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.