Commit 3e313753 authored by Gerd Hoffmann's avatar Gerd Hoffmann Committed by malc

spice: add audio

Add support for the spice audio interface.  With this patch applied
audio can be forwarded over the network from/to the spice client.  Both
recording and playback is supported.

The driver is first in the driver list, but the can_be_default flag is
set only in case spice is active.  So if you have the spice protocol
enabled the spice audio driver is the default one, otherwise whatever
comes first after spice in the list.  Overriding the default using
QEMU_AUDIO_DRV works in any case.

[ v2: audio codestyle: add spaces before open parenthesis ]
[ v2: add const to silence array ]
Signed-off-by: default avatarGerd Hoffmann <kraxel@redhat.com>
Cc: malc <av1474@comtv.ru>
Signed-off-by: default avatarmalc <av1474@comtv.ru>
parent df0db221
......@@ -102,6 +102,7 @@ common-obj-$(CONFIG_SPICE) += ui/spice-core.o ui/spice-input.o ui/spice-display.
audio-obj-y = audio.o noaudio.o wavaudio.o mixeng.o
audio-obj-$(CONFIG_SDL) += sdlaudio.o
audio-obj-$(CONFIG_OSS) += ossaudio.o
audio-obj-$(CONFIG_SPICE) += spiceaudio.o
audio-obj-$(CONFIG_COREAUDIO) += coreaudio.o
audio-obj-$(CONFIG_ALSA) += alsaaudio.o
audio-obj-$(CONFIG_DSOUND) += dsoundaudio.o
......
......@@ -44,6 +44,9 @@
that we generate the list.
*/
static struct audio_driver *drvtab[] = {
#ifdef CONFIG_SPICE
&spice_audio_driver,
#endif
CONFIG_AUDIO_DRIVERS
&no_audio_driver,
&wav_audio_driver
......
......@@ -209,6 +209,7 @@ extern struct audio_driver coreaudio_audio_driver;
extern struct audio_driver dsound_audio_driver;
extern struct audio_driver esd_audio_driver;
extern struct audio_driver pa_audio_driver;
extern struct audio_driver spice_audio_driver;
extern struct audio_driver winwave_audio_driver;
extern struct mixeng_volume nominal_volume;
......
#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 (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 (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;
}
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], &nominal_volume);
if (len[1]) {
hw->conv (hw->conv_buf, samples + len[0], len[1],
&nominal_volume);
}
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;
}
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),
};
void qemu_spice_audio_init (void)
{
spice_audio_driver.can_be_default = 1;
}
......@@ -29,6 +29,7 @@ extern int using_spice;
void qemu_spice_init(void);
void qemu_spice_input_init(void);
void qemu_spice_audio_init(void);
void qemu_spice_display_init(DisplayState *ds);
int qemu_spice_add_interface(SpiceBaseInstance *sin);
......
......@@ -361,6 +361,7 @@ void qemu_spice_init(void)
using_spice = 1;
qemu_spice_input_init();
qemu_spice_audio_init();
qemu_free(x509_key_file);
qemu_free(x509_cert_file);
......
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