From a4444da31ec92f89cd6923579c20a9c240439cfc Mon Sep 17 00:00:00 2001 From: Jaroslav Kysela Date: Thu, 28 May 2009 12:31:56 +0200 Subject: ALSA: PCM midlevel: lower jiffies check margin using runtime->delay value When hardware has large FIFO, it is necessary to lower jiffies margin by count of queued samples. Signed-off-by: Jaroslav Kysela Signed-off-by: Takashi Iwai --- sound/core/pcm_lib.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) (limited to 'sound') diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c index 0f299a5ad6da..dd9126b92c19 100644 --- a/sound/core/pcm_lib.c +++ b/sound/core/pcm_lib.c @@ -263,6 +263,9 @@ static int snd_pcm_update_hw_ptr_interrupt(struct snd_pcm_substream *substream) if (runtime->hw.info & SNDRV_PCM_INFO_BATCH) goto no_jiffies_check; hdelta = new_hw_ptr - old_hw_ptr; + if (hdelta < runtime->delay) + goto no_jiffies_check; + hdelta -= runtime->delay; jdelta = jiffies - runtime->hw_ptr_jiffies; if (((hdelta * HZ) / runtime->rate) > jdelta + HZ/100) { delta = jdelta / @@ -349,8 +352,12 @@ int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream) new_hw_ptr = hw_base + pos; } /* Do jiffies check only in xrun_debug mode */ - if (xrun_debug(substream, 4) && - ((delta * HZ) / runtime->rate) > jdelta + HZ/100) { + if (!xrun_debug(substream, 4)) + goto no_jiffies_check; + if (delta < runtime->delay) + goto no_jiffies_check; + delta -= runtime->delay; + if (((delta * HZ) / runtime->rate) > jdelta + HZ/100) { hw_ptr_error(substream, "hw_ptr skipping! " "(pos=%ld, delta=%ld, period=%ld, jdelta=%lu/%lu)\n", @@ -359,6 +366,7 @@ int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream) ((delta * HZ) / runtime->rate)); return 0; } + no_jiffies_check: if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && runtime->silence_size > 0) snd_pcm_playback_silence(substream, new_hw_ptr); -- cgit v1.2.2