Get information about a PCM channel's current capabilities
#include <sys/asoundlib.h> int snd_pcm_channel_info( snd_pcm_t *handle, snd_pcm_channel_info_t *info );
Before calling this function, set the info structure's channel member to specify the direction. This function sets all the other members.
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.
snd_ctl_pcm_channel_info(), snd_pcm_channel_info_t, snd_pcm_plugin_info()