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Get a mixer switch setting
#include <sys/asoundlib.h >
int snd_ctl_mixer_switch_read(
snd_ctl_t *handle,
int dev,
snd_switch_t * sw )
- handle
- The handle for the control device. This must have been created by
snd_ctl_open().
- dev
- The mixer device the switches apply to.
- sw
- A pointer to a snd_switch_t structure that
snd_ctl_mixer_switch_read() fills with information about the
switch.
libasound.so
The snd_ctl_mixer_switch_read() function reads the
snd_switch_t structure for the switch identified by the
name member of the structure.
|
You must initialize the name member before calling this function. |
Zero on success, or a negative value if an error occurs.
- -EINVAL
- Invalid handle argument.
- -ENXIO
- The group wasn't found.
QNX Neutrino
Safety: | |
Cancellation point |
No |
Interrupt handler |
No |
Signal handler |
Yes |
Thread |
Yes |
snd_mixer_groups(),
mix_ctl.c application example
source code
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