-
Notifications
You must be signed in to change notification settings - Fork 280
/
pa_win_wasapi.c
6336 lines (5350 loc) · 209 KB
/
pa_win_wasapi.c
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
/*
* Portable Audio I/O Library WASAPI implementation
* Copyright (c) 2006-2010 David Viens
* Copyright (c) 2010-2019 Dmitry Kostjuchenko
*
* Based on the Open Source API proposed by Ross Bencina
* Copyright (c) 1999-2019 Ross Bencina, Phil Burk
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/*
* The text above constitutes the entire PortAudio license; however,
* the PortAudio community also makes the following non-binding requests:
*
* Any person wishing to distribute modifications to the Software is
* requested to send the modifications to the original developer so that
* they can be incorporated into the canonical version. It is also
* requested that these non-binding requests be included along with the
* license above.
*/
/** @file
@ingroup hostapi_src
@brief WASAPI implementation of support for a host API.
@note pa_wasapi currently requires minimum VC 2005, and the latest Vista SDK
*/
#include <windows.h>
#include <stdio.h>
#include <process.h>
#include <assert.h>
// Max device count (if defined) causes max constant device count in the device list that
// enables PaWasapi_UpdateDeviceList() API and makes it possible to update WASAPI list dynamically
#ifndef PA_WASAPI_MAX_CONST_DEVICE_COUNT
#define PA_WASAPI_MAX_CONST_DEVICE_COUNT 0 // Force basic behavior by defining 0 if not defined by user
#endif
// Fallback from Event to the Polling method in case if latency is higher than 21.33ms, as it allows to use
// 100% of CPU inside the PA's callback.
// Note: Some USB DAC drivers are buggy when Polling method is forced in Exclusive mode, audio output becomes
// unstable with a lot of interruptions, therefore this define is optional. The default behavior is to
// not change the Event mode to Polling and use the mode which user provided.
//#define PA_WASAPI_FORCE_POLL_IF_LARGE_BUFFER
//! Poll mode time slots logging.
//#define PA_WASAPI_LOG_TIME_SLOTS
// WinRT
#if defined(WINAPI_FAMILY) && (WINAPI_FAMILY == WINAPI_FAMILY_APP)
#define PA_WINRT
#define INITGUID
#endif
// WASAPI
// using adjustments for MinGW build from @mgeier/MXE
// https://github.com/mxe/mxe/commit/f4bbc45682f021948bdaefd9fd476e2a04c4740f
#include <mmreg.h> // must be before other Wasapi headers
#if defined(_MSC_VER) && (_MSC_VER >= 1400) || defined(__MINGW64_VERSION_MAJOR)
#include <avrt.h>
#define COBJMACROS
#include <audioclient.h>
#include <endpointvolume.h>
#define INITGUID // Avoid additional linkage of static libs, excessive code will be optimized out by the compiler
#ifndef _MSC_VER
#include <functiondiscoverykeys_devpkey.h>
#endif
#include <functiondiscoverykeys.h>
#include <mmdeviceapi.h>
#include <devicetopology.h> // Used to get IKsJackDescription interface
#undef INITGUID
#endif
#ifndef __MWERKS__
#include <malloc.h>
#include <memory.h>
#endif
#include "pa_util.h"
#include "pa_allocation.h"
#include "pa_hostapi.h"
#include "pa_stream.h"
#include "pa_cpuload.h"
#include "pa_process.h"
#include "pa_win_wasapi.h"
#include "pa_debugprint.h"
#include "pa_ringbuffer.h"
#include "pa_win_coinitialize.h"
#if !defined(NTDDI_VERSION)
#undef WINVER
#undef _WIN32_WINNT
#define WINVER 0x0600 // VISTA
#define _WIN32_WINNT WINVER
#ifndef _AVRT_ //<< fix MinGW dummy compile by defining missing type: AVRT_PRIORITY
typedef enum _AVRT_PRIORITY
{
AVRT_PRIORITY_LOW = -1,
AVRT_PRIORITY_NORMAL,
AVRT_PRIORITY_HIGH,
AVRT_PRIORITY_CRITICAL
} AVRT_PRIORITY, *PAVRT_PRIORITY;
#endif
#include <basetyps.h> // << for IID/CLSID
#include <rpcsal.h>
#include <sal.h>
#ifndef __LPCGUID_DEFINED__
#define __LPCGUID_DEFINED__
typedef const GUID *LPCGUID;
#endif
#ifndef PROPERTYKEY_DEFINED
#define PROPERTYKEY_DEFINED
typedef struct _tagpropertykey
{
GUID fmtid;
DWORD pid;
} PROPERTYKEY;
#endif
#ifdef __midl_proxy
#define __MIDL_CONST
#else
#define __MIDL_CONST const
#endif
#ifdef WIN64
#include <wtypes.h>
typedef LONG NTSTATUS;
#define FASTCALL
#include <oleidl.h>
#include <objidl.h>
#else
typedef struct _BYTE_BLOB
{
unsigned long clSize;
unsigned char abData[ 1 ];
} BYTE_BLOB;
typedef /* [unique] */ __RPC_unique_pointer BYTE_BLOB *UP_BYTE_BLOB;
typedef LONGLONG REFERENCE_TIME;
#define NONAMELESSUNION
#endif
#ifndef WAVE_FORMAT_IEEE_FLOAT
#define WAVE_FORMAT_IEEE_FLOAT 0x0003 // 32-bit floating-point
#endif
#ifndef __MINGW_EXTENSION
#if defined(__GNUC__) || defined(__GNUG__)
#define __MINGW_EXTENSION __extension__
#else
#define __MINGW_EXTENSION
#endif
#endif
#include <sdkddkver.h>
#include <propkeydef.h>
#define COBJMACROS
#define INITGUID // Avoid additional linkage of static libs, excessive code will be optimized out by the compiler
#include <audioclient.h>
#include <mmdeviceapi.h>
#include <endpointvolume.h>
#include <functiondiscoverykeys.h>
#include <devicetopology.h> // Used to get IKsJackDescription interface
#undef INITGUID
#endif // NTDDI_VERSION
// Missing declarations for WinRT
#ifdef PA_WINRT
#define DEVICE_STATE_ACTIVE 0x00000001
typedef enum _EDataFlow
{
eRender = 0,
eCapture = ( eRender + 1 ) ,
eAll = ( eCapture + 1 ) ,
EDataFlow_enum_count = ( eAll + 1 )
}
EDataFlow;
typedef enum _EndpointFormFactor
{
RemoteNetworkDevice = 0,
Speakers = ( RemoteNetworkDevice + 1 ) ,
LineLevel = ( Speakers + 1 ) ,
Headphones = ( LineLevel + 1 ) ,
Microphone = ( Headphones + 1 ) ,
Headset = ( Microphone + 1 ) ,
Handset = ( Headset + 1 ) ,
UnknownDigitalPassthrough = ( Handset + 1 ) ,
SPDIF = ( UnknownDigitalPassthrough + 1 ) ,
HDMI = ( SPDIF + 1 ) ,
UnknownFormFactor = ( HDMI + 1 )
}
EndpointFormFactor;
#endif
#ifndef GUID_SECT
#define GUID_SECT
#endif
#define __DEFINE_GUID(n,l,w1,w2,b1,b2,b3,b4,b5,b6,b7,b8) static const GUID n GUID_SECT = {l,w1,w2,{b1,b2,b3,b4,b5,b6,b7,b8}}
#define __DEFINE_IID(n,l,w1,w2,b1,b2,b3,b4,b5,b6,b7,b8) static const IID n GUID_SECT = {l,w1,w2,{b1,b2,b3,b4,b5,b6,b7,b8}}
#define __DEFINE_CLSID(n,l,w1,w2,b1,b2,b3,b4,b5,b6,b7,b8) static const CLSID n GUID_SECT = {l,w1,w2,{b1,b2,b3,b4,b5,b6,b7,b8}}
#define PA_DEFINE_CLSID(className, l, w1, w2, b1, b2, b3, b4, b5, b6, b7, b8) \
__DEFINE_CLSID(pa_CLSID_##className, 0x##l, 0x##w1, 0x##w2, 0x##b1, 0x##b2, 0x##b3, 0x##b4, 0x##b5, 0x##b6, 0x##b7, 0x##b8)
#define PA_DEFINE_IID(interfaceName, l, w1, w2, b1, b2, b3, b4, b5, b6, b7, b8) \
__DEFINE_IID(pa_IID_##interfaceName, 0x##l, 0x##w1, 0x##w2, 0x##b1, 0x##b2, 0x##b3, 0x##b4, 0x##b5, 0x##b6, 0x##b7, 0x##b8)
// "1CB9AD4C-DBFA-4c32-B178-C2F568A703B2"
PA_DEFINE_IID(IAudioClient, 1cb9ad4c, dbfa, 4c32, b1, 78, c2, f5, 68, a7, 03, b2);
// "726778CD-F60A-4EDA-82DE-E47610CD78AA"
PA_DEFINE_IID(IAudioClient2, 726778cd, f60a, 4eda, 82, de, e4, 76, 10, cd, 78, aa);
// "7ED4EE07-8E67-4CD4-8C1A-2B7A5987AD42"
PA_DEFINE_IID(IAudioClient3, 7ed4ee07, 8e67, 4cd4, 8c, 1a, 2b, 7a, 59, 87, ad, 42);
// "1BE09788-6894-4089-8586-9A2A6C265AC5"
PA_DEFINE_IID(IMMEndpoint, 1be09788, 6894, 4089, 85, 86, 9a, 2a, 6c, 26, 5a, c5);
// "A95664D2-9614-4F35-A746-DE8DB63617E6"
PA_DEFINE_IID(IMMDeviceEnumerator, a95664d2, 9614, 4f35, a7, 46, de, 8d, b6, 36, 17, e6);
// "BCDE0395-E52F-467C-8E3D-C4579291692E"
PA_DEFINE_CLSID(IMMDeviceEnumerator,bcde0395, e52f, 467c, 8e, 3d, c4, 57, 92, 91, 69, 2e);
// "F294ACFC-3146-4483-A7BF-ADDCA7C260E2"
PA_DEFINE_IID(IAudioRenderClient, f294acfc, 3146, 4483, a7, bf, ad, dc, a7, c2, 60, e2);
// "C8ADBD64-E71E-48a0-A4DE-185C395CD317"
PA_DEFINE_IID(IAudioCaptureClient, c8adbd64, e71e, 48a0, a4, de, 18, 5c, 39, 5c, d3, 17);
// *2A07407E-6497-4A18-9787-32F79BD0D98F* Or this??
PA_DEFINE_IID(IDeviceTopology, 2A07407E, 6497, 4A18, 97, 87, 32, f7, 9b, d0, d9, 8f);
// *AE2DE0E4-5BCA-4F2D-AA46-5D13F8FDB3A9*
PA_DEFINE_IID(IPart, AE2DE0E4, 5BCA, 4F2D, aa, 46, 5d, 13, f8, fd, b3, a9);
// *4509F757-2D46-4637-8E62-CE7DB944F57B*
PA_DEFINE_IID(IKsJackDescription, 4509F757, 2D46, 4637, 8e, 62, ce, 7d, b9, 44, f5, 7b);
// Media formats:
__DEFINE_GUID(pa_KSDATAFORMAT_SUBTYPE_PCM, 0x00000001, 0x0000, 0x0010, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 );
__DEFINE_GUID(pa_KSDATAFORMAT_SUBTYPE_ADPCM, 0x00000002, 0x0000, 0x0010, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 );
__DEFINE_GUID(pa_KSDATAFORMAT_SUBTYPE_IEEE_FLOAT, 0x00000003, 0x0000, 0x0010, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 );
#ifdef __IAudioClient2_INTERFACE_DEFINED__
typedef enum _pa_AUDCLNT_STREAMOPTIONS {
pa_AUDCLNT_STREAMOPTIONS_NONE = 0x00,
pa_AUDCLNT_STREAMOPTIONS_RAW = 0x01,
pa_AUDCLNT_STREAMOPTIONS_MATCH_FORMAT = 0x02
} pa_AUDCLNT_STREAMOPTIONS;
typedef struct _pa_AudioClientProperties {
UINT32 cbSize;
BOOL bIsOffload;
AUDIO_STREAM_CATEGORY eCategory;
pa_AUDCLNT_STREAMOPTIONS Options;
} pa_AudioClientProperties;
#define PA_AUDIOCLIENTPROPERTIES_SIZE_CATEGORY (sizeof(pa_AudioClientProperties) - sizeof(pa_AUDCLNT_STREAMOPTIONS))
#define PA_AUDIOCLIENTPROPERTIES_SIZE_OPTIONS sizeof(pa_AudioClientProperties)
#endif // __IAudioClient2_INTERFACE_DEFINED__
/* use CreateThread for CYGWIN/Windows Mobile, _beginthreadex for all others */
#if !defined(__CYGWIN__) && !defined(_WIN32_WCE)
#define CREATE_THREAD(PROC) (HANDLE)_beginthreadex( NULL, 0, (PROC), stream, 0, &stream->dwThreadId )
#define PA_THREAD_FUNC static unsigned WINAPI
#define PA_THREAD_ID unsigned
#else
#define CREATE_THREAD(PROC) CreateThread( NULL, 0, (PROC), stream, 0, &stream->dwThreadId )
#define PA_THREAD_FUNC static DWORD WINAPI
#define PA_THREAD_ID DWORD
#endif
// Thread function forward decl.
PA_THREAD_FUNC ProcThreadEvent(void *param);
PA_THREAD_FUNC ProcThreadPoll(void *param);
// Error codes (availabe since Windows 7)
#ifndef AUDCLNT_E_BUFFER_ERROR
#define AUDCLNT_E_BUFFER_ERROR AUDCLNT_ERR(0x018)
#endif
#ifndef AUDCLNT_E_BUFFER_SIZE_NOT_ALIGNED
#define AUDCLNT_E_BUFFER_SIZE_NOT_ALIGNED AUDCLNT_ERR(0x019)
#endif
#ifndef AUDCLNT_E_INVALID_DEVICE_PERIOD
#define AUDCLNT_E_INVALID_DEVICE_PERIOD AUDCLNT_ERR(0x020)
#endif
// Stream flags (availabe since Windows 7)
#ifndef AUDCLNT_STREAMFLAGS_SRC_DEFAULT_QUALITY
#define AUDCLNT_STREAMFLAGS_SRC_DEFAULT_QUALITY 0x08000000
#endif
#ifndef AUDCLNT_STREAMFLAGS_AUTOCONVERTPCM
#define AUDCLNT_STREAMFLAGS_AUTOCONVERTPCM 0x80000000
#endif
#define MAX_STR_LEN 512
#ifdef PA_WINRT
#define PA_WASAPI_DEVICE_ID_LEN 4096
#endif
enum { S_INPUT = 0, S_OUTPUT = 1, S_COUNT = 2, S_FULLDUPLEX = 0 };
// Number of packets which compose single contignous buffer. With trial and error it was calculated
// that WASAPI Input sub-system uses 6 packets per whole buffer. Please provide more information
// or corrections if available.
enum { WASAPI_PACKETS_PER_INPUT_BUFFER = 6 };
#define STATIC_ARRAY_SIZE(array) (sizeof(array)/sizeof(array[0]))
#define PRINT(x) PA_DEBUG(x);
#define PA_SKELETON_SET_LAST_HOST_ERROR( errorCode, errorText ) \
PaUtil_SetLastHostErrorInfo( paWASAPI, errorCode, errorText )
#define PA_WASAPI__IS_FULLDUPLEX(STREAM) ((STREAM)->in.clientProc && (STREAM)->out.clientProc)
#ifndef IF_FAILED_JUMP
#define IF_FAILED_JUMP(hr, label) if(FAILED(hr)) goto label;
#endif
#ifndef IF_FAILED_INTERNAL_ERROR_JUMP
#define IF_FAILED_INTERNAL_ERROR_JUMP(hr, error, label) if(FAILED(hr)) { error = paInternalError; goto label; }
#endif
#define SAFE_CLOSE(h) if ((h) != NULL) { CloseHandle((h)); (h) = NULL; }
#define SAFE_RELEASE(punk) if ((punk) != NULL) { (punk)->lpVtbl->Release((punk)); (punk) = NULL; }
// Mixer function
typedef void (*MixMonoToStereoF) (void *__to, const void *__from, UINT32 count);
// AVRT is the new "multimedia schedulling stuff"
#ifndef PA_WINRT
typedef BOOL (WINAPI *FAvRtCreateThreadOrderingGroup) (PHANDLE,PLARGE_INTEGER,GUID*,PLARGE_INTEGER);
typedef BOOL (WINAPI *FAvRtDeleteThreadOrderingGroup) (HANDLE);
typedef BOOL (WINAPI *FAvRtWaitOnThreadOrderingGroup) (HANDLE);
typedef HANDLE (WINAPI *FAvSetMmThreadCharacteristics) (LPCSTR,LPDWORD);
typedef BOOL (WINAPI *FAvRevertMmThreadCharacteristics)(HANDLE);
typedef BOOL (WINAPI *FAvSetMmThreadPriority) (HANDLE,AVRT_PRIORITY);
static HMODULE hDInputDLL = 0;
FAvRtCreateThreadOrderingGroup pAvRtCreateThreadOrderingGroup = NULL;
FAvRtDeleteThreadOrderingGroup pAvRtDeleteThreadOrderingGroup = NULL;
FAvRtWaitOnThreadOrderingGroup pAvRtWaitOnThreadOrderingGroup = NULL;
FAvSetMmThreadCharacteristics pAvSetMmThreadCharacteristics = NULL;
FAvRevertMmThreadCharacteristics pAvRevertMmThreadCharacteristics = NULL;
FAvSetMmThreadPriority pAvSetMmThreadPriority = NULL;
#endif
#define _GetProc(fun, type, name) { \
fun = (type) GetProcAddress(hDInputDLL,name); \
if (fun == NULL) { \
PRINT(("GetProcAddr failed for %s" ,name)); \
return FALSE; \
} \
} \
// ------------------------------------------------------------------------------------------
/* prototypes for functions declared in this file */
#ifdef __cplusplus
extern "C"
{
#endif /* __cplusplus */
PaError PaWasapi_Initialize( PaUtilHostApiRepresentation **hostApi, PaHostApiIndex index );
#ifdef __cplusplus
}
#endif /* __cplusplus */
// dummy entry point for other compilers and sdks
// currently built using RC1 SDK (5600)
//#if _MSC_VER < 1400
//PaError PaWasapi_Initialize( PaUtilHostApiRepresentation **hostApi, PaHostApiIndex hostApiIndex )
//{
//return paNoError;
//}
//#else
// ------------------------------------------------------------------------------------------
static void Terminate( struct PaUtilHostApiRepresentation *hostApi );
static PaError IsFormatSupported( struct PaUtilHostApiRepresentation *hostApi,
const PaStreamParameters *inputParameters,
const PaStreamParameters *outputParameters,
double sampleRate );
static PaError OpenStream( struct PaUtilHostApiRepresentation *hostApi,
PaStream** s,
const PaStreamParameters *inputParameters,
const PaStreamParameters *outputParameters,
double sampleRate,
unsigned long framesPerBuffer,
PaStreamFlags streamFlags,
PaStreamCallback *streamCallback,
void *userData );
static PaError CloseStream( PaStream* stream );
static PaError StartStream( PaStream *stream );
static PaError StopStream( PaStream *stream );
static PaError AbortStream( PaStream *stream );
static PaError IsStreamStopped( PaStream *s );
static PaError IsStreamActive( PaStream *stream );
static PaTime GetStreamTime( PaStream *stream );
static double GetStreamCpuLoad( PaStream* stream );
static PaError ReadStream( PaStream* stream, void *buffer, unsigned long frames );
static PaError WriteStream( PaStream* stream, const void *buffer, unsigned long frames );
static signed long GetStreamReadAvailable( PaStream* stream );
static signed long GetStreamWriteAvailable( PaStream* stream );
// ------------------------------------------------------------------------------------------
/*
These are fields that can be gathered from IDevice and IAudioDevice PRIOR to Initialize, and
done in first pass i assume that neither of these will cause the Driver to "load", but again,
who knows how they implement their stuff
*/
typedef struct PaWasapiDeviceInfo
{
// Device
#ifndef PA_WINRT
IMMDevice *device;
#endif
// from GetId
WCHAR szDeviceID[MAX_STR_LEN];
// from GetState
DWORD state;
// Fields filled from IAudioDevice (_prior_ to Initialize)
// from GetDevicePeriod(
REFERENCE_TIME DefaultDevicePeriod;
REFERENCE_TIME MinimumDevicePeriod;
// Default format (setup through Control Panel by user)
WAVEFORMATEXTENSIBLE DefaultFormat;
// Mix format (internal format used by WASAPI audio engine)
WAVEFORMATEXTENSIBLE MixFormat;
// Fields filled from IMMEndpoint'sGetDataFlow
EDataFlow flow;
// Formfactor
EndpointFormFactor formFactor;
}
PaWasapiDeviceInfo;
// ------------------------------------------------------------------------------------------
/* PaWasapiHostApiRepresentation - host api datastructure specific to this implementation */
typedef struct
{
PaUtilHostApiRepresentation inheritedHostApiRep;
PaUtilStreamInterface callbackStreamInterface;
PaUtilStreamInterface blockingStreamInterface;
PaUtilAllocationGroup *allocations;
/* implementation specific data goes here */
PaWinUtilComInitializationResult comInitializationResult;
// this is the REAL number of devices, whether they are usefull to PA or not!
UINT32 deviceCount;
WCHAR defaultRenderer[MAX_STR_LEN];
WCHAR defaultCapturer[MAX_STR_LEN];
PaWasapiDeviceInfo *devInfo;
// is TRUE when WOW64 Vista/7 Workaround is needed
BOOL useWOW64Workaround;
}
PaWasapiHostApiRepresentation;
// ------------------------------------------------------------------------------------------
/* PaWasapiAudioClientParams - audio client parameters */
typedef struct PaWasapiAudioClientParams
{
PaWasapiDeviceInfo *device_info;
PaStreamParameters stream_params;
PaWasapiStreamInfo wasapi_params;
UINT32 frames_per_buffer;
double sample_rate;
BOOL blocking;
BOOL full_duplex;
BOOL wow64_workaround;
}
PaWasapiAudioClientParams;
// ------------------------------------------------------------------------------------------
/* PaWasapiStream - a stream data structure specifically for this implementation */
typedef struct PaWasapiSubStream
{
IAudioClient *clientParent;
#ifndef PA_WINRT
IStream *clientStream;
#endif
IAudioClient *clientProc;
WAVEFORMATEXTENSIBLE wavex;
UINT32 bufferSize;
REFERENCE_TIME deviceLatency;
REFERENCE_TIME period;
double latencySeconds;
UINT32 framesPerHostCallback;
AUDCLNT_SHAREMODE shareMode;
UINT32 streamFlags; // AUDCLNT_STREAMFLAGS_EVENTCALLBACK, ...
UINT32 flags;
PaWasapiAudioClientParams params; //!< parameters
// Buffers
UINT32 buffers; //!< number of buffers used (from host side)
UINT32 framesPerBuffer; //!< number of frames per 1 buffer
BOOL userBufferAndHostMatch;
// Used for Mono >> Stereo workaround, if driver does not support it
// (in Exclusive mode WASAPI usually refuses to operate with Mono (1-ch)
void *monoBuffer; //!< pointer to buffer
UINT32 monoBufferSize; //!< buffer size in bytes
MixMonoToStereoF monoMixer; //!< pointer to mixer function
PaUtilRingBuffer *tailBuffer; //!< buffer with trailing sample for blocking mode operations (only for Input)
void *tailBufferMemory; //!< tail buffer memory region
}
PaWasapiSubStream;
// ------------------------------------------------------------------------------------------
/* PaWasapiHostProcessor - redirects processing data */
typedef struct PaWasapiHostProcessor
{
PaWasapiHostProcessorCallback processor;
void *userData;
}
PaWasapiHostProcessor;
// ------------------------------------------------------------------------------------------
typedef struct PaWasapiStream
{
/* IMPLEMENT ME: rename this */
PaUtilStreamRepresentation streamRepresentation;
PaUtilCpuLoadMeasurer cpuLoadMeasurer;
PaUtilBufferProcessor bufferProcessor;
// input
PaWasapiSubStream in;
IAudioCaptureClient *captureClientParent;
#ifndef PA_WINRT
IStream *captureClientStream;
#endif
IAudioCaptureClient *captureClient;
IAudioEndpointVolume *inVol;
// output
PaWasapiSubStream out;
IAudioRenderClient *renderClientParent;
#ifndef PA_WINRT
IStream *renderClientStream;
#endif
IAudioRenderClient *renderClient;
IAudioEndpointVolume *outVol;
// event handles for event-driven processing mode
HANDLE event[S_COUNT];
// buffer mode
PaUtilHostBufferSizeMode bufferMode;
// must be volatile to avoid race condition on user query while
// thread is being started
volatile BOOL running;
PA_THREAD_ID dwThreadId;
HANDLE hThread;
HANDLE hCloseRequest;
HANDLE hThreadStart; //!< signalled by thread on start
HANDLE hThreadExit; //!< signalled by thread on exit
HANDLE hBlockingOpStreamRD;
HANDLE hBlockingOpStreamWR;
// Host callback Output overrider
PaWasapiHostProcessor hostProcessOverrideOutput;
// Host callback Input overrider
PaWasapiHostProcessor hostProcessOverrideInput;
// Defines blocking/callback interface used
BOOL bBlocking;
// Av Task (MM thread management)
HANDLE hAvTask;
// Thread priority level
PaWasapiThreadPriority nThreadPriority;
// State handler
PaWasapiStreamStateCallback fnStateHandler;
void *pStateHandlerUserData;
}
PaWasapiStream;
// COM marshaling
static HRESULT MarshalSubStreamComPointers(PaWasapiSubStream *substream);
static HRESULT MarshalStreamComPointers(PaWasapiStream *stream);
static HRESULT UnmarshalSubStreamComPointers(PaWasapiSubStream *substream);
static HRESULT UnmarshalStreamComPointers(PaWasapiStream *stream);
static void ReleaseUnmarshaledSubComPointers(PaWasapiSubStream *substream);
static void ReleaseUnmarshaledComPointers(PaWasapiStream *stream);
// Local methods
static void _StreamOnStop(PaWasapiStream *stream);
static void _StreamFinish(PaWasapiStream *stream);
static void _StreamCleanup(PaWasapiStream *stream);
static HRESULT _PollGetOutputFramesAvailable(PaWasapiStream *stream, UINT32 *available);
static HRESULT _PollGetInputFramesAvailable(PaWasapiStream *stream, UINT32 *available);
static void *PaWasapi_ReallocateMemory(void *prev, size_t size);
static void PaWasapi_FreeMemory(void *ptr);
static PaSampleFormat WaveToPaFormat(const WAVEFORMATEXTENSIBLE *fmtext);
// Local statics
#ifdef PA_WINRT
static OLECHAR g_DefaultRenderId[PA_WASAPI_DEVICE_ID_LEN] = { 0 };
static OLECHAR g_DefaultCaptureId[PA_WASAPI_DEVICE_ID_LEN] = { 0 };
#endif
// ------------------------------------------------------------------------------------------
#define LogHostError(HRES) __LogHostError(HRES, __FUNCTION__, __FILE__, __LINE__)
static HRESULT __LogHostError(HRESULT res, const char *func, const char *file, int line)
{
const char *text = NULL;
switch (res)
{
case S_OK: return res;
case E_POINTER :text ="E_POINTER"; break;
case E_INVALIDARG :text ="E_INVALIDARG"; break;
case AUDCLNT_E_NOT_INITIALIZED :text ="AUDCLNT_E_NOT_INITIALIZED"; break;
case AUDCLNT_E_ALREADY_INITIALIZED :text ="AUDCLNT_E_ALREADY_INITIALIZED"; break;
case AUDCLNT_E_WRONG_ENDPOINT_TYPE :text ="AUDCLNT_E_WRONG_ENDPOINT_TYPE"; break;
case AUDCLNT_E_DEVICE_INVALIDATED :text ="AUDCLNT_E_DEVICE_INVALIDATED"; break;
case AUDCLNT_E_NOT_STOPPED :text ="AUDCLNT_E_NOT_STOPPED"; break;
case AUDCLNT_E_BUFFER_TOO_LARGE :text ="AUDCLNT_E_BUFFER_TOO_LARGE"; break;
case AUDCLNT_E_OUT_OF_ORDER :text ="AUDCLNT_E_OUT_OF_ORDER"; break;
case AUDCLNT_E_UNSUPPORTED_FORMAT :text ="AUDCLNT_E_UNSUPPORTED_FORMAT"; break;
case AUDCLNT_E_INVALID_SIZE :text ="AUDCLNT_E_INVALID_SIZE"; break;
case AUDCLNT_E_DEVICE_IN_USE :text ="AUDCLNT_E_DEVICE_IN_USE"; break;
case AUDCLNT_E_BUFFER_OPERATION_PENDING :text ="AUDCLNT_E_BUFFER_OPERATION_PENDING"; break;
case AUDCLNT_E_THREAD_NOT_REGISTERED :text ="AUDCLNT_E_THREAD_NOT_REGISTERED"; break;
case AUDCLNT_E_EXCLUSIVE_MODE_NOT_ALLOWED :text ="AUDCLNT_E_EXCLUSIVE_MODE_NOT_ALLOWED"; break;
case AUDCLNT_E_ENDPOINT_CREATE_FAILED :text ="AUDCLNT_E_ENDPOINT_CREATE_FAILED"; break;
case AUDCLNT_E_SERVICE_NOT_RUNNING :text ="AUDCLNT_E_SERVICE_NOT_RUNNING"; break;
case AUDCLNT_E_EVENTHANDLE_NOT_EXPECTED :text ="AUDCLNT_E_EVENTHANDLE_NOT_EXPECTED"; break;
case AUDCLNT_E_EXCLUSIVE_MODE_ONLY :text ="AUDCLNT_E_EXCLUSIVE_MODE_ONLY"; break;
case AUDCLNT_E_BUFDURATION_PERIOD_NOT_EQUAL :text ="AUDCLNT_E_BUFDURATION_PERIOD_NOT_EQUAL"; break;
case AUDCLNT_E_EVENTHANDLE_NOT_SET :text ="AUDCLNT_E_EVENTHANDLE_NOT_SET"; break;
case AUDCLNT_E_INCORRECT_BUFFER_SIZE :text ="AUDCLNT_E_INCORRECT_BUFFER_SIZE"; break;
case AUDCLNT_E_BUFFER_SIZE_ERROR :text ="AUDCLNT_E_BUFFER_SIZE_ERROR"; break;
case AUDCLNT_E_CPUUSAGE_EXCEEDED :text ="AUDCLNT_E_CPUUSAGE_EXCEEDED"; break;
case AUDCLNT_E_BUFFER_ERROR :text ="AUDCLNT_E_BUFFER_ERROR"; break;
case AUDCLNT_E_BUFFER_SIZE_NOT_ALIGNED :text ="AUDCLNT_E_BUFFER_SIZE_NOT_ALIGNED"; break;
case AUDCLNT_E_INVALID_DEVICE_PERIOD :text ="AUDCLNT_E_INVALID_DEVICE_PERIOD"; break;
#ifdef AUDCLNT_E_INVALID_STREAM_FLAG
case AUDCLNT_E_INVALID_STREAM_FLAG :text ="AUDCLNT_E_INVALID_STREAM_FLAG"; break;
#endif
#ifdef AUDCLNT_E_ENDPOINT_OFFLOAD_NOT_CAPABLE
case AUDCLNT_E_ENDPOINT_OFFLOAD_NOT_CAPABLE :text ="AUDCLNT_E_ENDPOINT_OFFLOAD_NOT_CAPABLE"; break;
#endif
#ifdef AUDCLNT_E_OUT_OF_OFFLOAD_RESOURCES
case AUDCLNT_E_OUT_OF_OFFLOAD_RESOURCES :text ="AUDCLNT_E_OUT_OF_OFFLOAD_RESOURCES"; break;
#endif
#ifdef AUDCLNT_E_OFFLOAD_MODE_ONLY
case AUDCLNT_E_OFFLOAD_MODE_ONLY :text ="AUDCLNT_E_OFFLOAD_MODE_ONLY"; break;
#endif
#ifdef AUDCLNT_E_NONOFFLOAD_MODE_ONLY
case AUDCLNT_E_NONOFFLOAD_MODE_ONLY :text ="AUDCLNT_E_NONOFFLOAD_MODE_ONLY"; break;
#endif
#ifdef AUDCLNT_E_RESOURCES_INVALIDATED
case AUDCLNT_E_RESOURCES_INVALIDATED :text ="AUDCLNT_E_RESOURCES_INVALIDATED"; break;
#endif
#ifdef AUDCLNT_E_RAW_MODE_UNSUPPORTED
case AUDCLNT_E_RAW_MODE_UNSUPPORTED :text ="AUDCLNT_E_RAW_MODE_UNSUPPORTED"; break;
#endif
#ifdef AUDCLNT_E_ENGINE_PERIODICITY_LOCKED
case AUDCLNT_E_ENGINE_PERIODICITY_LOCKED :text ="AUDCLNT_E_ENGINE_PERIODICITY_LOCKED"; break;
#endif
#ifdef AUDCLNT_E_ENGINE_FORMAT_LOCKED
case AUDCLNT_E_ENGINE_FORMAT_LOCKED :text ="AUDCLNT_E_ENGINE_FORMAT_LOCKED"; break;
#endif
case AUDCLNT_S_BUFFER_EMPTY :text ="AUDCLNT_S_BUFFER_EMPTY"; break;
case AUDCLNT_S_THREAD_ALREADY_REGISTERED :text ="AUDCLNT_S_THREAD_ALREADY_REGISTERED"; break;
case AUDCLNT_S_POSITION_STALLED :text ="AUDCLNT_S_POSITION_STALLED"; break;
// other windows common errors:
case CO_E_NOTINITIALIZED :text ="CO_E_NOTINITIALIZED: you must call CoInitialize() before Pa_OpenStream()"; break;
default:
text = "UNKNOWN ERROR";
}
PRINT(("WASAPI ERROR HRESULT: 0x%X : %s\n [FUNCTION: %s FILE: %s {LINE: %d}]\n", res, text, func, file, line));
#ifndef PA_ENABLE_DEBUG_OUTPUT
(void)func; (void)file; (void)line;
#endif
PA_SKELETON_SET_LAST_HOST_ERROR(res, text);
return res;
}
// ------------------------------------------------------------------------------------------
#define LogPaError(PAERR) __LogPaError(PAERR, __FUNCTION__, __FILE__, __LINE__)
static PaError __LogPaError(PaError err, const char *func, const char *file, int line)
{
if (err == paNoError)
return err;
PRINT(("WASAPI ERROR PAERROR: %i : %s\n [FUNCTION: %s FILE: %s {LINE: %d}]\n", err, Pa_GetErrorText(err), func, file, line));
#ifndef PA_ENABLE_DEBUG_OUTPUT
(void)func; (void)file; (void)line;
#endif
return err;
}
// ------------------------------------------------------------------------------------------
/*! \class ThreadSleepScheduler
Allows to emulate thread sleep of less than 1 millisecond under Windows. Scheduler
calculates number of times the thread must run untill next sleep of 1 millisecond.
It does not make thread sleeping for real number of microseconds but rather controls
how many of imaginary microseconds the thread task can allow thread to sleep.
*/
typedef struct ThreadIdleScheduler
{
UINT32 m_idle_microseconds; //!< number of microseconds to sleep
UINT32 m_next_sleep; //!< next sleep round
UINT32 m_i; //!< current round iterator position
UINT32 m_resolution; //!< resolution in number of milliseconds
}
ThreadIdleScheduler;
//! Setup scheduler.
static void ThreadIdleScheduler_Setup(ThreadIdleScheduler *sched, UINT32 resolution, UINT32 microseconds)
{
assert(microseconds != 0);
assert(resolution != 0);
assert((resolution * 1000) >= microseconds);
memset(sched, 0, sizeof(*sched));
sched->m_idle_microseconds = microseconds;
sched->m_resolution = resolution;
sched->m_next_sleep = (resolution * 1000) / microseconds;
}
//! Iterate and check if can sleep.
static inline UINT32 ThreadIdleScheduler_NextSleep(ThreadIdleScheduler *sched)
{
// advance and check if thread can sleep
if (++sched->m_i == sched->m_next_sleep)
{
sched->m_i = 0;
return sched->m_resolution;
}
return 0;
}
// ------------------------------------------------------------------------------------------
typedef struct _SystemTimer
{
UINT32 granularity;
} SystemTimer;
static LARGE_INTEGER g_SystemTimerFrequency;
static BOOL g_SystemTimerUseQpc = FALSE;
//! Set granularity of the system timer.
static BOOL SystemTimer_SetGranularity(SystemTimer *timer, UINT32 granularity)
{
#ifndef PA_WINRT
TIMECAPS caps;
timer->granularity = granularity;
if (timeGetDevCaps(&caps, sizeof(caps)) == MMSYSERR_NOERROR)
{
if (timer->granularity < caps.wPeriodMin)
timer->granularity = caps.wPeriodMin;
}
if (timeBeginPeriod(timer->granularity) != TIMERR_NOERROR)
{
PRINT(("SetSystemTimer: timeBeginPeriod(1) failed!\n"));
timer->granularity = 0;
return FALSE;
}
#endif
return TRUE;
}
//! Restore granularity of the system timer.
static void SystemTimer_RestoreGranularity(SystemTimer *timer)
{
#ifndef PA_WINRT
if (timer->granularity != 0)
{
if (timeEndPeriod(timer->granularity) != TIMERR_NOERROR)
{
PRINT(("RestoreSystemTimer: timeEndPeriod(1) failed!\n"));
}
}
#endif
}
//! Initialize high-resolution time getter.
static void SystemTimer_InitializeTimeGetter()
{
g_SystemTimerUseQpc = QueryPerformanceFrequency(&g_SystemTimerFrequency);
}
//! Get high-resolution time in milliseconds (using QPC by default).
static inline LONGLONG SystemTimer_GetTime(SystemTimer *timer)
{
// QPC: https://docs.microsoft.com/en-us/windows/win32/sysinfo/acquiring-high-resolution-time-stamps
if (g_SystemTimerUseQpc)
{
LARGE_INTEGER now;
QueryPerformanceCounter(&now);
return (now.QuadPart * 1000LL) / g_SystemTimerFrequency.QuadPart;
}
else
{
#ifdef PA_WINRT
return GetTickCount64();
#else
return timeGetTime();
#endif
}
}
// ------------------------------------------------------------------------------------------
/*static double nano100ToMillis(REFERENCE_TIME ref)
{
// 1 nano = 0.000000001 seconds
//100 nano = 0.0000001 seconds
//100 nano = 0.0001 milliseconds
return ((double)ref)*0.0001;
}*/
// ------------------------------------------------------------------------------------------
static double nano100ToSeconds(REFERENCE_TIME ref)
{
// 1 nano = 0.000000001 seconds
//100 nano = 0.0000001 seconds
//100 nano = 0.0001 milliseconds
return ((double)ref)*0.0000001;
}
// ------------------------------------------------------------------------------------------
/*static REFERENCE_TIME MillisTonano100(double ref)
{
// 1 nano = 0.000000001 seconds
//100 nano = 0.0000001 seconds
//100 nano = 0.0001 milliseconds
return (REFERENCE_TIME)(ref/0.0001);
}*/
// ------------------------------------------------------------------------------------------
static REFERENCE_TIME SecondsTonano100(double ref)
{
// 1 nano = 0.000000001 seconds
//100 nano = 0.0000001 seconds
//100 nano = 0.0001 milliseconds
return (REFERENCE_TIME)(ref/0.0000001);
}
// ------------------------------------------------------------------------------------------
// Makes Hns period from frames and sample rate
static REFERENCE_TIME MakeHnsPeriod(UINT32 nFrames, DWORD nSamplesPerSec)
{
return (REFERENCE_TIME)((10000.0 * 1000 / nSamplesPerSec * nFrames) + 0.5);
}
// ------------------------------------------------------------------------------------------
// Converts PaSampleFormat to bits per sample value
// Note: paCustomFormat stands for 8.24 format (24-bits inside 32-bit containers)
static WORD PaSampleFormatToBitsPerSample(PaSampleFormat format_id)
{
switch (format_id & ~paNonInterleaved)
{
case paFloat32:
case paInt32: return 32;
case paCustomFormat:
case paInt24: return 24;
case paInt16: return 16;
case paInt8:
case paUInt8: return 8;
}
return 0;
}
// ------------------------------------------------------------------------------------------
// Convert PaSampleFormat to valid sample format for I/O, e.g. if paCustomFormat is specified
// it will be converted to paInt32, other formats pass through
// Note: paCustomFormat stands for 8.24 format (24-bits inside 32-bit containers)
static PaSampleFormat GetSampleFormatForIO(PaSampleFormat format_id)
{
return ((format_id & ~paNonInterleaved) == paCustomFormat ?
(paInt32 | (format_id & paNonInterleaved ? paNonInterleaved : 0)) : format_id);
}
// ------------------------------------------------------------------------------------------
// Converts Hns period into number of frames
static UINT32 MakeFramesFromHns(REFERENCE_TIME hnsPeriod, UINT32 nSamplesPerSec)
{
UINT32 nFrames = (UINT32)( // frames =
1.0 * hnsPeriod * // hns *
nSamplesPerSec / // (frames / s) /
1000 / // (ms / s) /
10000 // (hns / s) /
+ 0.5 // rounding
);
return nFrames;
}
// Aligning function type
typedef UINT32 (*ALIGN_FUNC) (UINT32 v, UINT32 align);
// ------------------------------------------------------------------------------------------
// Aligns 'v' backwards
static UINT32 ALIGN_BWD(UINT32 v, UINT32 align)
{
return ((v - (align ? v % align : 0)));
}
// ------------------------------------------------------------------------------------------
// Aligns 'v' forward
static UINT32 ALIGN_FWD(UINT32 v, UINT32 align)
{
UINT32 remainder = (align ? (v % align) : 0);
if (remainder == 0)
return v;
return v + (align - remainder);
}
// ------------------------------------------------------------------------------------------
// Get next value power of 2
static UINT32 ALIGN_NEXT_POW2(UINT32 v)
{
UINT32 v2 = 1;
while (v > (v2 <<= 1)) { }
v = v2;
return v;
}
// ------------------------------------------------------------------------------------------
// Aligns WASAPI buffer to 128 byte packet boundary. HD Audio will fail to play if buffer
// is misaligned. This problem was solved in Windows 7 were AUDCLNT_E_BUFFER_SIZE_NOT_ALIGNED
// is thrown although we must align for Vista anyway.
static UINT32 AlignFramesPerBuffer(UINT32 nFrames, UINT32 nSamplesPerSec, UINT32 nBlockAlign,
ALIGN_FUNC pAlignFunc)
{
#define HDA_PACKET_SIZE (128)
long frame_bytes = nFrames * nBlockAlign;
long packets;
(void)nSamplesPerSec;
// align to packet size
frame_bytes = pAlignFunc(frame_bytes, HDA_PACKET_SIZE); // use ALIGN_FWD if bigger but safer period is more desired
// atlest 1 frame must be available
if (frame_bytes < HDA_PACKET_SIZE)
frame_bytes = HDA_PACKET_SIZE;
nFrames = frame_bytes / nBlockAlign;
packets = frame_bytes / HDA_PACKET_SIZE;
frame_bytes = packets * HDA_PACKET_SIZE;
nFrames = frame_bytes / nBlockAlign;
return nFrames;
#undef HDA_PACKET_SIZE
}
// ------------------------------------------------------------------------------------------
static UINT32 GetFramesSleepTime(REFERENCE_TIME nFrames, REFERENCE_TIME nSamplesPerSec)
{
REFERENCE_TIME nDuration;
if (nSamplesPerSec == 0)
return 0;