Mercurial > sdl-ios-xcode
annotate src/audio/windx5/SDL_dx5audio.c @ 1358:c71e05b4dc2e
More header massaging... works great on Windows. ;-)
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Fri, 10 Feb 2006 06:48:43 +0000 |
| parents | 604d73db6802 |
| children | 19418e4422cb |
| 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 */ |
| 22 | |
| 23 /* Allow access to a raw mixing buffer */ | |
| 24 | |
| 25 #include "SDL_timer.h" | |
| 26 #include "SDL_audio.h" | |
| 27 #include "SDL_audio_c.h" | |
| 28 #include "SDL_dx5audio.h" | |
| 29 | |
| 30 /* Define this if you want to use DirectX 6 DirectSoundNotify interface */ | |
| 31 //#define USE_POSITION_NOTIFY | |
| 32 | |
| 33 /* DirectX function pointers for audio */ | |
| 34 HRESULT (WINAPI *DSoundCreate)(LPGUID, LPDIRECTSOUND *, LPUNKNOWN); | |
| 35 | |
| 36 /* Audio driver functions */ | |
| 37 static int DX5_OpenAudio(_THIS, SDL_AudioSpec *spec); | |
| 38 static void DX5_ThreadInit(_THIS); | |
| 39 static void DX5_WaitAudio_BusyWait(_THIS); | |
| 40 #ifdef USE_POSITION_NOTIFY | |
| 41 static void DX6_WaitAudio_EventWait(_THIS); | |
| 42 #endif | |
| 43 static void DX5_PlayAudio(_THIS); | |
| 44 static Uint8 *DX5_GetAudioBuf(_THIS); | |
| 45 static void DX5_WaitDone(_THIS); | |
| 46 static void DX5_CloseAudio(_THIS); | |
| 47 | |
| 48 /* Audio driver bootstrap functions */ | |
| 49 | |
| 50 static int Audio_Available(void) | |
| 51 { | |
| 52 HINSTANCE DSoundDLL; | |
| 53 int dsound_ok; | |
| 54 | |
| 55 /* Version check DSOUND.DLL (Is DirectX okay?) */ | |
| 56 dsound_ok = 0; | |
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57 DSoundDLL = LoadLibrary(TEXT("DSOUND.DLL")); |
| 0 | 58 if ( DSoundDLL != NULL ) { |
| 59 /* We just use basic DirectSound, we're okay */ | |
| 60 /* Yay! */ | |
| 61 /* Unfortunately, the sound drivers on NT have | |
| 62 higher latencies than the audio buffers used | |
| 63 by many SDL applications, so there are gaps | |
| 64 in the audio - it sounds terrible. Punt for now. | |
| 65 */ | |
| 66 OSVERSIONINFO ver; | |
| 67 ver.dwOSVersionInfoSize = sizeof (OSVERSIONINFO); | |
| 68 GetVersionEx(&ver); | |
| 69 switch (ver.dwPlatformId) { | |
| 70 case VER_PLATFORM_WIN32_NT: | |
| 71 if ( ver.dwMajorVersion > 4 ) { | |
| 72 /* Win2K */ | |
| 73 dsound_ok = 1; | |
| 74 } else { | |
| 75 /* WinNT */ | |
| 76 dsound_ok = 0; | |
| 77 } | |
| 78 break; | |
| 79 default: | |
| 80 /* Win95 or Win98 */ | |
| 81 dsound_ok = 1; | |
| 82 break; | |
| 83 } | |
| 84 /* Now check for DirectX 5 or better - otherwise | |
| 85 * we will fail later in DX5_OpenAudio without a chance | |
| 86 * to fall back to the DIB driver. */ | |
| 87 if (dsound_ok) { | |
| 88 /* DirectSoundCaptureCreate was added in DX5 */ | |
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89 if (!GetProcAddress(DSoundDLL, TEXT("DirectSoundCaptureCreate"))) |
| 0 | 90 dsound_ok = 0; |
| 91 | |
| 92 } | |
| 93 /* Clean up.. */ | |
| 94 FreeLibrary(DSoundDLL); | |
| 95 } | |
| 96 return(dsound_ok); | |
| 97 } | |
| 98 | |
| 99 /* Functions for loading the DirectX functions dynamically */ | |
| 100 static HINSTANCE DSoundDLL = NULL; | |
| 101 | |
| 102 static void DX5_Unload(void) | |
| 103 { | |
| 104 if ( DSoundDLL != NULL ) { | |
| 105 FreeLibrary(DSoundDLL); | |
| 106 DSoundCreate = NULL; | |
| 107 DSoundDLL = NULL; | |
| 108 } | |
| 109 } | |
| 110 static int DX5_Load(void) | |
| 111 { | |
| 112 int status; | |
| 113 | |
| 114 DX5_Unload(); | |
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115 DSoundDLL = LoadLibrary(TEXT("DSOUND.DLL")); |
| 0 | 116 if ( DSoundDLL != NULL ) { |
| 117 DSoundCreate = (void *)GetProcAddress(DSoundDLL, | |
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118 TEXT("DirectSoundCreate")); |
| 0 | 119 } |
| 120 if ( DSoundDLL && DSoundCreate ) { | |
| 121 status = 0; | |
| 122 } else { | |
| 123 DX5_Unload(); | |
| 124 status = -1; | |
| 125 } | |
| 126 return status; | |
| 127 } | |
| 128 | |
| 129 static void Audio_DeleteDevice(SDL_AudioDevice *device) | |
| 130 { | |
| 131 DX5_Unload(); | |
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132 SDL_free(device->hidden); |
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133 SDL_free(device); |
| 0 | 134 } |
| 135 | |
| 136 static SDL_AudioDevice *Audio_CreateDevice(int devindex) | |
| 137 { | |
| 138 SDL_AudioDevice *this; | |
| 139 | |
| 140 /* Load DirectX */ | |
| 141 if ( DX5_Load() < 0 ) { | |
| 142 return(NULL); | |
| 143 } | |
| 144 | |
| 145 /* Initialize all variables that we clean on shutdown */ | |
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146 this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice)); |
| 0 | 147 if ( this ) { |
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148 SDL_memset(this, 0, (sizeof *this)); |
| 0 | 149 this->hidden = (struct SDL_PrivateAudioData *) |
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150 SDL_malloc((sizeof *this->hidden)); |
| 0 | 151 } |
| 152 if ( (this == NULL) || (this->hidden == NULL) ) { | |
| 153 SDL_OutOfMemory(); | |
| 154 if ( this ) { | |
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155 SDL_free(this); |
| 0 | 156 } |
| 157 return(0); | |
| 158 } | |
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159 SDL_memset(this->hidden, 0, (sizeof *this->hidden)); |
| 0 | 160 |
| 161 /* Set the function pointers */ | |
| 162 this->OpenAudio = DX5_OpenAudio; | |
| 163 this->ThreadInit = DX5_ThreadInit; | |
| 164 this->WaitAudio = DX5_WaitAudio_BusyWait; | |
| 165 this->PlayAudio = DX5_PlayAudio; | |
| 166 this->GetAudioBuf = DX5_GetAudioBuf; | |
| 167 this->WaitDone = DX5_WaitDone; | |
| 168 this->CloseAudio = DX5_CloseAudio; | |
| 169 | |
| 170 this->free = Audio_DeleteDevice; | |
| 171 | |
| 172 return this; | |
| 173 } | |
| 174 | |
| 175 AudioBootStrap DSOUND_bootstrap = { | |
| 176 "dsound", "Win95/98/2000 DirectSound", | |
| 177 Audio_Available, Audio_CreateDevice | |
| 178 }; | |
| 179 | |
| 180 static void SetDSerror(const char *function, int code) | |
| 181 { | |
| 182 static const char *error; | |
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183 static char errbuf[1024]; |
| 0 | 184 |
| 185 errbuf[0] = 0; | |
| 186 switch (code) { | |
| 187 case E_NOINTERFACE: | |
| 188 error = | |
| 189 "Unsupported interface\n-- Is DirectX 5.0 or later installed?"; | |
| 190 break; | |
| 191 case DSERR_ALLOCATED: | |
| 192 error = "Audio device in use"; | |
| 193 break; | |
| 194 case DSERR_BADFORMAT: | |
| 195 error = "Unsupported audio format"; | |
| 196 break; | |
| 197 case DSERR_BUFFERLOST: | |
| 198 error = "Mixing buffer was lost"; | |
| 199 break; | |
| 200 case DSERR_CONTROLUNAVAIL: | |
| 201 error = "Control requested is not available"; | |
| 202 break; | |
| 203 case DSERR_INVALIDCALL: | |
| 204 error = "Invalid call for the current state"; | |
| 205 break; | |
| 206 case DSERR_INVALIDPARAM: | |
| 207 error = "Invalid parameter"; | |
| 208 break; | |
| 209 case DSERR_NODRIVER: | |
| 210 error = "No audio device found"; | |
| 211 break; | |
| 212 case DSERR_OUTOFMEMORY: | |
| 213 error = "Out of memory"; | |
| 214 break; | |
| 215 case DSERR_PRIOLEVELNEEDED: | |
| 216 error = "Caller doesn't have priority"; | |
| 217 break; | |
| 218 case DSERR_UNSUPPORTED: | |
| 219 error = "Function not supported"; | |
| 220 break; | |
| 221 default: | |
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222 SDL_snprintf(errbuf, SDL_arraysize(errbuf), |
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223 "%s: Unknown DirectSound error: 0x%x", |
| 0 | 224 function, code); |
| 225 break; | |
| 226 } | |
| 227 if ( ! errbuf[0] ) { | |
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228 SDL_snprintf(errbuf, SDL_arraysize(errbuf), "%s: %s", function, error); |
| 0 | 229 } |
| 230 SDL_SetError("%s", errbuf); | |
| 231 return; | |
| 232 } | |
| 233 | |
| 234 /* DirectSound needs to be associated with a window */ | |
| 235 static HWND mainwin = NULL; | |
| 236 /* */ | |
| 237 void DX5_SoundFocus(HWND hwnd) | |
| 238 { | |
| 239 mainwin = hwnd; | |
| 240 } | |
| 241 | |
| 242 static void DX5_ThreadInit(_THIS) | |
| 243 { | |
| 244 SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_HIGHEST); | |
| 245 } | |
| 246 | |
| 247 static void DX5_WaitAudio_BusyWait(_THIS) | |
| 248 { | |
| 249 DWORD status; | |
| 250 DWORD cursor, junk; | |
| 251 HRESULT result; | |
| 252 | |
| 253 /* Semi-busy wait, since we have no way of getting play notification | |
| 254 on a primary mixing buffer located in hardware (DirectX 5.0) | |
| 255 */ | |
| 256 result = IDirectSoundBuffer_GetCurrentPosition(mixbuf, &cursor, &junk); | |
| 257 if ( result != DS_OK ) { | |
| 258 if ( result == DSERR_BUFFERLOST ) { | |
| 259 IDirectSoundBuffer_Restore(mixbuf); | |
| 260 } | |
| 261 #ifdef DEBUG_SOUND | |
| 262 SetDSerror("DirectSound GetCurrentPosition", result); | |
| 263 #endif | |
| 264 return; | |
| 265 } | |
| 266 cursor /= mixlen; | |
| 267 | |
| 268 while ( cursor == playing ) { | |
| 269 /* FIXME: find out how much time is left and sleep that long */ | |
| 270 SDL_Delay(10); | |
| 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 &cursor, &junk); | |
| 295 if ( result != DS_OK ) { | |
| 296 SetDSerror("DirectSound GetCurrentPosition", result); | |
| 297 return; | |
| 298 } | |
| 299 cursor /= mixlen; | |
| 300 } | |
| 301 } | |
| 302 | |
| 303 #ifdef USE_POSITION_NOTIFY | |
| 304 static void DX6_WaitAudio_EventWait(_THIS) | |
| 305 { | |
| 306 DWORD status; | |
| 307 HRESULT result; | |
| 308 | |
| 309 /* Try to restore a lost sound buffer */ | |
| 310 IDirectSoundBuffer_GetStatus(mixbuf, &status); | |
| 311 if ( (status&DSBSTATUS_BUFFERLOST) ) { | |
| 312 IDirectSoundBuffer_Restore(mixbuf); | |
| 313 IDirectSoundBuffer_GetStatus(mixbuf, &status); | |
| 314 if ( (status&DSBSTATUS_BUFFERLOST) ) { | |
| 315 return; | |
| 316 } | |
| 317 } | |
| 318 if ( ! (status&DSBSTATUS_PLAYING) ) { | |
| 319 result = IDirectSoundBuffer_Play(mixbuf, 0, 0, DSBPLAY_LOOPING); | |
| 320 if ( result != DS_OK ) { | |
| 321 #ifdef DEBUG_SOUND | |
| 322 SetDSerror("DirectSound Play", result); | |
| 323 #endif | |
| 324 return; | |
| 325 } | |
| 326 } | |
| 327 WaitForSingleObject(audio_event, INFINITE); | |
| 328 } | |
| 329 #endif /* USE_POSITION_NOTIFY */ | |
| 330 | |
| 331 static void DX5_PlayAudio(_THIS) | |
| 332 { | |
| 333 /* Unlock the buffer, allowing it to play */ | |
| 334 if ( locked_buf ) { | |
| 335 IDirectSoundBuffer_Unlock(mixbuf, locked_buf, mixlen, NULL, 0); | |
| 336 } | |
| 337 | |
| 338 } | |
| 339 | |
| 340 static Uint8 *DX5_GetAudioBuf(_THIS) | |
| 341 { | |
| 342 DWORD cursor, junk; | |
| 343 HRESULT result; | |
| 344 DWORD rawlen; | |
| 345 | |
| 346 /* Figure out which blocks to fill next */ | |
| 347 locked_buf = NULL; | |
| 348 result = IDirectSoundBuffer_GetCurrentPosition(mixbuf, &cursor, &junk); | |
| 349 if ( result == DSERR_BUFFERLOST ) { | |
| 350 IDirectSoundBuffer_Restore(mixbuf); | |
| 351 result = IDirectSoundBuffer_GetCurrentPosition(mixbuf, | |
| 352 &cursor, &junk); | |
| 353 } | |
| 354 if ( result != DS_OK ) { | |
| 355 SetDSerror("DirectSound GetCurrentPosition", result); | |
| 356 return(NULL); | |
| 357 } | |
| 358 cursor /= mixlen; | |
| 359 playing = cursor; | |
| 360 cursor = (cursor+1)%NUM_BUFFERS; | |
| 361 cursor *= mixlen; | |
| 362 | |
| 363 /* Lock the audio buffer */ | |
| 364 result = IDirectSoundBuffer_Lock(mixbuf, cursor, mixlen, | |
| 365 (LPVOID *)&locked_buf, &rawlen, NULL, &junk, 0); | |
| 366 if ( result == DSERR_BUFFERLOST ) { | |
| 367 IDirectSoundBuffer_Restore(mixbuf); | |
| 368 result = IDirectSoundBuffer_Lock(mixbuf, cursor, mixlen, | |
| 369 (LPVOID *)&locked_buf, &rawlen, NULL, &junk, 0); | |
| 370 } | |
| 371 if ( result != DS_OK ) { | |
| 372 SetDSerror("DirectSound Lock", result); | |
| 373 return(NULL); | |
| 374 } | |
| 375 return(locked_buf); | |
| 376 } | |
| 377 | |
| 378 static void DX5_WaitDone(_THIS) | |
| 379 { | |
| 380 Uint8 *stream; | |
| 381 | |
| 382 /* Wait for the playing chunk to finish */ | |
| 383 stream = this->GetAudioBuf(this); | |
| 384 if ( stream != NULL ) { | |
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385 SDL_memset(stream, silence, mixlen); |
| 0 | 386 this->PlayAudio(this); |
| 387 } | |
| 388 this->WaitAudio(this); | |
| 389 | |
| 390 /* Stop the looping sound buffer */ | |
| 391 IDirectSoundBuffer_Stop(mixbuf); | |
| 392 } | |
| 393 | |
| 394 static void DX5_CloseAudio(_THIS) | |
| 395 { | |
| 396 if ( sound != NULL ) { | |
| 397 if ( mixbuf != NULL ) { | |
| 398 /* Clean up the audio buffer */ | |
| 399 IDirectSoundBuffer_Release(mixbuf); | |
| 400 mixbuf = NULL; | |
| 401 } | |
| 402 if ( audio_event != NULL ) { | |
| 403 CloseHandle(audio_event); | |
| 404 audio_event = NULL; | |
| 405 } | |
| 406 IDirectSound_Release(sound); | |
| 407 sound = NULL; | |
| 408 } | |
| 409 } | |
| 410 | |
| 469 | 411 #ifdef USE_PRIMARY_BUFFER |
| 0 | 412 /* This function tries to create a primary audio buffer, and returns the |
| 413 number of audio chunks available in the created buffer. | |
| 414 */ | |
| 415 static int CreatePrimary(LPDIRECTSOUND sndObj, HWND focus, | |
| 416 LPDIRECTSOUNDBUFFER *sndbuf, WAVEFORMATEX *wavefmt, Uint32 chunksize) | |
| 417 { | |
| 418 HRESULT result; | |
| 419 DSBUFFERDESC format; | |
| 420 DSBCAPS caps; | |
| 421 int numchunks; | |
| 422 | |
| 423 /* Try to set primary mixing privileges */ | |
| 424 result = IDirectSound_SetCooperativeLevel(sndObj, focus, | |
| 425 DSSCL_WRITEPRIMARY); | |
| 426 if ( result != DS_OK ) { | |
| 427 #ifdef DEBUG_SOUND | |
| 428 SetDSerror("DirectSound SetCooperativeLevel", result); | |
| 429 #endif | |
| 430 return(-1); | |
| 431 } | |
| 432 | |
| 433 /* Try to create the primary buffer */ | |
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434 SDL_memset(&format, 0, sizeof(format)); |
| 0 | 435 format.dwSize = sizeof(format); |
| 436 format.dwFlags=(DSBCAPS_PRIMARYBUFFER|DSBCAPS_GETCURRENTPOSITION2); | |
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437 format.dwFlags |= DSBCAPS_STICKYFOCUS; |
| 0 | 438 #ifdef USE_POSITION_NOTIFY |
| 439 format.dwFlags |= DSBCAPS_CTRLPOSITIONNOTIFY; | |
| 440 #endif | |
| 441 result = IDirectSound_CreateSoundBuffer(sndObj, &format, sndbuf, NULL); | |
| 442 if ( result != DS_OK ) { | |
| 443 #ifdef DEBUG_SOUND | |
| 444 SetDSerror("DirectSound CreateSoundBuffer", result); | |
| 445 #endif | |
| 446 return(-1); | |
| 447 } | |
| 448 | |
| 449 /* Check the size of the fragment buffer */ | |
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450 SDL_memset(&caps, 0, sizeof(caps)); |
| 0 | 451 caps.dwSize = sizeof(caps); |
| 452 result = IDirectSoundBuffer_GetCaps(*sndbuf, &caps); | |
| 453 if ( result != DS_OK ) { | |
| 454 #ifdef DEBUG_SOUND | |
| 455 SetDSerror("DirectSound GetCaps", result); | |
| 456 #endif | |
| 457 IDirectSoundBuffer_Release(*sndbuf); | |
| 458 return(-1); | |
| 459 } | |
| 460 if ( (chunksize > caps.dwBufferBytes) || | |
| 461 ((caps.dwBufferBytes%chunksize) != 0) ) { | |
| 462 /* The primary buffer size is not a multiple of 'chunksize' | |
| 463 -- this hopefully doesn't happen when 'chunksize' is a | |
| 464 power of 2. | |
| 465 */ | |
| 466 IDirectSoundBuffer_Release(*sndbuf); | |
| 467 SDL_SetError( | |
| 468 "Primary buffer size is: %d, cannot break it into chunks of %d bytes\n", | |
| 469 caps.dwBufferBytes, chunksize); | |
| 470 return(-1); | |
| 471 } | |
| 472 numchunks = (caps.dwBufferBytes/chunksize); | |
| 473 | |
| 474 /* Set the primary audio format */ | |
| 475 result = IDirectSoundBuffer_SetFormat(*sndbuf, wavefmt); | |
| 476 if ( result != DS_OK ) { | |
| 477 #ifdef DEBUG_SOUND | |
| 478 SetDSerror("DirectSound SetFormat", result); | |
| 479 #endif | |
| 480 IDirectSoundBuffer_Release(*sndbuf); | |
| 481 return(-1); | |
| 482 } | |
| 483 return(numchunks); | |
| 484 } | |
| 469 | 485 #endif /* USE_PRIMARY_BUFFER */ |
| 0 | 486 |
| 487 /* This function tries to create a secondary audio buffer, and returns the | |
| 488 number of audio chunks available in the created buffer. | |
| 489 */ | |
| 490 static int CreateSecondary(LPDIRECTSOUND sndObj, HWND focus, | |
| 491 LPDIRECTSOUNDBUFFER *sndbuf, WAVEFORMATEX *wavefmt, Uint32 chunksize) | |
| 492 { | |
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493 const int numchunks = 2; |
| 0 | 494 HRESULT result; |
| 495 DSBUFFERDESC format; | |
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496 LPVOID pvAudioPtr1, pvAudioPtr2; |
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497 DWORD dwAudioBytes1, dwAudioBytes2; |
| 0 | 498 |
| 499 /* Try to set primary mixing privileges */ | |
| 500 if ( focus ) { | |
| 501 result = IDirectSound_SetCooperativeLevel(sndObj, | |
| 502 focus, DSSCL_PRIORITY); | |
| 503 } else { | |
| 504 result = IDirectSound_SetCooperativeLevel(sndObj, | |
| 505 GetDesktopWindow(), DSSCL_NORMAL); | |
| 506 } | |
| 507 if ( result != DS_OK ) { | |
| 508 #ifdef DEBUG_SOUND | |
| 509 SetDSerror("DirectSound SetCooperativeLevel", result); | |
| 510 #endif | |
| 511 return(-1); | |
| 512 } | |
| 513 | |
| 514 /* Try to create the secondary buffer */ | |
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515 SDL_memset(&format, 0, sizeof(format)); |
| 0 | 516 format.dwSize = sizeof(format); |
| 517 format.dwFlags = DSBCAPS_GETCURRENTPOSITION2; | |
| 518 #ifdef USE_POSITION_NOTIFY | |
| 519 format.dwFlags |= DSBCAPS_CTRLPOSITIONNOTIFY; | |
| 520 #endif | |
| 521 if ( ! focus ) { | |
| 522 format.dwFlags |= DSBCAPS_GLOBALFOCUS; | |
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523 } else { |
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524 format.dwFlags |= DSBCAPS_STICKYFOCUS; |
| 0 | 525 } |
| 526 format.dwBufferBytes = numchunks*chunksize; | |
| 527 if ( (format.dwBufferBytes < DSBSIZE_MIN) || | |
| 528 (format.dwBufferBytes > DSBSIZE_MAX) ) { | |
| 529 SDL_SetError("Sound buffer size must be between %d and %d", | |
| 530 DSBSIZE_MIN/numchunks, DSBSIZE_MAX/numchunks); | |
| 531 return(-1); | |
| 532 } | |
| 533 format.dwReserved = 0; | |
| 534 format.lpwfxFormat = wavefmt; | |
| 535 result = IDirectSound_CreateSoundBuffer(sndObj, &format, sndbuf, NULL); | |
| 536 if ( result != DS_OK ) { | |
| 537 SetDSerror("DirectSound CreateSoundBuffer", result); | |
| 538 return(-1); | |
| 539 } | |
| 540 IDirectSoundBuffer_SetFormat(*sndbuf, wavefmt); | |
| 541 | |
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542 /* Silence the initial audio buffer */ |
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543 result = IDirectSoundBuffer_Lock(*sndbuf, 0, format.dwBufferBytes, |
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544 (LPVOID *)&pvAudioPtr1, &dwAudioBytes1, |
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545 (LPVOID *)&pvAudioPtr2, &dwAudioBytes2, |
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546 DSBLOCK_ENTIREBUFFER); |
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547 if ( result == DS_OK ) { |
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548 if ( wavefmt->wBitsPerSample == 8 ) { |
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549 SDL_memset(pvAudioPtr1, 0x80, dwAudioBytes1); |
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550 } else { |
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551 SDL_memset(pvAudioPtr1, 0x00, dwAudioBytes1); |
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552 } |
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553 IDirectSoundBuffer_Unlock(*sndbuf, |
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554 (LPVOID)pvAudioPtr1, dwAudioBytes1, |
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555 (LPVOID)pvAudioPtr2, dwAudioBytes2); |
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556 } |
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557 |
| 0 | 558 /* We're ready to go */ |
| 559 return(numchunks); | |
| 560 } | |
| 561 | |
| 562 /* This function tries to set position notify events on the mixing buffer */ | |
| 563 #ifdef USE_POSITION_NOTIFY | |
| 564 static int CreateAudioEvent(_THIS) | |
| 565 { | |
| 566 LPDIRECTSOUNDNOTIFY notify; | |
| 567 DSBPOSITIONNOTIFY *notify_positions; | |
| 568 int i, retval; | |
| 569 HRESULT result; | |
| 570 | |
| 571 /* Default to fail on exit */ | |
| 572 retval = -1; | |
| 573 notify = NULL; | |
| 574 | |
| 575 /* Query for the interface */ | |
| 576 result = IDirectSoundBuffer_QueryInterface(mixbuf, | |
| 577 &IID_IDirectSoundNotify, (void *)¬ify); | |
| 578 if ( result != DS_OK ) { | |
| 579 goto done; | |
| 580 } | |
| 581 | |
| 582 /* Allocate the notify structures */ | |
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583 notify_positions = (DSBPOSITIONNOTIFY *)SDL_malloc(NUM_BUFFERS* |
| 0 | 584 sizeof(*notify_positions)); |
| 585 if ( notify_positions == NULL ) { | |
| 586 goto done; | |
| 587 } | |
| 588 | |
| 589 /* Create the notify event */ | |
| 590 audio_event = CreateEvent(NULL, FALSE, FALSE, NULL); | |
| 591 if ( audio_event == NULL ) { | |
| 592 goto done; | |
| 593 } | |
| 594 | |
| 595 /* Set up the notify structures */ | |
| 596 for ( i=0; i<NUM_BUFFERS; ++i ) { | |
| 597 notify_positions[i].dwOffset = i*mixlen; | |
| 598 notify_positions[i].hEventNotify = audio_event; | |
| 599 } | |
| 600 result = IDirectSoundNotify_SetNotificationPositions(notify, | |
| 601 NUM_BUFFERS, notify_positions); | |
| 602 if ( result == DS_OK ) { | |
| 603 retval = 0; | |
| 604 } | |
| 605 done: | |
| 606 if ( notify != NULL ) { | |
| 607 IDirectSoundNotify_Release(notify); | |
| 608 } | |
| 609 return(retval); | |
| 610 } | |
| 611 #endif /* USE_POSITION_NOTIFY */ | |
| 612 | |
| 613 static int DX5_OpenAudio(_THIS, SDL_AudioSpec *spec) | |
| 614 { | |
| 615 HRESULT result; | |
| 616 WAVEFORMATEX waveformat; | |
| 617 | |
| 618 /* Set basic WAVE format parameters */ | |
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619 SDL_memset(&waveformat, 0, sizeof(waveformat)); |
| 0 | 620 waveformat.wFormatTag = WAVE_FORMAT_PCM; |
| 621 | |
| 622 /* Determine the audio parameters from the AudioSpec */ | |
| 623 switch ( spec->format & 0xFF ) { | |
| 624 case 8: | |
| 625 /* Unsigned 8 bit audio data */ | |
| 626 spec->format = AUDIO_U8; | |
| 627 silence = 0x80; | |
| 628 waveformat.wBitsPerSample = 8; | |
| 629 break; | |
| 630 case 16: | |
| 631 /* Signed 16 bit audio data */ | |
| 632 spec->format = AUDIO_S16; | |
| 633 silence = 0x00; | |
| 634 waveformat.wBitsPerSample = 16; | |
| 635 break; | |
| 636 default: | |
| 637 SDL_SetError("Unsupported audio format"); | |
| 638 return(-1); | |
| 639 } | |
| 640 waveformat.nChannels = spec->channels; | |
| 641 waveformat.nSamplesPerSec = spec->freq; | |
| 642 waveformat.nBlockAlign = | |
| 643 waveformat.nChannels * (waveformat.wBitsPerSample/8); | |
| 644 waveformat.nAvgBytesPerSec = | |
| 645 waveformat.nSamplesPerSec * waveformat.nBlockAlign; | |
| 646 | |
| 647 /* Update the fragment size as size in bytes */ | |
| 648 SDL_CalculateAudioSpec(spec); | |
| 649 | |
| 650 /* Open the audio device */ | |
| 651 result = DSoundCreate(NULL, &sound, NULL); | |
| 652 if ( result != DS_OK ) { | |
| 653 SetDSerror("DirectSoundCreate", result); | |
| 654 return(-1); | |
| 655 } | |
| 656 | |
| 657 /* Create the audio buffer to which we write */ | |
| 658 NUM_BUFFERS = -1; | |
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659 #ifdef USE_PRIMARY_BUFFER |
| 0 | 660 if ( mainwin ) { |
| 661 NUM_BUFFERS = CreatePrimary(sound, mainwin, &mixbuf, | |
| 662 &waveformat, spec->size); | |
| 663 } | |
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664 #endif /* USE_PRIMARY_BUFFER */ |
| 0 | 665 if ( NUM_BUFFERS < 0 ) { |
| 666 NUM_BUFFERS = CreateSecondary(sound, mainwin, &mixbuf, | |
| 667 &waveformat, spec->size); | |
| 668 if ( NUM_BUFFERS < 0 ) { | |
| 669 return(-1); | |
| 670 } | |
| 671 #ifdef DEBUG_SOUND | |
| 672 fprintf(stderr, "Using secondary audio buffer\n"); | |
| 673 #endif | |
| 674 } | |
| 675 #ifdef DEBUG_SOUND | |
| 676 else | |
| 677 fprintf(stderr, "Using primary audio buffer\n"); | |
| 678 #endif | |
| 679 | |
| 680 /* The buffer will auto-start playing in DX5_WaitAudio() */ | |
| 681 playing = 0; | |
| 682 mixlen = spec->size; | |
| 683 | |
| 684 #ifdef USE_POSITION_NOTIFY | |
| 685 /* See if we can use DirectX 6 event notification */ | |
| 686 if ( CreateAudioEvent(this) == 0 ) { | |
| 687 this->WaitAudio = DX6_WaitAudio_EventWait; | |
| 688 } else { | |
| 689 this->WaitAudio = DX5_WaitAudio_BusyWait; | |
| 690 } | |
| 691 #endif | |
| 692 return(0); | |
| 693 } | |
| 694 |