On Thu, 17 Nov 2016 16:24:23 +0100, Alan Young wrote:
Similar to recent dshare patch.
Looks good, but please give your sign-off like the previous one. Also, keep maintainers to Cc.
thanks,
Takashi
From da687e77261f5cdd3c4b373156fb68ed83d98a26 Mon Sep 17 00:00:00 2001
From: Alan Young consult.awy@gmail.com Date: Tue, 14 Jun 2016 10:15:01 +0100 Subject: [PATCH] pcm_rate: Do not discard slave reported delay in status result.
snd_pcm_rate_status() gets the underlying status from the slave PCM. This may contain a delay value that includes elements such as codec and other transfer delays. Use this as the base for the returned delay value, adjusted for any frames buffered locally (within the rate plugin).
Also update snd_pcm_rate_delay() similarly.
src/pcm/pcm_rate.c | 46 ++++++++++++++++++++++++++++++++++++++++------ 1 file changed, 40 insertions(+), 6 deletions(-)
diff --git a/src/pcm/pcm_rate.c b/src/pcm/pcm_rate.c index 6184def..15383ae 100644 --- a/src/pcm/pcm_rate.c +++ b/src/pcm/pcm_rate.c @@ -559,10 +559,9 @@ snd_pcm_rate_read_areas1(snd_pcm_t *pcm, pcm->channels, rate); }
-static inline void snd_pcm_rate_sync_hwptr(snd_pcm_t *pcm) +static inline void snd_pcm_rate_sync_hwptr0(snd_pcm_t *pcm, snd_pcm_uframes_t slave_hw_ptr) { snd_pcm_rate_t *rate = pcm->private_data;
snd_pcm_uframes_t slave_hw_ptr = *rate->gen.slave->hw.ptr;
if (pcm->stream != SND_PCM_STREAM_PLAYBACK) return;
@@ -576,6 +575,12 @@ static inline void snd_pcm_rate_sync_hwptr(snd_pcm_t *pcm) rate->hw_ptr %= pcm->boundary; }
+static inline void snd_pcm_rate_sync_hwptr(snd_pcm_t *pcm) +{
- snd_pcm_rate_t *rate = pcm->private_data;
- snd_pcm_rate_sync_hwptr0(pcm, *rate->gen.slave->hw.ptr);
+}
static int snd_pcm_rate_hwsync(snd_pcm_t *pcm) { snd_pcm_rate_t *rate = pcm->private_data; @@ -586,10 +591,37 @@ static int snd_pcm_rate_hwsync(snd_pcm_t *pcm) return 0; }
+static snd_pcm_uframes_t snd_pcm_rate_playback_internal_delay(snd_pcm_t *pcm) +{
- snd_pcm_rate_t *rate = pcm->private_data;
- if (rate->appl_ptr < rate->last_commit_ptr) {
return rate->appl_ptr - rate->last_commit_ptr + pcm->boundary;- } else {
return rate->appl_ptr - rate->last_commit_ptr;- }
+}
static int snd_pcm_rate_delay(snd_pcm_t *pcm, snd_pcm_sframes_t *delayp) {
- snd_pcm_rate_t *rate = pcm->private_data;
- snd_pcm_sframes_t slave_delay;
- int err;
- snd_pcm_rate_hwsync(pcm);
- *delayp = snd_pcm_mmap_hw_avail(pcm);
- err = snd_pcm_delay(rate->gen.slave, &slave_delay);
- if (err < 0) {
return err;- }
- if (pcm->stream == SND_PCM_STREAM_PLAYBACK) {
*delayp = rate->ops.input_frames(rate->obj, slave_delay)+ snd_pcm_rate_playback_internal_delay(pcm);- } else {
*delayp = rate->ops.output_frames(rate->obj, slave_delay)+ snd_pcm_mmap_capture_hw_avail(pcm);- } return 0;
}
@@ -1083,15 +1115,17 @@ static int snd_pcm_rate_status(snd_pcm_t *pcm, snd_pcm_status_t * status) status->state = SND_PCM_STATE_RUNNING; status->trigger_tstamp = rate->trigger_tstamp; }
- snd_pcm_rate_sync_hwptr(pcm);
- snd_pcm_rate_sync_hwptr0(rate, status->hw_ptr); status->appl_ptr = *pcm->appl.ptr; status->hw_ptr = *pcm->hw.ptr; if (pcm->stream == SND_PCM_STREAM_PLAYBACK) {
status->delay = snd_pcm_mmap_playback_hw_avail(pcm);
status->delay = rate->ops.input_frames(rate->obj, status->delay)+ snd_pcm_rate_playback_internal_delay(pcm);
status->delay = snd_pcm_mmap_capture_hw_avail(pcm);
status->delay = rate->ops.output_frames(rate->obj, status->delay)+ snd_pcm_mmap_capture_hw_avail(pcm);-- 2.5.5
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