Mercurial > sdl-ios-xcode
annotate src/audio/dart/SDL_dart.c @ 3950:9d9e15ab1697 SDL-1.2
Check if yasm supports a nasm-specific syntax we use (it doesn't in 0.5.0,
which is still common in Linux distros, and does in 0.6.0). Disable it if we
don't, attempting to fallback to using nasm. Thanks to Mike Frysinger for the
patch.
Fixes Bugzilla #393.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Mon, 04 Jun 2007 11:06:48 +0000 |
| parents | 5b5e549382b3 |
| children | a1b03ba2fcd0 |
| 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 { | |
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78 Uint16 test_format = SDL_FirstAudioFormat(spec->format); |
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79 int valid_datatype = 0; |
| 1190 | 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! | |
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94 SDL_memset(&AmpOpenParms, 0, sizeof(MCI_AMP_OPEN_PARMS)); |
| 1190 | 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 | |
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111 if (spec->channels > 2) |
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112 spec->channels = 2; // !!! FIXME: more than stereo support in OS/2? |
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113 |
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114 while ((!valid_datatype) && (test_format)) { |
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115 spec->format = test_format; |
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116 valid_datatype = 1; |
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117 switch (test_format) { |
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118 case AUDIO_U8: |
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119 // Unsigned 8 bit audio data |
| 1190 | 120 iSilence = 0x80; |
| 121 iBits = 8; | |
| 122 break; | |
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123 |
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124 case AUDIO_S16LSB: |
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125 // Signed 16 bit audio data |
| 1190 | 126 iSilence = 0x00; |
| 127 iBits = 16; | |
| 128 break; | |
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129 |
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130 default: |
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131 valid_datatype = 0; |
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132 test_format = SDL_NextAudioFormat(); |
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133 break; |
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134 } |
| 1190 | 135 } |
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136 |
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137 if (!valid_datatype) { // shouldn't happen, but just in case... |
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138 // Close DART, and exit with error code! |
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139 mciSendCommand(iDeviceOrd, MCI_CLOSE, MCI_WAIT, &GenericParms, 0); |
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140 SDL_SetError("Unsupported audio format"); |
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141 return (-1); |
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142 } |
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143 |
| 1190 | 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! | |
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151 SDL_memset(&(_this->hidden->MixSetupParms), 0, sizeof(MCI_MIXSETUP_PARMS)); |
| 1190 | 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: | |
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183 _this->hidden->pMixBuffers = (MCI_MIX_BUFFER *) SDL_malloc(sizeof(MCI_MIX_BUFFER)*iNumBufs); |
| 1190 | 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! | |
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203 SDL_free(_this->hidden->pMixBuffers); _this->hidden->pMixBuffers = NULL; |
| 1190 | 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 { | |
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213 pMixBufferDesc pBufferDesc = (pMixBufferDesc) SDL_malloc(sizeof(tMixBufferDesc));; |
| 1190 | 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; | |
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220 for (j=0; j<i; j++) SDL_free((void *)(_this->hidden->pMixBuffers[j].ulUserParm)); |
| 1190 | 221 } |
| 222 // and cleanup | |
| 223 mciSendCommand(iDeviceOrd, MCI_BUFFER, MCI_WAIT | MCI_DEALLOCATE_MEMORY, &(_this->hidden->BufferParms), 0); | |
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224 SDL_free(_this->hidden->pMixBuffers); _this->hidden->pMixBuffers = NULL; |
| 1190 | 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.:) | |
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237 SDL_memset(_this->hidden->pMixBuffers[i].pBuffer, iSilence, iBufSize); |
| 1190 | 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; | |
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248 for (i=0; i<iNumBufs; i++) SDL_free((void *)(_this->hidden->pMixBuffers[i].ulUserParm)); |
| 1190 | 249 } |
| 250 mciSendCommand(iDeviceOrd, MCI_BUFFER, MCI_WAIT | MCI_DEALLOCATE_MEMORY, &(_this->hidden->BufferParms), 0); | |
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251 SDL_free(_this->hidden->pMixBuffers); _this->hidden->pMixBuffers = NULL; |
| 1190 | 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; | |
|
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376 for (i=0; i<_this->hidden->iCurrNumBufs; i++) SDL_free((void *)(_this->hidden->pMixBuffers[i].ulUserParm)); |
| 1190 | 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 | |
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383 SDL_free(_this->hidden->pMixBuffers); _this->hidden->pMixBuffers = NULL; |
| 1190 | 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 { | |
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398 SDL_free(device->hidden); |
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399 SDL_free(device); |
| 1190 | 400 } |
| 401 | |
| 402 SDL_AudioDevice *Audio_CreateDevice(int devindex) | |
| 403 { | |
| 404 SDL_AudioDevice *this; | |
| 405 | |
| 406 /* Initialize all variables that we clean on shutdown */ | |
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407 this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice)); |
| 1190 | 408 if ( this ) |
| 409 { | |
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410 SDL_memset(this, 0, (sizeof *this)); |
| 1190 | 411 this->hidden = (struct SDL_PrivateAudioData *) |
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412 SDL_malloc((sizeof *this->hidden)); |
| 1190 | 413 } |
| 414 if ( (this == NULL) || (this->hidden == NULL) ) | |
| 415 { | |
| 416 SDL_OutOfMemory(); | |
| 417 if ( this ) | |
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418 SDL_free(this); |
| 1190 | 419 return(0); |
| 420 } | |
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421 SDL_memset(this->hidden, 0, (sizeof *this->hidden)); |
| 1190 | 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 |