static int snd_pcm_dshare_delay(snd_pcm_t *pcm, snd_pcm_sframes_t *delayp)
{
snd_pcm_direct_t *dshare = pcm->private_data;
int err;
switch (dshare->state) {
case SNDRV_PCM_STATE_DRAINING:
case SNDRV_PCM_STATE_RUNNING:
err = snd_pcm_dshare_sync_ptr(pcm);
if (err < 0)
return err;
/* fallthru */
case SNDRV_PCM_STATE_PREPARED:
case SNDRV_PCM_STATE_SUSPENDED:
case STATE_RUN_PENDING:
*delayp = snd_pcm_mmap_playback_hw_avail(pcm);
return 0;
case SNDRV_PCM_STATE_XRUN:
return -EPIPE;
case SNDRV_PCM_STATE_DISCONNECTED:
return -ENODEV;
default:
return -EBADFD;
}
}
/* locked version */
static int __snd_pcm_dshare_drain(snd_pcm_t *pcm)
{
snd_pcm_direct_t *dshare = pcm->private_data;
snd_pcm_uframes_t stop_threshold;
int err;
switch (snd_pcm_state(dshare->spcm)) {
case SND_PCM_STATE_SUSPENDED:
return -ESTRPIPE;
default:
break;
}
if (dshare->state == SND_PCM_STATE_OPEN)
return -EBADFD;
if (pcm->mode & SND_PCM_NONBLOCK)
return -EAGAIN;
if (dshare->state == SND_PCM_STATE_PREPARED) {
if (snd_pcm_mmap_playback_hw_avail(pcm) > 0)
snd_pcm_dshare_start(pcm);
else {
snd_pcm_dshare_drop(pcm);
return 0;
}
}
if (dshare->state == SND_PCM_STATE_XRUN) {
snd_pcm_dshare_drop(pcm);
return 0;
}
stop_threshold = pcm->stop_threshold;
if (pcm->stop_threshold > pcm->buffer_size)
pcm->stop_threshold = pcm->buffer_size;
dshare->state = SND_PCM_STATE_DRAINING;
do {
err = snd_pcm_dshare_sync_ptr(pcm);
if (err < 0) {
snd_pcm_dshare_drop(pcm);
break;
}
if (dshare->state == SND_PCM_STATE_DRAINING) {
snd_pcm_dshare_sync_area(pcm);
snd_pcm_wait_nocheck(pcm, -1);
snd_pcm_direct_clear_timer_queue(dshare); /* force poll to wait */
switch (snd_pcm_state(dshare->spcm)) {
case SND_PCM_STATE_SUSPENDED:
return -ESTRPIPE;
default:
break;
}
}
} while (dshare->state == SND_PCM_STATE_DRAINING);
pcm->stop_threshold = stop_threshold;
return 0;
}
static int snd_pcm_dshare_hwsync(snd_pcm_t *pcm)
{
snd_pcm_direct_t *dshare = pcm->private_data;
switch(dshare->state) {
case SNDRV_PCM_STATE_DRAINING:
case SNDRV_PCM_STATE_RUNNING:
return snd_pcm_dshare_sync_ptr(pcm);
case SNDRV_PCM_STATE_PREPARED:
case SNDRV_PCM_STATE_SUSPENDED:
return 0;
case SNDRV_PCM_STATE_XRUN:
return -EPIPE;
case SNDRV_PCM_STATE_DISCONNECTED:
return -ENODEV;
default:
return -EBADFD;
}
}
static int snd_pcm_dshare_status(snd_pcm_t *pcm, snd_pcm_status_t * status)
{
snd_pcm_direct_t *dshare = pcm->private_data;
switch (dshare->state) {
case SNDRV_PCM_STATE_DRAINING:
case SNDRV_PCM_STATE_RUNNING:
snd_pcm_dshare_sync_ptr(pcm);
break;
default:
break;
}
memset(status, 0, sizeof(*status));
status->state = snd_pcm_state(dshare->spcm);
status->trigger_tstamp = dshare->trigger_tstamp;
status->tstamp = snd_pcm_hw_fast_tstamp(dshare->spcm);
status->avail = snd_pcm_mmap_playback_avail(pcm);
status->avail_max = status->avail > dshare->avail_max ? status->avail : dshare->avail_max;
dshare->avail_max = 0;
return 0;
}
