snd_mixer_element_write()
Set a mixer element's configurable parameters
Synopsis:
#include <sys/asoundlib.h>
int snd_mixer_element_write(
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 from which snd_mixer_element_read() sets the element's configurable parameters.
Library:
libasound.so
Use the -l asound option to qcc to link against this library.
Description:
The snd_mixer_element_write() function writes the given snd_mixer_element_t structure to the driver.
We recommend that you work with mixer groups instead of manipulating the
elements directly.
Returns:
Zero on success, or a negative value on error.
Errors:
- -EBUSY
- The element has been modified by another application.
- -EINVAL
- Invalid handle or element argument.
- -ENXIO
- The element wasn't found.
Classification:
QNX Neutrino
| Safety: | |
|---|---|
| Cancellation point | No |
| Interrupt handler | No |
| Signal handler | Yes |
| Thread | Yes |
Caveats:
The write may fail with -EBUSY if another application has modified the element, and this application hasn't read that event yet using snd_mixer_read() .