Get information about a PCM channel's capabilities (plugin-aware)
#include <sys/asoundlib.h> int snd_pcm_plugin_info( snd_pcm_t *handle, snd_pcm_channel_info_t *info );
- The handle for the PCM device, which you must have opened by calling snd_pcm_open() or snd_pcm_open_preferred() .
- A pointer to a
structure that snd_pcm_plugin_info() fills in 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.
Use the -l asound option to qcc to link against this library.
The snd_pcm_plugin_info() function fills the info structure with data about the PCM channel selected by handle.
Zero on success, or a negative error code (errno is set).
- Invalid handle.
This function is the plugin-aware version of snd_pcm_channel_info() . It functions exactly the same way. However, make sure that you don't mix and match plugin- and nonplugin-aware functions in your application, or you may get undefined behavior and misleading results.