snd_pcm_channel_info()

Get information about a PCM channel's current capabilities

Synopsis:

#include <sys/asoundlib.h>

int snd_pcm_channel_info(
       snd_pcm_t *handle, 
       snd_pcm_channel_info_t *info );

handle: The handle for the PCM device, which you must have opened by calling snd_pcm_open() or snd_pcm_open_preferred() .
info: A pointer to a snd_pcm_channel_info_t structure that snd_pcm_channel_info() fills with information about the PCM channel.
Before calling this function, set the info structure's channel member to specify the direction. This function sets all the other members.

libasound.so

Use the -l asound option to qcc to link against this library.

The snd_pcm_channel_info() function fills the info structure with the current capabilities of the PCM channel selected by handle.

This function and the plugin-aware version, snd_pcm_plugin_info() , get a dynamic snapshot of the system's current capabilities, which can shrink and grow as subchannels are allocated and freed. They're similar to snd_ctl_pcm_channel_info() , which gets information about the complete capabilities of the system.

Zero on success, or a negative error code.

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