int ioctl(int fd, int request = AUDIO_SET_MUTE, boolean state) Arguments

int fd File descriptor returned by a previous call to open().
int request Equals AUDIO_SET_MUTE for this command.
boolean state Indicates if audio device shall mute or not.
  TRUE Audio Mute
  FALSE Audio Un-mute Description

This ioctl is for DVB devices only. To control a V4L2 decoder use the V4L2 ioctl VIDIOC_DECODER_CMD, VIDIOC_TRY_DECODER_CMD with the V4L2_DEC_CMD_START_MUTE_AUDIO flag instead.

This ioctl call asks the audio device to mute the stream that is currently being played. Return Value

On success 0 is returned, on error -1 and the errno variable is set appropriately. The generic error codes are described at the Generic Error Codes chapter.