2 * QEMU OS X CoreAudio audio driver
4 * Copyright (c) 2005 Mike Kronenberg
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
25 #include <CoreAudio/CoreAudio.h>
26 #include <string.h> /* strerror */
27 #include <pthread.h> /* pthread_X */
31 #define AUDIO_CAP "coreaudio"
32 #include "audio_int.h"
44 typedef struct coreaudioVoiceOut {
46 pthread_mutex_t mutex;
48 AudioDeviceID outputDeviceID;
49 UInt32 audioDevicePropertyBufferFrameSize;
50 AudioStreamBasicDescription outputStreamBasicDescription;
56 static void coreaudio_logstatus (OSStatus status)
61 case kAudioHardwareNoError:
62 str = "kAudioHardwareNoError";
65 case kAudioHardwareNotRunningError:
66 str = "kAudioHardwareNotRunningError";
69 case kAudioHardwareUnspecifiedError:
70 str = "kAudioHardwareUnspecifiedError";
73 case kAudioHardwareUnknownPropertyError:
74 str = "kAudioHardwareUnknownPropertyError";
77 case kAudioHardwareBadPropertySizeError:
78 str = "kAudioHardwareBadPropertySizeError";
81 case kAudioHardwareIllegalOperationError:
82 str = "kAudioHardwareIllegalOperationError";
85 case kAudioHardwareBadDeviceError:
86 str = "kAudioHardwareBadDeviceError";
89 case kAudioHardwareBadStreamError:
90 str = "kAudioHardwareBadStreamError";
93 case kAudioHardwareUnsupportedOperationError:
94 str = "kAudioHardwareUnsupportedOperationError";
97 case kAudioDeviceUnsupportedFormatError:
98 str = "kAudioDeviceUnsupportedFormatError";
101 case kAudioDevicePermissionsError:
102 str = "kAudioDevicePermissionsError";
106 AUD_log (AUDIO_CAP, "Reason: status code %ld\n", status);
110 AUD_log (AUDIO_CAP, "Reason: %s\n", str);
113 static void GCC_FMT_ATTR (2, 3) coreaudio_logerr (
122 AUD_log (AUDIO_CAP, fmt, ap);
125 coreaudio_logstatus (status);
128 static void GCC_FMT_ATTR (3, 4) coreaudio_logerr2 (
137 AUD_log (AUDIO_CAP, "Could not initialize %s\n", typ);
140 AUD_vlog (AUDIO_CAP, fmt, ap);
143 coreaudio_logstatus (status);
146 static inline UInt32 isPlaying (AudioDeviceID outputDeviceID)
150 UInt32 propertySize = sizeof(outputDeviceID);
151 status = AudioDeviceGetProperty(
152 outputDeviceID, 0, 0,
153 kAudioDevicePropertyDeviceIsRunning, &propertySize, &result);
154 if (status != kAudioHardwareNoError) {
155 coreaudio_logerr(status,
156 "Could not determine whether Device is playing\n");
161 static void coreaudio_atexit (void)
166 static int coreaudio_lock (coreaudioVoiceOut *core, const char *fn_name)
170 err = pthread_mutex_lock (&core->mutex);
172 dolog ("Could not lock voice for %s\nReason: %s\n",
173 fn_name, strerror (err));
179 static int coreaudio_unlock (coreaudioVoiceOut *core, const char *fn_name)
183 err = pthread_mutex_unlock (&core->mutex);
185 dolog ("Could not unlock voice for %s\nReason: %s\n",
186 fn_name, strerror (err));
192 static int coreaudio_run_out (HWVoiceOut *hw)
195 coreaudioVoiceOut *core = (coreaudioVoiceOut *) hw;
197 if (coreaudio_lock (core, "coreaudio_run_out")) {
201 live = audio_pcm_hw_get_live_out (hw);
203 if (core->decr > live) {
204 ldebug ("core->decr %d live %d core->live %d\n",
210 decr = audio_MIN (core->decr, live);
213 core->live = live - decr;
214 hw->rpos = core->rpos;
216 coreaudio_unlock (core, "coreaudio_run_out");
220 /* callback to feed audiooutput buffer */
221 static OSStatus audioDeviceIOProc(
222 AudioDeviceID inDevice,
223 const AudioTimeStamp* inNow,
224 const AudioBufferList* inInputData,
225 const AudioTimeStamp* inInputTime,
226 AudioBufferList* outOutputData,
227 const AudioTimeStamp* inOutputTime,
230 UInt32 frame, frameCount;
231 float *out = outOutputData->mBuffers[0].mData;
232 HWVoiceOut *hw = hwptr;
233 coreaudioVoiceOut *core = (coreaudioVoiceOut *) hwptr;
238 const float scale = 1.f / UINT_MAX;
240 const float scale = UINT_MAX;
244 if (coreaudio_lock (core, "audioDeviceIOProc")) {
249 frameCount = core->audioDevicePropertyBufferFrameSize;
252 /* if there are not enough samples, set signal and return */
253 if (live < frameCount) {
255 coreaudio_unlock (core, "audioDeviceIOProc(empty)");
260 src = hw->mix_buf + rpos;
263 for (frame = 0; frame < frameCount; frame++) {
265 *out++ = src[frame].l; /* left channel */
266 *out++ = src[frame].r; /* right channel */
269 *out++ = src[frame].l * scale; /* left channel */
270 *out++ = src[frame].r * scale; /* right channel */
272 *out++ = src[frame].l / scale; /* left channel */
273 *out++ = src[frame].r / scale; /* right channel */
279 mixeng_clear (src, frameCount);
280 rpos = (rpos + frameCount) % hw->samples;
281 core->decr += frameCount;
284 coreaudio_unlock (core, "audioDeviceIOProc");
288 static int coreaudio_write (SWVoiceOut *sw, void *buf, int len)
290 return audio_pcm_sw_write (sw, buf, len);
293 static int coreaudio_init_out (HWVoiceOut *hw, audsettings_t *as)
296 coreaudioVoiceOut *core = (coreaudioVoiceOut *) hw;
301 const char *typ = "playback";
302 AudioValueRange frameRange;
305 err = pthread_mutex_init(&core->mutex, NULL);
307 dolog("Could not create mutex\nReason: %s\n", strerror (err));
311 if (as->fmt == AUD_FMT_S16 || as->fmt == AUD_FMT_U16) {
316 audio_pcm_init_info (
319 /* Following is irrelevant actually since we do not use
320 mixengs clipping routines */
321 audio_need_to_swap_endian (endianess)
324 /* open default output device */
325 propertySize = sizeof(core->outputDeviceID);
326 status = AudioHardwareGetProperty(
327 kAudioHardwarePropertyDefaultOutputDevice,
329 &core->outputDeviceID);
330 if (status != kAudioHardwareNoError) {
331 coreaudio_logerr2 (status, typ,
332 "Could not get default output Device\n");
335 if (core->outputDeviceID == kAudioDeviceUnknown) {
336 dolog ("Could not initialize %s - Unknown Audiodevice\n", typ);
340 /* get minimum and maximum buffer frame sizes */
341 propertySize = sizeof(frameRange);
342 status = AudioDeviceGetProperty(
343 core->outputDeviceID,
346 kAudioDevicePropertyBufferFrameSizeRange,
349 if (status != kAudioHardwareNoError) {
350 coreaudio_logerr2 (status, typ,
351 "Could not get device buffer frame range\n");
355 if (frameRange.mMinimum > conf.buffer_frames) {
356 core->audioDevicePropertyBufferFrameSize = (UInt32) frameRange.mMinimum;
357 dolog ("warning: Upsizing Buffer Frames to %f\n", frameRange.mMinimum);
359 else if (frameRange.mMaximum < conf.buffer_frames) {
360 core->audioDevicePropertyBufferFrameSize = (UInt32) frameRange.mMaximum;
361 dolog ("warning: Downsizing Buffer Frames to %f\n", frameRange.mMaximum);
364 core->audioDevicePropertyBufferFrameSize = conf.buffer_frames;
367 /* set Buffer Frame Size */
368 propertySize = sizeof(core->audioDevicePropertyBufferFrameSize);
369 status = AudioDeviceSetProperty(
370 core->outputDeviceID,
374 kAudioDevicePropertyBufferFrameSize,
376 &core->audioDevicePropertyBufferFrameSize);
377 if (status != kAudioHardwareNoError) {
378 coreaudio_logerr2 (status, typ,
379 "Could not set device buffer frame size %ld\n",
380 core->audioDevicePropertyBufferFrameSize);
384 /* get Buffer Frame Size */
385 propertySize = sizeof(core->audioDevicePropertyBufferFrameSize);
386 status = AudioDeviceGetProperty(
387 core->outputDeviceID,
390 kAudioDevicePropertyBufferFrameSize,
392 &core->audioDevicePropertyBufferFrameSize);
393 if (status != kAudioHardwareNoError) {
394 coreaudio_logerr2 (status, typ,
395 "Could not get device buffer frame size\n");
398 hw->samples = conf.nbuffers * core->audioDevicePropertyBufferFrameSize;
400 /* get StreamFormat */
401 propertySize = sizeof(core->outputStreamBasicDescription);
402 status = AudioDeviceGetProperty(
403 core->outputDeviceID,
406 kAudioDevicePropertyStreamFormat,
408 &core->outputStreamBasicDescription);
409 if (status != kAudioHardwareNoError) {
410 coreaudio_logerr2 (status, typ,
411 "Could not get Device Stream properties\n");
412 core->outputDeviceID = kAudioDeviceUnknown;
417 core->outputStreamBasicDescription.mSampleRate = (Float64) as->freq;
418 propertySize = sizeof(core->outputStreamBasicDescription);
419 status = AudioDeviceSetProperty(
420 core->outputDeviceID,
424 kAudioDevicePropertyStreamFormat,
426 &core->outputStreamBasicDescription);
427 if (status != kAudioHardwareNoError) {
428 coreaudio_logerr2 (status, typ, "Could not set samplerate %d\n",
430 core->outputDeviceID = kAudioDeviceUnknown;
435 status = AudioDeviceAddIOProc(core->outputDeviceID, audioDeviceIOProc, hw);
436 if (status != kAudioHardwareNoError) {
437 coreaudio_logerr2 (status, typ, "Could not set IOProc\n");
438 core->outputDeviceID = kAudioDeviceUnknown;
443 if (!isPlaying(core->outputDeviceID)) {
444 status = AudioDeviceStart(core->outputDeviceID, audioDeviceIOProc);
445 if (status != kAudioHardwareNoError) {
446 coreaudio_logerr2 (status, typ, "Could not start playback\n");
447 AudioDeviceRemoveIOProc(core->outputDeviceID, audioDeviceIOProc);
448 core->outputDeviceID = kAudioDeviceUnknown;
456 static void coreaudio_fini_out (HWVoiceOut *hw)
460 coreaudioVoiceOut *core = (coreaudioVoiceOut *) hw;
462 if (!conf.isAtexit) {
464 if (isPlaying(core->outputDeviceID)) {
465 status = AudioDeviceStop(core->outputDeviceID, audioDeviceIOProc);
466 if (status != kAudioHardwareNoError) {
467 coreaudio_logerr (status, "Could not stop playback\n");
471 /* remove callback */
472 status = AudioDeviceRemoveIOProc(core->outputDeviceID,
474 if (status != kAudioHardwareNoError) {
475 coreaudio_logerr (status, "Could not remove IOProc\n");
478 core->outputDeviceID = kAudioDeviceUnknown;
481 err = pthread_mutex_destroy(&core->mutex);
483 dolog("Could not destroy mutex\nReason: %s\n", strerror (err));
487 static int coreaudio_ctl_out (HWVoiceOut *hw, int cmd, ...)
490 coreaudioVoiceOut *core = (coreaudioVoiceOut *) hw;
495 if (!isPlaying(core->outputDeviceID)) {
496 status = AudioDeviceStart(core->outputDeviceID, audioDeviceIOProc);
497 if (status != kAudioHardwareNoError) {
498 coreaudio_logerr (status, "Could not resume playback\n");
505 if (!conf.isAtexit) {
506 if (isPlaying(core->outputDeviceID)) {
507 status = AudioDeviceStop(core->outputDeviceID, audioDeviceIOProc);
508 if (status != kAudioHardwareNoError) {
509 coreaudio_logerr (status, "Could not pause playback\n");
518 static void *coreaudio_audio_init (void)
520 atexit(coreaudio_atexit);
521 return &coreaudio_audio_init;
524 static void coreaudio_audio_fini (void *opaque)
529 static struct audio_option coreaudio_options[] = {
530 {"BUFFER_SIZE", AUD_OPT_INT, &conf.buffer_frames,
531 "Size of the buffer in frames", NULL, 0},
532 {"BUFFER_COUNT", AUD_OPT_INT, &conf.nbuffers,
533 "Number of buffers", NULL, 0},
534 {NULL, 0, NULL, NULL, NULL, 0}
537 static struct audio_pcm_ops coreaudio_pcm_ops = {
551 struct audio_driver coreaudio_audio_driver = {
552 INIT_FIELD (name = ) "coreaudio",
553 INIT_FIELD (descr = )
554 "CoreAudio http://developer.apple.com/audio/coreaudio.html",
555 INIT_FIELD (options = ) coreaudio_options,
556 INIT_FIELD (init = ) coreaudio_audio_init,
557 INIT_FIELD (fini = ) coreaudio_audio_fini,
558 INIT_FIELD (pcm_ops = ) &coreaudio_pcm_ops,
559 INIT_FIELD (can_be_default = ) 1,
560 INIT_FIELD (max_voices_out = ) 1,
561 INIT_FIELD (max_voices_in = ) 0,
562 INIT_FIELD (voice_size_out = ) sizeof (coreaudioVoiceOut),
563 INIT_FIELD (voice_size_in = ) 0