snd_pcm_plugin_info()
Get information about a PCM channel's capabilities (plugin-aware)
Synopsis:
#include <sys/asoundlib.h>
int snd_pcm_plugin_info(
snd_pcm_t *handle,
snd_pcm_channel_info_t *info );
Arguments:
- 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_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.
Library:
libasound.so
Use the -l asound option to qcc to link against this library.
Description:
The snd_pcm_plugin_info() function fills the info structure with data about the PCM channel selected by handle.
Returns:
Zero on success, or a negative error code (errno is set).
Errors:
- -EINVAL
- Invalid handle.
Classification:
QNX Neutrino
| Safety: | |
|---|---|
| Cancellation point | No |
| Interrupt handler | No |
| Signal handler | Yes |
| Thread | Yes |
Caveats:
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.