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Implemented snd_pcm_avail() function.

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More documentation updates for snd_pcm_avail_update() and snd_pcm_delay().
Updated behaviour of read/write functions (wait when buffer is full) to
follow kernel.
This commit is contained in:
Jaroslav Kysela 2002-10-11 18:39:24 +00:00
parent 25e41cf1e8
commit e859cf2644
11 changed files with 189 additions and 69 deletions
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33
src/pcm/pcm_share.c
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@ -713,12 +713,34 @@ static snd_pcm_state_t snd_pcm_share_state(snd_pcm_t *pcm)
return share->state;
}
static int _snd_pcm_share_avail(snd_pcm_t *pcm, snd_pcm_uframes_t *availp)
{
snd_pcm_share_t *share = pcm->private_data;
snd_pcm_share_slave_t *slave = share->slave;
switch (share->state) {
case SND_PCM_STATE_XRUN:
return -EPIPE;
default:
break;
}
return snd_pcm_avail(slave->pcm, availp);
}
static int snd_pcm_share_avail(snd_pcm_t *pcm, snd_pcm_uframes_t *availp)
{
snd_pcm_share_t *share = pcm->private_data;
snd_pcm_share_slave_t *slave = share->slave;
int err;
Pthread_mutex_lock(&slave->mutex);
err = _snd_pcm_share_avail(pcm, availp);
Pthread_mutex_unlock(&slave->mutex);
return err;
}
static int _snd_pcm_share_delay(snd_pcm_t *pcm, snd_pcm_sframes_t *delayp)
{
snd_pcm_share_t *share = pcm->private_data;
snd_pcm_share_slave_t *slave = share->slave;
int err = 0;
snd_pcm_sframes_t sd;
switch (share->state) {
case SND_PCM_STATE_XRUN:
return -EPIPE;
@ -731,11 +753,7 @@ static int _snd_pcm_share_delay(snd_pcm_t *pcm, snd_pcm_sframes_t *delayp)
default:
return -EBADFD;
}
err = snd_pcm_delay(slave->pcm, &sd);
if (err < 0)
return err;
*delayp = sd + snd_pcm_mmap_delay(pcm);
return 0;
return snd_pcm_delay(slave->pcm, delayp);
}
static int snd_pcm_share_delay(snd_pcm_t *pcm, snd_pcm_sframes_t *delayp)
@ -1215,6 +1233,7 @@ static snd_pcm_ops_t snd_pcm_share_ops = {
static snd_pcm_fast_ops_t snd_pcm_share_fast_ops = {
status: snd_pcm_share_status,
state: snd_pcm_share_state,
avail: snd_pcm_share_avail,
delay: snd_pcm_share_delay,
prepare: snd_pcm_share_prepare,
reset: snd_pcm_share_reset,