snd_pcm_period_elapsed(9) centos man page | unix.com

SND_PCM_PERIOD_ELAPS(9) 					      PCM API						   SND_PCM_PERIOD_ELAPS(9)

NAME
       snd_pcm_period_elapsed - update the pcm status for the next period

SYNOPSIS
       void snd_pcm_period_elapsed(struct snd_pcm_substream * substream);

ARGUMENTS
       substream
	   the pcm substream instance

DESCRIPTION
       This function is called from the interrupt handler when the PCM has processed the period size. It will update the current pointer, wake up
       sleepers, etc.

       Even if more than one periods have elapsed since the last call, you have to call this only once.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						   SND_PCM_PERIOD_ELAPS(9)