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SND_PCM_NEW_INTERNAL(9) Sound Devices 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

February 2017 Kernel Hackers Manual 3.16