SND_PCM_PLAYBACK_DAT(9) Sound Devices SND_PCM_PLAYBACK_DAT(9)
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.
COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 SND_PCM_PLAYBACK_DAT(9)
