Unfortunately, pa_simple is a limited API which doesn't let us
retrieve the associated pa_stream. It is needed to control the volume
of the stream.
---
audio/paaudio.c | 356 +++++++++++++++++++++++++++++++++++++++++++++++++------
1 files changed, 318 insertions(+), 38 deletions(-)
diff --git a/audio/paaudio.c b/audio/paaudio.c
index d1f3912..beed434 100644
--- a/audio/paaudio.c
+++ b/audio/paaudio.c
@@ -2,8 +2,7 @@
#include "qemu-common.h"
#include "audio.h"
-#include <pulse/simple.h>
-#include <pulse/error.h>
+#include <pulse/pulseaudio.h>
#define AUDIO_CAP "pulseaudio"
#include "audio_int.h"
@@ -15,7 +14,7 @@ typedef struct {
int live;
int decr;
int rpos;
- pa_simple *s;
+ pa_stream *stream;
void *pcm_buf;
struct audio_pt pt;
} PAVoiceOut;
@@ -26,17 +25,23 @@ typedef struct {
int dead;
int incr;
int wpos;
- pa_simple *s;
+ pa_stream *stream;
void *pcm_buf;
struct audio_pt pt;
+ const void *read_data;
+ size_t read_index, read_length;
} PAVoiceIn;
-static struct {
+typedef struct {
int samples;
char *server;
char *sink;
char *source;
-} conf = {
+ pa_threaded_mainloop *mainloop;
+ pa_context *context;
+} paaudio;
+
+static paaudio glob_paaudio = {
.samples = 4096,
};
@@ -51,6 +56,120 @@ static void GCC_FMT_ATTR (2, 3) qpa_logerr (int err, const
char *fmt, ...)
AUD_log (AUDIO_CAP, "Reason: %s\n", pa_strerror (err));
}
+#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)
+{
+ paaudio *g = &glob_paaudio;
+
+ pa_threaded_mainloop_lock (g->mainloop);
+
+ CHECK_DEAD_GOTO (g, 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 (g, rerror, r == 0, unlock_and_fail);
+
+ if (!p->read_data) {
+ pa_threaded_mainloop_wait (g->mainloop);
+ CHECK_DEAD_GOTO (g, 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 (g, rerror, r == 0, unlock_and_fail);
+ }
+ }
+
+ pa_threaded_mainloop_unlock (g->mainloop);
+ return 0;
+
+unlock_and_fail:
+ pa_threaded_mainloop_unlock (g->mainloop);
+ return -1;
+}
+
+static int qpa_simple_write (PAVoiceOut *p, const void *data, size_t length,
int *rerror)
+{
+ paaudio *g = &glob_paaudio;
+
+ pa_threaded_mainloop_lock(g->mainloop);
+
+ CHECK_DEAD_GOTO (g, 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 (g->mainloop);
+ CHECK_DEAD_GOTO (g, p->stream, rerror, unlock_and_fail);
+ }
+
+ CHECK_SUCCESS_GOTO (g, 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 (g, rerror, r >= 0, unlock_and_fail);
+
+ data = (const uint8_t*) data + l;
+ length -= l;
+ }
+
+ pa_threaded_mainloop_unlock (g->mainloop);
+ return 0;
+
+unlock_and_fail:
+ pa_threaded_mainloop_unlock (g->mainloop);
+ return -1;
+}
+
static void *qpa_thread_out (void *arg)
{
PAVoiceOut *pa = arg;
@@ -77,7 +196,7 @@ static void *qpa_thread_out (void *arg)
}
}
- decr = to_mix = audio_MIN (pa->live, conf.samples >> 2);
+ decr = to_mix = audio_MIN (pa->live, glob_paaudio.samples >> 2);
rpos = pa->rpos;
if (audio_pt_unlock (&pa->pt, AUDIO_FUNC)) {
@@ -91,8 +210,8 @@ static void *qpa_thread_out (void *arg)
hw->clip (pa->pcm_buf, src, chunk);
- if (pa_simple_write (pa->s, pa->pcm_buf,
- chunk << hw->info.shift, &error) < 0) {
+ if (qpa_simple_write (pa, pa->pcm_buf,
+ chunk << hw->info.shift, &error) < 0) {
qpa_logerr (error, "pa_simple_write failed\n");
return NULL;
}
@@ -169,7 +288,7 @@ static void *qpa_thread_in (void *arg)
}
}
- incr = to_grab = audio_MIN (pa->dead, conf.samples >> 2);
+ incr = to_grab = audio_MIN (pa->dead, glob_paaudio.samples >> 2);
wpos = pa->wpos;
if (audio_pt_unlock (&pa->pt, AUDIO_FUNC)) {
@@ -181,8 +300,8 @@ static void *qpa_thread_in (void *arg)
int chunk = audio_MIN (to_grab, hw->samples - wpos);
void *buf = advance (pa->pcm_buf, wpos);
- if (pa_simple_read (pa->s, buf,
- chunk << hw->info.shift, &error) < 0) {
+ if (qpa_simple_read (pa, buf,
+ chunk << hw->info.shift, &error) < 0) {
qpa_logerr (error, "pa_simple_read failed\n");
return NULL;
}
@@ -283,6 +402,104 @@ static audfmt_e pa_to_audfmt (pa_sample_format_t fmt, int
*endianness)
}
}
+static void context_state_cb (pa_context *c, void *userdata)
+{
+ paaudio *g = &glob_paaudio;
+
+ switch (pa_context_get_state(c)) {
+ case PA_CONTEXT_READY:
+ case PA_CONTEXT_TERMINATED:
+ case PA_CONTEXT_FAILED:
+ pa_threaded_mainloop_signal (g->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)
+{
+ paaudio *g = &glob_paaudio;
+
+ switch (pa_stream_get_state (s)) {
+
+ case PA_STREAM_READY:
+ case PA_STREAM_FAILED:
+ case PA_STREAM_TERMINATED:
+ pa_threaded_mainloop_signal (g->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)
+{
+ paaudio *g = &glob_paaudio;
+
+ pa_threaded_mainloop_signal (g->mainloop, 0);
+}
+
+static pa_stream* qpa_simple_new (
+ const char *server,
+ const char *name,
+ pa_stream_direction_t dir,
+ const char *dev,
+ const char *stream_name,
+ const pa_sample_spec *ss,
+ const pa_channel_map *map,
+ const pa_buffer_attr *attr,
+ int *rerror)
+{
+ paaudio *g = &glob_paaudio;
+ int r;
+ pa_stream *stream;
+
+ pa_threaded_mainloop_lock (g->mainloop);
+
+ if (!(stream = pa_stream_new (g->context, name, ss, map)))
+ goto fail;
+
+ pa_stream_set_state_callback (stream, stream_state_cb, g);
+ pa_stream_set_read_callback (stream, stream_request_cb, g);
+ pa_stream_set_write_callback (stream, stream_request_cb, g);
+
+ if (dir == PA_STREAM_PLAYBACK)
+ r = pa_stream_connect_playback (stream, dev, attr,
+ PA_STREAM_INTERPOLATE_TIMING
+ |PA_STREAM_ADJUST_LATENCY
+ |PA_STREAM_AUTO_TIMING_UPDATE, NULL,
NULL);
+ else
+ r = pa_stream_connect_record (stream, dev, attr,
+ PA_STREAM_INTERPOLATE_TIMING
+ |PA_STREAM_ADJUST_LATENCY
+ |PA_STREAM_AUTO_TIMING_UPDATE);
+
+ if (r < 0)
+ goto fail;
+
+ pa_threaded_mainloop_unlock (g->mainloop);
+
+ return stream;
+
+fail:
+ pa_threaded_mainloop_unlock (g->mainloop);
+
+ if (stream)
+ pa_stream_unref (stream);
+
+ qpa_logerr (pa_context_errno (g->context),
+ "stream_new() failed\n");
+
+ return NULL;
+}
+
static int qpa_init_out (HWVoiceOut *hw, struct audsettings *as)
{
int error;
@@ -306,24 +523,24 @@ static int qpa_init_out (HWVoiceOut *hw, struct
audsettings *as)
obt_as.fmt = pa_to_audfmt (ss.format, &obt_as.endianness);
- pa->s = pa_simple_new (
- conf.server,
+ pa->stream = qpa_simple_new (
+ glob_paaudio.server,
"qemu",
PA_STREAM_PLAYBACK,
- conf.sink,
+ glob_paaudio.sink,
"pcm.playback",
&ss,
NULL, /* channel map */
&ba, /* buffering attributes */
&error
);
- if (!pa->s) {
+ 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 = conf.samples;
+ hw->samples = glob_paaudio.samples;
pa->pcm_buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift);
pa->rpos = hw->rpos;
if (!pa->pcm_buf) {
@@ -342,8 +559,9 @@ static int qpa_init_out (HWVoiceOut *hw, struct audsettings
*as)
g_free (pa->pcm_buf);
pa->pcm_buf = NULL;
fail2:
- pa_simple_free (pa->s);
- pa->s = NULL;
+ if (pa->stream)
+ pa_stream_unref (pa->stream);
+ pa->stream = NULL;
fail1:
return -1;
}
@@ -361,24 +579,24 @@ static int qpa_init_in (HWVoiceIn *hw, struct audsettings
*as)
obt_as.fmt = pa_to_audfmt (ss.format, &obt_as.endianness);
- pa->s = pa_simple_new (
- conf.server,
+ pa->stream = qpa_simple_new (
+ glob_paaudio.server,
"qemu",
PA_STREAM_RECORD,
- conf.source,
+ glob_paaudio.source,
"pcm.capture",
&ss,
NULL, /* channel map */
NULL, /* buffering attributes */
&error
);
- if (!pa->s) {
+ 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 = conf.samples;
+ hw->samples = glob_paaudio.samples;
pa->pcm_buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift);
pa->wpos = hw->wpos;
if (!pa->pcm_buf) {
@@ -397,8 +615,9 @@ static int qpa_init_in (HWVoiceIn *hw, struct audsettings
*as)
g_free (pa->pcm_buf);
pa->pcm_buf = NULL;
fail2:
- pa_simple_free (pa->s);
- pa->s = NULL;
+ if (pa->stream)
+ pa_stream_unref (pa->stream);
+ pa->stream = NULL;
fail1:
return -1;
}
@@ -413,9 +632,9 @@ static void qpa_fini_out (HWVoiceOut *hw)
audio_pt_unlock_and_signal (&pa->pt, AUDIO_FUNC);
audio_pt_join (&pa->pt, &ret, AUDIO_FUNC);
- if (pa->s) {
- pa_simple_free (pa->s);
- pa->s = NULL;
+ if (pa->stream) {
+ pa_stream_unref (pa->stream);
+ pa->stream = NULL;
}
audio_pt_fini (&pa->pt, AUDIO_FUNC);
@@ -433,9 +652,9 @@ static void qpa_fini_in (HWVoiceIn *hw)
audio_pt_unlock_and_signal (&pa->pt, AUDIO_FUNC);
audio_pt_join (&pa->pt, &ret, AUDIO_FUNC);
- if (pa->s) {
- pa_simple_free (pa->s);
- pa->s = NULL;
+ if (pa->stream) {
+ pa_stream_unref (pa->stream);
+ pa->stream = NULL;
}
audio_pt_fini (&pa->pt, AUDIO_FUNC);
@@ -460,37 +679,98 @@ static int qpa_ctl_in (HWVoiceIn *hw, int cmd, ...)
/* common */
static void *qpa_audio_init (void)
{
- return &conf;
+ paaudio *g = &glob_paaudio;
+
+ if (!(g->mainloop = pa_threaded_mainloop_new ()))
+ goto fail;
+
+ if (!(g->context = pa_context_new (pa_threaded_mainloop_get_api
(g->mainloop), glob_paaudio.server)))
+ goto fail;
+
+ pa_context_set_state_callback (g->context, context_state_cb, g);
+
+ if (pa_context_connect (g->context, glob_paaudio.server, 0, NULL) < 0) {
+ qpa_logerr (pa_context_errno (g->context),
+ "pa_context_connect() failed\n");
+ goto fail;
+ }
+
+ pa_threaded_mainloop_lock (g->mainloop);
+
+ if (pa_threaded_mainloop_start (g->mainloop) < 0)
+ goto unlock_and_fail;
+
+ for (;;) {
+ pa_context_state_t state;
+
+ state = pa_context_get_state (g->context);
+
+ if (state == PA_CONTEXT_READY)
+ break;
+
+ if (!PA_CONTEXT_IS_GOOD (state)) {
+ qpa_logerr (pa_context_errno (g->context),
+ "Wrong context state\n");
+ goto unlock_and_fail;
+ }
+
+ /* Wait until the context is ready */
+ pa_threaded_mainloop_wait (g->mainloop);
+ }
+
+ pa_threaded_mainloop_unlock (g->mainloop);
+
+ return &glob_paaudio;
+
+unlock_and_fail:
+ pa_threaded_mainloop_unlock (g->mainloop);
+fail:
+ AUD_log (AUDIO_CAP, "Failed to initialize PA context");
+ return NULL;
}
static void qpa_audio_fini (void *opaque)
{
- (void) opaque;
+ paaudio *g = opaque;
+
+ if (g->mainloop)
+ pa_threaded_mainloop_stop (g->mainloop);
+
+ if (g->context) {
+ pa_context_disconnect (g->context);
+ pa_context_unref (g->context);
+ g->context = NULL;
+ }
+
+ if (g->mainloop)
+ pa_threaded_mainloop_free (g->mainloop);
+
+ g->mainloop = NULL;
}
struct audio_option qpa_options[] = {
{
.name = "SAMPLES",
.tag = AUD_OPT_INT,
- .valp = &conf.samples,
+ .valp = &glob_paaudio.samples,
.descr = "buffer size in samples"
},
{
.name = "SERVER",
.tag = AUD_OPT_STR,
- .valp = &conf.server,
+ .valp = &glob_paaudio.server,
.descr = "server address"
},
{
.name = "SINK",
.tag = AUD_OPT_STR,
- .valp = &conf.sink,
+ .valp = &glob_paaudio.sink,
.descr = "sink device name"
},
{
.name = "SOURCE",
.tag = AUD_OPT_STR,
- .valp = &conf.source,
+ .valp = &glob_paaudio.source,
.descr = "source device name"
},
{ /* End of list */ }
--
1.7.7.6
