#! /bin/sh

TRACK=""

while getopts a: opt; do
   case $opt in
      a) TRACK="-a $OPTARG" ;;
   esac
done
shift `expr $OPTIND - 1`

if [ -z "$1" ]; then
   echo "Usage: $0 input_dir [type [codec]]"
   exit 1
elif [ -z "$2" ]; then
   type=vob
   codec=ac3
elif [ -z "$3" ]; then
   type="$2"
   codec=ac3
elif [ -z "$4" ]; then
   type="$2"
   codec="$3"
else
   echo "Usage: $0 input_dir type codec"
   exit 1
fi

tccat -i "$1" | tcextract -t "$type" -x "$codec" $TRACK | tcdecode -x "$codec" | tcscan -x pcm