snd_pcm_new_internal(9) centos man page | unix.com

SND_PCM_NEW_INTERNAL(9) 					      PCM API						   SND_PCM_NEW_INTERNAL(9)

NAME
       snd_pcm_new_internal - create a new internal PCM instance

SYNOPSIS
       int snd_pcm_new_internal(struct snd_card * card, const char * id, int device, int playback_count, int capture_count,
				struct snd_pcm ** rpcm);

ARGUMENTS
       card
	   the card instance

       id
	   the id string

       device
	   the device index (zero based - shared with normal PCMs)

       playback_count
	   the number of substreams for playback

       capture_count
	   the number of substreams for capture

       rpcm
	   the pointer to store the new pcm instance

DESCRIPTION
       Creates a new internal PCM instance with no userspace device or procfs entries. This is used by ASoC Back End PCMs in order to create a PCM
       that will only be used internally by kernel drivers. i.e. it cannot be opened by userspace. It provides existing ASoC components drivers
       with a substream and access to any private data.

       The pcm operators have to be set afterwards to the new instance via snd_pcm_set_ops.

RETURN
       Zero if successful, or a negative error code on failure.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						   SND_PCM_NEW_INTERNAL(9)