[mirror_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 isAtexit;
} conf = {
    .buffer_frames = 512,
    .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
    }

    /* cleanup */
    mixeng_clear (src, frameCount);
    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;
    int bits = 8;
    int endianess = 0;
    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;
    }

    if (as->fmt == AUD_FMT_S16 || as->fmt == AUD_FMT_U16) {
        bits = 16;
        endianess = 1;
    }

    audio_pcm_init_info (
        &hw->info,
        as,
        /* Following is irrelevant actually since we do not use
           mixengs clipping routines */
        audio_need_to_swap_endian (endianess)
        );

    /* 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 = 4 * 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},
    {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;
5e941d4b	36	int isAtexit;
1d14ffa9	37	} conf = {
5e941d4b FB	38	.buffer_frames = 512,
5e941d4b FB	39	.isAtexit = 0
1d14ffa9 FB	40	};
	41
	42	typedef struct coreaudioVoiceOut {
	43	HWVoiceOut hw;
	44	pthread_mutex_t mutex;
5e941d4b	45	int isAtexit;
1d14ffa9	46	AudioDeviceID outputDeviceID;
5e941d4b	47	UInt32 audioDevicePropertyBufferFrameSize;
1d14ffa9	48	AudioStreamBasicDescription outputStreamBasicDescription;
1d14ffa9 FB	49	int live;
	50	int decr;
	51	int rpos;
	52	} coreaudioVoiceOut;
	53
	54	static void coreaudio_logstatus (OSStatus status)
	55	{
	56	char *str = "BUG";
	57
	58	switch(status) {
	59	case kAudioHardwareNoError:
	60	str = "kAudioHardwareNoError";
	61	break;
	62
	63	case kAudioHardwareNotRunningError:
	64	str = "kAudioHardwareNotRunningError";
	65	break;
	66
	67	case kAudioHardwareUnspecifiedError:
	68	str = "kAudioHardwareUnspecifiedError";
	69	break;
	70
	71	case kAudioHardwareUnknownPropertyError:
	72	str = "kAudioHardwareUnknownPropertyError";
	73	break;
	74
	75	case kAudioHardwareBadPropertySizeError:
	76	str = "kAudioHardwareBadPropertySizeError";
	77	break;
	78
	79	case kAudioHardwareIllegalOperationError:
	80	str = "kAudioHardwareIllegalOperationError";
	81	break;
	82
	83	case kAudioHardwareBadDeviceError:
	84	str = "kAudioHardwareBadDeviceError";
	85	break;
	86
	87	case kAudioHardwareBadStreamError:
	88	str = "kAudioHardwareBadStreamError";
	89	break;
	90
	91	case kAudioHardwareUnsupportedOperationError:
	92	str = "kAudioHardwareUnsupportedOperationError";
	93	break;
	94
	95	case kAudioDeviceUnsupportedFormatError:
	96	str = "kAudioDeviceUnsupportedFormatError";
	97	break;
	98
	99	case kAudioDevicePermissionsError:
	100	str = "kAudioDevicePermissionsError";
	101	break;
	102
	103	default:
	104	AUD_log (AUDIO_CAP, "Reason: status code %ld\n", status);
	105	return;
	106	}
	107
	108	AUD_log (AUDIO_CAP, "Reason: %s\n", str);
	109	}
	110
	111	static void GCC_FMT_ATTR (2, 3) coreaudio_logerr (
	112	OSStatus status,
113	const char *fmt,
114	...
115	)
116	{
117	va_list ap;
118
119	va_start (ap, fmt);
120	AUD_log (AUDIO_CAP, fmt, ap);
121	va_end (ap);
122
123	coreaudio_logstatus (status);
124	}
125
126	static void GCC_FMT_ATTR (3, 4) coreaudio_logerr2 (
127	OSStatus status,
128	const char *typ,
129	const char *fmt,
130	...
131	)
132	{
133	va_list ap;
134
c0fe3827	135	AUD_log (AUDIO_CAP, "Could not initialize %s\n", typ);
1d14ffa9 FB	136
	137	va_start (ap, fmt);
	138	AUD_vlog (AUDIO_CAP, fmt, ap);
	139	va_end (ap);
	140
	141	coreaudio_logstatus (status);
	142	}
	143
5e941d4b FB	144	static inline UInt32 isPlaying (AudioDeviceID outputDeviceID)
	145	{
	146	OSStatus status;
	147	UInt32 result = 0;
	148	UInt32 propertySize = sizeof(outputDeviceID);
	149	status = AudioDeviceGetProperty(
	150	outputDeviceID, 0, 0,
	151	kAudioDevicePropertyDeviceIsRunning, &propertySize, &result);
	152	if (status != kAudioHardwareNoError) {
	153	coreaudio_logerr(status,
	154	"Could not determine whether Device is playing\n");
	155	}
	156	return result;
	157	}
	158
	159	static void coreaudio_atexit (void)
	160	{
	161	conf.isAtexit = 1;
	162	}
	163
1d14ffa9 FB	164	static int coreaudio_lock (coreaudioVoiceOut core, const char fn_name)
	165	{
	166	int err;
	167
	168	err = pthread_mutex_lock (&core->mutex);
	169	if (err) {
c0fe3827	170	dolog ("Could not lock voice for %s\nReason: %s\n",
1d14ffa9 FB	171	fn_name, strerror (err));
	172	return -1;
	173	}
	174	return 0;
	175	}
	176
	177	static int coreaudio_unlock (coreaudioVoiceOut core, const char fn_name)
	178	{
	179	int err;
	180
	181	err = pthread_mutex_unlock (&core->mutex);
	182	if (err) {
c0fe3827	183	dolog ("Could not unlock voice for %s\nReason: %s\n",
1d14ffa9 FB	184	fn_name, strerror (err));
	185	return -1;
	186	}
	187	return 0;
	188	}
	189
	190	static int coreaudio_run_out (HWVoiceOut *hw)
	191	{
	192	int live, decr;
	193	coreaudioVoiceOut core = (coreaudioVoiceOut ) hw;
	194
	195	if (coreaudio_lock (core, "coreaudio_run_out")) {
	196	return 0;
	197	}
	198
	199	live = audio_pcm_hw_get_live_out (hw);
	200
	201	if (core->decr > live) {
	202	ldebug ("core->decr %d live %d core->live %d\n",
	203	core->decr,
	204	live,
	205	core->live);
	206	}
	207
	208	decr = audio_MIN (core->decr, live);
	209	core->decr -= decr;
	210
	211	core->live = live - decr;
	212	hw->rpos = core->rpos;
	213
	214	coreaudio_unlock (core, "coreaudio_run_out");
	215	return decr;
	216	}
	217
	218	/* callback to feed audiooutput buffer */
	219	static OSStatus audioDeviceIOProc(
	220	AudioDeviceID inDevice,
	221	const AudioTimeStamp* inNow,
	222	const AudioBufferList* inInputData,
	223	const AudioTimeStamp* inInputTime,
	224	AudioBufferList* outOutputData,
	225	const AudioTimeStamp* inOutputTime,
	226	void* hwptr)
	227	{
5e941d4b	228	UInt32 frame, frameCount;
1d14ffa9 FB	229	float *out = outOutputData->mBuffers[0].mData;
	230	HWVoiceOut *hw = hwptr;
	231	coreaudioVoiceOut core = (coreaudioVoiceOut ) hwptr;
	232	int rpos, live;
	233	st_sample_t *src;
	234	#ifndef FLOAT_MIXENG
	235	#ifdef RECIPROCAL
	236	const float scale = 1.f / UINT_MAX;
	237	#else
	238	const float scale = UINT_MAX;
	239	#endif
	240	#endif
	241
	242	if (coreaudio_lock (core, "audioDeviceIOProc")) {
	243	inInputTime = 0;
	244	return 0;
	245	}
	246
5e941d4b	247	frameCount = core->audioDevicePropertyBufferFrameSize;
1d14ffa9 FB	248	live = core->live;
	249
	250	/* if there are not enough samples, set signal and return */
	251	if (live < frameCount) {
	252	inInputTime = 0;
	253	coreaudio_unlock (core, "audioDeviceIOProc(empty)");
	254	return 0;
	255	}
	256
	257	rpos = core->rpos;
	258	src = hw->mix_buf + rpos;
	259
	260	/* fill buffer */
	261	for (frame = 0; frame < frameCount; frame++) {
	262	#ifdef FLOAT_MIXENG
	263	out++ = src[frame].l; / left channel */
	264	out++ = src[frame].r; / right channel */
	265	#else
	266	#ifdef RECIPROCAL
	267	out++ = src[frame].l scale; /* left channel */
	268	out++ = src[frame].r scale; /* right channel */
	269	#else
	270	out++ = src[frame].l / scale; / left channel */
	271	out++ = src[frame].r / scale; / right channel */
	272	#endif
	273	#endif
	274	}
	275
	276	/* cleanup */
	277	mixeng_clear (src, frameCount);
	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;
	297	int bits = 8;
	298	int endianess = 0;
5e941d4b FB	299	const char *typ = "playback";
5e941d4b FB	300	AudioValueRange frameRange;
1d14ffa9 FB	301
	302	/* create mutex */
	303	err = pthread_mutex_init(&core->mutex, NULL);
	304	if (err) {
c0fe3827	305	dolog("Could not create mutex\nReason: %s\n", strerror (err));
1d14ffa9 FB	306	return -1;
	307	}
	308
c0fe3827	309	if (as->fmt == AUD_FMT_S16 \|\| as->fmt == AUD_FMT_U16) {
1d14ffa9 FB	310	bits = 16;
	311	endianess = 1;
	312	}
	313
	314	audio_pcm_init_info (
	315	&hw->info,
c0fe3827	316	as,
1d14ffa9 FB	317	/* Following is irrelevant actually since we do not use
	318	mixengs clipping routines */
	319	audio_need_to_swap_endian (endianess)
	320	);
1d14ffa9 FB	321
	322	/* open default output device */
	323	propertySize = sizeof(core->outputDeviceID);
	324	status = AudioHardwareGetProperty(
	325	kAudioHardwarePropertyDefaultOutputDevice,
	326	&propertySize,
	327	&core->outputDeviceID);
	328	if (status != kAudioHardwareNoError) {
	329	coreaudio_logerr2 (status, typ,
c0fe3827	330	"Could not get default output Device\n");
1d14ffa9 FB	331	return -1;
	332	}
	333	if (core->outputDeviceID == kAudioDeviceUnknown) {
c0fe3827	334	dolog ("Could not initialize %s - Unknown Audiodevice\n", typ);
1d14ffa9 FB	335	return -1;
	336	}
	337
5e941d4b FB	338	/* get minimum and maximum buffer frame sizes */
	339	propertySize = sizeof(frameRange);
	340	status = AudioDeviceGetProperty(
	341	core->outputDeviceID,
	342	0,
	343	0,
	344	kAudioDevicePropertyBufferFrameSizeRange,
	345	&propertySize,
	346	&frameRange);
	347	if (status != kAudioHardwareNoError) {
	348	coreaudio_logerr2 (status, typ,
	349	"Could not get device buffer frame range\n");
	350	return -1;
	351	}
	352
	353	if (frameRange.mMinimum > conf.buffer_frames) {
	354	core->audioDevicePropertyBufferFrameSize = (UInt32) frameRange.mMinimum;
	355	dolog ("warning: Upsizing Buffer Frames to %f\n", frameRange.mMinimum);
	356	}
	357	else if (frameRange.mMaximum < conf.buffer_frames) {
	358	core->audioDevicePropertyBufferFrameSize = (UInt32) frameRange.mMaximum;
	359	dolog ("warning: Downsizing Buffer Frames to %f\n", frameRange.mMaximum);
	360	}
	361	else {
	362	core->audioDevicePropertyBufferFrameSize = conf.buffer_frames;
	363	}
	364
	365	/* set Buffer Frame Size */
	366	propertySize = sizeof(core->audioDevicePropertyBufferFrameSize);
1d14ffa9 FB	367	status = AudioDeviceSetProperty(
	368	core->outputDeviceID,
	369	NULL,
	370	0,
	371	false,
5e941d4b	372	kAudioDevicePropertyBufferFrameSize,
1d14ffa9	373	propertySize,
5e941d4b	374	&core->audioDevicePropertyBufferFrameSize);
1d14ffa9 FB	375	if (status != kAudioHardwareNoError) {
1d14ffa9 FB	376	coreaudio_logerr2 (status, typ,
5e941d4b FB	377	"Could not set device buffer frame size %ld\n",
5e941d4b FB	378	core->audioDevicePropertyBufferFrameSize);
1d14ffa9 FB	379	return -1;
	380	}
	381
5e941d4b FB	382	/* get Buffer Frame Size */
5e941d4b FB	383	propertySize = sizeof(core->audioDevicePropertyBufferFrameSize);
1d14ffa9 FB	384	status = AudioDeviceGetProperty(
	385	core->outputDeviceID,
	386	0,
	387	false,
5e941d4b	388	kAudioDevicePropertyBufferFrameSize,
1d14ffa9	389	&propertySize,
5e941d4b	390	&core->audioDevicePropertyBufferFrameSize);
1d14ffa9	391	if (status != kAudioHardwareNoError) {
5e941d4b FB	392	coreaudio_logerr2 (status, typ,
5e941d4b FB	393	"Could not get device buffer frame size\n");
1d14ffa9 FB	394	return -1;
1d14ffa9 FB	395	}
5e941d4b	396	hw->samples = 4 * core->audioDevicePropertyBufferFrameSize;
1d14ffa9 FB	397
	398	/* get StreamFormat */
	399	propertySize = sizeof(core->outputStreamBasicDescription);
	400	status = AudioDeviceGetProperty(
	401	core->outputDeviceID,
	402	0,
	403	false,
	404	kAudioDevicePropertyStreamFormat,
	405	&propertySize,
	406	&core->outputStreamBasicDescription);
	407	if (status != kAudioHardwareNoError) {
	408	coreaudio_logerr2 (status, typ,
c0fe3827	409	"Could not get Device Stream properties\n");
1d14ffa9 FB	410	core->outputDeviceID = kAudioDeviceUnknown;
	411	return -1;
	412	}
	413
	414	/* set Samplerate */
5e941d4b	415	core->outputStreamBasicDescription.mSampleRate = (Float64) as->freq;
1d14ffa9 FB	416	propertySize = sizeof(core->outputStreamBasicDescription);
	417	status = AudioDeviceSetProperty(
	418	core->outputDeviceID,
	419	0,
	420	0,
	421	0,
	422	kAudioDevicePropertyStreamFormat,
	423	propertySize,
	424	&core->outputStreamBasicDescription);
	425	if (status != kAudioHardwareNoError) {
575b5dc4 FB	426	coreaudio_logerr2 (status, typ, "Could not set samplerate %d\n",
575b5dc4 FB	427	as->freq);
1d14ffa9 FB	428	core->outputDeviceID = kAudioDeviceUnknown;
	429	return -1;
	430	}
	431
	432	/* set Callback */
	433	status = AudioDeviceAddIOProc(core->outputDeviceID, audioDeviceIOProc, hw);
	434	if (status != kAudioHardwareNoError) {
c0fe3827	435	coreaudio_logerr2 (status, typ, "Could not set IOProc\n");
1d14ffa9 FB	436	core->outputDeviceID = kAudioDeviceUnknown;
	437	return -1;
	438	}
	439
	440	/* start Playback */
5e941d4b	441	if (!isPlaying(core->outputDeviceID)) {
1d14ffa9 FB	442	status = AudioDeviceStart(core->outputDeviceID, audioDeviceIOProc);
1d14ffa9 FB	443	if (status != kAudioHardwareNoError) {
c0fe3827	444	coreaudio_logerr2 (status, typ, "Could not start playback\n");
1d14ffa9 FB	445	AudioDeviceRemoveIOProc(core->outputDeviceID, audioDeviceIOProc);
	446	core->outputDeviceID = kAudioDeviceUnknown;
	447	return -1;
	448	}
1d14ffa9 FB	449	}
	450
	451	return 0;
	452	}
	453
	454	static void coreaudio_fini_out (HWVoiceOut *hw)
	455	{
	456	OSStatus status;
	457	int err;
	458	coreaudioVoiceOut core = (coreaudioVoiceOut ) hw;
	459
5e941d4b FB	460	if (!conf.isAtexit) {
	461	/* stop playback */
	462	if (isPlaying(core->outputDeviceID)) {
	463	status = AudioDeviceStop(core->outputDeviceID, audioDeviceIOProc);
	464	if (status != kAudioHardwareNoError) {
	465	coreaudio_logerr (status, "Could not stop playback\n");
	466	}
1d14ffa9	467	}
1d14ffa9	468
5e941d4b FB	469	/* remove callback */
	470	status = AudioDeviceRemoveIOProc(core->outputDeviceID,
	471	audioDeviceIOProc);
	472	if (status != kAudioHardwareNoError) {
	473	coreaudio_logerr (status, "Could not remove IOProc\n");
	474	}
1d14ffa9 FB	475	}
	476	core->outputDeviceID = kAudioDeviceUnknown;
	477
	478	/* destroy mutex */
	479	err = pthread_mutex_destroy(&core->mutex);
	480	if (err) {
c0fe3827	481	dolog("Could not destroy mutex\nReason: %s\n", strerror (err));
1d14ffa9 FB	482	}
	483	}
	484
	485	static int coreaudio_ctl_out (HWVoiceOut *hw, int cmd, ...)
	486	{
	487	OSStatus status;
	488	coreaudioVoiceOut core = (coreaudioVoiceOut ) hw;
	489
	490	switch (cmd) {
	491	case VOICE_ENABLE:
	492	/* start playback */
5e941d4b	493	if (!isPlaying(core->outputDeviceID)) {
1d14ffa9 FB	494	status = AudioDeviceStart(core->outputDeviceID, audioDeviceIOProc);
1d14ffa9 FB	495	if (status != kAudioHardwareNoError) {
5e941d4b	496	coreaudio_logerr (status, "Could not resume playback\n");
1d14ffa9	497	}
1d14ffa9 FB	498	}
	499	break;
	500
	501	case VOICE_DISABLE:
	502	/* stop playback */
5e941d4b FB	503	if (!conf.isAtexit) {
	504	if (isPlaying(core->outputDeviceID)) {
	505	status = AudioDeviceStop(core->outputDeviceID, audioDeviceIOProc);
	506	if (status != kAudioHardwareNoError) {
	507	coreaudio_logerr (status, "Could not pause playback\n");
	508	}
1d14ffa9	509	}
1d14ffa9 FB	510	}
	511	break;
	512	}
	513	return 0;
	514	}
	515
	516	static void *coreaudio_audio_init (void)
	517	{
5e941d4b	518	atexit(coreaudio_atexit);
1d14ffa9 FB	519	return &coreaudio_audio_init;
	520	}
	521
	522	static void coreaudio_audio_fini (void *opaque)
	523	{
	524	(void) opaque;
	525	}
	526
	527	static struct audio_option coreaudio_options[] = {
	528	{"BUFFER_SIZE", AUD_OPT_INT, &conf.buffer_frames,
	529	"Size of the buffer in frames", NULL, 0},
	530	{NULL, 0, NULL, NULL, NULL, 0}
	531	};
	532
	533	static struct audio_pcm_ops coreaudio_pcm_ops = {
	534	coreaudio_init_out,
	535	coreaudio_fini_out,
	536	coreaudio_run_out,
	537	coreaudio_write,
	538	coreaudio_ctl_out,
	539
	540	NULL,
	541	NULL,
	542	NULL,
	543	NULL,
	544	NULL
	545	};
	546
	547	struct audio_driver coreaudio_audio_driver = {
	548	INIT_FIELD (name = ) "coreaudio",
	549	INIT_FIELD (descr = )
	550	"CoreAudio http://developer.apple.com/audio/coreaudio.html",
	551	INIT_FIELD (options = ) coreaudio_options,
	552	INIT_FIELD (init = ) coreaudio_audio_init,
	553	INIT_FIELD (fini = ) coreaudio_audio_fini,
	554	INIT_FIELD (pcm_ops = ) &coreaudio_pcm_ops,
	555	INIT_FIELD (can_be_default = ) 1,
	556	INIT_FIELD (max_voices_out = ) 1,
	557	INIT_FIELD (max_voices_in = ) 0,
	558	INIT_FIELD (voice_size_out = ) sizeof (coreaudioVoiceOut),
	559	INIT_FIELD (voice_size_in = ) 0
	560	};