Mercurial > sdl-ios-xcode
annotate src/audio/windx5/SDL_dx5audio.c @ 1870:39a4f91b164a
Fixed bug #256
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Wed, 21 Jun 2006 07:35:02 +0000 |
| parents | d910939febfa |
| children | 782fd950bd46 9b02a5b97f79 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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3 Copyright (C) 1997-2006 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
|
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6 modify it under the terms of the GNU Lesser General Public |
| 0 | 7 License as published by the Free Software Foundation; either |
|
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8 version 2.1 of the License, or (at your option) any later version. |
| 0 | 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 | |
|
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13 Lesser General Public License for more details. |
| 0 | 14 |
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15 You should have received a copy of the GNU Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 0 | 18 |
| 19 Sam Lantinga | |
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20 slouken@libsdl.org |
| 0 | 21 */ |
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22 #include "SDL_config.h" |
| 0 | 23 |
| 24 /* Allow access to a raw mixing buffer */ | |
| 25 | |
| 26 #include "SDL_timer.h" | |
| 27 #include "SDL_audio.h" | |
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28 #include "../SDL_audio_c.h" |
| 0 | 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 */ | |
| 35 HRESULT (WINAPI *DSoundCreate)(LPGUID, LPDIRECTSOUND *, LPUNKNOWN); | |
| 36 | |
| 37 /* Audio driver functions */ | |
| 38 static int DX5_OpenAudio(_THIS, SDL_AudioSpec *spec); | |
| 39 static void DX5_ThreadInit(_THIS); | |
| 40 static void DX5_WaitAudio_BusyWait(_THIS); | |
| 41 #ifdef USE_POSITION_NOTIFY | |
| 42 static void DX6_WaitAudio_EventWait(_THIS); | |
| 43 #endif | |
| 44 static void DX5_PlayAudio(_THIS); | |
| 45 static Uint8 *DX5_GetAudioBuf(_THIS); | |
| 46 static void DX5_WaitDone(_THIS); | |
| 47 static void DX5_CloseAudio(_THIS); | |
| 48 | |
| 49 /* Audio driver bootstrap functions */ | |
| 50 | |
| 51 static 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; | |
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58 DSoundDLL = LoadLibrary(TEXT("DSOUND.DLL")); |
| 0 | 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 */ | |
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90 if (!GetProcAddress(DSoundDLL, TEXT("DirectSoundCaptureCreate"))) |
| 0 | 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 */ | |
| 101 static HINSTANCE DSoundDLL = NULL; | |
| 102 | |
| 103 static void DX5_Unload(void) | |
| 104 { | |
| 105 if ( DSoundDLL != NULL ) { | |
| 106 FreeLibrary(DSoundDLL); | |
| 107 DSoundCreate = NULL; | |
| 108 DSoundDLL = NULL; | |
| 109 } | |
| 110 } | |
| 111 static int DX5_Load(void) | |
| 112 { | |
| 113 int status; | |
| 114 | |
| 115 DX5_Unload(); | |
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116 DSoundDLL = LoadLibrary(TEXT("DSOUND.DLL")); |
| 0 | 117 if ( DSoundDLL != NULL ) { |
| 118 DSoundCreate = (void *)GetProcAddress(DSoundDLL, | |
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119 TEXT("DirectSoundCreate")); |
| 0 | 120 } |
| 121 if ( DSoundDLL && DSoundCreate ) { | |
| 122 status = 0; | |
| 123 } else { | |
| 124 DX5_Unload(); | |
| 125 status = -1; | |
| 126 } | |
| 127 return status; | |
| 128 } | |
| 129 | |
| 130 static void Audio_DeleteDevice(SDL_AudioDevice *device) | |
| 131 { | |
| 132 DX5_Unload(); | |
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133 SDL_free(device->hidden); |
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134 SDL_free(device); |
| 0 | 135 } |
| 136 | |
| 137 static 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 */ | |
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147 this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice)); |
| 0 | 148 if ( this ) { |
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149 SDL_memset(this, 0, (sizeof *this)); |
| 0 | 150 this->hidden = (struct SDL_PrivateAudioData *) |
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151 SDL_malloc((sizeof *this->hidden)); |
| 0 | 152 } |
| 153 if ( (this == NULL) || (this->hidden == NULL) ) { | |
| 154 SDL_OutOfMemory(); | |
| 155 if ( this ) { | |
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156 SDL_free(this); |
| 0 | 157 } |
| 158 return(0); | |
| 159 } | |
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160 SDL_memset(this->hidden, 0, (sizeof *this->hidden)); |
| 0 | 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 | |
| 176 AudioBootStrap DSOUND_bootstrap = { | |
| 177 "dsound", "Win95/98/2000 DirectSound", | |
| 178 Audio_Available, Audio_CreateDevice | |
| 179 }; | |
| 180 | |
| 181 static void SetDSerror(const char *function, int code) | |
| 182 { | |
| 183 static const char *error; | |
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184 static char errbuf[1024]; |
| 0 | 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: | |
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223 SDL_snprintf(errbuf, SDL_arraysize(errbuf), |
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224 "%s: Unknown DirectSound error: 0x%x", |
| 0 | 225 function, code); |
| 226 break; | |
| 227 } | |
| 228 if ( ! errbuf[0] ) { | |
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229 SDL_snprintf(errbuf, SDL_arraysize(errbuf), "%s: %s", function, error); |
| 0 | 230 } |
| 231 SDL_SetError("%s", errbuf); | |
| 232 return; | |
| 233 } | |
| 234 | |
| 235 /* DirectSound needs to be associated with a window */ | |
| 236 static HWND mainwin = NULL; | |
| 237 /* */ | |
| 238 void DX5_SoundFocus(HWND hwnd) | |
| 239 { | |
| 240 mainwin = hwnd; | |
| 241 } | |
| 242 | |
| 243 static void DX5_ThreadInit(_THIS) | |
| 244 { | |
| 245 SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_HIGHEST); | |
| 246 } | |
| 247 | |
| 248 static 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, &cursor, &junk); | |
| 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 cursor /= mixlen; | |
| 268 | |
| 269 while ( cursor == playing ) { | |
| 270 /* FIXME: find out how much time is left and sleep that long */ | |
| 271 SDL_Delay(10); | |
| 272 | |
| 273 /* Try to restore a lost sound buffer */ | |
| 274 IDirectSoundBuffer_GetStatus(mixbuf, &status); | |
| 275 if ( (status&DSBSTATUS_BUFFERLOST) ) { | |
| 276 IDirectSoundBuffer_Restore(mixbuf); | |
| 277 IDirectSoundBuffer_GetStatus(mixbuf, &status); | |
| 278 if ( (status&DSBSTATUS_BUFFERLOST) ) { | |
| 279 break; | |
| 280 } | |
| 281 } | |
| 282 if ( ! (status&DSBSTATUS_PLAYING) ) { | |
| 283 result = IDirectSoundBuffer_Play(mixbuf, 0, 0, DSBPLAY_LOOPING); | |
| 284 if ( result == DS_OK ) { | |
| 285 continue; | |
| 286 } | |
| 287 #ifdef DEBUG_SOUND | |
| 288 SetDSerror("DirectSound Play", result); | |
| 289 #endif | |
| 290 return; | |
| 291 } | |
| 292 | |
| 293 /* Find out where we are playing */ | |
| 294 result = IDirectSoundBuffer_GetCurrentPosition(mixbuf, | |
| 295 &cursor, &junk); | |
| 296 if ( result != DS_OK ) { | |
| 297 SetDSerror("DirectSound GetCurrentPosition", result); | |
| 298 return; | |
| 299 } | |
| 300 cursor /= mixlen; | |
| 301 } | |
| 302 } | |
| 303 | |
| 304 #ifdef USE_POSITION_NOTIFY | |
| 305 static void DX6_WaitAudio_EventWait(_THIS) | |
| 306 { | |
| 307 DWORD status; | |
| 308 HRESULT result; | |
| 309 | |
| 310 /* Try to restore a lost sound buffer */ | |
| 311 IDirectSoundBuffer_GetStatus(mixbuf, &status); | |
| 312 if ( (status&DSBSTATUS_BUFFERLOST) ) { | |
| 313 IDirectSoundBuffer_Restore(mixbuf); | |
| 314 IDirectSoundBuffer_GetStatus(mixbuf, &status); | |
| 315 if ( (status&DSBSTATUS_BUFFERLOST) ) { | |
| 316 return; | |
| 317 } | |
| 318 } | |
| 319 if ( ! (status&DSBSTATUS_PLAYING) ) { | |
| 320 result = IDirectSoundBuffer_Play(mixbuf, 0, 0, DSBPLAY_LOOPING); | |
| 321 if ( result != DS_OK ) { | |
| 322 #ifdef DEBUG_SOUND | |
| 323 SetDSerror("DirectSound Play", result); | |
| 324 #endif | |
| 325 return; | |
| 326 } | |
| 327 } | |
| 328 WaitForSingleObject(audio_event, INFINITE); | |
| 329 } | |
| 330 #endif /* USE_POSITION_NOTIFY */ | |
| 331 | |
| 332 static void DX5_PlayAudio(_THIS) | |
| 333 { | |
| 334 /* Unlock the buffer, allowing it to play */ | |
| 335 if ( locked_buf ) { | |
| 336 IDirectSoundBuffer_Unlock(mixbuf, locked_buf, mixlen, NULL, 0); | |
| 337 } | |
| 338 | |
| 339 } | |
| 340 | |
| 341 static Uint8 *DX5_GetAudioBuf(_THIS) | |
| 342 { | |
| 343 DWORD cursor, junk; | |
| 344 HRESULT result; | |
| 345 DWORD rawlen; | |
| 346 | |
| 347 /* Figure out which blocks to fill next */ | |
| 348 locked_buf = NULL; | |
| 349 result = IDirectSoundBuffer_GetCurrentPosition(mixbuf, &cursor, &junk); | |
| 350 if ( result == DSERR_BUFFERLOST ) { | |
| 351 IDirectSoundBuffer_Restore(mixbuf); | |
| 352 result = IDirectSoundBuffer_GetCurrentPosition(mixbuf, | |
| 353 &cursor, &junk); | |
| 354 } | |
| 355 if ( result != DS_OK ) { | |
| 356 SetDSerror("DirectSound GetCurrentPosition", result); | |
| 357 return(NULL); | |
| 358 } | |
| 359 cursor /= mixlen; | |
| 360 playing = cursor; | |
| 361 cursor = (cursor+1)%NUM_BUFFERS; | |
| 362 cursor *= mixlen; | |
| 363 | |
| 364 /* Lock the audio buffer */ | |
| 365 result = IDirectSoundBuffer_Lock(mixbuf, cursor, mixlen, | |
| 366 (LPVOID *)&locked_buf, &rawlen, NULL, &junk, 0); | |
| 367 if ( result == DSERR_BUFFERLOST ) { | |
| 368 IDirectSoundBuffer_Restore(mixbuf); | |
| 369 result = IDirectSoundBuffer_Lock(mixbuf, cursor, mixlen, | |
| 370 (LPVOID *)&locked_buf, &rawlen, NULL, &junk, 0); | |
| 371 } | |
| 372 if ( result != DS_OK ) { | |
| 373 SetDSerror("DirectSound Lock", result); | |
| 374 return(NULL); | |
| 375 } | |
| 376 return(locked_buf); | |
| 377 } | |
| 378 | |
| 379 static void DX5_WaitDone(_THIS) | |
| 380 { | |
| 381 Uint8 *stream; | |
| 382 | |
| 383 /* Wait for the playing chunk to finish */ | |
| 384 stream = this->GetAudioBuf(this); | |
| 385 if ( stream != NULL ) { | |
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386 SDL_memset(stream, silence, mixlen); |
| 0 | 387 this->PlayAudio(this); |
| 388 } | |
| 389 this->WaitAudio(this); | |
| 390 | |
| 391 /* Stop the looping sound buffer */ | |
| 392 IDirectSoundBuffer_Stop(mixbuf); | |
| 393 } | |
| 394 | |
| 395 static void DX5_CloseAudio(_THIS) | |
| 396 { | |
| 397 if ( sound != NULL ) { | |
| 398 if ( mixbuf != NULL ) { | |
| 399 /* Clean up the audio buffer */ | |
| 400 IDirectSoundBuffer_Release(mixbuf); | |
| 401 mixbuf = NULL; | |
| 402 } | |
| 403 if ( audio_event != NULL ) { | |
| 404 CloseHandle(audio_event); | |
| 405 audio_event = NULL; | |
| 406 } | |
| 407 IDirectSound_Release(sound); | |
| 408 sound = NULL; | |
| 409 } | |
| 410 } | |
| 411 | |
| 469 | 412 #ifdef USE_PRIMARY_BUFFER |
| 0 | 413 /* This function tries to create a primary audio buffer, and returns the |
| 414 number of audio chunks available in the created buffer. | |
| 415 */ | |
| 416 static int CreatePrimary(LPDIRECTSOUND sndObj, HWND focus, | |
| 417 LPDIRECTSOUNDBUFFER *sndbuf, WAVEFORMATEX *wavefmt, Uint32 chunksize) | |
| 418 { | |
| 419 HRESULT result; | |
| 420 DSBUFFERDESC format; | |
| 421 DSBCAPS caps; | |
| 422 int numchunks; | |
| 423 | |
| 424 /* Try to set primary mixing privileges */ | |
| 425 result = IDirectSound_SetCooperativeLevel(sndObj, focus, | |
| 426 DSSCL_WRITEPRIMARY); | |
| 427 if ( result != DS_OK ) { | |
| 428 #ifdef DEBUG_SOUND | |
| 429 SetDSerror("DirectSound SetCooperativeLevel", result); | |
| 430 #endif | |
| 431 return(-1); | |
| 432 } | |
| 433 | |
| 434 /* Try to create the primary buffer */ | |
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435 SDL_memset(&format, 0, sizeof(format)); |
| 0 | 436 format.dwSize = sizeof(format); |
| 437 format.dwFlags=(DSBCAPS_PRIMARYBUFFER|DSBCAPS_GETCURRENTPOSITION2); | |
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438 format.dwFlags |= DSBCAPS_STICKYFOCUS; |
| 0 | 439 #ifdef USE_POSITION_NOTIFY |
| 440 format.dwFlags |= DSBCAPS_CTRLPOSITIONNOTIFY; | |
| 441 #endif | |
| 442 result = IDirectSound_CreateSoundBuffer(sndObj, &format, sndbuf, NULL); | |
| 443 if ( result != DS_OK ) { | |
| 444 #ifdef DEBUG_SOUND | |
| 445 SetDSerror("DirectSound CreateSoundBuffer", result); | |
| 446 #endif | |
| 447 return(-1); | |
| 448 } | |
| 449 | |
| 450 /* Check the size of the fragment buffer */ | |
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451 SDL_memset(&caps, 0, sizeof(caps)); |
| 0 | 452 caps.dwSize = sizeof(caps); |
| 453 result = IDirectSoundBuffer_GetCaps(*sndbuf, &caps); | |
| 454 if ( result != DS_OK ) { | |
| 455 #ifdef DEBUG_SOUND | |
| 456 SetDSerror("DirectSound GetCaps", result); | |
| 457 #endif | |
| 458 IDirectSoundBuffer_Release(*sndbuf); | |
| 459 return(-1); | |
| 460 } | |
| 461 if ( (chunksize > caps.dwBufferBytes) || | |
| 462 ((caps.dwBufferBytes%chunksize) != 0) ) { | |
| 463 /* The primary buffer size is not a multiple of 'chunksize' | |
| 464 -- this hopefully doesn't happen when 'chunksize' is a | |
| 465 power of 2. | |
| 466 */ | |
| 467 IDirectSoundBuffer_Release(*sndbuf); | |
| 468 SDL_SetError( | |
| 469 "Primary buffer size is: %d, cannot break it into chunks of %d bytes\n", | |
| 470 caps.dwBufferBytes, chunksize); | |
| 471 return(-1); | |
| 472 } | |
| 473 numchunks = (caps.dwBufferBytes/chunksize); | |
| 474 | |
| 475 /* Set the primary audio format */ | |
| 476 result = IDirectSoundBuffer_SetFormat(*sndbuf, wavefmt); | |
| 477 if ( result != DS_OK ) { | |
| 478 #ifdef DEBUG_SOUND | |
| 479 SetDSerror("DirectSound SetFormat", result); | |
| 480 #endif | |
| 481 IDirectSoundBuffer_Release(*sndbuf); | |
| 482 return(-1); | |
| 483 } | |
| 484 return(numchunks); | |
| 485 } | |
| 469 | 486 #endif /* USE_PRIMARY_BUFFER */ |
| 0 | 487 |
| 488 /* This function tries to create a secondary audio buffer, and returns the | |
| 489 number of audio chunks available in the created buffer. | |
| 490 */ | |
| 491 static int CreateSecondary(LPDIRECTSOUND sndObj, HWND focus, | |
| 492 LPDIRECTSOUNDBUFFER *sndbuf, WAVEFORMATEX *wavefmt, Uint32 chunksize) | |
| 493 { | |
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494 const int numchunks = 2; |
| 0 | 495 HRESULT result; |
| 496 DSBUFFERDESC format; | |
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497 LPVOID pvAudioPtr1, pvAudioPtr2; |
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498 DWORD dwAudioBytes1, dwAudioBytes2; |
| 0 | 499 |
| 500 /* Try to set primary mixing privileges */ | |
| 501 if ( focus ) { | |
| 502 result = IDirectSound_SetCooperativeLevel(sndObj, | |
| 503 focus, DSSCL_PRIORITY); | |
| 504 } else { | |
| 505 result = IDirectSound_SetCooperativeLevel(sndObj, | |
| 506 GetDesktopWindow(), DSSCL_NORMAL); | |
| 507 } | |
| 508 if ( result != DS_OK ) { | |
| 509 #ifdef DEBUG_SOUND | |
| 510 SetDSerror("DirectSound SetCooperativeLevel", result); | |
| 511 #endif | |
| 512 return(-1); | |
| 513 } | |
| 514 | |
| 515 /* Try to create the secondary buffer */ | |
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516 SDL_memset(&format, 0, sizeof(format)); |
| 0 | 517 format.dwSize = sizeof(format); |
| 518 format.dwFlags = DSBCAPS_GETCURRENTPOSITION2; | |
| 519 #ifdef USE_POSITION_NOTIFY | |
| 520 format.dwFlags |= DSBCAPS_CTRLPOSITIONNOTIFY; | |
| 521 #endif | |
| 522 if ( ! focus ) { | |
| 523 format.dwFlags |= DSBCAPS_GLOBALFOCUS; | |
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524 } else { |
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525 format.dwFlags |= DSBCAPS_STICKYFOCUS; |
| 0 | 526 } |
| 527 format.dwBufferBytes = numchunks*chunksize; | |
| 528 if ( (format.dwBufferBytes < DSBSIZE_MIN) || | |
| 529 (format.dwBufferBytes > DSBSIZE_MAX) ) { | |
| 530 SDL_SetError("Sound buffer size must be between %d and %d", | |
| 531 DSBSIZE_MIN/numchunks, DSBSIZE_MAX/numchunks); | |
| 532 return(-1); | |
| 533 } | |
| 534 format.dwReserved = 0; | |
| 535 format.lpwfxFormat = wavefmt; | |
| 536 result = IDirectSound_CreateSoundBuffer(sndObj, &format, sndbuf, NULL); | |
| 537 if ( result != DS_OK ) { | |
| 538 SetDSerror("DirectSound CreateSoundBuffer", result); | |
| 539 return(-1); | |
| 540 } | |
| 541 IDirectSoundBuffer_SetFormat(*sndbuf, wavefmt); | |
| 542 | |
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543 /* Silence the initial audio buffer */ |
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544 result = IDirectSoundBuffer_Lock(*sndbuf, 0, format.dwBufferBytes, |
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545 (LPVOID *)&pvAudioPtr1, &dwAudioBytes1, |
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546 (LPVOID *)&pvAudioPtr2, &dwAudioBytes2, |
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547 DSBLOCK_ENTIREBUFFER); |
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548 if ( result == DS_OK ) { |
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549 if ( wavefmt->wBitsPerSample == 8 ) { |
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550 SDL_memset(pvAudioPtr1, 0x80, dwAudioBytes1); |
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551 } else { |
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552 SDL_memset(pvAudioPtr1, 0x00, dwAudioBytes1); |
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553 } |
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554 IDirectSoundBuffer_Unlock(*sndbuf, |
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555 (LPVOID)pvAudioPtr1, dwAudioBytes1, |
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556 (LPVOID)pvAudioPtr2, dwAudioBytes2); |
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557 } |
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558 |
| 0 | 559 /* We're ready to go */ |
| 560 return(numchunks); | |
| 561 } | |
| 562 | |
| 563 /* This function tries to set position notify events on the mixing buffer */ | |
| 564 #ifdef USE_POSITION_NOTIFY | |
| 565 static int CreateAudioEvent(_THIS) | |
| 566 { | |
| 567 LPDIRECTSOUNDNOTIFY notify; | |
| 568 DSBPOSITIONNOTIFY *notify_positions; | |
| 569 int i, retval; | |
| 570 HRESULT result; | |
| 571 | |
| 572 /* Default to fail on exit */ | |
| 573 retval = -1; | |
| 574 notify = NULL; | |
| 575 | |
| 576 /* Query for the interface */ | |
| 577 result = IDirectSoundBuffer_QueryInterface(mixbuf, | |
| 578 &IID_IDirectSoundNotify, (void *)¬ify); | |
| 579 if ( result != DS_OK ) { | |
| 580 goto done; | |
| 581 } | |
| 582 | |
| 583 /* Allocate the notify structures */ | |
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584 notify_positions = (DSBPOSITIONNOTIFY *)SDL_malloc(NUM_BUFFERS* |
| 0 | 585 sizeof(*notify_positions)); |
| 586 if ( notify_positions == NULL ) { | |
| 587 goto done; | |
| 588 } | |
| 589 | |
| 590 /* Create the notify event */ | |
| 591 audio_event = CreateEvent(NULL, FALSE, FALSE, NULL); | |
| 592 if ( audio_event == NULL ) { | |
| 593 goto done; | |
| 594 } | |
| 595 | |
| 596 /* Set up the notify structures */ | |
| 597 for ( i=0; i<NUM_BUFFERS; ++i ) { | |
| 598 notify_positions[i].dwOffset = i*mixlen; | |
| 599 notify_positions[i].hEventNotify = audio_event; | |
| 600 } | |
| 601 result = IDirectSoundNotify_SetNotificationPositions(notify, | |
| 602 NUM_BUFFERS, notify_positions); | |
| 603 if ( result == DS_OK ) { | |
| 604 retval = 0; | |
| 605 } | |
| 606 done: | |
| 607 if ( notify != NULL ) { | |
| 608 IDirectSoundNotify_Release(notify); | |
| 609 } | |
| 610 return(retval); | |
| 611 } | |
| 612 #endif /* USE_POSITION_NOTIFY */ | |
| 613 | |
| 614 static int DX5_OpenAudio(_THIS, SDL_AudioSpec *spec) | |
| 615 { | |
| 616 HRESULT result; | |
| 617 WAVEFORMATEX waveformat; | |
| 618 | |
| 619 /* Set basic WAVE format parameters */ | |
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620 SDL_memset(&waveformat, 0, sizeof(waveformat)); |
| 0 | 621 waveformat.wFormatTag = WAVE_FORMAT_PCM; |
| 622 | |
| 623 /* Determine the audio parameters from the AudioSpec */ | |
| 624 switch ( spec->format & 0xFF ) { | |
| 625 case 8: | |
| 626 /* Unsigned 8 bit audio data */ | |
| 627 spec->format = AUDIO_U8; | |
| 628 silence = 0x80; | |
| 629 waveformat.wBitsPerSample = 8; | |
| 630 break; | |
| 631 case 16: | |
| 632 /* Signed 16 bit audio data */ | |
| 633 spec->format = AUDIO_S16; | |
| 634 silence = 0x00; | |
| 635 waveformat.wBitsPerSample = 16; | |
| 636 break; | |
| 637 default: | |
| 638 SDL_SetError("Unsupported audio format"); | |
| 639 return(-1); | |
| 640 } | |
| 641 waveformat.nChannels = spec->channels; | |
| 642 waveformat.nSamplesPerSec = spec->freq; | |
| 643 waveformat.nBlockAlign = | |
| 644 waveformat.nChannels * (waveformat.wBitsPerSample/8); | |
| 645 waveformat.nAvgBytesPerSec = | |
| 646 waveformat.nSamplesPerSec * waveformat.nBlockAlign; | |
| 647 | |
| 648 /* Update the fragment size as size in bytes */ | |
| 649 SDL_CalculateAudioSpec(spec); | |
| 650 | |
| 651 /* Open the audio device */ | |
| 652 result = DSoundCreate(NULL, &sound, NULL); | |
| 653 if ( result != DS_OK ) { | |
| 654 SetDSerror("DirectSoundCreate", result); | |
| 655 return(-1); | |
| 656 } | |
| 657 | |
| 658 /* Create the audio buffer to which we write */ | |
| 659 NUM_BUFFERS = -1; | |
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660 #ifdef USE_PRIMARY_BUFFER |
| 0 | 661 if ( mainwin ) { |
| 662 NUM_BUFFERS = CreatePrimary(sound, mainwin, &mixbuf, | |
| 663 &waveformat, spec->size); | |
| 664 } | |
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665 #endif /* USE_PRIMARY_BUFFER */ |
| 0 | 666 if ( NUM_BUFFERS < 0 ) { |
| 667 NUM_BUFFERS = CreateSecondary(sound, mainwin, &mixbuf, | |
| 668 &waveformat, spec->size); | |
| 669 if ( NUM_BUFFERS < 0 ) { | |
| 670 return(-1); | |
| 671 } | |
| 672 #ifdef DEBUG_SOUND | |
| 673 fprintf(stderr, "Using secondary audio buffer\n"); | |
| 674 #endif | |
| 675 } | |
| 676 #ifdef DEBUG_SOUND | |
| 677 else | |
| 678 fprintf(stderr, "Using primary audio buffer\n"); | |
| 679 #endif | |
| 680 | |
| 681 /* The buffer will auto-start playing in DX5_WaitAudio() */ | |
| 682 playing = 0; | |
| 683 mixlen = spec->size; | |
| 684 | |
| 685 #ifdef USE_POSITION_NOTIFY | |
| 686 /* See if we can use DirectX 6 event notification */ | |
| 687 if ( CreateAudioEvent(this) == 0 ) { | |
| 688 this->WaitAudio = DX6_WaitAudio_EventWait; | |
| 689 } else { | |
| 690 this->WaitAudio = DX5_WaitAudio_BusyWait; | |
| 691 } | |
| 692 #endif | |
| 693 return(0); | |
| 694 } | |
| 695 |