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dmix skipping first set of samples

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There was a change in alsa-lib 1.0.16 which looks like it was designed to
make dmix skip samples in the case of underruns, but it causes the first
sample to be skipped since dmix->slave_hw_ptr == dmix->slave_appl_ptr.
The following patch fixes this and fixes a small typo in the comment.

From: Mike Gorse <mgorse@mgorse.dhs.org>
This commit is contained in:
Takashi Iwai 2008-03-10 12:02:26 +01:00
parent d587383d6b
commit fe8bb13400
1 changed files with 2 additions and 2 deletions
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4
src/pcm/pcm_dmix.c
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@ -311,9 +311,9 @@ static void snd_pcm_dmix_sync_area(snd_pcm_t *pcm)
if (size >= pcm->boundary / 2) if (size >= pcm->boundary / 2)
size = pcm->boundary - size; size = pcm->boundary - size;
/* the slave_app_ptr can be far behing the slave_hw_ptr */ /* the slave_app_ptr can be far behind the slave_hw_ptr */
/* reduce mixing and errors here - just skip not catched writes */ /* reduce mixing and errors here - just skip not catched writes */
if (dmix->slave_hw_ptr < dmix->slave_appl_ptr) if (dmix->slave_hw_ptr <= dmix->slave_appl_ptr)
slave_size = dmix->slave_appl_ptr - dmix->slave_hw_ptr; slave_size = dmix->slave_appl_ptr - dmix->slave_hw_ptr;
else else
slave_size = dmix->slave_appl_ptr + (dmix->slave_boundary - dmix->slave_hw_ptr); slave_size = dmix->slave_appl_ptr + (dmix->slave_boundary - dmix->slave_hw_ptr);