| 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 | #if defined(__APPLE__) && defined(__MACH__) |
| 25 | # include <Carbon/Carbon.h> |
| 26 | #elif TARGET_API_MAC_CARBON && (UNIVERSAL_INTERFACES_VERSION > 0x0335) |
| 27 | # include <Carbon.h> |
| 28 | #else |
| 29 | # include <Sound.h> /* SoundManager interface */ |
| 30 | # include <Gestalt.h> |
| 31 | # include <DriverServices.h> |
| 32 | #endif |
| 33 | |
| 34 | #if !defined(NewSndCallBackUPP) && (UNIVERSAL_INTERFACES_VERSION < 0x0335) |
| 35 | #if !defined(NewSndCallBackProc) /* avoid circular redefinition... */ |
| 36 | #define NewSndCallBackUPP NewSndCallBackProc |
| 37 | #endif |
| 38 | #if !defined(NewSndCallBackUPP) |
| 39 | #define NewSndCallBackUPP NewSndCallBackProc |
| 40 | #endif |
| 41 | #endif |
| 42 | |
| 43 | #include "SDL_audio.h" |
| 44 | #include "../SDL_audio_c.h" |
| 45 | #include "../SDL_sysaudio.h" |
| 46 | #include "SDL_romaudio.h" |
| 47 | |
| 48 | /* Audio driver functions */ |
| 49 | |
| 50 | static void Mac_CloseAudio(_THIS); |
| 51 | static int Mac_OpenAudio(_THIS, SDL_AudioSpec *spec); |
| 52 | static void Mac_LockAudio(_THIS); |
| 53 | static void Mac_UnlockAudio(_THIS); |
| 54 | |
| 55 | /* Audio driver bootstrap functions */ |
| 56 | |
| 57 | |
| 58 | static int Audio_Available(void) |
| 59 | { |
| 60 | return(1); |
| 61 | } |
| 62 | |
| 63 | static void Audio_DeleteDevice(SDL_AudioDevice *device) |
| 64 | { |
| 65 | SDL_free(device->hidden); |
| 66 | SDL_free(device); |
| 67 | } |
| 68 | |
| 69 | static SDL_AudioDevice *Audio_CreateDevice(int devindex) |
| 70 | { |
| 71 | SDL_AudioDevice *this; |
| 72 | |
| 73 | /* Initialize all variables that we clean on shutdown */ |
| 74 | this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice)); |
| 75 | if ( this ) { |
| 76 | SDL_memset(this, 0, (sizeof *this)); |
| 77 | this->hidden = (struct SDL_PrivateAudioData *) |
| 78 | SDL_malloc((sizeof *this->hidden)); |
| 79 | } |
| 80 | if ( (this == NULL) || (this->hidden == NULL) ) { |
| 81 | SDL_OutOfMemory(); |
| 82 | if ( this ) { |
| 83 | SDL_free(this); |
| 84 | } |
| 85 | return(0); |
| 86 | } |
| 87 | SDL_memset(this->hidden, 0, (sizeof *this->hidden)); |
| 88 | |
| 89 | /* Set the function pointers */ |
| 90 | this->OpenAudio = Mac_OpenAudio; |
| 91 | this->CloseAudio = Mac_CloseAudio; |
| 92 | this->LockAudio = Mac_LockAudio; |
| 93 | this->UnlockAudio = Mac_UnlockAudio; |
| 94 | this->free = Audio_DeleteDevice; |
| 95 | |
| 96 | #ifdef __MACOSX__ /* Mac OS X uses threaded audio, so normal thread code is okay */ |
| 97 | this->LockAudio = NULL; |
| 98 | this->UnlockAudio = NULL; |
| 99 | #endif |
| 100 | return this; |
| 101 | } |
| 102 | |
| 103 | AudioBootStrap SNDMGR_bootstrap = { |
| 104 | "sndmgr", "MacOS SoundManager 3.0", |
| 105 | Audio_Available, Audio_CreateDevice |
| 106 | }; |
| 107 | |
| 108 | #if defined(TARGET_API_MAC_CARBON) || defined(USE_RYANS_SOUNDCODE) |
| 109 | /* This works correctly on Mac OS X */ |
| 110 | |
| 111 | #pragma options align=power |
| 112 | |
| 113 | static volatile SInt32 audio_is_locked = 0; |
| 114 | static volatile SInt32 need_to_mix = 0; |
| 115 | |
| 116 | static UInt8 *buffer[2]; |
| 117 | static volatile UInt32 running = 0; |
| 118 | static CmpSoundHeader header; |
| 119 | static volatile Uint32 fill_me = 0; |
| 120 | |
| 121 | static void mix_buffer(SDL_AudioDevice *audio, UInt8 *buffer) |
| 122 | { |
| 123 | if ( ! audio->paused ) { |
| 124 | #ifdef __MACOSX__ |
| 125 | SDL_mutexP(audio->mixer_lock); |
| 126 | #endif |
| 127 | if ( audio->convert.needed ) { |
| 128 | audio->spec.callback(audio->spec.userdata, |
| 129 | (Uint8 *)audio->convert.buf,audio->convert.len); |
| 130 | SDL_ConvertAudio(&audio->convert); |
| 131 | if ( audio->convert.len_cvt != audio->spec.size ) { |
| 132 | /* Uh oh... probably crashes here */; |
| 133 | } |
| 134 | SDL_memcpy(buffer, audio->convert.buf, audio->convert.len_cvt); |
| 135 | } else { |
| 136 | audio->spec.callback(audio->spec.userdata, buffer, audio->spec.size); |
| 137 | } |
| 138 | #ifdef __MACOSX__ |
| 139 | SDL_mutexV(audio->mixer_lock); |
| 140 | #endif |
| 141 | } |
| 142 | |
| 143 | DecrementAtomic((SInt32 *) &need_to_mix); |
| 144 | } |
| 145 | |
| 146 | static void Mac_LockAudio(_THIS) |
| 147 | { |
| 148 | IncrementAtomic((SInt32 *) &audio_is_locked); |
| 149 | } |
| 150 | |
| 151 | static void Mac_UnlockAudio(_THIS) |
| 152 | { |
| 153 | SInt32 oldval; |
| 154 | |
| 155 | oldval = DecrementAtomic((SInt32 *) &audio_is_locked); |
| 156 | if ( oldval != 1 ) /* != 1 means audio is still locked. */ |
| 157 | return; |
| 158 | |
| 159 | /* Did we miss the chance to mix in an interrupt? Do it now. */ |
| 160 | if ( BitAndAtomic (0xFFFFFFFF, (UInt32 *) &need_to_mix) ) { |
| 161 | /* |
| 162 | * Note that this could be a problem if you missed an interrupt |
| 163 | * while the audio was locked, and get preempted by a second |
| 164 | * interrupt here, but that means you locked for way too long anyhow. |
| 165 | */ |
| 166 | mix_buffer (this, buffer[fill_me]); |
| 167 | } |
| 168 | } |
| 169 | |
| 170 | static void callBackProc (SndChannel *chan, SndCommand *cmd_passed ) { |
| 171 | UInt32 play_me; |
| 172 | SndCommand cmd; |
| 173 | SDL_AudioDevice *audio = (SDL_AudioDevice *)chan->userInfo; |
| 174 | |
| 175 | IncrementAtomic((SInt32 *) &need_to_mix); |
| 176 | |
| 177 | fill_me = cmd_passed->param2; /* buffer that has just finished playing, so fill it */ |
| 178 | play_me = ! fill_me; /* filled buffer to play _now_ */ |
| 179 | |
| 180 | if ( ! audio->enabled ) { |
| 181 | return; |
| 182 | } |
| 183 | |
| 184 | /* queue previously mixed buffer for playback. */ |
| 185 | header.samplePtr = (Ptr)buffer[play_me]; |
| 186 | cmd.cmd = bufferCmd; |
| 187 | cmd.param1 = 0; |
| 188 | cmd.param2 = (long)&header; |
| 189 | SndDoCommand (chan, &cmd, 0); |
| 190 | |
| 191 | memset (buffer[fill_me], 0, audio->spec.size); |
| 192 | |
| 193 | /* |
| 194 | * if audio device isn't locked, mix the next buffer to be queued in |
| 195 | * the memory block that just finished playing. |
| 196 | */ |
| 197 | if ( ! BitAndAtomic(0xFFFFFFFF, (UInt32 *) &audio_is_locked) ) { |
| 198 | mix_buffer (audio, buffer[fill_me]); |
| 199 | } |
| 200 | |
| 201 | /* set this callback to run again when current buffer drains. */ |
| 202 | if ( running ) { |
| 203 | cmd.cmd = callBackCmd; |
| 204 | cmd.param1 = 0; |
| 205 | cmd.param2 = play_me; |
| 206 | |
| 207 | SndDoCommand (chan, &cmd, 0); |
| 208 | } |
| 209 | } |
| 210 | |
| 211 | static int Mac_OpenAudio(_THIS, SDL_AudioSpec *spec) { |
| 212 | |
| 213 | SndCallBackUPP callback; |
| 214 | int sample_bits; |
| 215 | int i; |
| 216 | long initOptions; |
| 217 | |
| 218 | /* Very few conversions are required, but... */ |
| 219 | switch (spec->format) { |
| 220 | case AUDIO_S8: |
| 221 | spec->format = AUDIO_U8; |
| 222 | break; |
| 223 | case AUDIO_U16LSB: |
| 224 | spec->format = AUDIO_S16LSB; |
| 225 | break; |
| 226 | case AUDIO_U16MSB: |
| 227 | spec->format = AUDIO_S16MSB; |
| 228 | break; |
| 229 | } |
| 230 | SDL_CalculateAudioSpec(spec); |
| 231 | |
| 232 | /* initialize bufferCmd header */ |
| 233 | memset (&header, 0, sizeof(header)); |
| 234 | callback = (SndCallBackUPP) NewSndCallBackUPP (callBackProc); |
| 235 | sample_bits = spec->size / spec->samples / spec->channels * 8; |
| 236 | |
| 237 | #ifdef DEBUG_AUDIO |
| 238 | fprintf(stderr, |
| 239 | "Audio format 0x%x, channels = %d, sample_bits = %d, frequency = %d\n", |
| 240 | spec->format, spec->channels, sample_bits, spec->freq); |
| 241 | #endif /* DEBUG_AUDIO */ |
| 242 | |
| 243 | header.numChannels = spec->channels; |
| 244 | header.sampleSize = sample_bits; |
| 245 | header.sampleRate = spec->freq << 16; |
| 246 | header.numFrames = spec->samples; |
| 247 | header.encode = cmpSH; |
| 248 | |
| 249 | /* Note that we install the 16bitLittleEndian Converter if needed. */ |
| 250 | if ( spec->format == 0x8010 ) { |
| 251 | header.compressionID = fixedCompression; |
| 252 | header.format = k16BitLittleEndianFormat; |
| 253 | } |
| 254 | |
| 255 | /* allocate 2 buffers */ |
| 256 | for (i=0; i<2; i++) { |
| 257 | buffer[i] = (UInt8*)malloc (sizeof(UInt8) * spec->size); |
| 258 | if (buffer[i] == NULL) { |
| 259 | SDL_OutOfMemory(); |
| 260 | return (-1); |
| 261 | } |
| 262 | memset (buffer[i], 0, spec->size); |
| 263 | } |
| 264 | |
| 265 | /* Create the sound manager channel */ |
| 266 | channel = (SndChannelPtr)SDL_malloc(sizeof(*channel)); |
| 267 | if ( channel == NULL ) { |
| 268 | SDL_OutOfMemory(); |
| 269 | return(-1); |
| 270 | } |
| 271 | if ( spec->channels >= 2 ) { |
| 272 | initOptions = initStereo; |
| 273 | } else { |
| 274 | initOptions = initMono; |
| 275 | } |
| 276 | channel->userInfo = (long)this; |
| 277 | channel->qLength = 128; |
| 278 | if ( SndNewChannel(&channel, sampledSynth, initOptions, callback) != noErr ) { |
| 279 | SDL_SetError("Unable to create audio channel"); |
| 280 | SDL_free(channel); |
| 281 | channel = NULL; |
| 282 | return(-1); |
| 283 | } |
| 284 | |
| 285 | /* start playback */ |
| 286 | { |
| 287 | SndCommand cmd; |
| 288 | cmd.cmd = callBackCmd; |
| 289 | cmd.param2 = 0; |
| 290 | running = 1; |
| 291 | SndDoCommand (channel, &cmd, 0); |
| 292 | } |
| 293 | |
| 294 | return 1; |
| 295 | } |
| 296 | |
| 297 | static void Mac_CloseAudio(_THIS) { |
| 298 | |
| 299 | int i; |
| 300 | |
| 301 | running = 0; |
| 302 | |
| 303 | if (channel) { |
| 304 | SndDisposeChannel (channel, true); |
| 305 | channel = NULL; |
| 306 | } |
| 307 | |
| 308 | for ( i=0; i<2; ++i ) { |
| 309 | if ( buffer[i] ) { |
| 310 | SDL_free(buffer[i]); |
| 311 | buffer[i] = NULL; |
| 312 | } |
| 313 | } |
| 314 | } |
| 315 | |
| 316 | #else /* !TARGET_API_MAC_CARBON && !USE_RYANS_SOUNDCODE */ |
| 317 | |
| 318 | static void Mac_LockAudio(_THIS) |
| 319 | { |
| 320 | /* no-op. */ |
| 321 | } |
| 322 | |
| 323 | static void Mac_UnlockAudio(_THIS) |
| 324 | { |
| 325 | /* no-op. */ |
| 326 | } |
| 327 | |
| 328 | |
| 329 | /* This function is called by Sound Manager when it has exhausted one of |
| 330 | the buffers, so we'll zero it to silence and fill it with audio if |
| 331 | we're not paused. |
| 332 | */ |
| 333 | static pascal |
| 334 | void sndDoubleBackProc (SndChannelPtr chan, SndDoubleBufferPtr newbuf) |
| 335 | { |
| 336 | SDL_AudioDevice *audio = (SDL_AudioDevice *)newbuf->dbUserInfo[0]; |
| 337 | |
| 338 | /* If audio is quitting, don't do anything */ |
| 339 | if ( ! audio->enabled ) { |
| 340 | return; |
| 341 | } |
| 342 | memset (newbuf->dbSoundData, 0, audio->spec.size); |
| 343 | newbuf->dbNumFrames = audio->spec.samples; |
| 344 | if ( ! audio->paused ) { |
| 345 | if ( audio->convert.needed ) { |
| 346 | audio->spec.callback(audio->spec.userdata, |
| 347 | (Uint8 *)audio->convert.buf,audio->convert.len); |
| 348 | SDL_ConvertAudio(&audio->convert); |
| 349 | #if 0 |
| 350 | if ( audio->convert.len_cvt != audio->spec.size ) { |
| 351 | /* Uh oh... probably crashes here */; |
| 352 | } |
| 353 | #endif |
| 354 | SDL_memcpy(newbuf->dbSoundData, audio->convert.buf, |
| 355 | audio->convert.len_cvt); |
| 356 | } else { |
| 357 | audio->spec.callback(audio->spec.userdata, |
| 358 | (Uint8 *)newbuf->dbSoundData, audio->spec.size); |
| 359 | } |
| 360 | } |
| 361 | newbuf->dbFlags |= dbBufferReady; |
| 362 | } |
| 363 | |
| 364 | static int DoubleBufferAudio_Available(void) |
| 365 | { |
| 366 | int available; |
| 367 | NumVersion sndversion; |
| 368 | long response; |
| 369 | |
| 370 | available = 0; |
| 371 | sndversion = SndSoundManagerVersion(); |
| 372 | if ( sndversion.majorRev >= 3 ) { |
| 373 | if ( Gestalt(gestaltSoundAttr, &response) == noErr ) { |
| 374 | if ( (response & (1 << gestaltSndPlayDoubleBuffer)) ) { |
| 375 | available = 1; |
| 376 | } |
| 377 | } |
| 378 | } else { |
| 379 | if ( Gestalt(gestaltSoundAttr, &response) == noErr ) { |
| 380 | if ( (response & (1 << gestaltHasASC)) ) { |
| 381 | available = 1; |
| 382 | } |
| 383 | } |
| 384 | } |
| 385 | return(available); |
| 386 | } |
| 387 | |
| 388 | static void Mac_CloseAudio(_THIS) |
| 389 | { |
| 390 | int i; |
| 391 | |
| 392 | if ( channel != NULL ) { |
| 393 | /* Clean up the audio channel */ |
| 394 | SndDisposeChannel(channel, true); |
| 395 | channel = NULL; |
| 396 | } |
| 397 | for ( i=0; i<2; ++i ) { |
| 398 | if ( audio_buf[i] ) { |
| 399 | SDL_free(audio_buf[i]); |
| 400 | audio_buf[i] = NULL; |
| 401 | } |
| 402 | } |
| 403 | } |
| 404 | |
| 405 | static int Mac_OpenAudio(_THIS, SDL_AudioSpec *spec) |
| 406 | { |
| 407 | SndDoubleBufferHeader2 audio_dbh; |
| 408 | int i; |
| 409 | long initOptions; |
| 410 | int sample_bits; |
| 411 | SndDoubleBackUPP doubleBackProc; |
| 412 | |
| 413 | /* Check to make sure double-buffered audio is available */ |
| 414 | if ( ! DoubleBufferAudio_Available() ) { |
| 415 | SDL_SetError("Sound manager doesn't support double-buffering"); |
| 416 | return(-1); |
| 417 | } |
| 418 | |
| 419 | /* Very few conversions are required, but... */ |
| 420 | switch (spec->format) { |
| 421 | case AUDIO_S8: |
| 422 | spec->format = AUDIO_U8; |
| 423 | break; |
| 424 | case AUDIO_U16LSB: |
| 425 | spec->format = AUDIO_S16LSB; |
| 426 | break; |
| 427 | case AUDIO_U16MSB: |
| 428 | spec->format = AUDIO_S16MSB; |
| 429 | break; |
| 430 | } |
| 431 | SDL_CalculateAudioSpec(spec); |
| 432 | |
| 433 | /* initialize the double-back header */ |
| 434 | SDL_memset(&audio_dbh, 0, sizeof(audio_dbh)); |
| 435 | doubleBackProc = NewSndDoubleBackProc (sndDoubleBackProc); |
| 436 | sample_bits = spec->size / spec->samples / spec->channels * 8; |
| 437 | |
| 438 | audio_dbh.dbhNumChannels = spec->channels; |
| 439 | audio_dbh.dbhSampleSize = sample_bits; |
| 440 | audio_dbh.dbhCompressionID = 0; |
| 441 | audio_dbh.dbhPacketSize = 0; |
| 442 | audio_dbh.dbhSampleRate = spec->freq << 16; |
| 443 | audio_dbh.dbhDoubleBack = doubleBackProc; |
| 444 | audio_dbh.dbhFormat = 0; |
| 445 | |
| 446 | /* Note that we install the 16bitLittleEndian Converter if needed. */ |
| 447 | if ( spec->format == 0x8010 ) { |
| 448 | audio_dbh.dbhCompressionID = fixedCompression; |
| 449 | audio_dbh.dbhFormat = k16BitLittleEndianFormat; |
| 450 | } |
| 451 | |
| 452 | /* allocate the 2 double-back buffers */ |
| 453 | for ( i=0; i<2; ++i ) { |
| 454 | audio_buf[i] = SDL_calloc(1, sizeof(SndDoubleBuffer)+spec->size); |
| 455 | if ( audio_buf[i] == NULL ) { |
| 456 | SDL_OutOfMemory(); |
| 457 | return(-1); |
| 458 | } |
| 459 | audio_buf[i]->dbNumFrames = spec->samples; |
| 460 | audio_buf[i]->dbFlags = dbBufferReady; |
| 461 | audio_buf[i]->dbUserInfo[0] = (long)this; |
| 462 | audio_dbh.dbhBufferPtr[i] = audio_buf[i]; |
| 463 | } |
| 464 | |
| 465 | /* Create the sound manager channel */ |
| 466 | channel = (SndChannelPtr)SDL_malloc(sizeof(*channel)); |
| 467 | if ( channel == NULL ) { |
| 468 | SDL_OutOfMemory(); |
| 469 | return(-1); |
| 470 | } |
| 471 | if ( spec->channels >= 2 ) { |
| 472 | initOptions = initStereo; |
| 473 | } else { |
| 474 | initOptions = initMono; |
| 475 | } |
| 476 | channel->userInfo = 0; |
| 477 | channel->qLength = 128; |
| 478 | if ( SndNewChannel(&channel, sampledSynth, initOptions, 0L) != noErr ) { |
| 479 | SDL_SetError("Unable to create audio channel"); |
| 480 | SDL_free(channel); |
| 481 | channel = NULL; |
| 482 | return(-1); |
| 483 | } |
| 484 | |
| 485 | /* Start playback */ |
| 486 | if ( SndPlayDoubleBuffer(channel, (SndDoubleBufferHeaderPtr)&audio_dbh) |
| 487 | != noErr ) { |
| 488 | SDL_SetError("Unable to play double buffered audio"); |
| 489 | return(-1); |
| 490 | } |
| 491 | |
| 492 | return 1; |
| 493 | } |
| 494 | |
| 495 | #endif /* TARGET_API_MAC_CARBON || USE_RYANS_SOUNDCODE */ |
| 496 | |