. FLAC files are generally about 50%-70% the size of their |
5889 | 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 |
5890 | location. |
5891 | */ |
5892 | #define DRFLAC_BINARY_SEARCH_APPROX_COMPRESSION_RATIO 0.6f |
5893 | |
5894 | 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) |
5895 | { |
5896 | DRFLAC_ASSERT(pFlac != NULL); |
5897 | DRFLAC_ASSERT(pLastSuccessfulSeekOffset != NULL); |
5898 | DRFLAC_ASSERT(targetByte >= rangeLo); |
5899 | DRFLAC_ASSERT(targetByte <= rangeHi); |
5900 | |
5901 | *pLastSuccessfulSeekOffset = pFlac->firstFLACFramePosInBytes; |
5902 | |
5903 | for (;;) { |
5904 | /* After rangeLo == rangeHi == targetByte fails, we need to break out. */ |
5905 | drflac_uint64 lastTargetByte = targetByte; |
5906 | |
5907 | /* 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. */ |
5908 | if (!drflac__seek_to_byte(&pFlac->bs, targetByte)) { |
5909 | /* If we couldn't even seek to the first byte in the stream we have a problem. Just abandon the whole thing. */ |
5910 | if (targetByte == 0) { |
5911 | drflac__seek_to_first_frame(pFlac); /* Try to recover. */ |
5912 | return DRFLAC_FALSE; |
5913 | } |
5914 | |
5915 | /* Halve the byte location and continue. */ |
5916 | targetByte = rangeLo + ((rangeHi - rangeLo)/2); |
5917 | rangeHi = targetByte; |
5918 | } else { |
5919 | /* Getting here should mean that we have seeked to an appropriate byte. */ |
5920 | |
5921 | /* Clear the details of the FLAC frame so we don't misreport data. */ |
5922 | DRFLAC_ZERO_MEMORY(&pFlac->currentFLACFrame, sizeof(pFlac->currentFLACFrame)); |
5923 | |
5924 | /* |
5925 | 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 |
5926 | 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 |
5927 | so it needs to stay this way for now. |
5928 | */ |
5929 | #if 1 |
5930 | if (!drflac__read_and_decode_next_flac_frame(pFlac)) { |
5931 | /* Halve the byte location and continue. */ |
5932 | targetByte = rangeLo + ((rangeHi - rangeLo)/2); |
5933 | rangeHi = targetByte; |
5934 | } else { |
5935 | break; |
5936 | } |
5937 | #else |
5938 | if (!drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFLACFrame.header)) { |
5939 | /* Halve the byte location and continue. */ |
5940 | targetByte = rangeLo + ((rangeHi - rangeLo)/2); |
5941 | rangeHi = targetByte; |
5942 | } else { |
5943 | break; |
5944 | } |
5945 | #endif |
5946 | } |
5947 | |
5948 | /* We already tried this byte and there are no more to try, break out. */ |
5949 | if(targetByte == lastTargetByte) { |
5950 | return DRFLAC_FALSE; |
5951 | } |
5952 | } |
5953 | |
5954 | /* The current PCM frame needs to be updated based on the frame we just seeked to. */ |
5955 | drflac__get_pcm_frame_range_of_current_flac_frame(pFlac, &pFlac->currentPCMFrame, NULL); |
5956 | |
5957 | DRFLAC_ASSERT(targetByte <= rangeHi); |
5958 | |
5959 | *pLastSuccessfulSeekOffset = targetByte; |
5960 | return DRFLAC_TRUE; |
5961 | } |
5962 | |
5963 | static drflac_bool32 drflac__decode_flac_frame_and_seek_forward_by_pcm_frames(drflac* pFlac, drflac_uint64 offset) |
5964 | { |
9e052883 |
5965 | /* This section of code would be used if we were only decoding the FLAC frame header when calling drflac__seek_to_approximate_flac_frame_to_byte(). */ |
5966 | #if 0 |
5967 | if (drflac__decode_flac_frame(pFlac) != DRFLAC_SUCCESS) { |
5968 | /* We failed to decode this frame which may be due to it being corrupt. We'll just use the next valid FLAC frame. */ |
5969 | if (drflac__read_and_decode_next_flac_frame(pFlac) == DRFLAC_FALSE) { |
5970 | return DRFLAC_FALSE; |
5971 | } |
5972 | } |
5973 | #endif |
5974 | |
2ff0b512 |
5975 | return drflac__seek_forward_by_pcm_frames(pFlac, offset) == offset; |
5976 | } |
5977 | |
5978 | |
5979 | static drflac_bool32 drflac__seek_to_pcm_frame__binary_search_internal(drflac* pFlac, drflac_uint64 pcmFrameIndex, drflac_uint64 byteRangeLo, drflac_uint64 byteRangeHi) |
5980 | { |
5981 | /* This assumes pFlac->currentPCMFrame is sitting on byteRangeLo upon entry. */ |
5982 | |
5983 | drflac_uint64 targetByte; |
5984 | drflac_uint64 pcmRangeLo = pFlac->totalPCMFrameCount; |
5985 | drflac_uint64 pcmRangeHi = 0; |
5986 | drflac_uint64 lastSuccessfulSeekOffset = (drflac_uint64)-1; |
5987 | drflac_uint64 closestSeekOffsetBeforeTargetPCMFrame = byteRangeLo; |
5988 | drflac_uint32 seekForwardThreshold = (pFlac->maxBlockSizeInPCMFrames != 0) ? pFlac->maxBlockSizeInPCMFrames*2 : 4096; |
5989 | |
5990 | targetByte = byteRangeLo + (drflac_uint64)(((drflac_int64)((pcmFrameIndex - pFlac->currentPCMFrame) * pFlac->channels * pFlac->bitsPerSample)/8.0f) * DRFLAC_BINARY_SEARCH_APPROX_COMPRESSION_RATIO); |
5991 | if (targetByte > byteRangeHi) { |
5992 | targetByte = byteRangeHi; |
5993 | } |
5994 | |
5995 | for (;;) { |
5996 | if (drflac__seek_to_approximate_flac_frame_to_byte(pFlac, targetByte, byteRangeLo, byteRangeHi, &lastSuccessfulSeekOffset)) { |
5997 | /* We found a FLAC frame. We need to check if it contains the sample we're looking for. */ |
5998 | drflac_uint64 newPCMRangeLo; |
5999 | drflac_uint64 newPCMRangeHi; |
6000 | drflac__get_pcm_frame_range_of_current_flac_frame(pFlac, &newPCMRangeLo, &newPCMRangeHi); |
6001 | |
6002 | /* If we selected the same frame, it means we should be pretty close. Just decode the rest. */ |
6003 | if (pcmRangeLo == newPCMRangeLo) { |
6004 | if (!drflac__seek_to_approximate_flac_frame_to_byte(pFlac, closestSeekOffsetBeforeTargetPCMFrame, closestSeekOffsetBeforeTargetPCMFrame, byteRangeHi, &lastSuccessfulSeekOffset)) { |
6005 | break; /* Failed to seek to closest frame. */ |
6006 | } |
6007 | |
6008 | if (drflac__decode_flac_frame_and_seek_forward_by_pcm_frames(pFlac, pcmFrameIndex - pFlac->currentPCMFrame)) { |
6009 | return DRFLAC_TRUE; |
6010 | } else { |
6011 | break; /* Failed to seek forward. */ |
6012 | } |
6013 | } |
6014 | |
6015 | pcmRangeLo = newPCMRangeLo; |
6016 | pcmRangeHi = newPCMRangeHi; |
6017 | |
6018 | if (pcmRangeLo <= pcmFrameIndex && pcmRangeHi >= pcmFrameIndex) { |
6019 | /* The target PCM frame is in this FLAC frame. */ |
6020 | if (drflac__decode_flac_frame_and_seek_forward_by_pcm_frames(pFlac, pcmFrameIndex - pFlac->currentPCMFrame) ) { |
6021 | return DRFLAC_TRUE; |
6022 | } else { |
6023 | break; /* Failed to seek to FLAC frame. */ |
6024 | } |
6025 | } else { |
6026 | const float approxCompressionRatio = (drflac_int64)(lastSuccessfulSeekOffset - pFlac->firstFLACFramePosInBytes) / ((drflac_int64)(pcmRangeLo * pFlac->channels * pFlac->bitsPerSample)/8.0f); |
6027 | |
6028 | if (pcmRangeLo > pcmFrameIndex) { |
6029 | /* We seeked too far forward. We need to move our target byte backward and try again. */ |
6030 | byteRangeHi = lastSuccessfulSeekOffset; |
6031 | if (byteRangeLo > byteRangeHi) { |
6032 | byteRangeLo = byteRangeHi; |
6033 | } |
6034 | |
6035 | targetByte = byteRangeLo + ((byteRangeHi - byteRangeLo) / 2); |
6036 | if (targetByte < byteRangeLo) { |
6037 | targetByte = byteRangeLo; |
6038 | } |
6039 | } else /*if (pcmRangeHi < pcmFrameIndex)*/ { |
6040 | /* We didn't seek far enough. We need to move our target byte forward and try again. */ |
6041 | |
6042 | /* If we're close enough we can just seek forward. */ |
6043 | if ((pcmFrameIndex - pcmRangeLo) < seekForwardThreshold) { |
6044 | if (drflac__decode_flac_frame_and_seek_forward_by_pcm_frames(pFlac, pcmFrameIndex - pFlac->currentPCMFrame)) { |
6045 | return DRFLAC_TRUE; |
6046 | } else { |
6047 | break; /* Failed to seek to FLAC frame. */ |
6048 | } |
6049 | } else { |
6050 | byteRangeLo = lastSuccessfulSeekOffset; |
6051 | if (byteRangeHi < byteRangeLo) { |
6052 | byteRangeHi = byteRangeLo; |
6053 | } |
6054 | |
6055 | targetByte = lastSuccessfulSeekOffset + (drflac_uint64)(((drflac_int64)((pcmFrameIndex-pcmRangeLo) * pFlac->channels * pFlac->bitsPerSample)/8.0f) * approxCompressionRatio); |
6056 | if (targetByte > byteRangeHi) { |
6057 | targetByte = byteRangeHi; |
6058 | } |
6059 | |
6060 | if (closestSeekOffsetBeforeTargetPCMFrame < lastSuccessfulSeekOffset) { |
6061 | closestSeekOffsetBeforeTargetPCMFrame = lastSuccessfulSeekOffset; |
6062 | } |
6063 | } |
6064 | } |
6065 | } |
6066 | } else { |
6067 | /* Getting here is really bad. We just recover as best we can, but moving to the first frame in the stream, and then abort. */ |
6068 | break; |
6069 | } |
6070 | } |
6071 | |
6072 | drflac__seek_to_first_frame(pFlac); /* <-- Try to recover. */ |
6073 | return DRFLAC_FALSE; |
6074 | } |
6075 | |
6076 | static drflac_bool32 drflac__seek_to_pcm_frame__binary_search(drflac* pFlac, drflac_uint64 pcmFrameIndex) |
6077 | { |
6078 | drflac_uint64 byteRangeLo; |
6079 | drflac_uint64 byteRangeHi; |
6080 | drflac_uint32 seekForwardThreshold = (pFlac->maxBlockSizeInPCMFrames != 0) ? pFlac->maxBlockSizeInPCMFrames*2 : 4096; |
6081 | |
6082 | /* Our algorithm currently assumes the FLAC stream is currently sitting at the start. */ |
6083 | if (drflac__seek_to_first_frame(pFlac) == DRFLAC_FALSE) { |
6084 | return DRFLAC_FALSE; |
6085 | } |
6086 | |
6087 | /* If we're close enough to the start, just move to the start and seek forward. */ |
6088 | if (pcmFrameIndex < seekForwardThreshold) { |
6089 | return drflac__seek_forward_by_pcm_frames(pFlac, pcmFrameIndex) == pcmFrameIndex; |
6090 | } |
6091 | |
6092 | /* |
6093 | 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 |
6094 | 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. |
6095 | */ |
6096 | byteRangeLo = pFlac->firstFLACFramePosInBytes; |
6097 | byteRangeHi = pFlac->firstFLACFramePosInBytes + (drflac_uint64)((drflac_int64)(pFlac->totalPCMFrameCount * pFlac->channels * pFlac->bitsPerSample)/8.0f); |
6098 | |
6099 | return drflac__seek_to_pcm_frame__binary_search_internal(pFlac, pcmFrameIndex, byteRangeLo, byteRangeHi); |
6100 | } |
6101 | #endif /* !DR_FLAC_NO_CRC */ |
6102 | |
6103 | static drflac_bool32 drflac__seek_to_pcm_frame__seek_table(drflac* pFlac, drflac_uint64 pcmFrameIndex) |
6104 | { |
6105 | drflac_uint32 iClosestSeekpoint = 0; |
6106 | drflac_bool32 isMidFrame = DRFLAC_FALSE; |
6107 | drflac_uint64 runningPCMFrameCount; |
6108 | drflac_uint32 iSeekpoint; |
6109 | |
6110 | |
6111 | DRFLAC_ASSERT(pFlac != NULL); |
6112 | |
6113 | if (pFlac->pSeekpoints == NULL || pFlac->seekpointCount == 0) { |
6114 | return DRFLAC_FALSE; |
6115 | } |
6116 | |
9e052883 |
6117 | /* Do not use the seektable if pcmFramIndex is not coverd by it. */ |
6118 | if (pFlac->pSeekpoints[0].firstPCMFrame > pcmFrameIndex) { |
6119 | return DRFLAC_FALSE; |
6120 | } |
6121 | |
2ff0b512 |
6122 | for (iSeekpoint = 0; iSeekpoint < pFlac->seekpointCount; ++iSeekpoint) { |
6123 | if (pFlac->pSeekpoints[iSeekpoint].firstPCMFrame >= pcmFrameIndex) { |
6124 | break; |
6125 | } |
6126 | |
6127 | iClosestSeekpoint = iSeekpoint; |
6128 | } |
6129 | |
6130 | /* There's been cases where the seek table contains only zeros. We need to do some basic validation on the closest seekpoint. */ |
6131 | if (pFlac->pSeekpoints[iClosestSeekpoint].pcmFrameCount == 0 || pFlac->pSeekpoints[iClosestSeekpoint].pcmFrameCount > pFlac->maxBlockSizeInPCMFrames) { |
6132 | return DRFLAC_FALSE; |
6133 | } |
6134 | if (pFlac->pSeekpoints[iClosestSeekpoint].firstPCMFrame > pFlac->totalPCMFrameCount && pFlac->totalPCMFrameCount > 0) { |
6135 | return DRFLAC_FALSE; |
6136 | } |
6137 | |
6138 | #if !defined(DR_FLAC_NO_CRC) |
6139 | /* 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. */ |
6140 | if (pFlac->totalPCMFrameCount > 0) { |
6141 | drflac_uint64 byteRangeLo; |
6142 | drflac_uint64 byteRangeHi; |
6143 | |
6144 | byteRangeHi = pFlac->firstFLACFramePosInBytes + (drflac_uint64)((drflac_int64)(pFlac->totalPCMFrameCount * pFlac->channels * pFlac->bitsPerSample)/8.0f); |
6145 | byteRangeLo = pFlac->firstFLACFramePosInBytes + pFlac->pSeekpoints[iClosestSeekpoint].flacFrameOffset; |
6146 | |
6147 | /* |
6148 | 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 |
6149 | value for byteRangeHi which will clamp it appropriately. |
6150 | |
6151 | Note that the next seekpoint must have an offset greater than the closest seekpoint because otherwise our binary search algorithm will break down. There |
6152 | 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. |
6153 | */ |
6154 | if (iClosestSeekpoint < pFlac->seekpointCount-1) { |
6155 | drflac_uint32 iNextSeekpoint = iClosestSeekpoint + 1; |
6156 | |
6157 | /* Basic validation on the seekpoints to ensure they're usable. */ |
6158 | if (pFlac->pSeekpoints[iClosestSeekpoint].flacFrameOffset >= pFlac->pSeekpoints[iNextSeekpoint].flacFrameOffset || pFlac->pSeekpoints[iNextSeekpoint].pcmFrameCount == 0) { |
6159 | return DRFLAC_FALSE; /* The next seekpoint doesn't look right. The seek table cannot be trusted from here. Abort. */ |
6160 | } |
6161 | |
6162 | if (pFlac->pSeekpoints[iNextSeekpoint].firstPCMFrame != (((drflac_uint64)0xFFFFFFFF << 32) | 0xFFFFFFFF)) { /* Make sure it's not a placeholder seekpoint. */ |
6163 | byteRangeHi = pFlac->firstFLACFramePosInBytes + pFlac->pSeekpoints[iNextSeekpoint].flacFrameOffset - 1; /* byteRangeHi must be zero based. */ |
6164 | } |
6165 | } |
6166 | |
6167 | if (drflac__seek_to_byte(&pFlac->bs, pFlac->firstFLACFramePosInBytes + pFlac->pSeekpoints[iClosestSeekpoint].flacFrameOffset)) { |
6168 | if (drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFLACFrame.header)) { |
6169 | drflac__get_pcm_frame_range_of_current_flac_frame(pFlac, &pFlac->currentPCMFrame, NULL); |
6170 | |
6171 | if (drflac__seek_to_pcm_frame__binary_search_internal(pFlac, pcmFrameIndex, byteRangeLo, byteRangeHi)) { |
6172 | return DRFLAC_TRUE; |
6173 | } |
6174 | } |
6175 | } |
6176 | } |
6177 | #endif /* !DR_FLAC_NO_CRC */ |
6178 | |
6179 | /* Getting here means we need to use a slower algorithm because the binary search method failed or cannot be used. */ |
6180 | |
6181 | /* |
6182 | 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 |
6183 | from the seekpoint's first sample. |
6184 | */ |
6185 | if (pcmFrameIndex >= pFlac->currentPCMFrame && pFlac->pSeekpoints[iClosestSeekpoint].firstPCMFrame <= pFlac->currentPCMFrame) { |
6186 | /* Optimized case. Just seek forward from where we are. */ |
6187 | runningPCMFrameCount = pFlac->currentPCMFrame; |
6188 | |
6189 | /* The frame header for the first frame may not yet have been read. We need to do that if necessary. */ |
6190 | if (pFlac->currentPCMFrame == 0 && pFlac->currentFLACFrame.pcmFramesRemaining == 0) { |
6191 | if (!drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFLACFrame.header)) { |
6192 | return DRFLAC_FALSE; |
6193 | } |
6194 | } else { |
6195 | isMidFrame = DRFLAC_TRUE; |
6196 | } |
6197 | } else { |
6198 | /* Slower case. Seek to the start of the seekpoint and then seek forward from there. */ |
6199 | runningPCMFrameCount = pFlac->pSeekpoints[iClosestSeekpoint].firstPCMFrame; |
6200 | |
6201 | if (!drflac__seek_to_byte(&pFlac->bs, pFlac->firstFLACFramePosInBytes + pFlac->pSeekpoints[iClosestSeekpoint].flacFrameOffset)) { |
6202 | return DRFLAC_FALSE; |
6203 | } |
6204 | |
6205 | /* Grab the frame the seekpoint is sitting on in preparation for the sample-exact seeking below. */ |
6206 | if (!drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFLACFrame.header)) { |
6207 | return DRFLAC_FALSE; |
6208 | } |
6209 | } |
6210 | |
6211 | for (;;) { |
6212 | drflac_uint64 pcmFrameCountInThisFLACFrame; |
6213 | drflac_uint64 firstPCMFrameInFLACFrame = 0; |
6214 | drflac_uint64 lastPCMFrameInFLACFrame = 0; |
6215 | |
6216 | drflac__get_pcm_frame_range_of_current_flac_frame(pFlac, &firstPCMFrameInFLACFrame, &lastPCMFrameInFLACFrame); |
6217 | |
6218 | pcmFrameCountInThisFLACFrame = (lastPCMFrameInFLACFrame - firstPCMFrameInFLACFrame) + 1; |
6219 | if (pcmFrameIndex < (runningPCMFrameCount + pcmFrameCountInThisFLACFrame)) { |
6220 | /* |
6221 | 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 |
6222 | it never existed and keep iterating. |
6223 | */ |
6224 | drflac_uint64 pcmFramesToDecode = pcmFrameIndex - runningPCMFrameCount; |
6225 | |
6226 | if (!isMidFrame) { |
6227 | drflac_result result = drflac__decode_flac_frame(pFlac); |
6228 | if (result == DRFLAC_SUCCESS) { |
6229 | /* The frame is valid. We just need to skip over some samples to ensure it's sample-exact. */ |
6230 | return drflac__seek_forward_by_pcm_frames(pFlac, pcmFramesToDecode) == pcmFramesToDecode; /* <-- If this fails, something bad has happened (it should never fail). */ |
6231 | } else { |
6232 | if (result == DRFLAC_CRC_MISMATCH) { |
6233 | goto next_iteration; /* CRC mismatch. Pretend this frame never existed. */ |
6234 | } else { |
6235 | return DRFLAC_FALSE; |
6236 | } |
6237 | } |
6238 | } else { |
6239 | /* We started seeking mid-frame which means we need to skip the frame decoding part. */ |
6240 | return drflac__seek_forward_by_pcm_frames(pFlac, pcmFramesToDecode) == pcmFramesToDecode; |
6241 | } |
6242 | } else { |
6243 | /* |
6244 | 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 |
6245 | frame never existed and leave the running sample count untouched. |
6246 | */ |
6247 | if (!isMidFrame) { |
6248 | drflac_result result = drflac__seek_to_next_flac_frame(pFlac); |
6249 | if (result == DRFLAC_SUCCESS) { |
6250 | runningPCMFrameCount += pcmFrameCountInThisFLACFrame; |
6251 | } else { |
6252 | if (result == DRFLAC_CRC_MISMATCH) { |
6253 | goto next_iteration; /* CRC mismatch. Pretend this frame never existed. */ |
6254 | } else { |
6255 | return DRFLAC_FALSE; |
6256 | } |
6257 | } |
6258 | } else { |
6259 | /* |
6260 | We started seeking mid-frame which means we need to seek by reading to the end of the frame instead of with |
6261 | drflac__seek_to_next_flac_frame() which only works if the decoder is sitting on the byte just after the frame header. |
6262 | */ |
6263 | runningPCMFrameCount += pFlac->currentFLACFrame.pcmFramesRemaining; |
6264 | pFlac->currentFLACFrame.pcmFramesRemaining = 0; |
6265 | isMidFrame = DRFLAC_FALSE; |
6266 | } |
6267 | |
6268 | /* If we are seeking to the end of the file and we've just hit it, we're done. */ |
6269 | if (pcmFrameIndex == pFlac->totalPCMFrameCount && runningPCMFrameCount == pFlac->totalPCMFrameCount) { |
6270 | return DRFLAC_TRUE; |
6271 | } |
6272 | } |
6273 | |
6274 | next_iteration: |
6275 | /* Grab the next frame in preparation for the next iteration. */ |
6276 | if (!drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFLACFrame.header)) { |
6277 | return DRFLAC_FALSE; |
6278 | } |
6279 | } |
6280 | } |
6281 | |
6282 | |
6283 | #ifndef DR_FLAC_NO_OGG |
6284 | typedef struct |
6285 | { |
6286 | drflac_uint8 capturePattern[4]; /* Should be "OggS" */ |
6287 | drflac_uint8 structureVersion; /* Always 0. */ |
6288 | drflac_uint8 headerType; |
6289 | drflac_uint64 granulePosition; |
6290 | drflac_uint32 serialNumber; |
6291 | drflac_uint32 sequenceNumber; |
6292 | drflac_uint32 checksum; |
6293 | drflac_uint8 segmentCount; |
6294 | drflac_uint8 segmentTable[255]; |
6295 | } drflac_ogg_page_header; |
6296 | #endif |
6297 | |
6298 | typedef struct |
6299 | { |
6300 | drflac_read_proc onRead; |
6301 | drflac_seek_proc onSeek; |
6302 | drflac_meta_proc onMeta; |
6303 | drflac_container container; |
6304 | void* pUserData; |
6305 | void* pUserDataMD; |
6306 | drflac_uint32 sampleRate; |
6307 | drflac_uint8 channels; |
6308 | drflac_uint8 bitsPerSample; |
6309 | drflac_uint64 totalPCMFrameCount; |
6310 | drflac_uint16 maxBlockSizeInPCMFrames; |
6311 | drflac_uint64 runningFilePos; |
6312 | drflac_bool32 hasStreamInfoBlock; |
6313 | drflac_bool32 hasMetadataBlocks; |
6314 | drflac_bs bs; /* <-- A bit streamer is required for loading data during initialization. */ |
6315 | drflac_frame_header firstFrameHeader; /* <-- The header of the first frame that was read during relaxed initalization. Only set if there is no STREAMINFO block. */ |
6316 | |
6317 | #ifndef DR_FLAC_NO_OGG |
6318 | drflac_uint32 oggSerial; |
6319 | drflac_uint64 oggFirstBytePos; |
6320 | drflac_ogg_page_header oggBosHeader; |
6321 | #endif |
6322 | } drflac_init_info; |
6323 | |
6324 | static DRFLAC_INLINE void drflac__decode_block_header(drflac_uint32 blockHeader, drflac_uint8* isLastBlock, drflac_uint8* blockType, drflac_uint32* blockSize) |
6325 | { |
6326 | blockHeader = drflac__be2host_32(blockHeader); |
6327 | *isLastBlock = (drflac_uint8)((blockHeader & 0x80000000UL) >> 31); |
6328 | *blockType = (drflac_uint8)((blockHeader & 0x7F000000UL) >> 24); |
6329 | *blockSize = (blockHeader & 0x00FFFFFFUL); |
6330 | } |
6331 | |
6332 | 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) |
6333 | { |
6334 | drflac_uint32 blockHeader; |
6335 | |
6336 | *blockSize = 0; |
6337 | if (onRead(pUserData, &blockHeader, 4) != 4) { |
6338 | return DRFLAC_FALSE; |
6339 | } |
6340 | |
6341 | drflac__decode_block_header(blockHeader, isLastBlock, blockType, blockSize); |
6342 | return DRFLAC_TRUE; |
6343 | } |
6344 | |
6345 | static drflac_bool32 drflac__read_streaminfo(drflac_read_proc onRead, void* pUserData, drflac_streaminfo* pStreamInfo) |
6346 | { |
6347 | drflac_uint32 blockSizes; |
6348 | drflac_uint64 frameSizes = 0; |
6349 | drflac_uint64 importantProps; |
6350 | drflac_uint8 md5[16]; |
6351 | |
6352 | /* min/max block size. */ |
6353 | if (onRead(pUserData, &blockSizes, 4) != 4) { |
6354 | return DRFLAC_FALSE; |
6355 | } |
6356 | |
6357 | /* min/max frame size. */ |
6358 | if (onRead(pUserData, &frameSizes, 6) != 6) { |
6359 | return DRFLAC_FALSE; |
6360 | } |
6361 | |
6362 | /* Sample rate, channels, bits per sample and total sample count. */ |
6363 | if (onRead(pUserData, &importantProps, 8) != 8) { |
6364 | return DRFLAC_FALSE; |
6365 | } |
6366 | |
6367 | /* MD5 */ |
6368 | if (onRead(pUserData, md5, sizeof(md5)) != sizeof(md5)) { |
6369 | return DRFLAC_FALSE; |
6370 | } |
6371 | |
6372 | blockSizes = drflac__be2host_32(blockSizes); |
6373 | frameSizes = drflac__be2host_64(frameSizes); |
6374 | importantProps = drflac__be2host_64(importantProps); |
6375 | |
6376 | pStreamInfo->minBlockSizeInPCMFrames = (drflac_uint16)((blockSizes & 0xFFFF0000) >> 16); |
6377 | pStreamInfo->maxBlockSizeInPCMFrames = (drflac_uint16) (blockSizes & 0x0000FFFF); |
6378 | pStreamInfo->minFrameSizeInPCMFrames = (drflac_uint32)((frameSizes & (((drflac_uint64)0x00FFFFFF << 16) << 24)) >> 40); |
6379 | pStreamInfo->maxFrameSizeInPCMFrames = (drflac_uint32)((frameSizes & (((drflac_uint64)0x00FFFFFF << 16) << 0)) >> 16); |
6380 | pStreamInfo->sampleRate = (drflac_uint32)((importantProps & (((drflac_uint64)0x000FFFFF << 16) << 28)) >> 44); |
6381 | pStreamInfo->channels = (drflac_uint8 )((importantProps & (((drflac_uint64)0x0000000E << 16) << 24)) >> 41) + 1; |
6382 | pStreamInfo->bitsPerSample = (drflac_uint8 )((importantProps & (((drflac_uint64)0x0000001F << 16) << 20)) >> 36) + 1; |
6383 | pStreamInfo->totalPCMFrameCount = ((importantProps & ((((drflac_uint64)0x0000000F << 16) << 16) | 0xFFFFFFFF))); |
6384 | DRFLAC_COPY_MEMORY(pStreamInfo->md5, md5, sizeof(md5)); |
6385 | |
6386 | return DRFLAC_TRUE; |
6387 | } |
6388 | |
6389 | |
6390 | static void* drflac__malloc_default(size_t sz, void* pUserData) |
6391 | { |
6392 | (void)pUserData; |
6393 | return DRFLAC_MALLOC(sz); |
6394 | } |
6395 | |
6396 | static void* drflac__realloc_default(void* p, size_t sz, void* pUserData) |
6397 | { |
6398 | (void)pUserData; |
6399 | return DRFLAC_REALLOC(p, sz); |
6400 | } |
6401 | |
6402 | static void drflac__free_default(void* p, void* pUserData) |
6403 | { |
6404 | (void)pUserData; |
6405 | DRFLAC_FREE(p); |
6406 | } |
6407 | |
6408 | |
6409 | static void* drflac__malloc_from_callbacks(size_t sz, const drflac_allocation_callbacks* pAllocationCallbacks) |
6410 | { |
6411 | if (pAllocationCallbacks == NULL) { |
6412 | return NULL; |
6413 | } |
6414 | |
6415 | if (pAllocationCallbacks->onMalloc != NULL) { |
6416 | return pAllocationCallbacks->onMalloc(sz, pAllocationCallbacks->pUserData); |
6417 | } |
6418 | |
6419 | /* Try using realloc(). */ |
6420 | if (pAllocationCallbacks->onRealloc != NULL) { |
6421 | return pAllocationCallbacks->onRealloc(NULL, sz, pAllocationCallbacks->pUserData); |
6422 | } |
6423 | |
6424 | return NULL; |
6425 | } |
6426 | |
6427 | static void* drflac__realloc_from_callbacks(void* p, size_t szNew, size_t szOld, const drflac_allocation_callbacks* pAllocationCallbacks) |
6428 | { |
6429 | if (pAllocationCallbacks == NULL) { |
6430 | return NULL; |
6431 | } |
6432 | |
6433 | if (pAllocationCallbacks->onRealloc != NULL) { |
6434 | return pAllocationCallbacks->onRealloc(p, szNew, pAllocationCallbacks->pUserData); |
6435 | } |
6436 | |
6437 | /* Try emulating realloc() in terms of malloc()/free(). */ |
6438 | if (pAllocationCallbacks->onMalloc != NULL && pAllocationCallbacks->onFree != NULL) { |
6439 | void* p2; |
6440 | |
6441 | p2 = pAllocationCallbacks->onMalloc(szNew, pAllocationCallbacks->pUserData); |
6442 | if (p2 == NULL) { |
6443 | return NULL; |
6444 | } |
6445 | |
6446 | if (p != NULL) { |
6447 | DRFLAC_COPY_MEMORY(p2, p, szOld); |
6448 | pAllocationCallbacks->onFree(p, pAllocationCallbacks->pUserData); |
6449 | } |
6450 | |
6451 | return p2; |
6452 | } |
6453 | |
6454 | return NULL; |
6455 | } |
6456 | |
6457 | static void drflac__free_from_callbacks(void* p, const drflac_allocation_callbacks* pAllocationCallbacks) |
6458 | { |
6459 | if (p == NULL || pAllocationCallbacks == NULL) { |
6460 | return; |
6461 | } |
6462 | |
6463 | if (pAllocationCallbacks->onFree != NULL) { |
6464 | pAllocationCallbacks->onFree(p, pAllocationCallbacks->pUserData); |
6465 | } |
6466 | } |
6467 | |
6468 | |
9e052883 |
6469 | 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* pSeekpointCount, drflac_allocation_callbacks* pAllocationCallbacks) |
2ff0b512 |
6470 | { |
6471 | /* |
6472 | 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 |
6473 | we'll be sitting on byte 42. |
6474 | */ |
6475 | drflac_uint64 runningFilePos = 42; |
6476 | drflac_uint64 seektablePos = 0; |
6477 | drflac_uint32 seektableSize = 0; |
6478 | |
6479 | for (;;) { |
6480 | drflac_metadata metadata; |
6481 | drflac_uint8 isLastBlock = 0; |
6482 | drflac_uint8 blockType; |
6483 | drflac_uint32 blockSize; |
6484 | if (drflac__read_and_decode_block_header(onRead, pUserData, &isLastBlock, &blockType, &blockSize) == DRFLAC_FALSE) { |
6485 | return DRFLAC_FALSE; |
6486 | } |
6487 | runningFilePos += 4; |
6488 | |
6489 | metadata.type = blockType; |
6490 | metadata.pRawData = NULL; |
6491 | metadata.rawDataSize = 0; |
6492 | |
6493 | switch (blockType) |
6494 | { |
6495 | case DRFLAC_METADATA_BLOCK_TYPE_APPLICATION: |
6496 | { |
6497 | if (blockSize < 4) { |
6498 | return DRFLAC_FALSE; |
6499 | } |
6500 | |
6501 | if (onMeta) { |
6502 | void* pRawData = drflac__malloc_from_callbacks(blockSize, pAllocationCallbacks); |
6503 | if (pRawData == NULL) { |
6504 | return DRFLAC_FALSE; |
6505 | } |
6506 | |
6507 | if (onRead(pUserData, pRawData, blockSize) != blockSize) { |
6508 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
6509 | return DRFLAC_FALSE; |
6510 | } |
6511 | |
6512 | metadata.pRawData = pRawData; |
6513 | metadata.rawDataSize = blockSize; |
6514 | metadata.data.application.id = drflac__be2host_32(*(drflac_uint32*)pRawData); |
6515 | metadata.data.application.pData = (const void*)((drflac_uint8*)pRawData + sizeof(drflac_uint32)); |
6516 | metadata.data.application.dataSize = blockSize - sizeof(drflac_uint32); |
6517 | onMeta(pUserDataMD, &metadata); |
6518 | |
6519 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
6520 | } |
6521 | } break; |
6522 | |
6523 | case DRFLAC_METADATA_BLOCK_TYPE_SEEKTABLE: |
6524 | { |
6525 | seektablePos = runningFilePos; |
6526 | seektableSize = blockSize; |
6527 | |
6528 | if (onMeta) { |
9e052883 |
6529 | drflac_uint32 seekpointCount; |
2ff0b512 |
6530 | drflac_uint32 iSeekpoint; |
6531 | void* pRawData; |
6532 | |
9e052883 |
6533 | seekpointCount = blockSize/DRFLAC_SEEKPOINT_SIZE_IN_BYTES; |
6534 | |
6535 | pRawData = drflac__malloc_from_callbacks(seekpointCount * sizeof(drflac_seekpoint), pAllocationCallbacks); |
2ff0b512 |
6536 | if (pRawData == NULL) { |
6537 | return DRFLAC_FALSE; |
6538 | } |
6539 | |
9e052883 |
6540 | /* We need to read seekpoint by seekpoint and do some processing. */ |
6541 | for (iSeekpoint = 0; iSeekpoint < seekpointCount; ++iSeekpoint) { |
6542 | drflac_seekpoint* pSeekpoint = (drflac_seekpoint*)pRawData + iSeekpoint; |
2ff0b512 |
6543 | |
9e052883 |
6544 | if (onRead(pUserData, pSeekpoint, DRFLAC_SEEKPOINT_SIZE_IN_BYTES) != DRFLAC_SEEKPOINT_SIZE_IN_BYTES) { |
6545 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
6546 | return DRFLAC_FALSE; |
6547 | } |
2ff0b512 |
6548 | |
9e052883 |
6549 | /* Endian swap. */ |
2ff0b512 |
6550 | pSeekpoint->firstPCMFrame = drflac__be2host_64(pSeekpoint->firstPCMFrame); |
6551 | pSeekpoint->flacFrameOffset = drflac__be2host_64(pSeekpoint->flacFrameOffset); |
6552 | pSeekpoint->pcmFrameCount = drflac__be2host_16(pSeekpoint->pcmFrameCount); |
6553 | } |
6554 | |
9e052883 |
6555 | metadata.pRawData = pRawData; |
6556 | metadata.rawDataSize = blockSize; |
6557 | metadata.data.seektable.seekpointCount = seekpointCount; |
6558 | metadata.data.seektable.pSeekpoints = (const drflac_seekpoint*)pRawData; |
6559 | |
2ff0b512 |
6560 | onMeta(pUserDataMD, &metadata); |
6561 | |
6562 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
6563 | } |
6564 | } break; |
6565 | |
6566 | case DRFLAC_METADATA_BLOCK_TYPE_VORBIS_COMMENT: |
6567 | { |
6568 | if (blockSize < 8) { |
6569 | return DRFLAC_FALSE; |
6570 | } |
6571 | |
6572 | if (onMeta) { |
6573 | void* pRawData; |
6574 | const char* pRunningData; |
6575 | const char* pRunningDataEnd; |
6576 | drflac_uint32 i; |
6577 | |
6578 | pRawData = drflac__malloc_from_callbacks(blockSize, pAllocationCallbacks); |
6579 | if (pRawData == NULL) { |
6580 | return DRFLAC_FALSE; |
6581 | } |
6582 | |
6583 | if (onRead(pUserData, pRawData, blockSize) != blockSize) { |
6584 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
6585 | return DRFLAC_FALSE; |
6586 | } |
6587 | |
6588 | metadata.pRawData = pRawData; |
6589 | metadata.rawDataSize = blockSize; |
6590 | |
6591 | pRunningData = (const char*)pRawData; |
6592 | pRunningDataEnd = (const char*)pRawData + blockSize; |
6593 | |
9e052883 |
6594 | metadata.data.vorbis_comment.vendorLength = drflac__le2host_32_ptr_unaligned(pRunningData); pRunningData += 4; |
2ff0b512 |
6595 | |
6596 | /* Need space for the rest of the block */ |
6597 | if ((pRunningDataEnd - pRunningData) - 4 < (drflac_int64)metadata.data.vorbis_comment.vendorLength) { /* <-- Note the order of operations to avoid overflow to a valid value */ |
6598 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
6599 | return DRFLAC_FALSE; |
6600 | } |
6601 | metadata.data.vorbis_comment.vendor = pRunningData; pRunningData += metadata.data.vorbis_comment.vendorLength; |
9e052883 |
6602 | metadata.data.vorbis_comment.commentCount = drflac__le2host_32_ptr_unaligned(pRunningData); pRunningData += 4; |
2ff0b512 |
6603 | |
6604 | /* Need space for 'commentCount' comments after the block, which at minimum is a drflac_uint32 per comment */ |
6605 | if ((pRunningDataEnd - pRunningData) / sizeof(drflac_uint32) < metadata.data.vorbis_comment.commentCount) { /* <-- Note the order of operations to avoid overflow to a valid value */ |
6606 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
6607 | return DRFLAC_FALSE; |
6608 | } |
6609 | metadata.data.vorbis_comment.pComments = pRunningData; |
6610 | |
6611 | /* Check that the comments section is valid before passing it to the callback */ |
6612 | for (i = 0; i < metadata.data.vorbis_comment.commentCount; ++i) { |
6613 | drflac_uint32 commentLength; |
6614 | |
6615 | if (pRunningDataEnd - pRunningData < 4) { |
6616 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
6617 | return DRFLAC_FALSE; |
6618 | } |
6619 | |
9e052883 |
6620 | commentLength = drflac__le2host_32_ptr_unaligned(pRunningData); pRunningData += 4; |
2ff0b512 |
6621 | if (pRunningDataEnd - pRunningData < (drflac_int64)commentLength) { /* <-- Note the order of operations to avoid overflow to a valid value */ |
6622 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
6623 | return DRFLAC_FALSE; |
6624 | } |
6625 | pRunningData += commentLength; |
6626 | } |
6627 | |
6628 | onMeta(pUserDataMD, &metadata); |
6629 | |
6630 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
6631 | } |
6632 | } break; |
6633 | |
6634 | case DRFLAC_METADATA_BLOCK_TYPE_CUESHEET: |
6635 | { |
6636 | if (blockSize < 396) { |
6637 | return DRFLAC_FALSE; |
6638 | } |
6639 | |
6640 | if (onMeta) { |
6641 | void* pRawData; |
6642 | const char* pRunningData; |
6643 | const char* pRunningDataEnd; |
9e052883 |
6644 | size_t bufferSize; |
2ff0b512 |
6645 | drflac_uint8 iTrack; |
6646 | drflac_uint8 iIndex; |
9e052883 |
6647 | void* pTrackData; |
2ff0b512 |
6648 | |
9e052883 |
6649 | /* |
6650 | This needs to be loaded in two passes. The first pass is used to calculate the size of the memory allocation |
6651 | we need for storing the necessary data. The second pass will fill that buffer with usable data. |
6652 | */ |
2ff0b512 |
6653 | pRawData = drflac__malloc_from_callbacks(blockSize, pAllocationCallbacks); |
6654 | if (pRawData == NULL) { |
6655 | return DRFLAC_FALSE; |
6656 | } |
6657 | |
6658 | if (onRead(pUserData, pRawData, blockSize) != blockSize) { |
6659 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
6660 | return DRFLAC_FALSE; |
6661 | } |
6662 | |
6663 | metadata.pRawData = pRawData; |
6664 | metadata.rawDataSize = blockSize; |
6665 | |
6666 | pRunningData = (const char*)pRawData; |
6667 | pRunningDataEnd = (const char*)pRawData + blockSize; |
6668 | |
6669 | DRFLAC_COPY_MEMORY(metadata.data.cuesheet.catalog, pRunningData, 128); pRunningData += 128; |
6670 | metadata.data.cuesheet.leadInSampleCount = drflac__be2host_64(*(const drflac_uint64*)pRunningData); pRunningData += 8; |
6671 | metadata.data.cuesheet.isCD = (pRunningData[0] & 0x80) != 0; pRunningData += 259; |
6672 | metadata.data.cuesheet.trackCount = pRunningData[0]; pRunningData += 1; |
9e052883 |
6673 | metadata.data.cuesheet.pTrackData = NULL; /* Will be filled later. */ |
6674 | |
6675 | /* Pass 1: Calculate the size of the buffer for the track data. */ |
6676 | { |
6677 | const char* pRunningDataSaved = pRunningData; /* Will be restored at the end in preparation for the second pass. */ |
2ff0b512 |
6678 | |
9e052883 |
6679 | bufferSize = metadata.data.cuesheet.trackCount * DRFLAC_CUESHEET_TRACK_SIZE_IN_BYTES; |
2ff0b512 |
6680 | |
9e052883 |
6681 | for (iTrack = 0; iTrack < metadata.data.cuesheet.trackCount; ++iTrack) { |
6682 | drflac_uint8 indexCount; |
6683 | drflac_uint32 indexPointSize; |
6684 | |
6685 | if (pRunningDataEnd - pRunningData < DRFLAC_CUESHEET_TRACK_SIZE_IN_BYTES) { |
6686 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
6687 | return DRFLAC_FALSE; |
6688 | } |
6689 | |
6690 | /* Skip to the index point count */ |
6691 | pRunningData += 35; |
6692 | |
6693 | indexCount = pRunningData[0]; |
6694 | pRunningData += 1; |
6695 | |
6696 | bufferSize += indexCount * sizeof(drflac_cuesheet_track_index); |
6697 | |
6698 | /* Quick validation check. */ |
6699 | indexPointSize = indexCount * DRFLAC_CUESHEET_TRACK_INDEX_SIZE_IN_BYTES; |
6700 | if (pRunningDataEnd - pRunningData < (drflac_int64)indexPointSize) { |
6701 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
6702 | return DRFLAC_FALSE; |
6703 | } |
6704 | |
6705 | pRunningData += indexPointSize; |
2ff0b512 |
6706 | } |
6707 | |
9e052883 |
6708 | pRunningData = pRunningDataSaved; |
6709 | } |
6710 | |
6711 | /* Pass 2: Allocate a buffer and fill the data. Validation was done in the step above so can be skipped. */ |
6712 | { |
6713 | char* pRunningTrackData; |
6714 | |
6715 | pTrackData = drflac__malloc_from_callbacks(bufferSize, pAllocationCallbacks); |
6716 | if (pTrackData == NULL) { |
2ff0b512 |
6717 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
6718 | return DRFLAC_FALSE; |
6719 | } |
6720 | |
9e052883 |
6721 | pRunningTrackData = (char*)pTrackData; |
6722 | |
6723 | for (iTrack = 0; iTrack < metadata.data.cuesheet.trackCount; ++iTrack) { |
6724 | drflac_uint8 indexCount; |
6725 | |
6726 | DRFLAC_COPY_MEMORY(pRunningTrackData, pRunningData, DRFLAC_CUESHEET_TRACK_SIZE_IN_BYTES); |
6727 | pRunningData += DRFLAC_CUESHEET_TRACK_SIZE_IN_BYTES-1; /* Skip forward, but not beyond the last byte in the CUESHEET_TRACK block which is the index count. */ |
6728 | pRunningTrackData += DRFLAC_CUESHEET_TRACK_SIZE_IN_BYTES-1; |
6729 | |
6730 | /* Grab the index count for the next part. */ |
6731 | indexCount = pRunningData[0]; |
6732 | pRunningData += 1; |
6733 | pRunningTrackData += 1; |
6734 | |
6735 | /* Extract each track index. */ |
6736 | for (iIndex = 0; iIndex < indexCount; ++iIndex) { |
6737 | drflac_cuesheet_track_index* pTrackIndex = (drflac_cuesheet_track_index*)pRunningTrackData; |
6738 | |
6739 | DRFLAC_COPY_MEMORY(pRunningTrackData, pRunningData, DRFLAC_CUESHEET_TRACK_INDEX_SIZE_IN_BYTES); |
6740 | pRunningData += DRFLAC_CUESHEET_TRACK_INDEX_SIZE_IN_BYTES; |
6741 | pRunningTrackData += sizeof(drflac_cuesheet_track_index); |
6742 | |
6743 | pTrackIndex->offset = drflac__be2host_64(pTrackIndex->offset); |
6744 | } |
2ff0b512 |
6745 | } |
9e052883 |
6746 | |
6747 | metadata.data.cuesheet.pTrackData = pTrackData; |
2ff0b512 |
6748 | } |
6749 | |
9e052883 |
6750 | /* The original data is no longer needed. */ |
6751 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
6752 | pRawData = NULL; |
6753 | |
2ff0b512 |
6754 | onMeta(pUserDataMD, &metadata); |
6755 | |
9e052883 |
6756 | drflac__free_from_callbacks(pTrackData, pAllocationCallbacks); |
6757 | pTrackData = NULL; |
2ff0b512 |
6758 | } |
6759 | } break; |
6760 | |
6761 | case DRFLAC_METADATA_BLOCK_TYPE_PICTURE: |
6762 | { |
6763 | if (blockSize < 32) { |
6764 | return DRFLAC_FALSE; |
6765 | } |
6766 | |
6767 | if (onMeta) { |
6768 | void* pRawData; |
6769 | const char* pRunningData; |
6770 | const char* pRunningDataEnd; |
6771 | |
6772 | pRawData = drflac__malloc_from_callbacks(blockSize, pAllocationCallbacks); |
6773 | if (pRawData == NULL) { |
6774 | return DRFLAC_FALSE; |
6775 | } |
6776 | |
6777 | if (onRead(pUserData, pRawData, blockSize) != blockSize) { |
6778 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
6779 | return DRFLAC_FALSE; |
6780 | } |
6781 | |
6782 | metadata.pRawData = pRawData; |
6783 | metadata.rawDataSize = blockSize; |
6784 | |
6785 | pRunningData = (const char*)pRawData; |
6786 | pRunningDataEnd = (const char*)pRawData + blockSize; |
6787 | |
9e052883 |
6788 | metadata.data.picture.type = drflac__be2host_32_ptr_unaligned(pRunningData); pRunningData += 4; |
6789 | metadata.data.picture.mimeLength = drflac__be2host_32_ptr_unaligned(pRunningData); pRunningData += 4; |
2ff0b512 |
6790 | |
6791 | /* Need space for the rest of the block */ |
6792 | if ((pRunningDataEnd - pRunningData) - 24 < (drflac_int64)metadata.data.picture.mimeLength) { /* <-- Note the order of operations to avoid overflow to a valid value */ |
6793 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
6794 | return DRFLAC_FALSE; |
6795 | } |
9e052883 |
6796 | metadata.data.picture.mime = pRunningData; pRunningData += metadata.data.picture.mimeLength; |
6797 | metadata.data.picture.descriptionLength = drflac__be2host_32_ptr_unaligned(pRunningData); pRunningData += 4; |
2ff0b512 |
6798 | |
6799 | /* Need space for the rest of the block */ |
6800 | if ((pRunningDataEnd - pRunningData) - 20 < (drflac_int64)metadata.data.picture.descriptionLength) { /* <-- Note the order of operations to avoid overflow to a valid value */ |
6801 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
6802 | return DRFLAC_FALSE; |
6803 | } |
9e052883 |
6804 | metadata.data.picture.description = pRunningData; pRunningData += metadata.data.picture.descriptionLength; |
6805 | metadata.data.picture.width = drflac__be2host_32_ptr_unaligned(pRunningData); pRunningData += 4; |
6806 | metadata.data.picture.height = drflac__be2host_32_ptr_unaligned(pRunningData); pRunningData += 4; |
6807 | metadata.data.picture.colorDepth = drflac__be2host_32_ptr_unaligned(pRunningData); pRunningData += 4; |
6808 | metadata.data.picture.indexColorCount = drflac__be2host_32_ptr_unaligned(pRunningData); pRunningData += 4; |
6809 | metadata.data.picture.pictureDataSize = drflac__be2host_32_ptr_unaligned(pRunningData); pRunningData += 4; |
2ff0b512 |
6810 | metadata.data.picture.pPictureData = (const drflac_uint8*)pRunningData; |
6811 | |
6812 | /* Need space for the picture after the block */ |
6813 | if (pRunningDataEnd - pRunningData < (drflac_int64)metadata.data.picture.pictureDataSize) { /* <-- Note the order of operations to avoid overflow to a valid value */ |
6814 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
6815 | return DRFLAC_FALSE; |
6816 | } |
6817 | |
6818 | onMeta(pUserDataMD, &metadata); |
6819 | |
6820 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
6821 | } |
6822 | } break; |
6823 | |
6824 | case DRFLAC_METADATA_BLOCK_TYPE_PADDING: |
6825 | { |
6826 | if (onMeta) { |
6827 | metadata.data.padding.unused = 0; |
6828 | |
6829 | /* 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. */ |
6830 | if (!onSeek(pUserData, blockSize, drflac_seek_origin_current)) { |
6831 | 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. */ |
6832 | } else { |
6833 | onMeta(pUserDataMD, &metadata); |
6834 | } |
6835 | } |
6836 | } break; |
6837 | |
6838 | case DRFLAC_METADATA_BLOCK_TYPE_INVALID: |
6839 | { |
6840 | /* Invalid chunk. Just skip over this one. */ |
6841 | if (onMeta) { |
6842 | if (!onSeek(pUserData, blockSize, drflac_seek_origin_current)) { |
6843 | 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. */ |
6844 | } |
6845 | } |
6846 | } break; |
6847 | |
6848 | default: |
6849 | { |
6850 | /* |
6851 | It's an unknown chunk, but not necessarily invalid. There's a chance more metadata blocks might be defined later on, so we |
6852 | can at the very least report the chunk to the application and let it look at the raw data. |
6853 | */ |
6854 | if (onMeta) { |
6855 | void* pRawData = drflac__malloc_from_callbacks(blockSize, pAllocationCallbacks); |
6856 | if (pRawData == NULL) { |
6857 | return DRFLAC_FALSE; |
6858 | } |
6859 | |
6860 | if (onRead(pUserData, pRawData, blockSize) != blockSize) { |
6861 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
6862 | return DRFLAC_FALSE; |
6863 | } |
6864 | |
6865 | metadata.pRawData = pRawData; |
6866 | metadata.rawDataSize = blockSize; |
6867 | onMeta(pUserDataMD, &metadata); |
6868 | |
6869 | drflac__free_from_callbacks(pRawData, pAllocationCallbacks); |
6870 | } |
6871 | } break; |
6872 | } |
6873 | |
6874 | /* 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. */ |
6875 | if (onMeta == NULL && blockSize > 0) { |
6876 | if (!onSeek(pUserData, blockSize, drflac_seek_origin_current)) { |
6877 | isLastBlock = DRFLAC_TRUE; |
6878 | } |
6879 | } |
6880 | |
6881 | runningFilePos += blockSize; |
6882 | if (isLastBlock) { |
6883 | break; |
6884 | } |
6885 | } |
6886 | |
9e052883 |
6887 | *pSeektablePos = seektablePos; |
6888 | *pSeekpointCount = seektableSize / DRFLAC_SEEKPOINT_SIZE_IN_BYTES; |
6889 | *pFirstFramePos = runningFilePos; |
2ff0b512 |
6890 | |
6891 | return DRFLAC_TRUE; |
6892 | } |
6893 | |
6894 | 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) |
6895 | { |
6896 | /* Pre Condition: The bit stream should be sitting just past the 4-byte id header. */ |
6897 | |
6898 | drflac_uint8 isLastBlock; |
6899 | drflac_uint8 blockType; |
6900 | drflac_uint32 blockSize; |
6901 | |
6902 | (void)onSeek; |
6903 | |
6904 | pInit->container = drflac_container_native; |
6905 | |
6906 | /* The first metadata block should be the STREAMINFO block. */ |
6907 | if (!drflac__read_and_decode_block_header(onRead, pUserData, &isLastBlock, &blockType, &blockSize)) { |
6908 | return DRFLAC_FALSE; |
6909 | } |
6910 | |
6911 | if (blockType != DRFLAC_METADATA_BLOCK_TYPE_STREAMINFO || blockSize != 34) { |
6912 | if (!relaxed) { |
6913 | /* We're opening in strict mode and the first block is not the STREAMINFO block. Error. */ |
6914 | return DRFLAC_FALSE; |
6915 | } else { |
6916 | /* |
6917 | Relaxed mode. To open from here we need to just find the first frame and set the sample rate, etc. to whatever is defined |
6918 | for that frame. |
6919 | */ |
6920 | pInit->hasStreamInfoBlock = DRFLAC_FALSE; |
6921 | pInit->hasMetadataBlocks = DRFLAC_FALSE; |
6922 | |
6923 | if (!drflac__read_next_flac_frame_header(&pInit->bs, 0, &pInit->firstFrameHeader)) { |
6924 | return DRFLAC_FALSE; /* Couldn't find a frame. */ |
6925 | } |
6926 | |
6927 | if (pInit->firstFrameHeader.bitsPerSample == 0) { |
6928 | return DRFLAC_FALSE; /* Failed to initialize because the first frame depends on the STREAMINFO block, which does not exist. */ |
6929 | } |
6930 | |
6931 | pInit->sampleRate = pInit->firstFrameHeader.sampleRate; |
6932 | pInit->channels = drflac__get_channel_count_from_channel_assignment(pInit->firstFrameHeader.channelAssignment); |
6933 | pInit->bitsPerSample = pInit->firstFrameHeader.bitsPerSample; |
6934 | pInit->maxBlockSizeInPCMFrames = 65535; /* <-- See notes here: https://xiph.org/flac/format.html#metadata_block_streaminfo */ |
6935 | return DRFLAC_TRUE; |
6936 | } |
6937 | } else { |
6938 | drflac_streaminfo streaminfo; |
6939 | if (!drflac__read_streaminfo(onRead, pUserData, &streaminfo)) { |
6940 | return DRFLAC_FALSE; |
6941 | } |
6942 | |
6943 | pInit->hasStreamInfoBlock = DRFLAC_TRUE; |
6944 | pInit->sampleRate = streaminfo.sampleRate; |
6945 | pInit->channels = streaminfo.channels; |
6946 | pInit->bitsPerSample = streaminfo.bitsPerSample; |
6947 | pInit->totalPCMFrameCount = streaminfo.totalPCMFrameCount; |
6948 | pInit->maxBlockSizeInPCMFrames = streaminfo.maxBlockSizeInPCMFrames; /* Don't care about the min block size - only the max (used for determining the size of the memory allocation). */ |
6949 | pInit->hasMetadataBlocks = !isLastBlock; |
6950 | |
6951 | if (onMeta) { |
6952 | drflac_metadata metadata; |
6953 | metadata.type = DRFLAC_METADATA_BLOCK_TYPE_STREAMINFO; |
6954 | metadata.pRawData = NULL; |
6955 | metadata.rawDataSize = 0; |
6956 | metadata.data.streaminfo = streaminfo; |
6957 | onMeta(pUserDataMD, &metadata); |
6958 | } |
6959 | |
6960 | return DRFLAC_TRUE; |
6961 | } |
6962 | } |
6963 | |
6964 | #ifndef DR_FLAC_NO_OGG |
6965 | #define DRFLAC_OGG_MAX_PAGE_SIZE 65307 |
6966 | #define DRFLAC_OGG_CAPTURE_PATTERN_CRC32 1605413199 /* CRC-32 of "OggS". */ |
6967 | |
6968 | typedef enum |
6969 | { |
6970 | drflac_ogg_recover_on_crc_mismatch, |
6971 | drflac_ogg_fail_on_crc_mismatch |
6972 | } drflac_ogg_crc_mismatch_recovery; |
6973 | |
6974 | #ifndef DR_FLAC_NO_CRC |
6975 | static drflac_uint32 drflac__crc32_table[] = { |
6976 | 0x00000000L, 0x04C11DB7L, 0x09823B6EL, 0x0D4326D9L, |
6977 | 0x130476DCL, 0x17C56B6BL, 0x1A864DB2L, 0x1E475005L, |
6978 | 0x2608EDB8L, 0x22C9F00FL, 0x2F8AD6D6L, 0x2B4BCB61L, |
6979 | 0x350C9B64L, 0x31CD86D3L, 0x3C8EA00AL, 0x384FBDBDL, |
6980 | 0x4C11DB70L, 0x48D0C6C7L, 0x4593E01EL, 0x4152FDA9L, |
6981 | 0x5F15ADACL, 0x5BD4B01BL, 0x569796C2L, 0x52568B75L, |
6982 | 0x6A1936C8L, 0x6ED82B7FL, 0x639B0DA6L, 0x675A1011L, |
6983 | 0x791D4014L, 0x7DDC5DA3L, 0x709F7B7AL, 0x745E66CDL, |
6984 | 0x9823B6E0L, 0x9CE2AB57L, 0x91A18D8EL, 0x95609039L, |
6985 | 0x8B27C03CL, 0x8FE6DD8BL, 0x82A5FB52L, 0x8664E6E5L, |
6986 | 0xBE2B5B58L, 0xBAEA46EFL, 0xB7A96036L, 0xB3687D81L, |
6987 | 0xAD2F2D84L, 0xA9EE3033L, 0xA4AD16EAL, 0xA06C0B5DL, |
6988 | 0xD4326D90L, 0xD0F37027L, 0xDDB056FEL, 0xD9714B49L, |
6989 | 0xC7361B4CL, 0xC3F706FBL, 0xCEB42022L, 0xCA753D95L, |
6990 | 0xF23A8028L, 0xF6FB9D9FL, 0xFBB8BB46L, 0xFF79A6F1L, |
6991 | 0xE13EF6F4L, 0xE5FFEB43L, 0xE8BCCD9AL, 0xEC7DD02DL, |
6992 | 0x34867077L, 0x30476DC0L, 0x3D044B19L, 0x39C556AEL, |
6993 | 0x278206ABL, 0x23431B1CL, 0x2E003DC5L, 0x2AC12072L, |
6994 | 0x128E9DCFL, 0x164F8078L, 0x1B0CA6A1L, 0x1FCDBB16L, |
6995 | 0x018AEB13L, 0x054BF6A4L, 0x0808D07DL, 0x0CC9CDCAL, |
6996 | 0x7897AB07L, 0x7C56B6B0L, 0x71159069L, 0x75D48DDEL, |
6997 | 0x6B93DDDBL, 0x6F52C06CL, 0x6211E6B5L, 0x66D0FB02L, |
6998 | 0x5E9F46BFL, 0x5A5E5B08L, 0x571D7DD1L, 0x53DC6066L, |
6999 | 0x4D9B3063L, 0x495A2DD4L, 0x44190B0DL, 0x40D816BAL, |
7000 | 0xACA5C697L, 0xA864DB20L, 0xA527FDF9L, 0xA1E6E04EL, |
7001 | 0xBFA1B04BL, 0xBB60ADFCL, 0xB6238B25L, 0xB2E29692L, |
7002 | 0x8AAD2B2FL, 0x8E6C3698L, 0x832F1041L, 0x87EE0DF6L, |
7003 | 0x99A95DF3L, 0x9D684044L, 0x902B669DL, 0x94EA7B2AL, |
7004 | 0xE0B41DE7L, 0xE4750050L, 0xE9362689L, 0xEDF73B3EL, |
7005 | 0xF3B06B3BL, 0xF771768CL, 0xFA325055L, 0xFEF34DE2L, |
7006 | 0xC6BCF05FL, 0xC27DEDE8L, 0xCF3ECB31L, 0xCBFFD686L, |
7007 | 0xD5B88683L, 0xD1799B34L, 0xDC3ABDEDL, 0xD8FBA05AL, |
7008 | 0x690CE0EEL, 0x6DCDFD59L, 0x608EDB80L, 0x644FC637L, |
7009 | 0x7A089632L, 0x7EC98B85L, 0x738AAD5CL, 0x774BB0EBL, |
7010 | 0x4F040D56L, 0x4BC510E1L, 0x46863638L, 0x42472B8FL, |
7011 | 0x5C007B8AL, 0x58C1663DL, 0x558240E4L, 0x51435D53L, |
7012 | 0x251D3B9EL, 0x21DC2629L, 0x2C9F00F0L, 0x285E1D47L, |
7013 | 0x36194D42L, 0x32D850F5L, 0x3F9B762CL, 0x3B5A6B9BL, |
7014 | 0x0315D626L, 0x07D4CB91L, 0x0A97ED48L, 0x0E56F0FFL, |
7015 | 0x1011A0FAL, 0x14D0BD4DL, 0x19939B94L, 0x1D528623L, |
7016 | 0xF12F560EL, 0xF5EE4BB9L, 0xF8AD6D60L, 0xFC6C70D7L, |
7017 | 0xE22B20D2L, 0xE6EA3D65L, 0xEBA91BBCL, 0xEF68060BL, |
7018 | 0xD727BBB6L, 0xD3E6A601L, 0xDEA580D8L, 0xDA649D6FL, |
7019 | 0xC423CD6AL, 0xC0E2D0DDL, 0xCDA1F604L, 0xC960EBB3L, |
7020 | 0xBD3E8D7EL, 0xB9FF90C9L, 0xB4BCB610L, 0xB07DABA7L, |
7021 | 0xAE3AFBA2L, 0xAAFBE615L, 0xA7B8C0CCL, 0xA379DD7BL, |
7022 | 0x9B3660C6L, 0x9FF77D71L, 0x92B45BA8L, 0x9675461FL, |
7023 | 0x8832161AL, 0x8CF30BADL, 0x81B02D74L, 0x857130C3L, |
7024 | 0x5D8A9099L, 0x594B8D2EL, 0x5408ABF7L, 0x50C9B640L, |
7025 | 0x4E8EE645L, 0x4A4FFBF2L, 0x470CDD2BL, 0x43CDC09CL, |
7026 | 0x7B827D21L, 0x7F436096L, 0x7200464FL, 0x76C15BF8L, |
7027 | 0x68860BFDL, 0x6C47164AL, 0x61043093L, 0x65C52D24L, |
7028 | 0x119B4BE9L, 0x155A565EL, 0x18197087L, 0x1CD86D30L, |
7029 | 0x029F3D35L, 0x065E2082L, 0x0B1D065BL, 0x0FDC1BECL, |
7030 | 0x3793A651L, 0x3352BBE6L, 0x3E119D3FL, 0x3AD08088L, |
7031 | 0x2497D08DL, 0x2056CD3AL, 0x2D15EBE3L, 0x29D4F654L, |
7032 | 0xC5A92679L, 0xC1683BCEL, 0xCC2B1D17L, 0xC8EA00A0L, |
7033 | 0xD6AD50A5L, 0xD26C4D12L, 0xDF2F6BCBL, 0xDBEE767CL, |
7034 | 0xE3A1CBC1L, 0xE760D676L, 0xEA23F0AFL, 0xEEE2ED18L, |
7035 | 0xF0A5BD1DL, 0xF464A0AAL, 0xF9278673L, 0xFDE69BC4L, |
7036 | 0x89B8FD09L, 0x8D79E0BEL, 0x803AC667L, 0x84FBDBD0L, |
7037 | 0x9ABC8BD5L, 0x9E7D9662L, 0x933EB0BBL, 0x97FFAD0CL, |
7038 | 0xAFB010B1L, 0xAB710D06L, 0xA6322BDFL, 0xA2F33668L, |
7039 | 0xBCB4666DL, 0xB8757BDAL, 0xB5365D03L, 0xB1F740B4L |
7040 | }; |
7041 | #endif |
7042 | |
7043 | static DRFLAC_INLINE drflac_uint32 drflac_crc32_byte(drflac_uint32 crc32, drflac_uint8 data) |
7044 | { |
7045 | #ifndef DR_FLAC_NO_CRC |
7046 | return (crc32 << 8) ^ drflac__crc32_table[(drflac_uint8)((crc32 >> 24) & 0xFF) ^ data]; |
7047 | #else |
7048 | (void)data; |
7049 | return crc32; |
7050 | #endif |
7051 | } |
7052 | |
9e052883 |
7053 | #if 0 |
7054 | static DRFLAC_INLINE drflac_uint32 drflac_crc32_uint32(drflac_uint32 crc32, drflac_uint32 data) |
7055 | { |
7056 | crc32 = drflac_crc32_byte(crc32, (drflac_uint8)((data >> 24) & 0xFF)); |
7057 | crc32 = drflac_crc32_byte(crc32, (drflac_uint8)((data >> 16) & 0xFF)); |
7058 | crc32 = drflac_crc32_byte(crc32, (drflac_uint8)((data >> 8) & 0xFF)); |
7059 | crc32 = drflac_crc32_byte(crc32, (drflac_uint8)((data >> 0) & 0xFF)); |
7060 | return crc32; |
7061 | } |
7062 | |
7063 | static DRFLAC_INLINE drflac_uint32 drflac_crc32_uint64(drflac_uint32 crc32, drflac_uint64 data) |
7064 | { |
7065 | crc32 = drflac_crc32_uint32(crc32, (drflac_uint32)((data >> 32) & 0xFFFFFFFF)); |
7066 | crc32 = drflac_crc32_uint32(crc32, (drflac_uint32)((data >> 0) & 0xFFFFFFFF)); |
7067 | return crc32; |
7068 | } |
7069 | #endif |
7070 | |
2ff0b512 |
7071 | static DRFLAC_INLINE drflac_uint32 drflac_crc32_buffer(drflac_uint32 crc32, drflac_uint8* pData, drflac_uint32 dataSize) |
7072 | { |
7073 | /* This can be optimized. */ |
7074 | drflac_uint32 i; |
7075 | for (i = 0; i < dataSize; ++i) { |
7076 | crc32 = drflac_crc32_byte(crc32, pData[i]); |
7077 | } |
7078 | return crc32; |
7079 | } |
7080 | |
7081 | |
7082 | static DRFLAC_INLINE drflac_bool32 drflac_ogg__is_capture_pattern(drflac_uint8 pattern[4]) |
7083 | { |
7084 | return pattern[0] == 'O' && pattern[1] == 'g' && pattern[2] == 'g' && pattern[3] == 'S'; |
7085 | } |
7086 | |
7087 | static DRFLAC_INLINE drflac_uint32 drflac_ogg__get_page_header_size(drflac_ogg_page_header* pHeader) |
7088 | { |
7089 | return 27 + pHeader->segmentCount; |
7090 | } |
7091 | |
7092 | static DRFLAC_INLINE drflac_uint32 drflac_ogg__get_page_body_size(drflac_ogg_page_header* pHeader) |
7093 | { |
7094 | drflac_uint32 pageBodySize = 0; |
7095 | int i; |
7096 | |
7097 | for (i = 0; i < pHeader->segmentCount; ++i) { |
7098 | pageBodySize += pHeader->segmentTable[i]; |
7099 | } |
7100 | |
7101 | return pageBodySize; |
7102 | } |
7103 | |
7104 | 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) |
7105 | { |
7106 | drflac_uint8 data[23]; |
7107 | drflac_uint32 i; |
7108 | |
7109 | DRFLAC_ASSERT(*pCRC32 == DRFLAC_OGG_CAPTURE_PATTERN_CRC32); |
7110 | |
7111 | if (onRead(pUserData, data, 23) != 23) { |
7112 | return DRFLAC_AT_END; |
7113 | } |
7114 | *pBytesRead += 23; |
7115 | |
7116 | /* |
7117 | It's not actually used, but set the capture pattern to 'OggS' for completeness. Not doing this will cause static analysers to complain about |
7118 | us trying to access uninitialized data. We could alternatively just comment out this member of the drflac_ogg_page_header structure, but I |
7119 | like to have it map to the structure of the underlying data. |
7120 | */ |
7121 | pHeader->capturePattern[0] = 'O'; |
7122 | pHeader->capturePattern[1] = 'g'; |
7123 | pHeader->capturePattern[2] = 'g'; |
7124 | pHeader->capturePattern[3] = 'S'; |
7125 | |
7126 | pHeader->structureVersion = data[0]; |
7127 | pHeader->headerType = data[1]; |
7128 | DRFLAC_COPY_MEMORY(&pHeader->granulePosition, &data[ 2], 8); |
7129 | DRFLAC_COPY_MEMORY(&pHeader->serialNumber, &data[10], 4); |
7130 | DRFLAC_COPY_MEMORY(&pHeader->sequenceNumber, &data[14], 4); |
7131 | DRFLAC_COPY_MEMORY(&pHeader->checksum, &data[18], 4); |
7132 | pHeader->segmentCount = data[22]; |
7133 | |
7134 | /* Calculate the CRC. Note that for the calculation the checksum part of the page needs to be set to 0. */ |
7135 | data[18] = 0; |
7136 | data[19] = 0; |
7137 | data[20] = 0; |
7138 | data[21] = 0; |
7139 | |
7140 | for (i = 0; i < 23; ++i) { |
7141 | *pCRC32 = drflac_crc32_byte(*pCRC32, data[i]); |
7142 | } |
7143 | |
7144 | |
7145 | if (onRead(pUserData, pHeader->segmentTable, pHeader->segmentCount) != pHeader->segmentCount) { |
7146 | return DRFLAC_AT_END; |
7147 | } |
7148 | *pBytesRead += pHeader->segmentCount; |
7149 | |
7150 | for (i = 0; i < pHeader->segmentCount; ++i) { |
7151 | *pCRC32 = drflac_crc32_byte(*pCRC32, pHeader->segmentTable[i]); |
7152 | } |
7153 | |
7154 | return DRFLAC_SUCCESS; |
7155 | } |
7156 | |
7157 | 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) |
7158 | { |
7159 | drflac_uint8 id[4]; |
7160 | |
7161 | *pBytesRead = 0; |
7162 | |
7163 | if (onRead(pUserData, id, 4) != 4) { |
7164 | return DRFLAC_AT_END; |
7165 | } |
7166 | *pBytesRead += 4; |
7167 | |
7168 | /* We need to read byte-by-byte until we find the OggS capture pattern. */ |
7169 | for (;;) { |
7170 | if (drflac_ogg__is_capture_pattern(id)) { |
7171 | drflac_result result; |
7172 | |
7173 | *pCRC32 = DRFLAC_OGG_CAPTURE_PATTERN_CRC32; |
7174 | |
7175 | result = drflac_ogg__read_page_header_after_capture_pattern(onRead, pUserData, pHeader, pBytesRead, pCRC32); |
7176 | if (result == DRFLAC_SUCCESS) { |
7177 | return DRFLAC_SUCCESS; |
7178 | } else { |
7179 | if (result == DRFLAC_CRC_MISMATCH) { |
7180 | continue; |
7181 | } else { |
7182 | return result; |
7183 | } |
7184 | } |
7185 | } else { |
7186 | /* The first 4 bytes did not equal the capture pattern. Read the next byte and try again. */ |
7187 | id[0] = id[1]; |
7188 | id[1] = id[2]; |
7189 | id[2] = id[3]; |
7190 | if (onRead(pUserData, &id[3], 1) != 1) { |
7191 | return DRFLAC_AT_END; |
7192 | } |
7193 | *pBytesRead += 1; |
7194 | } |
7195 | } |
7196 | } |
7197 | |
7198 | |
7199 | /* |
7200 | The main part of the Ogg encapsulation is the conversion from the physical Ogg bitstream to the native FLAC bitstream. It works |
7201 | in three general stages: Ogg Physical Bitstream -> Ogg/FLAC Logical Bitstream -> FLAC Native Bitstream. dr_flac is designed |
7202 | in such a way that the core sections assume everything is delivered in native format. Therefore, for each encapsulation type |
7203 | 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 |
7204 | the physical Ogg bitstream are converted and delivered in native FLAC format. |
7205 | */ |
7206 | typedef struct |
7207 | { |
7208 | drflac_read_proc onRead; /* The original onRead callback from drflac_open() and family. */ |
7209 | drflac_seek_proc onSeek; /* The original onSeek callback from drflac_open() and family. */ |
7210 | void* pUserData; /* The user data passed on onRead and onSeek. This is the user data that was passed on drflac_open() and family. */ |
7211 | drflac_uint64 currentBytePos; /* The position of the byte we are sitting on in the physical byte stream. Used for efficient seeking. */ |
7212 | 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. */ |
7213 | drflac_uint32 serialNumber; /* The serial number of the FLAC audio pages. This is determined by the initial header page that was read during initialization. */ |
7214 | drflac_ogg_page_header bosPageHeader; /* Used for seeking. */ |
7215 | drflac_ogg_page_header currentPageHeader; |
7216 | drflac_uint32 bytesRemainingInPage; |
7217 | drflac_uint32 pageDataSize; |
7218 | drflac_uint8 pageData[DRFLAC_OGG_MAX_PAGE_SIZE]; |
7219 | } drflac_oggbs; /* oggbs = Ogg Bitstream */ |
7220 | |
7221 | static size_t drflac_oggbs__read_physical(drflac_oggbs* oggbs, void* bufferOut, size_t bytesToRead) |
7222 | { |
7223 | size_t bytesActuallyRead = oggbs->onRead(oggbs->pUserData, bufferOut, bytesToRead); |
7224 | oggbs->currentBytePos += bytesActuallyRead; |
7225 | |
7226 | return bytesActuallyRead; |
7227 | } |
7228 | |
7229 | static drflac_bool32 drflac_oggbs__seek_physical(drflac_oggbs* oggbs, drflac_uint64 offset, drflac_seek_origin origin) |
7230 | { |
7231 | if (origin == drflac_seek_origin_start) { |
7232 | if (offset <= 0x7FFFFFFF) { |
7233 | if (!oggbs->onSeek(oggbs->pUserData, (int)offset, drflac_seek_origin_start)) { |
7234 | return DRFLAC_FALSE; |
7235 | } |
7236 | oggbs->currentBytePos = offset; |
7237 | |
7238 | return DRFLAC_TRUE; |
7239 | } else { |
7240 | if (!oggbs->onSeek(oggbs->pUserData, 0x7FFFFFFF, drflac_seek_origin_start)) { |
7241 | return DRFLAC_FALSE; |
7242 | } |
7243 | oggbs->currentBytePos = offset; |
7244 | |
7245 | return drflac_oggbs__seek_physical(oggbs, offset - 0x7FFFFFFF, drflac_seek_origin_current); |
7246 | } |
7247 | } else { |
7248 | while (offset > 0x7FFFFFFF) { |
7249 | if (!oggbs->onSeek(oggbs->pUserData, 0x7FFFFFFF, drflac_seek_origin_current)) { |
7250 | return DRFLAC_FALSE; |
7251 | } |
7252 | oggbs->currentBytePos += 0x7FFFFFFF; |
7253 | offset -= 0x7FFFFFFF; |
7254 | } |
7255 | |
7256 | if (!oggbs->onSeek(oggbs->pUserData, (int)offset, drflac_seek_origin_current)) { /* <-- Safe cast thanks to the loop above. */ |
7257 | return DRFLAC_FALSE; |
7258 | } |
7259 | oggbs->currentBytePos += offset; |
7260 | |
7261 | return DRFLAC_TRUE; |
7262 | } |
7263 | } |
7264 | |
7265 | static drflac_bool32 drflac_oggbs__goto_next_page(drflac_oggbs* oggbs, drflac_ogg_crc_mismatch_recovery recoveryMethod) |
7266 | { |
7267 | drflac_ogg_page_header header; |
7268 | for (;;) { |
7269 | drflac_uint32 crc32 = 0; |
7270 | drflac_uint32 bytesRead; |
7271 | drflac_uint32 pageBodySize; |
7272 | #ifndef DR_FLAC_NO_CRC |
7273 | drflac_uint32 actualCRC32; |
7274 | #endif |
7275 | |
7276 | if (drflac_ogg__read_page_header(oggbs->onRead, oggbs->pUserData, &header, &bytesRead, &crc32) != DRFLAC_SUCCESS) { |
7277 | return DRFLAC_FALSE; |
7278 | } |
7279 | oggbs->currentBytePos += bytesRead; |
7280 | |
7281 | pageBodySize = drflac_ogg__get_page_body_size(&header); |
7282 | if (pageBodySize > DRFLAC_OGG_MAX_PAGE_SIZE) { |
7283 | continue; /* Invalid page size. Assume it's corrupted and just move to the next page. */ |
7284 | } |
7285 | |
7286 | if (header.serialNumber != oggbs->serialNumber) { |
7287 | /* It's not a FLAC page. Skip it. */ |
7288 | if (pageBodySize > 0 && !drflac_oggbs__seek_physical(oggbs, pageBodySize, drflac_seek_origin_current)) { |
7289 | return DRFLAC_FALSE; |
7290 | } |
7291 | continue; |
7292 | } |
7293 | |
7294 | |
7295 | /* 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. */ |
7296 | if (drflac_oggbs__read_physical(oggbs, oggbs->pageData, pageBodySize) != pageBodySize) { |
7297 | return DRFLAC_FALSE; |
7298 | } |
7299 | oggbs->pageDataSize = pageBodySize; |
7300 | |
7301 | #ifndef DR_FLAC_NO_CRC |
7302 | actualCRC32 = drflac_crc32_buffer(crc32, oggbs->pageData, oggbs->pageDataSize); |
7303 | if (actualCRC32 != header.checksum) { |
7304 | if (recoveryMethod == drflac_ogg_recover_on_crc_mismatch) { |
7305 | continue; /* CRC mismatch. Skip this page. */ |
7306 | } else { |
7307 | /* |
7308 | Even though we are failing on a CRC mismatch, we still want our stream to be in a good state. Therefore we |
7309 | go to the next valid page to ensure we're in a good state, but return false to let the caller know that the |
7310 | seek did not fully complete. |
7311 | */ |
7312 | drflac_oggbs__goto_next_page(oggbs, drflac_ogg_recover_on_crc_mismatch); |
7313 | return DRFLAC_FALSE; |
7314 | } |
7315 | } |
7316 | #else |
7317 | (void)recoveryMethod; /* <-- Silence a warning. */ |
7318 | #endif |
7319 | |
7320 | oggbs->currentPageHeader = header; |
7321 | oggbs->bytesRemainingInPage = pageBodySize; |
7322 | return DRFLAC_TRUE; |
7323 | } |
7324 | } |
7325 | |
9e052883 |
7326 | /* Function below is unused at the moment, but I might be re-adding it later. */ |
7327 | #if 0 |
7328 | static drflac_uint8 drflac_oggbs__get_current_segment_index(drflac_oggbs* oggbs, drflac_uint8* pBytesRemainingInSeg) |
7329 | { |
7330 | drflac_uint32 bytesConsumedInPage = drflac_ogg__get_page_body_size(&oggbs->currentPageHeader) - oggbs->bytesRemainingInPage; |
7331 | drflac_uint8 iSeg = 0; |
7332 | drflac_uint32 iByte = 0; |
7333 | while (iByte < bytesConsumedInPage) { |
7334 | drflac_uint8 segmentSize = oggbs->currentPageHeader.segmentTable[iSeg]; |
7335 | if (iByte + segmentSize > bytesConsumedInPage) { |
7336 | break; |
7337 | } else { |
7338 | iSeg += 1; |
7339 | iByte += segmentSize; |
7340 | } |
7341 | } |
7342 | |
7343 | *pBytesRemainingInSeg = oggbs->currentPageHeader.segmentTable[iSeg] - (drflac_uint8)(bytesConsumedInPage - iByte); |
7344 | return iSeg; |
7345 | } |
7346 | |
7347 | static drflac_bool32 drflac_oggbs__seek_to_next_packet(drflac_oggbs* oggbs) |
7348 | { |
7349 | /* The current packet ends when we get to the segment with a lacing value of < 255 which is not at the end of a page. */ |
7350 | for (;;) { |
7351 | drflac_bool32 atEndOfPage = DRFLAC_FALSE; |
7352 | |
7353 | drflac_uint8 bytesRemainingInSeg; |
7354 | drflac_uint8 iFirstSeg = drflac_oggbs__get_current_segment_index(oggbs, &bytesRemainingInSeg); |
7355 | |
7356 | drflac_uint32 bytesToEndOfPacketOrPage = bytesRemainingInSeg; |
7357 | for (drflac_uint8 iSeg = iFirstSeg; iSeg < oggbs->currentPageHeader.segmentCount; ++iSeg) { |
7358 | drflac_uint8 segmentSize = oggbs->currentPageHeader.segmentTable[iSeg]; |
7359 | if (segmentSize < 255) { |
7360 | if (iSeg == oggbs->currentPageHeader.segmentCount-1) { |
7361 | atEndOfPage = DRFLAC_TRUE; |
7362 | } |
7363 | |
7364 | break; |
7365 | } |
7366 | |
7367 | bytesToEndOfPacketOrPage += segmentSize; |
7368 | } |
7369 | |
7370 | /* |
7371 | At this point we will have found either the packet or the end of the page. If were at the end of the page we'll |
7372 | want to load the next page and keep searching for the end of the packet. |
7373 | */ |
7374 | drflac_oggbs__seek_physical(oggbs, bytesToEndOfPacketOrPage, drflac_seek_origin_current); |
7375 | oggbs->bytesRemainingInPage -= bytesToEndOfPacketOrPage; |
7376 | |
7377 | if (atEndOfPage) { |
7378 | /* |
7379 | We're potentially at the next packet, but we need to check the next page first to be sure because the packet may |
7380 | straddle pages. |
7381 | */ |
7382 | if (!drflac_oggbs__goto_next_page(oggbs)) { |
7383 | return DRFLAC_FALSE; |
7384 | } |
7385 | |
7386 | /* If it's a fresh packet it most likely means we're at the next packet. */ |
7387 | if ((oggbs->currentPageHeader.headerType & 0x01) == 0) { |
7388 | return DRFLAC_TRUE; |
7389 | } |
7390 | } else { |
7391 | /* We're at the next packet. */ |
7392 | return DRFLAC_TRUE; |
7393 | } |
7394 | } |
7395 | } |
7396 | |
7397 | static drflac_bool32 drflac_oggbs__seek_to_next_frame(drflac_oggbs* oggbs) |
7398 | { |
7399 | /* The bitstream should be sitting on the first byte just after the header of the frame. */ |
7400 | |
7401 | /* What we're actually doing here is seeking to the start of the next packet. */ |
7402 | return drflac_oggbs__seek_to_next_packet(oggbs); |
7403 | } |
7404 | #endif |
7405 | |
2ff0b512 |
7406 | static size_t drflac__on_read_ogg(void* pUserData, void* bufferOut, size_t bytesToRead) |
7407 | { |
7408 | drflac_oggbs* oggbs = (drflac_oggbs*)pUserData; |
7409 | drflac_uint8* pRunningBufferOut = (drflac_uint8*)bufferOut; |
7410 | size_t bytesRead = 0; |
7411 | |
7412 | DRFLAC_ASSERT(oggbs != NULL); |
7413 | DRFLAC_ASSERT(pRunningBufferOut != NULL); |
7414 | |
7415 | /* Reading is done page-by-page. If we've run out of bytes in the page we need to move to the next one. */ |
7416 | while (bytesRead < bytesToRead) { |
7417 | size_t bytesRemainingToRead = bytesToRead - bytesRead; |
7418 | |
7419 | if (oggbs->bytesRemainingInPage >= bytesRemainingToRead) { |
7420 | DRFLAC_COPY_MEMORY(pRunningBufferOut, oggbs->pageData + (oggbs->pageDataSize - oggbs->bytesRemainingInPage), bytesRemainingToRead); |
7421 | bytesRead += bytesRemainingToRead; |
7422 | oggbs->bytesRemainingInPage -= (drflac_uint32)bytesRemainingToRead; |
7423 | break; |
7424 | } |
7425 | |
7426 | /* If we get here it means some of the requested data is contained in the next pages. */ |
7427 | if (oggbs->bytesRemainingInPage > 0) { |
7428 | DRFLAC_COPY_MEMORY(pRunningBufferOut, oggbs->pageData + (oggbs->pageDataSize - oggbs->bytesRemainingInPage), oggbs->bytesRemainingInPage); |
7429 | bytesRead += oggbs->bytesRemainingInPage; |
7430 | pRunningBufferOut += oggbs->bytesRemainingInPage; |
7431 | oggbs->bytesRemainingInPage = 0; |
7432 | } |
7433 | |
7434 | DRFLAC_ASSERT(bytesRemainingToRead > 0); |
7435 | if (!drflac_oggbs__goto_next_page(oggbs, drflac_ogg_recover_on_crc_mismatch)) { |
7436 | break; /* Failed to go to the next page. Might have simply hit the end of the stream. */ |
7437 | } |
7438 | } |
7439 | |
7440 | return bytesRead; |
7441 | } |
7442 | |
7443 | static drflac_bool32 drflac__on_seek_ogg(void* pUserData, int offset, drflac_seek_origin origin) |
7444 | { |
7445 | drflac_oggbs* oggbs = (drflac_oggbs*)pUserData; |
7446 | int bytesSeeked = 0; |
7447 | |
7448 | DRFLAC_ASSERT(oggbs != NULL); |
7449 | DRFLAC_ASSERT(offset >= 0); /* <-- Never seek backwards. */ |
7450 | |
7451 | /* Seeking is always forward which makes things a lot simpler. */ |
7452 | if (origin == drflac_seek_origin_start) { |
7453 | if (!drflac_oggbs__seek_physical(oggbs, (int)oggbs->firstBytePos, drflac_seek_origin_start)) { |
7454 | return DRFLAC_FALSE; |
7455 | } |
7456 | |
7457 | if (!drflac_oggbs__goto_next_page(oggbs, drflac_ogg_fail_on_crc_mismatch)) { |
7458 | return DRFLAC_FALSE; |
7459 | } |
7460 | |
7461 | return drflac__on_seek_ogg(pUserData, offset, drflac_seek_origin_current); |
7462 | } |
7463 | |
7464 | DRFLAC_ASSERT(origin == drflac_seek_origin_current); |
7465 | |
7466 | while (bytesSeeked < offset) { |
7467 | int bytesRemainingToSeek = offset - bytesSeeked; |
7468 | DRFLAC_ASSERT(bytesRemainingToSeek >= 0); |
7469 | |
7470 | if (oggbs->bytesRemainingInPage >= (size_t)bytesRemainingToSeek) { |
7471 | bytesSeeked += bytesRemainingToSeek; |
7472 | (void)bytesSeeked; /* <-- Silence a dead store warning emitted by Clang Static Analyzer. */ |
7473 | oggbs->bytesRemainingInPage -= bytesRemainingToSeek; |
7474 | break; |
7475 | } |
7476 | |
7477 | /* If we get here it means some of the requested data is contained in the next pages. */ |
7478 | if (oggbs->bytesRemainingInPage > 0) { |
7479 | bytesSeeked += (int)oggbs->bytesRemainingInPage; |
7480 | oggbs->bytesRemainingInPage = 0; |
7481 | } |
7482 | |
7483 | DRFLAC_ASSERT(bytesRemainingToSeek > 0); |
7484 | if (!drflac_oggbs__goto_next_page(oggbs, drflac_ogg_fail_on_crc_mismatch)) { |
7485 | /* Failed to go to the next page. We either hit the end of the stream or had a CRC mismatch. */ |
7486 | return DRFLAC_FALSE; |
7487 | } |
7488 | } |
7489 | |
7490 | return DRFLAC_TRUE; |
7491 | } |
7492 | |
7493 | |
7494 | static drflac_bool32 drflac_ogg__seek_to_pcm_frame(drflac* pFlac, drflac_uint64 pcmFrameIndex) |
7495 | { |
7496 | drflac_oggbs* oggbs = (drflac_oggbs*)pFlac->_oggbs; |
7497 | drflac_uint64 originalBytePos; |
7498 | drflac_uint64 runningGranulePosition; |
7499 | drflac_uint64 runningFrameBytePos; |
7500 | drflac_uint64 runningPCMFrameCount; |
7501 | |
7502 | DRFLAC_ASSERT(oggbs != NULL); |
7503 | |
7504 | originalBytePos = oggbs->currentBytePos; /* For recovery. Points to the OggS identifier. */ |
7505 | |
7506 | /* First seek to the first frame. */ |
7507 | if (!drflac__seek_to_byte(&pFlac->bs, pFlac->firstFLACFramePosInBytes)) { |
7508 | return DRFLAC_FALSE; |
7509 | } |
7510 | oggbs->bytesRemainingInPage = 0; |
7511 | |
7512 | runningGranulePosition = 0; |
7513 | for (;;) { |
7514 | if (!drflac_oggbs__goto_next_page(oggbs, drflac_ogg_recover_on_crc_mismatch)) { |
7515 | drflac_oggbs__seek_physical(oggbs, originalBytePos, drflac_seek_origin_start); |
7516 | return DRFLAC_FALSE; /* Never did find that sample... */ |
7517 | } |
7518 | |
7519 | runningFrameBytePos = oggbs->currentBytePos - drflac_ogg__get_page_header_size(&oggbs->currentPageHeader) - oggbs->pageDataSize; |
7520 | if (oggbs->currentPageHeader.granulePosition >= pcmFrameIndex) { |
7521 | break; /* The sample is somewhere in the previous page. */ |
7522 | } |
7523 | |
7524 | /* |
7525 | At this point we know the sample is not in the previous page. It could possibly be in this page. For simplicity we |
7526 | disregard any pages that do not begin a fresh packet. |
7527 | */ |
7528 | if ((oggbs->currentPageHeader.headerType & 0x01) == 0) { /* <-- Is it a fresh page? */ |
7529 | if (oggbs->currentPageHeader.segmentTable[0] >= 2) { |
7530 | drflac_uint8 firstBytesInPage[2]; |
7531 | firstBytesInPage[0] = oggbs->pageData[0]; |
7532 | firstBytesInPage[1] = oggbs->pageData[1]; |
7533 | |
7534 | if ((firstBytesInPage[0] == 0xFF) && (firstBytesInPage[1] & 0xFC) == 0xF8) { /* <-- Does the page begin with a frame's sync code? */ |
7535 | runningGranulePosition = oggbs->currentPageHeader.granulePosition; |
7536 | } |
7537 | |
7538 | continue; |
7539 | } |
7540 | } |
7541 | } |
7542 | |
7543 | /* |
7544 | 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 |
7545 | 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 |
7546 | a new frame. This property means that after we've seeked to the page we can immediately start looping over frames until |
7547 | we find the one containing the target sample. |
7548 | */ |
7549 | if (!drflac_oggbs__seek_physical(oggbs, runningFrameBytePos, drflac_seek_origin_start)) { |
7550 | return DRFLAC_FALSE; |
7551 | } |
7552 | if (!drflac_oggbs__goto_next_page(oggbs, drflac_ogg_recover_on_crc_mismatch)) { |
7553 | return DRFLAC_FALSE; |
7554 | } |
7555 | |
7556 | /* |
7557 | 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 |
7558 | looping over these frames until we find the one containing the sample we're after. |
7559 | */ |
7560 | runningPCMFrameCount = runningGranulePosition; |
7561 | for (;;) { |
7562 | /* |
7563 | There are two ways to find the sample and seek past irrelevant frames: |
7564 | 1) Use the native FLAC decoder. |
7565 | 2) Use Ogg's framing system. |
7566 | |
7567 | Both of these options have their own pros and cons. Using the native FLAC decoder is slower because it needs to |
7568 | do a full decode of the frame. Using Ogg's framing system is faster, but more complicated and involves some code |
7569 | duplication for the decoding of frame headers. |
7570 | |
7571 | Another thing to consider is that using the Ogg framing system will perform direct seeking of the physical Ogg |
7572 | bitstream. This is important to consider because it means we cannot read data from the drflac_bs object using the |
7573 | standard drflac__*() APIs because that will read in extra data for its own internal caching which in turn breaks |
7574 | the positioning of the read pointer of the physical Ogg bitstream. Therefore, anything that would normally be read |
7575 | using the native FLAC decoding APIs, such as drflac__read_next_flac_frame_header(), need to be re-implemented so as to |
7576 | avoid the use of the drflac_bs object. |
7577 | |
7578 | Considering these issues, I have decided to use the slower native FLAC decoding method for the following reasons: |
7579 | 1) Seeking is already partially accelerated using Ogg's paging system in the code block above. |
7580 | 2) Seeking in an Ogg encapsulated FLAC stream is probably quite uncommon. |
7581 | 3) Simplicity. |
7582 | */ |
7583 | drflac_uint64 firstPCMFrameInFLACFrame = 0; |
7584 | drflac_uint64 lastPCMFrameInFLACFrame = 0; |
7585 | drflac_uint64 pcmFrameCountInThisFrame; |
7586 | |
7587 | if (!drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFLACFrame.header)) { |
7588 | return DRFLAC_FALSE; |
7589 | } |
7590 | |
7591 | drflac__get_pcm_frame_range_of_current_flac_frame(pFlac, &firstPCMFrameInFLACFrame, &lastPCMFrameInFLACFrame); |
7592 | |
7593 | pcmFrameCountInThisFrame = (lastPCMFrameInFLACFrame - firstPCMFrameInFLACFrame) + 1; |
7594 | |
7595 | /* If we are seeking to the end of the file and we've just hit it, we're done. */ |
7596 | if (pcmFrameIndex == pFlac->totalPCMFrameCount && (runningPCMFrameCount + pcmFrameCountInThisFrame) == pFlac->totalPCMFrameCount) { |
7597 | drflac_result result = drflac__decode_flac_frame(pFlac); |
7598 | if (result == DRFLAC_SUCCESS) { |
7599 | pFlac->currentPCMFrame = pcmFrameIndex; |
7600 | pFlac->currentFLACFrame.pcmFramesRemaining = 0; |
7601 | return DRFLAC_TRUE; |
7602 | } else { |
7603 | return DRFLAC_FALSE; |
7604 | } |
7605 | } |
7606 | |
7607 | if (pcmFrameIndex < (runningPCMFrameCount + pcmFrameCountInThisFrame)) { |
7608 | /* |
7609 | 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 |
7610 | it never existed and keep iterating. |
7611 | */ |
7612 | drflac_result result = drflac__decode_flac_frame(pFlac); |
7613 | if (result == DRFLAC_SUCCESS) { |
7614 | /* The frame is valid. We just need to skip over some samples to ensure it's sample-exact. */ |
7615 | drflac_uint64 pcmFramesToDecode = (size_t)(pcmFrameIndex - runningPCMFrameCount); /* <-- Safe cast because the maximum number of samples in a frame is 65535. */ |
7616 | if (pcmFramesToDecode == 0) { |
7617 | return DRFLAC_TRUE; |
7618 | } |
7619 | |
7620 | pFlac->currentPCMFrame = runningPCMFrameCount; |
7621 | |
7622 | return drflac__seek_forward_by_pcm_frames(pFlac, pcmFramesToDecode) == pcmFramesToDecode; /* <-- If this fails, something bad has happened (it should never fail). */ |
7623 | } else { |
7624 | if (result == DRFLAC_CRC_MISMATCH) { |
7625 | continue; /* CRC mismatch. Pretend this frame never existed. */ |
7626 | } else { |
7627 | return DRFLAC_FALSE; |
7628 | } |
7629 | } |
7630 | } else { |
7631 | /* |
7632 | 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 |
7633 | frame never existed and leave the running sample count untouched. |
7634 | */ |
7635 | drflac_result result = drflac__seek_to_next_flac_frame(pFlac); |
7636 | if (result == DRFLAC_SUCCESS) { |
7637 | runningPCMFrameCount += pcmFrameCountInThisFrame; |
7638 | } else { |
7639 | if (result == DRFLAC_CRC_MISMATCH) { |
7640 | continue; /* CRC mismatch. Pretend this frame never existed. */ |
7641 | } else { |
7642 | return DRFLAC_FALSE; |
7643 | } |
7644 | } |
7645 | } |
7646 | } |
7647 | } |
7648 | |
7649 | |
7650 | |
7651 | 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) |
7652 | { |
7653 | drflac_ogg_page_header header; |
7654 | drflac_uint32 crc32 = DRFLAC_OGG_CAPTURE_PATTERN_CRC32; |
7655 | drflac_uint32 bytesRead = 0; |
7656 | |
7657 | /* Pre Condition: The bit stream should be sitting just past the 4-byte OggS capture pattern. */ |
7658 | (void)relaxed; |
7659 | |
7660 | pInit->container = drflac_container_ogg; |
7661 | pInit->oggFirstBytePos = 0; |
7662 | |
7663 | /* |
7664 | We'll get here if the first 4 bytes of the stream were the OggS capture pattern, however it doesn't necessarily mean the |
7665 | stream includes FLAC encoded audio. To check for this we need to scan the beginning-of-stream page markers and check if |
7666 | any match the FLAC specification. Important to keep in mind that the stream may be multiplexed. |
7667 | */ |
7668 | if (drflac_ogg__read_page_header_after_capture_pattern(onRead, pUserData, &header, &bytesRead, &crc32) != DRFLAC_SUCCESS) { |
7669 | return DRFLAC_FALSE; |
7670 | } |
7671 | pInit->runningFilePos += bytesRead; |
7672 | |
7673 | for (;;) { |
7674 | int pageBodySize; |
7675 | |
7676 | /* Break if we're past the beginning of stream page. */ |
7677 | if ((header.headerType & 0x02) == 0) { |
7678 | return DRFLAC_FALSE; |
7679 | } |
7680 | |
7681 | /* Check if it's a FLAC header. */ |
7682 | pageBodySize = drflac_ogg__get_page_body_size(&header); |
7683 | if (pageBodySize == 51) { /* 51 = the lacing value of the FLAC header packet. */ |
7684 | /* It could be a FLAC page... */ |
7685 | drflac_uint32 bytesRemainingInPage = pageBodySize; |
7686 | drflac_uint8 packetType; |
7687 | |
7688 | if (onRead(pUserData, &packetType, 1) != 1) { |
7689 | return DRFLAC_FALSE; |
7690 | } |
7691 | |
7692 | bytesRemainingInPage -= 1; |
7693 | if (packetType == 0x7F) { |
7694 | /* Increasingly more likely to be a FLAC page... */ |
7695 | drflac_uint8 sig[4]; |
7696 | if (onRead(pUserData, sig, 4) != 4) { |
7697 | return DRFLAC_FALSE; |
7698 | } |
7699 | |
7700 | bytesRemainingInPage -= 4; |
7701 | if (sig[0] == 'F' && sig[1] == 'L' && sig[2] == 'A' && sig[3] == 'C') { |
7702 | /* Almost certainly a FLAC page... */ |
7703 | drflac_uint8 mappingVersion[2]; |
7704 | if (onRead(pUserData, mappingVersion, 2) != 2) { |
7705 | return DRFLAC_FALSE; |
7706 | } |
7707 | |
7708 | if (mappingVersion[0] != 1) { |
7709 | return DRFLAC_FALSE; /* Only supporting version 1.x of the Ogg mapping. */ |
7710 | } |
7711 | |
7712 | /* |
7713 | The next 2 bytes are the non-audio packets, not including this one. We don't care about this because we're going to |
7714 | be handling it in a generic way based on the serial number and packet types. |
7715 | */ |
7716 | if (!onSeek(pUserData, 2, drflac_seek_origin_current)) { |
7717 | return DRFLAC_FALSE; |
7718 | } |
7719 | |
7720 | /* Expecting the native FLAC signature "fLaC". */ |
7721 | if (onRead(pUserData, sig, 4) != 4) { |
7722 | return DRFLAC_FALSE; |
7723 | } |
7724 | |
7725 | if (sig[0] == 'f' && sig[1] == 'L' && sig[2] == 'a' && sig[3] == 'C') { |
7726 | /* The remaining data in the page should be the STREAMINFO block. */ |
7727 | drflac_streaminfo streaminfo; |
7728 | drflac_uint8 isLastBlock; |
7729 | drflac_uint8 blockType; |
7730 | drflac_uint32 blockSize; |
7731 | if (!drflac__read_and_decode_block_header(onRead, pUserData, &isLastBlock, &blockType, &blockSize)) { |
7732 | return DRFLAC_FALSE; |
7733 | } |
7734 | |
7735 | if (blockType != DRFLAC_METADATA_BLOCK_TYPE_STREAMINFO || blockSize != 34) { |
7736 | return DRFLAC_FALSE; /* Invalid block type. First block must be the STREAMINFO block. */ |
7737 | } |
7738 | |
7739 | if (drflac__read_streaminfo(onRead, pUserData, &streaminfo)) { |
7740 | /* Success! */ |
7741 | pInit->hasStreamInfoBlock = DRFLAC_TRUE; |
7742 | pInit->sampleRate = streaminfo.sampleRate; |
7743 | pInit->channels = streaminfo.channels; |
7744 | pInit->bitsPerSample = streaminfo.bitsPerSample; |
7745 | pInit->totalPCMFrameCount = streaminfo.totalPCMFrameCount; |
7746 | pInit->maxBlockSizeInPCMFrames = streaminfo.maxBlockSizeInPCMFrames; |
7747 | pInit->hasMetadataBlocks = !isLastBlock; |
7748 | |
7749 | if (onMeta) { |
7750 | drflac_metadata metadata; |
7751 | metadata.type = DRFLAC_METADATA_BLOCK_TYPE_STREAMINFO; |
7752 | metadata.pRawData = NULL; |
7753 | metadata.rawDataSize = 0; |
7754 | metadata.data.streaminfo = streaminfo; |
7755 | onMeta(pUserDataMD, &metadata); |
7756 | } |
7757 | |
7758 | pInit->runningFilePos += pageBodySize; |
7759 | pInit->oggFirstBytePos = pInit->runningFilePos - 79; /* Subtracting 79 will place us right on top of the "OggS" identifier of the FLAC bos page. */ |
7760 | pInit->oggSerial = header.serialNumber; |
7761 | pInit->oggBosHeader = header; |
7762 | break; |
7763 | } else { |
7764 | /* Failed to read STREAMINFO block. Aww, so close... */ |
7765 | return DRFLAC_FALSE; |
7766 | } |
7767 | } else { |
7768 | /* Invalid file. */ |
7769 | return DRFLAC_FALSE; |
7770 | } |
7771 | } else { |
7772 | /* Not a FLAC header. Skip it. */ |
7773 | if (!onSeek(pUserData, bytesRemainingInPage, drflac_seek_origin_current)) { |
7774 | return DRFLAC_FALSE; |
7775 | } |
7776 | } |
7777 | } else { |
7778 | /* Not a FLAC header. Seek past the entire page and move on to the next. */ |
7779 | if (!onSeek(pUserData, bytesRemainingInPage, drflac_seek_origin_current)) { |
7780 | return DRFLAC_FALSE; |
7781 | } |
7782 | } |
7783 | } else { |
7784 | if (!onSeek(pUserData, pageBodySize, drflac_seek_origin_current)) { |
7785 | return DRFLAC_FALSE; |
7786 | } |
7787 | } |
7788 | |
7789 | pInit->runningFilePos += pageBodySize; |
7790 | |
7791 | |
7792 | /* Read the header of the next page. */ |
7793 | if (drflac_ogg__read_page_header(onRead, pUserData, &header, &bytesRead, &crc32) != DRFLAC_SUCCESS) { |
7794 | return DRFLAC_FALSE; |
7795 | } |
7796 | pInit->runningFilePos += bytesRead; |
7797 | } |
7798 | |
7799 | /* |
7800 | 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 |
7801 | 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 |
7802 | Ogg bistream object. |
7803 | */ |
7804 | pInit->hasMetadataBlocks = DRFLAC_TRUE; /* <-- Always have at least VORBIS_COMMENT metadata block. */ |
7805 | return DRFLAC_TRUE; |
7806 | } |
7807 | #endif |
7808 | |
7809 | 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) |
7810 | { |
7811 | drflac_bool32 relaxed; |
7812 | drflac_uint8 id[4]; |
7813 | |
7814 | if (pInit == NULL || onRead == NULL || onSeek == NULL) { |
7815 | return DRFLAC_FALSE; |
7816 | } |
7817 | |
7818 | DRFLAC_ZERO_MEMORY(pInit, sizeof(*pInit)); |
7819 | pInit->onRead = onRead; |
7820 | pInit->onSeek = onSeek; |
7821 | pInit->onMeta = onMeta; |
7822 | pInit->container = container; |
7823 | pInit->pUserData = pUserData; |
7824 | pInit->pUserDataMD = pUserDataMD; |
7825 | |
7826 | pInit->bs.onRead = onRead; |
7827 | pInit->bs.onSeek = onSeek; |
7828 | pInit->bs.pUserData = pUserData; |
7829 | drflac__reset_cache(&pInit->bs); |
7830 | |
7831 | |
7832 | /* If the container is explicitly defined then we can try opening in relaxed mode. */ |
7833 | relaxed = container != drflac_container_unknown; |
7834 | |
7835 | /* Skip over any ID3 tags. */ |
7836 | for (;;) { |
7837 | if (onRead(pUserData, id, 4) != 4) { |
7838 | return DRFLAC_FALSE; /* Ran out of data. */ |
7839 | } |
7840 | pInit->runningFilePos += 4; |
7841 | |
7842 | if (id[0] == 'I' && id[1] == 'D' && id[2] == '3') { |
7843 | drflac_uint8 header[6]; |
7844 | drflac_uint8 flags; |
7845 | drflac_uint32 headerSize; |
7846 | |
7847 | if (onRead(pUserData, header, 6) != 6) { |
7848 | return DRFLAC_FALSE; /* Ran out of data. */ |
7849 | } |
7850 | pInit->runningFilePos += 6; |
7851 | |
7852 | flags = header[1]; |
7853 | |
7854 | DRFLAC_COPY_MEMORY(&headerSize, header+2, 4); |
7855 | headerSize = drflac__unsynchsafe_32(drflac__be2host_32(headerSize)); |
7856 | if (flags & 0x10) { |
7857 | headerSize += 10; |
7858 | } |
7859 | |
7860 | if (!onSeek(pUserData, headerSize, drflac_seek_origin_current)) { |
7861 | return DRFLAC_FALSE; /* Failed to seek past the tag. */ |
7862 | } |
7863 | pInit->runningFilePos += headerSize; |
7864 | } else { |
7865 | break; |
7866 | } |
7867 | } |
7868 | |
7869 | if (id[0] == 'f' && id[1] == 'L' && id[2] == 'a' && id[3] == 'C') { |
7870 | return drflac__init_private__native(pInit, onRead, onSeek, onMeta, pUserData, pUserDataMD, relaxed); |
7871 | } |
7872 | #ifndef DR_FLAC_NO_OGG |
7873 | if (id[0] == 'O' && id[1] == 'g' && id[2] == 'g' && id[3] == 'S') { |
7874 | return drflac__init_private__ogg(pInit, onRead, onSeek, onMeta, pUserData, pUserDataMD, relaxed); |
7875 | } |
7876 | #endif |
7877 | |
7878 | /* If we get here it means we likely don't have a header. Try opening in relaxed mode, if applicable. */ |
7879 | if (relaxed) { |
7880 | if (container == drflac_container_native) { |
7881 | return drflac__init_private__native(pInit, onRead, onSeek, onMeta, pUserData, pUserDataMD, relaxed); |
7882 | } |
7883 | #ifndef DR_FLAC_NO_OGG |
7884 | if (container == drflac_container_ogg) { |
7885 | return drflac__init_private__ogg(pInit, onRead, onSeek, onMeta, pUserData, pUserDataMD, relaxed); |
7886 | } |
7887 | #endif |
7888 | } |
7889 | |
7890 | /* Unsupported container. */ |
7891 | return DRFLAC_FALSE; |
7892 | } |
7893 | |
7894 | static void drflac__init_from_info(drflac* pFlac, const drflac_init_info* pInit) |
7895 | { |
7896 | DRFLAC_ASSERT(pFlac != NULL); |
7897 | DRFLAC_ASSERT(pInit != NULL); |
7898 | |
7899 | DRFLAC_ZERO_MEMORY(pFlac, sizeof(*pFlac)); |
7900 | pFlac->bs = pInit->bs; |
7901 | pFlac->onMeta = pInit->onMeta; |
7902 | pFlac->pUserDataMD = pInit->pUserDataMD; |
7903 | pFlac->maxBlockSizeInPCMFrames = pInit->maxBlockSizeInPCMFrames; |
7904 | pFlac->sampleRate = pInit->sampleRate; |
7905 | pFlac->channels = (drflac_uint8)pInit->channels; |
7906 | pFlac->bitsPerSample = (drflac_uint8)pInit->bitsPerSample; |
7907 | pFlac->totalPCMFrameCount = pInit->totalPCMFrameCount; |
7908 | pFlac->container = pInit->container; |
7909 | } |
7910 | |
7911 | |
7912 | 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) |
7913 | { |
7914 | drflac_init_info init; |
7915 | drflac_uint32 allocationSize; |
7916 | drflac_uint32 wholeSIMDVectorCountPerChannel; |
7917 | drflac_uint32 decodedSamplesAllocationSize; |
7918 | #ifndef DR_FLAC_NO_OGG |
9e052883 |
7919 | drflac_oggbs* pOggbs = NULL; |
2ff0b512 |
7920 | #endif |
7921 | drflac_uint64 firstFramePos; |
7922 | drflac_uint64 seektablePos; |
9e052883 |
7923 | drflac_uint32 seekpointCount; |
2ff0b512 |
7924 | drflac_allocation_callbacks allocationCallbacks; |
7925 | drflac* pFlac; |
7926 | |
7927 | /* CPU support first. */ |
7928 | drflac__init_cpu_caps(); |
7929 | |
7930 | if (!drflac__init_private(&init, onRead, onSeek, onMeta, container, pUserData, pUserDataMD)) { |
7931 | return NULL; |
7932 | } |
7933 | |
7934 | if (pAllocationCallbacks != NULL) { |
7935 | allocationCallbacks = *pAllocationCallbacks; |
7936 | if (allocationCallbacks.onFree == NULL || (allocationCallbacks.onMalloc == NULL && allocationCallbacks.onRealloc == NULL)) { |
7937 | return NULL; /* Invalid allocation callbacks. */ |
7938 | } |
7939 | } else { |
7940 | allocationCallbacks.pUserData = NULL; |
7941 | allocationCallbacks.onMalloc = drflac__malloc_default; |
7942 | allocationCallbacks.onRealloc = drflac__realloc_default; |
7943 | allocationCallbacks.onFree = drflac__free_default; |
7944 | } |
7945 | |
7946 | |
7947 | /* |
7948 | The size of the allocation for the drflac object needs to be large enough to fit the following: |
7949 | 1) The main members of the drflac structure |
7950 | 2) A block of memory large enough to store the decoded samples of the largest frame in the stream |
7951 | 3) If the container is Ogg, a drflac_oggbs object |
7952 | |
7953 | The complicated part of the allocation is making sure there's enough room the decoded samples, taking into consideration |
7954 | the different SIMD instruction sets. |
7955 | */ |
7956 | allocationSize = sizeof(drflac); |
7957 | |
7958 | /* |
7959 | The allocation size for decoded frames depends on the number of 32-bit integers that fit inside the largest SIMD vector |
7960 | we are supporting. |
7961 | */ |
7962 | if ((init.maxBlockSizeInPCMFrames % (DRFLAC_MAX_SIMD_VECTOR_SIZE / sizeof(drflac_int32))) == 0) { |
7963 | wholeSIMDVectorCountPerChannel = (init.maxBlockSizeInPCMFrames / (DRFLAC_MAX_SIMD_VECTOR_SIZE / sizeof(drflac_int32))); |
7964 | } else { |
7965 | wholeSIMDVectorCountPerChannel = (init.maxBlockSizeInPCMFrames / (DRFLAC_MAX_SIMD_VECTOR_SIZE / sizeof(drflac_int32))) + 1; |
7966 | } |
7967 | |
7968 | decodedSamplesAllocationSize = wholeSIMDVectorCountPerChannel * DRFLAC_MAX_SIMD_VECTOR_SIZE * init.channels; |
7969 | |
7970 | allocationSize += decodedSamplesAllocationSize; |
7971 | allocationSize += DRFLAC_MAX_SIMD_VECTOR_SIZE; /* Allocate extra bytes to ensure we have enough for alignment. */ |
7972 | |
7973 | #ifndef DR_FLAC_NO_OGG |
7974 | /* There's additional data required for Ogg streams. */ |
7975 | if (init.container == drflac_container_ogg) { |
7976 | allocationSize += sizeof(drflac_oggbs); |
2ff0b512 |
7977 | |
9e052883 |
7978 | pOggbs = (drflac_oggbs*)drflac__malloc_from_callbacks(sizeof(*pOggbs), &allocationCallbacks); |
7979 | if (pOggbs == NULL) { |
7980 | return NULL; /*DRFLAC_OUT_OF_MEMORY;*/ |
7981 | } |
7982 | |
7983 | DRFLAC_ZERO_MEMORY(pOggbs, sizeof(*pOggbs)); |
7984 | pOggbs->onRead = onRead; |
7985 | pOggbs->onSeek = onSeek; |
7986 | pOggbs->pUserData = pUserData; |
7987 | pOggbs->currentBytePos = init.oggFirstBytePos; |
7988 | pOggbs->firstBytePos = init.oggFirstBytePos; |
7989 | pOggbs->serialNumber = init.oggSerial; |
7990 | pOggbs->bosPageHeader = init.oggBosHeader; |
7991 | pOggbs->bytesRemainingInPage = 0; |
2ff0b512 |
7992 | } |
7993 | #endif |
7994 | |
7995 | /* |
7996 | 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 |
7997 | consist of only a single heap allocation. To this, the size of the seek table needs to be known, which we determine when reading |
7998 | and decoding the metadata. |
7999 | */ |
9e052883 |
8000 | firstFramePos = 42; /* <-- We know we are at byte 42 at this point. */ |
8001 | seektablePos = 0; |
8002 | seekpointCount = 0; |
2ff0b512 |
8003 | if (init.hasMetadataBlocks) { |
8004 | drflac_read_proc onReadOverride = onRead; |
8005 | drflac_seek_proc onSeekOverride = onSeek; |
8006 | void* pUserDataOverride = pUserData; |
8007 | |
8008 | #ifndef DR_FLAC_NO_OGG |
8009 | if (init.container == drflac_container_ogg) { |
8010 | onReadOverride = drflac__on_read_ogg; |
8011 | onSeekOverride = drflac__on_seek_ogg; |
9e052883 |
8012 | pUserDataOverride = (void*)pOggbs; |
2ff0b512 |
8013 | } |
8014 | #endif |
8015 | |
9e052883 |
8016 | if (!drflac__read_and_decode_metadata(onReadOverride, onSeekOverride, onMeta, pUserDataOverride, pUserDataMD, &firstFramePos, &seektablePos, &seekpointCount, &allocationCallbacks)) { |
8017 | #ifndef DR_FLAC_NO_OGG |
8018 | drflac__free_from_callbacks(pOggbs, &allocationCallbacks); |
8019 | #endif |
2ff0b512 |
8020 | return NULL; |
8021 | } |
8022 | |
9e052883 |
8023 | allocationSize += seekpointCount * sizeof(drflac_seekpoint); |
2ff0b512 |
8024 | } |
8025 | |
8026 | |
8027 | pFlac = (drflac*)drflac__malloc_from_callbacks(allocationSize, &allocationCallbacks); |
8028 | if (pFlac == NULL) { |
9e052883 |
8029 | #ifndef DR_FLAC_NO_OGG |
8030 | drflac__free_from_callbacks(pOggbs, &allocationCallbacks); |
8031 | #endif |
2ff0b512 |
8032 | return NULL; |
8033 | } |
8034 | |
8035 | drflac__init_from_info(pFlac, &init); |
8036 | pFlac->allocationCallbacks = allocationCallbacks; |
8037 | pFlac->pDecodedSamples = (drflac_int32*)drflac_align((size_t)pFlac->pExtraData, DRFLAC_MAX_SIMD_VECTOR_SIZE); |
8038 | |
8039 | #ifndef DR_FLAC_NO_OGG |
8040 | if (init.container == drflac_container_ogg) { |
9e052883 |
8041 | drflac_oggbs* pInternalOggbs = (drflac_oggbs*)((drflac_uint8*)pFlac->pDecodedSamples + decodedSamplesAllocationSize + (seekpointCount * sizeof(drflac_seekpoint))); |
8042 | DRFLAC_COPY_MEMORY(pInternalOggbs, pOggbs, sizeof(*pOggbs)); |
8043 | |
8044 | /* At this point the pOggbs object has been handed over to pInternalOggbs and can be freed. */ |
8045 | drflac__free_from_callbacks(pOggbs, &allocationCallbacks); |
8046 | pOggbs = NULL; |
2ff0b512 |
8047 | |
8048 | /* The Ogg bistream needs to be layered on top of the original bitstream. */ |
8049 | pFlac->bs.onRead = drflac__on_read_ogg; |
8050 | pFlac->bs.onSeek = drflac__on_seek_ogg; |
8051 | pFlac->bs.pUserData = (void*)pInternalOggbs; |
8052 | pFlac->_oggbs = (void*)pInternalOggbs; |
8053 | } |
8054 | #endif |
8055 | |
8056 | pFlac->firstFLACFramePosInBytes = firstFramePos; |
8057 | |
8058 | /* 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. */ |
8059 | #ifndef DR_FLAC_NO_OGG |
8060 | if (init.container == drflac_container_ogg) |
8061 | { |
8062 | pFlac->pSeekpoints = NULL; |
8063 | pFlac->seekpointCount = 0; |
8064 | } |
8065 | else |
8066 | #endif |
8067 | { |
8068 | /* If we have a seektable we need to load it now, making sure we move back to where we were previously. */ |
8069 | if (seektablePos != 0) { |
9e052883 |
8070 | pFlac->seekpointCount = seekpointCount; |
2ff0b512 |
8071 | pFlac->pSeekpoints = (drflac_seekpoint*)((drflac_uint8*)pFlac->pDecodedSamples + decodedSamplesAllocationSize); |
8072 | |
8073 | DRFLAC_ASSERT(pFlac->bs.onSeek != NULL); |
8074 | DRFLAC_ASSERT(pFlac->bs.onRead != NULL); |
8075 | |
8076 | /* Seek to the seektable, then just read directly into our seektable buffer. */ |
8077 | if (pFlac->bs.onSeek(pFlac->bs.pUserData, (int)seektablePos, drflac_seek_origin_start)) { |
9e052883 |
8078 | drflac_uint32 iSeekpoint; |
8079 | |
8080 | for (iSeekpoint = 0; iSeekpoint < seekpointCount; iSeekpoint += 1) { |
8081 | if (pFlac->bs.onRead(pFlac->bs.pUserData, pFlac->pSeekpoints + iSeekpoint, DRFLAC_SEEKPOINT_SIZE_IN_BYTES) == DRFLAC_SEEKPOINT_SIZE_IN_BYTES) { |
8082 | /* Endian swap. */ |
2ff0b512 |
8083 | pFlac->pSeekpoints[iSeekpoint].firstPCMFrame = drflac__be2host_64(pFlac->pSeekpoints[iSeekpoint].firstPCMFrame); |
8084 | pFlac->pSeekpoints[iSeekpoint].flacFrameOffset = drflac__be2host_64(pFlac->pSeekpoints[iSeekpoint].flacFrameOffset); |
8085 | pFlac->pSeekpoints[iSeekpoint].pcmFrameCount = drflac__be2host_16(pFlac->pSeekpoints[iSeekpoint].pcmFrameCount); |
9e052883 |
8086 | } else { |
8087 | /* Failed to read the seektable. Pretend we don't have one. */ |
8088 | pFlac->pSeekpoints = NULL; |
8089 | pFlac->seekpointCount = 0; |
8090 | break; |
f5b7bb83 |
8091 | } |
f5b7bb83 |
8092 | } |
2ff0b512 |
8093 | |
f5b7bb83 |
8094 | /* We need to seek back to where we were. If this fails it's a critical error. */ |
8095 | if (!pFlac->bs.onSeek(pFlac->bs.pUserData, (int)pFlac->firstFLACFramePosInBytes, drflac_seek_origin_start)) { |
8096 | drflac__free_from_callbacks(pFlac, &allocationCallbacks); |
8097 | return NULL; |
8098 | } |
8099 | } else { |
8100 | /* Failed to seek to the seektable. Ominous sign, but for now we can just pretend we don't have one. */ |
8101 | pFlac->pSeekpoints = NULL; |
8102 | pFlac->seekpointCount = 0; |
8103 | } |
8104 | } |
2ff0b512 |
8105 | } |
8106 | |
2ff0b512 |
8107 | |
9e052883 |
8108 | /* |
8109 | 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 |
8110 | the first frame. |
8111 | */ |
8112 | if (!init.hasStreamInfoBlock) { |
8113 | pFlac->currentFLACFrame.header = init.firstFrameHeader; |
8114 | for (;;) { |
8115 | drflac_result result = drflac__decode_flac_frame(pFlac); |
8116 | if (result == DRFLAC_SUCCESS) { |
8117 | break; |
8118 | } else { |
8119 | if (result == DRFLAC_CRC_MISMATCH) { |
8120 | if (!drflac__read_next_flac_frame_header(&pFlac->bs, pFlac->bitsPerSample, &pFlac->currentFLACFrame.header)) { |
8121 | drflac__free_from_callbacks(pFlac, &allocationCallbacks); |
8122 | return NULL; |
8123 | } |
8124 | continue; |
8125 | } else { |
8126 | drflac__free_from_callbacks(pFlac, &allocationCallbacks); |
8127 | return NULL; |
8128 | } |
8129 | } |
8130 | } |
8131 | } |
8132 | |
8133 | return pFlac; |
8134 | } |
8135 | |
8136 | |
8137 | |
8138 | #ifndef DR_FLAC_NO_STDIO |
8139 | #include <stdio.h> |
8140 | #ifndef DR_FLAC_NO_WCHAR |
8141 | #include <wchar.h> /* For wcslen(), wcsrtombs() */ |
8142 | #endif |
8143 | |
8144 | /* drflac_result_from_errno() is only used for fopen() and wfopen() so putting it inside DR_WAV_NO_STDIO for now. If something else needs this later we can move it out. */ |
8145 | #include <errno.h> |
8146 | static drflac_result drflac_result_from_errno(int e) |
8147 | { |
8148 | switch (e) |
8149 | { |
8150 | case 0: return DRFLAC_SUCCESS; |
8151 | #ifdef EPERM |
8152 | case EPERM: return DRFLAC_INVALID_OPERATION; |
8153 | #endif |
8154 | #ifdef ENOENT |
8155 | case ENOENT: return DRFLAC_DOES_NOT_EXIST; |
8156 | #endif |
8157 | #ifdef ESRCH |
8158 | case ESRCH: return DRFLAC_DOES_NOT_EXIST; |
8159 | #endif |
8160 | #ifdef EINTR |
8161 | case EINTR: return DRFLAC_INTERRUPT; |
8162 | #endif |
8163 | #ifdef EIO |
8164 | case EIO: return DRFLAC_IO_ERROR; |
8165 | #endif |
8166 | #ifdef ENXIO |
8167 | case ENXIO: return DRFLAC_DOES_NOT_EXIST; |
8168 | #endif |
8169 | #ifdef E2BIG |
8170 | case E2BIG: return DRFLAC_INVALID_ARGS; |
8171 | #endif |
8172 | #ifdef ENOEXEC |
8173 | case ENOEXEC: return DRFLAC_INVALID_FILE; |
8174 | #endif |
8175 | #ifdef EBADF |
8176 | case EBADF: return DRFLAC_INVALID_FILE; |
8177 | #endif |
8178 | #ifdef ECHILD |
8179 | case ECHILD: return DRFLAC_ERROR; |
8180 | #endif |
8181 | #ifdef EAGAIN |
8182 | case EAGAIN: return DRFLAC_UNAVAILABLE; |
8183 | #endif |
8184 | #ifdef ENOMEM |
8185 | case ENOMEM: return DRFLAC_OUT_OF_MEMORY; |
8186 | #endif |
8187 | #ifdef EACCES |
8188 | case EACCES: return DRFLAC_ACCESS_DENIED; |
8189 | #endif |
8190 | #ifdef EFAULT |
8191 | case EFAULT: return DRFLAC_BAD_ADDRESS; |
8192 | #endif |
8193 | #ifdef ENOTBLK |
8194 | case ENOTBLK: return DRFLAC_ERROR; |
8195 | #endif |
8196 | #ifdef EBUSY |
8197 | case EBUSY: return DRFLAC_BUSY; |
8198 | #endif |
8199 | #ifdef EEXIST |
8200 | case EEXIST: return DRFLAC_ALREADY_EXISTS; |
8201 | #endif |
8202 | #ifdef EXDEV |
8203 | case EXDEV: return DRFLAC_ERROR; |
8204 | #endif |
8205 | #ifdef ENODEV |
8206 | case ENODEV: return DRFLAC_DOES_NOT_EXIST; |
8207 | #endif |
8208 | #ifdef ENOTDIR |
8209 | case ENOTDIR: return DRFLAC_NOT_DIRECTORY; |
8210 | #endif |
8211 | #ifdef EISDIR |
8212 | case EISDIR: return DRFLAC_IS_DIRECTORY; |
8213 | #endif |
8214 | #ifdef EINVAL |
8215 | case EINVAL: return DRFLAC_INVALID_ARGS; |
8216 | #endif |
8217 | #ifdef ENFILE |
8218 | case ENFILE: return DRFLAC_TOO_MANY_OPEN_FILES; |
8219 | #endif |
8220 | #ifdef EMFILE |
8221 | case EMFILE: return DRFLAC_TOO_MANY_OPEN_FILES; |
8222 | #endif |
8223 | #ifdef ENOTTY |
8224 | case ENOTTY: return DRFLAC_INVALID_OPERATION; |
8225 | #endif |
8226 | #ifdef ETXTBSY |
8227 | case ETXTBSY: return DRFLAC_BUSY; |
8228 | #endif |
8229 | #ifdef EFBIG |
8230 | case EFBIG: return DRFLAC_TOO_BIG; |
8231 | #endif |
8232 | #ifdef ENOSPC |
8233 | case ENOSPC: return DRFLAC_NO_SPACE; |
8234 | #endif |
8235 | #ifdef ESPIPE |
8236 | case ESPIPE: return DRFLAC_BAD_SEEK; |
8237 | #endif |
8238 | #ifdef EROFS |
8239 | case EROFS: return DRFLAC_ACCESS_DENIED; |
8240 | #endif |
8241 | #ifdef EMLINK |
8242 | case EMLINK: return DRFLAC_TOO_MANY_LINKS; |
8243 | #endif |
8244 | #ifdef EPIPE |
8245 | case EPIPE: return DRFLAC_BAD_PIPE; |
8246 | #endif |
8247 | #ifdef EDOM |
8248 | case EDOM: return DRFLAC_OUT_OF_RANGE; |
8249 | #endif |
8250 | #ifdef ERANGE |
8251 | case ERANGE: return DRFLAC_OUT_OF_RANGE; |
8252 | #endif |
8253 | #ifdef EDEADLK |
8254 | case EDEADLK: return DRFLAC_DEADLOCK; |
8255 | #endif |
8256 | #ifdef ENAMETOOLONG |
8257 | case ENAMETOOLONG: return DRFLAC_PATH_TOO_LONG; |
8258 | #endif |
8259 | #ifdef ENOLCK |
8260 | case ENOLCK: return DRFLAC_ERROR; |
8261 | #endif |
8262 | #ifdef ENOSYS |
8263 | case ENOSYS: return DRFLAC_NOT_IMPLEMENTED; |
8264 | #endif |
8265 | #ifdef ENOTEMPTY |
8266 | case ENOTEMPTY: return DRFLAC_DIRECTORY_NOT_EMPTY; |
8267 | #endif |
8268 | #ifdef ELOOP |
8269 | case ELOOP: return DRFLAC_TOO_MANY_LINKS; |
8270 | #endif |
8271 | #ifdef ENOMSG |
8272 | case ENOMSG: return DRFLAC_NO_MESSAGE; |
8273 | #endif |
8274 | #ifdef EIDRM |
8275 | case EIDRM: return DRFLAC_ERROR; |
8276 | #endif |
8277 | #ifdef ECHRNG |
8278 | case ECHRNG: return DRFLAC_ERROR; |
8279 | #endif |
8280 | #ifdef EL2NSYNC |
8281 | case EL2NSYNC: return DRFLAC_ERROR; |
8282 | #endif |
8283 | #ifdef EL3HLT |
8284 | case EL3HLT: return DRFLAC_ERROR; |
8285 | #endif |
8286 | #ifdef EL3RST |
8287 | case EL3RST: return DRFLAC_ERROR; |
8288 | #endif |
8289 | #ifdef ELNRNG |
8290 | case ELNRNG: return DRFLAC_OUT_OF_RANGE; |
8291 | #endif |
8292 | #ifdef EUNATCH |
8293 | case EUNATCH: return DRFLAC_ERROR; |
8294 | #endif |
8295 | #ifdef ENOCSI |
8296 | case ENOCSI: return DRFLAC_ERROR; |
8297 | #endif |
8298 | #ifdef EL2HLT |
8299 | case EL2HLT: return DRFLAC_ERROR; |
8300 | #endif |
8301 | #ifdef EBADE |
8302 | case EBADE: return DRFLAC_ERROR; |
8303 | #endif |
8304 | #ifdef EBADR |
8305 | case EBADR: return DRFLAC_ERROR; |
8306 | #endif |
8307 | #ifdef EXFULL |
8308 | case EXFULL: return DRFLAC_ERROR; |
8309 | #endif |
8310 | #ifdef ENOANO |
8311 | case ENOANO: return DRFLAC_ERROR; |
8312 | #endif |
8313 | #ifdef EBADRQC |
8314 | case EBADRQC: return DRFLAC_ERROR; |
8315 | #endif |
8316 | #ifdef EBADSLT |
8317 | case EBADSLT: return DRFLAC_ERROR; |
8318 | #endif |
8319 | #ifdef EBFONT |
8320 | case EBFONT: return DRFLAC_INVALID_FILE; |
8321 | #endif |
8322 | #ifdef ENOSTR |
8323 | case ENOSTR: return DRFLAC_ERROR; |
8324 | #endif |
8325 | #ifdef ENODATA |
8326 | case ENODATA: return DRFLAC_NO_DATA_AVAILABLE; |
8327 | #endif |
8328 | #ifdef ETIME |
8329 | case ETIME: return DRFLAC_TIMEOUT; |
8330 | #endif |
8331 | #ifdef ENOSR |
8332 | case ENOSR: return DRFLAC_NO_DATA_AVAILABLE; |
8333 | #endif |
8334 | #ifdef ENONET |
8335 | case ENONET: return DRFLAC_NO_NETWORK; |
8336 | #endif |
8337 | #ifdef ENOPKG |
8338 | case ENOPKG: return DRFLAC_ERROR; |
8339 | #endif |
8340 | #ifdef EREMOTE |
8341 | case EREMOTE: return DRFLAC_ERROR; |
8342 | #endif |
8343 | #ifdef ENOLINK |
8344 | case ENOLINK: return DRFLAC_ERROR; |
8345 | #endif |
8346 | #ifdef EADV |
8347 | case EADV: return DRFLAC_ERROR; |
8348 | #endif |
8349 | #ifdef ESRMNT |
8350 | case ESRMNT: return DRFLAC_ERROR; |
8351 | #endif |
8352 | #ifdef ECOMM |
8353 | case ECOMM: return DRFLAC_ERROR; |
8354 | #endif |
8355 | #ifdef EPROTO |
8356 | case EPROTO: return DRFLAC_ERROR; |
8357 | #endif |
8358 | #ifdef EMULTIHOP |
8359 | case EMULTIHOP: return DRFLAC_ERROR; |
8360 | #endif |
8361 | #ifdef EDOTDOT |
8362 | case EDOTDOT: return DRFLAC_ERROR; |
8363 | #endif |
8364 | #ifdef EBADMSG |
8365 | case EBADMSG: return DRFLAC_BAD_MESSAGE; |
8366 | #endif |
8367 | #ifdef EOVERFLOW |
8368 | case EOVERFLOW: return DRFLAC_TOO_BIG; |
8369 | #endif |
8370 | #ifdef ENOTUNIQ |
8371 | case ENOTUNIQ: return DRFLAC_NOT_UNIQUE; |
8372 | #endif |
8373 | #ifdef EBADFD |
8374 | case EBADFD: return DRFLAC_ERROR; |
8375 | #endif |
8376 | #ifdef EREMCHG |
8377 | case EREMCHG: return DRFLAC_ERROR; |
8378 | #endif |
8379 | #ifdef ELIBACC |
8380 | case ELIBACC: return DRFLAC_ACCESS_DENIED; |
8381 | #endif |
8382 | #ifdef ELIBBAD |
8383 | case ELIBBAD: return DRFLAC_INVALID_FILE; |
8384 | #endif |
8385 | #ifdef ELIBSCN |
8386 | case ELIBSCN: return DRFLAC_INVALID_FILE; |
8387 | #endif |
8388 | #ifdef ELIBMAX |
8389 | case ELIBMAX: return DRFLAC_ERROR; |
8390 | #endif |
8391 | #ifdef ELIBEXEC |
8392 | case ELIBEXEC: return DRFLAC_ERROR; |
8393 | #endif |
8394 | #ifdef EILSEQ |
8395 | case EILSEQ: return DRFLAC_INVALID_DATA; |
8396 | #endif |
8397 | #ifdef ERESTART |
8398 | case ERESTART: return DRFLAC_ERROR; |
8399 | #endif |
8400 | #ifdef ESTRPIPE |
8401 | case ESTRPIPE: return DRFLAC_ERROR; |
8402 | #endif |
8403 | #ifdef EUSERS |
8404 | case EUSERS: return DRFLAC_ERROR; |
8405 | #endif |
8406 | #ifdef ENOTSOCK |
8407 | case ENOTSOCK: return DRFLAC_NOT_SOCKET; |
8408 | #endif |
8409 | #ifdef EDESTADDRREQ |
8410 | case EDESTADDRREQ: return DRFLAC_NO_ADDRESS; |
8411 | #endif |
8412 | #ifdef EMSGSIZE |
8413 | case EMSGSIZE: return DRFLAC_TOO_BIG; |
8414 | #endif |
8415 | #ifdef EPROTOTYPE |
8416 | case EPROTOTYPE: return DRFLAC_BAD_PROTOCOL; |
8417 | #endif |
8418 | #ifdef ENOPROTOOPT |
8419 | case ENOPROTOOPT: return DRFLAC_PROTOCOL_UNAVAILABLE; |
8420 | #endif |
8421 | #ifdef EPROTONOSUPPORT |
8422 | case EPROTONOSUPPORT: return DRFLAC_PROTOCOL_NOT_SUPPORTED; |
8423 | #endif |
8424 | #ifdef ESOCKTNOSUPPORT |
8425 | case ESOCKTNOSUPPORT: return DRFLAC_SOCKET_NOT_SUPPORTED; |
8426 | #endif |
8427 | #ifdef EOPNOTSUPP |
8428 | case EOPNOTSUPP: return DRFLAC_INVALID_OPERATION; |
8429 | #endif |
8430 | #ifdef EPFNOSUPPORT |
8431 | case EPFNOSUPPORT: return DRFLAC_PROTOCOL_FAMILY_NOT_SUPPORTED; |
8432 | #endif |
8433 | #ifdef EAFNOSUPPORT |
8434 | case EAFNOSUPPORT: return DRFLAC_ADDRESS_FAMILY_NOT_SUPPORTED; |
8435 | #endif |
8436 | #ifdef EADDRINUSE |
8437 | case EADDRINUSE: return DRFLAC_ALREADY_IN_USE; |
8438 | #endif |
8439 | #ifdef EADDRNOTAVAIL |
8440 | case EADDRNOTAVAIL: return DRFLAC_ERROR; |
8441 | #endif |
8442 | #ifdef ENETDOWN |
8443 | case ENETDOWN: return DRFLAC_NO_NETWORK; |
8444 | #endif |
8445 | #ifdef ENETUNREACH |
8446 | case ENETUNREACH: return DRFLAC_NO_NETWORK; |
8447 | #endif |
8448 | #ifdef ENETRESET |
8449 | case ENETRESET: return DRFLAC_NO_NETWORK; |
8450 | #endif |
8451 | #ifdef ECONNABORTED |
8452 | case ECONNABORTED: return DRFLAC_NO_NETWORK; |
8453 | #endif |
8454 | #ifdef ECONNRESET |
8455 | case ECONNRESET: return DRFLAC_CONNECTION_RESET; |
8456 | #endif |
8457 | #ifdef ENOBUFS |
8458 | case ENOBUFS: return DRFLAC_NO_SPACE; |
8459 | #endif |
8460 | #ifdef EISCONN |
8461 | case EISCONN: return DRFLAC_ALREADY_CONNECTED; |
8462 | #endif |
8463 | #ifdef ENOTCONN |
8464 | case ENOTCONN: return DRFLAC_NOT_CONNECTED; |
8465 | #endif |
8466 | #ifdef ESHUTDOWN |
8467 | case ESHUTDOWN: return DRFLAC_ERROR; |
8468 | #endif |
8469 | #ifdef ETOOMANYREFS |
8470 | case ETOOMANYREFS: return DRFLAC_ERROR; |
8471 | #endif |
8472 | #ifdef ETIMEDOUT |
8473 | case ETIMEDOUT: return DRFLAC_TIMEOUT; |
8474 | #endif |
8475 | #ifdef ECONNREFUSED |
8476 | case ECONNREFUSED: return DRFLAC_CONNECTION_REFUSED; |
8477 | #endif |
8478 | #ifdef EHOSTDOWN |
8479 | case EHOSTDOWN: return DRFLAC_NO_HOST; |
8480 | #endif |
8481 | #ifdef EHOSTUNREACH |
8482 | case EHOSTUNREACH: return DRFLAC_NO_HOST; |
8483 | #endif |
8484 | #ifdef EALREADY |
8485 | case EALREADY: return DRFLAC_IN_PROGRESS; |
8486 | #endif |
8487 | #ifdef EINPROGRESS |
8488 | case EINPROGRESS: return DRFLAC_IN_PROGRESS; |
8489 | #endif |
8490 | #ifdef ESTALE |
8491 | case ESTALE: return DRFLAC_INVALID_FILE; |
8492 | #endif |
8493 | #ifdef EUCLEAN |
8494 | case EUCLEAN: return DRFLAC_ERROR; |
8495 | #endif |
8496 | #ifdef ENOTNAM |
8497 | case ENOTNAM: return DRFLAC_ERROR; |
8498 | #endif |
8499 | #ifdef ENAVAIL |
8500 | case ENAVAIL: return DRFLAC_ERROR; |
8501 | #endif |
8502 | #ifdef EISNAM |
8503 | case EISNAM: return DRFLAC_ERROR; |
8504 | #endif |
8505 | #ifdef EREMOTEIO |
8506 | case EREMOTEIO: return DRFLAC_IO_ERROR; |
8507 | #endif |
8508 | #ifdef EDQUOT |
8509 | case EDQUOT: return DRFLAC_NO_SPACE; |
8510 | #endif |
8511 | #ifdef ENOMEDIUM |
8512 | case ENOMEDIUM: return DRFLAC_DOES_NOT_EXIST; |
8513 | #endif |
8514 | #ifdef EMEDIUMTYPE |
8515 | case EMEDIUMTYPE: return DRFLAC_ERROR; |
8516 | #endif |
8517 | #ifdef ECANCELED |
8518 | case ECANCELED: return DRFLAC_CANCELLED; |
8519 | #endif |
8520 | #ifdef ENOKEY |
8521 | case ENOKEY: return DRFLAC_ERROR; |
8522 | #endif |
8523 | #ifdef EKEYEXPIRED |
8524 | case EKEYEXPIRED: return DRFLAC_ERROR; |
8525 | #endif |
8526 | #ifdef EKEYREVOKED |
8527 | case EKEYREVOKED: return DRFLAC_ERROR; |
8528 | #endif |
8529 | #ifdef EKEYREJECTED |
8530 | case EKEYREJECTED: return DRFLAC_ERROR; |
8531 | #endif |
8532 | #ifdef EOWNERDEAD |
8533 | case EOWNERDEAD: return DRFLAC_ERROR; |
8534 | #endif |
8535 | #ifdef ENOTRECOVERABLE |
8536 | case ENOTRECOVERABLE: return DRFLAC_ERROR; |
8537 | #endif |
8538 | #ifdef ERFKILL |
8539 | case ERFKILL: return DRFLAC_ERROR; |
8540 | #endif |
8541 | #ifdef EHWPOISON |
8542 | case EHWPOISON: return DRFLAC_ERROR; |
8543 | #endif |
8544 | default: return DRFLAC_ERROR; |
8545 | } |
8546 | } |
8547 | |
8548 | static drflac_result drflac_fopen(FILE** ppFile, const char* pFilePath, const char* pOpenMode) |
8549 | { |
8550 | #if defined(_MSC_VER) && _MSC_VER >= 1400 |
8551 | errno_t err; |
8552 | #endif |
8553 | |
8554 | if (ppFile != NULL) { |
8555 | *ppFile = NULL; /* Safety. */ |
8556 | } |
8557 | |
8558 | if (pFilePath == NULL || pOpenMode == NULL || ppFile == NULL) { |
8559 | return DRFLAC_INVALID_ARGS; |
8560 | } |
8561 | |
8562 | #if defined(_MSC_VER) && _MSC_VER >= 1400 |
8563 | err = fopen_s(ppFile, pFilePath, pOpenMode); |
8564 | if (err != 0) { |
8565 | return drflac_result_from_errno(err); |
8566 | } |
8567 | #else |
8568 | #if defined(_WIN32) || defined(__APPLE__) |
8569 | *ppFile = fopen(pFilePath, pOpenMode); |
8570 | #else |
8571 | #if defined(_FILE_OFFSET_BITS) && _FILE_OFFSET_BITS == 64 && defined(_LARGEFILE64_SOURCE) |
8572 | *ppFile = fopen64(pFilePath, pOpenMode); |
8573 | #else |
8574 | *ppFile = fopen(pFilePath, pOpenMode); |
8575 | #endif |
8576 | #endif |
8577 | if (*ppFile == NULL) { |
8578 | drflac_result result = drflac_result_from_errno(errno); |
8579 | if (result == DRFLAC_SUCCESS) { |
8580 | result = DRFLAC_ERROR; /* Just a safety check to make sure we never ever return success when pFile == NULL. */ |
8581 | } |
8582 | |
8583 | return result; |
8584 | } |
8585 | #endif |
8586 | |
8587 | return DRFLAC_SUCCESS; |
8588 | } |
8589 | |
8590 | /* |
8591 | _wfopen() isn't always available in all compilation environments. |
8592 | |
8593 | * Windows only. |
8594 | * MSVC seems to support it universally as far back as VC6 from what I can tell (haven't checked further back). |
8595 | * MinGW-64 (both 32- and 64-bit) seems to support it. |
8596 | * MinGW wraps it in !defined(__STRICT_ANSI__). |
8597 | * OpenWatcom wraps it in !defined(_NO_EXT_KEYS). |
8598 | |
8599 | This can be reviewed as compatibility issues arise. The preference is to use _wfopen_s() and _wfopen() as opposed to the wcsrtombs() |
8600 | fallback, so if you notice your compiler not detecting this properly I'm happy to look at adding support. |
8601 | */ |
8602 | #if defined(_WIN32) |
8603 | #if defined(_MSC_VER) || defined(__MINGW64__) || (!defined(__STRICT_ANSI__) && !defined(_NO_EXT_KEYS)) |
8604 | #define DRFLAC_HAS_WFOPEN |
8605 | #endif |
8606 | #endif |
8607 | |
8608 | #ifndef DR_FLAC_NO_WCHAR |
8609 | static drflac_result drflac_wfopen(FILE** ppFile, const wchar_t* pFilePath, const wchar_t* pOpenMode, const drflac_allocation_callbacks* pAllocationCallbacks) |
8610 | { |
8611 | if (ppFile != NULL) { |
8612 | *ppFile = NULL; /* Safety. */ |
8613 | } |
8614 | |
8615 | if (pFilePath == NULL || pOpenMode == NULL || ppFile == NULL) { |
8616 | return DRFLAC_INVALID_ARGS; |
8617 | } |
8618 | |
8619 | #if defined(DRFLAC_HAS_WFOPEN) |
8620 | { |
8621 | /* Use _wfopen() on Windows. */ |
8622 | #if defined(_MSC_VER) && _MSC_VER >= 1400 |
8623 | errno_t err = _wfopen_s(ppFile, pFilePath, pOpenMode); |
8624 | if (err != 0) { |
8625 | return drflac_result_from_errno(err); |
8626 | } |
8627 | #else |
8628 | *ppFile = _wfopen(pFilePath, pOpenMode); |
8629 | if (*ppFile == NULL) { |
8630 | return drflac_result_from_errno(errno); |
8631 | } |
8632 | #endif |
8633 | (void)pAllocationCallbacks; |
8634 | } |
8635 | #else |
8636 | /* |
8637 | Use fopen() on anything other than Windows. Requires a conversion. This is annoying because |
8638 | fopen() is locale specific. The only real way I can think of to do this is with wcsrtombs(). Note |
8639 | that wcstombs() is apparently not thread-safe because it uses a static global mbstate_t object for |
8640 | maintaining state. I've checked this with -std=c89 and it works, but if somebody get's a compiler |
8641 | error I'll look into improving compatibility. |
8642 | */ |
8643 | |
8644 | /* |
8645 | Some compilers don't support wchar_t or wcsrtombs() which we're using below. In this case we just |
8646 | need to abort with an error. If you encounter a compiler lacking such support, add it to this list |
8647 | and submit a bug report and it'll be added to the library upstream. |
8648 | */ |
8649 | #if defined(__DJGPP__) |
8650 | { |
8651 | /* Nothing to do here. This will fall through to the error check below. */ |
8652 | } |
8653 | #else |
8654 | { |
8655 | mbstate_t mbs; |
8656 | size_t lenMB; |
8657 | const wchar_t* pFilePathTemp = pFilePath; |
8658 | char* pFilePathMB = NULL; |
8659 | char pOpenModeMB[32] = {0}; |
8660 | |
8661 | /* Get the length first. */ |
8662 | DRFLAC_ZERO_OBJECT(&mbs); |
8663 | lenMB = wcsrtombs(NULL, &pFilePathTemp, 0, &mbs); |
8664 | if (lenMB == (size_t)-1) { |
8665 | return drflac_result_from_errno(errno); |
8666 | } |
8667 | |
8668 | pFilePathMB = (char*)drflac__malloc_from_callbacks(lenMB + 1, pAllocationCallbacks); |
8669 | if (pFilePathMB == NULL) { |
8670 | return DRFLAC_OUT_OF_MEMORY; |
8671 | } |
8672 | |
8673 | pFilePathTemp = pFilePath; |
8674 | DRFLAC_ZERO_OBJECT(&mbs); |
8675 | wcsrtombs(pFilePathMB, &pFilePathTemp, lenMB + 1, &mbs); |
8676 | |
8677 | /* The open mode should always consist of ASCII characters so we should be able to do a trivial conversion. */ |
8678 | { |
8679 | size_t i = 0; |
8680 | for (;;) { |
8681 | if (pOpenMode[i] == 0) { |
8682 | pOpenModeMB[i] = '\0'; |
8683 | break; |
8684 | } |
8685 | |
8686 | pOpenModeMB[i] = (char)pOpenMode[i]; |
8687 | i += 1; |
8688 | } |
8689 | } |
8690 | |
8691 | *ppFile = fopen(pFilePathMB, pOpenModeMB); |
8692 | |
8693 | drflac__free_from_callbacks(pFilePathMB, pAllocationCallbacks); |
8694 | } |
8695 | #endif |
8696 | |
8697 | if (*ppFile == NULL) { |
8698 | return DRFLAC_ERROR; |
8699 | } |
8700 | #endif |
8701 | |
8702 | return DRFLAC_SUCCESS; |
8703 | } |
8704 | #endif |
8705 | |
8706 | static size_t drflac__on_read_stdio(void* pUserData, void* bufferOut, size_t bytesToRead) |
8707 | { |
8708 | return fread(bufferOut, 1, bytesToRead, (FILE*)pUserData); |
8709 | } |
8710 | |
8711 | static drflac_bool32 drflac__on_seek_stdio(void* pUserData, int offset, drflac_seek_origin origin) |
8712 | { |
8713 | DRFLAC_ASSERT(offset >= 0); /* <-- Never seek backwards. */ |
8714 | |
8715 | return fseek((FILE*)pUserData, offset, (origin == drflac_seek_origin_current) ? SEEK_CUR : SEEK_SET) == 0; |
8716 | } |
8717 | |
8718 | |
8719 | DRFLAC_API drflac* drflac_open_file(const char* pFileName, const drflac_allocation_callbacks* pAllocationCallbacks) |
8720 | { |
8721 | drflac* pFlac; |
8722 | FILE* pFile; |
8723 | |
8724 | if (drflac_fopen(&pFile, pFileName, "rb") != DRFLAC_SUCCESS) { |
8725 | return NULL; |
8726 | } |
8727 | |
8728 | pFlac = drflac_open(drflac__on_read_stdio, drflac__on_seek_stdio, (void*)pFile, pAllocationCallbacks); |
8729 | if (pFlac == NULL) { |
8730 | fclose(pFile); |
8731 | return NULL; |
8732 | } |
8733 | |
8734 | return pFlac; |
8735 | } |
8736 | |
8737 | #ifndef DR_FLAC_NO_WCHAR |
8738 | DRFLAC_API drflac* drflac_open_file_w(const wchar_t* pFileName, const drflac_allocation_callbacks* pAllocationCallbacks) |
8739 | { |
8740 | drflac* pFlac; |
8741 | FILE* pFile; |
8742 | |
8743 | if (drflac_wfopen(&pFile, pFileName, L"rb", pAllocationCallbacks) != DRFLAC_SUCCESS) { |
8744 | return NULL; |
8745 | } |
8746 | |
8747 | pFlac = drflac_open(drflac__on_read_stdio, drflac__on_seek_stdio, (void*)pFile, pAllocationCallbacks); |
8748 | if (pFlac == NULL) { |
8749 | fclose(pFile); |
8750 | return NULL; |
8751 | } |
8752 | |
8753 | return pFlac; |
8754 | } |
8755 | #endif |
8756 | |
8757 | DRFLAC_API drflac* drflac_open_file_with_metadata(const char* pFileName, drflac_meta_proc onMeta, void* pUserData, const drflac_allocation_callbacks* pAllocationCallbacks) |
8758 | { |
8759 | drflac* pFlac; |
8760 | FILE* pFile; |
8761 | |
8762 | if (drflac_fopen(&pFile, pFileName, "rb") != DRFLAC_SUCCESS) { |
8763 | return NULL; |
8764 | } |
8765 | |
8766 | pFlac = drflac_open_with_metadata_private(drflac__on_read_stdio, drflac__on_seek_stdio, onMeta, drflac_container_unknown, (void*)pFile, pUserData, pAllocationCallbacks); |
8767 | if (pFlac == NULL) { |
8768 | fclose(pFile); |
8769 | return pFlac; |
8770 | } |
8771 | |
8772 | return pFlac; |
8773 | } |
8774 | |
8775 | #ifndef DR_FLAC_NO_WCHAR |
8776 | DRFLAC_API drflac* drflac_open_file_with_metadata_w(const wchar_t* pFileName, drflac_meta_proc onMeta, void* pUserData, const drflac_allocation_callbacks* pAllocationCallbacks) |
8777 | { |
8778 | drflac* pFlac; |
8779 | FILE* pFile; |
8780 | |
8781 | if (drflac_wfopen(&pFile, pFileName, L"rb", pAllocationCallbacks) != DRFLAC_SUCCESS) { |
8782 | return NULL; |
8783 | } |
8784 | |
8785 | pFlac = drflac_open_with_metadata_private(drflac__on_read_stdio, drflac__on_seek_stdio, onMeta, drflac_container_unknown, (void*)pFile, pUserData, pAllocationCallbacks); |
8786 | if (pFlac == NULL) { |
8787 | fclose(pFile); |
8788 | return pFlac; |
2ff0b512 |
8789 | } |
8790 | |
8791 | return pFlac; |
8792 | } |
9e052883 |
8793 | #endif |
8794 | #endif /* DR_FLAC_NO_STDIO */ |
2ff0b512 |
8795 | |
8796 | static size_t drflac__on_read_memory(void* pUserData, void* bufferOut, size_t bytesToRead) |
8797 | { |
8798 | drflac__memory_stream* memoryStream = (drflac__memory_stream*)pUserData; |
8799 | size_t bytesRemaining; |
8800 | |
8801 | DRFLAC_ASSERT(memoryStream != NULL); |
8802 | DRFLAC_ASSERT(memoryStream->dataSize >= memoryStream->currentReadPos); |
8803 | |
8804 | bytesRemaining = memoryStream->dataSize - memoryStream->currentReadPos; |
8805 | if (bytesToRead > bytesRemaining) { |
8806 | bytesToRead = bytesRemaining; |
8807 | } |
8808 | |
8809 | if (bytesToRead > 0) { |
8810 | DRFLAC_COPY_MEMORY(bufferOut, memoryStream->data + memoryStream->currentReadPos, bytesToRead); |
8811 | memoryStream->currentReadPos += bytesToRead; |
8812 | } |
8813 | |
8814 | return bytesToRead; |
8815 | } |
8816 | |
8817 | static drflac_bool32 drflac__on_seek_memory(void* pUserData, int offset, drflac_seek_origin origin) |
8818 | { |
8819 | drflac__memory_stream* memoryStream = (drflac__memory_stream*)pUserData; |
8820 | |
8821 | DRFLAC_ASSERT(memoryStream != NULL); |
8822 | DRFLAC_ASSERT(offset >= 0); /* <-- Never seek backwards. */ |
8823 | |
8824 | if (offset > (drflac_int64)memoryStream->dataSize) { |
8825 | return DRFLAC_FALSE; |
8826 | } |
8827 | |
8828 | if (origin == drflac_seek_origin_current) { |
8829 | if (memoryStream->currentReadPos + offset <= memoryStream->dataSize) { |
8830 | memoryStream->currentReadPos += offset; |
8831 | } else { |
8832 | return DRFLAC_FALSE; /* Trying to seek too far forward. */ |
8833 | } |
8834 | } else { |
8835 | if ((drflac_uint32)offset <= memoryStream->dataSize) { |
8836 | memoryStream->currentReadPos = offset; |
8837 | } else { |
8838 | return DRFLAC_FALSE; /* Trying to seek too far forward. */ |
8839 | } |
8840 | } |
8841 | |
8842 | return DRFLAC_TRUE; |
8843 | } |
8844 | |
8845 | DRFLAC_API drflac* drflac_open_memory(const void* pData, size_t dataSize, const drflac_allocation_callbacks* pAllocationCallbacks) |
8846 | { |
8847 | drflac__memory_stream memoryStream; |
8848 | drflac* pFlac; |
8849 | |
8850 | memoryStream.data = (const drflac_uint8*)pData; |
8851 | memoryStream.dataSize = dataSize; |
8852 | memoryStream.currentReadPos = 0; |
8853 | pFlac = drflac_open(drflac__on_read_memory, drflac__on_seek_memory, &memoryStream, pAllocationCallbacks); |
8854 | if (pFlac == NULL) { |
8855 | return NULL; |
8856 | } |
8857 | |
8858 | pFlac->memoryStream = memoryStream; |
8859 | |
8860 | /* This is an awful hack... */ |
8861 | #ifndef DR_FLAC_NO_OGG |
8862 | if (pFlac->container == drflac_container_ogg) |
8863 | { |
8864 | drflac_oggbs* oggbs = (drflac_oggbs*)pFlac->_oggbs; |
8865 | oggbs->pUserData = &pFlac->memoryStream; |
8866 | } |
8867 | else |
8868 | #endif |
8869 | { |
8870 | pFlac->bs.pUserData = &pFlac->memoryStream; |
8871 | } |
8872 | |
8873 | return pFlac; |
8874 | } |
8875 | |
8876 | 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) |
8877 | { |
8878 | drflac__memory_stream memoryStream; |
8879 | drflac* pFlac; |
8880 | |
8881 | memoryStream.data = (const drflac_uint8*)pData; |
8882 | memoryStream.dataSize = dataSize; |
8883 | memoryStream.currentReadPos = 0; |
8884 | pFlac = drflac_open_with_metadata_private(drflac__on_read_memory, drflac__on_seek_memory, onMeta, drflac_container_unknown, &memoryStream, pUserData, pAllocationCallbacks); |
8885 | if (pFlac == NULL) { |
8886 | return NULL; |
8887 | } |
8888 | |
8889 | pFlac->memoryStream = memoryStream; |
8890 | |
8891 | /* This is an awful hack... */ |
8892 | #ifndef DR_FLAC_NO_OGG |
8893 | if (pFlac->container == drflac_container_ogg) |
8894 | { |
8895 | drflac_oggbs* oggbs = (drflac_oggbs*)pFlac->_oggbs; |
8896 | oggbs->pUserData = &pFlac->memoryStream; |
8897 | } |
8898 | else |
8899 | #endif |
8900 | { |
8901 | pFlac->bs.pUserData = &pFlac->memoryStream; |
8902 | } |
8903 | |
8904 | return pFlac; |
8905 | } |
8906 | |
8907 | |
8908 | |
8909 | DRFLAC_API drflac* drflac_open(drflac_read_proc onRead, drflac_seek_proc onSeek, void* pUserData, const drflac_allocation_callbacks* pAllocationCallbacks) |
8910 | { |
8911 | return drflac_open_with_metadata_private(onRead, onSeek, NULL, drflac_container_unknown, pUserData, pUserData, pAllocationCallbacks); |
8912 | } |
8913 | DRFLAC_API drflac* drflac_open_relaxed(drflac_read_proc onRead, drflac_seek_proc onSeek, drflac_container container, void* pUserData, const drflac_allocation_callbacks* pAllocationCallbacks) |
8914 | { |
8915 | return drflac_open_with_metadata_private(onRead, onSeek, NULL, container, pUserData, pUserData, pAllocationCallbacks); |
8916 | } |
8917 | |
8918 | 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) |
8919 | { |
8920 | return drflac_open_with_metadata_private(onRead, onSeek, onMeta, drflac_container_unknown, pUserData, pUserData, pAllocationCallbacks); |
8921 | } |
8922 | 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) |
8923 | { |
8924 | return drflac_open_with_metadata_private(onRead, onSeek, onMeta, container, pUserData, pUserData, pAllocationCallbacks); |
8925 | } |
8926 | |
8927 | DRFLAC_API void drflac_close(drflac* pFlac) |
8928 | { |
8929 | if (pFlac == NULL) { |
8930 | return; |
8931 | } |
8932 | |
9e052883 |
8933 | #ifndef DR_FLAC_NO_STDIO |
8934 | /* |
8935 | If we opened the file with drflac_open_file() we will want to close the file handle. We can know whether or not drflac_open_file() |
8936 | was used by looking at the callbacks. |
8937 | */ |
8938 | if (pFlac->bs.onRead == drflac__on_read_stdio) { |
8939 | fclose((FILE*)pFlac->bs.pUserData); |
8940 | } |
8941 | |
8942 | #ifndef DR_FLAC_NO_OGG |
8943 | /* Need to clean up Ogg streams a bit differently due to the way the bit streaming is chained. */ |
8944 | if (pFlac->container == drflac_container_ogg) { |
8945 | drflac_oggbs* oggbs = (drflac_oggbs*)pFlac->_oggbs; |
8946 | DRFLAC_ASSERT(pFlac->bs.onRead == drflac__on_read_ogg); |
8947 | |
8948 | if (oggbs->onRead == drflac__on_read_stdio) { |
8949 | fclose((FILE*)oggbs->pUserData); |
8950 | } |
8951 | } |
8952 | #endif |
8953 | #endif |
8954 | |
2ff0b512 |
8955 | drflac__free_from_callbacks(pFlac, &pFlac->allocationCallbacks); |
8956 | } |
8957 | |
9e052883 |
8958 | |
8959 | #if 0 |
8960 | static DRFLAC_INLINE void drflac_read_pcm_frames_s32__decode_left_side__reference(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int32* pOutputSamples) |
8961 | { |
8962 | drflac_uint64 i; |
8963 | for (i = 0; i < frameCount; ++i) { |
8964 | drflac_uint32 left = (drflac_uint32)pInputSamples0[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); |
8965 | drflac_uint32 side = (drflac_uint32)pInputSamples1[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); |
8966 | drflac_uint32 right = left - side; |
8967 | |
8968 | pOutputSamples[i*2+0] = (drflac_int32)left; |
8969 | pOutputSamples[i*2+1] = (drflac_int32)right; |
8970 | } |
8971 | } |
8972 | #endif |
8973 | |
2ff0b512 |
8974 | 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) |
8975 | { |
8976 | drflac_uint64 i; |
8977 | drflac_uint64 frameCount4 = frameCount >> 2; |
8978 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
8979 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
8980 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
8981 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
8982 | |
8983 | for (i = 0; i < frameCount4; ++i) { |
8984 | drflac_uint32 left0 = pInputSamples0U32[i*4+0] << shift0; |
8985 | drflac_uint32 left1 = pInputSamples0U32[i*4+1] << shift0; |
8986 | drflac_uint32 left2 = pInputSamples0U32[i*4+2] << shift0; |
8987 | drflac_uint32 left3 = pInputSamples0U32[i*4+3] << shift0; |
8988 | |
8989 | drflac_uint32 side0 = pInputSamples1U32[i*4+0] << shift1; |
8990 | drflac_uint32 side1 = pInputSamples1U32[i*4+1] << shift1; |
8991 | drflac_uint32 side2 = pInputSamples1U32[i*4+2] << shift1; |
8992 | drflac_uint32 side3 = pInputSamples1U32[i*4+3] << shift1; |
8993 | |
8994 | drflac_uint32 right0 = left0 - side0; |
8995 | drflac_uint32 right1 = left1 - side1; |
8996 | drflac_uint32 right2 = left2 - side2; |
8997 | drflac_uint32 right3 = left3 - side3; |
8998 | |
8999 | pOutputSamples[i*8+0] = (drflac_int32)left0; |
9000 | pOutputSamples[i*8+1] = (drflac_int32)right0; |
9001 | pOutputSamples[i*8+2] = (drflac_int32)left1; |
9002 | pOutputSamples[i*8+3] = (drflac_int32)right1; |
9003 | pOutputSamples[i*8+4] = (drflac_int32)left2; |
9004 | pOutputSamples[i*8+5] = (drflac_int32)right2; |
9005 | pOutputSamples[i*8+6] = (drflac_int32)left3; |
9006 | pOutputSamples[i*8+7] = (drflac_int32)right3; |
9007 | } |
9008 | |
9009 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
9010 | drflac_uint32 left = pInputSamples0U32[i] << shift0; |
9011 | drflac_uint32 side = pInputSamples1U32[i] << shift1; |
9012 | drflac_uint32 right = left - side; |
9013 | |
9014 | pOutputSamples[i*2+0] = (drflac_int32)left; |
9015 | pOutputSamples[i*2+1] = (drflac_int32)right; |
9016 | } |
9017 | } |
9018 | |
9019 | #if defined(DRFLAC_SUPPORT_SSE2) |
9020 | 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) |
9021 | { |
9022 | drflac_uint64 i; |
9023 | drflac_uint64 frameCount4 = frameCount >> 2; |
9024 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
9025 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
9026 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
9027 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
9028 | |
9029 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
9030 | |
9031 | for (i = 0; i < frameCount4; ++i) { |
9032 | __m128i left = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), shift0); |
9033 | __m128i side = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), shift1); |
9034 | __m128i right = _mm_sub_epi32(left, side); |
9035 | |
9036 | _mm_storeu_si128((__m128i*)(pOutputSamples + i*8 + 0), _mm_unpacklo_epi32(left, right)); |
9037 | _mm_storeu_si128((__m128i*)(pOutputSamples + i*8 + 4), _mm_unpackhi_epi32(left, right)); |
9038 | } |
9039 | |
9040 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
9041 | drflac_uint32 left = pInputSamples0U32[i] << shift0; |
9042 | drflac_uint32 side = pInputSamples1U32[i] << shift1; |
9043 | drflac_uint32 right = left - side; |
9044 | |
9045 | pOutputSamples[i*2+0] = (drflac_int32)left; |
9046 | pOutputSamples[i*2+1] = (drflac_int32)right; |
9047 | } |
9048 | } |
9049 | #endif |
9050 | |
9051 | #if defined(DRFLAC_SUPPORT_NEON) |
9052 | 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) |
9053 | { |
9054 | drflac_uint64 i; |
9055 | drflac_uint64 frameCount4 = frameCount >> 2; |
9056 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
9057 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
9058 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
9059 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
9060 | int32x4_t shift0_4; |
9061 | int32x4_t shift1_4; |
9062 | |
9063 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
9064 | |
9065 | shift0_4 = vdupq_n_s32(shift0); |
9066 | shift1_4 = vdupq_n_s32(shift1); |
9067 | |
9068 | for (i = 0; i < frameCount4; ++i) { |
9069 | uint32x4_t left; |
9070 | uint32x4_t side; |
9071 | uint32x4_t right; |
9072 | |
9073 | left = vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), shift0_4); |
9074 | side = vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), shift1_4); |
9075 | right = vsubq_u32(left, side); |
9076 | |
9077 | drflac__vst2q_u32((drflac_uint32*)pOutputSamples + i*8, vzipq_u32(left, right)); |
9078 | } |
9079 | |
9080 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
9081 | drflac_uint32 left = pInputSamples0U32[i] << shift0; |
9082 | drflac_uint32 side = pInputSamples1U32[i] << shift1; |
9083 | drflac_uint32 right = left - side; |
9084 | |
9085 | pOutputSamples[i*2+0] = (drflac_int32)left; |
9086 | pOutputSamples[i*2+1] = (drflac_int32)right; |
9087 | } |
9088 | } |
9089 | #endif |
9090 | |
9091 | 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) |
9092 | { |
9093 | #if defined(DRFLAC_SUPPORT_SSE2) |
9094 | if (drflac__gIsSSE2Supported && pFlac->bitsPerSample <= 24) { |
9095 | drflac_read_pcm_frames_s32__decode_left_side__sse2(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
9096 | } else |
9097 | #elif defined(DRFLAC_SUPPORT_NEON) |
9098 | if (drflac__gIsNEONSupported && pFlac->bitsPerSample <= 24) { |
9099 | drflac_read_pcm_frames_s32__decode_left_side__neon(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
9100 | } else |
9101 | #endif |
9102 | { |
9103 | /* Scalar fallback. */ |
9e052883 |
9104 | #if 0 |
9105 | drflac_read_pcm_frames_s32__decode_left_side__reference(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
9106 | #else |
2ff0b512 |
9107 | drflac_read_pcm_frames_s32__decode_left_side__scalar(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
9e052883 |
9108 | #endif |
2ff0b512 |
9109 | } |
9110 | } |
9111 | |
9112 | |
9e052883 |
9113 | #if 0 |
9114 | static DRFLAC_INLINE void drflac_read_pcm_frames_s32__decode_right_side__reference(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int32* pOutputSamples) |
9115 | { |
9116 | drflac_uint64 i; |
9117 | for (i = 0; i < frameCount; ++i) { |
9118 | drflac_uint32 side = (drflac_uint32)pInputSamples0[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); |
9119 | drflac_uint32 right = (drflac_uint32)pInputSamples1[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); |
9120 | drflac_uint32 left = right + side; |
9121 | |
9122 | pOutputSamples[i*2+0] = (drflac_int32)left; |
9123 | pOutputSamples[i*2+1] = (drflac_int32)right; |
9124 | } |
9125 | } |
9126 | #endif |
9127 | |
2ff0b512 |
9128 | 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) |
9129 | { |
9130 | drflac_uint64 i; |
9131 | drflac_uint64 frameCount4 = frameCount >> 2; |
9132 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
9133 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
9134 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
9135 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
9136 | |
9137 | for (i = 0; i < frameCount4; ++i) { |
9138 | drflac_uint32 side0 = pInputSamples0U32[i*4+0] << shift0; |
9139 | drflac_uint32 side1 = pInputSamples0U32[i*4+1] << shift0; |
9140 | drflac_uint32 side2 = pInputSamples0U32[i*4+2] << shift0; |
9141 | drflac_uint32 side3 = pInputSamples0U32[i*4+3] << shift0; |
9142 | |
9143 | drflac_uint32 right0 = pInputSamples1U32[i*4+0] << shift1; |
9144 | drflac_uint32 right1 = pInputSamples1U32[i*4+1] << shift1; |
9145 | drflac_uint32 right2 = pInputSamples1U32[i*4+2] << shift1; |
9146 | drflac_uint32 right3 = pInputSamples1U32[i*4+3] << shift1; |
9147 | |
9148 | drflac_uint32 left0 = right0 + side0; |
9149 | drflac_uint32 left1 = right1 + side1; |
9150 | drflac_uint32 left2 = right2 + side2; |
9151 | drflac_uint32 left3 = right3 + side3; |
9152 | |
9153 | pOutputSamples[i*8+0] = (drflac_int32)left0; |
9154 | pOutputSamples[i*8+1] = (drflac_int32)right0; |
9155 | pOutputSamples[i*8+2] = (drflac_int32)left1; |
9156 | pOutputSamples[i*8+3] = (drflac_int32)right1; |
9157 | pOutputSamples[i*8+4] = (drflac_int32)left2; |
9158 | pOutputSamples[i*8+5] = (drflac_int32)right2; |
9159 | pOutputSamples[i*8+6] = (drflac_int32)left3; |
9160 | pOutputSamples[i*8+7] = (drflac_int32)right3; |
9161 | } |
9162 | |
9163 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
9164 | drflac_uint32 side = pInputSamples0U32[i] << shift0; |
9165 | drflac_uint32 right = pInputSamples1U32[i] << shift1; |
9166 | drflac_uint32 left = right + side; |
9167 | |
9168 | pOutputSamples[i*2+0] = (drflac_int32)left; |
9169 | pOutputSamples[i*2+1] = (drflac_int32)right; |
9170 | } |
9171 | } |
9172 | |
9173 | #if defined(DRFLAC_SUPPORT_SSE2) |
9174 | 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) |
9175 | { |
9176 | drflac_uint64 i; |
9177 | drflac_uint64 frameCount4 = frameCount >> 2; |
9178 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
9179 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
9180 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
9181 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
9182 | |
9183 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
9184 | |
9185 | for (i = 0; i < frameCount4; ++i) { |
9186 | __m128i side = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), shift0); |
9187 | __m128i right = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), shift1); |
9188 | __m128i left = _mm_add_epi32(right, side); |
9189 | |
9190 | _mm_storeu_si128((__m128i*)(pOutputSamples + i*8 + 0), _mm_unpacklo_epi32(left, right)); |
9191 | _mm_storeu_si128((__m128i*)(pOutputSamples + i*8 + 4), _mm_unpackhi_epi32(left, right)); |
9192 | } |
9193 | |
9194 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
9195 | drflac_uint32 side = pInputSamples0U32[i] << shift0; |
9196 | drflac_uint32 right = pInputSamples1U32[i] << shift1; |
9197 | drflac_uint32 left = right + side; |
9198 | |
9199 | pOutputSamples[i*2+0] = (drflac_int32)left; |
9200 | pOutputSamples[i*2+1] = (drflac_int32)right; |
9201 | } |
9202 | } |
9203 | #endif |
9204 | |
9205 | #if defined(DRFLAC_SUPPORT_NEON) |
9206 | 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) |
9207 | { |
9208 | drflac_uint64 i; |
9209 | drflac_uint64 frameCount4 = frameCount >> 2; |
9210 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
9211 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
9212 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
9213 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
9214 | int32x4_t shift0_4; |
9215 | int32x4_t shift1_4; |
9216 | |
9217 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
9218 | |
9219 | shift0_4 = vdupq_n_s32(shift0); |
9220 | shift1_4 = vdupq_n_s32(shift1); |
9221 | |
9222 | for (i = 0; i < frameCount4; ++i) { |
9223 | uint32x4_t side; |
9224 | uint32x4_t right; |
9225 | uint32x4_t left; |
9226 | |
9227 | side = vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), shift0_4); |
9228 | right = vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), shift1_4); |
9229 | left = vaddq_u32(right, side); |
9230 | |
9231 | drflac__vst2q_u32((drflac_uint32*)pOutputSamples + i*8, vzipq_u32(left, right)); |
9232 | } |
9233 | |
9234 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
9235 | drflac_uint32 side = pInputSamples0U32[i] << shift0; |
9236 | drflac_uint32 right = pInputSamples1U32[i] << shift1; |
9237 | drflac_uint32 left = right + side; |
9238 | |
9239 | pOutputSamples[i*2+0] = (drflac_int32)left; |
9240 | pOutputSamples[i*2+1] = (drflac_int32)right; |
9241 | } |
9242 | } |
9243 | #endif |
9244 | |
9245 | 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) |
9246 | { |
9247 | #if defined(DRFLAC_SUPPORT_SSE2) |
9248 | if (drflac__gIsSSE2Supported && pFlac->bitsPerSample <= 24) { |
9249 | drflac_read_pcm_frames_s32__decode_right_side__sse2(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
9250 | } else |
9251 | #elif defined(DRFLAC_SUPPORT_NEON) |
9252 | if (drflac__gIsNEONSupported && pFlac->bitsPerSample <= 24) { |
9253 | drflac_read_pcm_frames_s32__decode_right_side__neon(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
9254 | } else |
9255 | #endif |
9256 | { |
9257 | /* Scalar fallback. */ |
9e052883 |
9258 | #if 0 |
9259 | drflac_read_pcm_frames_s32__decode_right_side__reference(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
9260 | #else |
2ff0b512 |
9261 | drflac_read_pcm_frames_s32__decode_right_side__scalar(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
9e052883 |
9262 | #endif |
2ff0b512 |
9263 | } |
9264 | } |
9265 | |
9266 | |
9e052883 |
9267 | #if 0 |
9268 | static DRFLAC_INLINE void drflac_read_pcm_frames_s32__decode_mid_side__reference(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int32* pOutputSamples) |
9269 | { |
9270 | for (drflac_uint64 i = 0; i < frameCount; ++i) { |
9271 | drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
9272 | drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
9273 | |
9274 | mid = (mid << 1) | (side & 0x01); |
9275 | |
9276 | pOutputSamples[i*2+0] = (drflac_int32)((drflac_uint32)((drflac_int32)(mid + side) >> 1) << unusedBitsPerSample); |
9277 | pOutputSamples[i*2+1] = (drflac_int32)((drflac_uint32)((drflac_int32)(mid - side) >> 1) << unusedBitsPerSample); |
9278 | } |
9279 | } |
9280 | #endif |
9281 | |
2ff0b512 |
9282 | 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) |
9283 | { |
9284 | drflac_uint64 i; |
9285 | drflac_uint64 frameCount4 = frameCount >> 2; |
9286 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
9287 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
9288 | drflac_int32 shift = unusedBitsPerSample; |
9289 | |
9290 | if (shift > 0) { |
9291 | shift -= 1; |
9292 | for (i = 0; i < frameCount4; ++i) { |
9293 | drflac_uint32 temp0L; |
9294 | drflac_uint32 temp1L; |
9295 | drflac_uint32 temp2L; |
9296 | drflac_uint32 temp3L; |
9297 | drflac_uint32 temp0R; |
9298 | drflac_uint32 temp1R; |
9299 | drflac_uint32 temp2R; |
9300 | drflac_uint32 temp3R; |
9301 | |
9302 | drflac_uint32 mid0 = pInputSamples0U32[i*4+0] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
9303 | drflac_uint32 mid1 = pInputSamples0U32[i*4+1] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
9304 | drflac_uint32 mid2 = pInputSamples0U32[i*4+2] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
9305 | drflac_uint32 mid3 = pInputSamples0U32[i*4+3] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
9306 | |
9307 | drflac_uint32 side0 = pInputSamples1U32[i*4+0] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
9308 | drflac_uint32 side1 = pInputSamples1U32[i*4+1] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
9309 | drflac_uint32 side2 = pInputSamples1U32[i*4+2] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
9310 | drflac_uint32 side3 = pInputSamples1U32[i*4+3] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
9311 | |
9312 | mid0 = (mid0 << 1) | (side0 & 0x01); |
9313 | mid1 = (mid1 << 1) | (side1 & 0x01); |
9314 | mid2 = (mid2 << 1) | (side2 & 0x01); |
9315 | mid3 = (mid3 << 1) | (side3 & 0x01); |
9316 | |
9317 | temp0L = (mid0 + side0) << shift; |
9318 | temp1L = (mid1 + side1) << shift; |
9319 | temp2L = (mid2 + side2) << shift; |
9320 | temp3L = (mid3 + side3) << shift; |
9321 | |
9322 | temp0R = (mid0 - side0) << shift; |
9323 | temp1R = (mid1 - side1) << shift; |
9324 | temp2R = (mid2 - side2) << shift; |
9325 | temp3R = (mid3 - side3) << shift; |
9326 | |
9327 | pOutputSamples[i*8+0] = (drflac_int32)temp0L; |
9328 | pOutputSamples[i*8+1] = (drflac_int32)temp0R; |
9329 | pOutputSamples[i*8+2] = (drflac_int32)temp1L; |
9330 | pOutputSamples[i*8+3] = (drflac_int32)temp1R; |
9331 | pOutputSamples[i*8+4] = (drflac_int32)temp2L; |
9332 | pOutputSamples[i*8+5] = (drflac_int32)temp2R; |
9333 | pOutputSamples[i*8+6] = (drflac_int32)temp3L; |
9334 | pOutputSamples[i*8+7] = (drflac_int32)temp3R; |
9335 | } |
9336 | } else { |
9337 | for (i = 0; i < frameCount4; ++i) { |
9338 | drflac_uint32 temp0L; |
9339 | drflac_uint32 temp1L; |
9340 | drflac_uint32 temp2L; |
9341 | drflac_uint32 temp3L; |
9342 | drflac_uint32 temp0R; |
9343 | drflac_uint32 temp1R; |
9344 | drflac_uint32 temp2R; |
9345 | drflac_uint32 temp3R; |
9346 | |
9347 | drflac_uint32 mid0 = pInputSamples0U32[i*4+0] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
9348 | drflac_uint32 mid1 = pInputSamples0U32[i*4+1] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
9349 | drflac_uint32 mid2 = pInputSamples0U32[i*4+2] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
9350 | drflac_uint32 mid3 = pInputSamples0U32[i*4+3] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
9351 | |
9352 | drflac_uint32 side0 = pInputSamples1U32[i*4+0] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
9353 | drflac_uint32 side1 = pInputSamples1U32[i*4+1] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
9354 | drflac_uint32 side2 = pInputSamples1U32[i*4+2] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
9355 | drflac_uint32 side3 = pInputSamples1U32[i*4+3] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
9356 | |
9357 | mid0 = (mid0 << 1) | (side0 & 0x01); |
9358 | mid1 = (mid1 << 1) | (side1 & 0x01); |
9359 | mid2 = (mid2 << 1) | (side2 & 0x01); |
9360 | mid3 = (mid3 << 1) | (side3 & 0x01); |
9361 | |
9362 | temp0L = (drflac_uint32)((drflac_int32)(mid0 + side0) >> 1); |
9363 | temp1L = (drflac_uint32)((drflac_int32)(mid1 + side1) >> 1); |
9364 | temp2L = (drflac_uint32)((drflac_int32)(mid2 + side2) >> 1); |
9365 | temp3L = (drflac_uint32)((drflac_int32)(mid3 + side3) >> 1); |
9366 | |
9367 | temp0R = (drflac_uint32)((drflac_int32)(mid0 - side0) >> 1); |
9368 | temp1R = (drflac_uint32)((drflac_int32)(mid1 - side1) >> 1); |
9369 | temp2R = (drflac_uint32)((drflac_int32)(mid2 - side2) >> 1); |
9370 | temp3R = (drflac_uint32)((drflac_int32)(mid3 - side3) >> 1); |
9371 | |
9372 | pOutputSamples[i*8+0] = (drflac_int32)temp0L; |
9373 | pOutputSamples[i*8+1] = (drflac_int32)temp0R; |
9374 | pOutputSamples[i*8+2] = (drflac_int32)temp1L; |
9375 | pOutputSamples[i*8+3] = (drflac_int32)temp1R; |
9376 | pOutputSamples[i*8+4] = (drflac_int32)temp2L; |
9377 | pOutputSamples[i*8+5] = (drflac_int32)temp2R; |
9378 | pOutputSamples[i*8+6] = (drflac_int32)temp3L; |
9379 | pOutputSamples[i*8+7] = (drflac_int32)temp3R; |
9380 | } |
9381 | } |
9382 | |
9383 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
9384 | drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
9385 | drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
9386 | |
9387 | mid = (mid << 1) | (side & 0x01); |
9388 | |
9389 | pOutputSamples[i*2+0] = (drflac_int32)((drflac_uint32)((drflac_int32)(mid + side) >> 1) << unusedBitsPerSample); |
9390 | pOutputSamples[i*2+1] = (drflac_int32)((drflac_uint32)((drflac_int32)(mid - side) >> 1) << unusedBitsPerSample); |
9391 | } |
9392 | } |
9393 | |
9394 | #if defined(DRFLAC_SUPPORT_SSE2) |
9395 | 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) |
9396 | { |
9397 | drflac_uint64 i; |
9398 | drflac_uint64 frameCount4 = frameCount >> 2; |
9399 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
9400 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
9401 | drflac_int32 shift = unusedBitsPerSample; |
9402 | |
9403 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
9404 | |
9405 | if (shift == 0) { |
9406 | for (i = 0; i < frameCount4; ++i) { |
9407 | __m128i mid; |
9408 | __m128i side; |
9409 | __m128i left; |
9410 | __m128i right; |
9411 | |
9412 | mid = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); |
9413 | side = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); |
9414 | |
9415 | mid = _mm_or_si128(_mm_slli_epi32(mid, 1), _mm_and_si128(side, _mm_set1_epi32(0x01))); |
9416 | |
9417 | left = _mm_srai_epi32(_mm_add_epi32(mid, side), 1); |
9418 | right = _mm_srai_epi32(_mm_sub_epi32(mid, side), 1); |
9419 | |
9420 | _mm_storeu_si128((__m128i*)(pOutputSamples + i*8 + 0), _mm_unpacklo_epi32(left, right)); |
9421 | _mm_storeu_si128((__m128i*)(pOutputSamples + i*8 + 4), _mm_unpackhi_epi32(left, right)); |
9422 | } |
9423 | |
9424 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
9425 | drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
9426 | drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
9427 | |
9428 | mid = (mid << 1) | (side & 0x01); |
9429 | |
9430 | pOutputSamples[i*2+0] = (drflac_int32)(mid + side) >> 1; |
9431 | pOutputSamples[i*2+1] = (drflac_int32)(mid - side) >> 1; |
9432 | } |
9433 | } else { |
9434 | shift -= 1; |
9435 | for (i = 0; i < frameCount4; ++i) { |
9436 | __m128i mid; |
9437 | __m128i side; |
9438 | __m128i left; |
9439 | __m128i right; |
9440 | |
9441 | mid = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); |
9442 | side = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); |
9443 | |
9444 | mid = _mm_or_si128(_mm_slli_epi32(mid, 1), _mm_and_si128(side, _mm_set1_epi32(0x01))); |
9445 | |
9446 | left = _mm_slli_epi32(_mm_add_epi32(mid, side), shift); |
9447 | right = _mm_slli_epi32(_mm_sub_epi32(mid, side), shift); |
9448 | |
9449 | _mm_storeu_si128((__m128i*)(pOutputSamples + i*8 + 0), _mm_unpacklo_epi32(left, right)); |
9450 | _mm_storeu_si128((__m128i*)(pOutputSamples + i*8 + 4), _mm_unpackhi_epi32(left, right)); |
9451 | } |
9452 | |
9453 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
9454 | drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
9455 | drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
9456 | |
9457 | mid = (mid << 1) | (side & 0x01); |
9458 | |
9459 | pOutputSamples[i*2+0] = (drflac_int32)((mid + side) << shift); |
9460 | pOutputSamples[i*2+1] = (drflac_int32)((mid - side) << shift); |
9461 | } |
9462 | } |
9463 | } |
9464 | #endif |
9465 | |
9466 | #if defined(DRFLAC_SUPPORT_NEON) |
9467 | 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) |
9468 | { |
9469 | drflac_uint64 i; |
9470 | drflac_uint64 frameCount4 = frameCount >> 2; |
9471 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
9472 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
9473 | drflac_int32 shift = unusedBitsPerSample; |
9474 | int32x4_t wbpsShift0_4; /* wbps = Wasted Bits Per Sample */ |
9475 | int32x4_t wbpsShift1_4; /* wbps = Wasted Bits Per Sample */ |
9476 | uint32x4_t one4; |
9477 | |
9478 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
9479 | |
9480 | wbpsShift0_4 = vdupq_n_s32(pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); |
9481 | wbpsShift1_4 = vdupq_n_s32(pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); |
9482 | one4 = vdupq_n_u32(1); |
9483 | |
9484 | if (shift == 0) { |
9485 | for (i = 0; i < frameCount4; ++i) { |
9486 | uint32x4_t mid; |
9487 | uint32x4_t side; |
9488 | int32x4_t left; |
9489 | int32x4_t right; |
9490 | |
9491 | mid = vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), wbpsShift0_4); |
9492 | side = vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), wbpsShift1_4); |
9493 | |
9494 | mid = vorrq_u32(vshlq_n_u32(mid, 1), vandq_u32(side, one4)); |
9495 | |
9496 | left = vshrq_n_s32(vreinterpretq_s32_u32(vaddq_u32(mid, side)), 1); |
9497 | right = vshrq_n_s32(vreinterpretq_s32_u32(vsubq_u32(mid, side)), 1); |
9498 | |
9499 | drflac__vst2q_s32(pOutputSamples + i*8, vzipq_s32(left, right)); |
9500 | } |
9501 | |
9502 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
9503 | drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
9504 | drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
9505 | |
9506 | mid = (mid << 1) | (side & 0x01); |
9507 | |
9508 | pOutputSamples[i*2+0] = (drflac_int32)(mid + side) >> 1; |
9509 | pOutputSamples[i*2+1] = (drflac_int32)(mid - side) >> 1; |
9510 | } |
9511 | } else { |
9512 | int32x4_t shift4; |
9513 | |
9514 | shift -= 1; |
9515 | shift4 = vdupq_n_s32(shift); |
9516 | |
9517 | for (i = 0; i < frameCount4; ++i) { |
9518 | uint32x4_t mid; |
9519 | uint32x4_t side; |
9520 | int32x4_t left; |
9521 | int32x4_t right; |
9522 | |
9523 | mid = vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), wbpsShift0_4); |
9524 | side = vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), wbpsShift1_4); |
9525 | |
9526 | mid = vorrq_u32(vshlq_n_u32(mid, 1), vandq_u32(side, one4)); |
9527 | |
9528 | left = vreinterpretq_s32_u32(vshlq_u32(vaddq_u32(mid, side), shift4)); |
9529 | right = vreinterpretq_s32_u32(vshlq_u32(vsubq_u32(mid, side), shift4)); |
9530 | |
9531 | drflac__vst2q_s32(pOutputSamples + i*8, vzipq_s32(left, right)); |
9532 | } |
9533 | |
9534 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
9535 | drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
9536 | drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
9537 | |
9538 | mid = (mid << 1) | (side & 0x01); |
9539 | |
9540 | pOutputSamples[i*2+0] = (drflac_int32)((mid + side) << shift); |
9541 | pOutputSamples[i*2+1] = (drflac_int32)((mid - side) << shift); |
9542 | } |
9543 | } |
9544 | } |
9545 | #endif |
9546 | |
9547 | 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) |
9548 | { |
9549 | #if defined(DRFLAC_SUPPORT_SSE2) |
9550 | if (drflac__gIsSSE2Supported && pFlac->bitsPerSample <= 24) { |
9551 | drflac_read_pcm_frames_s32__decode_mid_side__sse2(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
9552 | } else |
9553 | #elif defined(DRFLAC_SUPPORT_NEON) |
9554 | if (drflac__gIsNEONSupported && pFlac->bitsPerSample <= 24) { |
9555 | drflac_read_pcm_frames_s32__decode_mid_side__neon(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
9556 | } else |
9557 | #endif |
9558 | { |
9559 | /* Scalar fallback. */ |
9e052883 |
9560 | #if 0 |
9561 | drflac_read_pcm_frames_s32__decode_mid_side__reference(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
9562 | #else |
2ff0b512 |
9563 | drflac_read_pcm_frames_s32__decode_mid_side__scalar(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
9e052883 |
9564 | #endif |
2ff0b512 |
9565 | } |
9566 | } |
9567 | |
9568 | |
9e052883 |
9569 | #if 0 |
9570 | static DRFLAC_INLINE void drflac_read_pcm_frames_s32__decode_independent_stereo__reference(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int32* pOutputSamples) |
9571 | { |
9572 | for (drflac_uint64 i = 0; i < frameCount; ++i) { |
9573 | pOutputSamples[i*2+0] = (drflac_int32)((drflac_uint32)pInputSamples0[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample)); |
9574 | pOutputSamples[i*2+1] = (drflac_int32)((drflac_uint32)pInputSamples1[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample)); |
9575 | } |
9576 | } |
9577 | #endif |
9578 | |
2ff0b512 |
9579 | 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) |
9580 | { |
9581 | drflac_uint64 i; |
9582 | drflac_uint64 frameCount4 = frameCount >> 2; |
9583 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
9584 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
9585 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
9586 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
9587 | |
9588 | for (i = 0; i < frameCount4; ++i) { |
9589 | drflac_uint32 tempL0 = pInputSamples0U32[i*4+0] << shift0; |
9590 | drflac_uint32 tempL1 = pInputSamples0U32[i*4+1] << shift0; |
9591 | drflac_uint32 tempL2 = pInputSamples0U32[i*4+2] << shift0; |
9592 | drflac_uint32 tempL3 = pInputSamples0U32[i*4+3] << shift0; |
9593 | |
9594 | drflac_uint32 tempR0 = pInputSamples1U32[i*4+0] << shift1; |
9595 | drflac_uint32 tempR1 = pInputSamples1U32[i*4+1] << shift1; |
9596 | drflac_uint32 tempR2 = pInputSamples1U32[i*4+2] << shift1; |
9597 | drflac_uint32 tempR3 = pInputSamples1U32[i*4+3] << shift1; |
9598 | |
9599 | pOutputSamples[i*8+0] = (drflac_int32)tempL0; |
9600 | pOutputSamples[i*8+1] = (drflac_int32)tempR0; |
9601 | pOutputSamples[i*8+2] = (drflac_int32)tempL1; |
9602 | pOutputSamples[i*8+3] = (drflac_int32)tempR1; |
9603 | pOutputSamples[i*8+4] = (drflac_int32)tempL2; |
9604 | pOutputSamples[i*8+5] = (drflac_int32)tempR2; |
9605 | pOutputSamples[i*8+6] = (drflac_int32)tempL3; |
9606 | pOutputSamples[i*8+7] = (drflac_int32)tempR3; |
9607 | } |
9608 | |
9609 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
9610 | pOutputSamples[i*2+0] = (drflac_int32)(pInputSamples0U32[i] << shift0); |
9611 | pOutputSamples[i*2+1] = (drflac_int32)(pInputSamples1U32[i] << shift1); |
9612 | } |
9613 | } |
9614 | |
9615 | #if defined(DRFLAC_SUPPORT_SSE2) |
9616 | 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) |
9617 | { |
9618 | drflac_uint64 i; |
9619 | drflac_uint64 frameCount4 = frameCount >> 2; |
9620 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
9621 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
9622 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
9623 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
9624 | |
9625 | for (i = 0; i < frameCount4; ++i) { |
9626 | __m128i left = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), shift0); |
9627 | __m128i right = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), shift1); |
9628 | |
9629 | _mm_storeu_si128((__m128i*)(pOutputSamples + i*8 + 0), _mm_unpacklo_epi32(left, right)); |
9630 | _mm_storeu_si128((__m128i*)(pOutputSamples + i*8 + 4), _mm_unpackhi_epi32(left, right)); |
9631 | } |
9632 | |
9633 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
9634 | pOutputSamples[i*2+0] = (drflac_int32)(pInputSamples0U32[i] << shift0); |
9635 | pOutputSamples[i*2+1] = (drflac_int32)(pInputSamples1U32[i] << shift1); |
9636 | } |
9637 | } |
9638 | #endif |
9639 | |
9640 | #if defined(DRFLAC_SUPPORT_NEON) |
9641 | 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) |
9642 | { |
9643 | drflac_uint64 i; |
9644 | drflac_uint64 frameCount4 = frameCount >> 2; |
9645 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
9646 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
9647 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
9648 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
9649 | |
9650 | int32x4_t shift4_0 = vdupq_n_s32(shift0); |
9651 | int32x4_t shift4_1 = vdupq_n_s32(shift1); |
9652 | |
9653 | for (i = 0; i < frameCount4; ++i) { |
9654 | int32x4_t left; |
9655 | int32x4_t right; |
9656 | |
9657 | left = vreinterpretq_s32_u32(vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), shift4_0)); |
9658 | right = vreinterpretq_s32_u32(vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), shift4_1)); |
9659 | |
9660 | drflac__vst2q_s32(pOutputSamples + i*8, vzipq_s32(left, right)); |
9661 | } |
9662 | |
9663 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
9664 | pOutputSamples[i*2+0] = (drflac_int32)(pInputSamples0U32[i] << shift0); |
9665 | pOutputSamples[i*2+1] = (drflac_int32)(pInputSamples1U32[i] << shift1); |
9666 | } |
9667 | } |
9668 | #endif |
9669 | |
9670 | 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) |
9671 | { |
9672 | #if defined(DRFLAC_SUPPORT_SSE2) |
9673 | if (drflac__gIsSSE2Supported && pFlac->bitsPerSample <= 24) { |
9674 | drflac_read_pcm_frames_s32__decode_independent_stereo__sse2(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
9675 | } else |
9676 | #elif defined(DRFLAC_SUPPORT_NEON) |
9677 | if (drflac__gIsNEONSupported && pFlac->bitsPerSample <= 24) { |
9678 | drflac_read_pcm_frames_s32__decode_independent_stereo__neon(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
9679 | } else |
9680 | #endif |
9681 | { |
9682 | /* Scalar fallback. */ |
9e052883 |
9683 | #if 0 |
9684 | drflac_read_pcm_frames_s32__decode_independent_stereo__reference(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
9685 | #else |
2ff0b512 |
9686 | drflac_read_pcm_frames_s32__decode_independent_stereo__scalar(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
9e052883 |
9687 | #endif |
2ff0b512 |
9688 | } |
9689 | } |
9690 | |
9691 | |
9692 | DRFLAC_API drflac_uint64 drflac_read_pcm_frames_s32(drflac* pFlac, drflac_uint64 framesToRead, drflac_int32* pBufferOut) |
9693 | { |
9694 | drflac_uint64 framesRead; |
9695 | drflac_uint32 unusedBitsPerSample; |
9696 | |
9697 | if (pFlac == NULL || framesToRead == 0) { |
9698 | return 0; |
9699 | } |
9700 | |
9701 | if (pBufferOut == NULL) { |
9702 | return drflac__seek_forward_by_pcm_frames(pFlac, framesToRead); |
9703 | } |
9704 | |
9705 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 32); |
9706 | unusedBitsPerSample = 32 - pFlac->bitsPerSample; |
9707 | |
9708 | framesRead = 0; |
9709 | while (framesToRead > 0) { |
9710 | /* If we've run out of samples in this frame, go to the next. */ |
9711 | if (pFlac->currentFLACFrame.pcmFramesRemaining == 0) { |
9712 | if (!drflac__read_and_decode_next_flac_frame(pFlac)) { |
9713 | break; /* Couldn't read the next frame, so just break from the loop and return. */ |
9714 | } |
9715 | } else { |
9716 | unsigned int channelCount = drflac__get_channel_count_from_channel_assignment(pFlac->currentFLACFrame.header.channelAssignment); |
9717 | drflac_uint64 iFirstPCMFrame = pFlac->currentFLACFrame.header.blockSizeInPCMFrames - pFlac->currentFLACFrame.pcmFramesRemaining; |
9718 | drflac_uint64 frameCountThisIteration = framesToRead; |
9719 | |
9720 | if (frameCountThisIteration > pFlac->currentFLACFrame.pcmFramesRemaining) { |
9721 | frameCountThisIteration = pFlac->currentFLACFrame.pcmFramesRemaining; |
9722 | } |
9723 | |
9724 | if (channelCount == 2) { |
9725 | const drflac_int32* pDecodedSamples0 = pFlac->currentFLACFrame.subframes[0].pSamplesS32 + iFirstPCMFrame; |
9726 | const drflac_int32* pDecodedSamples1 = pFlac->currentFLACFrame.subframes[1].pSamplesS32 + iFirstPCMFrame; |
9727 | |
9728 | switch (pFlac->currentFLACFrame.header.channelAssignment) |
9729 | { |
9730 | case DRFLAC_CHANNEL_ASSIGNMENT_LEFT_SIDE: |
9731 | { |
9732 | drflac_read_pcm_frames_s32__decode_left_side(pFlac, frameCountThisIteration, unusedBitsPerSample, pDecodedSamples0, pDecodedSamples1, pBufferOut); |
9733 | } break; |
9734 | |
9735 | case DRFLAC_CHANNEL_ASSIGNMENT_RIGHT_SIDE: |
9736 | { |
9737 | drflac_read_pcm_frames_s32__decode_right_side(pFlac, frameCountThisIteration, unusedBitsPerSample, pDecodedSamples0, pDecodedSamples1, pBufferOut); |
9738 | } break; |
9739 | |
9740 | case DRFLAC_CHANNEL_ASSIGNMENT_MID_SIDE: |
9741 | { |
9742 | drflac_read_pcm_frames_s32__decode_mid_side(pFlac, frameCountThisIteration, unusedBitsPerSample, pDecodedSamples0, pDecodedSamples1, pBufferOut); |
9743 | } break; |
9744 | |
9745 | case DRFLAC_CHANNEL_ASSIGNMENT_INDEPENDENT: |
9746 | default: |
9747 | { |
9748 | drflac_read_pcm_frames_s32__decode_independent_stereo(pFlac, frameCountThisIteration, unusedBitsPerSample, pDecodedSamples0, pDecodedSamples1, pBufferOut); |
9749 | } break; |
9750 | } |
9751 | } else { |
9752 | /* Generic interleaving. */ |
9753 | drflac_uint64 i; |
9754 | for (i = 0; i < frameCountThisIteration; ++i) { |
9755 | unsigned int j; |
9756 | for (j = 0; j < channelCount; ++j) { |
9757 | pBufferOut[(i*channelCount)+j] = (drflac_int32)((drflac_uint32)(pFlac->currentFLACFrame.subframes[j].pSamplesS32[iFirstPCMFrame + i]) << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[j].wastedBitsPerSample)); |
9758 | } |
9759 | } |
9760 | } |
9761 | |
9762 | framesRead += frameCountThisIteration; |
9763 | pBufferOut += frameCountThisIteration * channelCount; |
9764 | framesToRead -= frameCountThisIteration; |
9765 | pFlac->currentPCMFrame += frameCountThisIteration; |
9766 | pFlac->currentFLACFrame.pcmFramesRemaining -= (drflac_uint32)frameCountThisIteration; |
9767 | } |
9768 | } |
9769 | |
9770 | return framesRead; |
9771 | } |
9772 | |
9e052883 |
9773 | |
9774 | #if 0 |
9775 | static DRFLAC_INLINE void drflac_read_pcm_frames_s16__decode_left_side__reference(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int16* pOutputSamples) |
9776 | { |
9777 | drflac_uint64 i; |
9778 | for (i = 0; i < frameCount; ++i) { |
9779 | drflac_uint32 left = (drflac_uint32)pInputSamples0[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); |
9780 | drflac_uint32 side = (drflac_uint32)pInputSamples1[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); |
9781 | drflac_uint32 right = left - side; |
9782 | |
9783 | left >>= 16; |
9784 | right >>= 16; |
9785 | |
9786 | pOutputSamples[i*2+0] = (drflac_int16)left; |
9787 | pOutputSamples[i*2+1] = (drflac_int16)right; |
9788 | } |
9789 | } |
9790 | #endif |
9791 | |
2ff0b512 |
9792 | 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) |
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; |
9799 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
9800 | |
9801 | for (i = 0; i < frameCount4; ++i) { |
9802 | drflac_uint32 left0 = pInputSamples0U32[i*4+0] << shift0; |
9803 | drflac_uint32 left1 = pInputSamples0U32[i*4+1] << shift0; |
9804 | drflac_uint32 left2 = pInputSamples0U32[i*4+2] << shift0; |
9805 | drflac_uint32 left3 = pInputSamples0U32[i*4+3] << shift0; |
9806 | |
9807 | drflac_uint32 side0 = pInputSamples1U32[i*4+0] << shift1; |
9808 | drflac_uint32 side1 = pInputSamples1U32[i*4+1] << shift1; |
9809 | drflac_uint32 side2 = pInputSamples1U32[i*4+2] << shift1; |
9810 | drflac_uint32 side3 = pInputSamples1U32[i*4+3] << shift1; |
9811 | |
9812 | drflac_uint32 right0 = left0 - side0; |
9813 | drflac_uint32 right1 = left1 - side1; |
9814 | drflac_uint32 right2 = left2 - side2; |
9815 | drflac_uint32 right3 = left3 - side3; |
9816 | |
9817 | left0 >>= 16; |
9818 | left1 >>= 16; |
9819 | left2 >>= 16; |
9820 | left3 >>= 16; |
9821 | |
9822 | right0 >>= 16; |
9823 | right1 >>= 16; |
9824 | right2 >>= 16; |
9825 | right3 >>= 16; |
9826 | |
9827 | pOutputSamples[i*8+0] = (drflac_int16)left0; |
9828 | pOutputSamples[i*8+1] = (drflac_int16)right0; |
9829 | pOutputSamples[i*8+2] = (drflac_int16)left1; |
9830 | pOutputSamples[i*8+3] = (drflac_int16)right1; |
9831 | pOutputSamples[i*8+4] = (drflac_int16)left2; |
9832 | pOutputSamples[i*8+5] = (drflac_int16)right2; |
9833 | pOutputSamples[i*8+6] = (drflac_int16)left3; |
9834 | pOutputSamples[i*8+7] = (drflac_int16)right3; |
9835 | } |
9836 | |
9837 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
9838 | drflac_uint32 left = pInputSamples0U32[i] << shift0; |
9839 | drflac_uint32 side = pInputSamples1U32[i] << shift1; |
9840 | drflac_uint32 right = left - side; |
9841 | |
9842 | left >>= 16; |
9843 | right >>= 16; |
9844 | |
9845 | pOutputSamples[i*2+0] = (drflac_int16)left; |
9846 | pOutputSamples[i*2+1] = (drflac_int16)right; |
9847 | } |
9848 | } |
9849 | |
9850 | #if defined(DRFLAC_SUPPORT_SSE2) |
9851 | 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) |
9852 | { |
9853 | drflac_uint64 i; |
9854 | drflac_uint64 frameCount4 = frameCount >> 2; |
9855 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
9856 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
9857 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
9858 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
9859 | |
9860 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
9861 | |
9862 | for (i = 0; i < frameCount4; ++i) { |
9863 | __m128i left = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), shift0); |
9864 | __m128i side = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), shift1); |
9865 | __m128i right = _mm_sub_epi32(left, side); |
9866 | |
9867 | left = _mm_srai_epi32(left, 16); |
9868 | right = _mm_srai_epi32(right, 16); |
9869 | |
9870 | _mm_storeu_si128((__m128i*)(pOutputSamples + i*8), drflac__mm_packs_interleaved_epi32(left, right)); |
9871 | } |
9872 | |
9873 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
9874 | drflac_uint32 left = pInputSamples0U32[i] << shift0; |
9875 | drflac_uint32 side = pInputSamples1U32[i] << shift1; |
9876 | drflac_uint32 right = left - side; |
9877 | |
9878 | left >>= 16; |
9879 | right >>= 16; |
9880 | |
9881 | pOutputSamples[i*2+0] = (drflac_int16)left; |
9882 | pOutputSamples[i*2+1] = (drflac_int16)right; |
9883 | } |
9884 | } |
9885 | #endif |
9886 | |
9887 | #if defined(DRFLAC_SUPPORT_NEON) |
9888 | 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) |
9889 | { |
9890 | drflac_uint64 i; |
9891 | drflac_uint64 frameCount4 = frameCount >> 2; |
9892 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
9893 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
9894 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
9895 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
9896 | int32x4_t shift0_4; |
9897 | int32x4_t shift1_4; |
9898 | |
9899 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
9900 | |
9901 | shift0_4 = vdupq_n_s32(shift0); |
9902 | shift1_4 = vdupq_n_s32(shift1); |
9903 | |
9904 | for (i = 0; i < frameCount4; ++i) { |
9905 | uint32x4_t left; |
9906 | uint32x4_t side; |
9907 | uint32x4_t right; |
9908 | |
9909 | left = vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), shift0_4); |
9910 | side = vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), shift1_4); |
9911 | right = vsubq_u32(left, side); |
9912 | |
9913 | left = vshrq_n_u32(left, 16); |
9914 | right = vshrq_n_u32(right, 16); |
9915 | |
9916 | drflac__vst2q_u16((drflac_uint16*)pOutputSamples + i*8, vzip_u16(vmovn_u32(left), vmovn_u32(right))); |
9917 | } |
9918 | |
9919 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
9920 | drflac_uint32 left = pInputSamples0U32[i] << shift0; |
9921 | drflac_uint32 side = pInputSamples1U32[i] << shift1; |
9922 | drflac_uint32 right = left - side; |
9923 | |
9924 | left >>= 16; |
9925 | right >>= 16; |
9926 | |
9927 | pOutputSamples[i*2+0] = (drflac_int16)left; |
9928 | pOutputSamples[i*2+1] = (drflac_int16)right; |
9929 | } |
9930 | } |
9931 | #endif |
9932 | |
9933 | 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) |
9934 | { |
9935 | #if defined(DRFLAC_SUPPORT_SSE2) |
9936 | if (drflac__gIsSSE2Supported && pFlac->bitsPerSample <= 24) { |
9937 | drflac_read_pcm_frames_s16__decode_left_side__sse2(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
9938 | } else |
9939 | #elif defined(DRFLAC_SUPPORT_NEON) |
9940 | if (drflac__gIsNEONSupported && pFlac->bitsPerSample <= 24) { |
9941 | drflac_read_pcm_frames_s16__decode_left_side__neon(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
9942 | } else |
9943 | #endif |
9944 | { |
9945 | /* Scalar fallback. */ |
9e052883 |
9946 | #if 0 |
9947 | drflac_read_pcm_frames_s16__decode_left_side__reference(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
9948 | #else |
2ff0b512 |
9949 | drflac_read_pcm_frames_s16__decode_left_side__scalar(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
9e052883 |
9950 | #endif |
2ff0b512 |
9951 | } |
9952 | } |
9953 | |
9954 | |
9e052883 |
9955 | #if 0 |
9956 | static DRFLAC_INLINE void drflac_read_pcm_frames_s16__decode_right_side__reference(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int16* pOutputSamples) |
9957 | { |
9958 | drflac_uint64 i; |
9959 | for (i = 0; i < frameCount; ++i) { |
9960 | drflac_uint32 side = (drflac_uint32)pInputSamples0[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); |
9961 | drflac_uint32 right = (drflac_uint32)pInputSamples1[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); |
9962 | drflac_uint32 left = right + side; |
9963 | |
9964 | left >>= 16; |
9965 | right >>= 16; |
9966 | |
9967 | pOutputSamples[i*2+0] = (drflac_int16)left; |
9968 | pOutputSamples[i*2+1] = (drflac_int16)right; |
9969 | } |
9970 | } |
9971 | #endif |
9972 | |
2ff0b512 |
9973 | 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) |
9974 | { |
9975 | drflac_uint64 i; |
9976 | drflac_uint64 frameCount4 = frameCount >> 2; |
9977 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
9978 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
9979 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
9980 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
9981 | |
9982 | for (i = 0; i < frameCount4; ++i) { |
9983 | drflac_uint32 side0 = pInputSamples0U32[i*4+0] << shift0; |
9984 | drflac_uint32 side1 = pInputSamples0U32[i*4+1] << shift0; |
9985 | drflac_uint32 side2 = pInputSamples0U32[i*4+2] << shift0; |
9986 | drflac_uint32 side3 = pInputSamples0U32[i*4+3] << shift0; |
9987 | |
9988 | drflac_uint32 right0 = pInputSamples1U32[i*4+0] << shift1; |
9989 | drflac_uint32 right1 = pInputSamples1U32[i*4+1] << shift1; |
9990 | drflac_uint32 right2 = pInputSamples1U32[i*4+2] << shift1; |
9991 | drflac_uint32 right3 = pInputSamples1U32[i*4+3] << shift1; |
9992 | |
9993 | drflac_uint32 left0 = right0 + side0; |
9994 | drflac_uint32 left1 = right1 + side1; |
9995 | drflac_uint32 left2 = right2 + side2; |
9996 | drflac_uint32 left3 = right3 + side3; |
9997 | |
9998 | left0 >>= 16; |
9999 | left1 >>= 16; |
10000 | left2 >>= 16; |
10001 | left3 >>= 16; |
10002 | |
10003 | right0 >>= 16; |
10004 | right1 >>= 16; |
10005 | right2 >>= 16; |
10006 | right3 >>= 16; |
10007 | |
10008 | pOutputSamples[i*8+0] = (drflac_int16)left0; |
10009 | pOutputSamples[i*8+1] = (drflac_int16)right0; |
10010 | pOutputSamples[i*8+2] = (drflac_int16)left1; |
10011 | pOutputSamples[i*8+3] = (drflac_int16)right1; |
10012 | pOutputSamples[i*8+4] = (drflac_int16)left2; |
10013 | pOutputSamples[i*8+5] = (drflac_int16)right2; |
10014 | pOutputSamples[i*8+6] = (drflac_int16)left3; |
10015 | pOutputSamples[i*8+7] = (drflac_int16)right3; |
10016 | } |
10017 | |
10018 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
10019 | drflac_uint32 side = pInputSamples0U32[i] << shift0; |
10020 | drflac_uint32 right = pInputSamples1U32[i] << shift1; |
10021 | drflac_uint32 left = right + side; |
10022 | |
10023 | left >>= 16; |
10024 | right >>= 16; |
10025 | |
10026 | pOutputSamples[i*2+0] = (drflac_int16)left; |
10027 | pOutputSamples[i*2+1] = (drflac_int16)right; |
10028 | } |
10029 | } |
10030 | |
10031 | #if defined(DRFLAC_SUPPORT_SSE2) |
10032 | 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) |
10033 | { |
10034 | drflac_uint64 i; |
10035 | drflac_uint64 frameCount4 = frameCount >> 2; |
10036 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
10037 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
10038 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
10039 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
10040 | |
10041 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
10042 | |
10043 | for (i = 0; i < frameCount4; ++i) { |
10044 | __m128i side = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), shift0); |
10045 | __m128i right = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), shift1); |
10046 | __m128i left = _mm_add_epi32(right, side); |
10047 | |
10048 | left = _mm_srai_epi32(left, 16); |
10049 | right = _mm_srai_epi32(right, 16); |
10050 | |
10051 | _mm_storeu_si128((__m128i*)(pOutputSamples + i*8), drflac__mm_packs_interleaved_epi32(left, right)); |
10052 | } |
10053 | |
10054 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
10055 | drflac_uint32 side = pInputSamples0U32[i] << shift0; |
10056 | drflac_uint32 right = pInputSamples1U32[i] << shift1; |
10057 | drflac_uint32 left = right + side; |
10058 | |
10059 | left >>= 16; |
10060 | right >>= 16; |
10061 | |
10062 | pOutputSamples[i*2+0] = (drflac_int16)left; |
10063 | pOutputSamples[i*2+1] = (drflac_int16)right; |
10064 | } |
10065 | } |
10066 | #endif |
10067 | |
10068 | #if defined(DRFLAC_SUPPORT_NEON) |
10069 | 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) |
10070 | { |
10071 | drflac_uint64 i; |
10072 | drflac_uint64 frameCount4 = frameCount >> 2; |
10073 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
10074 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
10075 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
10076 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
10077 | int32x4_t shift0_4; |
10078 | int32x4_t shift1_4; |
10079 | |
10080 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
10081 | |
10082 | shift0_4 = vdupq_n_s32(shift0); |
10083 | shift1_4 = vdupq_n_s32(shift1); |
10084 | |
10085 | for (i = 0; i < frameCount4; ++i) { |
10086 | uint32x4_t side; |
10087 | uint32x4_t right; |
10088 | uint32x4_t left; |
10089 | |
10090 | side = vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), shift0_4); |
10091 | right = vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), shift1_4); |
10092 | left = vaddq_u32(right, side); |
10093 | |
10094 | left = vshrq_n_u32(left, 16); |
10095 | right = vshrq_n_u32(right, 16); |
10096 | |
10097 | drflac__vst2q_u16((drflac_uint16*)pOutputSamples + i*8, vzip_u16(vmovn_u32(left), vmovn_u32(right))); |
10098 | } |
10099 | |
10100 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
10101 | drflac_uint32 side = pInputSamples0U32[i] << shift0; |
10102 | drflac_uint32 right = pInputSamples1U32[i] << shift1; |
10103 | drflac_uint32 left = right + side; |
10104 | |
10105 | left >>= 16; |
10106 | right >>= 16; |
10107 | |
10108 | pOutputSamples[i*2+0] = (drflac_int16)left; |
10109 | pOutputSamples[i*2+1] = (drflac_int16)right; |
10110 | } |
10111 | } |
10112 | #endif |
10113 | |
10114 | 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) |
10115 | { |
10116 | #if defined(DRFLAC_SUPPORT_SSE2) |
10117 | if (drflac__gIsSSE2Supported && pFlac->bitsPerSample <= 24) { |
10118 | drflac_read_pcm_frames_s16__decode_right_side__sse2(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
10119 | } else |
10120 | #elif defined(DRFLAC_SUPPORT_NEON) |
10121 | if (drflac__gIsNEONSupported && pFlac->bitsPerSample <= 24) { |
10122 | drflac_read_pcm_frames_s16__decode_right_side__neon(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
10123 | } else |
10124 | #endif |
10125 | { |
10126 | /* Scalar fallback. */ |
9e052883 |
10127 | #if 0 |
10128 | drflac_read_pcm_frames_s16__decode_right_side__reference(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
10129 | #else |
2ff0b512 |
10130 | drflac_read_pcm_frames_s16__decode_right_side__scalar(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
9e052883 |
10131 | #endif |
2ff0b512 |
10132 | } |
10133 | } |
10134 | |
10135 | |
9e052883 |
10136 | #if 0 |
10137 | static DRFLAC_INLINE void drflac_read_pcm_frames_s16__decode_mid_side__reference(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int16* pOutputSamples) |
10138 | { |
10139 | for (drflac_uint64 i = 0; i < frameCount; ++i) { |
10140 | drflac_uint32 mid = (drflac_uint32)pInputSamples0[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
10141 | drflac_uint32 side = (drflac_uint32)pInputSamples1[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
10142 | |
10143 | mid = (mid << 1) | (side & 0x01); |
10144 | |
10145 | pOutputSamples[i*2+0] = (drflac_int16)(((drflac_uint32)((drflac_int32)(mid + side) >> 1) << unusedBitsPerSample) >> 16); |
10146 | pOutputSamples[i*2+1] = (drflac_int16)(((drflac_uint32)((drflac_int32)(mid - side) >> 1) << unusedBitsPerSample) >> 16); |
10147 | } |
10148 | } |
10149 | #endif |
2ff0b512 |
10150 | |
10151 | 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) |
10152 | { |
10153 | drflac_uint64 i; |
10154 | drflac_uint64 frameCount4 = frameCount >> 2; |
10155 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
10156 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
10157 | drflac_uint32 shift = unusedBitsPerSample; |
10158 | |
10159 | if (shift > 0) { |
10160 | shift -= 1; |
10161 | for (i = 0; i < frameCount4; ++i) { |
10162 | drflac_uint32 temp0L; |
10163 | drflac_uint32 temp1L; |
10164 | drflac_uint32 temp2L; |
10165 | drflac_uint32 temp3L; |
10166 | drflac_uint32 temp0R; |
10167 | drflac_uint32 temp1R; |
10168 | drflac_uint32 temp2R; |
10169 | drflac_uint32 temp3R; |
10170 | |
10171 | drflac_uint32 mid0 = pInputSamples0U32[i*4+0] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
10172 | drflac_uint32 mid1 = pInputSamples0U32[i*4+1] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
10173 | drflac_uint32 mid2 = pInputSamples0U32[i*4+2] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
10174 | drflac_uint32 mid3 = pInputSamples0U32[i*4+3] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
10175 | |
10176 | drflac_uint32 side0 = pInputSamples1U32[i*4+0] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
10177 | drflac_uint32 side1 = pInputSamples1U32[i*4+1] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
10178 | drflac_uint32 side2 = pInputSamples1U32[i*4+2] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
10179 | drflac_uint32 side3 = pInputSamples1U32[i*4+3] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
10180 | |
10181 | mid0 = (mid0 << 1) | (side0 & 0x01); |
10182 | mid1 = (mid1 << 1) | (side1 & 0x01); |
10183 | mid2 = (mid2 << 1) | (side2 & 0x01); |
10184 | mid3 = (mid3 << 1) | (side3 & 0x01); |
10185 | |
10186 | temp0L = (mid0 + side0) << shift; |
10187 | temp1L = (mid1 + side1) << shift; |
10188 | temp2L = (mid2 + side2) << shift; |
10189 | temp3L = (mid3 + side3) << shift; |
10190 | |
10191 | temp0R = (mid0 - side0) << shift; |
10192 | temp1R = (mid1 - side1) << shift; |
10193 | temp2R = (mid2 - side2) << shift; |
10194 | temp3R = (mid3 - side3) << shift; |
10195 | |
10196 | temp0L >>= 16; |
10197 | temp1L >>= 16; |
10198 | temp2L >>= 16; |
10199 | temp3L >>= 16; |
10200 | |
10201 | temp0R >>= 16; |
10202 | temp1R >>= 16; |
10203 | temp2R >>= 16; |
10204 | temp3R >>= 16; |
10205 | |
10206 | pOutputSamples[i*8+0] = (drflac_int16)temp0L; |
10207 | pOutputSamples[i*8+1] = (drflac_int16)temp0R; |
10208 | pOutputSamples[i*8+2] = (drflac_int16)temp1L; |
10209 | pOutputSamples[i*8+3] = (drflac_int16)temp1R; |
10210 | pOutputSamples[i*8+4] = (drflac_int16)temp2L; |
10211 | pOutputSamples[i*8+5] = (drflac_int16)temp2R; |
10212 | pOutputSamples[i*8+6] = (drflac_int16)temp3L; |
10213 | pOutputSamples[i*8+7] = (drflac_int16)temp3R; |
10214 | } |
10215 | } else { |
10216 | for (i = 0; i < frameCount4; ++i) { |
10217 | drflac_uint32 temp0L; |
10218 | drflac_uint32 temp1L; |
10219 | drflac_uint32 temp2L; |
10220 | drflac_uint32 temp3L; |
10221 | drflac_uint32 temp0R; |
10222 | drflac_uint32 temp1R; |
10223 | drflac_uint32 temp2R; |
10224 | drflac_uint32 temp3R; |
10225 | |
10226 | drflac_uint32 mid0 = pInputSamples0U32[i*4+0] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
10227 | drflac_uint32 mid1 = pInputSamples0U32[i*4+1] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
10228 | drflac_uint32 mid2 = pInputSamples0U32[i*4+2] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
10229 | drflac_uint32 mid3 = pInputSamples0U32[i*4+3] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
10230 | |
10231 | drflac_uint32 side0 = pInputSamples1U32[i*4+0] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
10232 | drflac_uint32 side1 = pInputSamples1U32[i*4+1] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
10233 | drflac_uint32 side2 = pInputSamples1U32[i*4+2] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
10234 | drflac_uint32 side3 = pInputSamples1U32[i*4+3] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
10235 | |
10236 | mid0 = (mid0 << 1) | (side0 & 0x01); |
10237 | mid1 = (mid1 << 1) | (side1 & 0x01); |
10238 | mid2 = (mid2 << 1) | (side2 & 0x01); |
10239 | mid3 = (mid3 << 1) | (side3 & 0x01); |
10240 | |
10241 | temp0L = ((drflac_int32)(mid0 + side0) >> 1); |
10242 | temp1L = ((drflac_int32)(mid1 + side1) >> 1); |
10243 | temp2L = ((drflac_int32)(mid2 + side2) >> 1); |
10244 | temp3L = ((drflac_int32)(mid3 + side3) >> 1); |
10245 | |
10246 | temp0R = ((drflac_int32)(mid0 - side0) >> 1); |
10247 | temp1R = ((drflac_int32)(mid1 - side1) >> 1); |
10248 | temp2R = ((drflac_int32)(mid2 - side2) >> 1); |
10249 | temp3R = ((drflac_int32)(mid3 - side3) >> 1); |
10250 | |
10251 | temp0L >>= 16; |
10252 | temp1L >>= 16; |
10253 | temp2L >>= 16; |
10254 | temp3L >>= 16; |
10255 | |
10256 | temp0R >>= 16; |
10257 | temp1R >>= 16; |
10258 | temp2R >>= 16; |
10259 | temp3R >>= 16; |
10260 | |
10261 | pOutputSamples[i*8+0] = (drflac_int16)temp0L; |
10262 | pOutputSamples[i*8+1] = (drflac_int16)temp0R; |
10263 | pOutputSamples[i*8+2] = (drflac_int16)temp1L; |
10264 | pOutputSamples[i*8+3] = (drflac_int16)temp1R; |
10265 | pOutputSamples[i*8+4] = (drflac_int16)temp2L; |
10266 | pOutputSamples[i*8+5] = (drflac_int16)temp2R; |
10267 | pOutputSamples[i*8+6] = (drflac_int16)temp3L; |
10268 | pOutputSamples[i*8+7] = (drflac_int16)temp3R; |
10269 | } |
10270 | } |
10271 | |
10272 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
10273 | drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
10274 | drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
10275 | |
10276 | mid = (mid << 1) | (side & 0x01); |
10277 | |
10278 | pOutputSamples[i*2+0] = (drflac_int16)(((drflac_uint32)((drflac_int32)(mid + side) >> 1) << unusedBitsPerSample) >> 16); |
10279 | pOutputSamples[i*2+1] = (drflac_int16)(((drflac_uint32)((drflac_int32)(mid - side) >> 1) << unusedBitsPerSample) >> 16); |
10280 | } |
10281 | } |
10282 | |
10283 | #if defined(DRFLAC_SUPPORT_SSE2) |
10284 | 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) |
10285 | { |
10286 | drflac_uint64 i; |
10287 | drflac_uint64 frameCount4 = frameCount >> 2; |
10288 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
10289 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
10290 | drflac_uint32 shift = unusedBitsPerSample; |
10291 | |
10292 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
10293 | |
10294 | if (shift == 0) { |
10295 | for (i = 0; i < frameCount4; ++i) { |
10296 | __m128i mid; |
10297 | __m128i side; |
10298 | __m128i left; |
10299 | __m128i right; |
10300 | |
10301 | mid = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); |
10302 | side = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); |
10303 | |
10304 | mid = _mm_or_si128(_mm_slli_epi32(mid, 1), _mm_and_si128(side, _mm_set1_epi32(0x01))); |
10305 | |
10306 | left = _mm_srai_epi32(_mm_add_epi32(mid, side), 1); |
10307 | right = _mm_srai_epi32(_mm_sub_epi32(mid, side), 1); |
10308 | |
10309 | left = _mm_srai_epi32(left, 16); |
10310 | right = _mm_srai_epi32(right, 16); |
10311 | |
10312 | _mm_storeu_si128((__m128i*)(pOutputSamples + i*8), drflac__mm_packs_interleaved_epi32(left, right)); |
10313 | } |
10314 | |
10315 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
10316 | drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
10317 | drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
10318 | |
10319 | mid = (mid << 1) | (side & 0x01); |
10320 | |
10321 | pOutputSamples[i*2+0] = (drflac_int16)(((drflac_int32)(mid + side) >> 1) >> 16); |
10322 | pOutputSamples[i*2+1] = (drflac_int16)(((drflac_int32)(mid - side) >> 1) >> 16); |
10323 | } |
10324 | } else { |
10325 | shift -= 1; |
10326 | for (i = 0; i < frameCount4; ++i) { |
10327 | __m128i mid; |
10328 | __m128i side; |
10329 | __m128i left; |
10330 | __m128i right; |
10331 | |
10332 | mid = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); |
10333 | side = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); |
10334 | |
10335 | mid = _mm_or_si128(_mm_slli_epi32(mid, 1), _mm_and_si128(side, _mm_set1_epi32(0x01))); |
10336 | |
10337 | left = _mm_slli_epi32(_mm_add_epi32(mid, side), shift); |
10338 | right = _mm_slli_epi32(_mm_sub_epi32(mid, side), shift); |
10339 | |
10340 | left = _mm_srai_epi32(left, 16); |
10341 | right = _mm_srai_epi32(right, 16); |
10342 | |
10343 | _mm_storeu_si128((__m128i*)(pOutputSamples + i*8), drflac__mm_packs_interleaved_epi32(left, right)); |
10344 | } |
10345 | |
10346 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
10347 | drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
10348 | drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
10349 | |
10350 | mid = (mid << 1) | (side & 0x01); |
10351 | |
10352 | pOutputSamples[i*2+0] = (drflac_int16)(((mid + side) << shift) >> 16); |
10353 | pOutputSamples[i*2+1] = (drflac_int16)(((mid - side) << shift) >> 16); |
10354 | } |
10355 | } |
10356 | } |
10357 | #endif |
10358 | |
10359 | #if defined(DRFLAC_SUPPORT_NEON) |
10360 | 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) |
10361 | { |
10362 | drflac_uint64 i; |
10363 | drflac_uint64 frameCount4 = frameCount >> 2; |
10364 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
10365 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
10366 | drflac_uint32 shift = unusedBitsPerSample; |
10367 | int32x4_t wbpsShift0_4; /* wbps = Wasted Bits Per Sample */ |
10368 | int32x4_t wbpsShift1_4; /* wbps = Wasted Bits Per Sample */ |
10369 | |
10370 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
10371 | |
10372 | wbpsShift0_4 = vdupq_n_s32(pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); |
10373 | wbpsShift1_4 = vdupq_n_s32(pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); |
10374 | |
10375 | if (shift == 0) { |
10376 | for (i = 0; i < frameCount4; ++i) { |
10377 | uint32x4_t mid; |
10378 | uint32x4_t side; |
10379 | int32x4_t left; |
10380 | int32x4_t right; |
10381 | |
10382 | mid = vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), wbpsShift0_4); |
10383 | side = vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), wbpsShift1_4); |
10384 | |
10385 | mid = vorrq_u32(vshlq_n_u32(mid, 1), vandq_u32(side, vdupq_n_u32(1))); |
10386 | |
10387 | left = vshrq_n_s32(vreinterpretq_s32_u32(vaddq_u32(mid, side)), 1); |
10388 | right = vshrq_n_s32(vreinterpretq_s32_u32(vsubq_u32(mid, side)), 1); |
10389 | |
10390 | left = vshrq_n_s32(left, 16); |
10391 | right = vshrq_n_s32(right, 16); |
10392 | |
10393 | drflac__vst2q_s16(pOutputSamples + i*8, vzip_s16(vmovn_s32(left), vmovn_s32(right))); |
10394 | } |
10395 | |
10396 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
10397 | drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
10398 | drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
10399 | |
10400 | mid = (mid << 1) | (side & 0x01); |
10401 | |
10402 | pOutputSamples[i*2+0] = (drflac_int16)(((drflac_int32)(mid + side) >> 1) >> 16); |
10403 | pOutputSamples[i*2+1] = (drflac_int16)(((drflac_int32)(mid - side) >> 1) >> 16); |
10404 | } |
10405 | } else { |
10406 | int32x4_t shift4; |
10407 | |
10408 | shift -= 1; |
10409 | shift4 = vdupq_n_s32(shift); |
10410 | |
10411 | for (i = 0; i < frameCount4; ++i) { |
10412 | uint32x4_t mid; |
10413 | uint32x4_t side; |
10414 | int32x4_t left; |
10415 | int32x4_t right; |
10416 | |
10417 | mid = vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), wbpsShift0_4); |
10418 | side = vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), wbpsShift1_4); |
10419 | |
10420 | mid = vorrq_u32(vshlq_n_u32(mid, 1), vandq_u32(side, vdupq_n_u32(1))); |
10421 | |
10422 | left = vreinterpretq_s32_u32(vshlq_u32(vaddq_u32(mid, side), shift4)); |
10423 | right = vreinterpretq_s32_u32(vshlq_u32(vsubq_u32(mid, side), shift4)); |
10424 | |
10425 | left = vshrq_n_s32(left, 16); |
10426 | right = vshrq_n_s32(right, 16); |
10427 | |
10428 | drflac__vst2q_s16(pOutputSamples + i*8, vzip_s16(vmovn_s32(left), vmovn_s32(right))); |
10429 | } |
10430 | |
10431 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
10432 | drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
10433 | drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
10434 | |
10435 | mid = (mid << 1) | (side & 0x01); |
10436 | |
10437 | pOutputSamples[i*2+0] = (drflac_int16)(((mid + side) << shift) >> 16); |
10438 | pOutputSamples[i*2+1] = (drflac_int16)(((mid - side) << shift) >> 16); |
10439 | } |
10440 | } |
10441 | } |
10442 | #endif |
10443 | |
10444 | 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) |
10445 | { |
10446 | #if defined(DRFLAC_SUPPORT_SSE2) |
10447 | if (drflac__gIsSSE2Supported && pFlac->bitsPerSample <= 24) { |
10448 | drflac_read_pcm_frames_s16__decode_mid_side__sse2(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
10449 | } else |
10450 | #elif defined(DRFLAC_SUPPORT_NEON) |
10451 | if (drflac__gIsNEONSupported && pFlac->bitsPerSample <= 24) { |
10452 | drflac_read_pcm_frames_s16__decode_mid_side__neon(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
10453 | } else |
10454 | #endif |
10455 | { |
10456 | /* Scalar fallback. */ |
9e052883 |
10457 | #if 0 |
10458 | drflac_read_pcm_frames_s16__decode_mid_side__reference(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
10459 | #else |
2ff0b512 |
10460 | drflac_read_pcm_frames_s16__decode_mid_side__scalar(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
9e052883 |
10461 | #endif |
10462 | } |
10463 | } |
10464 | |
10465 | |
10466 | #if 0 |
10467 | static DRFLAC_INLINE void drflac_read_pcm_frames_s16__decode_independent_stereo__reference(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, drflac_int16* pOutputSamples) |
10468 | { |
10469 | for (drflac_uint64 i = 0; i < frameCount; ++i) { |
10470 | pOutputSamples[i*2+0] = (drflac_int16)((drflac_int32)((drflac_uint32)pInputSamples0[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample)) >> 16); |
10471 | pOutputSamples[i*2+1] = (drflac_int16)((drflac_int32)((drflac_uint32)pInputSamples1[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample)) >> 16); |
2ff0b512 |
10472 | } |
10473 | } |
9e052883 |
10474 | #endif |
2ff0b512 |
10475 | |
10476 | 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) |
10477 | { |
10478 | drflac_uint64 i; |
10479 | drflac_uint64 frameCount4 = frameCount >> 2; |
10480 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
10481 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
10482 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
10483 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
10484 | |
10485 | for (i = 0; i < frameCount4; ++i) { |
10486 | drflac_uint32 tempL0 = pInputSamples0U32[i*4+0] << shift0; |
10487 | drflac_uint32 tempL1 = pInputSamples0U32[i*4+1] << shift0; |
10488 | drflac_uint32 tempL2 = pInputSamples0U32[i*4+2] << shift0; |
10489 | drflac_uint32 tempL3 = pInputSamples0U32[i*4+3] << shift0; |
10490 | |
10491 | drflac_uint32 tempR0 = pInputSamples1U32[i*4+0] << shift1; |
10492 | drflac_uint32 tempR1 = pInputSamples1U32[i*4+1] << shift1; |
10493 | drflac_uint32 tempR2 = pInputSamples1U32[i*4+2] << shift1; |
10494 | drflac_uint32 tempR3 = pInputSamples1U32[i*4+3] << shift1; |
10495 | |
10496 | tempL0 >>= 16; |
10497 | tempL1 >>= 16; |
10498 | tempL2 >>= 16; |
10499 | tempL3 >>= 16; |
10500 | |
10501 | tempR0 >>= 16; |
10502 | tempR1 >>= 16; |
10503 | tempR2 >>= 16; |
10504 | tempR3 >>= 16; |
10505 | |
10506 | pOutputSamples[i*8+0] = (drflac_int16)tempL0; |
10507 | pOutputSamples[i*8+1] = (drflac_int16)tempR0; |
10508 | pOutputSamples[i*8+2] = (drflac_int16)tempL1; |
10509 | pOutputSamples[i*8+3] = (drflac_int16)tempR1; |
10510 | pOutputSamples[i*8+4] = (drflac_int16)tempL2; |
10511 | pOutputSamples[i*8+5] = (drflac_int16)tempR2; |
10512 | pOutputSamples[i*8+6] = (drflac_int16)tempL3; |
10513 | pOutputSamples[i*8+7] = (drflac_int16)tempR3; |
10514 | } |
10515 | |
10516 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
10517 | pOutputSamples[i*2+0] = (drflac_int16)((pInputSamples0U32[i] << shift0) >> 16); |
10518 | pOutputSamples[i*2+1] = (drflac_int16)((pInputSamples1U32[i] << shift1) >> 16); |
10519 | } |
10520 | } |
10521 | |
10522 | #if defined(DRFLAC_SUPPORT_SSE2) |
10523 | 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) |
10524 | { |
10525 | drflac_uint64 i; |
10526 | drflac_uint64 frameCount4 = frameCount >> 2; |
10527 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
10528 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
10529 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
10530 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
10531 | |
10532 | for (i = 0; i < frameCount4; ++i) { |
10533 | __m128i left = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), shift0); |
10534 | __m128i right = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), shift1); |
10535 | |
10536 | left = _mm_srai_epi32(left, 16); |
10537 | right = _mm_srai_epi32(right, 16); |
10538 | |
10539 | /* 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. */ |
10540 | _mm_storeu_si128((__m128i*)(pOutputSamples + i*8), drflac__mm_packs_interleaved_epi32(left, right)); |
10541 | } |
10542 | |
10543 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
10544 | pOutputSamples[i*2+0] = (drflac_int16)((pInputSamples0U32[i] << shift0) >> 16); |
10545 | pOutputSamples[i*2+1] = (drflac_int16)((pInputSamples1U32[i] << shift1) >> 16); |
10546 | } |
10547 | } |
10548 | #endif |
10549 | |
10550 | #if defined(DRFLAC_SUPPORT_NEON) |
10551 | 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) |
10552 | { |
10553 | drflac_uint64 i; |
10554 | drflac_uint64 frameCount4 = frameCount >> 2; |
10555 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
10556 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
10557 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
10558 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
10559 | |
10560 | int32x4_t shift0_4 = vdupq_n_s32(shift0); |
10561 | int32x4_t shift1_4 = vdupq_n_s32(shift1); |
10562 | |
10563 | for (i = 0; i < frameCount4; ++i) { |
10564 | int32x4_t left; |
10565 | int32x4_t right; |
10566 | |
10567 | left = vreinterpretq_s32_u32(vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), shift0_4)); |
10568 | right = vreinterpretq_s32_u32(vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), shift1_4)); |
10569 | |
10570 | left = vshrq_n_s32(left, 16); |
10571 | right = vshrq_n_s32(right, 16); |
10572 | |
10573 | drflac__vst2q_s16(pOutputSamples + i*8, vzip_s16(vmovn_s32(left), vmovn_s32(right))); |
10574 | } |
10575 | |
10576 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
10577 | pOutputSamples[i*2+0] = (drflac_int16)((pInputSamples0U32[i] << shift0) >> 16); |
10578 | pOutputSamples[i*2+1] = (drflac_int16)((pInputSamples1U32[i] << shift1) >> 16); |
10579 | } |
10580 | } |
10581 | #endif |
10582 | |
10583 | 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) |
10584 | { |
10585 | #if defined(DRFLAC_SUPPORT_SSE2) |
10586 | if (drflac__gIsSSE2Supported && pFlac->bitsPerSample <= 24) { |
10587 | drflac_read_pcm_frames_s16__decode_independent_stereo__sse2(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
10588 | } else |
10589 | #elif defined(DRFLAC_SUPPORT_NEON) |
10590 | if (drflac__gIsNEONSupported && pFlac->bitsPerSample <= 24) { |
10591 | drflac_read_pcm_frames_s16__decode_independent_stereo__neon(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
10592 | } else |
10593 | #endif |
10594 | { |
10595 | /* Scalar fallback. */ |
9e052883 |
10596 | #if 0 |
10597 | drflac_read_pcm_frames_s16__decode_independent_stereo__reference(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
10598 | #else |
2ff0b512 |
10599 | drflac_read_pcm_frames_s16__decode_independent_stereo__scalar(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
9e052883 |
10600 | #endif |
2ff0b512 |
10601 | } |
10602 | } |
10603 | |
10604 | DRFLAC_API drflac_uint64 drflac_read_pcm_frames_s16(drflac* pFlac, drflac_uint64 framesToRead, drflac_int16* pBufferOut) |
10605 | { |
10606 | drflac_uint64 framesRead; |
10607 | drflac_uint32 unusedBitsPerSample; |
10608 | |
10609 | if (pFlac == NULL || framesToRead == 0) { |
10610 | return 0; |
10611 | } |
10612 | |
10613 | if (pBufferOut == NULL) { |
10614 | return drflac__seek_forward_by_pcm_frames(pFlac, framesToRead); |
10615 | } |
10616 | |
10617 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 32); |
10618 | unusedBitsPerSample = 32 - pFlac->bitsPerSample; |
10619 | |
10620 | framesRead = 0; |
10621 | while (framesToRead > 0) { |
10622 | /* If we've run out of samples in this frame, go to the next. */ |
10623 | if (pFlac->currentFLACFrame.pcmFramesRemaining == 0) { |
10624 | if (!drflac__read_and_decode_next_flac_frame(pFlac)) { |
10625 | break; /* Couldn't read the next frame, so just break from the loop and return. */ |
10626 | } |
10627 | } else { |
10628 | unsigned int channelCount = drflac__get_channel_count_from_channel_assignment(pFlac->currentFLACFrame.header.channelAssignment); |
10629 | drflac_uint64 iFirstPCMFrame = pFlac->currentFLACFrame.header.blockSizeInPCMFrames - pFlac->currentFLACFrame.pcmFramesRemaining; |
10630 | drflac_uint64 frameCountThisIteration = framesToRead; |
10631 | |
10632 | if (frameCountThisIteration > pFlac->currentFLACFrame.pcmFramesRemaining) { |
10633 | frameCountThisIteration = pFlac->currentFLACFrame.pcmFramesRemaining; |
10634 | } |
10635 | |
10636 | if (channelCount == 2) { |
10637 | const drflac_int32* pDecodedSamples0 = pFlac->currentFLACFrame.subframes[0].pSamplesS32 + iFirstPCMFrame; |
10638 | const drflac_int32* pDecodedSamples1 = pFlac->currentFLACFrame.subframes[1].pSamplesS32 + iFirstPCMFrame; |
10639 | |
10640 | switch (pFlac->currentFLACFrame.header.channelAssignment) |
10641 | { |
10642 | case DRFLAC_CHANNEL_ASSIGNMENT_LEFT_SIDE: |
10643 | { |
10644 | drflac_read_pcm_frames_s16__decode_left_side(pFlac, frameCountThisIteration, unusedBitsPerSample, pDecodedSamples0, pDecodedSamples1, pBufferOut); |
10645 | } break; |
10646 | |
10647 | case DRFLAC_CHANNEL_ASSIGNMENT_RIGHT_SIDE: |
10648 | { |
10649 | drflac_read_pcm_frames_s16__decode_right_side(pFlac, frameCountThisIteration, unusedBitsPerSample, pDecodedSamples0, pDecodedSamples1, pBufferOut); |
10650 | } break; |
10651 | |
10652 | case DRFLAC_CHANNEL_ASSIGNMENT_MID_SIDE: |
10653 | { |
10654 | drflac_read_pcm_frames_s16__decode_mid_side(pFlac, frameCountThisIteration, unusedBitsPerSample, pDecodedSamples0, pDecodedSamples1, pBufferOut); |
10655 | } break; |
10656 | |
10657 | case DRFLAC_CHANNEL_ASSIGNMENT_INDEPENDENT: |
10658 | default: |
10659 | { |
10660 | drflac_read_pcm_frames_s16__decode_independent_stereo(pFlac, frameCountThisIteration, unusedBitsPerSample, pDecodedSamples0, pDecodedSamples1, pBufferOut); |
10661 | } break; |
10662 | } |
10663 | } else { |
10664 | /* Generic interleaving. */ |
10665 | drflac_uint64 i; |
10666 | for (i = 0; i < frameCountThisIteration; ++i) { |
10667 | unsigned int j; |
10668 | for (j = 0; j < channelCount; ++j) { |
10669 | drflac_int32 sampleS32 = (drflac_int32)((drflac_uint32)(pFlac->currentFLACFrame.subframes[j].pSamplesS32[iFirstPCMFrame + i]) << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[j].wastedBitsPerSample)); |
10670 | pBufferOut[(i*channelCount)+j] = (drflac_int16)(sampleS32 >> 16); |
10671 | } |
10672 | } |
10673 | } |
10674 | |
10675 | framesRead += frameCountThisIteration; |
10676 | pBufferOut += frameCountThisIteration * channelCount; |
10677 | framesToRead -= frameCountThisIteration; |
10678 | pFlac->currentPCMFrame += frameCountThisIteration; |
10679 | pFlac->currentFLACFrame.pcmFramesRemaining -= (drflac_uint32)frameCountThisIteration; |
10680 | } |
10681 | } |
10682 | |
10683 | return framesRead; |
10684 | } |
10685 | |
9e052883 |
10686 | |
10687 | #if 0 |
10688 | static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_left_side__reference(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) |
10689 | { |
10690 | drflac_uint64 i; |
10691 | for (i = 0; i < frameCount; ++i) { |
10692 | drflac_uint32 left = (drflac_uint32)pInputSamples0[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); |
10693 | drflac_uint32 side = (drflac_uint32)pInputSamples1[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); |
10694 | drflac_uint32 right = left - side; |
10695 | |
10696 | pOutputSamples[i*2+0] = (float)((drflac_int32)left / 2147483648.0); |
10697 | pOutputSamples[i*2+1] = (float)((drflac_int32)right / 2147483648.0); |
10698 | } |
10699 | } |
10700 | #endif |
10701 | |
2ff0b512 |
10702 | 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) |
10703 | { |
10704 | drflac_uint64 i; |
10705 | drflac_uint64 frameCount4 = frameCount >> 2; |
10706 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
10707 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
10708 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
10709 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
10710 | |
10711 | float factor = 1 / 2147483648.0; |
10712 | |
10713 | for (i = 0; i < frameCount4; ++i) { |
10714 | drflac_uint32 left0 = pInputSamples0U32[i*4+0] << shift0; |
10715 | drflac_uint32 left1 = pInputSamples0U32[i*4+1] << shift0; |
10716 | drflac_uint32 left2 = pInputSamples0U32[i*4+2] << shift0; |
10717 | drflac_uint32 left3 = pInputSamples0U32[i*4+3] << shift0; |
10718 | |
10719 | drflac_uint32 side0 = pInputSamples1U32[i*4+0] << shift1; |
10720 | drflac_uint32 side1 = pInputSamples1U32[i*4+1] << shift1; |
10721 | drflac_uint32 side2 = pInputSamples1U32[i*4+2] << shift1; |
10722 | drflac_uint32 side3 = pInputSamples1U32[i*4+3] << shift1; |
10723 | |
10724 | drflac_uint32 right0 = left0 - side0; |
10725 | drflac_uint32 right1 = left1 - side1; |
10726 | drflac_uint32 right2 = left2 - side2; |
10727 | drflac_uint32 right3 = left3 - side3; |
10728 | |
10729 | pOutputSamples[i*8+0] = (drflac_int32)left0 * factor; |
10730 | pOutputSamples[i*8+1] = (drflac_int32)right0 * factor; |
10731 | pOutputSamples[i*8+2] = (drflac_int32)left1 * factor; |
10732 | pOutputSamples[i*8+3] = (drflac_int32)right1 * factor; |
10733 | pOutputSamples[i*8+4] = (drflac_int32)left2 * factor; |
10734 | pOutputSamples[i*8+5] = (drflac_int32)right2 * factor; |
10735 | pOutputSamples[i*8+6] = (drflac_int32)left3 * factor; |
10736 | pOutputSamples[i*8+7] = (drflac_int32)right3 * factor; |
10737 | } |
10738 | |
10739 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
10740 | drflac_uint32 left = pInputSamples0U32[i] << shift0; |
10741 | drflac_uint32 side = pInputSamples1U32[i] << shift1; |
10742 | drflac_uint32 right = left - side; |
10743 | |
10744 | pOutputSamples[i*2+0] = (drflac_int32)left * factor; |
10745 | pOutputSamples[i*2+1] = (drflac_int32)right * factor; |
10746 | } |
10747 | } |
10748 | |
10749 | #if defined(DRFLAC_SUPPORT_SSE2) |
10750 | 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) |
10751 | { |
10752 | drflac_uint64 i; |
10753 | drflac_uint64 frameCount4 = frameCount >> 2; |
10754 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
10755 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
10756 | drflac_uint32 shift0 = (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample) - 8; |
10757 | drflac_uint32 shift1 = (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample) - 8; |
10758 | __m128 factor; |
10759 | |
10760 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
10761 | |
10762 | factor = _mm_set1_ps(1.0f / 8388608.0f); |
10763 | |
10764 | for (i = 0; i < frameCount4; ++i) { |
10765 | __m128i left = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), shift0); |
10766 | __m128i side = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), shift1); |
10767 | __m128i right = _mm_sub_epi32(left, side); |
10768 | __m128 leftf = _mm_mul_ps(_mm_cvtepi32_ps(left), factor); |
10769 | __m128 rightf = _mm_mul_ps(_mm_cvtepi32_ps(right), factor); |
10770 | |
10771 | _mm_storeu_ps(pOutputSamples + i*8 + 0, _mm_unpacklo_ps(leftf, rightf)); |
10772 | _mm_storeu_ps(pOutputSamples + i*8 + 4, _mm_unpackhi_ps(leftf, rightf)); |
10773 | } |
10774 | |
10775 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
10776 | drflac_uint32 left = pInputSamples0U32[i] << shift0; |
10777 | drflac_uint32 side = pInputSamples1U32[i] << shift1; |
10778 | drflac_uint32 right = left - side; |
10779 | |
10780 | pOutputSamples[i*2+0] = (drflac_int32)left / 8388608.0f; |
10781 | pOutputSamples[i*2+1] = (drflac_int32)right / 8388608.0f; |
10782 | } |
10783 | } |
10784 | #endif |
10785 | |
10786 | #if defined(DRFLAC_SUPPORT_NEON) |
10787 | 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) |
10788 | { |
10789 | drflac_uint64 i; |
10790 | drflac_uint64 frameCount4 = frameCount >> 2; |
10791 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
10792 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
10793 | drflac_uint32 shift0 = (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample) - 8; |
10794 | drflac_uint32 shift1 = (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample) - 8; |
10795 | float32x4_t factor4; |
10796 | int32x4_t shift0_4; |
10797 | int32x4_t shift1_4; |
10798 | |
10799 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
10800 | |
10801 | factor4 = vdupq_n_f32(1.0f / 8388608.0f); |
10802 | shift0_4 = vdupq_n_s32(shift0); |
10803 | shift1_4 = vdupq_n_s32(shift1); |
10804 | |
10805 | for (i = 0; i < frameCount4; ++i) { |
10806 | uint32x4_t left; |
10807 | uint32x4_t side; |
10808 | uint32x4_t right; |
10809 | float32x4_t leftf; |
10810 | float32x4_t rightf; |
10811 | |
10812 | left = vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), shift0_4); |
10813 | side = vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), shift1_4); |
10814 | right = vsubq_u32(left, side); |
10815 | leftf = vmulq_f32(vcvtq_f32_s32(vreinterpretq_s32_u32(left)), factor4); |
10816 | rightf = vmulq_f32(vcvtq_f32_s32(vreinterpretq_s32_u32(right)), factor4); |
10817 | |
10818 | drflac__vst2q_f32(pOutputSamples + i*8, vzipq_f32(leftf, rightf)); |
10819 | } |
10820 | |
10821 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
10822 | drflac_uint32 left = pInputSamples0U32[i] << shift0; |
10823 | drflac_uint32 side = pInputSamples1U32[i] << shift1; |
10824 | drflac_uint32 right = left - side; |
10825 | |
10826 | pOutputSamples[i*2+0] = (drflac_int32)left / 8388608.0f; |
10827 | pOutputSamples[i*2+1] = (drflac_int32)right / 8388608.0f; |
10828 | } |
10829 | } |
10830 | #endif |
10831 | |
10832 | 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) |
10833 | { |
10834 | #if defined(DRFLAC_SUPPORT_SSE2) |
10835 | if (drflac__gIsSSE2Supported && pFlac->bitsPerSample <= 24) { |
10836 | drflac_read_pcm_frames_f32__decode_left_side__sse2(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
10837 | } else |
10838 | #elif defined(DRFLAC_SUPPORT_NEON) |
10839 | if (drflac__gIsNEONSupported && pFlac->bitsPerSample <= 24) { |
10840 | drflac_read_pcm_frames_f32__decode_left_side__neon(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
10841 | } else |
10842 | #endif |
10843 | { |
10844 | /* Scalar fallback. */ |
9e052883 |
10845 | #if 0 |
10846 | drflac_read_pcm_frames_f32__decode_left_side__reference(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
10847 | #else |
2ff0b512 |
10848 | drflac_read_pcm_frames_f32__decode_left_side__scalar(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
9e052883 |
10849 | #endif |
2ff0b512 |
10850 | } |
10851 | } |
10852 | |
10853 | |
9e052883 |
10854 | #if 0 |
10855 | static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_right_side__reference(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) |
10856 | { |
10857 | drflac_uint64 i; |
10858 | for (i = 0; i < frameCount; ++i) { |
10859 | drflac_uint32 side = (drflac_uint32)pInputSamples0[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); |
10860 | drflac_uint32 right = (drflac_uint32)pInputSamples1[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); |
10861 | drflac_uint32 left = right + side; |
10862 | |
10863 | pOutputSamples[i*2+0] = (float)((drflac_int32)left / 2147483648.0); |
10864 | pOutputSamples[i*2+1] = (float)((drflac_int32)right / 2147483648.0); |
10865 | } |
10866 | } |
10867 | #endif |
10868 | |
2ff0b512 |
10869 | 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) |
10870 | { |
10871 | drflac_uint64 i; |
10872 | drflac_uint64 frameCount4 = frameCount >> 2; |
10873 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
10874 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
10875 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
10876 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
10877 | float factor = 1 / 2147483648.0; |
10878 | |
10879 | for (i = 0; i < frameCount4; ++i) { |
10880 | drflac_uint32 side0 = pInputSamples0U32[i*4+0] << shift0; |
10881 | drflac_uint32 side1 = pInputSamples0U32[i*4+1] << shift0; |
10882 | drflac_uint32 side2 = pInputSamples0U32[i*4+2] << shift0; |
10883 | drflac_uint32 side3 = pInputSamples0U32[i*4+3] << shift0; |
10884 | |
10885 | drflac_uint32 right0 = pInputSamples1U32[i*4+0] << shift1; |
10886 | drflac_uint32 right1 = pInputSamples1U32[i*4+1] << shift1; |
10887 | drflac_uint32 right2 = pInputSamples1U32[i*4+2] << shift1; |
10888 | drflac_uint32 right3 = pInputSamples1U32[i*4+3] << shift1; |
10889 | |
10890 | drflac_uint32 left0 = right0 + side0; |
10891 | drflac_uint32 left1 = right1 + side1; |
10892 | drflac_uint32 left2 = right2 + side2; |
10893 | drflac_uint32 left3 = right3 + side3; |
10894 | |
10895 | pOutputSamples[i*8+0] = (drflac_int32)left0 * factor; |
10896 | pOutputSamples[i*8+1] = (drflac_int32)right0 * factor; |
10897 | pOutputSamples[i*8+2] = (drflac_int32)left1 * factor; |
10898 | pOutputSamples[i*8+3] = (drflac_int32)right1 * factor; |
10899 | pOutputSamples[i*8+4] = (drflac_int32)left2 * factor; |
10900 | pOutputSamples[i*8+5] = (drflac_int32)right2 * factor; |
10901 | pOutputSamples[i*8+6] = (drflac_int32)left3 * factor; |
10902 | pOutputSamples[i*8+7] = (drflac_int32)right3 * factor; |
10903 | } |
10904 | |
10905 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
10906 | drflac_uint32 side = pInputSamples0U32[i] << shift0; |
10907 | drflac_uint32 right = pInputSamples1U32[i] << shift1; |
10908 | drflac_uint32 left = right + side; |
10909 | |
10910 | pOutputSamples[i*2+0] = (drflac_int32)left * factor; |
10911 | pOutputSamples[i*2+1] = (drflac_int32)right * factor; |
10912 | } |
10913 | } |
10914 | |
10915 | #if defined(DRFLAC_SUPPORT_SSE2) |
10916 | 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) |
10917 | { |
10918 | drflac_uint64 i; |
10919 | drflac_uint64 frameCount4 = frameCount >> 2; |
10920 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
10921 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
10922 | drflac_uint32 shift0 = (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample) - 8; |
10923 | drflac_uint32 shift1 = (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample) - 8; |
10924 | __m128 factor; |
10925 | |
10926 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
10927 | |
10928 | factor = _mm_set1_ps(1.0f / 8388608.0f); |
10929 | |
10930 | for (i = 0; i < frameCount4; ++i) { |
10931 | __m128i side = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), shift0); |
10932 | __m128i right = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), shift1); |
10933 | __m128i left = _mm_add_epi32(right, side); |
10934 | __m128 leftf = _mm_mul_ps(_mm_cvtepi32_ps(left), factor); |
10935 | __m128 rightf = _mm_mul_ps(_mm_cvtepi32_ps(right), factor); |
10936 | |
10937 | _mm_storeu_ps(pOutputSamples + i*8 + 0, _mm_unpacklo_ps(leftf, rightf)); |
10938 | _mm_storeu_ps(pOutputSamples + i*8 + 4, _mm_unpackhi_ps(leftf, rightf)); |
10939 | } |
10940 | |
10941 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
10942 | drflac_uint32 side = pInputSamples0U32[i] << shift0; |
10943 | drflac_uint32 right = pInputSamples1U32[i] << shift1; |
10944 | drflac_uint32 left = right + side; |
10945 | |
10946 | pOutputSamples[i*2+0] = (drflac_int32)left / 8388608.0f; |
10947 | pOutputSamples[i*2+1] = (drflac_int32)right / 8388608.0f; |
10948 | } |
10949 | } |
10950 | #endif |
10951 | |
10952 | #if defined(DRFLAC_SUPPORT_NEON) |
10953 | 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) |
10954 | { |
10955 | drflac_uint64 i; |
10956 | drflac_uint64 frameCount4 = frameCount >> 2; |
10957 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
10958 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
10959 | drflac_uint32 shift0 = (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample) - 8; |
10960 | drflac_uint32 shift1 = (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample) - 8; |
10961 | float32x4_t factor4; |
10962 | int32x4_t shift0_4; |
10963 | int32x4_t shift1_4; |
10964 | |
10965 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
10966 | |
10967 | factor4 = vdupq_n_f32(1.0f / 8388608.0f); |
10968 | shift0_4 = vdupq_n_s32(shift0); |
10969 | shift1_4 = vdupq_n_s32(shift1); |
10970 | |
10971 | for (i = 0; i < frameCount4; ++i) { |
10972 | uint32x4_t side; |
10973 | uint32x4_t right; |
10974 | uint32x4_t left; |
10975 | float32x4_t leftf; |
10976 | float32x4_t rightf; |
10977 | |
10978 | side = vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), shift0_4); |
10979 | right = vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), shift1_4); |
10980 | left = vaddq_u32(right, side); |
10981 | leftf = vmulq_f32(vcvtq_f32_s32(vreinterpretq_s32_u32(left)), factor4); |
10982 | rightf = vmulq_f32(vcvtq_f32_s32(vreinterpretq_s32_u32(right)), factor4); |
10983 | |
10984 | drflac__vst2q_f32(pOutputSamples + i*8, vzipq_f32(leftf, rightf)); |
10985 | } |
10986 | |
10987 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
10988 | drflac_uint32 side = pInputSamples0U32[i] << shift0; |
10989 | drflac_uint32 right = pInputSamples1U32[i] << shift1; |
10990 | drflac_uint32 left = right + side; |
10991 | |
10992 | pOutputSamples[i*2+0] = (drflac_int32)left / 8388608.0f; |
10993 | pOutputSamples[i*2+1] = (drflac_int32)right / 8388608.0f; |
10994 | } |
10995 | } |
10996 | #endif |
10997 | |
10998 | 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) |
10999 | { |
11000 | #if defined(DRFLAC_SUPPORT_SSE2) |
11001 | if (drflac__gIsSSE2Supported && pFlac->bitsPerSample <= 24) { |
11002 | drflac_read_pcm_frames_f32__decode_right_side__sse2(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
11003 | } else |
11004 | #elif defined(DRFLAC_SUPPORT_NEON) |
11005 | if (drflac__gIsNEONSupported && pFlac->bitsPerSample <= 24) { |
11006 | drflac_read_pcm_frames_f32__decode_right_side__neon(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
11007 | } else |
11008 | #endif |
11009 | { |
11010 | /* Scalar fallback. */ |
9e052883 |
11011 | #if 0 |
11012 | drflac_read_pcm_frames_f32__decode_right_side__reference(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
11013 | #else |
2ff0b512 |
11014 | drflac_read_pcm_frames_f32__decode_right_side__scalar(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
9e052883 |
11015 | #endif |
11016 | } |
11017 | } |
11018 | |
11019 | |
11020 | #if 0 |
11021 | static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_mid_side__reference(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) |
11022 | { |
11023 | for (drflac_uint64 i = 0; i < frameCount; ++i) { |
11024 | drflac_uint32 mid = (drflac_uint32)pInputSamples0[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
11025 | drflac_uint32 side = (drflac_uint32)pInputSamples1[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
11026 | |
11027 | mid = (mid << 1) | (side & 0x01); |
11028 | |
11029 | pOutputSamples[i*2+0] = (float)((((drflac_int32)(mid + side) >> 1) << (unusedBitsPerSample)) / 2147483648.0); |
11030 | pOutputSamples[i*2+1] = (float)((((drflac_int32)(mid - side) >> 1) << (unusedBitsPerSample)) / 2147483648.0); |
2ff0b512 |
11031 | } |
11032 | } |
9e052883 |
11033 | #endif |
2ff0b512 |
11034 | |
11035 | 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) |
11036 | { |
11037 | drflac_uint64 i; |
11038 | drflac_uint64 frameCount4 = frameCount >> 2; |
11039 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
11040 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
11041 | drflac_uint32 shift = unusedBitsPerSample; |
11042 | float factor = 1 / 2147483648.0; |
11043 | |
11044 | if (shift > 0) { |
11045 | shift -= 1; |
11046 | for (i = 0; i < frameCount4; ++i) { |
11047 | drflac_uint32 temp0L; |
11048 | drflac_uint32 temp1L; |
11049 | drflac_uint32 temp2L; |
11050 | drflac_uint32 temp3L; |
11051 | drflac_uint32 temp0R; |
11052 | drflac_uint32 temp1R; |
11053 | drflac_uint32 temp2R; |
11054 | drflac_uint32 temp3R; |
11055 | |
11056 | drflac_uint32 mid0 = pInputSamples0U32[i*4+0] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
11057 | drflac_uint32 mid1 = pInputSamples0U32[i*4+1] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
11058 | drflac_uint32 mid2 = pInputSamples0U32[i*4+2] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
11059 | drflac_uint32 mid3 = pInputSamples0U32[i*4+3] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
11060 | |
11061 | drflac_uint32 side0 = pInputSamples1U32[i*4+0] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
11062 | drflac_uint32 side1 = pInputSamples1U32[i*4+1] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
11063 | drflac_uint32 side2 = pInputSamples1U32[i*4+2] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
11064 | drflac_uint32 side3 = pInputSamples1U32[i*4+3] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
11065 | |
11066 | mid0 = (mid0 << 1) | (side0 & 0x01); |
11067 | mid1 = (mid1 << 1) | (side1 & 0x01); |
11068 | mid2 = (mid2 << 1) | (side2 & 0x01); |
11069 | mid3 = (mid3 << 1) | (side3 & 0x01); |
11070 | |
11071 | temp0L = (mid0 + side0) << shift; |
11072 | temp1L = (mid1 + side1) << shift; |
11073 | temp2L = (mid2 + side2) << shift; |
11074 | temp3L = (mid3 + side3) << shift; |
11075 | |
11076 | temp0R = (mid0 - side0) << shift; |
11077 | temp1R = (mid1 - side1) << shift; |
11078 | temp2R = (mid2 - side2) << shift; |
11079 | temp3R = (mid3 - side3) << shift; |
11080 | |
11081 | pOutputSamples[i*8+0] = (drflac_int32)temp0L * factor; |
11082 | pOutputSamples[i*8+1] = (drflac_int32)temp0R * factor; |
11083 | pOutputSamples[i*8+2] = (drflac_int32)temp1L * factor; |
11084 | pOutputSamples[i*8+3] = (drflac_int32)temp1R * factor; |
11085 | pOutputSamples[i*8+4] = (drflac_int32)temp2L * factor; |
11086 | pOutputSamples[i*8+5] = (drflac_int32)temp2R * factor; |
11087 | pOutputSamples[i*8+6] = (drflac_int32)temp3L * factor; |
11088 | pOutputSamples[i*8+7] = (drflac_int32)temp3R * factor; |
11089 | } |
11090 | } else { |
11091 | for (i = 0; i < frameCount4; ++i) { |
11092 | drflac_uint32 temp0L; |
11093 | drflac_uint32 temp1L; |
11094 | drflac_uint32 temp2L; |
11095 | drflac_uint32 temp3L; |
11096 | drflac_uint32 temp0R; |
11097 | drflac_uint32 temp1R; |
11098 | drflac_uint32 temp2R; |
11099 | drflac_uint32 temp3R; |
11100 | |
11101 | drflac_uint32 mid0 = pInputSamples0U32[i*4+0] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
11102 | drflac_uint32 mid1 = pInputSamples0U32[i*4+1] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
11103 | drflac_uint32 mid2 = pInputSamples0U32[i*4+2] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
11104 | drflac_uint32 mid3 = pInputSamples0U32[i*4+3] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
11105 | |
11106 | drflac_uint32 side0 = pInputSamples1U32[i*4+0] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
11107 | drflac_uint32 side1 = pInputSamples1U32[i*4+1] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
11108 | drflac_uint32 side2 = pInputSamples1U32[i*4+2] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
11109 | drflac_uint32 side3 = pInputSamples1U32[i*4+3] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
11110 | |
11111 | mid0 = (mid0 << 1) | (side0 & 0x01); |
11112 | mid1 = (mid1 << 1) | (side1 & 0x01); |
11113 | mid2 = (mid2 << 1) | (side2 & 0x01); |
11114 | mid3 = (mid3 << 1) | (side3 & 0x01); |
11115 | |
11116 | temp0L = (drflac_uint32)((drflac_int32)(mid0 + side0) >> 1); |
11117 | temp1L = (drflac_uint32)((drflac_int32)(mid1 + side1) >> 1); |
11118 | temp2L = (drflac_uint32)((drflac_int32)(mid2 + side2) >> 1); |
11119 | temp3L = (drflac_uint32)((drflac_int32)(mid3 + side3) >> 1); |
11120 | |
11121 | temp0R = (drflac_uint32)((drflac_int32)(mid0 - side0) >> 1); |
11122 | temp1R = (drflac_uint32)((drflac_int32)(mid1 - side1) >> 1); |
11123 | temp2R = (drflac_uint32)((drflac_int32)(mid2 - side2) >> 1); |
11124 | temp3R = (drflac_uint32)((drflac_int32)(mid3 - side3) >> 1); |
11125 | |
11126 | pOutputSamples[i*8+0] = (drflac_int32)temp0L * factor; |
11127 | pOutputSamples[i*8+1] = (drflac_int32)temp0R * factor; |
11128 | pOutputSamples[i*8+2] = (drflac_int32)temp1L * factor; |
11129 | pOutputSamples[i*8+3] = (drflac_int32)temp1R * factor; |
11130 | pOutputSamples[i*8+4] = (drflac_int32)temp2L * factor; |
11131 | pOutputSamples[i*8+5] = (drflac_int32)temp2R * factor; |
11132 | pOutputSamples[i*8+6] = (drflac_int32)temp3L * factor; |
11133 | pOutputSamples[i*8+7] = (drflac_int32)temp3R * factor; |
11134 | } |
11135 | } |
11136 | |
11137 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
11138 | drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
11139 | drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
11140 | |
11141 | mid = (mid << 1) | (side & 0x01); |
11142 | |
11143 | pOutputSamples[i*2+0] = (drflac_int32)((drflac_uint32)((drflac_int32)(mid + side) >> 1) << unusedBitsPerSample) * factor; |
11144 | pOutputSamples[i*2+1] = (drflac_int32)((drflac_uint32)((drflac_int32)(mid - side) >> 1) << unusedBitsPerSample) * factor; |
11145 | } |
11146 | } |
11147 | |
11148 | #if defined(DRFLAC_SUPPORT_SSE2) |
11149 | 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) |
11150 | { |
11151 | drflac_uint64 i; |
11152 | drflac_uint64 frameCount4 = frameCount >> 2; |
11153 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
11154 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
11155 | drflac_uint32 shift = unusedBitsPerSample - 8; |
11156 | float factor; |
11157 | __m128 factor128; |
11158 | |
11159 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
11160 | |
11161 | factor = 1.0f / 8388608.0f; |
11162 | factor128 = _mm_set1_ps(factor); |
11163 | |
11164 | if (shift == 0) { |
11165 | for (i = 0; i < frameCount4; ++i) { |
11166 | __m128i mid; |
11167 | __m128i side; |
11168 | __m128i tempL; |
11169 | __m128i tempR; |
11170 | __m128 leftf; |
11171 | __m128 rightf; |
11172 | |
11173 | mid = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); |
11174 | side = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); |
11175 | |
11176 | mid = _mm_or_si128(_mm_slli_epi32(mid, 1), _mm_and_si128(side, _mm_set1_epi32(0x01))); |
11177 | |
11178 | tempL = _mm_srai_epi32(_mm_add_epi32(mid, side), 1); |
11179 | tempR = _mm_srai_epi32(_mm_sub_epi32(mid, side), 1); |
11180 | |
11181 | leftf = _mm_mul_ps(_mm_cvtepi32_ps(tempL), factor128); |
11182 | rightf = _mm_mul_ps(_mm_cvtepi32_ps(tempR), factor128); |
11183 | |
11184 | _mm_storeu_ps(pOutputSamples + i*8 + 0, _mm_unpacklo_ps(leftf, rightf)); |
11185 | _mm_storeu_ps(pOutputSamples + i*8 + 4, _mm_unpackhi_ps(leftf, rightf)); |
11186 | } |
11187 | |
11188 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
11189 | drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
11190 | drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
11191 | |
11192 | mid = (mid << 1) | (side & 0x01); |
11193 | |
11194 | pOutputSamples[i*2+0] = ((drflac_int32)(mid + side) >> 1) * factor; |
11195 | pOutputSamples[i*2+1] = ((drflac_int32)(mid - side) >> 1) * factor; |
11196 | } |
11197 | } else { |
11198 | shift -= 1; |
11199 | for (i = 0; i < frameCount4; ++i) { |
11200 | __m128i mid; |
11201 | __m128i side; |
11202 | __m128i tempL; |
11203 | __m128i tempR; |
11204 | __m128 leftf; |
11205 | __m128 rightf; |
11206 | |
11207 | mid = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); |
11208 | side = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); |
11209 | |
11210 | mid = _mm_or_si128(_mm_slli_epi32(mid, 1), _mm_and_si128(side, _mm_set1_epi32(0x01))); |
11211 | |
11212 | tempL = _mm_slli_epi32(_mm_add_epi32(mid, side), shift); |
11213 | tempR = _mm_slli_epi32(_mm_sub_epi32(mid, side), shift); |
11214 | |
11215 | leftf = _mm_mul_ps(_mm_cvtepi32_ps(tempL), factor128); |
11216 | rightf = _mm_mul_ps(_mm_cvtepi32_ps(tempR), factor128); |
11217 | |
11218 | _mm_storeu_ps(pOutputSamples + i*8 + 0, _mm_unpacklo_ps(leftf, rightf)); |
11219 | _mm_storeu_ps(pOutputSamples + i*8 + 4, _mm_unpackhi_ps(leftf, rightf)); |
11220 | } |
11221 | |
11222 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
11223 | drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
11224 | drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
11225 | |
11226 | mid = (mid << 1) | (side & 0x01); |
11227 | |
11228 | pOutputSamples[i*2+0] = (drflac_int32)((mid + side) << shift) * factor; |
11229 | pOutputSamples[i*2+1] = (drflac_int32)((mid - side) << shift) * factor; |
11230 | } |
11231 | } |
11232 | } |
11233 | #endif |
11234 | |
11235 | #if defined(DRFLAC_SUPPORT_NEON) |
11236 | 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) |
11237 | { |
11238 | drflac_uint64 i; |
11239 | drflac_uint64 frameCount4 = frameCount >> 2; |
11240 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
11241 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
11242 | drflac_uint32 shift = unusedBitsPerSample - 8; |
11243 | float factor; |
11244 | float32x4_t factor4; |
11245 | int32x4_t shift4; |
11246 | int32x4_t wbps0_4; /* Wasted Bits Per Sample */ |
11247 | int32x4_t wbps1_4; /* Wasted Bits Per Sample */ |
11248 | |
11249 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 24); |
11250 | |
11251 | factor = 1.0f / 8388608.0f; |
11252 | factor4 = vdupq_n_f32(factor); |
11253 | wbps0_4 = vdupq_n_s32(pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample); |
11254 | wbps1_4 = vdupq_n_s32(pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample); |
11255 | |
11256 | if (shift == 0) { |
11257 | for (i = 0; i < frameCount4; ++i) { |
11258 | int32x4_t lefti; |
11259 | int32x4_t righti; |
11260 | float32x4_t leftf; |
11261 | float32x4_t rightf; |
11262 | |
11263 | uint32x4_t mid = vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), wbps0_4); |
11264 | uint32x4_t side = vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), wbps1_4); |
11265 | |
11266 | mid = vorrq_u32(vshlq_n_u32(mid, 1), vandq_u32(side, vdupq_n_u32(1))); |
11267 | |
11268 | lefti = vshrq_n_s32(vreinterpretq_s32_u32(vaddq_u32(mid, side)), 1); |
11269 | righti = vshrq_n_s32(vreinterpretq_s32_u32(vsubq_u32(mid, side)), 1); |
11270 | |
11271 | leftf = vmulq_f32(vcvtq_f32_s32(lefti), factor4); |
11272 | rightf = vmulq_f32(vcvtq_f32_s32(righti), factor4); |
11273 | |
11274 | drflac__vst2q_f32(pOutputSamples + i*8, vzipq_f32(leftf, rightf)); |
11275 | } |
11276 | |
11277 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
11278 | drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
11279 | drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
11280 | |
11281 | mid = (mid << 1) | (side & 0x01); |
11282 | |
11283 | pOutputSamples[i*2+0] = ((drflac_int32)(mid + side) >> 1) * factor; |
11284 | pOutputSamples[i*2+1] = ((drflac_int32)(mid - side) >> 1) * factor; |
11285 | } |
11286 | } else { |
11287 | shift -= 1; |
11288 | shift4 = vdupq_n_s32(shift); |
11289 | for (i = 0; i < frameCount4; ++i) { |
11290 | uint32x4_t mid; |
11291 | uint32x4_t side; |
11292 | int32x4_t lefti; |
11293 | int32x4_t righti; |
11294 | float32x4_t leftf; |
11295 | float32x4_t rightf; |
11296 | |
11297 | mid = vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), wbps0_4); |
11298 | side = vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), wbps1_4); |
11299 | |
11300 | mid = vorrq_u32(vshlq_n_u32(mid, 1), vandq_u32(side, vdupq_n_u32(1))); |
11301 | |
11302 | lefti = vreinterpretq_s32_u32(vshlq_u32(vaddq_u32(mid, side), shift4)); |
11303 | righti = vreinterpretq_s32_u32(vshlq_u32(vsubq_u32(mid, side), shift4)); |
11304 | |
11305 | leftf = vmulq_f32(vcvtq_f32_s32(lefti), factor4); |
11306 | rightf = vmulq_f32(vcvtq_f32_s32(righti), factor4); |
11307 | |
11308 | drflac__vst2q_f32(pOutputSamples + i*8, vzipq_f32(leftf, rightf)); |
11309 | } |
11310 | |
11311 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
11312 | drflac_uint32 mid = pInputSamples0U32[i] << pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
11313 | drflac_uint32 side = pInputSamples1U32[i] << pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
11314 | |
11315 | mid = (mid << 1) | (side & 0x01); |
11316 | |
11317 | pOutputSamples[i*2+0] = (drflac_int32)((mid + side) << shift) * factor; |
11318 | pOutputSamples[i*2+1] = (drflac_int32)((mid - side) << shift) * factor; |
11319 | } |
11320 | } |
11321 | } |
11322 | #endif |
11323 | |
11324 | 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) |
11325 | { |
11326 | #if defined(DRFLAC_SUPPORT_SSE2) |
11327 | if (drflac__gIsSSE2Supported && pFlac->bitsPerSample <= 24) { |
11328 | drflac_read_pcm_frames_f32__decode_mid_side__sse2(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
11329 | } else |
11330 | #elif defined(DRFLAC_SUPPORT_NEON) |
11331 | if (drflac__gIsNEONSupported && pFlac->bitsPerSample <= 24) { |
11332 | drflac_read_pcm_frames_f32__decode_mid_side__neon(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
11333 | } else |
11334 | #endif |
11335 | { |
11336 | /* Scalar fallback. */ |
9e052883 |
11337 | #if 0 |
11338 | drflac_read_pcm_frames_f32__decode_mid_side__reference(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
11339 | #else |
2ff0b512 |
11340 | drflac_read_pcm_frames_f32__decode_mid_side__scalar(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
9e052883 |
11341 | #endif |
11342 | } |
11343 | } |
11344 | |
11345 | #if 0 |
11346 | static DRFLAC_INLINE void drflac_read_pcm_frames_f32__decode_independent_stereo__reference(drflac* pFlac, drflac_uint64 frameCount, drflac_uint32 unusedBitsPerSample, const drflac_int32* pInputSamples0, const drflac_int32* pInputSamples1, float* pOutputSamples) |
11347 | { |
11348 | for (drflac_uint64 i = 0; i < frameCount; ++i) { |
11349 | pOutputSamples[i*2+0] = (float)((drflac_int32)((drflac_uint32)pInputSamples0[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample)) / 2147483648.0); |
11350 | pOutputSamples[i*2+1] = (float)((drflac_int32)((drflac_uint32)pInputSamples1[i] << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample)) / 2147483648.0); |
2ff0b512 |
11351 | } |
11352 | } |
9e052883 |
11353 | #endif |
2ff0b512 |
11354 | |
11355 | 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) |
11356 | { |
11357 | drflac_uint64 i; |
11358 | drflac_uint64 frameCount4 = frameCount >> 2; |
11359 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
11360 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
11361 | drflac_uint32 shift0 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample; |
11362 | drflac_uint32 shift1 = unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample; |
11363 | float factor = 1 / 2147483648.0; |
11364 | |
11365 | for (i = 0; i < frameCount4; ++i) { |
11366 | drflac_uint32 tempL0 = pInputSamples0U32[i*4+0] << shift0; |
11367 | drflac_uint32 tempL1 = pInputSamples0U32[i*4+1] << shift0; |
11368 | drflac_uint32 tempL2 = pInputSamples0U32[i*4+2] << shift0; |
11369 | drflac_uint32 tempL3 = pInputSamples0U32[i*4+3] << shift0; |
11370 | |
11371 | drflac_uint32 tempR0 = pInputSamples1U32[i*4+0] << shift1; |
11372 | drflac_uint32 tempR1 = pInputSamples1U32[i*4+1] << shift1; |
11373 | drflac_uint32 tempR2 = pInputSamples1U32[i*4+2] << shift1; |
11374 | drflac_uint32 tempR3 = pInputSamples1U32[i*4+3] << shift1; |
11375 | |
11376 | pOutputSamples[i*8+0] = (drflac_int32)tempL0 * factor; |
11377 | pOutputSamples[i*8+1] = (drflac_int32)tempR0 * factor; |
11378 | pOutputSamples[i*8+2] = (drflac_int32)tempL1 * factor; |
11379 | pOutputSamples[i*8+3] = (drflac_int32)tempR1 * factor; |
11380 | pOutputSamples[i*8+4] = (drflac_int32)tempL2 * factor; |
11381 | pOutputSamples[i*8+5] = (drflac_int32)tempR2 * factor; |
11382 | pOutputSamples[i*8+6] = (drflac_int32)tempL3 * factor; |
11383 | pOutputSamples[i*8+7] = (drflac_int32)tempR3 * factor; |
11384 | } |
11385 | |
11386 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
11387 | pOutputSamples[i*2+0] = (drflac_int32)(pInputSamples0U32[i] << shift0) * factor; |
11388 | pOutputSamples[i*2+1] = (drflac_int32)(pInputSamples1U32[i] << shift1) * factor; |
11389 | } |
11390 | } |
11391 | |
11392 | #if defined(DRFLAC_SUPPORT_SSE2) |
11393 | 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) |
11394 | { |
11395 | drflac_uint64 i; |
11396 | drflac_uint64 frameCount4 = frameCount >> 2; |
11397 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
11398 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
11399 | drflac_uint32 shift0 = (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample) - 8; |
11400 | drflac_uint32 shift1 = (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample) - 8; |
11401 | |
11402 | float factor = 1.0f / 8388608.0f; |
11403 | __m128 factor128 = _mm_set1_ps(factor); |
11404 | |
11405 | for (i = 0; i < frameCount4; ++i) { |
11406 | __m128i lefti; |
11407 | __m128i righti; |
11408 | __m128 leftf; |
11409 | __m128 rightf; |
11410 | |
11411 | lefti = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples0 + i), shift0); |
11412 | righti = _mm_slli_epi32(_mm_loadu_si128((const __m128i*)pInputSamples1 + i), shift1); |
11413 | |
11414 | leftf = _mm_mul_ps(_mm_cvtepi32_ps(lefti), factor128); |
11415 | rightf = _mm_mul_ps(_mm_cvtepi32_ps(righti), factor128); |
11416 | |
11417 | _mm_storeu_ps(pOutputSamples + i*8 + 0, _mm_unpacklo_ps(leftf, rightf)); |
11418 | _mm_storeu_ps(pOutputSamples + i*8 + 4, _mm_unpackhi_ps(leftf, rightf)); |
11419 | } |
11420 | |
11421 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
11422 | pOutputSamples[i*2+0] = (drflac_int32)(pInputSamples0U32[i] << shift0) * factor; |
11423 | pOutputSamples[i*2+1] = (drflac_int32)(pInputSamples1U32[i] << shift1) * factor; |
11424 | } |
11425 | } |
11426 | #endif |
11427 | |
11428 | #if defined(DRFLAC_SUPPORT_NEON) |
11429 | 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) |
11430 | { |
11431 | drflac_uint64 i; |
11432 | drflac_uint64 frameCount4 = frameCount >> 2; |
11433 | const drflac_uint32* pInputSamples0U32 = (const drflac_uint32*)pInputSamples0; |
11434 | const drflac_uint32* pInputSamples1U32 = (const drflac_uint32*)pInputSamples1; |
11435 | drflac_uint32 shift0 = (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[0].wastedBitsPerSample) - 8; |
11436 | drflac_uint32 shift1 = (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[1].wastedBitsPerSample) - 8; |
11437 | |
11438 | float factor = 1.0f / 8388608.0f; |
11439 | float32x4_t factor4 = vdupq_n_f32(factor); |
11440 | int32x4_t shift0_4 = vdupq_n_s32(shift0); |
11441 | int32x4_t shift1_4 = vdupq_n_s32(shift1); |
11442 | |
11443 | for (i = 0; i < frameCount4; ++i) { |
11444 | int32x4_t lefti; |
11445 | int32x4_t righti; |
11446 | float32x4_t leftf; |
11447 | float32x4_t rightf; |
11448 | |
11449 | lefti = vreinterpretq_s32_u32(vshlq_u32(vld1q_u32(pInputSamples0U32 + i*4), shift0_4)); |
11450 | righti = vreinterpretq_s32_u32(vshlq_u32(vld1q_u32(pInputSamples1U32 + i*4), shift1_4)); |
11451 | |
11452 | leftf = vmulq_f32(vcvtq_f32_s32(lefti), factor4); |
11453 | rightf = vmulq_f32(vcvtq_f32_s32(righti), factor4); |
11454 | |
11455 | drflac__vst2q_f32(pOutputSamples + i*8, vzipq_f32(leftf, rightf)); |
11456 | } |
11457 | |
11458 | for (i = (frameCount4 << 2); i < frameCount; ++i) { |
11459 | pOutputSamples[i*2+0] = (drflac_int32)(pInputSamples0U32[i] << shift0) * factor; |
11460 | pOutputSamples[i*2+1] = (drflac_int32)(pInputSamples1U32[i] << shift1) * factor; |
11461 | } |
11462 | } |
11463 | #endif |
11464 | |
11465 | 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) |
11466 | { |
11467 | #if defined(DRFLAC_SUPPORT_SSE2) |
11468 | if (drflac__gIsSSE2Supported && pFlac->bitsPerSample <= 24) { |
11469 | drflac_read_pcm_frames_f32__decode_independent_stereo__sse2(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
11470 | } else |
11471 | #elif defined(DRFLAC_SUPPORT_NEON) |
11472 | if (drflac__gIsNEONSupported && pFlac->bitsPerSample <= 24) { |
11473 | drflac_read_pcm_frames_f32__decode_independent_stereo__neon(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
11474 | } else |
11475 | #endif |
11476 | { |
11477 | /* Scalar fallback. */ |
9e052883 |
11478 | #if 0 |
11479 | drflac_read_pcm_frames_f32__decode_independent_stereo__reference(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
11480 | #else |
2ff0b512 |
11481 | drflac_read_pcm_frames_f32__decode_independent_stereo__scalar(pFlac, frameCount, unusedBitsPerSample, pInputSamples0, pInputSamples1, pOutputSamples); |
9e052883 |
11482 | #endif |
2ff0b512 |
11483 | } |
11484 | } |
11485 | |
11486 | DRFLAC_API drflac_uint64 drflac_read_pcm_frames_f32(drflac* pFlac, drflac_uint64 framesToRead, float* pBufferOut) |
11487 | { |
11488 | drflac_uint64 framesRead; |
11489 | drflac_uint32 unusedBitsPerSample; |
11490 | |
11491 | if (pFlac == NULL || framesToRead == 0) { |
11492 | return 0; |
11493 | } |
11494 | |
11495 | if (pBufferOut == NULL) { |
11496 | return drflac__seek_forward_by_pcm_frames(pFlac, framesToRead); |
11497 | } |
11498 | |
11499 | DRFLAC_ASSERT(pFlac->bitsPerSample <= 32); |
11500 | unusedBitsPerSample = 32 - pFlac->bitsPerSample; |
11501 | |
11502 | framesRead = 0; |
11503 | while (framesToRead > 0) { |
11504 | /* If we've run out of samples in this frame, go to the next. */ |
11505 | if (pFlac->currentFLACFrame.pcmFramesRemaining == 0) { |
11506 | if (!drflac__read_and_decode_next_flac_frame(pFlac)) { |
11507 | break; /* Couldn't read the next frame, so just break from the loop and return. */ |
11508 | } |
11509 | } else { |
11510 | unsigned int channelCount = drflac__get_channel_count_from_channel_assignment(pFlac->currentFLACFrame.header.channelAssignment); |
11511 | drflac_uint64 iFirstPCMFrame = pFlac->currentFLACFrame.header.blockSizeInPCMFrames - pFlac->currentFLACFrame.pcmFramesRemaining; |
11512 | drflac_uint64 frameCountThisIteration = framesToRead; |
11513 | |
11514 | if (frameCountThisIteration > pFlac->currentFLACFrame.pcmFramesRemaining) { |
11515 | frameCountThisIteration = pFlac->currentFLACFrame.pcmFramesRemaining; |
11516 | } |
11517 | |
11518 | if (channelCount == 2) { |
11519 | const drflac_int32* pDecodedSamples0 = pFlac->currentFLACFrame.subframes[0].pSamplesS32 + iFirstPCMFrame; |
11520 | const drflac_int32* pDecodedSamples1 = pFlac->currentFLACFrame.subframes[1].pSamplesS32 + iFirstPCMFrame; |
11521 | |
11522 | switch (pFlac->currentFLACFrame.header.channelAssignment) |
11523 | { |
11524 | case DRFLAC_CHANNEL_ASSIGNMENT_LEFT_SIDE: |
11525 | { |
11526 | drflac_read_pcm_frames_f32__decode_left_side(pFlac, frameCountThisIteration, unusedBitsPerSample, pDecodedSamples0, pDecodedSamples1, pBufferOut); |
11527 | } break; |
11528 | |
11529 | case DRFLAC_CHANNEL_ASSIGNMENT_RIGHT_SIDE: |
11530 | { |
11531 | drflac_read_pcm_frames_f32__decode_right_side(pFlac, frameCountThisIteration, unusedBitsPerSample, pDecodedSamples0, pDecodedSamples1, pBufferOut); |
11532 | } break; |
11533 | |
11534 | case DRFLAC_CHANNEL_ASSIGNMENT_MID_SIDE: |
11535 | { |
11536 | drflac_read_pcm_frames_f32__decode_mid_side(pFlac, frameCountThisIteration, unusedBitsPerSample, pDecodedSamples0, pDecodedSamples1, pBufferOut); |
11537 | } break; |
11538 | |
11539 | case DRFLAC_CHANNEL_ASSIGNMENT_INDEPENDENT: |
11540 | default: |
11541 | { |
11542 | drflac_read_pcm_frames_f32__decode_independent_stereo(pFlac, frameCountThisIteration, unusedBitsPerSample, pDecodedSamples0, pDecodedSamples1, pBufferOut); |
11543 | } break; |
11544 | } |
11545 | } else { |
11546 | /* Generic interleaving. */ |
11547 | drflac_uint64 i; |
11548 | for (i = 0; i < frameCountThisIteration; ++i) { |
11549 | unsigned int j; |
11550 | for (j = 0; j < channelCount; ++j) { |
11551 | drflac_int32 sampleS32 = (drflac_int32)((drflac_uint32)(pFlac->currentFLACFrame.subframes[j].pSamplesS32[iFirstPCMFrame + i]) << (unusedBitsPerSample + pFlac->currentFLACFrame.subframes[j].wastedBitsPerSample)); |
11552 | pBufferOut[(i*channelCount)+j] = (float)(sampleS32 / 2147483648.0); |
11553 | } |
11554 | } |
11555 | } |
11556 | |
11557 | framesRead += frameCountThisIteration; |
11558 | pBufferOut += frameCountThisIteration * channelCount; |
11559 | framesToRead -= frameCountThisIteration; |
11560 | pFlac->currentPCMFrame += frameCountThisIteration; |
11561 | pFlac->currentFLACFrame.pcmFramesRemaining -= (unsigned int)frameCountThisIteration; |
11562 | } |
11563 | } |
11564 | |
11565 | return framesRead; |
11566 | } |
11567 | |
11568 | |
11569 | DRFLAC_API drflac_bool32 drflac_seek_to_pcm_frame(drflac* pFlac, drflac_uint64 pcmFrameIndex) |
11570 | { |
11571 | if (pFlac == NULL) { |
11572 | return DRFLAC_FALSE; |
11573 | } |
11574 | |
11575 | /* Don't do anything if we're already on the seek point. */ |
11576 | if (pFlac->currentPCMFrame == pcmFrameIndex) { |
11577 | return DRFLAC_TRUE; |
11578 | } |
11579 | |
11580 | /* |
11581 | 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 |
11582 | when the decoder was opened. |
11583 | */ |
11584 | if (pFlac->firstFLACFramePosInBytes == 0) { |
11585 | return DRFLAC_FALSE; |
11586 | } |
11587 | |
11588 | if (pcmFrameIndex == 0) { |
11589 | pFlac->currentPCMFrame = 0; |
11590 | return drflac__seek_to_first_frame(pFlac); |
11591 | } else { |
11592 | drflac_bool32 wasSuccessful = DRFLAC_FALSE; |
9e052883 |
11593 | drflac_uint64 originalPCMFrame = pFlac->currentPCMFrame; |
2ff0b512 |
11594 | |
11595 | /* Clamp the sample to the end. */ |
11596 | if (pcmFrameIndex > pFlac->totalPCMFrameCount) { |
11597 | pcmFrameIndex = pFlac->totalPCMFrameCount; |
11598 | } |
11599 | |
11600 | /* If the target sample and the current sample are in the same frame we just move the position forward. */ |
11601 | if (pcmFrameIndex > pFlac->currentPCMFrame) { |
11602 | /* Forward. */ |
11603 | drflac_uint32 offset = (drflac_uint32)(pcmFrameIndex - pFlac->currentPCMFrame); |
11604 | if (pFlac->currentFLACFrame.pcmFramesRemaining > offset) { |
11605 | pFlac->currentFLACFrame.pcmFramesRemaining -= offset; |
11606 | pFlac->currentPCMFrame = pcmFrameIndex; |
11607 | return DRFLAC_TRUE; |
11608 | } |
11609 | } else { |
11610 | /* Backward. */ |
11611 | drflac_uint32 offsetAbs = (drflac_uint32)(pFlac->currentPCMFrame - pcmFrameIndex); |
11612 | drflac_uint32 currentFLACFramePCMFrameCount = pFlac->currentFLACFrame.header.blockSizeInPCMFrames; |
11613 | drflac_uint32 currentFLACFramePCMFramesConsumed = currentFLACFramePCMFrameCount - pFlac->currentFLACFrame.pcmFramesRemaining; |
11614 | if (currentFLACFramePCMFramesConsumed > offsetAbs) { |
11615 | pFlac->currentFLACFrame.pcmFramesRemaining += offsetAbs; |
11616 | pFlac->currentPCMFrame = pcmFrameIndex; |
11617 | return DRFLAC_TRUE; |
11618 | } |
11619 | } |
11620 | |
11621 | /* |
11622 | Different techniques depending on encapsulation. Using the native FLAC seektable with Ogg encapsulation is a bit awkward so |
11623 | we'll instead use Ogg's natural seeking facility. |
11624 | */ |
11625 | #ifndef DR_FLAC_NO_OGG |
11626 | if (pFlac->container == drflac_container_ogg) |
11627 | { |
11628 | wasSuccessful = drflac_ogg__seek_to_pcm_frame(pFlac, pcmFrameIndex); |
11629 | } |
11630 | else |
11631 | #endif |
11632 | { |
11633 | /* First try seeking via the seek table. If this fails, fall back to a brute force seek which is much slower. */ |
11634 | if (/*!wasSuccessful && */!pFlac->_noSeekTableSeek) { |
11635 | wasSuccessful = drflac__seek_to_pcm_frame__seek_table(pFlac, pcmFrameIndex); |
11636 | } |
11637 | |
11638 | #if !defined(DR_FLAC_NO_CRC) |
11639 | /* Fall back to binary search if seek table seeking fails. This requires the length of the stream to be known. */ |
11640 | if (!wasSuccessful && !pFlac->_noBinarySearchSeek && pFlac->totalPCMFrameCount > 0) { |
11641 | wasSuccessful = drflac__seek_to_pcm_frame__binary_search(pFlac, pcmFrameIndex); |
11642 | } |
11643 | #endif |
11644 | |
11645 | /* Fall back to brute force if all else fails. */ |
11646 | if (!wasSuccessful && !pFlac->_noBruteForceSeek) { |
11647 | wasSuccessful = drflac__seek_to_pcm_frame__brute_force(pFlac, pcmFrameIndex); |
11648 | } |
11649 | } |
11650 | |
9e052883 |
11651 | if (wasSuccessful) { |
11652 | pFlac->currentPCMFrame = pcmFrameIndex; |
11653 | } else { |
11654 | /* Seek failed. Try putting the decoder back to it's original state. */ |
11655 | if (drflac_seek_to_pcm_frame(pFlac, originalPCMFrame) == DRFLAC_FALSE) { |
11656 | /* Failed to seek back to the original PCM frame. Fall back to 0. */ |
11657 | drflac_seek_to_pcm_frame(pFlac, 0); |
11658 | } |
11659 | } |
11660 | |
2ff0b512 |
11661 | return wasSuccessful; |
11662 | } |
11663 | } |
11664 | |
11665 | |
11666 | |
11667 | /* High Level APIs */ |
11668 | |
11669 | #if defined(SIZE_MAX) |
11670 | #define DRFLAC_SIZE_MAX SIZE_MAX |
11671 | #else |
11672 | #if defined(DRFLAC_64BIT) |
11673 | #define DRFLAC_SIZE_MAX ((drflac_uint64)0xFFFFFFFFFFFFFFFF) |
11674 | #else |
11675 | #define DRFLAC_SIZE_MAX 0xFFFFFFFF |
11676 | #endif |
11677 | #endif |
11678 | |
11679 | |
11680 | /* Using a macro as the definition of the drflac__full_decode_and_close_*() API family. Sue me. */ |
11681 | #define DRFLAC_DEFINE_FULL_READ_AND_CLOSE(extension, type) \ |
11682 | static type* drflac__full_read_and_close_ ## extension (drflac* pFlac, unsigned int* channelsOut, unsigned int* sampleRateOut, drflac_uint64* totalPCMFrameCountOut)\ |
11683 | { \ |
11684 | type* pSampleData = NULL; \ |
11685 | drflac_uint64 totalPCMFrameCount; \ |
11686 | \ |
11687 | DRFLAC_ASSERT(pFlac != NULL); \ |
11688 | \ |
11689 | totalPCMFrameCount = pFlac->totalPCMFrameCount; \ |
11690 | \ |
11691 | if (totalPCMFrameCount == 0) { \ |
11692 | type buffer[4096]; \ |
11693 | drflac_uint64 pcmFramesRead; \ |
11694 | size_t sampleDataBufferSize = sizeof(buffer); \ |
11695 | \ |
11696 | pSampleData = (type*)drflac__malloc_from_callbacks(sampleDataBufferSize, &pFlac->allocationCallbacks); \ |
11697 | if (pSampleData == NULL) { \ |
11698 | goto on_error; \ |
11699 | } \ |
11700 | \ |
11701 | while ((pcmFramesRead = (drflac_uint64)drflac_read_pcm_frames_##extension(pFlac, sizeof(buffer)/sizeof(buffer[0])/pFlac->channels, buffer)) > 0) { \ |
11702 | if (((totalPCMFrameCount + pcmFramesRead) * pFlac->channels * sizeof(type)) > sampleDataBufferSize) { \ |
11703 | type* pNewSampleData; \ |
11704 | size_t newSampleDataBufferSize; \ |
11705 | \ |
11706 | newSampleDataBufferSize = sampleDataBufferSize * 2; \ |
11707 | pNewSampleData = (type*)drflac__realloc_from_callbacks(pSampleData, newSampleDataBufferSize, sampleDataBufferSize, &pFlac->allocationCallbacks); \ |
11708 | if (pNewSampleData == NULL) { \ |
11709 | drflac__free_from_callbacks(pSampleData, &pFlac->allocationCallbacks); \ |
11710 | goto on_error; \ |
11711 | } \ |
11712 | \ |
11713 | sampleDataBufferSize = newSampleDataBufferSize; \ |
11714 | pSampleData = pNewSampleData; \ |
11715 | } \ |
11716 | \ |
11717 | DRFLAC_COPY_MEMORY(pSampleData + (totalPCMFrameCount*pFlac->channels), buffer, (size_t)(pcmFramesRead*pFlac->channels*sizeof(type))); \ |
11718 | totalPCMFrameCount += pcmFramesRead; \ |
11719 | } \ |
11720 | \ |
11721 | /* At this point everything should be decoded, but we just want to fill the unused part buffer with silence - need to \ |
11722 | protect those ears from random noise! */ \ |
11723 | DRFLAC_ZERO_MEMORY(pSampleData + (totalPCMFrameCount*pFlac->channels), (size_t)(sampleDataBufferSize - totalPCMFrameCount*pFlac->channels*sizeof(type))); \ |
11724 | } else { \ |
11725 | drflac_uint64 dataSize = totalPCMFrameCount*pFlac->channels*sizeof(type); \ |
9e052883 |
11726 | if (dataSize > (drflac_uint64)DRFLAC_SIZE_MAX) { \ |
2ff0b512 |
11727 | goto on_error; /* The decoded data is too big. */ \ |
11728 | } \ |
11729 | \ |
11730 | pSampleData = (type*)drflac__malloc_from_callbacks((size_t)dataSize, &pFlac->allocationCallbacks); /* <-- Safe cast as per the check above. */ \ |
11731 | if (pSampleData == NULL) { \ |
11732 | goto on_error; \ |
11733 | } \ |
11734 | \ |
11735 | totalPCMFrameCount = drflac_read_pcm_frames_##extension(pFlac, pFlac->totalPCMFrameCount, pSampleData); \ |
11736 | } \ |
11737 | \ |
11738 | if (sampleRateOut) *sampleRateOut = pFlac->sampleRate; \ |
11739 | if (channelsOut) *channelsOut = pFlac->channels; \ |
11740 | if (totalPCMFrameCountOut) *totalPCMFrameCountOut = totalPCMFrameCount; \ |
11741 | \ |
11742 | drflac_close(pFlac); \ |
11743 | return pSampleData; \ |
11744 | \ |
11745 | on_error: \ |
11746 | drflac_close(pFlac); \ |
11747 | return NULL; \ |
11748 | } |
11749 | |
11750 | DRFLAC_DEFINE_FULL_READ_AND_CLOSE(s32, drflac_int32) |
11751 | DRFLAC_DEFINE_FULL_READ_AND_CLOSE(s16, drflac_int16) |
11752 | DRFLAC_DEFINE_FULL_READ_AND_CLOSE(f32, float) |
11753 | |
11754 | 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) |
11755 | { |
11756 | drflac* pFlac; |
11757 | |
11758 | if (channelsOut) { |
11759 | *channelsOut = 0; |
11760 | } |
11761 | if (sampleRateOut) { |
11762 | *sampleRateOut = 0; |
11763 | } |
11764 | if (totalPCMFrameCountOut) { |
11765 | *totalPCMFrameCountOut = 0; |
11766 | } |
11767 | |
11768 | pFlac = drflac_open(onRead, onSeek, pUserData, pAllocationCallbacks); |
11769 | if (pFlac == NULL) { |
11770 | return NULL; |
11771 | } |
11772 | |
11773 | return drflac__full_read_and_close_s32(pFlac, channelsOut, sampleRateOut, totalPCMFrameCountOut); |
11774 | } |
11775 | |
11776 | 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) |
11777 | { |
11778 | drflac* pFlac; |
11779 | |
11780 | if (channelsOut) { |
11781 | *channelsOut = 0; |
11782 | } |
11783 | if (sampleRateOut) { |
11784 | *sampleRateOut = 0; |
11785 | } |
11786 | if (totalPCMFrameCountOut) { |
11787 | *totalPCMFrameCountOut = 0; |
11788 | } |
11789 | |
11790 | pFlac = drflac_open(onRead, onSeek, pUserData, pAllocationCallbacks); |
11791 | if (pFlac == NULL) { |
11792 | return NULL; |
11793 | } |
11794 | |
11795 | return drflac__full_read_and_close_s16(pFlac, channelsOut, sampleRateOut, totalPCMFrameCountOut); |
11796 | } |
11797 | |
11798 | 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) |
11799 | { |
11800 | drflac* pFlac; |
11801 | |
11802 | if (channelsOut) { |
11803 | *channelsOut = 0; |
11804 | } |
11805 | if (sampleRateOut) { |
11806 | *sampleRateOut = 0; |
11807 | } |
11808 | if (totalPCMFrameCountOut) { |
11809 | *totalPCMFrameCountOut = 0; |
11810 | } |
11811 | |
11812 | pFlac = drflac_open(onRead, onSeek, pUserData, pAllocationCallbacks); |
11813 | if (pFlac == NULL) { |
11814 | return NULL; |
11815 | } |
11816 | |
11817 | return drflac__full_read_and_close_f32(pFlac, channelsOut, sampleRateOut, totalPCMFrameCountOut); |
11818 | } |
11819 | |
9e052883 |
11820 | #ifndef DR_FLAC_NO_STDIO |
11821 | DRFLAC_API drflac_int32* drflac_open_file_and_read_pcm_frames_s32(const char* filename, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalPCMFrameCount, const drflac_allocation_callbacks* pAllocationCallbacks) |
11822 | { |
11823 | drflac* pFlac; |
11824 | |
11825 | if (sampleRate) { |
11826 | *sampleRate = 0; |
11827 | } |
11828 | if (channels) { |
11829 | *channels = 0; |
11830 | } |
11831 | if (totalPCMFrameCount) { |
11832 | *totalPCMFrameCount = 0; |
11833 | } |
11834 | |
11835 | pFlac = drflac_open_file(filename, pAllocationCallbacks); |
11836 | if (pFlac == NULL) { |
11837 | return NULL; |
11838 | } |
11839 | |
11840 | return drflac__full_read_and_close_s32(pFlac, channels, sampleRate, totalPCMFrameCount); |
11841 | } |
11842 | |
11843 | DRFLAC_API drflac_int16* drflac_open_file_and_read_pcm_frames_s16(const char* filename, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalPCMFrameCount, const drflac_allocation_callbacks* pAllocationCallbacks) |
11844 | { |
11845 | drflac* pFlac; |
11846 | |
11847 | if (sampleRate) { |
11848 | *sampleRate = 0; |
11849 | } |
11850 | if (channels) { |
11851 | *channels = 0; |
11852 | } |
11853 | if (totalPCMFrameCount) { |
11854 | *totalPCMFrameCount = 0; |
11855 | } |
11856 | |
11857 | pFlac = drflac_open_file(filename, pAllocationCallbacks); |
11858 | if (pFlac == NULL) { |
11859 | return NULL; |
11860 | } |
11861 | |
11862 | return drflac__full_read_and_close_s16(pFlac, channels, sampleRate, totalPCMFrameCount); |
11863 | } |
11864 | |
11865 | DRFLAC_API float* drflac_open_file_and_read_pcm_frames_f32(const char* filename, unsigned int* channels, unsigned int* sampleRate, drflac_uint64* totalPCMFrameCount, const drflac_allocation_callbacks* pAllocationCallbacks) |
11866 | { |
11867 | drflac* pFlac; |
11868 | |
11869 | if (sampleRate) { |
11870 | *sampleRate = 0; |
11871 | } |
11872 | if (channels) { |
11873 | *channels = 0; |
11874 | } |
11875 | if (totalPCMFrameCount) { |
11876 | *totalPCMFrameCount = 0; |
11877 | } |
11878 | |
11879 | pFlac = drflac_open_file(filename, pAllocationCallbacks); |
11880 | if (pFlac == NULL) { |
11881 | return NULL; |
11882 | } |
11883 | |
11884 | return drflac__full_read_and_close_f32(pFlac, channels, sampleRate, totalPCMFrameCount); |
11885 | } |
11886 | #endif |
11887 | |
2ff0b512 |
11888 | 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) |
11889 | { |
11890 | drflac* pFlac; |
11891 | |
11892 | if (sampleRate) { |
11893 | *sampleRate = 0; |
11894 | } |
11895 | if (channels) { |
11896 | *channels = 0; |
11897 | } |
11898 | if (totalPCMFrameCount) { |
11899 | *totalPCMFrameCount = 0; |
11900 | } |
11901 | |
11902 | pFlac = drflac_open_memory(data, dataSize, pAllocationCallbacks); |
11903 | if (pFlac == NULL) { |
11904 | return NULL; |
11905 | } |
11906 | |
11907 | return drflac__full_read_and_close_s32(pFlac, channels, sampleRate, totalPCMFrameCount); |
11908 | } |
11909 | |
11910 | 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) |
11911 | { |
11912 | drflac* pFlac; |
11913 | |
11914 | if (sampleRate) { |
11915 | *sampleRate = 0; |
11916 | } |
11917 | if (channels) { |
11918 | *channels = 0; |
11919 | } |
11920 | if (totalPCMFrameCount) { |
11921 | *totalPCMFrameCount = 0; |
11922 | } |
11923 | |
11924 | pFlac = drflac_open_memory(data, dataSize, pAllocationCallbacks); |
11925 | if (pFlac == NULL) { |
11926 | return NULL; |
11927 | } |
11928 | |
11929 | return drflac__full_read_and_close_s16(pFlac, channels, sampleRate, totalPCMFrameCount); |
11930 | } |
11931 | |
11932 | 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) |
11933 | { |
11934 | drflac* pFlac; |
11935 | |
11936 | if (sampleRate) { |
11937 | *sampleRate = 0; |
11938 | } |
11939 | if (channels) { |
11940 | *channels = 0; |
11941 | } |
11942 | if (totalPCMFrameCount) { |
11943 | *totalPCMFrameCount = 0; |
11944 | } |
11945 | |
11946 | pFlac = drflac_open_memory(data, dataSize, pAllocationCallbacks); |
11947 | if (pFlac == NULL) { |
11948 | return NULL; |
11949 | } |
11950 | |
11951 | return drflac__full_read_and_close_f32(pFlac, channels, sampleRate, totalPCMFrameCount); |
11952 | } |
11953 | |
11954 | |
11955 | DRFLAC_API void drflac_free(void* p, const drflac_allocation_callbacks* pAllocationCallbacks) |
11956 | { |
11957 | if (pAllocationCallbacks != NULL) { |
11958 | drflac__free_from_callbacks(p, pAllocationCallbacks); |
11959 | } else { |
11960 | drflac__free_default(p, NULL); |
11961 | } |
11962 | } |
11963 | |
11964 | |
11965 | |
11966 | |
11967 | DRFLAC_API void drflac_init_vorbis_comment_iterator(drflac_vorbis_comment_iterator* pIter, drflac_uint32 commentCount, const void* pComments) |
11968 | { |
11969 | if (pIter == NULL) { |
11970 | return; |
11971 | } |
11972 | |
11973 | pIter->countRemaining = commentCount; |
11974 | pIter->pRunningData = (const char*)pComments; |
11975 | } |
11976 | |
11977 | DRFLAC_API const char* drflac_next_vorbis_comment(drflac_vorbis_comment_iterator* pIter, drflac_uint32* pCommentLengthOut) |
11978 | { |
11979 | drflac_int32 length; |
11980 | const char* pComment; |
11981 | |
11982 | /* Safety. */ |
11983 | if (pCommentLengthOut) { |
11984 | *pCommentLengthOut = 0; |
11985 | } |
11986 | |
11987 | if (pIter == NULL || pIter->countRemaining == 0 || pIter->pRunningData == NULL) { |
11988 | return NULL; |
11989 | } |
11990 | |
9e052883 |
11991 | length = drflac__le2host_32_ptr_unaligned(pIter->pRunningData); |
2ff0b512 |
11992 | pIter->pRunningData += 4; |
11993 | |
11994 | pComment = pIter->pRunningData; |
11995 | pIter->pRunningData += length; |
11996 | pIter->countRemaining -= 1; |
11997 | |
11998 | if (pCommentLengthOut) { |
11999 | *pCommentLengthOut = length; |
12000 | } |
12001 | |
12002 | return pComment; |
12003 | } |
12004 | |
12005 | |
12006 | |
12007 | |
12008 | DRFLAC_API void drflac_init_cuesheet_track_iterator(drflac_cuesheet_track_iterator* pIter, drflac_uint32 trackCount, const void* pTrackData) |
12009 | { |
12010 | if (pIter == NULL) { |
12011 | return; |
12012 | } |
12013 | |
12014 | pIter->countRemaining = trackCount; |
12015 | pIter->pRunningData = (const char*)pTrackData; |
12016 | } |
12017 | |
12018 | DRFLAC_API drflac_bool32 drflac_next_cuesheet_track(drflac_cuesheet_track_iterator* pIter, drflac_cuesheet_track* pCuesheetTrack) |
12019 | { |
12020 | drflac_cuesheet_track cuesheetTrack; |
12021 | const char* pRunningData; |
12022 | drflac_uint64 offsetHi; |
12023 | drflac_uint64 offsetLo; |
12024 | |
12025 | if (pIter == NULL || pIter->countRemaining == 0 || pIter->pRunningData == NULL) { |
12026 | return DRFLAC_FALSE; |
12027 | } |
12028 | |
12029 | pRunningData = pIter->pRunningData; |
12030 | |
12031 | offsetHi = drflac__be2host_32(*(const drflac_uint32*)pRunningData); pRunningData += 4; |
12032 | offsetLo = drflac__be2host_32(*(const drflac_uint32*)pRunningData); pRunningData += 4; |
12033 | cuesheetTrack.offset = offsetLo | (offsetHi << 32); |
12034 | cuesheetTrack.trackNumber = pRunningData[0]; pRunningData += 1; |
12035 | DRFLAC_COPY_MEMORY(cuesheetTrack.ISRC, pRunningData, sizeof(cuesheetTrack.ISRC)); pRunningData += 12; |
12036 | cuesheetTrack.isAudio = (pRunningData[0] & 0x80) != 0; |
12037 | cuesheetTrack.preEmphasis = (pRunningData[0] & 0x40) != 0; pRunningData += 14; |
12038 | cuesheetTrack.indexCount = pRunningData[0]; pRunningData += 1; |
12039 | cuesheetTrack.pIndexPoints = (const drflac_cuesheet_track_index*)pRunningData; pRunningData += cuesheetTrack.indexCount * sizeof(drflac_cuesheet_track_index); |
12040 | |
12041 | pIter->pRunningData = pRunningData; |
12042 | pIter->countRemaining -= 1; |
12043 | |
12044 | if (pCuesheetTrack) { |
12045 | *pCuesheetTrack = cuesheetTrack; |
12046 | } |
12047 | |
12048 | return DRFLAC_TRUE; |
12049 | } |
12050 | |
12051 | #if defined(__clang__) || (defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6))) |
12052 | #pragma GCC diagnostic pop |
12053 | #endif |
12054 | #endif /* dr_flac_c */ |
12055 | #endif /* DR_FLAC_IMPLEMENTATION */ |
12056 | |
12057 | |
12058 | /* |
12059 | REVISION HISTORY |
12060 | ================ |
9e052883 |
12061 | v0.12.39 - 2022-09-17 |
12062 | - Fix compilation with DJGPP. |
12063 | - Fix compilation error with Visual Studio 2019 and the ARM build. |
12064 | - Fix an error with SSE 4.1 detection. |
12065 | - Add support for disabling wchar_t with DR_WAV_NO_WCHAR. |
12066 | - Improve compatibility with compilers which lack support for explicit struct packing. |
12067 | - Improve compatibility with low-end and embedded hardware by reducing the amount of stack |
12068 | allocation when loading an Ogg encapsulated file. |
12069 | |
12070 | v0.12.38 - 2022-04-10 |
12071 | - Fix compilation error on older versions of GCC. |
12072 | |
12073 | v0.12.37 - 2022-02-12 |
12074 | - Improve ARM detection. |
12075 | |
12076 | v0.12.36 - 2022-02-07 |
12077 | - Fix a compilation error with the ARM build. |
12078 | |
12079 | v0.12.35 - 2022-02-06 |
12080 | - Fix a bug due to underestimating the amount of precision required for the prediction stage. |
12081 | - Fix some bugs found from fuzz testing. |
12082 | |
12083 | v0.12.34 - 2022-01-07 |
12084 | - Fix some misalignment bugs when reading metadata. |
12085 | |
12086 | v0.12.33 - 2021-12-22 |
12087 | - Fix a bug with seeking when the seek table does not start at PCM frame 0. |
12088 | |
12089 | v0.12.32 - 2021-12-11 |
12090 | - Fix a warning with Clang. |
12091 | |
12092 | v0.12.31 - 2021-08-16 |
12093 | - Silence some warnings. |
12094 | |
12095 | v0.12.30 - 2021-07-31 |
12096 | - Fix platform detection for ARM64. |
12097 | |
12098 | v0.12.29 - 2021-04-02 |
12099 | - Fix a bug where the running PCM frame index is set to an invalid value when over-seeking. |
12100 | - Fix a decoding error due to an incorrect validation check. |
12101 | |
2ff0b512 |
12102 | v0.12.28 - 2021-02-21 |
12103 | - Fix a warning due to referencing _MSC_VER when it is undefined. |
12104 | |
12105 | v0.12.27 - 2021-01-31 |
12106 | - Fix a static analysis warning. |
12107 | |
12108 | v0.12.26 - 2021-01-17 |
12109 | - Fix a compilation warning due to _BSD_SOURCE being deprecated. |
12110 | |
12111 | v0.12.25 - 2020-12-26 |
12112 | - Update documentation. |
12113 | |
12114 | v0.12.24 - 2020-11-29 |
12115 | - Fix ARM64/NEON detection when compiling with MSVC. |
12116 | |
12117 | v0.12.23 - 2020-11-21 |
12118 | - Fix compilation with OpenWatcom. |
12119 | |
12120 | v0.12.22 - 2020-11-01 |
12121 | - Fix an error with the previous release. |
12122 | |
12123 | v0.12.21 - 2020-11-01 |
12124 | - Fix a possible deadlock when seeking. |
12125 | - Improve compiler support for older versions of GCC. |
12126 | |
12127 | v0.12.20 - 2020-09-08 |
12128 | - Fix a compilation error on older compilers. |
12129 | |
12130 | v0.12.19 - 2020-08-30 |
12131 | - Fix a bug due to an undefined 32-bit shift. |
12132 | |
12133 | v0.12.18 - 2020-08-14 |
12134 | - Fix a crash when compiling with clang-cl. |
12135 | |
12136 | v0.12.17 - 2020-08-02 |
12137 | - Simplify sized types. |
12138 | |
12139 | v0.12.16 - 2020-07-25 |
12140 | - Fix a compilation warning. |
12141 | |
12142 | v0.12.15 - 2020-07-06 |
12143 | - Check for negative LPC shifts and return an error. |
12144 | |
12145 | v0.12.14 - 2020-06-23 |
12146 | - Add include guard for the implementation section. |
12147 | |
12148 | v0.12.13 - 2020-05-16 |
12149 | - Add compile-time and run-time version querying. |
12150 | - DRFLAC_VERSION_MINOR |
12151 | - DRFLAC_VERSION_MAJOR |
12152 | - DRFLAC_VERSION_REVISION |
12153 | - DRFLAC_VERSION_STRING |
12154 | - drflac_version() |
12155 | - drflac_version_string() |
12156 | |
12157 | v0.12.12 - 2020-04-30 |
12158 | - Fix compilation errors with VC6. |
12159 | |
12160 | v0.12.11 - 2020-04-19 |
12161 | - Fix some pedantic warnings. |
12162 | - Fix some undefined behaviour warnings. |
12163 | |
12164 | v0.12.10 - 2020-04-10 |
12165 | - Fix some bugs when trying to seek with an invalid seek table. |
12166 | |
12167 | v0.12.9 - 2020-04-05 |
12168 | - Fix warnings. |
12169 | |
12170 | v0.12.8 - 2020-04-04 |
12171 | - Add drflac_open_file_w() and drflac_open_file_with_metadata_w(). |
12172 | - Fix some static analysis warnings. |
12173 | - Minor documentation updates. |
12174 | |
12175 | v0.12.7 - 2020-03-14 |
12176 | - Fix compilation errors with VC6. |
12177 | |
12178 | v0.12.6 - 2020-03-07 |
12179 | - Fix compilation error with Visual Studio .NET 2003. |
12180 | |
12181 | v0.12.5 - 2020-01-30 |
12182 | - Silence some static analysis warnings. |
12183 | |
12184 | v0.12.4 - 2020-01-29 |
12185 | - Silence some static analysis warnings. |
12186 | |
12187 | v0.12.3 - 2019-12-02 |
12188 | - Fix some warnings when compiling with GCC and the -Og flag. |
12189 | - Fix a crash in out-of-memory situations. |
12190 | - Fix potential integer overflow bug. |
12191 | - Fix some static analysis warnings. |
12192 | - Fix a possible crash when using custom memory allocators without a custom realloc() implementation. |
12193 | - Fix a bug with binary search seeking where the bits per sample is not a multiple of 8. |
12194 | |
12195 | v0.12.2 - 2019-10-07 |
12196 | - Internal code clean up. |
12197 | |
12198 | v0.12.1 - 2019-09-29 |
12199 | - Fix some Clang Static Analyzer warnings. |
12200 | - Fix an unused variable warning. |
12201 | |
12202 | v0.12.0 - 2019-09-23 |
12203 | - API CHANGE: Add support for user defined memory allocation routines. This system allows the program to specify their own memory allocation |
12204 | routines with a user data pointer for client-specific contextual data. This adds an extra parameter to the end of the following APIs: |
12205 | - drflac_open() |
12206 | - drflac_open_relaxed() |
12207 | - drflac_open_with_metadata() |
12208 | - drflac_open_with_metadata_relaxed() |
12209 | - drflac_open_file() |
12210 | - drflac_open_file_with_metadata() |
12211 | - drflac_open_memory() |
12212 | - drflac_open_memory_with_metadata() |
12213 | - drflac_open_and_read_pcm_frames_s32() |
12214 | - drflac_open_and_read_pcm_frames_s16() |
12215 | - drflac_open_and_read_pcm_frames_f32() |
12216 | - drflac_open_file_and_read_pcm_frames_s32() |
12217 | - drflac_open_file_and_read_pcm_frames_s16() |
12218 | - drflac_open_file_and_read_pcm_frames_f32() |
12219 | - drflac_open_memory_and_read_pcm_frames_s32() |
12220 | - drflac_open_memory_and_read_pcm_frames_s16() |
12221 | - drflac_open_memory_and_read_pcm_frames_f32() |
12222 | Set this extra parameter to NULL to use defaults which is the same as the previous behaviour. Setting this NULL will use |
12223 | DRFLAC_MALLOC, DRFLAC_REALLOC and DRFLAC_FREE. |
12224 | - Remove deprecated APIs: |
12225 | - drflac_read_s32() |
12226 | - drflac_read_s16() |
12227 | - drflac_read_f32() |
12228 | - drflac_seek_to_sample() |
12229 | - drflac_open_and_decode_s32() |
12230 | - drflac_open_and_decode_s16() |
12231 | - drflac_open_and_decode_f32() |
12232 | - drflac_open_and_decode_file_s32() |
12233 | - drflac_open_and_decode_file_s16() |
12234 | - drflac_open_and_decode_file_f32() |
12235 | - drflac_open_and_decode_memory_s32() |
12236 | - drflac_open_and_decode_memory_s16() |
12237 | - drflac_open_and_decode_memory_f32() |
12238 | - Remove drflac.totalSampleCount which is now replaced with drflac.totalPCMFrameCount. You can emulate drflac.totalSampleCount |
12239 | by doing pFlac->totalPCMFrameCount*pFlac->channels. |
12240 | - Rename drflac.currentFrame to drflac.currentFLACFrame to remove ambiguity with PCM frames. |
12241 | - Fix errors when seeking to the end of a stream. |
12242 | - Optimizations to seeking. |
12243 | - SSE improvements and optimizations. |
12244 | - ARM NEON optimizations. |
12245 | - Optimizations to drflac_read_pcm_frames_s16(). |
12246 | - Optimizations to drflac_read_pcm_frames_s32(). |
12247 | |
12248 | v0.11.10 - 2019-06-26 |
12249 | - Fix a compiler error. |
12250 | |
12251 | v0.11.9 - 2019-06-16 |
12252 | - Silence some ThreadSanitizer warnings. |
12253 | |
12254 | v0.11.8 - 2019-05-21 |
12255 | - Fix warnings. |
12256 | |
12257 | v0.11.7 - 2019-05-06 |
12258 | - C89 fixes. |
12259 | |
12260 | v0.11.6 - 2019-05-05 |
12261 | - Add support for C89. |
12262 | - Fix a compiler warning when CRC is disabled. |
12263 | - Change license to choice of public domain or MIT-0. |
12264 | |
12265 | v0.11.5 - 2019-04-19 |
12266 | - Fix a compiler error with GCC. |
12267 | |
12268 | v0.11.4 - 2019-04-17 |
12269 | - Fix some warnings with GCC when compiling with -std=c99. |
12270 | |
12271 | v0.11.3 - 2019-04-07 |
12272 | - Silence warnings with GCC. |
12273 | |
12274 | v0.11.2 - 2019-03-10 |
12275 | - Fix a warning. |
12276 | |
12277 | v0.11.1 - 2019-02-17 |
12278 | - Fix a potential bug with seeking. |
12279 | |
12280 | v0.11.0 - 2018-12-16 |
12281 | - API CHANGE: Deprecated drflac_read_s32(), drflac_read_s16() and drflac_read_f32() and replaced them with |
12282 | drflac_read_pcm_frames_s32(), drflac_read_pcm_frames_s16() and drflac_read_pcm_frames_f32(). The new APIs take |
12283 | and return PCM frame counts instead of sample counts. To upgrade you will need to change the input count by |
12284 | dividing it by the channel count, and then do the same with the return value. |
12285 | - API_CHANGE: Deprecated drflac_seek_to_sample() and replaced with drflac_seek_to_pcm_frame(). Same rules as |
12286 | the changes to drflac_read_*() apply. |
12287 | - API CHANGE: Deprecated drflac_open_and_decode_*() and replaced with drflac_open_*_and_read_*(). Same rules as |
12288 | the changes to drflac_read_*() apply. |
12289 | - Optimizations. |
12290 | |
12291 | v0.10.0 - 2018-09-11 |
12292 | - Remove the DR_FLAC_NO_WIN32_IO option and the Win32 file IO functionality. If you need to use Win32 file IO you |
12293 | need to do it yourself via the callback API. |
12294 | - Fix the clang build. |
12295 | - Fix undefined behavior. |
12296 | - Fix errors with CUESHEET metdata blocks. |
12297 | - Add an API for iterating over each cuesheet track in the CUESHEET metadata block. This works the same way as the |
12298 | Vorbis comment API. |
12299 | - Other miscellaneous bug fixes, mostly relating to invalid FLAC streams. |
12300 | - Minor optimizations. |
12301 | |
12302 | v0.9.11 - 2018-08-29 |
12303 | - Fix a bug with sample reconstruction. |
12304 | |
12305 | v0.9.10 - 2018-08-07 |
12306 | - Improve 64-bit detection. |
12307 | |
12308 | v0.9.9 - 2018-08-05 |
12309 | - Fix C++ build on older versions of GCC. |
12310 | |
12311 | v0.9.8 - 2018-07-24 |
12312 | - Fix compilation errors. |
12313 | |
12314 | v0.9.7 - 2018-07-05 |
12315 | - Fix a warning. |
12316 | |
12317 | v0.9.6 - 2018-06-29 |
12318 | - Fix some typos. |
12319 | |
12320 | v0.9.5 - 2018-06-23 |
12321 | - Fix some warnings. |
12322 | |
12323 | v0.9.4 - 2018-06-14 |
12324 | - Optimizations to seeking. |
12325 | - Clean up. |
12326 | |
12327 | v0.9.3 - 2018-05-22 |
12328 | - Bug fix. |
12329 | |
12330 | v0.9.2 - 2018-05-12 |
12331 | - Fix a compilation error due to a missing break statement. |
12332 | |
12333 | v0.9.1 - 2018-04-29 |
12334 | - Fix compilation error with Clang. |
12335 | |
12336 | v0.9 - 2018-04-24 |
12337 | - Fix Clang build. |
12338 | - Start using major.minor.revision versioning. |
12339 | |
12340 | v0.8g - 2018-04-19 |
12341 | - Fix build on non-x86/x64 architectures. |
12342 | |
12343 | v0.8f - 2018-02-02 |
12344 | - Stop pretending to support changing rate/channels mid stream. |
12345 | |
12346 | v0.8e - 2018-02-01 |
12347 | - Fix a crash when the block size of a frame is larger than the maximum block size defined by the FLAC stream. |
12348 | - Fix a crash the the Rice partition order is invalid. |
12349 | |
12350 | v0.8d - 2017-09-22 |
12351 | - Add support for decoding streams with ID3 tags. ID3 tags are just skipped. |
12352 | |
12353 | v0.8c - 2017-09-07 |
12354 | - Fix warning on non-x86/x64 architectures. |
12355 | |
12356 | v0.8b - 2017-08-19 |
12357 | - Fix build on non-x86/x64 architectures. |
12358 | |
12359 | v0.8a - 2017-08-13 |
12360 | - A small optimization for the Clang build. |
12361 | |
12362 | v0.8 - 2017-08-12 |
12363 | - API CHANGE: Rename dr_* types to drflac_*. |
12364 | - Optimizations. This brings dr_flac back to about the same class of efficiency as the reference implementation. |
12365 | - Add support for custom implementations of malloc(), realloc(), etc. |
12366 | - Add CRC checking to Ogg encapsulated streams. |
12367 | - Fix VC++ 6 build. This is only for the C++ compiler. The C compiler is not currently supported. |
12368 | - Bug fixes. |
12369 | |
12370 | v0.7 - 2017-07-23 |
12371 | - Add support for opening a stream without a header block. To do this, use drflac_open_relaxed() / drflac_open_with_metadata_relaxed(). |
12372 | |
12373 | v0.6 - 2017-07-22 |
12374 | - Add support for recovering from invalid frames. With this change, dr_flac will simply skip over invalid frames as if they |
12375 | never existed. Frames are checked against their sync code, the CRC-8 of the frame header and the CRC-16 of the whole frame. |
12376 | |
12377 | v0.5 - 2017-07-16 |
12378 | - Fix typos. |
12379 | - Change drflac_bool* types to unsigned. |
12380 | - Add CRC checking. This makes dr_flac slower, but can be disabled with #define DR_FLAC_NO_CRC. |
12381 | |
12382 | v0.4f - 2017-03-10 |
12383 | - Fix a couple of bugs with the bitstreaming code. |
12384 | |
12385 | v0.4e - 2017-02-17 |
12386 | - Fix some warnings. |
12387 | |
12388 | v0.4d - 2016-12-26 |
12389 | - Add support for 32-bit floating-point PCM decoding. |
12390 | - Use drflac_int* and drflac_uint* sized types to improve compiler support. |
12391 | - Minor improvements to documentation. |
12392 | |
12393 | v0.4c - 2016-12-26 |
12394 | - Add support for signed 16-bit integer PCM decoding. |
12395 | |
12396 | v0.4b - 2016-10-23 |
12397 | - A minor change to drflac_bool8 and drflac_bool32 types. |
12398 | |
12399 | v0.4a - 2016-10-11 |
12400 | - Rename drBool32 to drflac_bool32 for styling consistency. |
12401 | |
12402 | v0.4 - 2016-09-29 |
12403 | - API/ABI CHANGE: Use fixed size 32-bit booleans instead of the built-in bool type. |
12404 | - API CHANGE: Rename drflac_open_and_decode*() to drflac_open_and_decode*_s32(). |
12405 | - API CHANGE: Swap the order of "channels" and "sampleRate" parameters in drflac_open_and_decode*(). Rationale for this is to |
12406 | keep it consistent with drflac_audio. |
12407 | |
12408 | v0.3f - 2016-09-21 |
12409 | - Fix a warning with GCC. |
12410 | |
12411 | v0.3e - 2016-09-18 |
12412 | - Fixed a bug where GCC 4.3+ was not getting properly identified. |
12413 | - Fixed a few typos. |
12414 | - Changed date formats to ISO 8601 (YYYY-MM-DD). |
12415 | |
12416 | v0.3d - 2016-06-11 |
12417 | - Minor clean up. |
12418 | |
12419 | v0.3c - 2016-05-28 |
12420 | - Fixed compilation error. |
12421 | |
12422 | v0.3b - 2016-05-16 |
12423 | - Fixed Linux/GCC build. |
12424 | - Updated documentation. |
12425 | |
12426 | v0.3a - 2016-05-15 |
12427 | - Minor fixes to documentation. |
12428 | |
12429 | v0.3 - 2016-05-11 |
12430 | - Optimizations. Now at about parity with the reference implementation on 32-bit builds. |
12431 | - Lots of clean up. |
12432 | |
12433 | v0.2b - 2016-05-10 |
12434 | - Bug fixes. |
12435 | |
12436 | v0.2a - 2016-05-10 |
12437 | - Made drflac_open_and_decode() more robust. |
12438 | - Removed an unused debugging variable |
12439 | |
12440 | v0.2 - 2016-05-09 |
12441 | - Added support for Ogg encapsulation. |
12442 | - API CHANGE. Have the onSeek callback take a third argument which specifies whether or not the seek |
12443 | should be relative to the start or the current position. Also changes the seeking rules such that |
12444 | seeking offsets will never be negative. |
12445 | - Have drflac_open_and_decode() fail gracefully if the stream has an unknown total sample count. |
12446 | |
12447 | v0.1b - 2016-05-07 |
12448 | - Properly close the file handle in drflac_open_file() and family when the decoder fails to initialize. |
12449 | - Removed a stale comment. |
12450 | |
12451 | v0.1a - 2016-05-05 |
12452 | - Minor formatting changes. |
12453 | - Fixed a warning on the GCC build. |
12454 | |
12455 | v0.1 - 2016-05-03 |
12456 | - Initial versioned release. |
12457 | */ |
12458 | |
12459 | /* |
12460 | This software is available as a choice of the following licenses. Choose |
12461 | whichever you prefer. |
12462 | |
12463 | =============================================================================== |
12464 | ALTERNATIVE 1 - Public Domain (www.unlicense.org) |
12465 | =============================================================================== |
12466 | This is free and unencumbered software released into the public domain. |
12467 | |
12468 | Anyone is free to copy, modify, publish, use, compile, sell, or distribute this |
12469 | software, either in source code form or as a compiled binary, for any purpose, |
12470 | commercial or non-commercial, and by any means. |
12471 | |
12472 | In jurisdictions that recognize copyright laws, the author or authors of this |
12473 | software dedicate any and all copyright interest in the software to the public |
12474 | domain. We make this dedication for the benefit of the public at large and to |
12475 | the detriment of our heirs and successors. We intend this dedication to be an |
12476 | overt act of relinquishment in perpetuity of all present and future rights to |
12477 | this software under copyright law. |
12478 | |
12479 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
12480 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
12481 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
12482 | AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
12483 | ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION |
12484 | WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
12485 | |
12486 | For more information, please refer to <http://unlicense.org/> |
12487 | |
12488 | =============================================================================== |
12489 | ALTERNATIVE 2 - MIT No Attribution |
12490 | =============================================================================== |
12491 | Copyright 2020 David Reid |
12492 | |
12493 | Permission is hereby granted, free of charge, to any person obtaining a copy of |
12494 | this software and associated documentation files (the "Software"), to deal in |
12495 | the Software without restriction, including without limitation the rights to |
12496 | use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies |
12497 | of the Software, and to permit persons to whom the Software is furnished to do |
12498 | so. |
12499 | |
12500 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
12501 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
12502 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
12503 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
12504 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
12505 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
12506 | SOFTWARE. |
12507 | */ |