snd_pcm_playback_ready(9) centos man page | unix.com

SND_PCM_PLAYBACK_REA(9) 					   Sound Devices					   SND_PCM_PLAYBACK_REA(9)

NAME
       snd_pcm_playback_ready - check whether the playback buffer is available

SYNOPSIS
       int snd_pcm_playback_ready(struct snd_pcm_substream * substream);

ARGUMENTS
       substream
	   the pcm substream instance

DESCRIPTION
       Checks whether enough free space is available on the playback buffer.

RETURN
       Non-zero if available, or zero if not.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						   SND_PCM_PLAYBACK_REA(9)