1SND_PCM_PLAYBACK_REA(9)          Sound Devices         SND_PCM_PLAYBACK_REA(9)
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NAME

6       snd_pcm_playback_ready - check whether the playback buffer is available
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SYNOPSIS

9       int snd_pcm_playback_ready(struct snd_pcm_substream * substream);
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ARGUMENTS

12       substream
13           the pcm substream instance
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DESCRIPTION

16       Checks whether enough free space is available on the playback buffer.
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18       Returns non-zero if available, or zero if not.
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21Kernel Hackers Manual 2.6.         June 2019           SND_PCM_PLAYBACK_REA(9)
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