Mercurial > sdl-ios-xcode
annotate src/audio/macrom/SDL_romaudio.c @ 297:f6ffac90895c
Updated copyright information for 2002
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Wed, 06 Mar 2002 11:23:08 +0000 |
| parents | e8157fcb3114 |
| children | b7e8038e40ae |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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Updated copyright information for 2002
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
| 6 modify it under the terms of the GNU Library General Public | |
| 7 License as published by the Free Software Foundation; either | |
| 8 version 2 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 Library General Public License for more details. | |
| 14 | |
| 15 You should have received a copy of the GNU Library General Public | |
| 16 License along with this library; if not, write to the Free | |
| 17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 18 | |
| 19 Sam Lantinga | |
|
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20 slouken@libsdl.org |
| 0 | 21 */ |
| 22 | |
| 23 #ifdef SAVE_RCSID | |
| 24 static char rcsid = | |
| 25 "@(#) $Id$"; | |
| 26 #endif | |
| 27 | |
| 28 #if TARGET_API_MAC_CARBON | |
| 29 # include <Carbon.h> | |
| 30 #else | |
| 31 # include <Sound.h> /* SoundManager interface */ | |
| 32 # include <Gestalt.h> | |
| 33 #endif | |
| 34 | |
| 35 #include <stdlib.h> | |
| 36 #include <stdio.h> | |
| 37 | |
| 38 #include "SDL_endian.h" | |
| 39 #include "SDL_audio.h" | |
| 40 #include "SDL_audio_c.h" | |
| 41 #include "SDL_audiomem.h" | |
| 42 #include "SDL_sysaudio.h" | |
| 43 #include "SDL_romaudio.h" | |
| 44 | |
| 45 /* Audio driver functions */ | |
| 46 | |
| 47 static void Mac_CloseAudio(_THIS); | |
| 48 static int Mac_OpenAudio(_THIS, SDL_AudioSpec *spec); | |
| 49 | |
| 50 /* Audio driver bootstrap functions */ | |
| 51 | |
| 52 | |
| 53 static int Audio_Available(void) | |
| 54 { | |
| 55 return(1); | |
| 56 } | |
| 57 | |
| 58 static void Audio_DeleteDevice(SDL_AudioDevice *device) | |
| 59 { | |
| 60 free(device->hidden); | |
| 61 free(device); | |
| 62 } | |
| 63 | |
| 64 static SDL_AudioDevice *Audio_CreateDevice(int devindex) | |
| 65 { | |
| 66 SDL_AudioDevice *this; | |
| 67 | |
| 68 /* Initialize all variables that we clean on shutdown */ | |
| 69 this = (SDL_AudioDevice *)malloc(sizeof(SDL_AudioDevice)); | |
| 70 if ( this ) { | |
| 71 memset(this, 0, (sizeof *this)); | |
| 72 this->hidden = (struct SDL_PrivateAudioData *) | |
| 73 malloc((sizeof *this->hidden)); | |
| 74 } | |
| 75 if ( (this == NULL) || (this->hidden == NULL) ) { | |
| 76 SDL_OutOfMemory(); | |
| 77 if ( this ) { | |
| 78 free(this); | |
| 79 } | |
| 80 return(0); | |
| 81 } | |
| 82 memset(this->hidden, 0, (sizeof *this->hidden)); | |
| 83 | |
| 84 /* Set the function pointers */ | |
| 85 this->OpenAudio = Mac_OpenAudio; | |
| 86 this->CloseAudio = Mac_CloseAudio; | |
| 87 this->free = Audio_DeleteDevice; | |
| 88 | |
| 89 return this; | |
| 90 } | |
| 91 | |
| 92 AudioBootStrap SNDMGR_bootstrap = { | |
| 93 "sndmgr", "MacOS SoundManager 3.0", | |
| 94 Audio_Available, Audio_CreateDevice | |
| 95 }; | |
| 96 | |
| 97 #if TARGET_API_MAC_CARBON | |
| 98 | |
| 99 static UInt8 *buffer[2]; | |
| 100 static volatile UInt32 running = 0; | |
| 101 static CmpSoundHeader header; | |
| 102 | |
| 103 static void callBackProc (SndChannel *chan, SndCommand *cmd_passed ) { | |
| 104 | |
| 105 UInt32 fill_me, play_me; | |
| 106 SndCommand cmd; | |
| 107 SDL_AudioDevice *audio = (SDL_AudioDevice *)chan->userInfo; | |
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108 |
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109 fill_me = cmd_passed->param2; /* buffer that has just finished playing, so fill it */ |
| 0 | 110 play_me = ! fill_me; /* filled buffer to play _now_ */ |
| 111 | |
| 112 if ( ! audio->enabled ) { | |
| 113 return; | |
| 114 } | |
| 115 | |
| 116 header.samplePtr = (Ptr)buffer[play_me]; | |
| 117 | |
| 118 cmd.cmd = bufferCmd; | |
| 119 cmd.param1 = 0; | |
| 120 cmd.param2 = (long)&header; | |
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121 |
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122 SndDoCommand (chan, &cmd, 0); |
| 0 | 123 |
| 124 memset (buffer[fill_me], 0, audio->spec.size); | |
| 125 | |
| 126 if ( ! audio->paused ) { | |
| 127 if ( audio->convert.needed ) { | |
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128 #if MACOSX |
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129 SDL_mutexP(audio->mixer_lock); |
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130 #endif |
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131 audio->spec.callback(audio->spec.userdata, |
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132 (Uint8 *)audio->convert.buf,audio->convert.len); |
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133 #if MACOSX |
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134 SDL_mutexV(audio->mixer_lock); |
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135 #endif |
| 0 | 136 SDL_ConvertAudio(&audio->convert); |
| 137 #if 0 | |
| 138 if ( audio->convert.len_cvt != audio->spec.size ) { | |
| 139 /* Uh oh... probably crashes here; */ | |
| 140 } | |
| 141 #endif | |
| 142 memcpy(buffer[fill_me], audio->convert.buf, | |
| 143 audio->convert.len_cvt); | |
| 144 } else { | |
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145 #if MACOSX |
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146 SDL_mutexP(audio->mixer_lock); |
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147 #endif |
| 0 | 148 audio->spec.callback(audio->spec.userdata, |
| 149 (Uint8 *)buffer[fill_me], audio->spec.size); | |
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150 #if MACOSX |
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151 SDL_mutexV(audio->mixer_lock); |
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152 #endif |
| 0 | 153 } |
| 154 } | |
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155 |
| 0 | 156 if ( running ) { |
| 157 | |
| 158 cmd.cmd = callBackCmd; | |
| 159 cmd.param1 = 0; | |
| 160 cmd.param2 = play_me; | |
| 161 | |
| 162 SndDoCommand (chan, &cmd, 0); | |
| 163 } | |
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164 |
| 0 | 165 } |
| 166 | |
| 167 static int Mac_OpenAudio(_THIS, SDL_AudioSpec *spec) { | |
| 168 | |
| 169 SndCallBackUPP callback; | |
| 170 int sample_bits; | |
| 171 int i; | |
| 172 long initOptions; | |
| 173 | |
| 174 /* Very few conversions are required, but... */ | |
| 175 switch (spec->format) { | |
| 176 case AUDIO_S8: | |
| 177 spec->format = AUDIO_U8; | |
| 178 break; | |
| 179 case AUDIO_U16LSB: | |
| 180 spec->format = AUDIO_S16LSB; | |
| 181 break; | |
| 182 case AUDIO_U16MSB: | |
| 183 spec->format = AUDIO_S16MSB; | |
| 184 break; | |
| 185 } | |
| 186 SDL_CalculateAudioSpec(spec); | |
| 187 | |
| 188 /* initialize bufferCmd header */ | |
| 189 memset (&header, 0, sizeof(header)); | |
| 190 callback = NewSndCallBackUPP (callBackProc); | |
| 191 sample_bits = spec->size / spec->samples / spec->channels * 8; | |
| 192 | |
| 193 #ifdef DEBUG_AUDIO | |
| 194 fprintf(stderr, | |
| 195 "Audio format 0x%x, channels = %d, sample_bits = %d, frequency = %d\n", | |
| 196 spec->format, spec->channels, sample_bits, spec->freq); | |
| 197 #endif /* DEBUG_AUDIO */ | |
| 198 | |
| 199 header.numChannels = spec->channels; | |
| 200 header.sampleSize = sample_bits; | |
| 201 header.sampleRate = spec->freq << 16; | |
| 202 header.numFrames = spec->samples; | |
| 203 header.encode = cmpSH; | |
| 204 | |
| 205 /* Note that we install the 16bitLittleEndian Converter if needed. */ | |
| 206 if ( spec->format == 0x8010 ) { | |
| 207 header.compressionID = fixedCompression; | |
| 208 header.format = k16BitLittleEndianFormat; | |
| 209 } | |
| 210 | |
| 211 /* allocate 2 buffers */ | |
| 212 for (i=0; i<2; i++) { | |
| 213 buffer[i] = (UInt8*)malloc (sizeof(UInt8) * spec->size); | |
| 214 if (buffer[i] == NULL) { | |
| 215 SDL_OutOfMemory(); | |
| 216 return (-1); | |
| 217 } | |
| 218 memset (buffer[i], 0, spec->size); | |
| 219 } | |
| 220 | |
| 221 /* Create the sound manager channel */ | |
| 222 channel = (SndChannelPtr)malloc(sizeof(*channel)); | |
| 223 if ( channel == NULL ) { | |
| 224 SDL_OutOfMemory(); | |
| 225 return(-1); | |
| 226 } | |
| 227 if ( spec->channels >= 2 ) { | |
| 228 initOptions = initStereo; | |
| 229 } else { | |
| 230 initOptions = initMono; | |
| 231 } | |
| 232 channel->userInfo = (long)this; | |
| 233 channel->qLength = 128; | |
| 234 if ( SndNewChannel(&channel, sampledSynth, initOptions, callback) != | |
| 235 noErr ) { | |
| 236 SDL_SetError("Unable to create audio channel"); | |
| 237 free(channel); | |
| 238 channel = NULL; | |
| 239 return(-1); | |
| 240 } | |
| 241 | |
| 242 /* start playback */ | |
| 243 { | |
| 244 SndCommand cmd; | |
| 245 cmd.cmd = callBackCmd; | |
| 246 cmd.param2 = 0; | |
| 247 running = 1; | |
| 248 SndDoCommand (channel, &cmd, 0); | |
| 249 } | |
| 250 | |
| 251 return 1; | |
| 252 } | |
| 253 | |
| 254 static void Mac_CloseAudio(_THIS) { | |
| 255 | |
| 256 int i; | |
| 257 | |
| 258 running = 0; | |
| 259 | |
| 260 if (channel) { | |
| 261 SndDisposeChannel (channel, true); | |
| 262 channel = NULL; | |
| 263 } | |
| 264 | |
| 265 for ( i=0; i<2; ++i ) { | |
| 266 if ( buffer[i] ) { | |
| 267 free(buffer[i]); | |
| 268 buffer[i] = NULL; | |
| 269 } | |
| 270 } | |
| 271 } | |
| 272 | |
| 273 #else /* !TARGET_API_MAC_CARBON */ | |
| 274 | |
| 275 /* This function is called by Sound Manager when it has exhausted one of | |
| 276 the buffers, so we'll zero it to silence and fill it with audio if | |
| 277 we're not paused. | |
| 278 */ | |
| 279 static pascal | |
| 280 void sndDoubleBackProc (SndChannelPtr chan, SndDoubleBufferPtr newbuf) | |
| 281 { | |
| 282 SDL_AudioDevice *audio = (SDL_AudioDevice *)newbuf->dbUserInfo[0]; | |
| 283 | |
| 284 /* If audio is quitting, don't do anything */ | |
| 285 if ( ! audio->enabled ) { | |
| 286 return; | |
| 287 } | |
| 288 memset (newbuf->dbSoundData, 0, audio->spec.size); | |
| 289 newbuf->dbNumFrames = audio->spec.samples; | |
| 290 if ( ! audio->paused ) { | |
| 291 if ( audio->convert.needed ) { | |
| 292 audio->spec.callback(audio->spec.userdata, | |
| 293 (Uint8 *)audio->convert.buf,audio->convert.len); | |
| 294 SDL_ConvertAudio(&audio->convert); | |
| 295 #if 0 | |
| 296 if ( audio->convert.len_cvt != audio->spec.size ) { | |
| 297 /* Uh oh... probably crashes here */; | |
| 298 } | |
| 299 #endif | |
| 300 memcpy(newbuf->dbSoundData, audio->convert.buf, | |
| 301 audio->convert.len_cvt); | |
| 302 } else { | |
| 303 audio->spec.callback(audio->spec.userdata, | |
| 304 (Uint8 *)newbuf->dbSoundData, audio->spec.size); | |
| 305 } | |
| 306 } | |
| 307 newbuf->dbFlags |= dbBufferReady; | |
| 308 } | |
| 309 | |
| 310 static int DoubleBufferAudio_Available(void) | |
| 311 { | |
| 312 int available; | |
| 313 NumVersion sndversion; | |
| 314 long response; | |
| 315 | |
| 316 available = 0; | |
| 317 sndversion = SndSoundManagerVersion(); | |
| 318 if ( sndversion.majorRev >= 3 ) { | |
| 319 if ( Gestalt(gestaltSoundAttr, &response) == noErr ) { | |
| 320 if ( (response & (1 << gestaltSndPlayDoubleBuffer)) ) { | |
| 321 available = 1; | |
| 322 } | |
| 323 } | |
| 324 } else { | |
| 325 if ( Gestalt(gestaltSoundAttr, &response) == noErr ) { | |
| 326 if ( (response & (1 << gestaltHasASC)) ) { | |
| 327 available = 1; | |
| 328 } | |
| 329 } | |
| 330 } | |
| 331 return(available); | |
| 332 } | |
| 333 | |
| 334 static void Mac_CloseAudio(_THIS) | |
| 335 { | |
| 336 int i; | |
| 337 | |
| 338 if ( channel != NULL ) { | |
| 339 #if 0 | |
| 340 SCStatus status; | |
| 341 | |
| 342 /* Wait for audio to complete */ | |
| 343 do { | |
| 344 SndChannelStatus(channel, sizeof(status), &status); | |
| 345 } while ( status.scChannelBusy ); | |
| 346 #endif | |
| 347 /* Clean up the audio channel */ | |
| 348 SndDisposeChannel(channel, true); | |
| 349 channel = NULL; | |
| 350 } | |
| 351 for ( i=0; i<2; ++i ) { | |
| 352 if ( audio_buf[i] ) { | |
| 353 free(audio_buf[i]); | |
| 354 audio_buf[i] = NULL; | |
| 355 } | |
| 356 } | |
| 357 } | |
| 358 | |
| 359 static int Mac_OpenAudio(_THIS, SDL_AudioSpec *spec) | |
| 360 { | |
| 361 SndDoubleBufferHeader2 audio_dbh; | |
| 362 int i; | |
| 363 long initOptions; | |
| 364 int sample_bits; | |
| 365 SndDoubleBackUPP doubleBackProc; | |
| 366 | |
| 367 /* Check to make sure double-buffered audio is available */ | |
| 368 if ( ! DoubleBufferAudio_Available() ) { | |
| 369 SDL_SetError("Sound manager doesn't support double-buffering"); | |
| 370 return(-1); | |
| 371 } | |
| 372 | |
| 373 /* Very few conversions are required, but... */ | |
| 374 switch (spec->format) { | |
| 375 case AUDIO_S8: | |
| 376 spec->format = AUDIO_U8; | |
| 377 break; | |
| 378 case AUDIO_U16LSB: | |
| 379 spec->format = AUDIO_S16LSB; | |
| 380 break; | |
| 381 case AUDIO_U16MSB: | |
| 382 spec->format = AUDIO_S16MSB; | |
| 383 break; | |
| 384 } | |
| 385 SDL_CalculateAudioSpec(spec); | |
| 386 | |
| 387 /* initialize the double-back header */ | |
| 388 memset(&audio_dbh, 0, sizeof(audio_dbh)); | |
| 389 doubleBackProc = NewSndDoubleBackProc (sndDoubleBackProc); | |
| 390 sample_bits = spec->size / spec->samples / spec->channels * 8; | |
| 391 | |
| 392 audio_dbh.dbhNumChannels = spec->channels; | |
| 393 audio_dbh.dbhSampleSize = sample_bits; | |
| 394 audio_dbh.dbhCompressionID = 0; | |
| 395 audio_dbh.dbhPacketSize = 0; | |
| 396 audio_dbh.dbhSampleRate = spec->freq << 16; | |
| 397 audio_dbh.dbhDoubleBack = doubleBackProc; | |
| 398 audio_dbh.dbhFormat = 0; | |
| 399 | |
| 400 /* Note that we install the 16bitLittleEndian Converter if needed. */ | |
| 401 if ( spec->format == 0x8010 ) { | |
| 402 audio_dbh.dbhCompressionID = fixedCompression; | |
| 403 audio_dbh.dbhFormat = k16BitLittleEndianFormat; | |
| 404 } | |
| 405 | |
| 406 /* allocate the 2 double-back buffers */ | |
| 407 for ( i=0; i<2; ++i ) { | |
| 408 audio_buf[i] = calloc(1, sizeof(SndDoubleBuffer)+spec->size); | |
| 409 if ( audio_buf[i] == NULL ) { | |
| 410 SDL_OutOfMemory(); | |
| 411 return(-1); | |
| 412 } | |
| 413 audio_buf[i]->dbNumFrames = spec->samples; | |
| 414 audio_buf[i]->dbFlags = dbBufferReady; | |
| 415 audio_buf[i]->dbUserInfo[0] = (long)this; | |
| 416 audio_dbh.dbhBufferPtr[i] = audio_buf[i]; | |
| 417 } | |
| 418 | |
| 419 /* Create the sound manager channel */ | |
| 420 channel = (SndChannelPtr)malloc(sizeof(*channel)); | |
| 421 if ( channel == NULL ) { | |
| 422 SDL_OutOfMemory(); | |
| 423 return(-1); | |
| 424 } | |
| 425 if ( spec->channels >= 2 ) { | |
| 426 initOptions = initStereo; | |
| 427 } else { | |
| 428 initOptions = initMono; | |
| 429 } | |
| 430 channel->userInfo = 0; | |
| 431 channel->qLength = 128; | |
| 432 if ( SndNewChannel(&channel, sampledSynth, initOptions, 0L) != noErr ) { | |
| 433 SDL_SetError("Unable to create audio channel"); | |
| 434 free(channel); | |
| 435 channel = NULL; | |
| 436 return(-1); | |
| 437 } | |
| 438 | |
| 439 /* Start playback */ | |
| 440 if ( SndPlayDoubleBuffer(channel, (SndDoubleBufferHeaderPtr)&audio_dbh) | |
| 441 != noErr ) { | |
| 442 SDL_SetError("Unable to play double buffered audio"); | |
| 443 return(-1); | |
| 444 } | |
| 445 | |
| 446 return 1; | |
| 447 } | |
| 448 | |
| 449 #endif /* TARGET_API_MAC_CARBON */ | |
| 450 | |
| 451 |