Like the change done for dshare plugin, we can calculate the delay more precisely from the slave PCM.
Signed-off-by: Takashi Iwai tiwai@suse.de --- src/pcm/pcm_dmix.c | 45 ++++++++++++++++++++++++++++----------------- 1 file changed, 28 insertions(+), 17 deletions(-)
diff --git a/src/pcm/pcm_dmix.c b/src/pcm/pcm_dmix.c index 2fedb1c14a3b..825677ffeb3f 100644 --- a/src/pcm/pcm_dmix.c +++ b/src/pcm/pcm_dmix.c @@ -391,23 +391,14 @@ static void snd_pcm_dmix_sync_area(snd_pcm_t *pcm) /* * synchronize hardware pointer (hw_ptr) with ours */ -static int snd_pcm_dmix_sync_ptr(snd_pcm_t *pcm) +static int snd_pcm_dmix_sync_ptr0(snd_pcm_t *pcm, snd_pcm_uframes_t slave_hw_ptr) { snd_pcm_direct_t *dmix = pcm->private_data; - snd_pcm_uframes_t slave_hw_ptr, old_slave_hw_ptr, avail; + snd_pcm_uframes_t old_slave_hw_ptr, avail; snd_pcm_sframes_t diff; - switch (snd_pcm_state(dmix->spcm)) { - case SND_PCM_STATE_DISCONNECTED: - dmix->state = SND_PCM_STATE_DISCONNECTED; - return -ENODEV; - default: - break; - } - if (dmix->slowptr) - snd_pcm_hwsync(dmix->spcm); old_slave_hw_ptr = dmix->slave_hw_ptr; - slave_hw_ptr = dmix->slave_hw_ptr = *dmix->spcm->hw.ptr; + dmix->slave_hw_ptr = *dmix->spcm->hw.ptr; diff = slave_hw_ptr - old_slave_hw_ptr; if (diff == 0) /* fast path */ return 0; @@ -440,6 +431,24 @@ static int snd_pcm_dmix_sync_ptr(snd_pcm_t *pcm) return 0; }
+static int snd_pcm_dmix_sync_ptr(snd_pcm_t *pcm) +{ + snd_pcm_direct_t *dmix = pcm->private_data; + + switch (snd_pcm_state(dmix->spcm)) { + case SND_PCM_STATE_DISCONNECTED: + dmix->state = SND_PCM_STATE_DISCONNECTED; + return -ENODEV; + default: + break; + } + + if (dmix->slowptr) + snd_pcm_hwsync(dmix->spcm); + + return snd_pcm_dmix_sync_ptr0(pcm, *dmix->spcm->hw.ptr); +} + /* * plugin implementation */ @@ -467,22 +476,24 @@ static int snd_pcm_dmix_status(snd_pcm_t *pcm, snd_pcm_status_t * status) { snd_pcm_direct_t *dmix = pcm->private_data;
+ memset(status, 0, sizeof(*status)); + snd_pcm_status(dmix->spcm, status); + switch (dmix->state) { case SNDRV_PCM_STATE_DRAINING: case SNDRV_PCM_STATE_RUNNING: - snd_pcm_dmix_sync_ptr(pcm); + snd_pcm_dmix_sync_ptr0(pcm, status->hw_ptr); + status->delay += snd_pcm_mmap_playback_delay(pcm) + + status->avail - dmix->spcm->buffer_size; break; default: break; } - memset(status, 0, sizeof(*status)); - snd_pcm_status(dmix->spcm, status); - status->state = snd_pcm_dmix_state(pcm); + status->trigger_tstamp = dmix->trigger_tstamp; status->avail = snd_pcm_mmap_playback_avail(pcm); status->avail_max = status->avail > dmix->avail_max ? status->avail : dmix->avail_max; dmix->avail_max = 0; - status->delay = snd_pcm_mmap_playback_delay(pcm); return 0; }