Mythtv HDPVR color fixer

#!/bin/sh

#A hack to "fix" the HDPVR color saturation issue in MythTV
#Run this as a "Recording Started" event.

#Sleep a bit to let recording get started.
sleep 2;

#is kernel < 3.4? This is supposedly fixed in kernel >= 3.4
fixed_ver=3.4
kern_ver=$(uname -r | cut -f 1-2 -d .)

if [ $(expr $kern_ver \< $fixed_ver) -ne 1 ];
then
        exit 0
fi

color_fix() {
        device=$1
        /usr/bin/v4l2-ctl --device=$device --set-ctrl brightness=0x80 --set-ctrl contrast=0x40 --set-ctrl hue=0xf --set-ctrl saturation=0x40 --set-ctrl sharpness=0x80  || exit $?
}

for device in /dev/hdpvr*; do
        color_fix $device;
done