| 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 */ |
| 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; |
| 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 */ |
| 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(); |
| 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 | |
| 130 | static void Audio_DeleteDevice(SDL_AudioDevice *device) |
| 131 | { |
| 132 | DX5_Unload(); |
| 133 | SDL_free(device->hidden); |
| 134 | SDL_free(device); |
| 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 */ |
| 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 | |
| 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; |
| 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 */ |
| 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, &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 |
| 303 | static 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 | |
| 330 | static 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 | |
| 339 | static 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 | |
| 389 | static 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 | |
| 405 | static 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 | */ |
| 426 | static 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 | */ |
| 501 | static 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 |
| 575 | static 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 *)¬ify); |
| 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 | } |
| 616 | done: |
| 617 | if ( notify != NULL ) { |
| 618 | IDirectSoundNotify_Release(notify); |
| 619 | } |
| 620 | return(retval); |
| 621 | } |
| 622 | #endif /* USE_POSITION_NOTIFY */ |
| 623 | |
| 624 | static 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 | |