Name

snd_pcm_playback_data — check whether any data exists on the playback buffer

Synopsis

int snd_pcm_playback_data (struct snd_pcm_substream * substream);

Arguments

substream

the pcm substream instance

Description

Checks whether any data exists on the playback buffer. If stop_threshold is bigger or equal to boundary, then this function returns always non-zero.

Returns non-zero if exists, or zero if not.