snd_ctl_mixer_switch

Adjust a mixer switch setting

Synopsis:

#include  < sys/asoundlib.h > 

int snd_ctl_mixer_switch_write(
       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_write() writes to the driver about the switch.

libasound.so

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

The snd_ctl_mixer_switch_write() function writes the snd_switch_t structure for the switch identified by the structure's name member.

Zero on success, or a negative value if an error occurs.

QNX Neutrino

The switch struct must be initialized completely before making the call.