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alsaloop: Delay the restart a bit (to handle snd-aloop playback xruns better)

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Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Jaroslav Kysela 2010-10-20 09:26:24 +02:00
parent b67d215d20
commit d53eb0309d
2 changed files with 28 additions and 7 deletions
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2
alsaloop/alsaloop.h
View file

@ -143,6 +143,8 @@ struct loopback {
unsigned int linked:1; /* linked streams */
unsigned int reinit:1;
unsigned int running:1;
unsigned int stop_pending:1;
snd_pcm_uframes_t stop_count;
sync_type_t sync; /* type of sync */
slave_type_t slave;
int thread; /* thread number */

33
alsaloop/pcmjob.c
View file

@ -738,6 +738,15 @@ static int writeit(struct loopback_handle *lhandle)
lhandle->buf_pos += r;
lhandle->buf_pos %= lhandle->buf_size;
xrun_profile(lhandle->loopback);
if (lhandle->loopback->stop_pending) {
lhandle->loopback->stop_count += r;
if (lhandle->loopback->stop_count * lhandle->pitch >
lhandle->loopback->latency * 3) {
lhandle->loopback->stop_pending = 0;
lhandle->loopback->reinit = 1;
break;
}
}
}
return res;
}
@ -1521,6 +1530,7 @@ int pcmjob_start(struct loopback *loop)
goto __error;
}
loop->running = 1;
loop->stop_pending = 0;
if (loop->xrun) {
getcurtimestamp(&loop->xrun_last_update);
loop->xrun_last_pdelay = XRUN_PROFILE_UNKNOWN;
@ -1638,6 +1648,7 @@ static int ctl_event_check(snd_ctl_elem_value_t *val, snd_ctl_event_t *ev)
static int handle_ctl_events(struct loopback_handle *lhandle,
unsigned short events)
{
struct loopback *loop = lhandle->loopback;
snd_ctl_event_t *ev;
int err;
@ -1647,16 +1658,24 @@ static int handle_ctl_events(struct loopback_handle *lhandle,
break;
if (snd_ctl_event_get_type(ev) != SND_CTL_EVENT_ELEM)
continue;
if (lhandle == lhandle->loopback->play)
if (lhandle == loop->play)
goto __ctl_check;
if (verbose > 6)
snd_output_printf(lhandle->loopback->output, "%s: ctl event!!!! %s\n", lhandle->id, snd_ctl_event_elem_get_name(ev));
snd_output_printf(loop->output, "%s: ctl event!!!! %s\n", lhandle->id, snd_ctl_event_elem_get_name(ev));
if (ctl_event_check(lhandle->ctl_active, ev)) {
err = get_active(lhandle);
if (verbose > 7)
snd_output_printf(lhandle->loopback->output, "%s: ctl event active %i\n", lhandle->id, err);
if (err != lhandle->loopback->running)
goto __restart;
snd_output_printf(loop->output, "%s: ctl event active %i\n", lhandle->id, err);
if (!err) {
if (lhandle->loopback->running) {
loop->stop_pending = 1;
loop->stop_count = 0;
}
} else {
loop->stop_pending = 0;
if (loop->running == 0)
goto __restart;
}
} else if (ctl_event_check(lhandle->ctl_format, ev)) {
err = get_format(lhandle);
if (lhandle->format != err)
@ -1676,8 +1695,8 @@ static int handle_ctl_events(struct loopback_handle *lhandle,
return 0;
__restart:
pcmjob_stop(lhandle->loopback);
err = pcmjob_start(lhandle->loopback);
pcmjob_stop(loop);
err = pcmjob_start(loop);
if (err < 0)
return err;
return 1;