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SND_PCM_NEW_INTERNAL(9) | PCM API | SND_PCM_NEW_INTERNAL(9) |
NAME¶
snd_pcm_new_internal - create a new internal PCM instanceSYNOPSIS¶
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¶
cardthe 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¶
January 2017 | Kernel Hackers Manual 4.8. |