snd_pcm_new_internal (9) - Linux Manuals

snd_pcm_new_internal: create a new internal PCM instance

Command to display snd_pcm_new_internal manual in Linux: $ man 9 snd_pcm_new_internal

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

: 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.