Mercurial > sdl-ios-xcode
annotate src/audio/dart/SDL_dart.c @ 1357:e18467d67cfd
Whoops, need this. :)
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Fri, 10 Feb 2006 03:21:39 +0000 |
| parents | 604d73db6802 |
| children | c71e05b4dc2e |
| rev | line source |
|---|---|
| 1190 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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3 Copyright (C) 1997-2006 Sam Lantinga |
| 1190 | 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 |
| 1190 | 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. |
| 1190 | 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. |
| 1190 | 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 |
| 1190 | 18 |
| 19 Sam Lantinga | |
| 20 slouken@libsdl.org | |
| 21 */ | |
| 22 | |
| 23 /* Allow access to a raw mixing buffer */ | |
| 24 | |
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25 #include "SDL_stdlib.h" |
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26 #include "SDL_string.h" |
| 1190 | 27 #include "SDL_types.h" |
| 28 #include "SDL_error.h" | |
| 29 #include "SDL_timer.h" | |
| 30 #include "SDL_audio.h" | |
| 31 #include "SDL_audio_c.h" | |
| 32 #include "SDL_dart.h" | |
| 33 | |
| 34 // Buffer states: | |
| 35 #define BUFFER_EMPTY 0 | |
| 36 #define BUFFER_USED 1 | |
| 37 | |
| 38 typedef struct _tMixBufferDesc { | |
| 39 int iBufferUsage; // BUFFER_EMPTY or BUFFER_USED | |
| 40 SDL_AudioDevice *pSDLAudioDevice; | |
| 41 } tMixBufferDesc, *pMixBufferDesc; | |
| 42 | |
| 43 | |
| 44 //--------------------------------------------------------------------- | |
| 45 // DARTEventFunc | |
| 46 // | |
| 47 // This function is called by DART, when an event occures, like end of | |
| 48 // playback of a buffer, etc... | |
| 49 //--------------------------------------------------------------------- | |
| 50 LONG APIENTRY DARTEventFunc(ULONG ulStatus, | |
| 51 PMCI_MIX_BUFFER pBuffer, | |
| 52 ULONG ulFlags) | |
| 53 { | |
| 54 if (ulFlags && MIX_WRITE_COMPLETE) | |
| 55 { // Playback of buffer completed! | |
| 56 | |
| 57 // Get pointer to buffer description | |
| 58 pMixBufferDesc pBufDesc; | |
| 59 | |
| 60 if (pBuffer) | |
| 61 { | |
| 62 pBufDesc = (pMixBufferDesc) (*pBuffer).ulUserParm; | |
| 63 | |
| 64 if (pBufDesc) | |
| 65 { | |
| 66 SDL_AudioDevice *pSDLAudioDevice = pBufDesc->pSDLAudioDevice; | |
| 67 // Set the buffer to be empty | |
| 68 pBufDesc->iBufferUsage = BUFFER_EMPTY; | |
| 69 // And notify DART feeder thread that it will have to work a bit. | |
| 70 if (pSDLAudioDevice) | |
| 71 DosPostEventSem(pSDLAudioDevice->hidden->hevAudioBufferPlayed); | |
| 72 } | |
| 73 } | |
| 74 } | |
| 75 return TRUE; | |
| 76 } | |
| 77 | |
| 78 | |
| 79 int DART_OpenAudio(_THIS, SDL_AudioSpec *spec) | |
| 80 { | |
| 81 MCI_AMP_OPEN_PARMS AmpOpenParms; | |
| 82 MCI_GENERIC_PARMS GenericParms; | |
| 83 int iDeviceOrd = 0; // Default device to be used | |
| 84 int bOpenShared = 1; // Try opening it shared | |
| 85 int iBits = 16; // Default is 16 bits signed | |
| 86 int iFreq = 44100; // Default is 44KHz | |
| 87 int iChannels = 2; // Default is 2 channels (Stereo) | |
| 88 int iNumBufs = 2; // Number of audio buffers: 2 | |
| 89 int iBufSize; | |
| 90 int iOpenMode; | |
| 91 int iSilence; | |
| 92 int rc; | |
| 93 | |
| 94 // First thing is to try to open a given DART device! | |
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95 SDL_memset(&AmpOpenParms, 0, sizeof(MCI_AMP_OPEN_PARMS)); |
| 1190 | 96 // pszDeviceType should contain the device type in low word, and device ordinal in high word! |
| 97 AmpOpenParms.pszDeviceType = (PSZ) (MCI_DEVTYPE_AUDIO_AMPMIX | (iDeviceOrd << 16)); | |
| 98 | |
| 99 iOpenMode = MCI_WAIT | MCI_OPEN_TYPE_ID; | |
| 100 if (bOpenShared) iOpenMode |= MCI_OPEN_SHAREABLE; | |
| 101 | |
| 102 rc = mciSendCommand( 0, MCI_OPEN, | |
| 103 iOpenMode, | |
| 104 (PVOID) &AmpOpenParms, 0); | |
| 105 if (rc!=MCIERR_SUCCESS) // No audio available?? | |
| 106 return (-1); | |
| 107 // Save the device ID we got from DART! | |
| 108 // We will use this in the next calls! | |
| 109 iDeviceOrd = AmpOpenParms.usDeviceID; | |
| 110 | |
| 111 // Determine the audio parameters from the AudioSpec | |
| 112 switch ( spec->format & 0xFF ) | |
| 113 { | |
| 114 case 8: | |
| 115 /* Unsigned 8 bit audio data */ | |
| 116 spec->format = AUDIO_U8; | |
| 117 iSilence = 0x80; | |
| 118 iBits = 8; | |
| 119 break; | |
| 120 case 16: | |
| 121 /* Signed 16 bit audio data */ | |
| 122 spec->format = AUDIO_S16; | |
| 123 iSilence = 0x00; | |
| 124 iBits = 16; | |
| 125 break; | |
| 126 default: | |
| 127 // Close DART, and exit with error code! | |
| 128 mciSendCommand(iDeviceOrd, MCI_CLOSE, MCI_WAIT, &GenericParms, 0); | |
| 129 SDL_SetError("Unsupported audio format"); | |
| 130 return(-1); | |
| 131 } | |
| 132 iFreq = spec->freq; | |
| 133 iChannels = spec->channels; | |
| 134 /* Update the fragment size as size in bytes */ | |
| 135 SDL_CalculateAudioSpec(spec); | |
| 136 iBufSize = spec->size; | |
| 137 | |
| 138 // Now query this device if it supports the given freq/bits/channels! | |
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139 SDL_memset(&(_this->hidden->MixSetupParms), 0, sizeof(MCI_MIXSETUP_PARMS)); |
| 1190 | 140 _this->hidden->MixSetupParms.ulBitsPerSample = iBits; |
| 141 _this->hidden->MixSetupParms.ulFormatTag = MCI_WAVE_FORMAT_PCM; | |
| 142 _this->hidden->MixSetupParms.ulSamplesPerSec = iFreq; | |
| 143 _this->hidden->MixSetupParms.ulChannels = iChannels; | |
| 144 _this->hidden->MixSetupParms.ulFormatMode = MCI_PLAY; | |
| 145 _this->hidden->MixSetupParms.ulDeviceType = MCI_DEVTYPE_WAVEFORM_AUDIO; | |
| 146 _this->hidden->MixSetupParms.pmixEvent = DARTEventFunc; | |
| 147 rc = mciSendCommand (iDeviceOrd, MCI_MIXSETUP, | |
| 148 MCI_WAIT | MCI_MIXSETUP_QUERYMODE, | |
| 149 &(_this->hidden->MixSetupParms), 0); | |
| 150 if (rc!=MCIERR_SUCCESS) | |
| 151 { // The device cannot handle this format! | |
| 152 // Close DART, and exit with error code! | |
| 153 mciSendCommand(iDeviceOrd, MCI_CLOSE, MCI_WAIT, &GenericParms, 0); | |
| 154 SDL_SetError("Audio device doesn't support requested audio format"); | |
| 155 return(-1); | |
| 156 } | |
| 157 // The device can handle this format, so initialize! | |
| 158 rc = mciSendCommand(iDeviceOrd, MCI_MIXSETUP, | |
| 159 MCI_WAIT | MCI_MIXSETUP_INIT, | |
| 160 &(_this->hidden->MixSetupParms), 0); | |
| 161 if (rc!=MCIERR_SUCCESS) | |
| 162 { // The device could not be opened! | |
| 163 // Close DART, and exit with error code! | |
| 164 mciSendCommand(iDeviceOrd, MCI_CLOSE, MCI_WAIT, &GenericParms, 0); | |
| 165 SDL_SetError("Audio device could not be set up"); | |
| 166 return(-1); | |
| 167 } | |
| 168 // Ok, the device is initialized. | |
| 169 // Now we should allocate buffers. For this, we need a place where | |
| 170 // the buffer descriptors will be: | |
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171 _this->hidden->pMixBuffers = (MCI_MIX_BUFFER *) SDL_malloc(sizeof(MCI_MIX_BUFFER)*iNumBufs); |
| 1190 | 172 if (!(_this->hidden->pMixBuffers)) |
| 173 { // Not enough memory! | |
| 174 // Close DART, and exit with error code! | |
| 175 mciSendCommand(iDeviceOrd, MCI_CLOSE, MCI_WAIT, &GenericParms, 0); | |
| 176 SDL_SetError("Not enough memory for audio buffer descriptors"); | |
| 177 return(-1); | |
| 178 } | |
| 179 // Now that we have the place for buffer list, we can ask DART for the | |
| 180 // buffers! | |
| 181 _this->hidden->BufferParms.ulNumBuffers = iNumBufs; // Number of buffers | |
| 182 _this->hidden->BufferParms.ulBufferSize = iBufSize; // each with this size | |
| 183 _this->hidden->BufferParms.pBufList = _this->hidden->pMixBuffers; // getting descriptorts into this list | |
| 184 // Allocate buffers! | |
| 185 rc = mciSendCommand(iDeviceOrd, MCI_BUFFER, | |
| 186 MCI_WAIT | MCI_ALLOCATE_MEMORY, | |
| 187 &(_this->hidden->BufferParms), 0); | |
| 188 if ((rc!=MCIERR_SUCCESS) || (iNumBufs != _this->hidden->BufferParms.ulNumBuffers) || (_this->hidden->BufferParms.ulBufferSize==0)) | |
| 189 { // Could not allocate memory! | |
| 190 // Close DART, and exit with error code! | |
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191 SDL_free(_this->hidden->pMixBuffers); _this->hidden->pMixBuffers = NULL; |
| 1190 | 192 mciSendCommand(iDeviceOrd, MCI_CLOSE, MCI_WAIT, &GenericParms, 0); |
| 193 SDL_SetError("DART could not allocate buffers"); | |
| 194 return(-1); | |
| 195 } | |
| 196 // Ok, we have all the buffers allocated, let's mark them! | |
| 197 { | |
| 198 int i; | |
| 199 for (i=0; i<iNumBufs; i++) | |
| 200 { | |
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201 pMixBufferDesc pBufferDesc = (pMixBufferDesc) SDL_malloc(sizeof(tMixBufferDesc));; |
| 1190 | 202 // Check if this buffer was really allocated by DART |
| 203 if ((!(_this->hidden->pMixBuffers[i].pBuffer)) || (!pBufferDesc)) | |
| 204 { // Wrong buffer! | |
| 205 // Close DART, and exit with error code! | |
| 206 // Free buffer descriptions | |
| 207 { int j; | |
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208 for (j=0; j<i; j++) SDL_free((void *)(_this->hidden->pMixBuffers[j].ulUserParm)); |
| 1190 | 209 } |
| 210 // and cleanup | |
| 211 mciSendCommand(iDeviceOrd, MCI_BUFFER, MCI_WAIT | MCI_DEALLOCATE_MEMORY, &(_this->hidden->BufferParms), 0); | |
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212 SDL_free(_this->hidden->pMixBuffers); _this->hidden->pMixBuffers = NULL; |
| 1190 | 213 mciSendCommand(iDeviceOrd, MCI_CLOSE, MCI_WAIT, &GenericParms, 0); |
| 214 SDL_SetError("Error at internal buffer check"); | |
| 215 return(-1); | |
| 216 } | |
| 217 pBufferDesc->iBufferUsage = BUFFER_EMPTY; | |
| 218 pBufferDesc->pSDLAudioDevice = _this; | |
| 219 | |
| 220 _this->hidden->pMixBuffers[i].ulBufferLength = _this->hidden->BufferParms.ulBufferSize; | |
| 221 _this->hidden->pMixBuffers[i].ulUserParm = (ULONG) pBufferDesc; // User parameter: Description of buffer | |
| 222 _this->hidden->pMixBuffers[i].ulFlags = 0; // Some stuff should be flagged here for DART, like end of | |
| 223 // audio data, but as we will continously send | |
| 224 // audio data, there will be no end.:) | |
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225 SDL_memset(_this->hidden->pMixBuffers[i].pBuffer, iSilence, iBufSize); |
| 1190 | 226 } |
| 227 } | |
| 228 _this->hidden->iNextFreeBuffer = 0; | |
| 229 _this->hidden->iLastPlayedBuf = -1; | |
| 230 // Create event semaphore | |
| 231 if (DosCreateEventSem(NULL, &(_this->hidden->hevAudioBufferPlayed), 0, FALSE)!=NO_ERROR) | |
| 232 { | |
| 233 // Could not create event semaphore! | |
| 234 { | |
| 235 int i; | |
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236 for (i=0; i<iNumBufs; i++) SDL_free((void *)(_this->hidden->pMixBuffers[i].ulUserParm)); |
| 1190 | 237 } |
| 238 mciSendCommand(iDeviceOrd, MCI_BUFFER, MCI_WAIT | MCI_DEALLOCATE_MEMORY, &(_this->hidden->BufferParms), 0); | |
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239 SDL_free(_this->hidden->pMixBuffers); _this->hidden->pMixBuffers = NULL; |
| 1190 | 240 mciSendCommand(iDeviceOrd, MCI_CLOSE, MCI_WAIT, &GenericParms, 0); |
| 241 SDL_SetError("Could not create event semaphore"); | |
| 242 return(-1); | |
| 243 } | |
| 244 | |
| 245 // Store the new settings in global variables | |
| 246 _this->hidden->iCurrDeviceOrd = iDeviceOrd; | |
| 247 _this->hidden->iCurrFreq = iFreq; | |
| 248 _this->hidden->iCurrBits = iBits; | |
| 249 _this->hidden->iCurrChannels = iChannels; | |
| 250 _this->hidden->iCurrNumBufs = iNumBufs; | |
| 251 _this->hidden->iCurrBufSize = iBufSize; | |
| 252 | |
| 253 return (0); | |
| 254 } | |
| 255 | |
| 256 | |
| 257 | |
| 258 void DART_ThreadInit(_THIS) | |
| 259 { | |
| 260 return; | |
| 261 } | |
| 262 | |
| 263 /* This function waits until it is possible to write a full sound buffer */ | |
| 264 void DART_WaitAudio(_THIS) | |
| 265 { | |
| 266 int i; | |
| 267 pMixBufferDesc pBufDesc; | |
| 268 ULONG ulPostCount; | |
| 269 | |
| 270 DosResetEventSem(_this->hidden->hevAudioBufferPlayed, &ulPostCount); | |
| 271 // If there is already an empty buffer, then return now! | |
| 272 for (i=0; i<_this->hidden->iCurrNumBufs; i++) | |
| 273 { | |
| 274 pBufDesc = (pMixBufferDesc) _this->hidden->pMixBuffers[i].ulUserParm; | |
| 275 if (pBufDesc->iBufferUsage == BUFFER_EMPTY) | |
| 276 return; | |
| 277 } | |
| 278 // If there is no empty buffer, wait for one to be empty! | |
| 279 DosWaitEventSem(_this->hidden->hevAudioBufferPlayed, 1000); // Wait max 1 sec!!! Important! | |
| 280 return; | |
| 281 } | |
| 282 | |
| 283 void DART_PlayAudio(_THIS) | |
| 284 { | |
| 285 int iFreeBuf = _this->hidden->iNextFreeBuffer; | |
| 286 pMixBufferDesc pBufDesc; | |
| 287 | |
| 288 pBufDesc = (pMixBufferDesc) _this->hidden->pMixBuffers[iFreeBuf].ulUserParm; | |
| 289 pBufDesc->iBufferUsage = BUFFER_USED; | |
| 290 // Send it to DART to be queued | |
| 291 _this->hidden->MixSetupParms.pmixWrite(_this->hidden->MixSetupParms.ulMixHandle, | |
| 292 &(_this->hidden->pMixBuffers[iFreeBuf]), 1); | |
| 293 | |
| 294 _this->hidden->iLastPlayedBuf = iFreeBuf; | |
| 295 iFreeBuf = (iFreeBuf+1) % _this->hidden->iCurrNumBufs; | |
| 296 _this->hidden->iNextFreeBuffer = iFreeBuf; | |
| 297 } | |
| 298 | |
| 299 Uint8 *DART_GetAudioBuf(_THIS) | |
| 300 { | |
| 301 int iFreeBuf; | |
| 302 Uint8 *pResult; | |
| 303 pMixBufferDesc pBufDesc; | |
| 304 | |
| 305 if (_this) | |
| 306 { | |
| 307 if (_this->hidden) | |
| 308 { | |
| 309 iFreeBuf = _this->hidden->iNextFreeBuffer; | |
| 310 pBufDesc = (pMixBufferDesc) _this->hidden->pMixBuffers[iFreeBuf].ulUserParm; | |
| 311 | |
| 312 if (pBufDesc) | |
| 313 { | |
| 314 if (pBufDesc->iBufferUsage == BUFFER_EMPTY) | |
| 315 { | |
| 316 pResult = _this->hidden->pMixBuffers[iFreeBuf].pBuffer; | |
| 317 return pResult; | |
| 318 } | |
| 319 } else | |
| 320 printf("[DART_GetAudioBuf] : ERROR! pBufDesc = %p\n", pBufDesc); | |
| 321 } else | |
| 322 printf("[DART_GetAudioBuf] : ERROR! _this->hidden = %p\n", _this->hidden); | |
| 323 } else | |
| 324 printf("[DART_GetAudioBuf] : ERROR! _this = %p\n", _this); | |
| 325 return NULL; | |
| 326 } | |
| 327 | |
| 328 void DART_WaitDone(_THIS) | |
| 329 { | |
| 330 pMixBufferDesc pBufDesc; | |
| 331 ULONG ulPostCount; | |
| 332 APIRET rc; | |
| 333 | |
| 334 pBufDesc = (pMixBufferDesc) _this->hidden->pMixBuffers[_this->hidden->iLastPlayedBuf].ulUserParm; | |
| 335 rc = NO_ERROR; | |
| 336 while ((pBufDesc->iBufferUsage != BUFFER_EMPTY) && (rc==NO_ERROR)) | |
| 337 { | |
| 338 DosResetEventSem(_this->hidden->hevAudioBufferPlayed, &ulPostCount); | |
| 339 rc = DosWaitEventSem(_this->hidden->hevAudioBufferPlayed, 1000); // 1 sec timeout! Important! | |
| 340 } | |
| 341 } | |
| 342 | |
| 343 void DART_CloseAudio(_THIS) | |
| 344 { | |
| 345 MCI_GENERIC_PARMS GenericParms; | |
| 346 int rc; | |
| 347 | |
| 348 // Stop DART playback | |
| 349 rc = mciSendCommand(_this->hidden->iCurrDeviceOrd, MCI_STOP, MCI_WAIT, &GenericParms, 0); | |
| 350 if (rc!=MCIERR_SUCCESS) | |
| 351 { | |
| 352 #ifdef SFX_DEBUG_BUILD | |
| 353 printf("Could not stop DART playback!\n"); | |
| 354 fflush(stdout); | |
| 355 #endif | |
| 356 } | |
| 357 | |
| 358 // Close event semaphore | |
| 359 DosCloseEventSem(_this->hidden->hevAudioBufferPlayed); | |
| 360 | |
| 361 // Free memory of buffer descriptions | |
| 362 { | |
| 363 int i; | |
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364 for (i=0; i<_this->hidden->iCurrNumBufs; i++) SDL_free((void *)(_this->hidden->pMixBuffers[i].ulUserParm)); |
| 1190 | 365 } |
| 366 | |
| 367 // Deallocate buffers | |
| 368 rc = mciSendCommand(_this->hidden->iCurrDeviceOrd, MCI_BUFFER, MCI_WAIT | MCI_DEALLOCATE_MEMORY, &(_this->hidden->BufferParms), 0); | |
| 369 | |
| 370 // Free bufferlist | |
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371 SDL_free(_this->hidden->pMixBuffers); _this->hidden->pMixBuffers = NULL; |
| 1190 | 372 |
| 373 // Close dart | |
| 374 rc = mciSendCommand(_this->hidden->iCurrDeviceOrd, MCI_CLOSE, MCI_WAIT, &(GenericParms), 0); | |
| 375 } | |
| 376 | |
| 377 /* Audio driver bootstrap functions */ | |
| 378 | |
| 379 int Audio_Available(void) | |
| 380 { | |
| 381 return(1); | |
| 382 } | |
| 383 | |
| 384 void Audio_DeleteDevice(SDL_AudioDevice *device) | |
| 385 { | |
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386 SDL_free(device->hidden); |
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387 SDL_free(device); |
| 1190 | 388 } |
| 389 | |
| 390 SDL_AudioDevice *Audio_CreateDevice(int devindex) | |
| 391 { | |
| 392 SDL_AudioDevice *this; | |
| 393 | |
| 394 /* Initialize all variables that we clean on shutdown */ | |
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395 this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice)); |
| 1190 | 396 if ( this ) |
| 397 { | |
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398 SDL_memset(this, 0, (sizeof *this)); |
| 1190 | 399 this->hidden = (struct SDL_PrivateAudioData *) |
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400 SDL_malloc((sizeof *this->hidden)); |
| 1190 | 401 } |
| 402 if ( (this == NULL) || (this->hidden == NULL) ) | |
| 403 { | |
| 404 SDL_OutOfMemory(); | |
| 405 if ( this ) | |
|
1336
3692456e7b0f
Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents:
1312
diff
changeset
|
406 SDL_free(this); |
| 1190 | 407 return(0); |
| 408 } | |
|
1336
3692456e7b0f
Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents:
1312
diff
changeset
|
409 SDL_memset(this->hidden, 0, (sizeof *this->hidden)); |
| 1190 | 410 |
| 411 /* Set the function pointers */ | |
| 412 this->OpenAudio = DART_OpenAudio; | |
| 413 this->ThreadInit = DART_ThreadInit; | |
| 414 this->WaitAudio = DART_WaitAudio; | |
| 415 this->PlayAudio = DART_PlayAudio; | |
| 416 this->GetAudioBuf = DART_GetAudioBuf; | |
| 417 this->WaitDone = DART_WaitDone; | |
| 418 this->CloseAudio = DART_CloseAudio; | |
| 419 | |
| 420 this->free = Audio_DeleteDevice; | |
| 421 | |
| 422 return this; | |
| 423 } | |
| 424 | |
| 425 AudioBootStrap DART_bootstrap = { | |
| 426 "dart", "OS/2 Direct Audio RouTines (DART)", | |
| 427 Audio_Available, Audio_CreateDevice | |
| 428 }; | |
| 429 |