#!/bin/bash
#
# Date:    2009-12-16
# Author:  Ole Kristian Lien
# License: GNU General Public License
#
# Check if the left and right channel is equal.
# if not equal, exit code 3..

# ext-format må fikses!! hmm

EXT=`echo "$1"|awk -F . '{print $NF}'`
NAME=`basename $1 .$EXT`
FORMAT=`./audio_format $1`

if [ -z "$1" ]; then
	echo "Usage: $0 <video-file>"
	exit 1
fi

echo "Checking $1 audio channels..."

if [ ! -f "$NAME.$FORMAT" ]; then
	echo "File $NAME.$FORMAT does not exists."
	./audio_extract $1 0 60 # øke til feks 2?
fi

./audio_split $NAME.$FORMAT
./audio_stats $NAME-left.wav &> $NAME-left.stat
./audio_stats $NAME-right.wav &> $NAME-right.stat

# find a better method to compare audio!
LEFT=`grep Mean $NAME-left.stat | md5sum`
RIGHT=`grep Mean $NAME-right.stat | md5sum`

if [ "$LEFT" == "$RIGHT" ]; then
	echo "Audio channels is equal."
	rm $NAME.$FORMAT $NAME-left* $NAME-right*
	exit
else
	echo "Audio channels is not equal."
	rm $NAME.$FORMAT $NAME-left* $NAME-right*
	exit 3
fi