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pcm: hw - prevent divide by zero for broken apps

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Fixes: https://github.com/alsa-project/alsa-lib/issues/318
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Jaroslav Kysela 2023-05-16 08:57:31 +02:00
parent 904f0f7e7a
commit 3661bdae35
1 changed files with 3 additions and 0 deletions
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3
src/pcm/pcm_hw.c
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@ -742,6 +742,9 @@ static int snd_pcm_hw_drain(snd_pcm_t *pcm)
if (pcm->stream != SND_PCM_STREAM_PLAYBACK)
goto __skip_silence;
/* stream probably in SETUP, prevent divide by zero */
if (pcm->period_size == 0)
goto __skip_silence;
if (hw->drain_silence == 0 || hw->perfect_drain)
goto __skip_silence;
snd_pcm_sw_params_current_no_lock(pcm, &sw_params);