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pcm: direct: Add generic hw_ptr_alignment function for dmix, dshare and dsnoop

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Move the code snd_pcm_direct_reset_slave_ptr() from pcm_dmix.c
to pcm_direct.c and its header so that the helper function can be
re-used by other direct-pcm plugins.
There is no change in the behavior or the functionality.

Signed-off-by: Vanitha Channaiah <vanitha.channaiah@in.bosch.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Vanitha Channaiah 2019-05-15 11:56:32 +05:30 • committed by Takashi Iwai
parent 9122992a91
commit 63ba5243ab
3 changed files with 29 additions and 23 deletions
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19
src/pcm/pcm_direct.c
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@ -2040,3 +2040,22 @@ int snd_pcm_direct_parse_open_conf(snd_config_t *root, snd_config_t *conf,
return 0;
}
void snd_pcm_direct_reset_slave_ptr(snd_pcm_t *pcm, snd_pcm_direct_t *dmix)
{
dmix->slave_appl_ptr = dmix->slave_hw_ptr = *dmix->spcm->hw.ptr;
if (dmix->hw_ptr_alignment == SND_PCM_HW_PTR_ALIGNMENT_ROUNDUP ||
(dmix->hw_ptr_alignment == SND_PCM_HW_PTR_ALIGNMENT_AUTO &&
pcm->buffer_size <= pcm->period_size * 2))
dmix->slave_appl_ptr =
((dmix->slave_appl_ptr + dmix->slave_period_size - 1) /
dmix->slave_period_size) * dmix->slave_period_size;
else if (dmix->hw_ptr_alignment == SND_PCM_HW_PTR_ALIGNMENT_ROUNDDOWN ||
(dmix->hw_ptr_alignment == SND_PCM_HW_PTR_ALIGNMENT_AUTO &&
(dmix->slave_period_size * SEC_TO_MS) /
pcm->rate < LOW_LATENCY_PERIOD_TIME))
dmix->slave_appl_ptr = dmix->slave_hw_ptr =
((dmix->slave_hw_ptr / dmix->slave_period_size) *
dmix->slave_period_size);
}