#!/bin/sh

##################################################
#                 MP3OGG v2.0.6                  ##
#        convert mp3 files to ogg vorbis         ##
# requires mpg123, mp3info & oggenc              ##
# (c) 2003,2004 Loran Hughes, loran@oldcrank.com ##
# Permission is granted to freely distribute     ##
# as long as this copyright notice is attached.  ##
#                                                ##
# This program is free software; you can         ##
# redistribute it and/or modify it under the     ##
# terms of the GNU General Public License 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.                                       ##
###################################################
 ##################################################

# v2.0.6, 6/25/2004
#   - Added "-s" and "-d" parameters
#   - (modified by Trey Hunner)
#   - fixed Mp3 and mP3 case problem

# v2.0.5, 4/11/2004
#   - Added default bitrate input when mp3info not found

# v2.0.4, 4/10/2004
#   - Fixed bug in upper case file type detection
#   - Added convert at median bitrate of original mp3
#   - General code clean up

# v2.0.3, 4/08/2004
#   - Fixed no parameter "filename with spaces" bug

# v2.0.2, 3/27/2004 
#   - Fixed crash in no parameter conversions
#   - Added check for upper case file type

# COMMAND LINE USAGE: mp3ogg file1.mp3 file2.mp3 "filename with spaces.mp3" ...
# INVOKING MP3OGG WITHOUT PARAMETERS WILL CONVERT
# ALL MP3 FILES IN THE CURRENT DIRECTORY

##### DEFINE FUNCTIONS

### HELP FUNCTION

help ()
{

ext=`echo "$file" | sed s/.*\.[Mm][Pp]3$/mp3/`

if [[ "$ext" == mp3 ]] ; then

    echo ""

    else

        echo ""
        echo "mp3ogg v 2.0.6 mp3 to ogg conversion script"
        echo "mp3ogg can be used in two ways, to convert one file and to convert"
        echo "whole directories of files at once."
        echo "Usage: mp3ogg [ file1.mp3 file2.mp3 \"filename with spaces.mp3\" ... ]"
        echo "Usage: mp3ogg -s -d"
        echo "Invoking mp3ogg with the -s parameter will supress error messages"
        echo "in screen output.  The -d parameter will delete all original versions"
        echo "of mp3 files without prompting first."
        echo ""
        exit 0
fi
}

### DELETION QUERY FUNCTION

delete_query ()
{
echo ""
echo "mp3ogg v 2.0.6 mp3 to ogg conversion script"

if [ "$p1" = "-d" ] || [ "$p2" = "-d" ] ; then
    mp3del=y
else
    echo -n "Delete original mp3 files after ogg conversion? [y/N]:"
    read mp3del
    mp3del=${mp3del:0:1}
    mp3del=`echo "$mp3del" | sed s/\\Y/y/`
fi
}

### DEFAULT BITRATE IF NO MP3INFO FUNCTION

detect_mp3info ()
{
if [ "$(type -t mp3info)" = file ] ; then
    echo ""

    else
        echo ""
        echo -n "Convert files at what bitrate? [32-192, default = 128]:"
        read bitrate
        bitrate=${bitrate:0:3}
#       bitrate=32

        if [[ "$bitrate" = "" ]] ; then

            bitrate=128
#           bitrate=32
            echo "Conversion bitrate set to 128"
            echo ""

        else

            if [[ "$bitrate" < 32 ]] || [[ "$bitrate" > 192 ]] ; then

            echo "Bitrate out of range. Setting to 128"
            echo ""
            bitrate=128
#           bitrate=32

            fi

        fi

fi
}

### SUPRESSION PARAMETER CHECKING FUNCTION

detect_supress()
{
if [ "$p1" = "-s" ] || [ "$p2" = "-s" ] ; then

    supress="y"

fi
}

### MP3 TO OGG CONVERSION FUNCTION

convert ()
{
# MAKE SURE FILE IS AN MP3
    ext=`echo "$file" | sed s/.*\.[Mm][Pp]3$/mp3/`

    if [[ "$ext" == mp3 ]] ; then

# FILE IS AN MP3, NOW TEST IF MP3INFO EXISTS

        if [ "$(type -t mp3info)" = file ] ; then

# MP3INFO EXISTS... GET BITRATE & ID3 INFO
            if [ "$supress" = "y" ] ; then
                bitrate=`mp3info -rm -p %r "$file" 2> /dev/null`
                title=`mp3info -p %t "$file" 2> /dev/null`
                artist=`mp3info -p %a "$file" 2> /dev/null`
                album=`mp3info -p %l "$file" 2> /dev/null`
                genre=`mp3info -p %g "$file" 2> /dev/null`
            else
                bitrate=`mp3info -rm -p %r "$file"`
                title=`mp3info -p %t "$file"`
                artist=`mp3info -p %a "$file"`
                album=`mp3info -p %l "$file"`
                genre=`mp3info -p %g "$file"`
            fi
# CONVERT MP3 TO OGG FORMAT WITH ID3 INFO

            if [ "$supress" = "y" ] ; then
                wavfile=`echo "$file" | sed s/\\.[Mm][Pp]3/.wav/ 2> /dev/null`
            else
                wavfile=`echo "$file" | sed s/\\.[Mm][Pp]3/.wav/`
            fi
            echo ""
            echo "** Converting \""$file"\" at median bitrate" $bitrate 
            echo ""
            mpg123 -q -w "$wavfile" "$file"
            if [ "$supress" = "y" ] ; then
                oggfile=`echo "$wavfile" | sed s/\\.wav/.ogg/ 2> /dev/null`
            else
                oggfile=`echo "$wavfile" | sed s/\\.wav/.ogg/`
            fi
            if [ "$supress" = "y" ] ; then
                oggenc "$wavfile" -o "$oggfile" -b $bitrate -t "$title" -a "$artist" -l "$album" -G "$genre" 2> /dev/null
            else
                oggenc "$wavfile" -o "$oggfile" -b $bitrate -t "$title" -a "$artist" -l "$album" -G "$genre"
            fi

        else

# MP3INFO NOT INSTALLED - CONVERT MP3 TO OGG FORMAT WITHOUT ID3 INFO

            if [ "$supress" = "y" ] ; then
                wavfile=`echo "$file" | sed s/\\.[Mm][Pp]3/.wav/ 2> /dev/null`
            else
                wavfile=`echo "$file" | sed s/\\.[Mm][Pp]3/.wav/`
            fi
            echo ""
            echo "** Converting \""$file"\" at bitrate" $bitrate
            echo ""
            mpg123 -q -w "$wavfile" "$file"
            if [ "$supress" = "y" ] ; then
                oggfile=`echo "$wavfile" | sed s/\\.wav/.ogg/ 2> /dev/null`
            else
                oggfile=`echo "$wavfile" | sed s/\\.wav/.ogg/`
            fi
            if [ "$supress" = "y" ] ; then
                oggenc "$wavfile" -o "$oggfile" -b $bitrate 2> /dev/null
            else
                oggenc "$wavfile" -o "$oggfile" -b $bitrate
            fi

        fi

# CLEAN UP TEMP FILES AND OPTIONALLY DELETE ORIGINAL MP3

                if [ "$mp3del" = "y" ] ; then
                    rm -f "$file" "$wavfile"
                else
                    rm -f "$wavfile"
                fi
        fi
}

##### END FUNCTIONS

##### BEGIN MAIN SCRIPT

# TEST FOR COMMAND LINE PARAMETERS

if [ "$1" ] && [ "$1" != "-d" ] && [ "$1" != "-s" ] ; then

    for file in "$@" ; do
        help
    done

    delete_query
    detect_mp3info

    for file in "$@" ; do
        convert
    done
    exit 0
fi

# NO COMMAND LINE PARAMETERS (BESIDES "-s" or "-d")
# CONVERT ENTIRE DIRECTORY

p1=$1
p2=$2

delete_query
detect_mp3info
detect_supress

    for file in * ; do
        convert
    done
exit 0