-
-
Notifications
You must be signed in to change notification settings - Fork 0
/
oswrapper_audio.h
1157 lines (969 loc) · 47.6 KB
/
oswrapper_audio.h
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
OSWrapper audio: Decode audio files with the built in OS audio decoders.
Usage:
OSWrapper audio has 2 ways of decoding audio: from a path, or from memory.
In both cases, you pass a pointer to an OSWrapper_audio_spec struct,
which acts as both a way to hint at the wanted audio format,
and to receive the actual audio format and decoding context.
Decoding to integer and floating point PCM is generally well supported.
More output formats may be added in the future.
Example:
// Initialise the library
if (!oswrapper_audio_init()) {
// Error handling here
}
// Allocate an OSWrapper_audio_spec struct
OSWrapper_audio_spec* audio_spec = (OSWrapper_audio_spec*) malloc(sizeof(OSWrapper_audio_spec));
if (audio_spec == NULL) {
// Error handling here
}
// Hint the desired format
audio_spec->sample_rate = SAMPLE_RATE;
audio_spec->channel_count = CHANNEL_COUNT;
audio_spec->bits_per_channel = BITS_PER_CHANNEL;
audio_spec->audio_type = AUDIO_FORMAT;
// Load audio from memory:
// if (oswrapper_audio_load_from_memory(data, data_size, audio_spec)) {
// Load audio from a path to a file:
if (oswrapper_audio_load_from_path(path, audio_spec)) {
// audio_spec now contains the chosen format details (read-only, don't modify)
// Calculate the size of one frame of audio
size_t frame_size = (audio_spec->bits_per_channel / 8) * (audio_spec->channel_count);
// Allocate a buffer capable of containing 512 frames of audio
short* buffer = (short*) malloc(512 * frame_size);
if (buffer == NULL) {
// Error handling here
}
// Decode 512 frames of audio (or less, if the file is very small).
// OSWrapper audio will try to always give you as many frames as you request.
// 0 generally indicates EOF.
size_t decoded = oswrapper_audio_get_samples(audio_spec, buffer, 512);
// Do something with the frames of decoded audio
// Free the buffer
free(buffer);
// Free the decoding context
if (!oswrapper_audio_free_context(audio_spec)) {
// Error handling here
}
}
// Free the OSWrapper_audio_spec struct
free(audio_spec);
// Uninitialise the library
if (!oswrapper_audio_uninit()) {
// Error handling
}
In a real scenario, you'd generally loop until there is no more audio to be decoded,
or handle setting up callbacks for decoding audio as needed.
See test_oswrapper_audio for an audio decoding program
which fully decodes a file to PCM data, and writes it to a new file.
Platform requirements:
- On macOS, link with AudioToolbox
- On Windows, call CoInitialize before using the library,
and link with mfplat.lib, mfreadwrite.lib, and shlwapi.lib
The latest version of this file can be found at
https://github.com/NeRdTheNed/OSWrapper/blob/main/oswrapper_audio.h
*/
#ifndef OSWRAPPER_INCLUDE_OSWRAPPER_AUDIO_H
#define OSWRAPPER_INCLUDE_OSWRAPPER_AUDIO_H
#include <stddef.h>
#ifndef OSWRAPPER_AUDIO_DEF
#ifdef OSWRAPPER_AUDIO_STATIC
#define OSWRAPPER_AUDIO_DEF static
#else
#define OSWRAPPER_AUDIO_DEF extern
#endif
#endif /* OSWRAPPER_AUDIO_DEF */
/* You can make these functions return actual booleans if you want */
#ifndef OSWRAPPER_AUDIO_RESULT_TYPE
#define OSWRAPPER_AUDIO_RESULT_TYPE int
#endif
#ifndef OSWRAPPER_AUDIO_RESULT_SUCCESS
#define OSWRAPPER_AUDIO_RESULT_SUCCESS 1
#endif
#ifndef OSWRAPPER_AUDIO_RESULT_FAILURE
#define OSWRAPPER_AUDIO_RESULT_FAILURE 0
#endif
#ifdef OSWRAPPER_AUDIO_EXPERIMENTAL
/* Unstable-ish API */
#ifndef OSWRAPPER_AUDIO_SEEK_TYPE
#define OSWRAPPER_AUDIO_SEEK_TYPE long long
#endif
#endif /* OSWRAPPER_AUDIO_EXPERIMENTAL */
/* Stable-ish API */
/* What format the decoded audio is in. */
typedef enum {
OSWRAPPER_AUDIO_FORMAT_NOT_SET = 0,
OSWRAPPER_AUDIO_FORMAT_PCM_INTEGER,
OSWRAPPER_AUDIO_FORMAT_PCM_FLOAT
} OSWrapper_audio_type;
/* Endianness of the decoded audio. Most platforms use little-endian. */
typedef enum {
OSWRAPPER_AUDIO_ENDIANNESS_USE_SYSTEM_DEFAULT = 0,
OSWRAPPER_AUDIO_ENDIANNESS_LITTLE,
OSWRAPPER_AUDIO_ENDIANNESS_BIG
} OSWrapper_audio_endianness_type;
/* The created audio context.
The values can be set before creating an audio context
with the oswrapper_audio_load_from_ functions,
which will be treated as hints for choosing the output format for decoding.
The values should be treated as read-only once created, otherwise things will break.
Don't use the internal_data member,
it's for storing the platform-specific decoding context. */
typedef struct OSWrapper_audio_spec {
void* internal_data;
unsigned long sample_rate;
unsigned int channel_count;
unsigned int bits_per_channel;
OSWrapper_audio_type audio_type;
OSWrapper_audio_endianness_type endianness_type;
} OSWrapper_audio_spec;
/* Call oswrapper_audio_init() before using the library,
and call oswrapper_audio_uninit() after you're done using the library. */
OSWRAPPER_AUDIO_DEF OSWRAPPER_AUDIO_RESULT_TYPE oswrapper_audio_init(void);
OSWRAPPER_AUDIO_DEF OSWRAPPER_AUDIO_RESULT_TYPE oswrapper_audio_uninit(void);
/* Free resources associated with the given OSWrapper_audio_spec.
Returns 1 on success, or 0 on failure. */
OSWRAPPER_AUDIO_DEF OSWRAPPER_AUDIO_RESULT_TYPE oswrapper_audio_free_context(OSWrapper_audio_spec* audio);
/* Load a sound file from memory.
The passed memory may not be copied, and is not freed (you retain full control over it).
Therefore, the memory must stay valid until after you call oswrapper_audio_free_context.
You can set the values on the passed OSWrapper_audio_spec,
which will be treated as hints for choosing the output format for decoding.
The initialised audio context is returned in the passed OSWrapper_audio_spec,
which will also contain information about the output format (channels, sample rate etc.)
Returns 1 on success, or 0 on failure. */
OSWRAPPER_AUDIO_DEF OSWRAPPER_AUDIO_RESULT_TYPE oswrapper_audio_load_from_memory(const unsigned char* data, size_t data_size, OSWrapper_audio_spec* audio);
#ifndef OSWRAPPER_AUDIO_NO_LOAD_FROM_PATH
/* Load a sound file from the given path.
You can set the values on the passed OSWrapper_audio_spec,
which will be treated as hints for choosing the output format for decoding.
The initialised audio context is returned in the passed OSWrapper_audio_spec,
which will also contain information about the output format (channels, sample rate etc.)
Returns 1 on success, or 0 on failure. */
OSWRAPPER_AUDIO_DEF OSWRAPPER_AUDIO_RESULT_TYPE oswrapper_audio_load_from_path(const char* path, OSWrapper_audio_spec* audio);
#endif /* OSWRAPPER_AUDIO_NO_LOAD_FROM_PATH */
#ifdef OSWRAPPER_AUDIO_EXPERIMENTAL
/* Unstable-ish API */
/* Sets the value pointed to by pos to the current position.
Returns 1 on success, or 0 on failure. */
OSWRAPPER_AUDIO_DEF OSWRAPPER_AUDIO_RESULT_TYPE oswrapper_audio_get_pos(OSWrapper_audio_spec* audio, OSWRAPPER_AUDIO_SEEK_TYPE* pos);
/* Seek to the given position. */
OSWRAPPER_AUDIO_DEF void oswrapper_audio_seek(OSWrapper_audio_spec* audio, OSWRAPPER_AUDIO_SEEK_TYPE pos);
#endif /* OSWRAPPER_AUDIO_EXPERIMENTAL */
/* Seek to the start of the audio context. */
OSWRAPPER_AUDIO_DEF void oswrapper_audio_rewind(OSWrapper_audio_spec* audio);
/* Write decoded audio samples to the given buffer. The return value is the amount of samples written. */
OSWRAPPER_AUDIO_DEF size_t oswrapper_audio_get_samples(OSWrapper_audio_spec* audio, short* buffer, size_t frames_to_do);
#ifdef OSWRAPPER_AUDIO_IMPLEMENTATION
#ifndef OSWRAPPER_AUDIO_NO_INCLUDE_STDLIB
#include <stdlib.h>
#endif
#ifndef OSWRAPPER_AUDIO_NO_INCLUDE_STRING
#include <string.h>
#endif
#ifndef OSWRAPPER_AUDIO_MALLOC
#define OSWRAPPER_AUDIO_MALLOC(x) malloc(x)
#endif /* OSWRAPPER_AUDIO_MALLOC */
#ifndef OSWRAPPER_AUDIO_FREE
#define OSWRAPPER_AUDIO_FREE(x) free(x)
#endif /* OSWRAPPER_AUDIO_FREE */
#ifndef OSWRAPPER_AUDIO_MEMCPY
#define OSWRAPPER_AUDIO_MEMCPY(x, y, amount) memcpy(x, y, amount)
#endif /* OSWRAPPER_AUDIO_MEMCPY */
#ifndef OSWRAPPER_AUDIO_MEMCMP
#define OSWRAPPER_AUDIO_MEMCMP(ptr1, ptr2, amount) memcmp(ptr1, ptr2, amount)
#endif /* OSWRAPPER_AUDIO_MEMCMP */
#ifdef __APPLE__
#include <AvailabilityMacros.h>
#if defined(MAC_OS_X_VERSION_10_4) && MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_4
#if !defined(OSWRAPPER_AUDIO_USE_AUDIOTOOLBOX_IMPL) && !defined(OSWRAPPER_AUDIO_NO_USE_AUDIOTOOLBOX_IMPL)
#define OSWRAPPER_AUDIO_USE_AUDIOTOOLBOX_IMPL
#endif /* !defined(OSWRAPPER_AUDIO_USE_AUDIOTOOLBOX_IMPL) && !defined(OSWRAPPER_AUDIO_NO_USE_AUDIOTOOLBOX_IMPL) */
#endif /* defined(MAC_OS_X_VERSION_10_4) && MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_4 */
#endif /* __APPLE__ */
#if defined(_WIN32) || defined(__WIN32__) || defined(WIN32)
#if !defined(OSWRAPPER_AUDIO_USE_WIN_MF_IMPL) && !defined(OSWRAPPER_AUDIO_NO_USE_WIN_MF_IMPL)
#define OSWRAPPER_AUDIO_USE_WIN_MF_IMPL
#endif /* !defined(OSWRAPPER_AUDIO_USE_WIN_MF_IMPL) && !defined(OSWRAPPER_AUDIO_NO_USE_WIN_MF_IMPL) */
#endif
#ifdef OSWRAPPER_AUDIO_USE_AUDIOTOOLBOX_IMPL
/* Start macOS AudioToolbox implementation */
#include <AudioToolbox/AudioConverter.h>
#if !defined(MAC_OS_X_VERSION_10_6) || MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_6
#include <CoreServices/CoreServices.h>
#endif
#include <AudioToolbox/ExtendedAudioFile.h>
#include <AvailabilityMacros.h>
#if (!defined(MAC_OS_X_VERSION_10_6) || MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_6) && !defined(kAudioFileReadPermission)
#define kAudioFileReadPermission 0x01
#endif
#if (!defined(MAC_OS_X_VERSION_10_13) || MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_13) && !defined(kAudioFormatFLAC)
#define kAudioFormatFLAC 'flac'
#endif
typedef struct oswrapper_audio__callback_data_mac {
size_t data_size;
const unsigned char* data;
} oswrapper_audio__callback_data_mac;
typedef struct oswrapper_audio__internal_data_mac {
AudioFileID audio_file;
ExtAudioFileRef audio_file_ext;
oswrapper_audio__callback_data_mac* callback_data;
} oswrapper_audio__internal_data_mac;
static OSStatus oswrapper_audio__audio_file_read_callback(void* inClientData, SInt64 inPosition, UInt32 requestCount, void* buffer, UInt32* actualCount) {
size_t bytes_read;
oswrapper_audio__callback_data_mac* callback_data = (oswrapper_audio__callback_data_mac*) inClientData;
if (inPosition < (SInt64) callback_data->data_size) {
size_t bytes_available = callback_data->data_size - inPosition;
bytes_read = requestCount <= bytes_available ? requestCount : bytes_available;
OSWRAPPER_AUDIO_MEMCPY((buffer), (callback_data->data + inPosition), (bytes_read));
} else {
bytes_read = 0;
}
if (actualCount != NULL) {
*actualCount = bytes_read;
}
return 0;
}
static SInt64 oswrapper_audio__audio_file_get_size_callback(void* inClientData) {
oswrapper_audio__callback_data_mac* callback_data = (oswrapper_audio__callback_data_mac*) inClientData;
return callback_data->data_size;
}
OSWRAPPER_AUDIO_DEF OSWRAPPER_AUDIO_RESULT_TYPE oswrapper_audio_init(void) {
return OSWRAPPER_AUDIO_RESULT_SUCCESS;
}
OSWRAPPER_AUDIO_DEF OSWRAPPER_AUDIO_RESULT_TYPE oswrapper_audio_uninit(void) {
return OSWRAPPER_AUDIO_RESULT_SUCCESS;
}
OSWRAPPER_AUDIO_DEF OSWRAPPER_AUDIO_RESULT_TYPE oswrapper_audio_free_context(OSWrapper_audio_spec* audio) {
OSStatus error;
oswrapper_audio__internal_data_mac* internal_data = (oswrapper_audio__internal_data_mac*) audio->internal_data;
error = ExtAudioFileDispose(internal_data->audio_file_ext);
if (!error) {
error = AudioFileClose(internal_data->audio_file);
if (!error) {
/* callback_data is only used for in-memory decoding, so this is expected to be NULL when decoding files. */
#ifndef OSWRAPPER_AUDIO_NO_LOAD_FROM_PATH
if (internal_data->callback_data != NULL)
#endif
{
OSWRAPPER_AUDIO_FREE(internal_data->callback_data);
}
OSWRAPPER_AUDIO_FREE(audio->internal_data);
return OSWRAPPER_AUDIO_RESULT_SUCCESS;
}
}
return OSWRAPPER_AUDIO_RESULT_FAILURE;
}
static OSWRAPPER_AUDIO_RESULT_TYPE oswrapper_audio__load_from_open(AudioFileID audio_file, oswrapper_audio__callback_data_mac* callback_data, OSWrapper_audio_spec* audio) {
OSStatus error;
ExtAudioFileRef audio_file_ext;
error = ExtAudioFileWrapAudioFileID(audio_file, false, &audio_file_ext);
if (!error) {
AudioStreamBasicDescription input_file_format;
UInt32 property_size = sizeof(AudioStreamBasicDescription);
error = ExtAudioFileGetProperty(audio_file_ext, kExtAudioFileProperty_FileDataFormat, &property_size, &input_file_format);
if (!error) {
AudioStreamBasicDescription output_format;
output_format.mFormatID = kAudioFormatLinearPCM;
/* Use hinted output format */
if (audio->audio_type == OSWRAPPER_AUDIO_FORMAT_PCM_FLOAT) {
output_format.mFormatFlags = kLinearPCMFormatFlagIsFloat;
} else if (audio->audio_type == OSWRAPPER_AUDIO_FORMAT_PCM_INTEGER) {
output_format.mFormatFlags = kLinearPCMFormatFlagIsSignedInteger;
} else if (input_file_format.mFormatID == kAudioFormatLinearPCM && input_file_format.mFormatFlags & kLinearPCMFormatFlagIsFloat) {
output_format.mFormatFlags = kLinearPCMFormatFlagIsFloat;
} else {
output_format.mFormatFlags = kLinearPCMFormatFlagIsSignedInteger;
}
output_format.mFormatFlags |= kLinearPCMFormatFlagIsPacked;
/* Use hinted endianness */
if (audio->endianness_type == OSWRAPPER_AUDIO_ENDIANNESS_BIG) {
output_format.mFormatFlags |= kAudioFormatFlagIsBigEndian;
}
#if defined(__ppc64__) || defined(__ppc__)
else if (audio->endianness_type == OSWRAPPER_AUDIO_ENDIANNESS_USE_SYSTEM_DEFAULT) {
output_format.mFormatFlags |= kAudioFormatFlagIsBigEndian;
}
#endif
/* Use hinted sample rate */
output_format.mSampleRate = audio->sample_rate == 0 ? input_file_format.mSampleRate : audio->sample_rate;
/* Sanity check */
if (output_format.mSampleRate == 0) {
output_format.mSampleRate = 44100;
}
/* Use hinted bits per channel */
output_format.mBitsPerChannel = audio->bits_per_channel == 0 ? input_file_format.mBitsPerChannel : audio->bits_per_channel;
/* Get bits per channel for ALAC and FLAC files */
if ((output_format.mBitsPerChannel == 0) && (input_file_format.mFormatID == kAudioFormatAppleLossless || input_file_format.mFormatID == kAudioFormatFLAC)) {
switch (input_file_format.mFormatFlags) {
case kAppleLosslessFormatFlag_16BitSourceData:
output_format.mBitsPerChannel = 16;
break;
case kAppleLosslessFormatFlag_20BitSourceData:
output_format.mBitsPerChannel = 20;
break;
case kAppleLosslessFormatFlag_24BitSourceData:
output_format.mBitsPerChannel = 24;
break;
case kAppleLosslessFormatFlag_32BitSourceData:
output_format.mBitsPerChannel = 32;
break;
default:
break;
}
}
/* Sanity check */
if (output_format.mBitsPerChannel == 0) {
if (output_format.mFormatFlags & kLinearPCMFormatFlagIsFloat) {
output_format.mBitsPerChannel = 32;
} else {
output_format.mBitsPerChannel = 16;
}
}
/* Use hinted channels */
output_format.mChannelsPerFrame = audio->channel_count == 0 ? input_file_format.mChannelsPerFrame : audio->channel_count;
/* Sanity check */
if (output_format.mChannelsPerFrame == 0) {
output_format.mChannelsPerFrame = 2;
}
/* kAudioFormatLinearPCM doesn't use packets */
output_format.mFramesPerPacket = 1;
/* Bytes per channel * channels per frame */
output_format.mBytesPerFrame = (output_format.mBitsPerChannel / 8) * output_format.mChannelsPerFrame;
/* Bytes per frame * frames per packet */
output_format.mBytesPerPacket = output_format.mBytesPerFrame * output_format.mFramesPerPacket;
error = ExtAudioFileSetProperty(audio_file_ext, kExtAudioFileProperty_ClientDataFormat, sizeof(AudioStreamBasicDescription), &output_format);
if (!error) {
oswrapper_audio__internal_data_mac* internal_data = NULL;
if (input_file_format.mChannelsPerFrame == 1 && output_format.mChannelsPerFrame == 2) {
/* Try to set up appropriate channel mappings */
AudioConverterRef converter = NULL;
property_size = sizeof(AudioConverterRef);
if (!ExtAudioFileGetProperty(audio_file_ext, kExtAudioFileProperty_AudioConverter, &property_size, &converter) && converter != NULL) {
/* Output from input mono channel to both stereo channels */
SInt32 channel_map[2] = {0, 0};
/* Failure is mostly harmless */
AudioConverterSetProperty(converter, kAudioConverterChannelMap, sizeof(channel_map), channel_map);
CFArrayRef converter_config = NULL;
ExtAudioFileSetProperty(audio_file_ext, kExtAudioFileProperty_ConverterConfig, sizeof(CFArrayRef), &converter_config);
}
}
internal_data = (oswrapper_audio__internal_data_mac*) OSWRAPPER_AUDIO_MALLOC(sizeof(oswrapper_audio__internal_data_mac));
if (internal_data != NULL) {
audio->sample_rate = output_format.mSampleRate;
audio->bits_per_channel = output_format.mBitsPerChannel;
audio->channel_count = output_format.mChannelsPerFrame;
audio->audio_type = (output_format.mFormatFlags & kLinearPCMFormatFlagIsFloat) ? OSWRAPPER_AUDIO_FORMAT_PCM_FLOAT : OSWRAPPER_AUDIO_FORMAT_PCM_INTEGER;
audio->endianness_type = (output_format.mFormatFlags & kAudioFormatFlagIsBigEndian) ? OSWRAPPER_AUDIO_ENDIANNESS_BIG : OSWRAPPER_AUDIO_ENDIANNESS_LITTLE;
audio->internal_data = (void*) internal_data;
internal_data->audio_file = audio_file;
internal_data->audio_file_ext = audio_file_ext;
internal_data->callback_data = callback_data;
return OSWRAPPER_AUDIO_RESULT_SUCCESS;
}
}
}
ExtAudioFileDispose(audio_file_ext);
}
AudioFileClose(audio_file);
return OSWRAPPER_AUDIO_RESULT_FAILURE;
}
OSWRAPPER_AUDIO_DEF OSWRAPPER_AUDIO_RESULT_TYPE oswrapper_audio_load_from_memory(const unsigned char* data, size_t data_size, OSWrapper_audio_spec* audio) {
oswrapper_audio__callback_data_mac* callback_data = (oswrapper_audio__callback_data_mac*) OSWRAPPER_AUDIO_MALLOC(sizeof(oswrapper_audio__callback_data_mac));
if (callback_data != NULL) {
AudioFileID audio_file;
OSStatus error;
callback_data->data = data;
callback_data->data_size = data_size;
error = AudioFileOpenWithCallbacks((void*) callback_data, oswrapper_audio__audio_file_read_callback, NULL, oswrapper_audio__audio_file_get_size_callback, NULL, 0, &audio_file);
if (!error && oswrapper_audio__load_from_open(audio_file, callback_data, audio)) {
return OSWRAPPER_AUDIO_RESULT_SUCCESS;
}
OSWRAPPER_AUDIO_FREE(callback_data);
}
return OSWRAPPER_AUDIO_RESULT_FAILURE;
}
#ifndef OSWRAPPER_AUDIO_NO_LOAD_FROM_PATH
OSWRAPPER_AUDIO_DEF OSWRAPPER_AUDIO_RESULT_TYPE oswrapper_audio_load_from_path(const char* path, OSWrapper_audio_spec* audio) {
AudioFileID audio_file;
OSStatus error;
CFStringRef path_cfstr;
CFURLRef path_url;
#if !defined(MAC_OS_X_VERSION_10_5) || MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_5
FSRef path_fsref;
#endif
path_cfstr = CFStringCreateWithCString(kCFAllocatorDefault, path, kCFStringEncodingUTF8);
path_url = CFURLCreateWithFileSystemPath(NULL, path_cfstr, kCFURLPOSIXPathStyle, false);
#if !defined(MAC_OS_X_VERSION_10_5) || MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_5
CFURLGetFSRef(path_url, &path_fsref);
error = AudioFileOpen(&path_fsref, kAudioFileReadPermission, 0, &audio_file);
#else
error = AudioFileOpenURL(path_url, kAudioFileReadPermission, 0, &audio_file);
#endif
CFRelease(path_url);
CFRelease(path_cfstr);
if (!error && oswrapper_audio__load_from_open(audio_file, NULL, audio)) {
return OSWRAPPER_AUDIO_RESULT_SUCCESS;
}
return OSWRAPPER_AUDIO_RESULT_FAILURE;
}
#endif /* OSWRAPPER_AUDIO_NO_LOAD_FROM_PATH */
#ifdef OSWRAPPER_AUDIO_EXPERIMENTAL
/* Unstable-ish API */
OSWRAPPER_AUDIO_DEF OSWRAPPER_AUDIO_RESULT_TYPE oswrapper_audio_get_pos(OSWrapper_audio_spec* audio, OSWRAPPER_AUDIO_SEEK_TYPE* pos) {
OSStatus error;
oswrapper_audio__internal_data_mac* internal_data = (oswrapper_audio__internal_data_mac*) audio->internal_data;
error = ExtAudioFileTell(internal_data->audio_file_ext, pos);
return !error ? OSWRAPPER_AUDIO_RESULT_SUCCESS : OSWRAPPER_AUDIO_RESULT_FAILURE;
}
OSWRAPPER_AUDIO_DEF void oswrapper_audio_seek(OSWrapper_audio_spec* audio, OSWRAPPER_AUDIO_SEEK_TYPE pos) {
oswrapper_audio__internal_data_mac* internal_data = (oswrapper_audio__internal_data_mac*) audio->internal_data;
ExtAudioFileSeek(internal_data->audio_file_ext, pos);
}
#endif /* OSWRAPPER_AUDIO_EXPERIMENTAL */
OSWRAPPER_AUDIO_DEF void oswrapper_audio_rewind(OSWrapper_audio_spec* audio) {
oswrapper_audio__internal_data_mac* internal_data = (oswrapper_audio__internal_data_mac*) audio->internal_data;
ExtAudioFileSeek(internal_data->audio_file_ext, 0);
}
OSWRAPPER_AUDIO_DEF size_t oswrapper_audio_get_samples(OSWrapper_audio_spec* audio, short* buffer, size_t frames_to_do) {
AudioBufferList buffer_list;
UInt32 frames;
oswrapper_audio__internal_data_mac* internal_data = (oswrapper_audio__internal_data_mac*) audio->internal_data;
frames = frames_to_do;
buffer_list.mNumberBuffers = 1;
buffer_list.mBuffers[0].mNumberChannels = audio->channel_count;
buffer_list.mBuffers[0].mDataByteSize = frames_to_do * ((audio->bits_per_channel / 8) * audio->channel_count);
buffer_list.mBuffers[0].mData = buffer;
ExtAudioFileRead(internal_data->audio_file_ext, &frames, &buffer_list);
return frames;
}
/* End macOS AudioToolbox implementation */
#elif defined(OSWRAPPER_AUDIO_USE_WIN_MF_IMPL)
/* Start Win32 MF implementation */
#ifndef COBJMACROS
#define COBJMACROS
#endif
#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN
#endif
#include <windows.h>
#include <cguid.h>
#include <initguid.h>
#include <mfapi.h>
#include <mfidl.h>
#include <mfreadwrite.h>
#include <shlwapi.h>
#include <stdio.h>
/* Using CINTERFACE breaks some headers, so we have to define these ourselves */
#if defined(__cplusplus) && !defined(CINTERFACE) && !defined(OSWRAPPER_AUDIO_NO_DEFINE_WINMF_C_INTERFACE)
#ifndef IMFAttributes_GetGUID
#define IMFAttributes_GetGUID(attributes, ...) attributes->GetGUID(__VA_ARGS__)
#endif
#ifndef IMFByteStream_Release
#define IMFByteStream_Release(byte_stream) byte_stream->Release()
#endif
#ifndef IMFMediaBuffer_Lock
#define IMFMediaBuffer_Lock(media_buffer, ...) media_buffer->Lock(__VA_ARGS__)
#endif
#ifndef IMFMediaBuffer_Release
#define IMFMediaBuffer_Release(media_buffer) media_buffer->Release()
#endif
#ifndef IMFMediaBuffer_Unlock
#define IMFMediaBuffer_Unlock(media_buffer) media_buffer->Unlock()
#endif
#ifndef IMFMediaType_GetUINT32
#define IMFMediaType_GetUINT32(media_type, ...) media_type->GetUINT32(__VA_ARGS__)
#endif
#ifndef IMFMediaType_Release
#define IMFMediaType_Release(media_type) media_type->Release()
#endif
#ifndef IMFMediaType_SetGUID
#define IMFMediaType_SetGUID(media_type, ...) media_type->SetGUID(__VA_ARGS__)
#endif
#ifndef IMFMediaType_SetUINT32
#define IMFMediaType_SetUINT32(media_type, ...) media_type->SetUINT32(__VA_ARGS__)
#endif
#ifndef IMFSample_ConvertToContiguousBuffer
#define IMFSample_ConvertToContiguousBuffer(sample, ...) sample->ConvertToContiguousBuffer(__VA_ARGS__)
#endif
#ifndef IMFSample_Release
#define IMFSample_Release(sample) sample->Release()
#endif
#ifndef IMFSourceReader_GetNativeMediaType
#define IMFSourceReader_GetNativeMediaType(source_reader, ...) source_reader->GetNativeMediaType(__VA_ARGS__)
#endif
#ifndef IMFSourceReader_ReadSample
#define IMFSourceReader_ReadSample(source_reader, ...) source_reader->ReadSample(__VA_ARGS__)
#endif
#ifndef IMFSourceReader_Release
#define IMFSourceReader_Release(source_reader) source_reader->Release()
#endif
#ifndef IMFSourceReader_SetCurrentMediaType
#define IMFSourceReader_SetCurrentMediaType(source_reader, ...) source_reader->SetCurrentMediaType(__VA_ARGS__)
#endif
#ifndef IMFSourceReader_SetCurrentPosition
#define IMFSourceReader_SetCurrentPosition(source_reader, ...) source_reader->SetCurrentPosition(__VA_ARGS__)
#endif
#ifndef IMFSourceReader_SetStreamSelection
#define IMFSourceReader_SetStreamSelection(source_reader, ...) source_reader->SetStreamSelection(__VA_ARGS__)
#endif
#ifndef IStream_Release
#define IStream_Release(istream) istream->Release()
#endif
#endif
/* TODO Ugly hack */
#ifndef OSWRAPPER_AUDIO_PATH_MAX
#define OSWRAPPER_AUDIO_PATH_MAX MAX_PATH
#endif
#ifdef OSWRAPPER_AUDIO_MANAGE_COINIT
#include <objbase.h>
#ifndef OSWRAPPER_AUDIO_COINIT_VALUE
#define OSWRAPPER_AUDIO_COINIT_VALUE COINIT_MULTITHREADED
#endif
#endif
/* The startup flags forMFStartup */
#ifndef OSWRAPPER_AUDIO__MF_STARTUP_VAL
#define OSWRAPPER_AUDIO__MF_STARTUP_VAL MFSTARTUP_LITE
#endif
typedef struct oswrapper_audio__internal_data_win {
IMFSourceReader* reader;
IMFByteStream* byte_stream;
IStream* memory_stream;
short* internal_buffer;
/* Buffer size */
size_t internal_buffer_size;
/* Remaining samples */
size_t internal_buffer_remaining;
/* Current position */
size_t internal_buffer_pos;
/* Has the reader thrown an error? */
OSWRAPPER_AUDIO_RESULT_TYPE no_reader_error;
} oswrapper_audio__internal_data_win;
OSWRAPPER_AUDIO_DEF OSWRAPPER_AUDIO_RESULT_TYPE oswrapper_audio_init(void) {
#ifdef OSWRAPPER_AUDIO_MANAGE_COINIT
HRESULT result = CoInitializeEx(NULL, OSWRAPPER_AUDIO_COINIT_VALUE);
if (SUCCEEDED(result)) {
result = MFStartup(MF_VERSION, OSWRAPPER_AUDIO__MF_STARTUP_VAL);
if (SUCCEEDED(result)) {
return OSWRAPPER_AUDIO_RESULT_SUCCESS;
}
CoUninitialize();
}
return OSWRAPPER_AUDIO_RESULT_FAILURE;
#else
return SUCCEEDED(MFStartup(MF_VERSION, OSWRAPPER_AUDIO__MF_STARTUP_VAL)) ? OSWRAPPER_AUDIO_RESULT_SUCCESS : OSWRAPPER_AUDIO_RESULT_FAILURE;
#endif
}
OSWRAPPER_AUDIO_DEF OSWRAPPER_AUDIO_RESULT_TYPE oswrapper_audio_uninit(void) {
#ifdef OSWRAPPER_AUDIO_MANAGE_COINIT
if (FAILED(MFShutdown())) {
return OSWRAPPER_AUDIO_RESULT_FAILURE;
}
CoUninitialize();
return OSWRAPPER_AUDIO_RESULT_SUCCESS;
#else
return SUCCEEDED(MFShutdown()) ? OSWRAPPER_AUDIO_RESULT_SUCCESS : OSWRAPPER_AUDIO_RESULT_FAILURE;
#endif
}
OSWRAPPER_AUDIO_DEF OSWRAPPER_AUDIO_RESULT_TYPE oswrapper_audio_free_context(OSWrapper_audio_spec* audio) {
oswrapper_audio__internal_data_win* internal_data = (oswrapper_audio__internal_data_win*) audio->internal_data;
IMFSourceReader_Release(internal_data->reader);
/* Only expected for in-memory decoding */
if (internal_data->byte_stream != NULL) {
IMFByteStream_Release(internal_data->byte_stream);
}
/* Only expected for in-memory decoding */
if (internal_data->memory_stream != NULL) {
IStream_Release(internal_data->memory_stream);
}
if (internal_data->internal_buffer != NULL) {
OSWRAPPER_AUDIO_FREE(internal_data->internal_buffer);
}
OSWRAPPER_AUDIO_FREE(audio->internal_data);
return OSWRAPPER_AUDIO_RESULT_SUCCESS;
}
#define OSWRAPPER_AUDIO__END_FAIL_FALSE(cond) if(!cond) { return_val = OSWRAPPER_AUDIO_RESULT_FAILURE; goto cleanup; }
#define OSWRAPPER_AUDIO__END_FAIL(hres) OSWRAPPER_AUDIO__END_FAIL_FALSE(SUCCEEDED(hres))
static OSWRAPPER_AUDIO_RESULT_TYPE oswrapper_audio__configure_stream(IMFSourceReader* reader, OSWrapper_audio_spec* audio, OSWRAPPER_AUDIO_RESULT_TYPE initial_configure) {
OSWRAPPER_AUDIO_RESULT_TYPE return_val;
HRESULT result;
UINT32 sample_rate, channel_count, bits_per_channel;
GUID format_type;
IMFMediaType* media_type;
oswrapper_audio__internal_data_win* internal_data = (oswrapper_audio__internal_data_win*) audio->internal_data;
if ((initial_configure != OSWRAPPER_AUDIO_RESULT_SUCCESS) && (internal_data != NULL) && (internal_data->no_reader_error == OSWRAPPER_AUDIO_RESULT_FAILURE)) {
/* IMFSourceReader methods can no longer be called */
return OSWRAPPER_AUDIO_RESULT_FAILURE;
}
media_type = NULL;
result = S_OK;
return_val = OSWRAPPER_AUDIO_RESULT_SUCCESS;
channel_count = audio->channel_count;
sample_rate = audio->sample_rate;
bits_per_channel = audio->bits_per_channel;
if (audio->audio_type == OSWRAPPER_AUDIO_FORMAT_PCM_FLOAT) {
format_type = MFAudioFormat_Float;
} else if (audio->audio_type == OSWRAPPER_AUDIO_FORMAT_PCM_INTEGER) {
format_type = MFAudioFormat_PCM;
} else {
/* Fallback */
format_type = MFAudioFormat_PCM;
}
OSWRAPPER_AUDIO__END_FAIL(IMFSourceReader_SetStreamSelection(reader, (DWORD) MF_SOURCE_READER_ALL_STREAMS, FALSE));
OSWRAPPER_AUDIO__END_FAIL(IMFSourceReader_SetStreamSelection(reader, (DWORD) MF_SOURCE_READER_FIRST_AUDIO_STREAM, TRUE));
/* Get / set the format */
if ((sample_rate == 0) || (channel_count == 0) || (bits_per_channel == 0) || (audio->audio_type == OSWRAPPER_AUDIO_FORMAT_NOT_SET)) {
OSWRAPPER_AUDIO__END_FAIL(IMFSourceReader_GetNativeMediaType(reader, (DWORD) MF_SOURCE_READER_FIRST_AUDIO_STREAM, 0, &media_type));
if (channel_count == 0) {
#ifdef __cplusplus
IMFMediaType_GetUINT32(media_type, MF_MT_AUDIO_NUM_CHANNELS, &channel_count);
#else
IMFMediaType_GetUINT32(media_type, &MF_MT_AUDIO_NUM_CHANNELS, &channel_count);
#endif
/* Sanity check */
if (channel_count == 0) {
channel_count = 2;
}
audio->channel_count = channel_count;
}
if (sample_rate == 0) {
#ifdef __cplusplus
IMFMediaType_GetUINT32(media_type, MF_MT_AUDIO_SAMPLES_PER_SECOND, &sample_rate);
#else
IMFMediaType_GetUINT32(media_type, &MF_MT_AUDIO_SAMPLES_PER_SECOND, &sample_rate);
#endif
/* Sanity check */
if (sample_rate == 0) {
sample_rate = 44100;
}
audio->sample_rate = sample_rate;
}
if (audio->audio_type == OSWRAPPER_AUDIO_FORMAT_NOT_SET) {
#ifdef __cplusplus
IMFAttributes_GetGUID(media_type, MF_MT_SUBTYPE, &format_type);
#else
IMFAttributes_GetGUID(media_type, &MF_MT_SUBTYPE, &format_type);
#endif
/* Sanity check */
if (!OSWRAPPER_AUDIO_MEMCMP(&format_type, &MFAudioFormat_PCM, sizeof(GUID))) {
audio->audio_type = OSWRAPPER_AUDIO_FORMAT_PCM_INTEGER;
} else if (!OSWRAPPER_AUDIO_MEMCMP(&format_type, &MFAudioFormat_Float, sizeof(GUID))) {
audio->audio_type = OSWRAPPER_AUDIO_FORMAT_PCM_FLOAT;
} else {
/* Fallback */
format_type = MFAudioFormat_PCM;
audio->audio_type = OSWRAPPER_AUDIO_FORMAT_PCM_INTEGER;
}
}
if (bits_per_channel == 0) {
#ifdef __cplusplus
IMFMediaType_GetUINT32(media_type, MF_MT_AUDIO_BITS_PER_SAMPLE, &bits_per_channel);
#else
IMFMediaType_GetUINT32(media_type, &MF_MT_AUDIO_BITS_PER_SAMPLE, &bits_per_channel);
#endif
/* Sanity check */
if (bits_per_channel == 0) {
if (audio->audio_type == OSWRAPPER_AUDIO_FORMAT_PCM_FLOAT) {
bits_per_channel = 32;
} else {
bits_per_channel = 16;
}
}
audio->bits_per_channel = bits_per_channel;
}
IMFMediaType_Release(media_type);
}
OSWRAPPER_AUDIO__END_FAIL(MFCreateMediaType(&media_type));
#ifdef __cplusplus
OSWRAPPER_AUDIO__END_FAIL(IMFMediaType_SetGUID(media_type, MF_MT_MAJOR_TYPE, MFMediaType_Audio));
OSWRAPPER_AUDIO__END_FAIL(IMFMediaType_SetGUID(media_type, MF_MT_SUBTYPE, format_type));
OSWRAPPER_AUDIO__END_FAIL(IMFMediaType_SetUINT32(media_type, MF_MT_AUDIO_BITS_PER_SAMPLE, audio->bits_per_channel));
OSWRAPPER_AUDIO__END_FAIL(IMFMediaType_SetUINT32(media_type, MF_MT_AUDIO_SAMPLES_PER_SECOND, audio->sample_rate));
OSWRAPPER_AUDIO__END_FAIL(IMFMediaType_SetUINT32(media_type, MF_MT_AUDIO_NUM_CHANNELS, audio->channel_count));
#else
OSWRAPPER_AUDIO__END_FAIL(IMFMediaType_SetGUID(media_type, &MF_MT_MAJOR_TYPE, &MFMediaType_Audio));
OSWRAPPER_AUDIO__END_FAIL(IMFMediaType_SetGUID(media_type, &MF_MT_SUBTYPE, &format_type));
OSWRAPPER_AUDIO__END_FAIL(IMFMediaType_SetUINT32(media_type, &MF_MT_AUDIO_BITS_PER_SAMPLE, audio->bits_per_channel));
OSWRAPPER_AUDIO__END_FAIL(IMFMediaType_SetUINT32(media_type, &MF_MT_AUDIO_SAMPLES_PER_SECOND, audio->sample_rate));
OSWRAPPER_AUDIO__END_FAIL(IMFMediaType_SetUINT32(media_type, &MF_MT_AUDIO_NUM_CHANNELS, audio->channel_count));
#endif
OSWRAPPER_AUDIO__END_FAIL(IMFSourceReader_SetCurrentMediaType(reader, (DWORD) MF_SOURCE_READER_FIRST_AUDIO_STREAM, NULL, media_type));
OSWRAPPER_AUDIO__END_FAIL(IMFSourceReader_SetStreamSelection(reader, (DWORD) MF_SOURCE_READER_FIRST_AUDIO_STREAM, TRUE));
cleanup:
if (media_type != NULL) {
IMFMediaType_Release(media_type);
}
return return_val;
}
OSWRAPPER_AUDIO_DEF OSWRAPPER_AUDIO_RESULT_TYPE oswrapper_audio__load_from_reader(IMFSourceReader* reader, IMFByteStream* byte_stream, IStream* memory_stream, OSWrapper_audio_spec* audio) {
if (oswrapper_audio__configure_stream(reader, audio, OSWRAPPER_AUDIO_RESULT_SUCCESS)) {
oswrapper_audio__internal_data_win* internal_data = (oswrapper_audio__internal_data_win*) OSWRAPPER_AUDIO_MALLOC(sizeof(oswrapper_audio__internal_data_win));
if (internal_data != NULL) {
audio->endianness_type = OSWRAPPER_AUDIO_ENDIANNESS_LITTLE;
audio->internal_data = (void*) internal_data;
internal_data->reader = reader;
internal_data->byte_stream = byte_stream;
internal_data->memory_stream = memory_stream;
internal_data->internal_buffer = NULL;
internal_data->internal_buffer_pos = 0;
internal_data->internal_buffer_remaining = 0;
internal_data->internal_buffer_size = 0;
internal_data->no_reader_error = OSWRAPPER_AUDIO_RESULT_SUCCESS;
return OSWRAPPER_AUDIO_RESULT_SUCCESS;
}
}
IMFSourceReader_Release(reader);
/* Only expected for in-memory decoding */
if (byte_stream != NULL) {
IMFByteStream_Release(byte_stream);
}
/* Only expected for in-memory decoding */
if (memory_stream != NULL) {
IStream_Release(memory_stream);
}
return OSWRAPPER_AUDIO_RESULT_FAILURE;
}
OSWRAPPER_AUDIO_DEF OSWRAPPER_AUDIO_RESULT_TYPE oswrapper_audio_load_from_memory(const unsigned char* data, size_t data_size, OSWrapper_audio_spec* audio) {
IStream* memory_stream = SHCreateMemStream(data, (UINT) data_size);
if (memory_stream != NULL) {
HRESULT result;
IMFByteStream* byte_stream = NULL;
result = MFCreateMFByteStreamOnStream(memory_stream, &byte_stream);
if (SUCCEEDED(result)) {
IMFSourceReader* reader = NULL;
result = MFCreateSourceReaderFromByteStream(byte_stream, NULL, &reader);
if (SUCCEEDED(result)) {
return oswrapper_audio__load_from_reader(reader, byte_stream, memory_stream, audio);
}
IMFByteStream_Release(byte_stream);
}
IStream_Release(memory_stream);
}
return OSWRAPPER_AUDIO_RESULT_FAILURE;
}
#ifndef OSWRAPPER_AUDIO_NO_LOAD_FROM_PATH
OSWRAPPER_AUDIO_DEF OSWRAPPER_AUDIO_RESULT_TYPE oswrapper_audio_load_from_path(const char* path, OSWrapper_audio_spec* audio) {
HRESULT result;
/* TODO Ugly hack */
wchar_t path_buffer[OSWRAPPER_AUDIO_PATH_MAX];
result = MultiByteToWideChar(CP_UTF8, 0, path, -1, path_buffer, OSWRAPPER_AUDIO_PATH_MAX);
if (SUCCEEDED(result)) {
IMFSourceReader* reader = NULL;
result = MFCreateSourceReaderFromURL(path_buffer, NULL, &reader);
if (SUCCEEDED(result)) {
return oswrapper_audio__load_from_reader(reader, NULL, NULL, audio);
}
}
return OSWRAPPER_AUDIO_RESULT_FAILURE;
}
#endif /* OSWRAPPER_AUDIO_NO_LOAD_FROM_PATH */
#ifdef OSWRAPPER_AUDIO_EXPERIMENTAL
/* Unstable-ish API */
OSWRAPPER_AUDIO_DEF OSWRAPPER_AUDIO_RESULT_TYPE oswrapper_audio_get_pos(OSWrapper_audio_spec* audio, OSWRAPPER_AUDIO_SEEK_TYPE* pos) {
/* TODO Unimplemented
oswrapper_audio__internal_data_win* internal_data = (oswrapper_audio__internal_data_win*) audio->internal_data;
if (internal_data->no_reader_error == OSWRAPPER_AUDIO_RESULT_FAILURE) {
/ * IMFSourceReader methods can no longer be called * /
return OSWRAPPER_AUDIO_RESULT_FAILURE;
}
*/
return OSWRAPPER_AUDIO_RESULT_FAILURE;
}
OSWRAPPER_AUDIO_DEF void oswrapper_audio_seek(OSWrapper_audio_spec* audio, OSWRAPPER_AUDIO_SEEK_TYPE pos) {
oswrapper_audio__internal_data_win* internal_data;
HRESULT result;
PROPVARIANT pos_propvariant = { 0 };
internal_data = (oswrapper_audio__internal_data_win*) audio->internal_data;
if (internal_data->no_reader_error == OSWRAPPER_AUDIO_RESULT_FAILURE) {
/* IMFSourceReader methods can no longer be called */
return;
}
result = S_OK;
pos_propvariant.vt = VT_I8;
pos_propvariant.hVal.QuadPart = pos;
#ifdef __cplusplus
IMFSourceReader_SetCurrentPosition(internal_data->reader, GUID_NULL, pos_propvariant);
#else
IMFSourceReader_SetCurrentPosition(internal_data->reader, &GUID_NULL, &pos_propvariant);
#endif
PropVariantClear(&pos_propvariant);
/* Reset buffer positions */
internal_data->internal_buffer_remaining = 0;
internal_data->internal_buffer_pos = 0;
}
#endif /* OSWRAPPER_AUDIO_EXPERIMENTAL */
OSWRAPPER_AUDIO_DEF void oswrapper_audio_rewind(OSWrapper_audio_spec* audio) {
oswrapper_audio__internal_data_win* internal_data;
HRESULT result;
PROPVARIANT pos_propvariant = { 0 };
internal_data = (oswrapper_audio__internal_data_win*) audio->internal_data;
if (internal_data->no_reader_error == OSWRAPPER_AUDIO_RESULT_FAILURE) {
/* IMFSourceReader methods can no longer be called */
return;
}
result = S_OK;
pos_propvariant.vt = VT_I8;
pos_propvariant.hVal.QuadPart = 0;
#ifdef __cplusplus
IMFSourceReader_SetCurrentPosition(internal_data->reader, GUID_NULL, pos_propvariant);
#else
IMFSourceReader_SetCurrentPosition(internal_data->reader, &GUID_NULL, &pos_propvariant);
#endif
PropVariantClear(&pos_propvariant);
/* Reset buffer positions */
internal_data->internal_buffer_remaining = 0;
internal_data->internal_buffer_pos = 0;
}
OSWRAPPER_AUDIO_DEF size_t oswrapper_audio_get_samples(OSWrapper_audio_spec* audio, short* buffer, size_t frames_to_do) {
size_t frame_size;
size_t frames_done;
oswrapper_audio__internal_data_win* internal_data = (oswrapper_audio__internal_data_win*) audio->internal_data;
frame_size = (audio->bits_per_channel / 8) * audio->channel_count;
frames_to_do = frames_to_do * frame_size / sizeof(short);
frames_done = 0;
/* Copy any previous excess frames from the internal buffer */
if (internal_data->internal_buffer_remaining > 0) {
size_t copied_sample_data_size = internal_data->internal_buffer_remaining < frames_to_do ? internal_data->internal_buffer_remaining : frames_to_do;
OSWRAPPER_AUDIO_MEMCPY(buffer, internal_data->internal_buffer + internal_data->internal_buffer_pos, copied_sample_data_size * (sizeof internal_data->internal_buffer[0]));
internal_data->internal_buffer_remaining -= copied_sample_data_size;
internal_data->internal_buffer_pos += copied_sample_data_size;
frames_done = copied_sample_data_size;
}
/* Get new samples */
while (frames_to_do > frames_done) {
size_t new_target_frames = 0;
/* Check if IMFSourceReader methods can still be called */
if (internal_data->no_reader_error == OSWRAPPER_AUDIO_RESULT_SUCCESS) {
IMFSample* sample;
DWORD flags;