snd_pcm_playback_empty(9) centos man page | unix.com

SND_PCM_PLAYBACK_EMP(9) 					   Sound Devices					   SND_PCM_PLAYBACK_EMP(9)

NAME
       snd_pcm_playback_empty - check whether the playback buffer is empty

SYNOPSIS
       int snd_pcm_playback_empty(struct snd_pcm_substream * substream);

ARGUMENTS
       substream
	   the pcm substream instance

DESCRIPTION
       Checks whether the playback buffer is empty.

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

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Kernel Hackers Manual 3.10					     June 2014						   SND_PCM_PLAYBACK_EMP(9)