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pcm: multi plugin - fix wait_for_avail_min

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All slaves should be asked to wait otherwise the write loop might
be interrupted and zero frames might be returned.

Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Jaroslav Kysela 2019-03-25 16:15:07 +01:00
parent 0d92f2d39a
commit 4694a6643d
1 changed files with 7 additions and 3 deletions
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10
src/pcm/pcm_multi.c
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@ -775,11 +775,15 @@ static int snd_pcm_multi_mmap(snd_pcm_t *pcm)
return 0;
}
static int snd_pcm_multi_may_wait_for_avail_min(snd_pcm_t *pcm, snd_pcm_uframes_t avail ATTRIBUTE_UNUSED)
static int snd_pcm_multi_may_wait_for_avail_min(snd_pcm_t *pcm, snd_pcm_uframes_t avail)
{
snd_pcm_multi_t *multi = pcm->private_data;
snd_pcm_t *slave = multi->slaves[multi->master_slave].pcm;
return snd_pcm_may_wait_for_avail_min(slave, snd_pcm_mmap_avail(slave));
unsigned int i;
for (i = 0; i < multi->slaves_count; ++i) {
if (snd_pcm_may_wait_for_avail_min(multi->slaves[i].pcm, avail))
return 1;
}
return 0;
}
static snd_pcm_chmap_query_t **snd_pcm_multi_query_chmaps(snd_pcm_t *pcm)