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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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24
src/pcm/pcm_local.h
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@ -144,6 +144,7 @@ typedef struct {
int (*drain)(snd_pcm_t *pcm);
int (*pause)(snd_pcm_t *pcm, int enable);
snd_pcm_state_t (*state)(snd_pcm_t *pcm);
int (*avail)(snd_pcm_t *pcm, snd_pcm_uframes_t *availp);
int (*delay)(snd_pcm_t *pcm, snd_pcm_sframes_t *delayp);
int (*resume)(snd_pcm_t *pcm);
snd_pcm_sframes_t (*rewind)(snd_pcm_t *pcm, snd_pcm_uframes_t frames);
@ -323,31 +324,12 @@ static inline snd_pcm_uframes_t snd_pcm_mmap_hw_offset(snd_pcm_t *pcm)
static inline snd_pcm_uframes_t snd_pcm_mmap_playback_delay(snd_pcm_t *pcm)
{
snd_pcm_state_t state = snd_pcm_state(pcm);
switch (state) {
case SND_PCM_STATE_RUNNING:
case SND_PCM_STATE_DRAINING:
return snd_pcm_mmap_playback_hw_avail(pcm);
case SND_PCM_STATE_XRUN:
return -EPIPE;
default:
return -EBADFD;
}
return snd_pcm_mmap_playback_hw_avail(pcm);
}
static inline snd_pcm_uframes_t snd_pcm_mmap_capture_delay(snd_pcm_t *pcm)
{
snd_pcm_state_t state = snd_pcm_state(pcm);
switch (state) {
case SND_PCM_STATE_RUNNING:
return snd_pcm_mmap_capture_hw_avail(pcm);
case SND_PCM_STATE_XRUN:
return -EPIPE;
default:
return -EBADFD;
}
return snd_pcm_mmap_capture_hw_avail(pcm);
}
static inline snd_pcm_sframes_t snd_pcm_mmap_delay(snd_pcm_t *pcm)