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.