[qemu.git] / audio / coreaudio.c

/*
 * QEMU OS X CoreAudio audio driver
 *
 * Copyright (c) 2005 Mike Kronenberg
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#include <CoreAudio/CoreAudio.h>
#include <string.h>             /* strerror */
#include <pthread.h>            /* pthread_X */

#include "vl.h"

#define AUDIO_CAP "coreaudio"
#include "audio_int.h"

struct {
    int buffer_frames;
    int nbuffers;
    int isAtexit;
} conf = {
    .buffer_frames = 512,
    .nbuffers = 4,
    .isAtexit = 0
};

typedef struct coreaudioVoiceOut {
    HWVoiceOut hw;
    pthread_mutex_t mutex;
    int isAtexit;
    AudioDeviceID outputDeviceID;
    UInt32 audioDevicePropertyBufferFrameSize;
    AudioStreamBasicDescription outputStreamBasicDescription;
    int live;
    int decr;
    int rpos;
} coreaudioVoiceOut;

static void coreaudio_logstatus (OSStatus status)
{
    char *str = "BUG";

    switch(status) {
    case kAudioHardwareNoError:
        str = "kAudioHardwareNoError";
        break;

    case kAudioHardwareNotRunningError:
        str = "kAudioHardwareNotRunningError";
        break;

    case kAudioHardwareUnspecifiedError:
        str = "kAudioHardwareUnspecifiedError";
        break;

    case kAudioHardwareUnknownPropertyError:
        str = "kAudioHardwareUnknownPropertyError";
        break;

    case kAudioHardwareBadPropertySizeError:
        str = "kAudioHardwareBadPropertySizeError";
        break;

    case kAudioHardwareIllegalOperationError:
        str = "kAudioHardwareIllegalOperationError";
        break;

    case kAudioHardwareBadDeviceError:
        str = "kAudioHardwareBadDeviceError";
        break;

    case kAudioHardwareBadStreamError:
        str = "kAudioHardwareBadStreamError";
        break;

    case kAudioHardwareUnsupportedOperationError:
        str = "kAudioHardwareUnsupportedOperationError";
        break;

    case kAudioDeviceUnsupportedFormatError:
        str = "kAudioDeviceUnsupportedFormatError";
        break;

    case kAudioDevicePermissionsError:
        str = "kAudioDevicePermissionsError";
        break;

    default:
        AUD_log (AUDIO_CAP, "Reason: status code %ld\n", status);
        return;
    }

    AUD_log (AUDIO_CAP, "Reason: %s\n", str);
}

static void GCC_FMT_ATTR (2, 3) coreaudio_logerr (
    OSStatus status,
    const char *fmt,
    ...
    )
{
    va_list ap;

    va_start (ap, fmt);
    AUD_log (AUDIO_CAP, fmt, ap);
    va_end (ap);

    coreaudio_logstatus (status);
}

static void GCC_FMT_ATTR (3, 4) coreaudio_logerr2 (
    OSStatus status,
    const char *typ,
    const char *fmt,
    ...
    )
{
    va_list ap;

    AUD_log (AUDIO_CAP, "Could not initialize %s\n", typ);

    va_start (ap, fmt);
    AUD_vlog (AUDIO_CAP, fmt, ap);
    va_end (ap);

    coreaudio_logstatus (status);
}

static inline UInt32 isPlaying (AudioDeviceID outputDeviceID)
{
    OSStatus status;
    UInt32 result = 0;
    UInt32 propertySize = sizeof(outputDeviceID);
    status = AudioDeviceGetProperty(
        outputDeviceID, 0, 0,
        kAudioDevicePropertyDeviceIsRunning, &propertySize, &result);
    if (status != kAudioHardwareNoError) {
        coreaudio_logerr(status,
                         "Could not determine whether Device is playing\n");
    }
    return result;
}

static void coreaudio_atexit (void)
{
    conf.isAtexit = 1;
}

static int coreaudio_lock (coreaudioVoiceOut *core, const char *fn_name)
{
    int err;

    err = pthread_mutex_lock (&core->mutex);
    if (err) {
        dolog ("Could not lock voice for %s\nReason: %s\n",
               fn_name, strerror (err));
        return -1;
    }
    return 0;
}

static int coreaudio_unlock (coreaudioVoiceOut *core, const char *fn_name)
{
    int err;

    err = pthread_mutex_unlock (&core->mutex);
    if (err) {
        dolog ("Could not unlock voice for %s\nReason: %s\n",
               fn_name, strerror (err));
        return -1;
    }
    return 0;
}

static int coreaudio_run_out (HWVoiceOut *hw)
{
    int live, decr;
    coreaudioVoiceOut *core = (coreaudioVoiceOut *) hw;

    if (coreaudio_lock (core, "coreaudio_run_out")) {
        return 0;
    }

    live = audio_pcm_hw_get_live_out (hw);

    if (core->decr > live) {
        ldebug ("core->decr %d live %d core->live %d\n",
                core->decr,
                live,
                core->live);
    }

    decr = audio_MIN (core->decr, live);
    core->decr -= decr;

    core->live = live - decr;
    hw->rpos = core->rpos;

    coreaudio_unlock (core, "coreaudio_run_out");
    return decr;
}

/* callback to feed audiooutput buffer */
static OSStatus audioDeviceIOProc(
    AudioDeviceID inDevice,
    const AudioTimeStamp* inNow,
    const AudioBufferList* inInputData,
    const AudioTimeStamp* inInputTime,
    AudioBufferList* outOutputData,
    const AudioTimeStamp* inOutputTime,
    void* hwptr)
{
    UInt32 frame, frameCount;
    float *out = outOutputData->mBuffers[0].mData;
    HWVoiceOut *hw = hwptr;
    coreaudioVoiceOut *core = (coreaudioVoiceOut *) hwptr;
    int rpos, live;
    st_sample_t *src;
#ifndef FLOAT_MIXENG
#ifdef RECIPROCAL
    const float scale = 1.f / UINT_MAX;
#else
    const float scale = UINT_MAX;
#endif
#endif

    if (coreaudio_lock (core, "audioDeviceIOProc")) {
        inInputTime = 0;
        return 0;
    }

    frameCount = core->audioDevicePropertyBufferFrameSize;
    live = core->live;

    /* if there are not enough samples, set signal and return */
    if (live < frameCount) {
        inInputTime = 0;
        coreaudio_unlock (core, "audioDeviceIOProc(empty)");
        return 0;
    }

    rpos = core->rpos;
    src = hw->mix_buf + rpos;

    /* fill buffer */
    for (frame = 0; frame < frameCount; frame++) {
#ifdef FLOAT_MIXENG
        *out++ = src[frame].l; /* left channel */
        *out++ = src[frame].r; /* right channel */
#else
#ifdef RECIPROCAL
        *out++ = src[frame].l * scale; /* left channel */
        *out++ = src[frame].r * scale; /* right channel */
#else
        *out++ = src[frame].l / scale; /* left channel */
        *out++ = src[frame].r / scale; /* right channel */
#endif
#endif
    }

    rpos = (rpos + frameCount) % hw->samples;
    core->decr += frameCount;
    core->rpos = rpos;

    coreaudio_unlock (core, "audioDeviceIOProc");
    return 0;
}

static int coreaudio_write (SWVoiceOut *sw, void *buf, int len)
{
    return audio_pcm_sw_write (sw, buf, len);
}

static int coreaudio_init_out (HWVoiceOut *hw, audsettings_t *as)
{
    OSStatus status;
    coreaudioVoiceOut *core = (coreaudioVoiceOut *) hw;
    UInt32 propertySize;
    int err;
    const char *typ = "playback";
    AudioValueRange frameRange;

    /* create mutex */
    err = pthread_mutex_init(&core->mutex, NULL);
    if (err) {
        dolog("Could not create mutex\nReason: %s\n", strerror (err));
        return -1;
    }

    audio_pcm_init_info (&hw->info, as);

    /* open default output device */
    propertySize = sizeof(core->outputDeviceID);
    status = AudioHardwareGetProperty(
        kAudioHardwarePropertyDefaultOutputDevice,
        &propertySize,
        &core->outputDeviceID);
    if (status != kAudioHardwareNoError) {
        coreaudio_logerr2 (status, typ,
                           "Could not get default output Device\n");
        return -1;
    }
    if (core->outputDeviceID == kAudioDeviceUnknown) {
        dolog ("Could not initialize %s - Unknown Audiodevice\n", typ);
        return -1;
    }

    /* get minimum and maximum buffer frame sizes */
    propertySize = sizeof(frameRange);
    status = AudioDeviceGetProperty(
        core->outputDeviceID,
        0,
        0,
        kAudioDevicePropertyBufferFrameSizeRange,
        &propertySize,
        &frameRange);
    if (status != kAudioHardwareNoError) {
        coreaudio_logerr2 (status, typ,
                           "Could not get device buffer frame range\n");
        return -1;
    }

    if (frameRange.mMinimum > conf.buffer_frames) {
        core->audioDevicePropertyBufferFrameSize = (UInt32) frameRange.mMinimum;
        dolog ("warning: Upsizing Buffer Frames to %f\n", frameRange.mMinimum);
    }
    else if (frameRange.mMaximum < conf.buffer_frames) {
        core->audioDevicePropertyBufferFrameSize = (UInt32) frameRange.mMaximum;
        dolog ("warning: Downsizing Buffer Frames to %f\n", frameRange.mMaximum);
    }
    else {
        core->audioDevicePropertyBufferFrameSize = conf.buffer_frames;
    }

    /* set Buffer Frame Size */
    propertySize = sizeof(core->audioDevicePropertyBufferFrameSize);
    status = AudioDeviceSetProperty(
        core->outputDeviceID,
        NULL,
        0,
        false,
        kAudioDevicePropertyBufferFrameSize,
        propertySize,
        &core->audioDevicePropertyBufferFrameSize);
    if (status != kAudioHardwareNoError) {
        coreaudio_logerr2 (status, typ,
                           "Could not set device buffer frame size %ld\n",
                           core->audioDevicePropertyBufferFrameSize);
        return -1;
    }

    /* get Buffer Frame Size */
    propertySize = sizeof(core->audioDevicePropertyBufferFrameSize);
    status = AudioDeviceGetProperty(
        core->outputDeviceID,
        0,
        false,
        kAudioDevicePropertyBufferFrameSize,
        &propertySize,
        &core->audioDevicePropertyBufferFrameSize);
    if (status != kAudioHardwareNoError) {
        coreaudio_logerr2 (status, typ,
                           "Could not get device buffer frame size\n");
        return -1;
    }
    hw->samples = conf.nbuffers * core->audioDevicePropertyBufferFrameSize;

    /* get StreamFormat */
    propertySize = sizeof(core->outputStreamBasicDescription);
    status = AudioDeviceGetProperty(
        core->outputDeviceID,
        0,
        false,
        kAudioDevicePropertyStreamFormat,
        &propertySize,
        &core->outputStreamBasicDescription);
    if (status != kAudioHardwareNoError) {
        coreaudio_logerr2 (status, typ,
                           "Could not get Device Stream properties\n");
        core->outputDeviceID = kAudioDeviceUnknown;
        return -1;
    }

    /* set Samplerate */
    core->outputStreamBasicDescription.mSampleRate = (Float64) as->freq;
    propertySize = sizeof(core->outputStreamBasicDescription);
    status = AudioDeviceSetProperty(
        core->outputDeviceID,
        0,
        0,
        0,
        kAudioDevicePropertyStreamFormat,
        propertySize,
        &core->outputStreamBasicDescription);
    if (status != kAudioHardwareNoError) {
        coreaudio_logerr2 (status, typ, "Could not set samplerate %d\n",
                           as->freq);
        core->outputDeviceID = kAudioDeviceUnknown;
        return -1;
    }

    /* set Callback */
    status = AudioDeviceAddIOProc(core->outputDeviceID, audioDeviceIOProc, hw);
    if (status != kAudioHardwareNoError) {
        coreaudio_logerr2 (status, typ, "Could not set IOProc\n");
        core->outputDeviceID = kAudioDeviceUnknown;
        return -1;
    }

    /* start Playback */
    if (!isPlaying(core->outputDeviceID)) {
        status = AudioDeviceStart(core->outputDeviceID, audioDeviceIOProc);
        if (status != kAudioHardwareNoError) {
            coreaudio_logerr2 (status, typ, "Could not start playback\n");
            AudioDeviceRemoveIOProc(core->outputDeviceID, audioDeviceIOProc);
            core->outputDeviceID = kAudioDeviceUnknown;
            return -1;
        }
    }

    return 0;
}

static void coreaudio_fini_out (HWVoiceOut *hw)
{
    OSStatus status;
    int err;
    coreaudioVoiceOut *core = (coreaudioVoiceOut *) hw;

    if (!conf.isAtexit) {
        /* stop playback */
        if (isPlaying(core->outputDeviceID)) {
            status = AudioDeviceStop(core->outputDeviceID, audioDeviceIOProc);
            if (status != kAudioHardwareNoError) {
                coreaudio_logerr (status, "Could not stop playback\n");
            }
        }

        /* remove callback */
        status = AudioDeviceRemoveIOProc(core->outputDeviceID,
                                         audioDeviceIOProc);
        if (status != kAudioHardwareNoError) {
            coreaudio_logerr (status, "Could not remove IOProc\n");
        }
    }
    core->outputDeviceID = kAudioDeviceUnknown;

    /* destroy mutex */
    err = pthread_mutex_destroy(&core->mutex);
    if (err) {
        dolog("Could not destroy mutex\nReason: %s\n", strerror (err));
    }
}

static int coreaudio_ctl_out (HWVoiceOut *hw, int cmd, ...)
{
    OSStatus status;
    coreaudioVoiceOut *core = (coreaudioVoiceOut *) hw;

    switch (cmd) {
    case VOICE_ENABLE:
        /* start playback */
        if (!isPlaying(core->outputDeviceID)) {
            status = AudioDeviceStart(core->outputDeviceID, audioDeviceIOProc);
            if (status != kAudioHardwareNoError) {
                coreaudio_logerr (status, "Could not resume playback\n");
            }
        }
        break;

    case VOICE_DISABLE:
        /* stop playback */
        if (!conf.isAtexit) {
            if (isPlaying(core->outputDeviceID)) {
                status = AudioDeviceStop(core->outputDeviceID, audioDeviceIOProc);
                if (status != kAudioHardwareNoError) {
                    coreaudio_logerr (status, "Could not pause playback\n");
                }
            }
        }
        break;
    }
    return 0;
}

static void *coreaudio_audio_init (void)
{
    atexit(coreaudio_atexit);
    return &coreaudio_audio_init;
}

static void coreaudio_audio_fini (void *opaque)
{
    (void) opaque;
}

static struct audio_option coreaudio_options[] = {
    {"BUFFER_SIZE", AUD_OPT_INT, &conf.buffer_frames,
     "Size of the buffer in frames", NULL, 0},
    {"BUFFER_COUNT", AUD_OPT_INT, &conf.nbuffers,
     "Number of buffers", NULL, 0},
    {NULL, 0, NULL, NULL, NULL, 0}
};

static struct audio_pcm_ops coreaudio_pcm_ops = {
    coreaudio_init_out,
    coreaudio_fini_out,
    coreaudio_run_out,
    coreaudio_write,
    coreaudio_ctl_out,

    NULL,
    NULL,
    NULL,
    NULL,
    NULL
};

struct audio_driver coreaudio_audio_driver = {
    INIT_FIELD (name           = ) "coreaudio",
    INIT_FIELD (descr          = )
    "CoreAudio http://developer.apple.com/audio/coreaudio.html",
    INIT_FIELD (options        = ) coreaudio_options,
    INIT_FIELD (init           = ) coreaudio_audio_init,
    INIT_FIELD (fini           = ) coreaudio_audio_fini,
    INIT_FIELD (pcm_ops        = ) &coreaudio_pcm_ops,
    INIT_FIELD (can_be_default = ) 1,
    INIT_FIELD (max_voices_out = ) 1,
    INIT_FIELD (max_voices_in  = ) 0,
    INIT_FIELD (voice_size_out = ) sizeof (coreaudioVoiceOut),
    INIT_FIELD (voice_size_in  = ) 0
};
Commit	Line	Data
1d14ffa9 FB	1	/*
	2	* QEMU OS X CoreAudio audio driver
	3	*
	4	* Copyright (c) 2005 Mike Kronenberg
	5	*
	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:
	12	*
	13	* The above copyright notice and this permission notice shall be included in
	14	* all copies or substantial portions of the Software.
	15	*
	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
	22	* THE SOFTWARE.
	23	*/
	24
	25	#include <CoreAudio/CoreAudio.h>
	26	#include <string.h> /* strerror */
	27	#include <pthread.h> /* pthread_X */
	28
	29	#include "vl.h"
	30
	31	#define AUDIO_CAP "coreaudio"
	32	#include "audio_int.h"
	33
1d14ffa9 FB	34	struct {
1d14ffa9 FB	35	int buffer_frames;
e59c1139	36	int nbuffers;
5e941d4b	37	int isAtexit;
1d14ffa9	38	} conf = {
5e941d4b	39	.buffer_frames = 512,
e59c1139	40	.nbuffers = 4,
5e941d4b	41	.isAtexit = 0
1d14ffa9 FB	42	};
	43
	44	typedef struct coreaudioVoiceOut {
	45	HWVoiceOut hw;
	46	pthread_mutex_t mutex;
5e941d4b	47	int isAtexit;
1d14ffa9	48	AudioDeviceID outputDeviceID;
5e941d4b	49	UInt32 audioDevicePropertyBufferFrameSize;
1d14ffa9	50	AudioStreamBasicDescription outputStreamBasicDescription;
1d14ffa9 FB	51	int live;
	52	int decr;
	53	int rpos;
	54	} coreaudioVoiceOut;
	55
	56	static void coreaudio_logstatus (OSStatus status)
	57	{
	58	char *str = "BUG";
	59
	60	switch(status) {
	61	case kAudioHardwareNoError:
	62	str = "kAudioHardwareNoError";
	63	break;
	64
	65	case kAudioHardwareNotRunningError:
	66	str = "kAudioHardwareNotRunningError";
	67	break;
	68
	69	case kAudioHardwareUnspecifiedError:
	70	str = "kAudioHardwareUnspecifiedError";
	71	break;
	72
	73	case kAudioHardwareUnknownPropertyError:
	74	str = "kAudioHardwareUnknownPropertyError";
	75	break;
	76
	77	case kAudioHardwareBadPropertySizeError:
	78	str = "kAudioHardwareBadPropertySizeError";
	79	break;
	80
	81	case kAudioHardwareIllegalOperationError:
	82	str = "kAudioHardwareIllegalOperationError";
	83	break;
	84
	85	case kAudioHardwareBadDeviceError:
	86	str = "kAudioHardwareBadDeviceError";
	87	break;
	88
	89	case kAudioHardwareBadStreamError:
	90	str = "kAudioHardwareBadStreamError";
	91	break;
	92
	93	case kAudioHardwareUnsupportedOperationError:
	94	str = "kAudioHardwareUnsupportedOperationError";
	95	break;
	96
	97	case kAudioDeviceUnsupportedFormatError:
	98	str = "kAudioDeviceUnsupportedFormatError";
	99	break;
	100
	101	case kAudioDevicePermissionsError:
	102	str = "kAudioDevicePermissionsError";
	103	break;
	104
	105	default:
	106	AUD_log (AUDIO_CAP, "Reason: status code %ld\n", status);
	107	return;
	108	}
	109
	110	AUD_log (AUDIO_CAP, "Reason: %s\n", str);
	111	}
	112
	113	static void GCC_FMT_ATTR (2, 3) coreaudio_logerr (
	114	OSStatus status,
115	const char *fmt,
116	...
117	)
118	{
119	va_list ap;
120
121	va_start (ap, fmt);
122	AUD_log (AUDIO_CAP, fmt, ap);
123	va_end (ap);
124
125	coreaudio_logstatus (status);
126	}
127
128	static void GCC_FMT_ATTR (3, 4) coreaudio_logerr2 (
129	OSStatus status,
130	const char *typ,
131	const char *fmt,
132	...
133	)
134	{
135	va_list ap;
136
c0fe3827	137	AUD_log (AUDIO_CAP, "Could not initialize %s\n", typ);
1d14ffa9 FB	138
	139	va_start (ap, fmt);
	140	AUD_vlog (AUDIO_CAP, fmt, ap);
	141	va_end (ap);
	142
	143	coreaudio_logstatus (status);
	144	}
	145
5e941d4b FB	146	static inline UInt32 isPlaying (AudioDeviceID outputDeviceID)
	147	{
	148	OSStatus status;
	149	UInt32 result = 0;
	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");
	157	}
	158	return result;
	159	}
	160
	161	static void coreaudio_atexit (void)
	162	{
	163	conf.isAtexit = 1;
	164	}
	165
1d14ffa9 FB	166	static int coreaudio_lock (coreaudioVoiceOut core, const char fn_name)
	167	{
	168	int err;
	169
	170	err = pthread_mutex_lock (&core->mutex);
	171	if (err) {
c0fe3827	172	dolog ("Could not lock voice for %s\nReason: %s\n",
1d14ffa9 FB	173	fn_name, strerror (err));
	174	return -1;
	175	}
	176	return 0;
	177	}
	178
	179	static int coreaudio_unlock (coreaudioVoiceOut core, const char fn_name)
	180	{
	181	int err;
	182
	183	err = pthread_mutex_unlock (&core->mutex);
	184	if (err) {
c0fe3827	185	dolog ("Could not unlock voice for %s\nReason: %s\n",
1d14ffa9 FB	186	fn_name, strerror (err));
	187	return -1;
	188	}
	189	return 0;
	190	}
	191
	192	static int coreaudio_run_out (HWVoiceOut *hw)
	193	{
	194	int live, decr;
	195	coreaudioVoiceOut core = (coreaudioVoiceOut ) hw;
	196
	197	if (coreaudio_lock (core, "coreaudio_run_out")) {
	198	return 0;
	199	}
	200
	201	live = audio_pcm_hw_get_live_out (hw);
	202
	203	if (core->decr > live) {
	204	ldebug ("core->decr %d live %d core->live %d\n",
	205	core->decr,
	206	live,
	207	core->live);
	208	}
	209
	210	decr = audio_MIN (core->decr, live);
	211	core->decr -= decr;
	212
	213	core->live = live - decr;
	214	hw->rpos = core->rpos;
	215
	216	coreaudio_unlock (core, "coreaudio_run_out");
	217	return decr;
	218	}
	219
	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,
	228	void* hwptr)
	229	{
5e941d4b	230	UInt32 frame, frameCount;
1d14ffa9 FB	231	float *out = outOutputData->mBuffers[0].mData;
	232	HWVoiceOut *hw = hwptr;
	233	coreaudioVoiceOut core = (coreaudioVoiceOut ) hwptr;
	234	int rpos, live;
	235	st_sample_t *src;
	236	#ifndef FLOAT_MIXENG
	237	#ifdef RECIPROCAL
	238	const float scale = 1.f / UINT_MAX;
	239	#else
	240	const float scale = UINT_MAX;
	241	#endif
	242	#endif
	243
	244	if (coreaudio_lock (core, "audioDeviceIOProc")) {
	245	inInputTime = 0;
	246	return 0;
	247	}
	248
5e941d4b	249	frameCount = core->audioDevicePropertyBufferFrameSize;
1d14ffa9 FB	250	live = core->live;
	251
	252	/* if there are not enough samples, set signal and return */
	253	if (live < frameCount) {
	254	inInputTime = 0;
	255	coreaudio_unlock (core, "audioDeviceIOProc(empty)");
	256	return 0;
	257	}
	258
	259	rpos = core->rpos;
	260	src = hw->mix_buf + rpos;
	261
	262	/* fill buffer */
	263	for (frame = 0; frame < frameCount; frame++) {
	264	#ifdef FLOAT_MIXENG
	265	out++ = src[frame].l; / left channel */
	266	out++ = src[frame].r; / right channel */
	267	#else
	268	#ifdef RECIPROCAL
	269	out++ = src[frame].l scale; /* left channel */
	270	out++ = src[frame].r scale; /* right channel */
	271	#else
	272	out++ = src[frame].l / scale; / left channel */
	273	out++ = src[frame].r / scale; / right channel */
	274	#endif
	275	#endif
	276	}
	277
1d14ffa9	278	rpos = (rpos + frameCount) % hw->samples;
5e941d4b	279	core->decr += frameCount;
1d14ffa9 FB	280	core->rpos = rpos;
	281
	282	coreaudio_unlock (core, "audioDeviceIOProc");
	283	return 0;
	284	}
	285
	286	static int coreaudio_write (SWVoiceOut sw, void buf, int len)
	287	{
	288	return audio_pcm_sw_write (sw, buf, len);
	289	}
	290
c0fe3827	291	static int coreaudio_init_out (HWVoiceOut hw, audsettings_t as)
1d14ffa9 FB	292	{
	293	OSStatus status;
	294	coreaudioVoiceOut core = (coreaudioVoiceOut ) hw;
	295	UInt32 propertySize;
	296	int err;
5e941d4b FB	297	const char *typ = "playback";
5e941d4b FB	298	AudioValueRange frameRange;
1d14ffa9 FB	299
	300	/* create mutex */
	301	err = pthread_mutex_init(&core->mutex, NULL);
	302	if (err) {
c0fe3827	303	dolog("Could not create mutex\nReason: %s\n", strerror (err));
1d14ffa9 FB	304	return -1;
	305	}
	306
d929eba5	307	audio_pcm_init_info (&hw->info, as);
1d14ffa9 FB	308
	309	/* open default output device */
	310	propertySize = sizeof(core->outputDeviceID);
	311	status = AudioHardwareGetProperty(
	312	kAudioHardwarePropertyDefaultOutputDevice,
	313	&propertySize,
	314	&core->outputDeviceID);
	315	if (status != kAudioHardwareNoError) {
	316	coreaudio_logerr2 (status, typ,
c0fe3827	317	"Could not get default output Device\n");
1d14ffa9 FB	318	return -1;
	319	}
	320	if (core->outputDeviceID == kAudioDeviceUnknown) {
c0fe3827	321	dolog ("Could not initialize %s - Unknown Audiodevice\n", typ);
1d14ffa9 FB	322	return -1;
	323	}
	324
5e941d4b FB	325	/* get minimum and maximum buffer frame sizes */
	326	propertySize = sizeof(frameRange);
	327	status = AudioDeviceGetProperty(
	328	core->outputDeviceID,
	329	0,
	330	0,
	331	kAudioDevicePropertyBufferFrameSizeRange,
	332	&propertySize,
	333	&frameRange);
	334	if (status != kAudioHardwareNoError) {
	335	coreaudio_logerr2 (status, typ,
	336	"Could not get device buffer frame range\n");
	337	return -1;
	338	}
	339
	340	if (frameRange.mMinimum > conf.buffer_frames) {
	341	core->audioDevicePropertyBufferFrameSize = (UInt32) frameRange.mMinimum;
	342	dolog ("warning: Upsizing Buffer Frames to %f\n", frameRange.mMinimum);
	343	}
	344	else if (frameRange.mMaximum < conf.buffer_frames) {
	345	core->audioDevicePropertyBufferFrameSize = (UInt32) frameRange.mMaximum;
	346	dolog ("warning: Downsizing Buffer Frames to %f\n", frameRange.mMaximum);
	347	}
	348	else {
	349	core->audioDevicePropertyBufferFrameSize = conf.buffer_frames;
	350	}
	351
	352	/* set Buffer Frame Size */
	353	propertySize = sizeof(core->audioDevicePropertyBufferFrameSize);
1d14ffa9 FB	354	status = AudioDeviceSetProperty(
	355	core->outputDeviceID,
	356	NULL,
	357	0,
	358	false,
5e941d4b	359	kAudioDevicePropertyBufferFrameSize,
1d14ffa9	360	propertySize,
5e941d4b	361	&core->audioDevicePropertyBufferFrameSize);
1d14ffa9 FB	362	if (status != kAudioHardwareNoError) {
1d14ffa9 FB	363	coreaudio_logerr2 (status, typ,
5e941d4b FB	364	"Could not set device buffer frame size %ld\n",
5e941d4b FB	365	core->audioDevicePropertyBufferFrameSize);
1d14ffa9 FB	366	return -1;
	367	}
	368
5e941d4b FB	369	/* get Buffer Frame Size */
5e941d4b FB	370	propertySize = sizeof(core->audioDevicePropertyBufferFrameSize);
1d14ffa9 FB	371	status = AudioDeviceGetProperty(
	372	core->outputDeviceID,
	373	0,
	374	false,
5e941d4b	375	kAudioDevicePropertyBufferFrameSize,
1d14ffa9	376	&propertySize,
5e941d4b	377	&core->audioDevicePropertyBufferFrameSize);
1d14ffa9	378	if (status != kAudioHardwareNoError) {
5e941d4b FB	379	coreaudio_logerr2 (status, typ,
5e941d4b FB	380	"Could not get device buffer frame size\n");
1d14ffa9 FB	381	return -1;
1d14ffa9 FB	382	}
e59c1139	383	hw->samples = conf.nbuffers * core->audioDevicePropertyBufferFrameSize;
1d14ffa9 FB	384
	385	/* get StreamFormat */
	386	propertySize = sizeof(core->outputStreamBasicDescription);
	387	status = AudioDeviceGetProperty(
	388	core->outputDeviceID,
	389	0,
	390	false,
	391	kAudioDevicePropertyStreamFormat,
	392	&propertySize,
	393	&core->outputStreamBasicDescription);
	394	if (status != kAudioHardwareNoError) {
	395	coreaudio_logerr2 (status, typ,
c0fe3827	396	"Could not get Device Stream properties\n");
1d14ffa9 FB	397	core->outputDeviceID = kAudioDeviceUnknown;
	398	return -1;
	399	}
	400
	401	/* set Samplerate */
5e941d4b	402	core->outputStreamBasicDescription.mSampleRate = (Float64) as->freq;
1d14ffa9 FB	403	propertySize = sizeof(core->outputStreamBasicDescription);
	404	status = AudioDeviceSetProperty(
	405	core->outputDeviceID,
	406	0,
	407	0,
	408	0,
	409	kAudioDevicePropertyStreamFormat,
	410	propertySize,
	411	&core->outputStreamBasicDescription);
	412	if (status != kAudioHardwareNoError) {
575b5dc4 FB	413	coreaudio_logerr2 (status, typ, "Could not set samplerate %d\n",
575b5dc4 FB	414	as->freq);
1d14ffa9 FB	415	core->outputDeviceID = kAudioDeviceUnknown;
	416	return -1;
	417	}
	418
	419	/* set Callback */
	420	status = AudioDeviceAddIOProc(core->outputDeviceID, audioDeviceIOProc, hw);
	421	if (status != kAudioHardwareNoError) {
c0fe3827	422	coreaudio_logerr2 (status, typ, "Could not set IOProc\n");
1d14ffa9 FB	423	core->outputDeviceID = kAudioDeviceUnknown;
	424	return -1;
	425	}
	426
	427	/* start Playback */
5e941d4b	428	if (!isPlaying(core->outputDeviceID)) {
1d14ffa9 FB	429	status = AudioDeviceStart(core->outputDeviceID, audioDeviceIOProc);
1d14ffa9 FB	430	if (status != kAudioHardwareNoError) {
c0fe3827	431	coreaudio_logerr2 (status, typ, "Could not start playback\n");
1d14ffa9 FB	432	AudioDeviceRemoveIOProc(core->outputDeviceID, audioDeviceIOProc);
	433	core->outputDeviceID = kAudioDeviceUnknown;
	434	return -1;
	435	}
1d14ffa9 FB	436	}
	437
	438	return 0;
	439	}
	440
	441	static void coreaudio_fini_out (HWVoiceOut *hw)
	442	{
	443	OSStatus status;
	444	int err;
	445	coreaudioVoiceOut core = (coreaudioVoiceOut ) hw;
	446
5e941d4b FB	447	if (!conf.isAtexit) {
	448	/* stop playback */
	449	if (isPlaying(core->outputDeviceID)) {
	450	status = AudioDeviceStop(core->outputDeviceID, audioDeviceIOProc);
	451	if (status != kAudioHardwareNoError) {
	452	coreaudio_logerr (status, "Could not stop playback\n");
	453	}
1d14ffa9	454	}
1d14ffa9	455
5e941d4b FB	456	/* remove callback */
	457	status = AudioDeviceRemoveIOProc(core->outputDeviceID,
	458	audioDeviceIOProc);
	459	if (status != kAudioHardwareNoError) {
	460	coreaudio_logerr (status, "Could not remove IOProc\n");
	461	}
1d14ffa9 FB	462	}
	463	core->outputDeviceID = kAudioDeviceUnknown;
	464
	465	/* destroy mutex */
	466	err = pthread_mutex_destroy(&core->mutex);
	467	if (err) {
c0fe3827	468	dolog("Could not destroy mutex\nReason: %s\n", strerror (err));
1d14ffa9 FB	469	}
	470	}
	471
	472	static int coreaudio_ctl_out (HWVoiceOut *hw, int cmd, ...)
	473	{
	474	OSStatus status;
	475	coreaudioVoiceOut core = (coreaudioVoiceOut ) hw;
	476
	477	switch (cmd) {
	478	case VOICE_ENABLE:
	479	/* start playback */
5e941d4b	480	if (!isPlaying(core->outputDeviceID)) {
1d14ffa9 FB	481	status = AudioDeviceStart(core->outputDeviceID, audioDeviceIOProc);
1d14ffa9 FB	482	if (status != kAudioHardwareNoError) {
5e941d4b	483	coreaudio_logerr (status, "Could not resume playback\n");
1d14ffa9	484	}
1d14ffa9 FB	485	}
	486	break;
	487
	488	case VOICE_DISABLE:
	489	/* stop playback */
5e941d4b FB	490	if (!conf.isAtexit) {
	491	if (isPlaying(core->outputDeviceID)) {
	492	status = AudioDeviceStop(core->outputDeviceID, audioDeviceIOProc);
	493	if (status != kAudioHardwareNoError) {
	494	coreaudio_logerr (status, "Could not pause playback\n");
	495	}
1d14ffa9	496	}
1d14ffa9 FB	497	}
	498	break;
	499	}
	500	return 0;
	501	}
	502
	503	static void *coreaudio_audio_init (void)
	504	{
5e941d4b	505	atexit(coreaudio_atexit);
1d14ffa9 FB	506	return &coreaudio_audio_init;
	507	}
	508
	509	static void coreaudio_audio_fini (void *opaque)
	510	{
	511	(void) opaque;
	512	}
	513
	514	static struct audio_option coreaudio_options[] = {
	515	{"BUFFER_SIZE", AUD_OPT_INT, &conf.buffer_frames,
	516	"Size of the buffer in frames", NULL, 0},
e59c1139 FB	517	{"BUFFER_COUNT", AUD_OPT_INT, &conf.nbuffers,
e59c1139 FB	518	"Number of buffers", NULL, 0},
1d14ffa9 FB	519	{NULL, 0, NULL, NULL, NULL, 0}
	520	};
	521
	522	static struct audio_pcm_ops coreaudio_pcm_ops = {
	523	coreaudio_init_out,
	524	coreaudio_fini_out,
	525	coreaudio_run_out,
	526	coreaudio_write,
	527	coreaudio_ctl_out,
	528
	529	NULL,
	530	NULL,
	531	NULL,
	532	NULL,
	533	NULL
	534	};
	535
	536	struct audio_driver coreaudio_audio_driver = {
	537	INIT_FIELD (name = ) "coreaudio",
	538	INIT_FIELD (descr = )
	539	"CoreAudio http://developer.apple.com/audio/coreaudio.html",
	540	INIT_FIELD (options = ) coreaudio_options,
	541	INIT_FIELD (init = ) coreaudio_audio_init,
	542	INIT_FIELD (fini = ) coreaudio_audio_fini,
	543	INIT_FIELD (pcm_ops = ) &coreaudio_pcm_ops,
	544	INIT_FIELD (can_be_default = ) 1,
	545	INIT_FIELD (max_voices_out = ) 1,
	546	INIT_FIELD (max_voices_in = ) 0,
	547	INIT_FIELD (voice_size_out = ) sizeof (coreaudioVoiceOut),
	548	INIT_FIELD (voice_size_in = ) 0
	549	};