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 4.8.                 January 2017                   SND_PCM_NEW_INTERNAL(9)