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pcm direct plugins: change timestamping in dsnoop

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Do not use own timestamps, try to sync hw.ptr with real timestamp.

Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Jaroslav Kysela 2010-10-29 17:36:41 +02:00
parent 5cfa03d2f3
commit 13b5d972d2
4 changed files with 28 additions and 8 deletions
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1
src/pcm/pcm_direct.h
View file

@ -137,6 +137,7 @@ struct snd_pcm_direct {
int (*sync_ptr)(snd_pcm_t *pcm);
snd_pcm_state_t state;
snd_htimestamp_t trigger_tstamp;
snd_htimestamp_t update_tstamp;
int server, client;
int comm_fd; /* communication file descriptor (socket) */
int hw_fd; /* hardware file descriptor */

2
src/pcm/pcm_dmix.c
View file

@ -852,7 +852,7 @@ static int snd_pcm_dmix_htimestamp(snd_pcm_t *pcm,
if (ok && *avail == avail1)
break;
*avail = avail1;
*tstamp = snd_pcm_hw_fast_tstamp(pcm);
*tstamp = snd_pcm_hw_fast_tstamp(dmix->spcm);
}
return 0;
}

2
src/pcm/pcm_dshare.c
View file

@ -542,7 +542,7 @@ static int snd_pcm_dshare_htimestamp(snd_pcm_t *pcm,
if (ok && *avail == avail1)
break;
*avail = avail1;
*tstamp = snd_pcm_hw_fast_tstamp(pcm);
*tstamp = snd_pcm_hw_fast_tstamp(dshare->spcm);
}
return 0;
}

31
src/pcm/pcm_dsnoop.c
View file

@ -54,6 +54,23 @@ const char *_snd_module_pcm_dsnoop = "";
*
*/
static int snoop_timestamp(snd_pcm_t *pcm)
{
snd_pcm_direct_t *dsnoop = pcm->private_data;
snd_pcm_uframes_t ptr1 = -2LL /* invalid value */, ptr2;
/* loop is required to sync hw.ptr with timestamp */
while (1) {
ptr2 = *dsnoop->spcm->hw.ptr;
if (ptr1 == ptr2)
break;
ptr1 = ptr2;
dsnoop->update_tstamp = snd_pcm_hw_fast_tstamp(dsnoop->spcm);
}
dsnoop->slave_hw_ptr = ptr1;
return 0;
}
static void snoop_areas(snd_pcm_direct_t *dsnoop,
const snd_pcm_channel_area_t *src_areas,
const snd_pcm_channel_area_t *dst_areas,
@ -126,7 +143,8 @@ static int snd_pcm_dsnoop_sync_ptr(snd_pcm_t *pcm)
if (dsnoop->slowptr)
snd_pcm_hwsync(dsnoop->spcm);
old_slave_hw_ptr = dsnoop->slave_hw_ptr;
slave_hw_ptr = dsnoop->slave_hw_ptr = *dsnoop->spcm->hw.ptr;
snoop_timestamp(pcm);
slave_hw_ptr = dsnoop->slave_hw_ptr;
diff = slave_hw_ptr - old_slave_hw_ptr;
if (diff == 0) /* fast path */
return 0;
@ -172,7 +190,7 @@ static int snd_pcm_dsnoop_status(snd_pcm_t *pcm, snd_pcm_status_t * status)
state = snd_pcm_state(dsnoop->spcm);
status->state = state == SND_PCM_STATE_RUNNING ? dsnoop->state : state;
status->trigger_tstamp = dsnoop->trigger_tstamp;
gettimestamp(&status->tstamp, pcm->monotonic);
status->tstamp = dsnoop->update_tstamp;
status->avail = snd_pcm_mmap_capture_avail(pcm);
status->avail_max = status->avail > dsnoop->avail_max ? status->avail : dsnoop->avail_max;
dsnoop->avail_max = 0;
@ -254,7 +272,7 @@ static int snd_pcm_dsnoop_reset(snd_pcm_t *pcm)
snd_pcm_direct_t *dsnoop = pcm->private_data;
dsnoop->hw_ptr %= pcm->period_size;
dsnoop->appl_ptr = dsnoop->hw_ptr;
dsnoop->slave_appl_ptr = dsnoop->slave_hw_ptr = *dsnoop->spcm->hw.ptr;
dsnoop->slave_appl_ptr = dsnoop->slave_hw_ptr;
return 0;
}
@ -266,12 +284,13 @@ static int snd_pcm_dsnoop_start(snd_pcm_t *pcm)
if (dsnoop->state != SND_PCM_STATE_PREPARED)
return -EBADFD;
snd_pcm_hwsync(dsnoop->spcm);
dsnoop->slave_appl_ptr = dsnoop->slave_hw_ptr = *dsnoop->spcm->hw.ptr;
snoop_timestamp(pcm);
dsnoop->slave_appl_ptr = dsnoop->slave_hw_ptr;
err = snd_timer_start(dsnoop->timer);
if (err < 0)
return err;
dsnoop->state = SND_PCM_STATE_RUNNING;
gettimestamp(&dsnoop->trigger_tstamp, pcm->monotonic);
dsnoop->trigger_tstamp = dsnoop->update_tstamp;
return 0;
}
@ -437,7 +456,7 @@ static int snd_pcm_dsnoop_htimestamp(snd_pcm_t *pcm,
if (ok && *avail == avail1)
break;
*avail = avail1;
*tstamp = snd_pcm_hw_fast_tstamp(pcm);
*tstamp = snd_pcm_hw_fast_tstamp(dsnoop->spcm);
}
return 0;
}