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pcm: document interaction of drain silence and sw silence parameter #381

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pcm: document interaction of drain silence and sw silence parameter #381

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4 changes: 4 additions & 0 deletions src/pcm/pcm.c
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Original file line number Diff line number Diff line change
Expand Up @@ -6895,6 +6895,10 @@ int snd_pcm_sw_params_get_silence_threshold(const snd_pcm_sw_params_t *params, s
* underrun is nearer than silence threshold (see
* #snd_pcm_sw_params_set_silence_threshold)
*
* When drain silence (see #snd_pcm_hw_params_get_drain_silence) is disabled,
* this will also apply for draining, i.e. silence is written also when the
* drain end is nearer than the silence threshold.
*
* The special case is when silence size value is equal or greater than
* boundary. The unused portion of the ring buffer (initial written samples
* are untouched) is filled with silence at start. Later, only just processed
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