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alsa: use absolute timers

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Use absolute timers, together with the alsa timestamp they are
potentially more accurate.
fix some crashes
This commit is contained in:
Wim Taymans 2017-03-29 16:39:24 +02:00
parent 46928cbc04
commit 3f8123143d
2 changed files with 27 additions and 11 deletions
Download patch file Download diff file Expand all files Collapse all files

7
pinos/client/context.c
View file

@ -378,7 +378,8 @@ do_flush_event (SpaSource *source,
void *data)
{
PinosContextImpl *impl = data;
pinos_connection_flush (impl->connection);
if (impl->connection)
pinos_connection_flush (impl->connection);
}
static void
@ -514,6 +515,8 @@ pinos_context_destroy (PinosContext *context)
pinos_log_debug ("context %p: destroy", context);
pinos_signal_emit (&context->destroy_signal, context);
pinos_loop_destroy_source (impl->this.loop, impl->flush_event);
if (context->state != PINOS_CONTEXT_STATE_UNCONNECTED)
pinos_context_disconnect (context);
@ -524,8 +527,6 @@ pinos_context_destroy (PinosContext *context)
pinos_map_clear (&context->objects);
pinos_loop_destroy_source (impl->this.loop, impl->flush_event);
free (context->name);
if (context->properties)
pinos_properties_free (context->properties);

31
spa/plugins/alsa/alsa-utils.c
View file

@ -626,17 +626,19 @@ static inline void
calc_timeout (size_t frames,
size_t cb_threshold,
size_t rate,
snd_htimestamp_t *now,
struct timespec *ts)
{
size_t to_play_usec;
ts->tv_sec = 0;
ts->tv_sec = now->tv_sec;
/* adjust sleep time to target our callback threshold */
if (frames > cb_threshold)
to_play_usec = (frames - cb_threshold) * 1000000 / rate;
else
to_play_usec = 0;
ts->tv_nsec = to_play_usec * 1000 + 1;
ts->tv_nsec = to_play_usec * 1000 + now->tv_nsec;
while (ts->tv_nsec > 1000000000L) {
ts->tv_sec++;
@ -651,22 +653,34 @@ alsa_on_timeout_event (SpaSource *source)
int res;
SpaALSAState *state = source->data;
snd_pcm_t *hndl = state->hndl;
snd_pcm_sframes_t avail;
snd_pcm_sframes_t avail, delay;
struct itimerspec ts;
snd_pcm_uframes_t total_written = 0, filled;
const snd_pcm_channel_area_t *my_areas;
snd_pcm_status_t *status;
snd_htimestamp_t htstamp;
read (state->timerfd, &exp, sizeof (uint64_t));
if ((avail = snd_pcm_avail (hndl)) < 0) {
spa_log_error (state->log, "snd_pcm_avail_update error: %s", snd_strerror (avail));
snd_pcm_status_alloca(&status);
if ((res = snd_pcm_status (hndl, status)) < 0) {
spa_log_error (state->log, "snd_pcm_status error: %s", snd_strerror (res));
return;
}
avail = snd_pcm_status_get_avail (status);
delay = snd_pcm_status_get_delay (status);
snd_pcm_status_get_htstamp (status, &htstamp);
state->last_ticks = state->sample_count - delay;
state->last_monotonic = (int64_t)htstamp.tv_sec * SPA_NSEC_PER_SEC + (int64_t)htstamp.tv_nsec;
if (avail > state->buffer_frames)
avail = state->buffer_frames;
filled = state->buffer_frames - avail;
if (filled > state->threshold) {
if (filled > state->threshold + 10) {
if (snd_pcm_state (hndl) == SND_PCM_STATE_SUSPENDED) {
spa_log_error (state->log, "suspended: try resume");
if ((res = alsa_try_resume (state)) < 0)
@ -700,6 +714,7 @@ alsa_on_timeout_event (SpaSource *source)
}
total_written += written;
}
state->sample_count += total_written;
}
if (!state->alsa_started && total_written > 0) {
spa_log_trace (state->log, "snd_pcm_start");
@ -710,13 +725,13 @@ alsa_on_timeout_event (SpaSource *source)
state->alsa_started = true;
}
calc_timeout (total_written + filled, state->threshold, state->rate, &ts.it_value);
calc_timeout (total_written + filled, state->threshold, state->rate, &htstamp, &ts.it_value);
// printf ("timeout %ld %ld %ld %ld\n", total_written, filled, ts.it_value.tv_sec, ts.it_value.tv_nsec);
ts.it_interval.tv_sec = 0;
ts.it_interval.tv_nsec = 0;
timerfd_settime (state->timerfd, 0, &ts, NULL);
timerfd_settime (state->timerfd, TFD_TIMER_ABSTIME, &ts, NULL);
}
SpaResult