| 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_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 | Uint16 test_format = SDL_FirstAudioFormat(spec->format); |
| 79 | int valid_datatype = 0; |
| 80 | MCI_AMP_OPEN_PARMS AmpOpenParms; |
| 81 | MCI_GENERIC_PARMS GenericParms; |
| 82 | int iDeviceOrd = 0; // Default device to be used |
| 83 | int bOpenShared = 1; // Try opening it shared |
| 84 | int iBits = 16; // Default is 16 bits signed |
| 85 | int iFreq = 44100; // Default is 44KHz |
| 86 | int iChannels = 2; // Default is 2 channels (Stereo) |
| 87 | int iNumBufs = 2; // Number of audio buffers: 2 |
| 88 | int iBufSize; |
| 89 | int iOpenMode; |
| 90 | int iSilence; |
| 91 | int rc; |
| 92 | |
| 93 | // First thing is to try to open a given DART device! |
| 94 | SDL_memset(&AmpOpenParms, 0, sizeof(MCI_AMP_OPEN_PARMS)); |
| 95 | // pszDeviceType should contain the device type in low word, and device ordinal in high word! |
| 96 | AmpOpenParms.pszDeviceType = (PSZ) (MCI_DEVTYPE_AUDIO_AMPMIX | (iDeviceOrd << 16)); |
| 97 | |
| 98 | iOpenMode = MCI_WAIT | MCI_OPEN_TYPE_ID; |
| 99 | if (bOpenShared) iOpenMode |= MCI_OPEN_SHAREABLE; |
| 100 | |
| 101 | rc = mciSendCommand( 0, MCI_OPEN, |
| 102 | iOpenMode, |
| 103 | (PVOID) &AmpOpenParms, 0); |
| 104 | if (rc!=MCIERR_SUCCESS) // No audio available?? |
| 105 | return (-1); |
| 106 | // Save the device ID we got from DART! |
| 107 | // We will use this in the next calls! |
| 108 | iDeviceOrd = AmpOpenParms.usDeviceID; |
| 109 | |
| 110 | // Determine the audio parameters from the AudioSpec |
| 111 | if (spec->channels > 2) |
| 112 | spec->channels = 2; // !!! FIXME: more than stereo support in OS/2? |
| 113 | |
| 114 | while ((!valid_datatype) && (test_format)) { |
| 115 | spec->format = test_format; |
| 116 | valid_datatype = 1; |
| 117 | switch (test_format) { |
| 118 | case AUDIO_U8: |
| 119 | // Unsigned 8 bit audio data |
| 120 | iSilence = 0x80; |
| 121 | iBits = 8; |
| 122 | break; |
| 123 | |
| 124 | case AUDIO_S16LSB: |
| 125 | // Signed 16 bit audio data |
| 126 | iSilence = 0x00; |
| 127 | iBits = 16; |
| 128 | break; |
| 129 | |
| 130 | default: |
| 131 | valid_datatype = 0; |
| 132 | test_format = SDL_NextAudioFormat(); |
| 133 | break; |
| 134 | } |
| 135 | } |
| 136 | |
| 137 | if (!valid_datatype) { // shouldn't happen, but just in case... |
| 138 | // Close DART, and exit with error code! |
| 139 | mciSendCommand(iDeviceOrd, MCI_CLOSE, MCI_WAIT, &GenericParms, 0); |
| 140 | SDL_SetError("Unsupported audio format"); |
| 141 | return (-1); |
| 142 | } |
| 143 | |
| 144 | iFreq = spec->freq; |
| 145 | iChannels = spec->channels; |
| 146 | /* Update the fragment size as size in bytes */ |
| 147 | SDL_CalculateAudioSpec(spec); |
| 148 | iBufSize = spec->size; |
| 149 | |
| 150 | // Now query this device if it supports the given freq/bits/channels! |
| 151 | SDL_memset(&(_this->hidden->MixSetupParms), 0, sizeof(MCI_MIXSETUP_PARMS)); |
| 152 | _this->hidden->MixSetupParms.ulBitsPerSample = iBits; |
| 153 | _this->hidden->MixSetupParms.ulFormatTag = MCI_WAVE_FORMAT_PCM; |
| 154 | _this->hidden->MixSetupParms.ulSamplesPerSec = iFreq; |
| 155 | _this->hidden->MixSetupParms.ulChannels = iChannels; |
| 156 | _this->hidden->MixSetupParms.ulFormatMode = MCI_PLAY; |
| 157 | _this->hidden->MixSetupParms.ulDeviceType = MCI_DEVTYPE_WAVEFORM_AUDIO; |
| 158 | _this->hidden->MixSetupParms.pmixEvent = DARTEventFunc; |
| 159 | rc = mciSendCommand (iDeviceOrd, MCI_MIXSETUP, |
| 160 | MCI_WAIT | MCI_MIXSETUP_QUERYMODE, |
| 161 | &(_this->hidden->MixSetupParms), 0); |
| 162 | if (rc!=MCIERR_SUCCESS) |
| 163 | { // The device cannot handle this format! |
| 164 | // Close DART, and exit with error code! |
| 165 | mciSendCommand(iDeviceOrd, MCI_CLOSE, MCI_WAIT, &GenericParms, 0); |
| 166 | SDL_SetError("Audio device doesn't support requested audio format"); |
| 167 | return(-1); |
| 168 | } |
| 169 | // The device can handle this format, so initialize! |
| 170 | rc = mciSendCommand(iDeviceOrd, MCI_MIXSETUP, |
| 171 | MCI_WAIT | MCI_MIXSETUP_INIT, |
| 172 | &(_this->hidden->MixSetupParms), 0); |
| 173 | if (rc!=MCIERR_SUCCESS) |
| 174 | { // The device could not be opened! |
| 175 | // Close DART, and exit with error code! |
| 176 | mciSendCommand(iDeviceOrd, MCI_CLOSE, MCI_WAIT, &GenericParms, 0); |
| 177 | SDL_SetError("Audio device could not be set up"); |
| 178 | return(-1); |
| 179 | } |
| 180 | // Ok, the device is initialized. |
| 181 | // Now we should allocate buffers. For this, we need a place where |
| 182 | // the buffer descriptors will be: |
| 183 | _this->hidden->pMixBuffers = (MCI_MIX_BUFFER *) SDL_malloc(sizeof(MCI_MIX_BUFFER)*iNumBufs); |
| 184 | if (!(_this->hidden->pMixBuffers)) |
| 185 | { // Not enough memory! |
| 186 | // Close DART, and exit with error code! |
| 187 | mciSendCommand(iDeviceOrd, MCI_CLOSE, MCI_WAIT, &GenericParms, 0); |
| 188 | SDL_SetError("Not enough memory for audio buffer descriptors"); |
| 189 | return(-1); |
| 190 | } |
| 191 | // Now that we have the place for buffer list, we can ask DART for the |
| 192 | // buffers! |
| 193 | _this->hidden->BufferParms.ulNumBuffers = iNumBufs; // Number of buffers |
| 194 | _this->hidden->BufferParms.ulBufferSize = iBufSize; // each with this size |
| 195 | _this->hidden->BufferParms.pBufList = _this->hidden->pMixBuffers; // getting descriptorts into this list |
| 196 | // Allocate buffers! |
| 197 | rc = mciSendCommand(iDeviceOrd, MCI_BUFFER, |
| 198 | MCI_WAIT | MCI_ALLOCATE_MEMORY, |
| 199 | &(_this->hidden->BufferParms), 0); |
| 200 | if ((rc!=MCIERR_SUCCESS) || (iNumBufs != _this->hidden->BufferParms.ulNumBuffers) || (_this->hidden->BufferParms.ulBufferSize==0)) |
| 201 | { // Could not allocate memory! |
| 202 | // Close DART, and exit with error code! |
| 203 | SDL_free(_this->hidden->pMixBuffers); _this->hidden->pMixBuffers = NULL; |
| 204 | mciSendCommand(iDeviceOrd, MCI_CLOSE, MCI_WAIT, &GenericParms, 0); |
| 205 | SDL_SetError("DART could not allocate buffers"); |
| 206 | return(-1); |
| 207 | } |
| 208 | // Ok, we have all the buffers allocated, let's mark them! |
| 209 | { |
| 210 | int i; |
| 211 | for (i=0; i<iNumBufs; i++) |
| 212 | { |
| 213 | pMixBufferDesc pBufferDesc = (pMixBufferDesc) SDL_malloc(sizeof(tMixBufferDesc));; |
| 214 | // Check if this buffer was really allocated by DART |
| 215 | if ((!(_this->hidden->pMixBuffers[i].pBuffer)) || (!pBufferDesc)) |
| 216 | { // Wrong buffer! |
| 217 | // Close DART, and exit with error code! |
| 218 | // Free buffer descriptions |
| 219 | { int j; |
| 220 | for (j=0; j<i; j++) SDL_free((void *)(_this->hidden->pMixBuffers[j].ulUserParm)); |
| 221 | } |
| 222 | // and cleanup |
| 223 | mciSendCommand(iDeviceOrd, MCI_BUFFER, MCI_WAIT | MCI_DEALLOCATE_MEMORY, &(_this->hidden->BufferParms), 0); |
| 224 | SDL_free(_this->hidden->pMixBuffers); _this->hidden->pMixBuffers = NULL; |
| 225 | mciSendCommand(iDeviceOrd, MCI_CLOSE, MCI_WAIT, &GenericParms, 0); |
| 226 | SDL_SetError("Error at internal buffer check"); |
| 227 | return(-1); |
| 228 | } |
| 229 | pBufferDesc->iBufferUsage = BUFFER_EMPTY; |
| 230 | pBufferDesc->pSDLAudioDevice = _this; |
| 231 | |
| 232 | _this->hidden->pMixBuffers[i].ulBufferLength = _this->hidden->BufferParms.ulBufferSize; |
| 233 | _this->hidden->pMixBuffers[i].ulUserParm = (ULONG) pBufferDesc; // User parameter: Description of buffer |
| 234 | _this->hidden->pMixBuffers[i].ulFlags = 0; // Some stuff should be flagged here for DART, like end of |
| 235 | // audio data, but as we will continously send |
| 236 | // audio data, there will be no end.:) |
| 237 | SDL_memset(_this->hidden->pMixBuffers[i].pBuffer, iSilence, iBufSize); |
| 238 | } |
| 239 | } |
| 240 | _this->hidden->iNextFreeBuffer = 0; |
| 241 | _this->hidden->iLastPlayedBuf = -1; |
| 242 | // Create event semaphore |
| 243 | if (DosCreateEventSem(NULL, &(_this->hidden->hevAudioBufferPlayed), 0, FALSE)!=NO_ERROR) |
| 244 | { |
| 245 | // Could not create event semaphore! |
| 246 | { |
| 247 | int i; |
| 248 | for (i=0; i<iNumBufs; i++) SDL_free((void *)(_this->hidden->pMixBuffers[i].ulUserParm)); |
| 249 | } |
| 250 | mciSendCommand(iDeviceOrd, MCI_BUFFER, MCI_WAIT | MCI_DEALLOCATE_MEMORY, &(_this->hidden->BufferParms), 0); |
| 251 | SDL_free(_this->hidden->pMixBuffers); _this->hidden->pMixBuffers = NULL; |
| 252 | mciSendCommand(iDeviceOrd, MCI_CLOSE, MCI_WAIT, &GenericParms, 0); |
| 253 | SDL_SetError("Could not create event semaphore"); |
| 254 | return(-1); |
| 255 | } |
| 256 | |
| 257 | // Store the new settings in global variables |
| 258 | _this->hidden->iCurrDeviceOrd = iDeviceOrd; |
| 259 | _this->hidden->iCurrFreq = iFreq; |
| 260 | _this->hidden->iCurrBits = iBits; |
| 261 | _this->hidden->iCurrChannels = iChannels; |
| 262 | _this->hidden->iCurrNumBufs = iNumBufs; |
| 263 | _this->hidden->iCurrBufSize = iBufSize; |
| 264 | |
| 265 | return (0); |
| 266 | } |
| 267 | |
| 268 | |
| 269 | |
| 270 | void DART_ThreadInit(_THIS) |
| 271 | { |
| 272 | return; |
| 273 | } |
| 274 | |
| 275 | /* This function waits until it is possible to write a full sound buffer */ |
| 276 | void DART_WaitAudio(_THIS) |
| 277 | { |
| 278 | int i; |
| 279 | pMixBufferDesc pBufDesc; |
| 280 | ULONG ulPostCount; |
| 281 | |
| 282 | DosResetEventSem(_this->hidden->hevAudioBufferPlayed, &ulPostCount); |
| 283 | // If there is already an empty buffer, then return now! |
| 284 | for (i=0; i<_this->hidden->iCurrNumBufs; i++) |
| 285 | { |
| 286 | pBufDesc = (pMixBufferDesc) _this->hidden->pMixBuffers[i].ulUserParm; |
| 287 | if (pBufDesc->iBufferUsage == BUFFER_EMPTY) |
| 288 | return; |
| 289 | } |
| 290 | // If there is no empty buffer, wait for one to be empty! |
| 291 | DosWaitEventSem(_this->hidden->hevAudioBufferPlayed, 1000); // Wait max 1 sec!!! Important! |
| 292 | return; |
| 293 | } |
| 294 | |
| 295 | void DART_PlayAudio(_THIS) |
| 296 | { |
| 297 | int iFreeBuf = _this->hidden->iNextFreeBuffer; |
| 298 | pMixBufferDesc pBufDesc; |
| 299 | |
| 300 | pBufDesc = (pMixBufferDesc) _this->hidden->pMixBuffers[iFreeBuf].ulUserParm; |
| 301 | pBufDesc->iBufferUsage = BUFFER_USED; |
| 302 | // Send it to DART to be queued |
| 303 | _this->hidden->MixSetupParms.pmixWrite(_this->hidden->MixSetupParms.ulMixHandle, |
| 304 | &(_this->hidden->pMixBuffers[iFreeBuf]), 1); |
| 305 | |
| 306 | _this->hidden->iLastPlayedBuf = iFreeBuf; |
| 307 | iFreeBuf = (iFreeBuf+1) % _this->hidden->iCurrNumBufs; |
| 308 | _this->hidden->iNextFreeBuffer = iFreeBuf; |
| 309 | } |
| 310 | |
| 311 | Uint8 *DART_GetAudioBuf(_THIS) |
| 312 | { |
| 313 | int iFreeBuf; |
| 314 | Uint8 *pResult; |
| 315 | pMixBufferDesc pBufDesc; |
| 316 | |
| 317 | if (_this) |
| 318 | { |
| 319 | if (_this->hidden) |
| 320 | { |
| 321 | iFreeBuf = _this->hidden->iNextFreeBuffer; |
| 322 | pBufDesc = (pMixBufferDesc) _this->hidden->pMixBuffers[iFreeBuf].ulUserParm; |
| 323 | |
| 324 | if (pBufDesc) |
| 325 | { |
| 326 | if (pBufDesc->iBufferUsage == BUFFER_EMPTY) |
| 327 | { |
| 328 | pResult = _this->hidden->pMixBuffers[iFreeBuf].pBuffer; |
| 329 | return pResult; |
| 330 | } |
| 331 | } else |
| 332 | printf("[DART_GetAudioBuf] : ERROR! pBufDesc = %p\n", pBufDesc); |
| 333 | } else |
| 334 | printf("[DART_GetAudioBuf] : ERROR! _this->hidden = %p\n", _this->hidden); |
| 335 | } else |
| 336 | printf("[DART_GetAudioBuf] : ERROR! _this = %p\n", _this); |
| 337 | return NULL; |
| 338 | } |
| 339 | |
| 340 | void DART_WaitDone(_THIS) |
| 341 | { |
| 342 | pMixBufferDesc pBufDesc; |
| 343 | ULONG ulPostCount; |
| 344 | APIRET rc; |
| 345 | |
| 346 | pBufDesc = (pMixBufferDesc) _this->hidden->pMixBuffers[_this->hidden->iLastPlayedBuf].ulUserParm; |
| 347 | rc = NO_ERROR; |
| 348 | while ((pBufDesc->iBufferUsage != BUFFER_EMPTY) && (rc==NO_ERROR)) |
| 349 | { |
| 350 | DosResetEventSem(_this->hidden->hevAudioBufferPlayed, &ulPostCount); |
| 351 | rc = DosWaitEventSem(_this->hidden->hevAudioBufferPlayed, 1000); // 1 sec timeout! Important! |
| 352 | } |
| 353 | } |
| 354 | |
| 355 | void DART_CloseAudio(_THIS) |
| 356 | { |
| 357 | MCI_GENERIC_PARMS GenericParms; |
| 358 | int rc; |
| 359 | |
| 360 | // Stop DART playback |
| 361 | rc = mciSendCommand(_this->hidden->iCurrDeviceOrd, MCI_STOP, MCI_WAIT, &GenericParms, 0); |
| 362 | if (rc!=MCIERR_SUCCESS) |
| 363 | { |
| 364 | #ifdef SFX_DEBUG_BUILD |
| 365 | printf("Could not stop DART playback!\n"); |
| 366 | fflush(stdout); |
| 367 | #endif |
| 368 | } |
| 369 | |
| 370 | // Close event semaphore |
| 371 | DosCloseEventSem(_this->hidden->hevAudioBufferPlayed); |
| 372 | |
| 373 | // Free memory of buffer descriptions |
| 374 | { |
| 375 | int i; |
| 376 | for (i=0; i<_this->hidden->iCurrNumBufs; i++) SDL_free((void *)(_this->hidden->pMixBuffers[i].ulUserParm)); |
| 377 | } |
| 378 | |
| 379 | // Deallocate buffers |
| 380 | rc = mciSendCommand(_this->hidden->iCurrDeviceOrd, MCI_BUFFER, MCI_WAIT | MCI_DEALLOCATE_MEMORY, &(_this->hidden->BufferParms), 0); |
| 381 | |
| 382 | // Free bufferlist |
| 383 | SDL_free(_this->hidden->pMixBuffers); _this->hidden->pMixBuffers = NULL; |
| 384 | |
| 385 | // Close dart |
| 386 | rc = mciSendCommand(_this->hidden->iCurrDeviceOrd, MCI_CLOSE, MCI_WAIT, &(GenericParms), 0); |
| 387 | } |
| 388 | |
| 389 | /* Audio driver bootstrap functions */ |
| 390 | |
| 391 | int Audio_Available(void) |
| 392 | { |
| 393 | return(1); |
| 394 | } |
| 395 | |
| 396 | void Audio_DeleteDevice(SDL_AudioDevice *device) |
| 397 | { |
| 398 | SDL_free(device->hidden); |
| 399 | SDL_free(device); |
| 400 | } |
| 401 | |
| 402 | SDL_AudioDevice *Audio_CreateDevice(int devindex) |
| 403 | { |
| 404 | SDL_AudioDevice *this; |
| 405 | |
| 406 | /* Initialize all variables that we clean on shutdown */ |
| 407 | this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice)); |
| 408 | if ( this ) |
| 409 | { |
| 410 | SDL_memset(this, 0, (sizeof *this)); |
| 411 | this->hidden = (struct SDL_PrivateAudioData *) |
| 412 | SDL_malloc((sizeof *this->hidden)); |
| 413 | } |
| 414 | if ( (this == NULL) || (this->hidden == NULL) ) |
| 415 | { |
| 416 | SDL_OutOfMemory(); |
| 417 | if ( this ) |
| 418 | SDL_free(this); |
| 419 | return(0); |
| 420 | } |
| 421 | SDL_memset(this->hidden, 0, (sizeof *this->hidden)); |
| 422 | |
| 423 | /* Set the function pointers */ |
| 424 | this->OpenAudio = DART_OpenAudio; |
| 425 | this->ThreadInit = DART_ThreadInit; |
| 426 | this->WaitAudio = DART_WaitAudio; |
| 427 | this->PlayAudio = DART_PlayAudio; |
| 428 | this->GetAudioBuf = DART_GetAudioBuf; |
| 429 | this->WaitDone = DART_WaitDone; |
| 430 | this->CloseAudio = DART_CloseAudio; |
| 431 | |
| 432 | this->free = Audio_DeleteDevice; |
| 433 | |
| 434 | return this; |
| 435 | } |
| 436 | |
| 437 | AudioBootStrap DART_bootstrap = { |
| 438 | "dart", "OS/2 Direct Audio RouTines (DART)", |
| 439 | Audio_Available, Audio_CreateDevice |
| 440 | }; |
| 441 | |