snd_pcm_lib_ioctl (9) Linux Manual Page
snd_pcm_lib_ioctl – a generic PCM ioctl callback
Synopsis
int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg);Arguments
substream
-
- the pcm substream instance
cmd
- ioctl command
arg
- ioctl argument
Description
Processes the generic ioctl commands for PCM. Can be passed as the ioctl callback for PCM ops.
Return
Zero if successful, or a negative error code on failure.