#!/bin/bash

gnome-screensaver-command -i -r "Mplayer running" &
SPID=$!

function r_exit() {
        kill $SPID
}

trap r_exit 9 
trap r_exit 3
trap r_exit 1

mplayer -ao alsa:device=hw=1.2 -ac hwdts,hwac3, -fs "$@"

r_exit