snd_pcm_channel_status()

Get the runtime status of a PCM channel

Synopsis:

#include <sys/asoundlib.h>

int snd_pcm_channel_status( 
       snd_pcm_t *handle, 
       snd_pcm_channel_status_t *status );

Arguments:

handle
The handle for the PCM device, which you must have opened by calling snd_pcm_open() or snd_pcm_open_preferred() .
status
A pointer to a snd_pcm_channel_status_t structure that snd_pcm_channel_status() fills with information about the PCM channel's status.

Fill in the status structure's channel member to specify the direction. All other members are read-only.

Library:

libasound.so

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

Description:

The snd_pcm_channel_status() function fills the status structure with data about the PCM channel's runtime status.

Returns:

Zero on success, or a negative error code.

Errors:

-EBADFD
The pcm device state isn't ready.
-EFAULT
Failed to copy data.
-EINVAL
Invalid handle or data pointer is NULL.

Classification:

QNX Neutrino

Safety:
Cancellation point No
Interrupt handler No
Signal handler Yes
Thread Yes