e14743d1 |
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 | |