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qemu-e2k/audio/paaudio.c

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/* public domain */
#include "qemu/osdep.h"
#include "qemu/module.h"
#include "audio.h"
#include "qapi/opts-visitor.h"
#include <pulse/pulseaudio.h>
#define AUDIO_CAP "pulseaudio"
#include "audio_int.h"
#include "audio_pt_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;
size_t done;
size_t live;
size_t decr;
size_t rpos;
pa_stream *stream;
void *pcm_buf;
struct audio_pt pt;
paaudio *g;
size_t samples;
} PAVoiceOut;
typedef struct {
HWVoiceIn hw;
size_t done;
size_t dead;
size_t incr;
size_t wpos;
pa_stream *stream;
void *pcm_buf;
struct audio_pt pt;
const void *read_data;
size_t read_index, read_length;
paaudio *g;
size_t samples;
} PAVoiceIn;
static void qpa_conn_fini(PAConnection *c);
static void GCC_FMT_ATTR (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, rerror, expression, label) \
do { \
if (!(expression)) { \
if (rerror) { \
*(rerror) = pa_context_errno ((c)->context); \
} \
goto label; \
} \
} while (0)
#define CHECK_DEAD_GOTO(c, stream, rerror, label) \
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)) { \
if (rerror) { \
*(rerror) = pa_context_errno ((c)->context); \
} \
} else { \
if (rerror) { \
*(rerror) = PA_ERR_BADSTATE; \
} \
} \
goto label; \
} \
} while (0)
static int qpa_simple_read (PAVoiceIn *p, void *data, size_t length, int *rerror)
{
PAConnection *c = p->g->conn;
pa_threaded_mainloop_lock(c->mainloop);
CHECK_DEAD_GOTO(c, p->stream, rerror, unlock_and_fail);
while (length > 0) {
size_t l;
while (!p->read_data) {
int r;
r = pa_stream_peek (p->stream, &p->read_data, &p->read_length);
CHECK_SUCCESS_GOTO(c, rerror, r == 0, unlock_and_fail);
if (!p->read_data) {
pa_threaded_mainloop_wait(c->mainloop);
CHECK_DEAD_GOTO(c, p->stream, rerror, unlock_and_fail);
} else {
p->read_index = 0;
}
}
l = p->read_length < length ? p->read_length : length;
memcpy (data, (const uint8_t *) p->read_data+p->read_index, l);
data = (uint8_t *) data + l;
length -= l;
p->read_index += l;
p->read_length -= l;
if (!p->read_length) {
int r;
r = pa_stream_drop (p->stream);
p->read_data = NULL;
p->read_length = 0;
p->read_index = 0;
CHECK_SUCCESS_GOTO(c, rerror, r == 0, unlock_and_fail);
}
}
pa_threaded_mainloop_unlock(c->mainloop);
return 0;
unlock_and_fail:
pa_threaded_mainloop_unlock(c->mainloop);
return -1;
}
static int qpa_simple_write (PAVoiceOut *p, const void *data, size_t length, int *rerror)
{
PAConnection *c = p->g->conn;
pa_threaded_mainloop_lock(c->mainloop);
CHECK_DEAD_GOTO(c, p->stream, rerror, unlock_and_fail);
while (length > 0) {
size_t l;
int r;
while (!(l = pa_stream_writable_size (p->stream))) {
pa_threaded_mainloop_wait(c->mainloop);
CHECK_DEAD_GOTO(c, p->stream, rerror, unlock_and_fail);
}
CHECK_SUCCESS_GOTO(c, rerror, l != (size_t) -1, unlock_and_fail);
if (l > length) {
l = length;
}
r = pa_stream_write (p->stream, data, l, NULL, 0LL, PA_SEEK_RELATIVE);
CHECK_SUCCESS_GOTO(c, rerror, r >= 0, unlock_and_fail);
data = (const uint8_t *) data + l;
length -= l;
}
pa_threaded_mainloop_unlock(c->mainloop);
return 0;
unlock_and_fail:
pa_threaded_mainloop_unlock(c->mainloop);
return -1;
}
static void *qpa_thread_out (void *arg)
{
PAVoiceOut *pa = arg;
HWVoiceOut *hw = &pa->hw;
if (audio_pt_lock(&pa->pt, __func__)) {
return NULL;
}
for (;;) {
size_t decr, to_mix, rpos;
for (;;) {
if (pa->done) {
goto exit;
}
if (pa->live > 0) {
break;
}
if (audio_pt_wait(&pa->pt, __func__)) {
goto exit;
}
}
decr = to_mix = MIN(pa->live, pa->samples >> 5);
rpos = pa->rpos;
if (audio_pt_unlock(&pa->pt, __func__)) {
return NULL;
}
while (to_mix) {
int error;
size_t chunk = MIN (to_mix, hw->samples - rpos);
struct st_sample *src = hw->mix_buf + rpos;
hw->clip (pa->pcm_buf, src, chunk);
if (qpa_simple_write (pa, pa->pcm_buf,
chunk << hw->info.shift, &error) < 0) {
qpa_logerr (error, "pa_simple_write failed\n");
return NULL;
}
rpos = (rpos + chunk) % hw->samples;
to_mix -= chunk;
}
if (audio_pt_lock(&pa->pt, __func__)) {
return NULL;
}
pa->rpos = rpos;
pa->live -= decr;
pa->decr += decr;
}
exit:
audio_pt_unlock(&pa->pt, __func__);
return NULL;
}
static size_t qpa_run_out(HWVoiceOut *hw, size_t live)
{
size_t decr;
PAVoiceOut *pa = (PAVoiceOut *) hw;
if (audio_pt_lock(&pa->pt, __func__)) {
return 0;
}
decr = MIN (live, pa->decr);
pa->decr -= decr;
pa->live = live - decr;
hw->rpos = pa->rpos;
if (pa->live > 0) {
audio_pt_unlock_and_signal(&pa->pt, __func__);
}
else {
audio_pt_unlock(&pa->pt, __func__);
}
return decr;
}
/* capture */
static void *qpa_thread_in (void *arg)
{
PAVoiceIn *pa = arg;
HWVoiceIn *hw = &pa->hw;
if (audio_pt_lock(&pa->pt, __func__)) {
return NULL;
}
for (;;) {
size_t incr, to_grab, wpos;
for (;;) {
if (pa->done) {
goto exit;
}
if (pa->dead > 0) {
break;
}
if (audio_pt_wait(&pa->pt, __func__)) {
goto exit;
}
}
incr = to_grab = MIN(pa->dead, pa->samples >> 5);
wpos = pa->wpos;
if (audio_pt_unlock(&pa->pt, __func__)) {
return NULL;
}
while (to_grab) {
int error;
size_t chunk = MIN (to_grab, hw->samples - wpos);
void *buf = advance (pa->pcm_buf, wpos);
if (qpa_simple_read (pa, buf,
chunk << hw->info.shift, &error) < 0) {
qpa_logerr (error, "pa_simple_read failed\n");
return NULL;
}
hw->conv (hw->conv_buf + wpos, buf, chunk);
wpos = (wpos + chunk) % hw->samples;
to_grab -= chunk;
}
if (audio_pt_lock(&pa->pt, __func__)) {
return NULL;
}
pa->wpos = wpos;
pa->dead -= incr;
pa->incr += incr;
}
exit:
audio_pt_unlock(&pa->pt, __func__);
return NULL;
}
static size_t qpa_run_in(HWVoiceIn *hw)
{
size_t live, incr, dead;
PAVoiceIn *pa = (PAVoiceIn *) hw;
if (audio_pt_lock(&pa->pt, __func__)) {
return 0;
}
live = audio_pcm_hw_get_live_in (hw);
dead = hw->samples - live;
incr = MIN (dead, pa->incr);
pa->incr -= incr;
pa->dead = dead - incr;
hw->wpos = pa->wpos;
if (pa->dead > 0) {
audio_pt_unlock_and_signal(&pa->pt, __func__);
}
else {
audio_pt_unlock(&pa->pt, __func__);
}
return incr;
}
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;
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;
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 void stream_request_cb (pa_stream *s, size_t length, void *userdata)
{
PAConnection *c = userdata;
pa_threaded_mainloop_signal(c->mainloop, 0);
}
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_channel_map *map,
const pa_buffer_attr *attr,
int *rerror)
{
int r;
pa_stream *stream;
pa_stream_flags_t flags;
pa_threaded_mainloop_lock(c->mainloop);
stream = pa_stream_new(c->context, name, ss, map);
if (!stream) {
goto fail;
}
pa_stream_set_state_callback(stream, stream_state_cb, c);
pa_stream_set_read_callback(stream, stream_request_cb, c);
pa_stream_set_write_callback(stream, stream_request_cb, c);
flags =
PA_STREAM_INTERPOLATE_TIMING
| PA_STREAM_AUTO_TIMING_UPDATE
| 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 = -1;
ba.maxlength = -1;
ba.prebuf = -1;
obt_as.fmt = pa_to_audfmt (ss.format, &obt_as.endianness);
pa->stream = qpa_simple_new (
c,
"qemu",
PA_STREAM_PLAYBACK,
ppdo->has_name ? ppdo->name : NULL,
&ss,
NULL, /* channel map */
&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 = pa->samples = audio_buffer_samples(
qapi_AudiodevPaPerDirectionOptions_base(ppdo),
&obt_as, ppdo->buffer_length);
pa->pcm_buf = audio_calloc(__func__, hw->samples, 1 << hw->info.shift);
pa->rpos = hw->rpos;
if (!pa->pcm_buf) {
dolog("Could not allocate buffer (%zu bytes)\n",
hw->samples << hw->info.shift);
goto fail2;
}
if (audio_pt_init(&pa->pt, qpa_thread_out, hw, AUDIO_CAP, __func__)) {
goto fail3;
}
return 0;
fail3:
g_free (pa->pcm_buf);
pa->pcm_buf = NULL;
fail2:
if (pa->stream) {
pa_stream_unref (pa->stream);
pa->stream = NULL;
}
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(ppdo->latency, &ss);
ba.maxlength = pa_usec_to_bytes(ppdo->latency * 2, &ss);
ba.minreq = -1;
ba.prebuf = -1;
obt_as.fmt = pa_to_audfmt (ss.format, &obt_as.endianness);
pa->stream = qpa_simple_new (
c,
"qemu",
PA_STREAM_RECORD,
ppdo->has_name ? ppdo->name : NULL,
&ss,
NULL, /* channel map */
&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 = pa->samples = audio_buffer_samples(
qapi_AudiodevPaPerDirectionOptions_base(ppdo),
&obt_as, ppdo->buffer_length);
pa->pcm_buf = audio_calloc(__func__, hw->samples, 1 << hw->info.shift);
pa->wpos = hw->wpos;
if (!pa->pcm_buf) {
dolog("Could not allocate buffer (%zu bytes)\n",
hw->samples << hw->info.shift);
goto fail2;
}
if (audio_pt_init(&pa->pt, qpa_thread_in, hw, AUDIO_CAP, __func__)) {
goto fail3;
}
return 0;
fail3:
g_free (pa->pcm_buf);
pa->pcm_buf = NULL;
fail2:
if (pa->stream) {
pa_stream_unref (pa->stream);
pa->stream = NULL;
}
fail1:
return -1;
}
static void qpa_simple_disconnect(PAConnection *c, pa_stream *stream)
{
int err;
pa_threaded_mainloop_lock(c->mainloop);
/*
* 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);
pa_threaded_mainloop_unlock(c->mainloop);
}
static void qpa_fini_out (HWVoiceOut *hw)
{
void *ret;
PAVoiceOut *pa = (PAVoiceOut *) hw;
audio_pt_lock(&pa->pt, __func__);
pa->done = 1;
audio_pt_unlock_and_signal(&pa->pt, __func__);
audio_pt_join(&pa->pt, &ret, __func__);
if (pa->stream) {
qpa_simple_disconnect(pa->g->conn, pa->stream);
pa->stream = NULL;
}
audio_pt_fini(&pa->pt, __func__);
g_free (pa->pcm_buf);
pa->pcm_buf = NULL;
}
static void qpa_fini_in (HWVoiceIn *hw)
{
void *ret;
PAVoiceIn *pa = (PAVoiceIn *) hw;
audio_pt_lock(&pa->pt, __func__);
pa->done = 1;
audio_pt_unlock_and_signal(&pa->pt, __func__);
audio_pt_join(&pa->pt, &ret, __func__);
if (pa->stream) {
qpa_simple_disconnect(pa->g->conn, pa->stream);
pa->stream = NULL;
}
audio_pt_fini(&pa->pt, __func__);
g_free (pa->pcm_buf);
pa->pcm_buf = NULL;
}
static int qpa_ctl_out (HWVoiceOut *hw, int cmd, ...)
{
PAVoiceOut *pa = (PAVoiceOut *) hw;
pa_operation *op;
pa_cvolume v;
PAConnection *c = pa->g->conn;
#ifdef PA_CHECK_VERSION /* macro is present in 0.9.16+ */
pa_cvolume_init (&v); /* function is present in 0.9.13+ */
#endif
switch (cmd) {
case VOICE_VOLUME:
{
SWVoiceOut *sw;
va_list ap;
va_start (ap, cmd);
sw = va_arg (ap, SWVoiceOut *);
va_end (ap);
v.channels = 2;
v.values[0] = ((PA_VOLUME_NORM - PA_VOLUME_MUTED) * sw->vol.l) / UINT32_MAX;
v.values[1] = ((PA_VOLUME_NORM - PA_VOLUME_MUTED) * sw->vol.r) / UINT32_MAX;
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),
sw->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);
}
}
return 0;
}
static int qpa_ctl_in (HWVoiceIn *hw, int cmd, ...)
{
PAVoiceIn *pa = (PAVoiceIn *) hw;
pa_operation *op;
pa_cvolume v;
PAConnection *c = pa->g->conn;
#ifdef PA_CHECK_VERSION
pa_cvolume_init (&v);
#endif
switch (cmd) {
case VOICE_VOLUME:
{
SWVoiceIn *sw;
va_list ap;
va_start (ap, cmd);
sw = va_arg (ap, SWVoiceIn *);
va_end (ap);
v.channels = 2;
v.values[0] = ((PA_VOLUME_NORM - PA_VOLUME_MUTED) * sw->vol.l) / UINT32_MAX;
v.values[1] = ((PA_VOLUME_NORM - PA_VOLUME_MUTED) * sw->vol.r) / UINT32_MAX;
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),
sw->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);
}
}
return 0;
}
static int qpa_validate_per_direction_opts(Audiodev *dev,
AudiodevPaPerDirectionOptions *pdo)
{
if (!pdo->has_buffer_length) {
pdo->has_buffer_length = true;
pdo->buffer_length = 46440;
}
if (!pdo->has_latency) {
pdo->has_latency = true;
pdo->latency = 15000;
}
return 1;
}
/* common */
static void *qpa_conn_init(const char *server)
{
PAConnection *c = g_malloc0(sizeof(PAConnection));
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),
server);
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)
{
paaudio *g;
AudiodevPaOptions *popts = &dev->u.pa;
const char *server;
PAConnection *c;
assert(dev->driver == AUDIODEV_DRIVER_PA);
if (!popts->has_server) {
char pidfile[64];
char *runtime;
struct stat st;
runtime = getenv("XDG_RUNTIME_DIR");
if (!runtime) {
return NULL;
}
snprintf(pidfile, sizeof(pidfile), "%s/pulse/pid", runtime);
if (stat(pidfile, &st) != 0) {
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_malloc0(sizeof(paaudio));
server = popts->has_server ? popts->server : NULL;
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);
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,
.run_out = qpa_run_out,
.ctl_out = qpa_ctl_out,
.init_in = qpa_init_in,
.fini_in = qpa_fini_in,
.run_in = qpa_run_in,
.ctl_in = qpa_ctl_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,
.can_be_default = 1,
.max_voices_out = INT_MAX,
.max_voices_in = INT_MAX,
.voice_size_out = sizeof (PAVoiceOut),
.voice_size_in = sizeof (PAVoiceIn),
.ctl_caps = VOICE_VOLUME_CAP
};
static void register_audio_pa(void)
{
audio_driver_register(&pa_audio_driver);
}
type_init(register_audio_pa);
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