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qemu/audio/paaudio.c
Paolo Bonzini 69a802792a audio: remove QEMU_AUDIO_* and -audio-help support 
These have been deprecated for a long time, and the introduction of
-audio in 7.1.0 has cemented the new way of specifying an audio backend's
parameters.  However, there is still a need for simple configuration
of the audio backend in the desktop case; therefore, if no audiodev is
passed to audio_init(), go through a bunch of simple Audiodev* structures
and pick the first that can be initialized successfully.

The only QEMU_AUDIO_* option that is left in, waiting for a better idea,
is QEMU_AUDIO_DRV=none which is used by qtest.

Remove all the parsing code, including the concept of "can_be_default"
audio drivers: now that audio_prio_list[] is only used in a single place,
wav can be excluded directly in that function.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2023-10-03 10:29:39 +02:00

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/* public domain */
#include "qemu/osdep.h"
#include "qemu/module.h"
#include "audio.h"
#include "qapi/error.h"
#include <pulse/pulseaudio.h>
#define AUDIO_CAP "pulseaudio"
#include "audio_int.h"
typedef struct PAConnection {
char *server;
int refcount;
QTAILQ_ENTRY(PAConnection) list;
pa_threaded_mainloop *mainloop;
pa_context *context;
} PAConnection;
static QTAILQ_HEAD(PAConnectionHead, PAConnection) pa_conns =
QTAILQ_HEAD_INITIALIZER(pa_conns);
typedef struct {
Audiodev *dev;
PAConnection *conn;
} paaudio;
typedef struct {
HWVoiceOut hw;
pa_stream *stream;
paaudio *g;
} PAVoiceOut;
typedef struct {
HWVoiceIn hw;
pa_stream *stream;
const void *read_data;
size_t read_length;
paaudio *g;
} PAVoiceIn;
static void qpa_conn_fini(PAConnection *c);
static void G_GNUC_PRINTF (2, 3) qpa_logerr (int err, const char *fmt, ...)
{
va_list ap;
va_start (ap, fmt);
AUD_vlog (AUDIO_CAP, fmt, ap);
va_end (ap);
AUD_log (AUDIO_CAP, "Reason: %s\n", pa_strerror (err));
}
#ifndef PA_CONTEXT_IS_GOOD
static inline int PA_CONTEXT_IS_GOOD(pa_context_state_t x)
{
return
x == PA_CONTEXT_CONNECTING ||
x == PA_CONTEXT_AUTHORIZING ||
x == PA_CONTEXT_SETTING_NAME ||
x == PA_CONTEXT_READY;
}
#endif
#ifndef PA_STREAM_IS_GOOD
static inline int PA_STREAM_IS_GOOD(pa_stream_state_t x)
{
return
x == PA_STREAM_CREATING ||
x == PA_STREAM_READY;
}
#endif
#define CHECK_SUCCESS_GOTO(c, expression, label, msg) \
do { \
if (!(expression)) { \
qpa_logerr(pa_context_errno((c)->context), msg); \
goto label; \
} \
} while (0)
#define CHECK_DEAD_GOTO(c, stream, label, msg) \
do { \
if (!(c)->context || !PA_CONTEXT_IS_GOOD (pa_context_get_state((c)->context)) || \
!(stream) || !PA_STREAM_IS_GOOD (pa_stream_get_state ((stream)))) { \
if (((c)->context && pa_context_get_state ((c)->context) == PA_CONTEXT_FAILED) || \
((stream) && pa_stream_get_state ((stream)) == PA_STREAM_FAILED)) { \
qpa_logerr(pa_context_errno((c)->context), msg); \
} else { \
qpa_logerr(PA_ERR_BADSTATE, msg); \
} \
goto label; \
} \
} while (0)
static void *qpa_get_buffer_in(HWVoiceIn *hw, size_t *size)
{
PAVoiceIn *p = (PAVoiceIn *) hw;
PAConnection *c = p->g->conn;
int r;
pa_threaded_mainloop_lock(c->mainloop);
CHECK_DEAD_GOTO(c, p->stream, unlock_and_fail,
"pa_threaded_mainloop_lock failed\n");
if (!p->read_length) {
r = pa_stream_peek(p->stream, &p->read_data, &p->read_length);
CHECK_SUCCESS_GOTO(c, r == 0, unlock_and_fail,
"pa_stream_peek failed\n");
}
*size = MIN(p->read_length, *size);
pa_threaded_mainloop_unlock(c->mainloop);
return (void *) p->read_data;
unlock_and_fail:
pa_threaded_mainloop_unlock(c->mainloop);
*size = 0;
return NULL;
}
static void qpa_put_buffer_in(HWVoiceIn *hw, void *buf, size_t size)
{
PAVoiceIn *p = (PAVoiceIn *) hw;
PAConnection *c = p->g->conn;
int r;
pa_threaded_mainloop_lock(c->mainloop);
CHECK_DEAD_GOTO(c, p->stream, unlock,
"pa_threaded_mainloop_lock failed\n");
assert(buf == p->read_data && size <= p->read_length);
p->read_data += size;
p->read_length -= size;
if (size && !p->read_length) {
r = pa_stream_drop(p->stream);
CHECK_SUCCESS_GOTO(c, r == 0, unlock, "pa_stream_drop failed\n");
}
unlock:
pa_threaded_mainloop_unlock(c->mainloop);
}
static size_t qpa_read(HWVoiceIn *hw, void *data, size_t length)
{
PAVoiceIn *p = (PAVoiceIn *) hw;
PAConnection *c = p->g->conn;
size_t total = 0;
pa_threaded_mainloop_lock(c->mainloop);
CHECK_DEAD_GOTO(c, p->stream, unlock_and_fail,
"pa_threaded_mainloop_lock failed\n");
if (pa_stream_get_state(p->stream) != PA_STREAM_READY) {
/* wait for stream to become ready */
goto unlock;
}
while (total < length) {
size_t l;
int r;
if (!p->read_length) {
r = pa_stream_peek(p->stream, &p->read_data, &p->read_length);
CHECK_SUCCESS_GOTO(c, r == 0, unlock_and_fail,
"pa_stream_peek failed\n");
if (!p->read_length) {
/* buffer is empty */
break;
}
}
l = MIN(p->read_length, length - total);
memcpy((char *)data + total, p->read_data, l);
p->read_data += l;
p->read_length -= l;
total += l;
if (!p->read_length) {
r = pa_stream_drop(p->stream);
CHECK_SUCCESS_GOTO(c, r == 0, unlock_and_fail,
"pa_stream_drop failed\n");
}
}
unlock:
pa_threaded_mainloop_unlock(c->mainloop);
return total;
unlock_and_fail:
pa_threaded_mainloop_unlock(c->mainloop);
return 0;
}
static size_t qpa_buffer_get_free(HWVoiceOut *hw)
{
PAVoiceOut *p = (PAVoiceOut *)hw;
PAConnection *c = p->g->conn;
size_t l;
pa_threaded_mainloop_lock(c->mainloop);
CHECK_DEAD_GOTO(c, p->stream, unlock_and_fail,
"pa_threaded_mainloop_lock failed\n");
if (pa_stream_get_state(p->stream) != PA_STREAM_READY) {
/* wait for stream to become ready */
l = 0;
goto unlock;
}
l = pa_stream_writable_size(p->stream);
CHECK_SUCCESS_GOTO(c, l != (size_t) -1, unlock_and_fail,
"pa_stream_writable_size failed\n");
unlock:
pa_threaded_mainloop_unlock(c->mainloop);
return l;
unlock_and_fail:
pa_threaded_mainloop_unlock(c->mainloop);
return 0;
}
static void *qpa_get_buffer_out(HWVoiceOut *hw, size_t *size)
{
PAVoiceOut *p = (PAVoiceOut *)hw;
PAConnection *c = p->g->conn;
void *ret;
int r;
pa_threaded_mainloop_lock(c->mainloop);
CHECK_DEAD_GOTO(c, p->stream, unlock_and_fail,
"pa_threaded_mainloop_lock failed\n");
*size = -1;
r = pa_stream_begin_write(p->stream, &ret, size);
CHECK_SUCCESS_GOTO(c, r >= 0, unlock_and_fail,
"pa_stream_begin_write failed\n");
pa_threaded_mainloop_unlock(c->mainloop);
return ret;
unlock_and_fail:
pa_threaded_mainloop_unlock(c->mainloop);
*size = 0;
return NULL;
}
static size_t qpa_put_buffer_out(HWVoiceOut *hw, void *data, size_t length)
{
PAVoiceOut *p = (PAVoiceOut *)hw;
PAConnection *c = p->g->conn;
int r;
pa_threaded_mainloop_lock(c->mainloop);
CHECK_DEAD_GOTO(c, p->stream, unlock_and_fail,
"pa_threaded_mainloop_lock failed\n");
r = pa_stream_write(p->stream, data, length, NULL, 0LL, PA_SEEK_RELATIVE);
CHECK_SUCCESS_GOTO(c, r >= 0, unlock_and_fail, "pa_stream_write failed\n");
pa_threaded_mainloop_unlock(c->mainloop);
return length;
unlock_and_fail:
pa_threaded_mainloop_unlock(c->mainloop);
return 0;
}
static size_t qpa_write(HWVoiceOut *hw, void *data, size_t length)
{
PAVoiceOut *p = (PAVoiceOut *) hw;
PAConnection *c = p->g->conn;
size_t l;
int r;
pa_threaded_mainloop_lock(c->mainloop);
CHECK_DEAD_GOTO(c, p->stream, unlock_and_fail,
"pa_threaded_mainloop_lock failed\n");
if (pa_stream_get_state(p->stream) != PA_STREAM_READY) {
/* wait for stream to become ready */
l = 0;
goto unlock;
}
l = pa_stream_writable_size(p->stream);
CHECK_SUCCESS_GOTO(c, l != (size_t) -1, unlock_and_fail,
"pa_stream_writable_size failed\n");
if (l > length) {
l = length;
}
r = pa_stream_write(p->stream, data, l, NULL, 0LL, PA_SEEK_RELATIVE);
CHECK_SUCCESS_GOTO(c, r >= 0, unlock_and_fail, "pa_stream_write failed\n");
unlock:
pa_threaded_mainloop_unlock(c->mainloop);
return l;
unlock_and_fail:
pa_threaded_mainloop_unlock(c->mainloop);
return 0;
}
static pa_sample_format_t audfmt_to_pa (AudioFormat afmt, int endianness)
{
int format;
switch (afmt) {
case AUDIO_FORMAT_S8:
case AUDIO_FORMAT_U8:
format = PA_SAMPLE_U8;
break;
case AUDIO_FORMAT_S16:
case AUDIO_FORMAT_U16:
format = endianness ? PA_SAMPLE_S16BE : PA_SAMPLE_S16LE;
break;
case AUDIO_FORMAT_S32:
case AUDIO_FORMAT_U32:
format = endianness ? PA_SAMPLE_S32BE : PA_SAMPLE_S32LE;
break;
case AUDIO_FORMAT_F32:
format = endianness ? PA_SAMPLE_FLOAT32BE : PA_SAMPLE_FLOAT32LE;
break;
default:
dolog ("Internal logic error: Bad audio format %d\n", afmt);
format = PA_SAMPLE_U8;
break;
}
return format;
}
static AudioFormat pa_to_audfmt (pa_sample_format_t fmt, int *endianness)
{
switch (fmt) {
case PA_SAMPLE_U8:
return AUDIO_FORMAT_U8;
case PA_SAMPLE_S16BE:
*endianness = 1;
return AUDIO_FORMAT_S16;
case PA_SAMPLE_S16LE:
*endianness = 0;
return AUDIO_FORMAT_S16;
case PA_SAMPLE_S32BE:
*endianness = 1;
return AUDIO_FORMAT_S32;
case PA_SAMPLE_S32LE:
*endianness = 0;
return AUDIO_FORMAT_S32;
case PA_SAMPLE_FLOAT32BE:
*endianness = 1;
return AUDIO_FORMAT_F32;
case PA_SAMPLE_FLOAT32LE:
*endianness = 0;
return AUDIO_FORMAT_F32;
default:
dolog ("Internal logic error: Bad pa_sample_format %d\n", fmt);
return AUDIO_FORMAT_U8;
}
}
static void context_state_cb (pa_context *c, void *userdata)
{
PAConnection *conn = userdata;
switch (pa_context_get_state(c)) {
case PA_CONTEXT_READY:
case PA_CONTEXT_TERMINATED:
case PA_CONTEXT_FAILED:
pa_threaded_mainloop_signal(conn->mainloop, 0);
break;
case PA_CONTEXT_UNCONNECTED:
case PA_CONTEXT_CONNECTING:
case PA_CONTEXT_AUTHORIZING:
case PA_CONTEXT_SETTING_NAME:
break;
}
}
static void stream_state_cb (pa_stream *s, void * userdata)
{
PAConnection *c = userdata;
switch (pa_stream_get_state (s)) {
case PA_STREAM_READY:
case PA_STREAM_FAILED:
case PA_STREAM_TERMINATED:
pa_threaded_mainloop_signal(c->mainloop, 0);
break;
case PA_STREAM_UNCONNECTED:
case PA_STREAM_CREATING:
break;
}
}
static pa_stream *qpa_simple_new (
PAConnection *c,
const char *name,
pa_stream_direction_t dir,
const char *dev,
const pa_sample_spec *ss,
const pa_buffer_attr *attr,
int *rerror)
{
int r;
pa_stream *stream = NULL;
pa_stream_flags_t flags;
pa_channel_map map;
pa_threaded_mainloop_lock(c->mainloop);
pa_channel_map_init(&map);
map.channels = ss->channels;
/*
* TODO: This currently expects the only frontend supporting more than 2
* channels is the usb-audio. We will need some means to set channel
* order when a new frontend gains multi-channel support.
*/
switch (ss->channels) {
case 1:
map.map[0] = PA_CHANNEL_POSITION_MONO;
break;
case 2:
map.map[0] = PA_CHANNEL_POSITION_LEFT;
map.map[1] = PA_CHANNEL_POSITION_RIGHT;
break;
case 6:
map.map[0] = PA_CHANNEL_POSITION_FRONT_LEFT;
map.map[1] = PA_CHANNEL_POSITION_FRONT_RIGHT;
map.map[2] = PA_CHANNEL_POSITION_CENTER;
map.map[3] = PA_CHANNEL_POSITION_LFE;
map.map[4] = PA_CHANNEL_POSITION_REAR_LEFT;
map.map[5] = PA_CHANNEL_POSITION_REAR_RIGHT;
break;
case 8:
map.map[0] = PA_CHANNEL_POSITION_FRONT_LEFT;
map.map[1] = PA_CHANNEL_POSITION_FRONT_RIGHT;
map.map[2] = PA_CHANNEL_POSITION_CENTER;
map.map[3] = PA_CHANNEL_POSITION_LFE;
map.map[4] = PA_CHANNEL_POSITION_REAR_LEFT;
map.map[5] = PA_CHANNEL_POSITION_REAR_RIGHT;
map.map[6] = PA_CHANNEL_POSITION_SIDE_LEFT;
map.map[7] = PA_CHANNEL_POSITION_SIDE_RIGHT;
break;
default:
dolog("Internal error: unsupported channel count %d\n", ss->channels);
goto fail;
}
stream = pa_stream_new(c->context, name, ss, &map);
if (!stream) {
goto fail;
}
pa_stream_set_state_callback(stream, stream_state_cb, c);
flags = PA_STREAM_EARLY_REQUESTS;
if (dev) {
/* don't move the stream if the user specified a sink/source */
flags |= PA_STREAM_DONT_MOVE;
}
if (dir == PA_STREAM_PLAYBACK) {
r = pa_stream_connect_playback(stream, dev, attr, flags, NULL, NULL);
} else {
r = pa_stream_connect_record(stream, dev, attr, flags);
}
if (r < 0) {
goto fail;
}
pa_threaded_mainloop_unlock(c->mainloop);
return stream;
fail:
pa_threaded_mainloop_unlock(c->mainloop);
if (stream) {
pa_stream_unref (stream);
}
*rerror = pa_context_errno(c->context);
return NULL;
}
static int qpa_init_out(HWVoiceOut *hw, struct audsettings *as,
void *drv_opaque)
{
int error;
pa_sample_spec ss;
pa_buffer_attr ba;
struct audsettings obt_as = *as;
PAVoiceOut *pa = (PAVoiceOut *) hw;
paaudio *g = pa->g = drv_opaque;
AudiodevPaOptions *popts = &g->dev->u.pa;
AudiodevPaPerDirectionOptions *ppdo = popts->out;
PAConnection *c = g->conn;
ss.format = audfmt_to_pa (as->fmt, as->endianness);
ss.channels = as->nchannels;
ss.rate = as->freq;
ba.tlength = pa_usec_to_bytes(ppdo->latency, &ss);
ba.minreq = pa_usec_to_bytes(MIN(ppdo->latency >> 2,
(g->dev->timer_period >> 2) * 3), &ss);
ba.maxlength = -1;
ba.prebuf = -1;
obt_as.fmt = pa_to_audfmt (ss.format, &obt_as.endianness);
pa->stream = qpa_simple_new (
c,
ppdo->stream_name ?: g->dev->id,
PA_STREAM_PLAYBACK,
ppdo->name,
&ss,
&ba, /* buffering attributes */
&error
);
if (!pa->stream) {
qpa_logerr (error, "pa_simple_new for playback failed\n");
goto fail1;
}
audio_pcm_init_info (&hw->info, &obt_as);
/* hw->samples counts in frames */
hw->samples = audio_buffer_frames(
qapi_AudiodevPaPerDirectionOptions_base(ppdo), &obt_as, 46440);
return 0;
fail1:
return -1;
}
static int qpa_init_in(HWVoiceIn *hw, struct audsettings *as, void *drv_opaque)
{
int error;
pa_sample_spec ss;
pa_buffer_attr ba;
struct audsettings obt_as = *as;
PAVoiceIn *pa = (PAVoiceIn *) hw;
paaudio *g = pa->g = drv_opaque;
AudiodevPaOptions *popts = &g->dev->u.pa;
AudiodevPaPerDirectionOptions *ppdo = popts->in;
PAConnection *c = g->conn;
ss.format = audfmt_to_pa (as->fmt, as->endianness);
ss.channels = as->nchannels;
ss.rate = as->freq;
ba.fragsize = pa_usec_to_bytes((g->dev->timer_period >> 1) * 3, &ss);
ba.maxlength = pa_usec_to_bytes(
MAX(ppdo->latency, g->dev->timer_period * 3), &ss);
ba.minreq = -1;
ba.prebuf = -1;
obt_as.fmt = pa_to_audfmt (ss.format, &obt_as.endianness);
pa->stream = qpa_simple_new (
c,
ppdo->stream_name ?: g->dev->id,
PA_STREAM_RECORD,
ppdo->name,
&ss,
&ba, /* buffering attributes */
&error
);
if (!pa->stream) {
qpa_logerr (error, "pa_simple_new for capture failed\n");
goto fail1;
}
audio_pcm_init_info (&hw->info, &obt_as);
/* hw->samples counts in frames */
hw->samples = audio_buffer_frames(
qapi_AudiodevPaPerDirectionOptions_base(ppdo), &obt_as, 46440);
return 0;
fail1:
return -1;
}
static void qpa_simple_disconnect(PAConnection *c, pa_stream *stream)
{
int err;
/*
* wait until actually connects. workaround pa bug #247
* https://gitlab.freedesktop.org/pulseaudio/pulseaudio/issues/247
*/
while (pa_stream_get_state(stream) == PA_STREAM_CREATING) {
pa_threaded_mainloop_wait(c->mainloop);
}
err = pa_stream_disconnect(stream);
if (err != 0) {
dolog("Failed to disconnect! err=%d\n", err);
}
pa_stream_unref(stream);
}
static void qpa_fini_out (HWVoiceOut *hw)
{
PAVoiceOut *pa = (PAVoiceOut *) hw;
if (pa->stream) {
PAConnection *c = pa->g->conn;
pa_threaded_mainloop_lock(c->mainloop);
qpa_simple_disconnect(c, pa->stream);
pa->stream = NULL;
pa_threaded_mainloop_unlock(c->mainloop);
}
}
static void qpa_fini_in (HWVoiceIn *hw)
{
PAVoiceIn *pa = (PAVoiceIn *) hw;
if (pa->stream) {
PAConnection *c = pa->g->conn;
pa_threaded_mainloop_lock(c->mainloop);
if (pa->read_length) {
int r = pa_stream_drop(pa->stream);
if (r) {
qpa_logerr(pa_context_errno(c->context),
"pa_stream_drop failed\n");
}
pa->read_length = 0;
}
qpa_simple_disconnect(c, pa->stream);
pa->stream = NULL;
pa_threaded_mainloop_unlock(c->mainloop);
}
}
static void qpa_volume_out(HWVoiceOut *hw, Volume *vol)
{
PAVoiceOut *pa = (PAVoiceOut *) hw;
pa_operation *op;
pa_cvolume v;
PAConnection *c = pa->g->conn;
int i;
#ifdef PA_CHECK_VERSION /* macro is present in 0.9.16+ */
pa_cvolume_init (&v); /* function is present in 0.9.13+ */
#endif
v.channels = vol->channels;
for (i = 0; i < vol->channels; ++i) {
v.values[i] = ((PA_VOLUME_NORM - PA_VOLUME_MUTED) * vol->vol[i]) / 255;
}
pa_threaded_mainloop_lock(c->mainloop);
op = pa_context_set_sink_input_volume(c->context,
pa_stream_get_index(pa->stream),
&v, NULL, NULL);
if (!op) {
qpa_logerr(pa_context_errno(c->context),
"set_sink_input_volume() failed\n");
} else {
pa_operation_unref(op);
}
op = pa_context_set_sink_input_mute(c->context,
pa_stream_get_index(pa->stream),
vol->mute, NULL, NULL);
if (!op) {
qpa_logerr(pa_context_errno(c->context),
"set_sink_input_mute() failed\n");
} else {
pa_operation_unref(op);
}
pa_threaded_mainloop_unlock(c->mainloop);
}
static void qpa_volume_in(HWVoiceIn *hw, Volume *vol)
{
PAVoiceIn *pa = (PAVoiceIn *) hw;
pa_operation *op;
pa_cvolume v;
PAConnection *c = pa->g->conn;
int i;
#ifdef PA_CHECK_VERSION
pa_cvolume_init (&v);
#endif
v.channels = vol->channels;
for (i = 0; i < vol->channels; ++i) {
v.values[i] = ((PA_VOLUME_NORM - PA_VOLUME_MUTED) * vol->vol[i]) / 255;
}
pa_threaded_mainloop_lock(c->mainloop);
op = pa_context_set_source_output_volume(c->context,
pa_stream_get_index(pa->stream),
&v, NULL, NULL);
if (!op) {
qpa_logerr(pa_context_errno(c->context),
"set_source_output_volume() failed\n");
} else {
pa_operation_unref(op);
}
op = pa_context_set_source_output_mute(c->context,
pa_stream_get_index(pa->stream),
vol->mute, NULL, NULL);
if (!op) {
qpa_logerr(pa_context_errno(c->context),
"set_source_output_mute() failed\n");
} else {
pa_operation_unref(op);
}
pa_threaded_mainloop_unlock(c->mainloop);
}
static int qpa_validate_per_direction_opts(Audiodev *dev,
AudiodevPaPerDirectionOptions *pdo)
{
if (!pdo->has_latency) {
pdo->has_latency = true;
pdo->latency = 46440;
}
return 1;
}
/* common */
static void *qpa_conn_init(const char *server)
{
PAConnection *c = g_new0(PAConnection, 1);
QTAILQ_INSERT_TAIL(&pa_conns, c, list);
c->mainloop = pa_threaded_mainloop_new();
if (!c->mainloop) {
goto fail;
}
c->context = pa_context_new(pa_threaded_mainloop_get_api(c->mainloop),
audio_application_name());
if (!c->context) {
goto fail;
}
pa_context_set_state_callback(c->context, context_state_cb, c);
if (pa_context_connect(c->context, server, 0, NULL) < 0) {
qpa_logerr(pa_context_errno(c->context),
"pa_context_connect() failed\n");
goto fail;
}
pa_threaded_mainloop_lock(c->mainloop);
if (pa_threaded_mainloop_start(c->mainloop) < 0) {
goto unlock_and_fail;
}
for (;;) {
pa_context_state_t state;
state = pa_context_get_state(c->context);
if (state == PA_CONTEXT_READY) {
break;
}
if (!PA_CONTEXT_IS_GOOD(state)) {
qpa_logerr(pa_context_errno(c->context),
"Wrong context state\n");
goto unlock_and_fail;
}
/* Wait until the context is ready */
pa_threaded_mainloop_wait(c->mainloop);
}
pa_threaded_mainloop_unlock(c->mainloop);
return c;
unlock_and_fail:
pa_threaded_mainloop_unlock(c->mainloop);
fail:
AUD_log (AUDIO_CAP, "Failed to initialize PA context");
qpa_conn_fini(c);
return NULL;
}
static void *qpa_audio_init(Audiodev *dev, Error **errp)
{
paaudio *g;
AudiodevPaOptions *popts = &dev->u.pa;
const char *server;
PAConnection *c;
assert(dev->driver == AUDIODEV_DRIVER_PA);
if (!popts->server) {
char pidfile[64];
char *runtime;
struct stat st;
runtime = getenv("XDG_RUNTIME_DIR");
if (!runtime) {
error_setg(errp, "XDG_RUNTIME_DIR not set");
return NULL;
}
snprintf(pidfile, sizeof(pidfile), "%s/pulse/pid", runtime);
if (stat(pidfile, &st) != 0) {
error_setg_errno(errp, errno, "could not stat pidfile %s", pidfile);
return NULL;
}
}
if (!qpa_validate_per_direction_opts(dev, popts->in)) {
return NULL;
}
if (!qpa_validate_per_direction_opts(dev, popts->out)) {
return NULL;
}
g = g_new0(paaudio, 1);
server = popts->server;
g->dev = dev;
QTAILQ_FOREACH(c, &pa_conns, list) {
if (server == NULL || c->server == NULL ?
server == c->server :
strcmp(server, c->server) == 0) {
g->conn = c;
break;
}
}
if (!g->conn) {
g->conn = qpa_conn_init(server);
}
if (!g->conn) {
g_free(g);
error_setg(errp, "could not connect to PulseAudio server");
return NULL;
}
++g->conn->refcount;
return g;
}
static void qpa_conn_fini(PAConnection *c)
{
if (c->mainloop) {
pa_threaded_mainloop_stop(c->mainloop);
}
if (c->context) {
pa_context_disconnect(c->context);
pa_context_unref(c->context);
}
if (c->mainloop) {
pa_threaded_mainloop_free(c->mainloop);
}
QTAILQ_REMOVE(&pa_conns, c, list);
g_free(c);
}
static void qpa_audio_fini (void *opaque)
{
paaudio *g = opaque;
PAConnection *c = g->conn;
if (--c->refcount == 0) {
qpa_conn_fini(c);
}
g_free(g);
}
static struct audio_pcm_ops qpa_pcm_ops = {
.init_out = qpa_init_out,
.fini_out = qpa_fini_out,
.write = qpa_write,
.buffer_get_free = qpa_buffer_get_free,
.get_buffer_out = qpa_get_buffer_out,
.put_buffer_out = qpa_put_buffer_out,
.volume_out = qpa_volume_out,
.init_in = qpa_init_in,
.fini_in = qpa_fini_in,
.read = qpa_read,
.get_buffer_in = qpa_get_buffer_in,
.put_buffer_in = qpa_put_buffer_in,
.volume_in = qpa_volume_in
};
static struct audio_driver pa_audio_driver = {
.name = "pa",
.descr = "http://www.pulseaudio.org/",
.init = qpa_audio_init,
.fini = qpa_audio_fini,
.pcm_ops = &qpa_pcm_ops,
.max_voices_out = INT_MAX,
.max_voices_in = INT_MAX,
.voice_size_out = sizeof (PAVoiceOut),
.voice_size_in = sizeof (PAVoiceIn),
};
static void register_audio_pa(void)
{
audio_driver_register(&pa_audio_driver);
}
type_init(register_audio_pa);
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