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pcm: multi: implement rewindable and forwardable callbacks

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Signed-off-by: Alexander E. Patrakov <patrakov@gmail.com>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Alexander E. Patrakov 2014-06-12 16:34:23 +06:00 • committed by Jaroslav Kysela
parent 68ae0c72a5
commit fb73f310f8
1 changed files with 38 additions and 0 deletions
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38
src/pcm/pcm_multi.c
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@ -555,6 +555,42 @@ static int snd_pcm_multi_channel_info(snd_pcm_t *pcm, snd_pcm_channel_info_t *in
return err;
}
static snd_pcm_sframes_t snd_pcm_multi_rewindable(snd_pcm_t *pcm)
{
snd_pcm_multi_t *multi = pcm->private_data;
unsigned int i;
snd_pcm_sframes_t frames = LONG_MAX;
for (i = 0; i < multi->slaves_count; ++i) {
snd_pcm_sframes_t f = snd_pcm_rewindable(multi->slaves[i].pcm);
if (f <= 0)
return f;
if (f < frames)
frames = f;
}
return frames;
}
static snd_pcm_sframes_t snd_pcm_multi_forwardable(snd_pcm_t *pcm)
{
snd_pcm_multi_t *multi = pcm->private_data;
unsigned int i;
snd_pcm_sframes_t frames = LONG_MAX;
for (i = 0; i < multi->slaves_count; ++i) {
snd_pcm_sframes_t f = snd_pcm_forwardable(multi->slaves[i].pcm);
if (f <= 0)
return f;
if (f < frames)
frames = f;
}
return frames;
}
static snd_pcm_sframes_t snd_pcm_multi_rewind(snd_pcm_t *pcm, snd_pcm_uframes_t frames)
{
snd_pcm_multi_t *multi = pcm->private_data;
@ -932,7 +968,9 @@ static const snd_pcm_fast_ops_t snd_pcm_multi_fast_ops = {
.writen = snd_pcm_mmap_writen,
.readi = snd_pcm_mmap_readi,
.readn = snd_pcm_mmap_readn,
.rewindable = snd_pcm_multi_rewindable,
.rewind = snd_pcm_multi_rewind,
.forwardable = snd_pcm_multi_forwardable,
.forward = snd_pcm_multi_forward,
.resume = snd_pcm_multi_resume,
.link = snd_pcm_multi_link,