#!/bin/bash

initial_gain=0
initial_exposure_time=0

while true; do sleep 0.5;
	# Read center camera controls
	echo `v4l2-ctl -d /dev/video0 --get-ctrl=gain --get-ctrl=exposure` > controls
	awk '{print $2}' controls > get_control
	actual_gain=`cat get_control`
	awk '{print $4}' controls > get_control
	actual_exposure_time=`cat get_control`
	
	# Print controls	
	#echo -e "\n**Center Camera Controls**"	
	#cat controls
	# Remove temp files
	rm controls get_control
	# Set R/L camera controls manually
	if [ $actual_gain -ne $initial_gain ]; then
                v4l2-ctl -d /dev/video1 --set-ctrl=gain=$actual_gain
        fi
	if [ $actual_exposure_time -ne $initial_exposure_time ]; then
                v4l2-ctl -d /dev/video1 --set-ctrl=exposure=$actual_exposure_time
        fi
	# Define new initial value
	initial_gain=$actual_gain
	initial_exposure_time=$actual_exposure_time
done