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pcm direct plugins: drain() call might be blocked when threads are used

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Add SETUP state checks and do modifications according latest ALSA driver
(passing wrong event identification).

ALSA bug#4914

Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Jaroslav Kysela 2010-03-03 10:58:53 +01:00
parent 7fd0d9f423
commit b9dbee694a
5 changed files with 20 additions and 14 deletions
Download patch file Download diff file Expand all files Collapse all files

21
src/pcm/pcm_direct.c
View file

@ -540,7 +540,6 @@ void snd_pcm_direct_clear_timer_queue(snd_pcm_direct_t *dmix)
int snd_pcm_direct_timer_stop(snd_pcm_direct_t *dmix)
{
snd_timer_stop(dmix->timer);
snd_pcm_direct_clear_timer_queue(dmix);
return 0;
}
@ -567,6 +566,7 @@ int snd_pcm_direct_poll_revents(snd_pcm_t *pcm, struct pollfd *pfds, unsigned in
switch (snd_pcm_state(dmix->spcm)) {
case SND_PCM_STATE_XRUN:
case SND_PCM_STATE_SUSPENDED:
case SND_PCM_STATE_SETUP:
events |= POLLERR;
break;
default:
@ -577,6 +577,7 @@ int snd_pcm_direct_poll_revents(snd_pcm_t *pcm, struct pollfd *pfds, unsigned in
switch (snd_pcm_state(pcm)) {
case SND_PCM_STATE_XRUN:
case SND_PCM_STATE_SUSPENDED:
case SND_PCM_STATE_SETUP:
events |= POLLERR;
break;
default:
@ -1126,8 +1127,9 @@ int snd_pcm_direct_initialize_poll_fd(snd_pcm_direct_t *dmix)
snd_timer_poll_descriptors(dmix->timer, &dmix->timer_fd, 1);
dmix->poll_fd = dmix->timer_fd.fd;
dmix->timer_event_suspend = 1<<SND_TIMER_EVENT_MSUSPEND;
dmix->timer_event_resume = 1<<SND_TIMER_EVENT_MRESUME;
dmix->timer_events = (1<<SND_TIMER_EVENT_MSUSPEND) |
(1<<SND_TIMER_EVENT_MRESUME) |
(1<<SND_TIMER_EVENT_STOP);
/*
* Some hacks for older kernel drivers
@ -1146,9 +1148,15 @@ int snd_pcm_direct_initialize_poll_fd(snd_pcm_direct_t *dmix)
* suspend/resume events.
*/
if (ver < SNDRV_PROTOCOL_VERSION(2, 0, 5)) {
dmix->timer_event_suspend = 1<<SND_TIMER_EVENT_MPAUSE;
dmix->timer_event_resume = 1<<SND_TIMER_EVENT_MCONTINUE;
dmix->timer_events &= ~((1<<SND_TIMER_EVENT_MSUSPEND) |
(1<<SND_TIMER_EVENT_MRESUME));
dmix->timer_events |= (1<<SND_TIMER_EVENT_MPAUSE) |
(1<<SND_TIMER_EVENT_MCONTINUE);
}
/* In older versions, use SND_TIMER_EVENT_START too.
*/
if (ver < SNDRV_PROTOCOL_VERSION(2, 0, 6))
dmix->timer_events |= 1<<SND_TIMER_EVENT_START;
}
return 0;
}
@ -1275,8 +1283,7 @@ int snd_pcm_direct_set_timer_params(snd_pcm_direct_t *dmix)
snd_timer_params_set_ticks(params, 1);
if (dmix->tread) {
filter = (1<<SND_TIMER_EVENT_TICK) |
dmix->timer_event_suspend |
dmix->timer_event_resume;
dmix->timer_events;
snd_timer_params_set_filter(params, filter);
}
ret = snd_timer_params(dmix->timer, params);

7
src/pcm/pcm_direct.h
View file

@ -142,10 +142,9 @@ struct snd_pcm_direct {
int hw_fd; /* hardware file descriptor */
struct pollfd timer_fd;
int poll_fd;
int tread;
int timer_need_poll;
unsigned int timer_event_suspend;
unsigned int timer_event_resume;
int tread: 1;
int timer_need_poll: 1;
unsigned int timer_events;
int server_fd;
pid_t server_pid;
snd_timer_t *timer; /* timer used as poll_fd */

2
src/pcm/pcm_dmix.c
View file

@ -605,8 +605,8 @@ static int snd_pcm_dmix_drop(snd_pcm_t *pcm)
snd_pcm_direct_t *dmix = pcm->private_data;
if (dmix->state == SND_PCM_STATE_OPEN)
return -EBADFD;
snd_pcm_direct_timer_stop(dmix);
dmix->state = SND_PCM_STATE_SETUP;
snd_pcm_direct_timer_stop(dmix);
return 0;
}

2
src/pcm/pcm_dshare.c
View file

@ -355,9 +355,9 @@ static int snd_pcm_dshare_drop(snd_pcm_t *pcm)
snd_pcm_direct_t *dshare = pcm->private_data;
if (dshare->state == SND_PCM_STATE_OPEN)
return -EBADFD;
dshare->state = SND_PCM_STATE_SETUP;
snd_pcm_direct_timer_stop(dshare);
do_silence(pcm);
dshare->state = SND_PCM_STATE_SETUP;
return 0;
}

2
src/pcm/pcm_dsnoop.c
View file

@ -280,8 +280,8 @@ static int snd_pcm_dsnoop_drop(snd_pcm_t *pcm)
snd_pcm_direct_t *dsnoop = pcm->private_data;
if (dsnoop->state == SND_PCM_STATE_OPEN)
return -EBADFD;
snd_timer_stop(dsnoop->timer);
dsnoop->state = SND_PCM_STATE_SETUP;
snd_timer_stop(dsnoop->timer);
return 0;
}