#!/bin/bash
#This program is free software; you can redistribute it and/or modify
#it under the terms of the GNU General Public License version 2 as published by
#the Free Software Foundation.

#This program is distributed in the hope that it will be useful,
#but WITHOUT ANY WARRANTY; without even the implied warranty of
#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#GNU General Public License for more details:
#http://www.gnu.org/copyleft/gpl.html

#Any questions at all, email me at: dave@davidstark.name

if ! [ -e "$1" ]
then
    echo "$1 does not exist."
    echo "Exiting."
    exit 1
fi

INFILE="$1"

if file -L "$INFILE" | grep RIFF | grep PCM | grep "16 bit" | grep stereo | grep 44100 &> /dev/null
    then
    RAWFILE="$INFILE"
else
    if [ -e "$INFILE".wav ]
	then
	echo "Decode output file: $INFILE.wav already exists."
	echo "Exiting."
	exit 1
    fi
    if ! mplayer -vo null -vc null -af lavcresample=44100,channels=2,format=s16le -ao pcm:file="$INFILE".wav "$INFILE"
	then
	echo "Couldn't decode $INFILE"
	echo "Exiting."
	exit 1
    fi
    RAWFILE="$INFILE".wav
fi

if ! flac -8 "$RAWFILE"
    then
    echo "Couldn't encode $OUTFILE."
    echo "Exiting."
    if [ "$RAWFILE" != "$INFILE" ]
	then
	rm -f "$RAWFILE"
    fi
    exit 1
fi

if [ "$RAWFILE" != "$INFILE" ]
    then
    rm -f "$RAWFILE"
fi