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 );
Before calling this function, set the info structure's channel member to specify the direction. This function sets all the other member.
If the rates, formats, min_rate, max_rate, min_voices, max_voices, and max_fragsize fields of snd_pcm_channel_info_t all contain zeroed data, the PCM device is currently not available for further playback or capture sessions.
The snd_pcm_plugin_info() function fills the info structure with data about the PCM channel selected by handle.
EOK on success, a negative errno upon failure. The errno values are available in the errno.h file.
QNX Neutrino
Safety: | |
---|---|
Cancellation point | No |
Interrupt handler | No |
Signal handler | Yes |
Thread | Read the Caveats |
This function is not thread safe if handle (snd_pcm_t) is used across multiple threads.
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.