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use the new latency update callback to be notified when latency data becomes

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available again after PA_ERR_NODATA is returned by pa_stream_get_latency()


git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@876 fefdeb5f-60dc-0310-8127-8f9354f1896f
This commit is contained in:
Lennart Poettering 2006-05-16 00:06:02 +00:00
parent 724cd9d811
commit 23e74545ad
1 changed files with 21 additions and 4 deletions
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23
src/polyp/simple.c
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@ -125,6 +125,14 @@ static void stream_request_cb(pa_stream *s, size_t length, void *userdata) {
pa_threaded_mainloop_signal(p->mainloop, 0); pa_threaded_mainloop_signal(p->mainloop, 0);
} }
static void stream_latency_update_cb(pa_stream *s, void *userdata) {
pa_simple *p = userdata;
assert(p);
pa_threaded_mainloop_signal(p->mainloop, 0);
}
pa_simple* pa_simple_new( pa_simple* pa_simple_new(
const char *server, const char *server,
const char *name, const char *name,
@ -184,6 +192,7 @@ pa_simple* pa_simple_new(
pa_stream_set_state_callback(p->stream, stream_state_cb, p); pa_stream_set_state_callback(p->stream, stream_state_cb, p);
pa_stream_set_read_callback(p->stream, stream_request_cb, p); pa_stream_set_read_callback(p->stream, stream_request_cb, p);
pa_stream_set_write_callback(p->stream, stream_request_cb, p); pa_stream_set_write_callback(p->stream, stream_request_cb, p);
pa_stream_set_latency_update_callback(p->stream, stream_latency_update_cb, p);
if (dir == PA_STREAM_PLAYBACK) if (dir == PA_STREAM_PLAYBACK)
r = pa_stream_connect_playback(p->stream, dev, attr, PA_STREAM_INTERPOLATE_TIMING|PA_STREAM_AUTO_TIMING_UPDATE, NULL, NULL); r = pa_stream_connect_playback(p->stream, dev, attr, PA_STREAM_INTERPOLATE_TIMING|PA_STREAM_AUTO_TIMING_UPDATE, NULL, NULL);
@ -414,17 +423,25 @@ unlock_and_fail:
pa_usec_t pa_simple_get_playback_latency(pa_simple *p, int *rerror) { pa_usec_t pa_simple_get_playback_latency(pa_simple *p, int *rerror) {
pa_usec_t t; pa_usec_t t;
int r, negative; int negative;
assert(p); assert(p);
CHECK_VALIDITY_RETURN_ANY(rerror, p->direction == PA_STREAM_PLAYBACK, PA_ERR_BADSTATE, (pa_usec_t) -1); CHECK_VALIDITY_RETURN_ANY(rerror, p->direction == PA_STREAM_PLAYBACK, PA_ERR_BADSTATE, (pa_usec_t) -1);
pa_threaded_mainloop_lock(p->mainloop); pa_threaded_mainloop_lock(p->mainloop);
for (;;) {
CHECK_DEAD_GOTO(p, rerror, unlock_and_fail); CHECK_DEAD_GOTO(p, rerror, unlock_and_fail);
r = pa_stream_get_latency(p->stream, &t, &negative); if (pa_stream_get_latency(p->stream, &t, &negative) >= 0)
CHECK_SUCCESS_GOTO(p, rerror, r >= 0, unlock_and_fail); break;
CHECK_SUCCESS_GOTO(p, rerror, pa_context_errno(p->context) == PA_ERR_NODATA, unlock_and_fail);
/* Wait until latency data is available again */
pa_threaded_mainloop_wait(p->mainloop);
}
pa_threaded_mainloop_unlock(p->mainloop); pa_threaded_mainloop_unlock(p->mainloop);