notaz.gp2x.de / sdl_omap.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
SDL-1.2.14
[sdl_omap.git] / src / audio / windx5 / SDL_dx5audio.c
CommitLineData
e14743d1 1/*
2 SDL - Simple DirectMedia Layer
3 Copyright (C) 1997-2009 Sam Lantinga
4
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 This library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with this library; if not, write to the Free Software
17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18
19 Sam Lantinga
20 slouken@libsdl.org
21*/
22#include "SDL_config.h"
23
24/* Allow access to a raw mixing buffer */
25
26#include "SDL_timer.h"
27#include "SDL_audio.h"
28#include "../SDL_audio_c.h"
29#include "SDL_dx5audio.h"
30
31/* Define this if you want to use DirectX 6 DirectSoundNotify interface */
32//#define USE_POSITION_NOTIFY
33
34/* DirectX function pointers for audio */
35HRESULT (WINAPI *DSoundCreate)(LPGUID, LPDIRECTSOUND *, LPUNKNOWN);
36
37/* Audio driver functions */
38static int DX5_OpenAudio(_THIS, SDL_AudioSpec *spec);
39static void DX5_ThreadInit(_THIS);
40static void DX5_WaitAudio_BusyWait(_THIS);
41#ifdef USE_POSITION_NOTIFY
42static void DX6_WaitAudio_EventWait(_THIS);
43#endif
44static void DX5_PlayAudio(_THIS);
45static Uint8 *DX5_GetAudioBuf(_THIS);
46static void DX5_WaitDone(_THIS);
47static void DX5_CloseAudio(_THIS);
48
49/* Audio driver bootstrap functions */
50
51static int Audio_Available(void)
52{
53 HINSTANCE DSoundDLL;
54 int dsound_ok;
55
56 /* Version check DSOUND.DLL (Is DirectX okay?) */
57 dsound_ok = 0;
58 DSoundDLL = LoadLibrary(TEXT("DSOUND.DLL"));
59 if ( DSoundDLL != NULL ) {
60 /* We just use basic DirectSound, we're okay */
61 /* Yay! */
62 /* Unfortunately, the sound drivers on NT have
63 higher latencies than the audio buffers used
64 by many SDL applications, so there are gaps
65 in the audio - it sounds terrible. Punt for now.
66 */
67 OSVERSIONINFO ver;
68 ver.dwOSVersionInfoSize = sizeof (OSVERSIONINFO);
69 GetVersionEx(&ver);
70 switch (ver.dwPlatformId) {
71 case VER_PLATFORM_WIN32_NT:
72 if ( ver.dwMajorVersion > 4 ) {
73 /* Win2K */
74 dsound_ok = 1;
75 } else {
76 /* WinNT */
77 dsound_ok = 0;
78 }
79 break;
80 default:
81 /* Win95 or Win98 */
82 dsound_ok = 1;
83 break;
84 }
85 /* Now check for DirectX 5 or better - otherwise
86 * we will fail later in DX5_OpenAudio without a chance
87 * to fall back to the DIB driver. */
88 if (dsound_ok) {
89 /* DirectSoundCaptureCreate was added in DX5 */
90 if (!GetProcAddress(DSoundDLL, TEXT("DirectSoundCaptureCreate")))
91 dsound_ok = 0;
92
93 }
94 /* Clean up.. */
95 FreeLibrary(DSoundDLL);
96 }
97 return(dsound_ok);
98}
99
100/* Functions for loading the DirectX functions dynamically */
101static HINSTANCE DSoundDLL = NULL;
102
103static void DX5_Unload(void)
104{
105 if ( DSoundDLL != NULL ) {
106 FreeLibrary(DSoundDLL);
107 DSoundCreate = NULL;
108 DSoundDLL = NULL;
109 }
110}
111static int DX5_Load(void)
112{
113 int status;
114
115 DX5_Unload();
116 DSoundDLL = LoadLibrary(TEXT("DSOUND.DLL"));
117 if ( DSoundDLL != NULL ) {
118 DSoundCreate = (void *)GetProcAddress(DSoundDLL,
119 TEXT("DirectSoundCreate"));
120 }
121 if ( DSoundDLL && DSoundCreate ) {
122 status = 0;
123 } else {
124 DX5_Unload();
125 status = -1;
126 }
127 return status;
128}
129
130static void Audio_DeleteDevice(SDL_AudioDevice *device)
131{
132 DX5_Unload();
133 SDL_free(device->hidden);
134 SDL_free(device);
135}
136
137static SDL_AudioDevice *Audio_CreateDevice(int devindex)
138{
139 SDL_AudioDevice *this;
140
141 /* Load DirectX */
142 if ( DX5_Load() < 0 ) {
143 return(NULL);
144 }
145
146 /* Initialize all variables that we clean on shutdown */
147 this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice));
148 if ( this ) {
149 SDL_memset(this, 0, (sizeof *this));
150 this->hidden = (struct SDL_PrivateAudioData *)
151 SDL_malloc((sizeof *this->hidden));
152 }
153 if ( (this == NULL) || (this->hidden == NULL) ) {
154 SDL_OutOfMemory();
155 if ( this ) {
156 SDL_free(this);
157 }
158 return(0);
159 }
160 SDL_memset(this->hidden, 0, (sizeof *this->hidden));
161
162 /* Set the function pointers */
163 this->OpenAudio = DX5_OpenAudio;
164 this->ThreadInit = DX5_ThreadInit;
165 this->WaitAudio = DX5_WaitAudio_BusyWait;
166 this->PlayAudio = DX5_PlayAudio;
167 this->GetAudioBuf = DX5_GetAudioBuf;
168 this->WaitDone = DX5_WaitDone;
169 this->CloseAudio = DX5_CloseAudio;
170
171 this->free = Audio_DeleteDevice;
172
173 return this;
174}
175
176AudioBootStrap DSOUND_bootstrap = {
177 "dsound", "Win95/98/2000 DirectSound",
178 Audio_Available, Audio_CreateDevice
179};
180
181static void SetDSerror(const char *function, int code)
182{
183 static const char *error;
184 static char errbuf[1024];
185
186 errbuf[0] = 0;
187 switch (code) {
188 case E_NOINTERFACE:
189 error =
190 "Unsupported interface\n-- Is DirectX 5.0 or later installed?";
191 break;
192 case DSERR_ALLOCATED:
193 error = "Audio device in use";
194 break;
195 case DSERR_BADFORMAT:
196 error = "Unsupported audio format";
197 break;
198 case DSERR_BUFFERLOST:
199 error = "Mixing buffer was lost";
200 break;
201 case DSERR_CONTROLUNAVAIL:
202 error = "Control requested is not available";
203 break;
204 case DSERR_INVALIDCALL:
205 error = "Invalid call for the current state";
206 break;
207 case DSERR_INVALIDPARAM:
208 error = "Invalid parameter";
209 break;
210 case DSERR_NODRIVER:
211 error = "No audio device found";
212 break;
213 case DSERR_OUTOFMEMORY:
214 error = "Out of memory";
215 break;
216 case DSERR_PRIOLEVELNEEDED:
217 error = "Caller doesn't have priority";
218 break;
219 case DSERR_UNSUPPORTED:
220 error = "Function not supported";
221 break;
222 default:
223 SDL_snprintf(errbuf, SDL_arraysize(errbuf),
224 "%s: Unknown DirectSound error: 0x%x",
225 function, code);
226 break;
227 }
228 if ( ! errbuf[0] ) {
229 SDL_snprintf(errbuf, SDL_arraysize(errbuf), "%s: %s", function, error);
230 }
231 SDL_SetError("%s", errbuf);
232 return;
233}
234
235/* DirectSound needs to be associated with a window */
236static HWND mainwin = NULL;
237/* */
238void DX5_SoundFocus(HWND hwnd)
239{
240 mainwin = hwnd;
241}
242
243static void DX5_ThreadInit(_THIS)
244{
245 SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_HIGHEST);
246}
247
248static void DX5_WaitAudio_BusyWait(_THIS)
249{
250 DWORD status;
251 DWORD cursor, junk;
252 HRESULT result;
253
254 /* Semi-busy wait, since we have no way of getting play notification
255 on a primary mixing buffer located in hardware (DirectX 5.0)
256 */
257 result = IDirectSoundBuffer_GetCurrentPosition(mixbuf, &junk, &cursor);
258 if ( result != DS_OK ) {
259 if ( result == DSERR_BUFFERLOST ) {
260 IDirectSoundBuffer_Restore(mixbuf);
261 }
262#ifdef DEBUG_SOUND
263 SetDSerror("DirectSound GetCurrentPosition", result);
264#endif
265 return;
266 }
267
268 while ( (cursor/mixlen) == lastchunk ) {
269 /* FIXME: find out how much time is left and sleep that long */
270 SDL_Delay(1);
271
272 /* Try to restore a lost sound buffer */
273 IDirectSoundBuffer_GetStatus(mixbuf, &status);
274 if ( (status&DSBSTATUS_BUFFERLOST) ) {
275 IDirectSoundBuffer_Restore(mixbuf);
276 IDirectSoundBuffer_GetStatus(mixbuf, &status);
277 if ( (status&DSBSTATUS_BUFFERLOST) ) {
278 break;
279 }
280 }
281 if ( ! (status&DSBSTATUS_PLAYING) ) {
282 result = IDirectSoundBuffer_Play(mixbuf, 0, 0, DSBPLAY_LOOPING);
283 if ( result == DS_OK ) {
284 continue;
285 }
286#ifdef DEBUG_SOUND
287 SetDSerror("DirectSound Play", result);
288#endif
289 return;
290 }
291
292 /* Find out where we are playing */
293 result = IDirectSoundBuffer_GetCurrentPosition(mixbuf,
294 &junk, &cursor);
295 if ( result != DS_OK ) {
296 SetDSerror("DirectSound GetCurrentPosition", result);
297 return;
298 }
299 }
300}
301
302#ifdef USE_POSITION_NOTIFY
303static void DX6_WaitAudio_EventWait(_THIS)
304{
305 DWORD status;
306 HRESULT result;
307
308 /* Try to restore a lost sound buffer */
309 IDirectSoundBuffer_GetStatus(mixbuf, &status);
310 if ( (status&DSBSTATUS_BUFFERLOST) ) {
311 IDirectSoundBuffer_Restore(mixbuf);
312 IDirectSoundBuffer_GetStatus(mixbuf, &status);
313 if ( (status&DSBSTATUS_BUFFERLOST) ) {
314 return;
315 }
316 }
317 if ( ! (status&DSBSTATUS_PLAYING) ) {
318 result = IDirectSoundBuffer_Play(mixbuf, 0, 0, DSBPLAY_LOOPING);
319 if ( result != DS_OK ) {
320#ifdef DEBUG_SOUND
321 SetDSerror("DirectSound Play", result);
322#endif
323 return;
324 }
325 }
326 WaitForSingleObject(audio_event, INFINITE);
327}
328#endif /* USE_POSITION_NOTIFY */
329
330static void DX5_PlayAudio(_THIS)
331{
332 /* Unlock the buffer, allowing it to play */
333 if ( locked_buf ) {
334 IDirectSoundBuffer_Unlock(mixbuf, locked_buf, mixlen, NULL, 0);
335 }
336
337}
338
339static Uint8 *DX5_GetAudioBuf(_THIS)
340{
341 DWORD cursor, junk;
342 HRESULT result;
343 DWORD rawlen;
344
345 /* Figure out which blocks to fill next */
346 locked_buf = NULL;
347 result = IDirectSoundBuffer_GetCurrentPosition(mixbuf, &junk, &cursor);
348 if ( result == DSERR_BUFFERLOST ) {
349 IDirectSoundBuffer_Restore(mixbuf);
350 result = IDirectSoundBuffer_GetCurrentPosition(mixbuf,
351 &junk, &cursor);
352 }
353 if ( result != DS_OK ) {
354 SetDSerror("DirectSound GetCurrentPosition", result);
355 return(NULL);
356 }
357 cursor /= mixlen;
358#ifdef DEBUG_SOUND
359 /* Detect audio dropouts */
360 { DWORD spot = cursor;
361 if ( spot < lastchunk ) {
362 spot += NUM_BUFFERS;
363 }
364 if ( spot > lastchunk+1 ) {
365 fprintf(stderr, "Audio dropout, missed %d fragments\n",
366 (spot - (lastchunk+1)));
367 }
368 }
369#endif
370 lastchunk = cursor;
371 cursor = (cursor+1)%NUM_BUFFERS;
372 cursor *= mixlen;
373
374 /* Lock the audio buffer */
375 result = IDirectSoundBuffer_Lock(mixbuf, cursor, mixlen,
376 (LPVOID *)&locked_buf, &rawlen, NULL, &junk, 0);
377 if ( result == DSERR_BUFFERLOST ) {
378 IDirectSoundBuffer_Restore(mixbuf);
379 result = IDirectSoundBuffer_Lock(mixbuf, cursor, mixlen,
380 (LPVOID *)&locked_buf, &rawlen, NULL, &junk, 0);
381 }
382 if ( result != DS_OK ) {
383 SetDSerror("DirectSound Lock", result);
384 return(NULL);
385 }
386 return(locked_buf);
387}
388
389static void DX5_WaitDone(_THIS)
390{
391 Uint8 *stream;
392
393 /* Wait for the playing chunk to finish */
394 stream = this->GetAudioBuf(this);
395 if ( stream != NULL ) {
396 SDL_memset(stream, silence, mixlen);
397 this->PlayAudio(this);
398 }
399 this->WaitAudio(this);
400
401 /* Stop the looping sound buffer */
402 IDirectSoundBuffer_Stop(mixbuf);
403}
404
405static void DX5_CloseAudio(_THIS)
406{
407 if ( sound != NULL ) {
408 if ( mixbuf != NULL ) {
409 /* Clean up the audio buffer */
410 IDirectSoundBuffer_Release(mixbuf);
411 mixbuf = NULL;
412 }
413 if ( audio_event != NULL ) {
414 CloseHandle(audio_event);
415 audio_event = NULL;
416 }
417 IDirectSound_Release(sound);
418 sound = NULL;
419 }
420}
421
422#ifdef USE_PRIMARY_BUFFER
423/* This function tries to create a primary audio buffer, and returns the
424 number of audio chunks available in the created buffer.
425*/
426static int CreatePrimary(LPDIRECTSOUND sndObj, HWND focus,
427 LPDIRECTSOUNDBUFFER *sndbuf, WAVEFORMATEX *wavefmt, Uint32 chunksize)
428{
429 HRESULT result;
430 DSBUFFERDESC format;
431 DSBCAPS caps;
432 int numchunks;
433
434 /* Try to set primary mixing privileges */
435 result = IDirectSound_SetCooperativeLevel(sndObj, focus,
436 DSSCL_WRITEPRIMARY);
437 if ( result != DS_OK ) {
438#ifdef DEBUG_SOUND
439 SetDSerror("DirectSound SetCooperativeLevel", result);
440#endif
441 return(-1);
442 }
443
444 /* Try to create the primary buffer */
445 SDL_memset(&format, 0, sizeof(format));
446 format.dwSize = sizeof(format);
447 format.dwFlags=(DSBCAPS_PRIMARYBUFFER|DSBCAPS_GETCURRENTPOSITION2);
448 format.dwFlags |= DSBCAPS_STICKYFOCUS;
449#ifdef USE_POSITION_NOTIFY
450 format.dwFlags |= DSBCAPS_CTRLPOSITIONNOTIFY;
451#endif
452 result = IDirectSound_CreateSoundBuffer(sndObj, &format, sndbuf, NULL);
453 if ( result != DS_OK ) {
454#ifdef DEBUG_SOUND
455 SetDSerror("DirectSound CreateSoundBuffer", result);
456#endif
457 return(-1);
458 }
459
460 /* Check the size of the fragment buffer */
461 SDL_memset(&caps, 0, sizeof(caps));
462 caps.dwSize = sizeof(caps);
463 result = IDirectSoundBuffer_GetCaps(*sndbuf, &caps);
464 if ( result != DS_OK ) {
465#ifdef DEBUG_SOUND
466 SetDSerror("DirectSound GetCaps", result);
467#endif
468 IDirectSoundBuffer_Release(*sndbuf);
469 return(-1);
470 }
471 if ( (chunksize > caps.dwBufferBytes) ||
472 ((caps.dwBufferBytes%chunksize) != 0) ) {
473 /* The primary buffer size is not a multiple of 'chunksize'
474 -- this hopefully doesn't happen when 'chunksize' is a
475 power of 2.
476 */
477 IDirectSoundBuffer_Release(*sndbuf);
478 SDL_SetError(
479"Primary buffer size is: %d, cannot break it into chunks of %d bytes\n",
480 caps.dwBufferBytes, chunksize);
481 return(-1);
482 }
483 numchunks = (caps.dwBufferBytes/chunksize);
484
485 /* Set the primary audio format */
486 result = IDirectSoundBuffer_SetFormat(*sndbuf, wavefmt);
487 if ( result != DS_OK ) {
488#ifdef DEBUG_SOUND
489 SetDSerror("DirectSound SetFormat", result);
490#endif
491 IDirectSoundBuffer_Release(*sndbuf);
492 return(-1);
493 }
494 return(numchunks);
495}
496#endif /* USE_PRIMARY_BUFFER */
497
498/* This function tries to create a secondary audio buffer, and returns the
499 number of audio chunks available in the created buffer.
500*/
501static int CreateSecondary(LPDIRECTSOUND sndObj, HWND focus,
502 LPDIRECTSOUNDBUFFER *sndbuf, WAVEFORMATEX *wavefmt, Uint32 chunksize)
503{
504 const int numchunks = 8;
505 HRESULT result;
506 DSBUFFERDESC format;
507 LPVOID pvAudioPtr1, pvAudioPtr2;
508 DWORD dwAudioBytes1, dwAudioBytes2;
509
510 /* Try to set primary mixing privileges */
511 if ( focus ) {
512 result = IDirectSound_SetCooperativeLevel(sndObj,
513 focus, DSSCL_PRIORITY);
514 } else {
515 result = IDirectSound_SetCooperativeLevel(sndObj,
516 GetDesktopWindow(), DSSCL_NORMAL);
517 }
518 if ( result != DS_OK ) {
519#ifdef DEBUG_SOUND
520 SetDSerror("DirectSound SetCooperativeLevel", result);
521#endif
522 return(-1);
523 }
524
525 /* Try to create the secondary buffer */
526 SDL_memset(&format, 0, sizeof(format));
527 format.dwSize = sizeof(format);
528 format.dwFlags = DSBCAPS_GETCURRENTPOSITION2;
529#ifdef USE_POSITION_NOTIFY
530 format.dwFlags |= DSBCAPS_CTRLPOSITIONNOTIFY;
531#endif
532 if ( ! focus ) {
533 format.dwFlags |= DSBCAPS_GLOBALFOCUS;
534 } else {
535 format.dwFlags |= DSBCAPS_STICKYFOCUS;
536 }
537 format.dwBufferBytes = numchunks*chunksize;
538 if ( (format.dwBufferBytes < DSBSIZE_MIN) ||
539 (format.dwBufferBytes > DSBSIZE_MAX) ) {
540 SDL_SetError("Sound buffer size must be between %d and %d",
541 DSBSIZE_MIN/numchunks, DSBSIZE_MAX/numchunks);
542 return(-1);
543 }
544 format.dwReserved = 0;
545 format.lpwfxFormat = wavefmt;
546 result = IDirectSound_CreateSoundBuffer(sndObj, &format, sndbuf, NULL);
547 if ( result != DS_OK ) {
548 SetDSerror("DirectSound CreateSoundBuffer", result);
549 return(-1);
550 }
551 IDirectSoundBuffer_SetFormat(*sndbuf, wavefmt);
552
553 /* Silence the initial audio buffer */
554 result = IDirectSoundBuffer_Lock(*sndbuf, 0, format.dwBufferBytes,
555 (LPVOID *)&pvAudioPtr1, &dwAudioBytes1,
556 (LPVOID *)&pvAudioPtr2, &dwAudioBytes2,
557 DSBLOCK_ENTIREBUFFER);
558 if ( result == DS_OK ) {
559 if ( wavefmt->wBitsPerSample == 8 ) {
560 SDL_memset(pvAudioPtr1, 0x80, dwAudioBytes1);
561 } else {
562 SDL_memset(pvAudioPtr1, 0x00, dwAudioBytes1);
563 }
564 IDirectSoundBuffer_Unlock(*sndbuf,
565 (LPVOID)pvAudioPtr1, dwAudioBytes1,
566 (LPVOID)pvAudioPtr2, dwAudioBytes2);
567 }
568
569 /* We're ready to go */
570 return(numchunks);
571}
572
573/* This function tries to set position notify events on the mixing buffer */
574#ifdef USE_POSITION_NOTIFY
575static int CreateAudioEvent(_THIS)
576{
577 LPDIRECTSOUNDNOTIFY notify;
578 DSBPOSITIONNOTIFY *notify_positions;
579 int i, retval;
580 HRESULT result;
581
582 /* Default to fail on exit */
583 retval = -1;
584 notify = NULL;
585
586 /* Query for the interface */
587 result = IDirectSoundBuffer_QueryInterface(mixbuf,
588 &IID_IDirectSoundNotify, (void *)&notify);
589 if ( result != DS_OK ) {
590 goto done;
591 }
592
593 /* Allocate the notify structures */
594 notify_positions = (DSBPOSITIONNOTIFY *)SDL_malloc(NUM_BUFFERS*
595 sizeof(*notify_positions));
596 if ( notify_positions == NULL ) {
597 goto done;
598 }
599
600 /* Create the notify event */
601 audio_event = CreateEvent(NULL, FALSE, FALSE, NULL);
602 if ( audio_event == NULL ) {
603 goto done;
604 }
605
606 /* Set up the notify structures */
607 for ( i=0; i<NUM_BUFFERS; ++i ) {
608 notify_positions[i].dwOffset = i*mixlen;
609 notify_positions[i].hEventNotify = audio_event;
610 }
611 result = IDirectSoundNotify_SetNotificationPositions(notify,
612 NUM_BUFFERS, notify_positions);
613 if ( result == DS_OK ) {
614 retval = 0;
615 }
616done:
617 if ( notify != NULL ) {
618 IDirectSoundNotify_Release(notify);
619 }
620 return(retval);
621}
622#endif /* USE_POSITION_NOTIFY */
623
624static int DX5_OpenAudio(_THIS, SDL_AudioSpec *spec)
625{
626 HRESULT result;
627 WAVEFORMATEX waveformat;
628
629 /* Set basic WAVE format parameters */
630 SDL_memset(&waveformat, 0, sizeof(waveformat));
631 waveformat.wFormatTag = WAVE_FORMAT_PCM;
632
633 /* Determine the audio parameters from the AudioSpec */
634 switch ( spec->format & 0xFF ) {
635 case 8:
636 /* Unsigned 8 bit audio data */
637 spec->format = AUDIO_U8;
638 silence = 0x80;
639 waveformat.wBitsPerSample = 8;
640 break;
641 case 16:
642 /* Signed 16 bit audio data */
643 spec->format = AUDIO_S16;
644 silence = 0x00;
645 waveformat.wBitsPerSample = 16;
646 break;
647 default:
648 SDL_SetError("Unsupported audio format");
649 return(-1);
650 }
651 waveformat.nChannels = spec->channels;
652 waveformat.nSamplesPerSec = spec->freq;
653 waveformat.nBlockAlign =
654 waveformat.nChannels * (waveformat.wBitsPerSample/8);
655 waveformat.nAvgBytesPerSec =
656 waveformat.nSamplesPerSec * waveformat.nBlockAlign;
657
658 /* Update the fragment size as size in bytes */
659 SDL_CalculateAudioSpec(spec);
660
661 /* Open the audio device */
662 result = DSoundCreate(NULL, &sound, NULL);
663 if ( result != DS_OK ) {
664 SetDSerror("DirectSoundCreate", result);
665 return(-1);
666 }
667
668 /* Create the audio buffer to which we write */
669 NUM_BUFFERS = -1;
670#ifdef USE_PRIMARY_BUFFER
671 if ( mainwin ) {
672 NUM_BUFFERS = CreatePrimary(sound, mainwin, &mixbuf,
673 &waveformat, spec->size);
674 }
675#endif /* USE_PRIMARY_BUFFER */
676 if ( NUM_BUFFERS < 0 ) {
677 NUM_BUFFERS = CreateSecondary(sound, mainwin, &mixbuf,
678 &waveformat, spec->size);
679 if ( NUM_BUFFERS < 0 ) {
680 return(-1);
681 }
682#ifdef DEBUG_SOUND
683 fprintf(stderr, "Using secondary audio buffer\n");
684#endif
685 }
686#ifdef DEBUG_SOUND
687 else
688 fprintf(stderr, "Using primary audio buffer\n");
689#endif
690
691 /* The buffer will auto-start playing in DX5_WaitAudio() */
692 lastchunk = 0;
693 mixlen = spec->size;
694
695#ifdef USE_POSITION_NOTIFY
696 /* See if we can use DirectX 6 event notification */
697 if ( CreateAudioEvent(this) == 0 ) {
698 this->WaitAudio = DX6_WaitAudio_EventWait;
699 } else {
700 this->WaitAudio = DX5_WaitAudio_BusyWait;
701 }
702#endif
703 return(0);
704}
705
SDL with some OMAP hardware support