snd_mixer_element_read()

Get a mixer element's configurable parameters

Synopsis:

#include <sys/asoundlib.h>

int snd_mixer_element_read(
       snd_mixer_t *handle, 
       snd_mixer_element_t *element );

Arguments:

handle

The handle for the mixer device. This must have been created by snd_mixer_open().

element

A pointer to a snd_mixer_element_t in which snd_mixer_element_read() stores the element's configurable parameters.

Library:

libasound.so

Description:

The snd_mixer_element_read() function fills the snd_mixer_element_t structure with information on the current settings of the element identified by the eid substructure.

---

We recommend that you work with mixer groups instead of manipulating the elements directly.

---

Returns:

Zero on success, or a negative error value on error.

Errors:

-EINVAL

Invalid handle or element argument.

-ENXIO

The element wasn't found.

Classification:

QNX Neutrino

Caveats:

The element struct must be initialized to a known state before making the call: use memset() to set the struct to zero, and then set the eid member to specify which element to read.

See also:

snd_mixer_element_t, snd_mixer_element_write(), snd_mixer_elements()