#!/bin/bash

NUMBER_OF_TRACKS=1
TRACK_NUMBER=1
SOURCE=/dev/cdrom
HELP=0
KEEP=0
WAVONLY=0

if ps | grep lame 2>&1> /dev/null; then killall lame; fi

if [ "$1" = "-h" ] || [ "$1" = "-help" ]; then HELP=1; fi
if [ "$1" = "-keep" ] || [ "$2" = "-keep" ] ; then KEEP=1; fi
if [ "$1" = "-wavonly" ] || [ "$2" = "-wavonly" ] ; then KEEP=1; WAVONLY=1; fi
#echo Debugging message: \$HELP=$HELP
#echo Debugging message: \$KEEP=$KEEP
#echo Debugging message: \$WAVONLY=$WAVONLY

if [ $HELP = 1 ]
then echo "     \"rip\" the cd ripping program - extracts audio tracks from an audio CD"
     echo "      and compresses them to mp3 files"
     echo
     echo "     Usage: rip [ -help -keep -wavonly ]"
     echo "     -help:    Show this usage message and exit"
     echo "     -keep:    Keep .wav format files in seperate wav directory"
     echo "     -wavonly: Extract tracks to uncompressed .wav files only, do not compress"
     exit 0
fi


# Count and report number of audio tracks on current disk.
  while cdparanoia -d $SOURCE -Q 2>&1 | grep " $NUMBER_OF_TRACKS. " #>/dev/null; 
    do NUMBER_OF_TRACKS=$(($NUMBER_OF_TRACKS + 1));
  done

  NUMBER_OF_TRACKS=$(($NUMBER_OF_TRACKS -1 ))
  echo
    if [ $NUMBER_OF_TRACKS = 0 ];
    then echo There are no audio tracks on this CD, or disk not found.
    else echo There are $NUMBER_OF_TRACKS audio tracks on this CD.
    fi
  echo
  if [ "$1" = "-check" ] || [ "$1" = "-Check" ]; then exit 1; fi
  if [ $NUMBER_OF_TRACKS = 0 ]; then exit 1; fi
  echo continuing ...; echo


while [ $TRACK_NUMBER -le $NUMBER_OF_TRACKS ];
do

   #Pad with leading zeros so sort order == album order
    if [ $TRACK_NUMBER -le 9 ];
      then TRACK_NO=0$TRACK_NUMBER;
      else TRACK_NO=$TRACK_NUMBER;
    fi;

    cdparanoia -d $SOURCE $TRACK_NUMBER $TRACK_NO.wav

   # In case disk space usage is an issue there's no point in letting cdparanoia
   # get more than one track ahead of lame. Thiss assumes that the compression
   # is much slower than the wav ripping. None of this pertains if you are 
   # keeping the wave files, for instace to make another CD.
  while ps | grep lame 2>&1> /dev/null; do sleep 5 ; done
    if [ $KEEP = 0 ] 
    then rm $PREV_TRACK.wav
    fi

    if [ $WAVONLY = 0 ]
    then  echo Encoding $TRACK_NO.wav --\> $TRACK_NO.mp3; echo
          lame -quiet $TRACK_NO.wav $TRACK_NO-.mp3 2>/dev/null &
    fi

    PREV_TRACK=$TRACK_NO
    TRACK_NUMBER=$(($TRACK_NUMBER + 1 ));
done
if [ $KEEP = 0 ]; then rm $PREV_TRACK.wav; fi