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.TH "SND_PCM_PLAYBACK_DATA" "" "06 October 2005" "" ""

.SH NAME
snd_pcm_playback_data \- check whether any data exists on the playback buffer
.SH SYNOPSIS
"SYNOPSIS"
.sp
\fB
.sp
int snd_pcm_playback_data  (snd_pcm_substream_t * \fIsubstream\fB);
\fR
.SH "ARGUMENTS"
.TP
\fB\fIsubstream\fB\fR
the pcm substream instance
.SH "DESCRIPTION"
.PP
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.
.PP
Returns non-zero if exists, or zero if not.