1SND_PCM_PLAYBACK_DAT(9)          Sound Devices         SND_PCM_PLAYBACK_DAT(9)
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NAME

6       snd_pcm_playback_data - check whether any data exists on the playback
7       buffer
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SYNOPSIS

10       int snd_pcm_playback_data(struct snd_pcm_substream * substream);
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ARGUMENTS

13       substream
14           the pcm substream instance
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DESCRIPTION

17       Checks whether any data exists on the playback buffer. If
18       stop_threshold is bigger or equal to boundary, then this function
19       returns always non-zero.
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21       Returns non-zero if exists, or zero if not.
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24Kernel Hackers Manual 2.6.       November 2011         SND_PCM_PLAYBACK_DAT(9)
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