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

int fd File descriptor returned by a previous call to open().
int request Equals AUDIO_AV_SYNC for this command.
boolean state Tells the DVB subsystem if A/V synchronization shall be ON or OFF.
  TRUE AV-sync ON
  FALSE AV-sync OFF Description

This ioctl call asks the Audio Device to turn ON or OFF A/V synchronization. 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.