#!/bin/ksh
#
# Re-encode mp3 files shipped by EVE Online's Windows client for use with wine
# Run in ~/.wine/drive_c/Program\ Files/CCP/EVE/res/audio/Jukebox
#
# Copyright 2011 Waveclaw.net
# License: GPL
# Warranty: not suitable for any purpose, use at your own risk!
#
# Version History
#
# 2005-08-11 JDP mangle-sound.sh based on _Linux_Server_Hacks_
#        2003 Rob Flickenger, O'Reilly
# 2009-03-24 JDP Convert id3v2 to getMplayerID Perl script for tags
# 2011-02-10 JDP Specialize mangle-sound.sh for remasting Eve files
# 2011-02-11 JDP Posted Stripped Version to pastebin
# 2011-02-12 JDP Replace getMplayerID perl script with mplayer
# 2011-02-13 JDP Cleanup, restore comments and repost to pastebin
# 2011-02-15 JDP Fix backwards variable substitution in get_all_tags
#
PATH=/bin:/usr/bin:/sbin:/usr/sbin:/usr/local/sbin:~/bin
EXT=mp3
DATE=`date +%Y%m%d`
BACKUP_LOCATION=backup.$DATE

if [ 0 -eq $UID ];
then
    echo "Please do not run `basename $0` as root!"
    exit;
fi

is_installed() {
 PROGRAM=$1
 PATHNAME=$( type $PROGRAM 2> /dev/null )
 if [ -z "$PATHNAME" ]; then
  echo "cannot locate $PROGRAM in path"
  exit 1
 fi
}

get_tag() {
 TAG=$1
 FILE=$2
 $MPLAYER -vo null -ao null -frames 0 -identify $FILE 2>/dev/null \
  | grep "${TAG}:" | sed -e "s/${TAG}: //g"
}

get_all_tags() {
 FILE=$1
 TITLE=`get_tag Title "$FILE"`; TITLE=${TITLE:-"$FILE"}
 COMMENT=`get_tag Comment "$FILE"`; COMMENT=${COMMENT:-'Unknown'}
 ALBUM=`get_tag Album "$FILE"` ; ALBUM=${ALBUM:-'EVE Online'}
 ARTIST=`get_tag Artist "$FILE"` ; ARTIST=${ARTIST:-'Jon Hailur'}
#No Year, Genre or Track on Eve files
# YEAR=`get_tag Year "$NAME"`
# GENRE=`get_tag Genre "$FILE"`'
# TRACK=`get_tag Track "$NAME"`
 YEAR=`date +%Y`
 GENRE=soundtrack
 TRACK="${FILE#Ambient}"
 TRACK="${TRACK%%.$EXT}"
}

decode_file() {
 FILE=$1
 $MPLAYER -vc null -vo null -ao pcm:fast $FILE 2>&1 >/dev/null
 mv audiodump.wav "${FILE%%.$EXT}.wav"
}

encode_file() {
 FILE="${1%%.$EXT}"
 $LAME "$FILE.wav" --tt "$TITLE" --tl "$ALBUM" --ta "$ARTIST" \
       --tg "$GENRE" --ty "$YEAR" --tn "$TRACK"
 mv "$FILE.wav.$EXT" "$FILE.$EXT"
}

is_installed mplayer
MPLAYER=`which mplayer`
is_installed lame
LAME=`which lame`

mkdir -p $BACKUP_LOCATION

echo "Remastering all MP3 files in current directory!"
echo "Originals backuped up to $BACKUP_LOCATION"

for NAME in *.${EXT};
do
 echo "Processing $NAME"
 echo "--------------------------------------------------------------"

# tags
 get_all_tags $NAME
 echo "Title: $TITLE"
 echo "Genre: $GENRE"
 echo "Comment: $COMMENT"
 echo "Album: $ALBUM"
 echo "Artist: $ARTIST"
 echo "Year: $YEAR"
 echo "Track: $TRACK"

# convert
 decode_file "$NAME"

# backup
if [ -d "$BACKUP_LOCATION" ]
then
 mv "$NAME" "$BACKUP_LOCATION"
else
 echo "Could not backup $NAME"
 exit 1
fi

# replace
 encode_file "$NAME"

# cleanup
 rm "$FILE.wav"
done