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.
Return
Non-zero if any data exists, or zero if not. If stop_threshold
is bigger or equal to boundary, then this function returns always non-zero.