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pcm: dshare: enable silence

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This issue depends on system load - if the process using dshare is
scheduled fast enough, then there is no noise. A delay of e.g >~2ms
produces hearable noise.

Reproduction with instrumented aplay(sleep every 100th period for a
given time):
During the sleep time of 2000000us (2s) the hardware plays old samples
in a loop before xrun is detected and recovered after the sleep.
This is resolved by placing it in silence, in case of dshare plugin.

Signed-off-by: Alexander Jahn <ajahn@de.adit-jv.com>
Signed-off-by: Andreas Pape <apape@de.adit-jv.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Alexander Jahn 2016-12-30 11:59:11 +05:30 • committed by Takashi Iwai
parent 0a61c79681
commit 8eeee1ab7d
1 changed files with 2 additions and 1 deletions
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3
src/pcm/pcm_direct.c
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@ -1161,7 +1161,8 @@ int snd_pcm_direct_initialize_slave(snd_pcm_direct_t *dmix, snd_pcm_t *spcm, str
return ret;
}
if (dmix->type != SND_PCM_TYPE_DMIX)
if (dmix->type != SND_PCM_TYPE_DMIX &&
dmix->type != SND_PCM_TYPE_DSHARE)
goto __skip_silencing;
ret = snd_pcm_sw_params_set_silence_threshold(spcm, &sw_params, 0);