[qemu.git] / audio / spiceaudio.c

/*
 * Copyright (C) 2010 Red Hat, Inc.
 *
 * maintained by Gerd Hoffmann <kraxel@redhat.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 or
 * (at your option) version 3 of the License.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

#include "hw/hw.h"
#include "qemu/timer.h"
#include "ui/qemu-spice.h"

#define AUDIO_CAP "spice"
#include "audio.h"
#include "audio_int.h"

#define LINE_IN_SAMPLES 1024
#define LINE_OUT_SAMPLES 1024

typedef struct SpiceRateCtl {
    int64_t               start_ticks;
    int64_t               bytes_sent;
} SpiceRateCtl;

typedef struct SpiceVoiceOut {
    HWVoiceOut            hw;
    SpicePlaybackInstance sin;
    SpiceRateCtl          rate;
    int                   active;
    uint32_t              *frame;
    uint32_t              *fpos;
    uint32_t              fsize;
} SpiceVoiceOut;

typedef struct SpiceVoiceIn {
    HWVoiceIn             hw;
    SpiceRecordInstance   sin;
    SpiceRateCtl          rate;
    int                   active;
    uint32_t              samples[LINE_IN_SAMPLES];
} SpiceVoiceIn;

static const SpicePlaybackInterface playback_sif = {
    .base.type          = SPICE_INTERFACE_PLAYBACK,
    .base.description   = "playback",
    .base.major_version = SPICE_INTERFACE_PLAYBACK_MAJOR,
    .base.minor_version = SPICE_INTERFACE_PLAYBACK_MINOR,
};

static const SpiceRecordInterface record_sif = {
    .base.type          = SPICE_INTERFACE_RECORD,
    .base.description   = "record",
    .base.major_version = SPICE_INTERFACE_RECORD_MAJOR,
    .base.minor_version = SPICE_INTERFACE_RECORD_MINOR,
};

static void *spice_audio_init (void)
{
    if (!using_spice) {
        return NULL;
    }
    return &spice_audio_init;
}

static void spice_audio_fini (void *opaque)
{
    /* nothing */
}

static void rate_start (SpiceRateCtl *rate)
{
    memset (rate, 0, sizeof (*rate));
    rate->start_ticks = qemu_get_clock_ns (vm_clock);
}

static int rate_get_samples (struct audio_pcm_info *info, SpiceRateCtl *rate)
{
    int64_t now;
    int64_t ticks;
    int64_t bytes;
    int64_t samples;

    now = qemu_get_clock_ns (vm_clock);
    ticks = now - rate->start_ticks;
    bytes = muldiv64 (ticks, info->bytes_per_second, get_ticks_per_sec ());
    samples = (bytes - rate->bytes_sent) >> info->shift;
    if (samples < 0 || samples > 65536) {
        fprintf (stderr, "Resetting rate control (%" PRId64 " samples)\n", samples);
        rate_start (rate);
        samples = 0;
    }
    rate->bytes_sent += samples << info->shift;
    return samples;
}

/* playback */

static int line_out_init (HWVoiceOut *hw, struct audsettings *as)
{
    SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);
    struct audsettings settings;

    settings.freq       = SPICE_INTERFACE_PLAYBACK_FREQ;
    settings.nchannels  = SPICE_INTERFACE_PLAYBACK_CHAN;
    settings.fmt        = AUD_FMT_S16;
    settings.endianness = AUDIO_HOST_ENDIANNESS;

    audio_pcm_init_info (&hw->info, &settings);
    hw->samples = LINE_OUT_SAMPLES;
    out->active = 0;

    out->sin.base.sif = &playback_sif.base;
    qemu_spice_add_interface (&out->sin.base);
    return 0;
}

static void line_out_fini (HWVoiceOut *hw)
{
    SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);

    spice_server_remove_interface (&out->sin.base);
}

static int line_out_run (HWVoiceOut *hw, int live)
{
    SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);
    int rpos, decr;
    int samples;

    if (!live) {
        return 0;
    }

    decr = rate_get_samples (&hw->info, &out->rate);
    decr = audio_MIN (live, decr);

    samples = decr;
    rpos = hw->rpos;
    while (samples) {
        int left_till_end_samples = hw->samples - rpos;
        int len = audio_MIN (samples, left_till_end_samples);

        if (!out->frame) {
            spice_server_playback_get_buffer (&out->sin, &out->frame, &out->fsize);
            out->fpos = out->frame;
        }
        if (out->frame) {
            len = audio_MIN (len, out->fsize);
            hw->clip (out->fpos, hw->mix_buf + rpos, len);
            out->fsize -= len;
            out->fpos  += len;
            if (out->fsize == 0) {
                spice_server_playback_put_samples (&out->sin, out->frame);
                out->frame = out->fpos = NULL;
            }
        }
        rpos = (rpos + len) % hw->samples;
        samples -= len;
    }
    hw->rpos = rpos;
    return decr;
}

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

static int line_out_ctl (HWVoiceOut *hw, int cmd, ...)
{
    SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);

    switch (cmd) {
    case VOICE_ENABLE:
        if (out->active) {
            break;
        }
        out->active = 1;
        rate_start (&out->rate);
        spice_server_playback_start (&out->sin);
        break;
    case VOICE_DISABLE:
        if (!out->active) {
            break;
        }
        out->active = 0;
        if (out->frame) {
            memset (out->fpos, 0, out->fsize << 2);
            spice_server_playback_put_samples (&out->sin, out->frame);
            out->frame = out->fpos = NULL;
        }
        spice_server_playback_stop (&out->sin);
        break;
    case VOICE_VOLUME:
        {
#if ((SPICE_INTERFACE_PLAYBACK_MAJOR >= 1) && (SPICE_INTERFACE_PLAYBACK_MINOR >= 2))
            SWVoiceOut *sw;
            va_list ap;
            uint16_t vol[2];

            va_start (ap, cmd);
            sw = va_arg (ap, SWVoiceOut *);
            va_end (ap);

            vol[0] = sw->vol.l / ((1ULL << 16) + 1);
            vol[1] = sw->vol.r / ((1ULL << 16) + 1);
            spice_server_playback_set_volume (&out->sin, 2, vol);
            spice_server_playback_set_mute (&out->sin, sw->vol.mute);
#endif
            break;
        }
    }

    return 0;
}

/* record */

static int line_in_init (HWVoiceIn *hw, struct audsettings *as)
{
    SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
    struct audsettings settings;

    settings.freq       = SPICE_INTERFACE_RECORD_FREQ;
    settings.nchannels  = SPICE_INTERFACE_RECORD_CHAN;
    settings.fmt        = AUD_FMT_S16;
    settings.endianness = AUDIO_HOST_ENDIANNESS;

    audio_pcm_init_info (&hw->info, &settings);
    hw->samples = LINE_IN_SAMPLES;
    in->active = 0;

    in->sin.base.sif = &record_sif.base;
    qemu_spice_add_interface (&in->sin.base);
    return 0;
}

static void line_in_fini (HWVoiceIn *hw)
{
    SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);

    spice_server_remove_interface (&in->sin.base);
}

static int line_in_run (HWVoiceIn *hw)
{
    SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
    int num_samples;
    int ready;
    int len[2];
    uint64_t delta_samp;
    const uint32_t *samples;

    if (!(num_samples = hw->samples - audio_pcm_hw_get_live_in (hw))) {
        return 0;
    }

    delta_samp = rate_get_samples (&hw->info, &in->rate);
    num_samples = audio_MIN (num_samples, delta_samp);

    ready = spice_server_record_get_samples (&in->sin, in->samples, num_samples);
    samples = in->samples;
    if (ready == 0) {
        static const uint32_t silence[LINE_IN_SAMPLES];
        samples = silence;
        ready = LINE_IN_SAMPLES;
    }

    num_samples = audio_MIN (ready, num_samples);

    if (hw->wpos + num_samples > hw->samples) {
        len[0] = hw->samples - hw->wpos;
        len[1] = num_samples - len[0];
    } else {
        len[0] = num_samples;
        len[1] = 0;
    }

    hw->conv (hw->conv_buf + hw->wpos, samples, len[0]);

    if (len[1]) {
        hw->conv (hw->conv_buf, samples + len[0], len[1]);
    }

    hw->wpos = (hw->wpos + num_samples) % hw->samples;

    return num_samples;
}

static int line_in_read (SWVoiceIn *sw, void *buf, int size)
{
    return audio_pcm_sw_read (sw, buf, size);
}

static int line_in_ctl (HWVoiceIn *hw, int cmd, ...)
{
    SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);

    switch (cmd) {
    case VOICE_ENABLE:
        if (in->active) {
            break;
        }
        in->active = 1;
        rate_start (&in->rate);
        spice_server_record_start (&in->sin);
        break;
    case VOICE_DISABLE:
        if (!in->active) {
            break;
        }
        in->active = 0;
        spice_server_record_stop (&in->sin);
        break;
    case VOICE_VOLUME:
        {
#if ((SPICE_INTERFACE_RECORD_MAJOR >= 2) && (SPICE_INTERFACE_RECORD_MINOR >= 2))
            SWVoiceIn *sw;
            va_list ap;
            uint16_t vol[2];

            va_start (ap, cmd);
            sw = va_arg (ap, SWVoiceIn *);
            va_end (ap);

            vol[0] = sw->vol.l / ((1ULL << 16) + 1);
            vol[1] = sw->vol.r / ((1ULL << 16) + 1);
            spice_server_record_set_volume (&in->sin, 2, vol);
            spice_server_record_set_mute (&in->sin, sw->vol.mute);
#endif
            break;
        }
    }

    return 0;
}

static struct audio_option audio_options[] = {
    { /* end of list */ },
};

static struct audio_pcm_ops audio_callbacks = {
    .init_out = line_out_init,
    .fini_out = line_out_fini,
    .run_out  = line_out_run,
    .write    = line_out_write,
    .ctl_out  = line_out_ctl,

    .init_in  = line_in_init,
    .fini_in  = line_in_fini,
    .run_in   = line_in_run,
    .read     = line_in_read,
    .ctl_in   = line_in_ctl,
};

struct audio_driver spice_audio_driver = {
    .name           = "spice",
    .descr          = "spice audio driver",
    .options        = audio_options,
    .init           = spice_audio_init,
    .fini           = spice_audio_fini,
    .pcm_ops        = &audio_callbacks,
    .max_voices_out = 1,
    .max_voices_in  = 1,
    .voice_size_out = sizeof (SpiceVoiceOut),
    .voice_size_in  = sizeof (SpiceVoiceIn),
#if ((SPICE_INTERFACE_PLAYBACK_MAJOR >= 1) && (SPICE_INTERFACE_PLAYBACK_MINOR >= 2))
    .ctl_caps       = VOICE_VOLUME_CAP
#endif
};

void qemu_spice_audio_init (void)
{
    spice_audio_driver.can_be_default = 1;
}
Commit	Line	Data
cf2c1839 GH	1	/*
	2	* Copyright (C) 2010 Red Hat, Inc.
	3	*
	4	* maintained by Gerd Hoffmann <kraxel@redhat.com>
	5	*
	6	* This program is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU General Public License as
	8	* published by the Free Software Foundation; either version 2 or
	9	* (at your option) version 3 of the License.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, see <http://www.gnu.org/licenses/>.
	18	*/
	19
3e313753	20	#include "hw/hw.h"
1de7afc9	21	#include "qemu/timer.h"
3e313753 GH	22	#include "ui/qemu-spice.h"
	23
	24	#define AUDIO_CAP "spice"
	25	#include "audio.h"
	26	#include "audio_int.h"
	27
	28	#define LINE_IN_SAMPLES 1024
	29	#define LINE_OUT_SAMPLES 1024
	30
	31	typedef struct SpiceRateCtl {
	32	int64_t start_ticks;
	33	int64_t bytes_sent;
	34	} SpiceRateCtl;
	35
	36	typedef struct SpiceVoiceOut {
	37	HWVoiceOut hw;
	38	SpicePlaybackInstance sin;
	39	SpiceRateCtl rate;
	40	int active;
	41	uint32_t *frame;
	42	uint32_t *fpos;
	43	uint32_t fsize;
	44	} SpiceVoiceOut;
	45
	46	typedef struct SpiceVoiceIn {
	47	HWVoiceIn hw;
	48	SpiceRecordInstance sin;
	49	SpiceRateCtl rate;
	50	int active;
	51	uint32_t samples[LINE_IN_SAMPLES];
	52	} SpiceVoiceIn;
	53
	54	static const SpicePlaybackInterface playback_sif = {
	55	.base.type = SPICE_INTERFACE_PLAYBACK,
	56	.base.description = "playback",
	57	.base.major_version = SPICE_INTERFACE_PLAYBACK_MAJOR,
	58	.base.minor_version = SPICE_INTERFACE_PLAYBACK_MINOR,
	59	};
	60
	61	static const SpiceRecordInterface record_sif = {
	62	.base.type = SPICE_INTERFACE_RECORD,
	63	.base.description = "record",
	64	.base.major_version = SPICE_INTERFACE_RECORD_MAJOR,
	65	.base.minor_version = SPICE_INTERFACE_RECORD_MINOR,
	66	};
	67
	68	static void *spice_audio_init (void)
	69	{
	70	if (!using_spice) {
	71	return NULL;
	72	}
	73	return &spice_audio_init;
	74	}
	75
	76	static void spice_audio_fini (void *opaque)
	77	{
	78	/* nothing */
	79	}
	80
	81	static void rate_start (SpiceRateCtl *rate)
	82	{
	83	memset (rate, 0, sizeof (*rate));
74475455	84	rate->start_ticks = qemu_get_clock_ns (vm_clock);
3e313753 GH	85	}
	86
	87	static int rate_get_samples (struct audio_pcm_info info, SpiceRateCtl rate)
	88	{
	89	int64_t now;
	90	int64_t ticks;
	91	int64_t bytes;
	92	int64_t samples;
	93
74475455	94	now = qemu_get_clock_ns (vm_clock);
3e313753 GH	95	ticks = now - rate->start_ticks;
	96	bytes = muldiv64 (ticks, info->bytes_per_second, get_ticks_per_sec ());
	97	samples = (bytes - rate->bytes_sent) >> info->shift;
	98	if (samples < 0 \|\| samples > 65536) {
	99	fprintf (stderr, "Resetting rate control (%" PRId64 " samples)\n", samples);
	100	rate_start (rate);
	101	samples = 0;
	102	}
	103	rate->bytes_sent += samples << info->shift;
	104	return samples;
	105	}
	106
	107	/* playback */
	108
	109	static int line_out_init (HWVoiceOut hw, struct audsettings as)
	110	{
	111	SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);
	112	struct audsettings settings;
	113
	114	settings.freq = SPICE_INTERFACE_PLAYBACK_FREQ;
	115	settings.nchannels = SPICE_INTERFACE_PLAYBACK_CHAN;
	116	settings.fmt = AUD_FMT_S16;
	117	settings.endianness = AUDIO_HOST_ENDIANNESS;
	118
	119	audio_pcm_init_info (&hw->info, &settings);
	120	hw->samples = LINE_OUT_SAMPLES;
	121	out->active = 0;
	122
	123	out->sin.base.sif = &playback_sif.base;
	124	qemu_spice_add_interface (&out->sin.base);
	125	return 0;
	126	}
	127
	128	static void line_out_fini (HWVoiceOut *hw)
	129	{
	130	SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);
	131
	132	spice_server_remove_interface (&out->sin.base);
	133	}
	134
	135	static int line_out_run (HWVoiceOut *hw, int live)
	136	{
	137	SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);
	138	int rpos, decr;
	139	int samples;
	140
	141	if (!live) {
	142	return 0;
	143	}
	144
	145	decr = rate_get_samples (&hw->info, &out->rate);
	146	decr = audio_MIN (live, decr);
	147
	148	samples = decr;
	149	rpos = hw->rpos;
	150	while (samples) {
	151	int left_till_end_samples = hw->samples - rpos;
	152	int len = audio_MIN (samples, left_till_end_samples);
	153
	154	if (!out->frame) {
	155	spice_server_playback_get_buffer (&out->sin, &out->frame, &out->fsize);
	156	out->fpos = out->frame;
	157	}
	158	if (out->frame) {
159	len = audio_MIN (len, out->fsize);
160	hw->clip (out->fpos, hw->mix_buf + rpos, len);
161	out->fsize -= len;
162	out->fpos += len;
163	if (out->fsize == 0) {
164	spice_server_playback_put_samples (&out->sin, out->frame);
165	out->frame = out->fpos = NULL;
166	}
167	}
168	rpos = (rpos + len) % hw->samples;
169	samples -= len;
170	}
171	hw->rpos = rpos;
172	return decr;
173	}
174
175	static int line_out_write (SWVoiceOut sw, void buf, int len)
176	{
177	return audio_pcm_sw_write (sw, buf, len);
178	}
179
180	static int line_out_ctl (HWVoiceOut *hw, int cmd, ...)
181	{
182	SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);
183
184	switch (cmd) {
185	case VOICE_ENABLE:
186	if (out->active) {
187	break;
188	}
189	out->active = 1;
190	rate_start (&out->rate);
191	spice_server_playback_start (&out->sin);
192	break;
193	case VOICE_DISABLE:
194	if (!out->active) {
195	break;
196	}
197	out->active = 0;
198	if (out->frame) {
199	memset (out->fpos, 0, out->fsize << 2);
200	spice_server_playback_put_samples (&out->sin, out->frame);
201	out->frame = out->fpos = NULL;
202	}
203	spice_server_playback_stop (&out->sin);
204	break;
a70c99c6 MAL	205	case VOICE_VOLUME:
	206	{
	207	#if ((SPICE_INTERFACE_PLAYBACK_MAJOR >= 1) && (SPICE_INTERFACE_PLAYBACK_MINOR >= 2))
	208	SWVoiceOut *sw;
	209	va_list ap;
	210	uint16_t vol[2];
	211
	212	va_start (ap, cmd);
	213	sw = va_arg (ap, SWVoiceOut *);
	214	va_end (ap);
	215
	216	vol[0] = sw->vol.l / ((1ULL << 16) + 1);
	217	vol[1] = sw->vol.r / ((1ULL << 16) + 1);
	218	spice_server_playback_set_volume (&out->sin, 2, vol);
	219	spice_server_playback_set_mute (&out->sin, sw->vol.mute);
	220	#endif
	221	break;
	222	}
3e313753	223	}
a70c99c6	224
3e313753 GH	225	return 0;
	226	}
	227
	228	/* record */
	229
	230	static int line_in_init (HWVoiceIn hw, struct audsettings as)
	231	{
	232	SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
	233	struct audsettings settings;
	234
	235	settings.freq = SPICE_INTERFACE_RECORD_FREQ;
	236	settings.nchannels = SPICE_INTERFACE_RECORD_CHAN;
	237	settings.fmt = AUD_FMT_S16;
	238	settings.endianness = AUDIO_HOST_ENDIANNESS;
	239
	240	audio_pcm_init_info (&hw->info, &settings);
	241	hw->samples = LINE_IN_SAMPLES;
	242	in->active = 0;
	243
	244	in->sin.base.sif = &record_sif.base;
	245	qemu_spice_add_interface (&in->sin.base);
	246	return 0;
	247	}
	248
	249	static void line_in_fini (HWVoiceIn *hw)
	250	{
	251	SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
	252
	253	spice_server_remove_interface (&in->sin.base);
	254	}
	255
	256	static int line_in_run (HWVoiceIn *hw)
	257	{
	258	SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
	259	int num_samples;
	260	int ready;
	261	int len[2];
	262	uint64_t delta_samp;
	263	const uint32_t *samples;
	264
	265	if (!(num_samples = hw->samples - audio_pcm_hw_get_live_in (hw))) {
	266	return 0;
	267	}
	268
	269	delta_samp = rate_get_samples (&hw->info, &in->rate);
	270	num_samples = audio_MIN (num_samples, delta_samp);
	271
	272	ready = spice_server_record_get_samples (&in->sin, in->samples, num_samples);
	273	samples = in->samples;
	274	if (ready == 0) {
	275	static const uint32_t silence[LINE_IN_SAMPLES];
	276	samples = silence;
	277	ready = LINE_IN_SAMPLES;
	278	}
	279
	280	num_samples = audio_MIN (ready, num_samples);
	281
	282	if (hw->wpos + num_samples > hw->samples) {
	283	len[0] = hw->samples - hw->wpos;
	284	len[1] = num_samples - len[0];
	285	} else {
	286	len[0] = num_samples;
	287	len[1] = 0;
	288	}
289
00e07679	290	hw->conv (hw->conv_buf + hw->wpos, samples, len[0]);
3e313753 GH	291
3e313753 GH	292	if (len[1]) {
00e07679	293	hw->conv (hw->conv_buf, samples + len[0], len[1]);
3e313753 GH	294	}
	295
	296	hw->wpos = (hw->wpos + num_samples) % hw->samples;
	297
	298	return num_samples;
	299	}
	300
	301	static int line_in_read (SWVoiceIn sw, void buf, int size)
	302	{
	303	return audio_pcm_sw_read (sw, buf, size);
	304	}
	305
	306	static int line_in_ctl (HWVoiceIn *hw, int cmd, ...)
	307	{
	308	SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
	309
	310	switch (cmd) {
	311	case VOICE_ENABLE:
	312	if (in->active) {
	313	break;
	314	}
	315	in->active = 1;
	316	rate_start (&in->rate);
	317	spice_server_record_start (&in->sin);
	318	break;
	319	case VOICE_DISABLE:
	320	if (!in->active) {
	321	break;
	322	}
	323	in->active = 0;
	324	spice_server_record_stop (&in->sin);
	325	break;
a70c99c6 MAL	326	case VOICE_VOLUME:
	327	{
	328	#if ((SPICE_INTERFACE_RECORD_MAJOR >= 2) && (SPICE_INTERFACE_RECORD_MINOR >= 2))
	329	SWVoiceIn *sw;
	330	va_list ap;
	331	uint16_t vol[2];
	332
	333	va_start (ap, cmd);
	334	sw = va_arg (ap, SWVoiceIn *);
	335	va_end (ap);
	336
	337	vol[0] = sw->vol.l / ((1ULL << 16) + 1);
	338	vol[1] = sw->vol.r / ((1ULL << 16) + 1);
	339	spice_server_record_set_volume (&in->sin, 2, vol);
	340	spice_server_record_set_mute (&in->sin, sw->vol.mute);
	341	#endif
	342	break;
	343	}
3e313753	344	}
a70c99c6	345
3e313753 GH	346	return 0;
	347	}
	348
	349	static struct audio_option audio_options[] = {
	350	{ /* end of list */ },
	351	};
	352
	353	static struct audio_pcm_ops audio_callbacks = {
	354	.init_out = line_out_init,
	355	.fini_out = line_out_fini,
	356	.run_out = line_out_run,
	357	.write = line_out_write,
	358	.ctl_out = line_out_ctl,
	359
	360	.init_in = line_in_init,
	361	.fini_in = line_in_fini,
	362	.run_in = line_in_run,
	363	.read = line_in_read,
	364	.ctl_in = line_in_ctl,
	365	};
	366
	367	struct audio_driver spice_audio_driver = {
	368	.name = "spice",
	369	.descr = "spice audio driver",
	370	.options = audio_options,
	371	.init = spice_audio_init,
	372	.fini = spice_audio_fini,
	373	.pcm_ops = &audio_callbacks,
	374	.max_voices_out = 1,
	375	.max_voices_in = 1,
	376	.voice_size_out = sizeof (SpiceVoiceOut),
	377	.voice_size_in = sizeof (SpiceVoiceIn),
a70c99c6 MAL	378	#if ((SPICE_INTERFACE_PLAYBACK_MAJOR >= 1) && (SPICE_INTERFACE_PLAYBACK_MINOR >= 2))
	379	.ctl_caps = VOICE_VOLUME_CAP
	380	#endif
3e313753 GH	381	};
	382
	383	void qemu_spice_audio_init (void)
	384	{
	385	spice_audio_driver.can_be_default = 1;
	386	}