Mercurial > sdl-ios-xcode
annotate src/audio/dart/SDL_dart.c @ 1567:12b6d331d82a
Good idea, renaming OpenBSD audio to BSD audio.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Tue, 21 Mar 2006 09:33:54 +0000 |
| parents | d910939febfa |
| children | 782fd950bd46 c121d94672cb 405a192b68e7 |
| 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 */ | |
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22 #include "SDL_config.h" |
| 1190 | 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" |
| 1190 | 29 #include "SDL_dart.h" |
| 30 | |
| 31 // Buffer states: | |
| 32 #define BUFFER_EMPTY 0 | |
| 33 #define BUFFER_USED 1 | |
| 34 | |
| 35 typedef struct _tMixBufferDesc { | |
| 36 int iBufferUsage; // BUFFER_EMPTY or BUFFER_USED | |
| 37 SDL_AudioDevice *pSDLAudioDevice; | |
| 38 } tMixBufferDesc, *pMixBufferDesc; | |
| 39 | |
| 40 | |
| 41 //--------------------------------------------------------------------- | |
| 42 // DARTEventFunc | |
| 43 // | |
| 44 // This function is called by DART, when an event occures, like end of | |
| 45 // playback of a buffer, etc... | |
| 46 //--------------------------------------------------------------------- | |
| 47 LONG APIENTRY DARTEventFunc(ULONG ulStatus, | |
| 48 PMCI_MIX_BUFFER pBuffer, | |
| 49 ULONG ulFlags) | |
| 50 { | |
| 51 if (ulFlags && MIX_WRITE_COMPLETE) | |
| 52 { // Playback of buffer completed! | |
| 53 | |
| 54 // Get pointer to buffer description | |
| 55 pMixBufferDesc pBufDesc; | |
| 56 | |
| 57 if (pBuffer) | |
| 58 { | |
| 59 pBufDesc = (pMixBufferDesc) (*pBuffer).ulUserParm; | |
| 60 | |
| 61 if (pBufDesc) | |
| 62 { | |
| 63 SDL_AudioDevice *pSDLAudioDevice = pBufDesc->pSDLAudioDevice; | |
| 64 // Set the buffer to be empty | |
| 65 pBufDesc->iBufferUsage = BUFFER_EMPTY; | |
| 66 // And notify DART feeder thread that it will have to work a bit. | |
| 67 if (pSDLAudioDevice) | |
| 68 DosPostEventSem(pSDLAudioDevice->hidden->hevAudioBufferPlayed); | |
| 69 } | |
| 70 } | |
| 71 } | |
| 72 return TRUE; | |
| 73 } | |
| 74 | |
| 75 | |
| 76 int DART_OpenAudio(_THIS, SDL_AudioSpec *spec) | |
| 77 { | |
| 78 MCI_AMP_OPEN_PARMS AmpOpenParms; | |
| 79 MCI_GENERIC_PARMS GenericParms; | |
| 80 int iDeviceOrd = 0; // Default device to be used | |
| 81 int bOpenShared = 1; // Try opening it shared | |
| 82 int iBits = 16; // Default is 16 bits signed | |
| 83 int iFreq = 44100; // Default is 44KHz | |
| 84 int iChannels = 2; // Default is 2 channels (Stereo) | |
| 85 int iNumBufs = 2; // Number of audio buffers: 2 | |
| 86 int iBufSize; | |
| 87 int iOpenMode; | |
| 88 int iSilence; | |
| 89 int rc; | |
| 90 | |
| 91 // First thing is to try to open a given DART device! | |
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92 SDL_memset(&AmpOpenParms, 0, sizeof(MCI_AMP_OPEN_PARMS)); |
| 1190 | 93 // pszDeviceType should contain the device type in low word, and device ordinal in high word! |
| 94 AmpOpenParms.pszDeviceType = (PSZ) (MCI_DEVTYPE_AUDIO_AMPMIX | (iDeviceOrd << 16)); | |
| 95 | |
| 96 iOpenMode = MCI_WAIT | MCI_OPEN_TYPE_ID; | |
| 97 if (bOpenShared) iOpenMode |= MCI_OPEN_SHAREABLE; | |
| 98 | |
| 99 rc = mciSendCommand( 0, MCI_OPEN, | |
| 100 iOpenMode, | |
| 101 (PVOID) &AmpOpenParms, 0); | |
| 102 if (rc!=MCIERR_SUCCESS) // No audio available?? | |
| 103 return (-1); | |
| 104 // Save the device ID we got from DART! | |
| 105 // We will use this in the next calls! | |
| 106 iDeviceOrd = AmpOpenParms.usDeviceID; | |
| 107 | |
| 108 // Determine the audio parameters from the AudioSpec | |
| 109 switch ( spec->format & 0xFF ) | |
| 110 { | |
| 111 case 8: | |
| 112 /* Unsigned 8 bit audio data */ | |
| 113 spec->format = AUDIO_U8; | |
| 114 iSilence = 0x80; | |
| 115 iBits = 8; | |
| 116 break; | |
| 117 case 16: | |
| 118 /* Signed 16 bit audio data */ | |
| 119 spec->format = AUDIO_S16; | |
| 120 iSilence = 0x00; | |
| 121 iBits = 16; | |
| 122 break; | |
| 123 default: | |
| 124 // Close DART, and exit with error code! | |
| 125 mciSendCommand(iDeviceOrd, MCI_CLOSE, MCI_WAIT, &GenericParms, 0); | |
| 126 SDL_SetError("Unsupported audio format"); | |
| 127 return(-1); | |
| 128 } | |
| 129 iFreq = spec->freq; | |
| 130 iChannels = spec->channels; | |
| 131 /* Update the fragment size as size in bytes */ | |
| 132 SDL_CalculateAudioSpec(spec); | |
| 133 iBufSize = spec->size; | |
| 134 | |
| 135 // Now query this device if it supports the given freq/bits/channels! | |
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136 SDL_memset(&(_this->hidden->MixSetupParms), 0, sizeof(MCI_MIXSETUP_PARMS)); |
| 1190 | 137 _this->hidden->MixSetupParms.ulBitsPerSample = iBits; |
| 138 _this->hidden->MixSetupParms.ulFormatTag = MCI_WAVE_FORMAT_PCM; | |
| 139 _this->hidden->MixSetupParms.ulSamplesPerSec = iFreq; | |
| 140 _this->hidden->MixSetupParms.ulChannels = iChannels; | |
| 141 _this->hidden->MixSetupParms.ulFormatMode = MCI_PLAY; | |
| 142 _this->hidden->MixSetupParms.ulDeviceType = MCI_DEVTYPE_WAVEFORM_AUDIO; | |
| 143 _this->hidden->MixSetupParms.pmixEvent = DARTEventFunc; | |
| 144 rc = mciSendCommand (iDeviceOrd, MCI_MIXSETUP, | |
| 145 MCI_WAIT | MCI_MIXSETUP_QUERYMODE, | |
| 146 &(_this->hidden->MixSetupParms), 0); | |
| 147 if (rc!=MCIERR_SUCCESS) | |
| 148 { // The device cannot handle this format! | |
| 149 // Close DART, and exit with error code! | |
| 150 mciSendCommand(iDeviceOrd, MCI_CLOSE, MCI_WAIT, &GenericParms, 0); | |
| 151 SDL_SetError("Audio device doesn't support requested audio format"); | |
| 152 return(-1); | |
| 153 } | |
| 154 // The device can handle this format, so initialize! | |
| 155 rc = mciSendCommand(iDeviceOrd, MCI_MIXSETUP, | |
| 156 MCI_WAIT | MCI_MIXSETUP_INIT, | |
| 157 &(_this->hidden->MixSetupParms), 0); | |
| 158 if (rc!=MCIERR_SUCCESS) | |
| 159 { // The device could not be opened! | |
| 160 // Close DART, and exit with error code! | |
| 161 mciSendCommand(iDeviceOrd, MCI_CLOSE, MCI_WAIT, &GenericParms, 0); | |
| 162 SDL_SetError("Audio device could not be set up"); | |
| 163 return(-1); | |
| 164 } | |
| 165 // Ok, the device is initialized. | |
| 166 // Now we should allocate buffers. For this, we need a place where | |
| 167 // the buffer descriptors will be: | |
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168 _this->hidden->pMixBuffers = (MCI_MIX_BUFFER *) SDL_malloc(sizeof(MCI_MIX_BUFFER)*iNumBufs); |
| 1190 | 169 if (!(_this->hidden->pMixBuffers)) |
| 170 { // Not enough memory! | |
| 171 // Close DART, and exit with error code! | |
| 172 mciSendCommand(iDeviceOrd, MCI_CLOSE, MCI_WAIT, &GenericParms, 0); | |
| 173 SDL_SetError("Not enough memory for audio buffer descriptors"); | |
| 174 return(-1); | |
| 175 } | |
| 176 // Now that we have the place for buffer list, we can ask DART for the | |
| 177 // buffers! | |
| 178 _this->hidden->BufferParms.ulNumBuffers = iNumBufs; // Number of buffers | |
| 179 _this->hidden->BufferParms.ulBufferSize = iBufSize; // each with this size | |
| 180 _this->hidden->BufferParms.pBufList = _this->hidden->pMixBuffers; // getting descriptorts into this list | |
| 181 // Allocate buffers! | |
| 182 rc = mciSendCommand(iDeviceOrd, MCI_BUFFER, | |
| 183 MCI_WAIT | MCI_ALLOCATE_MEMORY, | |
| 184 &(_this->hidden->BufferParms), 0); | |
| 185 if ((rc!=MCIERR_SUCCESS) || (iNumBufs != _this->hidden->BufferParms.ulNumBuffers) || (_this->hidden->BufferParms.ulBufferSize==0)) | |
| 186 { // Could not allocate memory! | |
| 187 // Close DART, and exit with error code! | |
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188 SDL_free(_this->hidden->pMixBuffers); _this->hidden->pMixBuffers = NULL; |
| 1190 | 189 mciSendCommand(iDeviceOrd, MCI_CLOSE, MCI_WAIT, &GenericParms, 0); |
| 190 SDL_SetError("DART could not allocate buffers"); | |
| 191 return(-1); | |
| 192 } | |
| 193 // Ok, we have all the buffers allocated, let's mark them! | |
| 194 { | |
| 195 int i; | |
| 196 for (i=0; i<iNumBufs; i++) | |
| 197 { | |
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198 pMixBufferDesc pBufferDesc = (pMixBufferDesc) SDL_malloc(sizeof(tMixBufferDesc));; |
| 1190 | 199 // Check if this buffer was really allocated by DART |
| 200 if ((!(_this->hidden->pMixBuffers[i].pBuffer)) || (!pBufferDesc)) | |
| 201 { // Wrong buffer! | |
| 202 // Close DART, and exit with error code! | |
| 203 // Free buffer descriptions | |
| 204 { int j; | |
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205 for (j=0; j<i; j++) SDL_free((void *)(_this->hidden->pMixBuffers[j].ulUserParm)); |
| 1190 | 206 } |
| 207 // and cleanup | |
| 208 mciSendCommand(iDeviceOrd, MCI_BUFFER, MCI_WAIT | MCI_DEALLOCATE_MEMORY, &(_this->hidden->BufferParms), 0); | |
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209 SDL_free(_this->hidden->pMixBuffers); _this->hidden->pMixBuffers = NULL; |
| 1190 | 210 mciSendCommand(iDeviceOrd, MCI_CLOSE, MCI_WAIT, &GenericParms, 0); |
| 211 SDL_SetError("Error at internal buffer check"); | |
| 212 return(-1); | |
| 213 } | |
| 214 pBufferDesc->iBufferUsage = BUFFER_EMPTY; | |
| 215 pBufferDesc->pSDLAudioDevice = _this; | |
| 216 | |
| 217 _this->hidden->pMixBuffers[i].ulBufferLength = _this->hidden->BufferParms.ulBufferSize; | |
| 218 _this->hidden->pMixBuffers[i].ulUserParm = (ULONG) pBufferDesc; // User parameter: Description of buffer | |
| 219 _this->hidden->pMixBuffers[i].ulFlags = 0; // Some stuff should be flagged here for DART, like end of | |
| 220 // audio data, but as we will continously send | |
| 221 // audio data, there will be no end.:) | |
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222 SDL_memset(_this->hidden->pMixBuffers[i].pBuffer, iSilence, iBufSize); |
| 1190 | 223 } |
| 224 } | |
| 225 _this->hidden->iNextFreeBuffer = 0; | |
| 226 _this->hidden->iLastPlayedBuf = -1; | |
| 227 // Create event semaphore | |
| 228 if (DosCreateEventSem(NULL, &(_this->hidden->hevAudioBufferPlayed), 0, FALSE)!=NO_ERROR) | |
| 229 { | |
| 230 // Could not create event semaphore! | |
| 231 { | |
| 232 int i; | |
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233 for (i=0; i<iNumBufs; i++) SDL_free((void *)(_this->hidden->pMixBuffers[i].ulUserParm)); |
| 1190 | 234 } |
| 235 mciSendCommand(iDeviceOrd, MCI_BUFFER, MCI_WAIT | MCI_DEALLOCATE_MEMORY, &(_this->hidden->BufferParms), 0); | |
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236 SDL_free(_this->hidden->pMixBuffers); _this->hidden->pMixBuffers = NULL; |
| 1190 | 237 mciSendCommand(iDeviceOrd, MCI_CLOSE, MCI_WAIT, &GenericParms, 0); |
| 238 SDL_SetError("Could not create event semaphore"); | |
| 239 return(-1); | |
| 240 } | |
| 241 | |
| 242 // Store the new settings in global variables | |
| 243 _this->hidden->iCurrDeviceOrd = iDeviceOrd; | |
| 244 _this->hidden->iCurrFreq = iFreq; | |
| 245 _this->hidden->iCurrBits = iBits; | |
| 246 _this->hidden->iCurrChannels = iChannels; | |
| 247 _this->hidden->iCurrNumBufs = iNumBufs; | |
| 248 _this->hidden->iCurrBufSize = iBufSize; | |
| 249 | |
| 250 return (0); | |
| 251 } | |
| 252 | |
| 253 | |
| 254 | |
| 255 void DART_ThreadInit(_THIS) | |
| 256 { | |
| 257 return; | |
| 258 } | |
| 259 | |
| 260 /* This function waits until it is possible to write a full sound buffer */ | |
| 261 void DART_WaitAudio(_THIS) | |
| 262 { | |
| 263 int i; | |
| 264 pMixBufferDesc pBufDesc; | |
| 265 ULONG ulPostCount; | |
| 266 | |
| 267 DosResetEventSem(_this->hidden->hevAudioBufferPlayed, &ulPostCount); | |
| 268 // If there is already an empty buffer, then return now! | |
| 269 for (i=0; i<_this->hidden->iCurrNumBufs; i++) | |
| 270 { | |
| 271 pBufDesc = (pMixBufferDesc) _this->hidden->pMixBuffers[i].ulUserParm; | |
| 272 if (pBufDesc->iBufferUsage == BUFFER_EMPTY) | |
| 273 return; | |
| 274 } | |
| 275 // If there is no empty buffer, wait for one to be empty! | |
| 276 DosWaitEventSem(_this->hidden->hevAudioBufferPlayed, 1000); // Wait max 1 sec!!! Important! | |
| 277 return; | |
| 278 } | |
| 279 | |
| 280 void DART_PlayAudio(_THIS) | |
| 281 { | |
| 282 int iFreeBuf = _this->hidden->iNextFreeBuffer; | |
| 283 pMixBufferDesc pBufDesc; | |
| 284 | |
| 285 pBufDesc = (pMixBufferDesc) _this->hidden->pMixBuffers[iFreeBuf].ulUserParm; | |
| 286 pBufDesc->iBufferUsage = BUFFER_USED; | |
| 287 // Send it to DART to be queued | |
| 288 _this->hidden->MixSetupParms.pmixWrite(_this->hidden->MixSetupParms.ulMixHandle, | |
| 289 &(_this->hidden->pMixBuffers[iFreeBuf]), 1); | |
| 290 | |
| 291 _this->hidden->iLastPlayedBuf = iFreeBuf; | |
| 292 iFreeBuf = (iFreeBuf+1) % _this->hidden->iCurrNumBufs; | |
| 293 _this->hidden->iNextFreeBuffer = iFreeBuf; | |
| 294 } | |
| 295 | |
| 296 Uint8 *DART_GetAudioBuf(_THIS) | |
| 297 { | |
| 298 int iFreeBuf; | |
| 299 Uint8 *pResult; | |
| 300 pMixBufferDesc pBufDesc; | |
| 301 | |
| 302 if (_this) | |
| 303 { | |
| 304 if (_this->hidden) | |
| 305 { | |
| 306 iFreeBuf = _this->hidden->iNextFreeBuffer; | |
| 307 pBufDesc = (pMixBufferDesc) _this->hidden->pMixBuffers[iFreeBuf].ulUserParm; | |
| 308 | |
| 309 if (pBufDesc) | |
| 310 { | |
| 311 if (pBufDesc->iBufferUsage == BUFFER_EMPTY) | |
| 312 { | |
| 313 pResult = _this->hidden->pMixBuffers[iFreeBuf].pBuffer; | |
| 314 return pResult; | |
| 315 } | |
| 316 } else | |
| 317 printf("[DART_GetAudioBuf] : ERROR! pBufDesc = %p\n", pBufDesc); | |
| 318 } else | |
| 319 printf("[DART_GetAudioBuf] : ERROR! _this->hidden = %p\n", _this->hidden); | |
| 320 } else | |
| 321 printf("[DART_GetAudioBuf] : ERROR! _this = %p\n", _this); | |
| 322 return NULL; | |
| 323 } | |
| 324 | |
| 325 void DART_WaitDone(_THIS) | |
| 326 { | |
| 327 pMixBufferDesc pBufDesc; | |
| 328 ULONG ulPostCount; | |
| 329 APIRET rc; | |
| 330 | |
| 331 pBufDesc = (pMixBufferDesc) _this->hidden->pMixBuffers[_this->hidden->iLastPlayedBuf].ulUserParm; | |
| 332 rc = NO_ERROR; | |
| 333 while ((pBufDesc->iBufferUsage != BUFFER_EMPTY) && (rc==NO_ERROR)) | |
| 334 { | |
| 335 DosResetEventSem(_this->hidden->hevAudioBufferPlayed, &ulPostCount); | |
| 336 rc = DosWaitEventSem(_this->hidden->hevAudioBufferPlayed, 1000); // 1 sec timeout! Important! | |
| 337 } | |
| 338 } | |
| 339 | |
| 340 void DART_CloseAudio(_THIS) | |
| 341 { | |
| 342 MCI_GENERIC_PARMS GenericParms; | |
| 343 int rc; | |
| 344 | |
| 345 // Stop DART playback | |
| 346 rc = mciSendCommand(_this->hidden->iCurrDeviceOrd, MCI_STOP, MCI_WAIT, &GenericParms, 0); | |
| 347 if (rc!=MCIERR_SUCCESS) | |
| 348 { | |
| 349 #ifdef SFX_DEBUG_BUILD | |
| 350 printf("Could not stop DART playback!\n"); | |
| 351 fflush(stdout); | |
| 352 #endif | |
| 353 } | |
| 354 | |
| 355 // Close event semaphore | |
| 356 DosCloseEventSem(_this->hidden->hevAudioBufferPlayed); | |
| 357 | |
| 358 // Free memory of buffer descriptions | |
| 359 { | |
| 360 int i; | |
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361 for (i=0; i<_this->hidden->iCurrNumBufs; i++) SDL_free((void *)(_this->hidden->pMixBuffers[i].ulUserParm)); |
| 1190 | 362 } |
| 363 | |
| 364 // Deallocate buffers | |
| 365 rc = mciSendCommand(_this->hidden->iCurrDeviceOrd, MCI_BUFFER, MCI_WAIT | MCI_DEALLOCATE_MEMORY, &(_this->hidden->BufferParms), 0); | |
| 366 | |
| 367 // Free bufferlist | |
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368 SDL_free(_this->hidden->pMixBuffers); _this->hidden->pMixBuffers = NULL; |
| 1190 | 369 |
| 370 // Close dart | |
| 371 rc = mciSendCommand(_this->hidden->iCurrDeviceOrd, MCI_CLOSE, MCI_WAIT, &(GenericParms), 0); | |
| 372 } | |
| 373 | |
| 374 /* Audio driver bootstrap functions */ | |
| 375 | |
| 376 int Audio_Available(void) | |
| 377 { | |
| 378 return(1); | |
| 379 } | |
| 380 | |
| 381 void Audio_DeleteDevice(SDL_AudioDevice *device) | |
| 382 { | |
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383 SDL_free(device->hidden); |
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384 SDL_free(device); |
| 1190 | 385 } |
| 386 | |
| 387 SDL_AudioDevice *Audio_CreateDevice(int devindex) | |
| 388 { | |
| 389 SDL_AudioDevice *this; | |
| 390 | |
| 391 /* Initialize all variables that we clean on shutdown */ | |
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392 this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice)); |
| 1190 | 393 if ( this ) |
| 394 { | |
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395 SDL_memset(this, 0, (sizeof *this)); |
| 1190 | 396 this->hidden = (struct SDL_PrivateAudioData *) |
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397 SDL_malloc((sizeof *this->hidden)); |
| 1190 | 398 } |
| 399 if ( (this == NULL) || (this->hidden == NULL) ) | |
| 400 { | |
| 401 SDL_OutOfMemory(); | |
| 402 if ( this ) | |
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3692456e7b0f
Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents:
1312
diff
changeset
|
403 SDL_free(this); |
| 1190 | 404 return(0); |
| 405 } | |
|
1336
3692456e7b0f
Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents:
1312
diff
changeset
|
406 SDL_memset(this->hidden, 0, (sizeof *this->hidden)); |
| 1190 | 407 |
| 408 /* Set the function pointers */ | |
| 409 this->OpenAudio = DART_OpenAudio; | |
| 410 this->ThreadInit = DART_ThreadInit; | |
| 411 this->WaitAudio = DART_WaitAudio; | |
| 412 this->PlayAudio = DART_PlayAudio; | |
| 413 this->GetAudioBuf = DART_GetAudioBuf; | |
| 414 this->WaitDone = DART_WaitDone; | |
| 415 this->CloseAudio = DART_CloseAudio; | |
| 416 | |
| 417 this->free = Audio_DeleteDevice; | |
| 418 | |
| 419 return this; | |
| 420 } | |
| 421 | |
| 422 AudioBootStrap DART_bootstrap = { | |
| 423 "dart", "OS/2 Direct Audio RouTines (DART)", | |
| 424 Audio_Available, Audio_CreateDevice | |
| 425 }; | |
| 426 |