snd_pcm_info()

Updated: October 26, 2022

Get general information about a PCM device

Synopsis:

#include <sys/asoundlib.h>

int snd_pcm_info( snd_pcm_t *handle, 
                  snd_pcm_info_t *info );

Arguments:

handle
The handle for the PCM device, which you must have opened by calling snd_pcm_open_name(), snd_pcm_open(), or snd_pcm_open_preferred().
info
A pointer to a snd_pcm_info_t structure in which snd_ctl_pcm_info() stores the information.

Library:

libasound.so

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

Description:

The snd_pcm_info() function fills the info structure with information about the capabilities of the PCM device selected by handle.

Returns:

Zero on success, or a negative error code.

Errors:

-EINVAL
The state of handle is invalid or an invalid state change occurred. You can call snd_pcm_channel_status() to check if the state change was invalid.

Classification:

QNX Neutrino

Safety:  
Cancellation point No
Interrupt handler No
Signal handler Yes
Thread Read the Caveats

Caveats:

This function is not thread safe if handle (snd_pcm_t) is used across multiple threads.