SND_PCM_NEW_INTERNAL(9) Sound Devices SND_PCM_NEW_INTERNAL(9)NAMEsnd_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.
COPYRIGHTKernel Hackers Manual 3.11 November 2013 SND_PCM_NEW_INTERNAL(9)