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Impemented snd_pcm_htimestamp() function.

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This commit is contained in:
Jaroslav Kysela 2008-01-09 13:50:45 +01:00
parent 309a274454
commit 2c1318803f
19 changed files with 182 additions and 14 deletions
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21
src/pcm/pcm_hw.c
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@ -846,6 +846,26 @@ static snd_pcm_sframes_t snd_pcm_hw_avail_update(snd_pcm_t *pcm)
return avail;
}
static int snd_pcm_hw_htimestamp(snd_pcm_t *pcm, snd_pcm_uframes_t *avail,
snd_htimestamp_t *tstamp)
{
snd_pcm_sframes_t avail1;
int ok = 0;
/* unfortunately, loop is necessary to ensure valid timestamp */
while (1) {
avail1 = snd_pcm_hw_avail_update(pcm);
if (avail1 < 0)
return avail1;
if (ok && (snd_pcm_uframes_t)avail1 == *avail)
break;
*avail = avail1;
*tstamp = snd_pcm_hw_fast_tstamp(pcm);
ok = 1;
}
return 0;
}
static void snd_pcm_hw_dump(snd_pcm_t *pcm, snd_output_t *out)
{
snd_pcm_hw_t *hw = pcm->private_data;
@ -902,6 +922,7 @@ static snd_pcm_fast_ops_t snd_pcm_hw_fast_ops = {
.readn = snd_pcm_hw_readn,
.avail_update = snd_pcm_hw_avail_update,
.mmap_commit = snd_pcm_hw_mmap_commit,
.htimestamp = snd_pcm_hw_htimestamp,
.poll_descriptors = NULL,
.poll_descriptors_count = NULL,
.poll_revents = NULL,