#!/bin/bash
#
# converts seconds to minutes, seconds and CD frames (for burning CDs with a cue file from Audacity label track)
# and converts Audacity label file to cue sheet
# 
# Sunday 29 May 2011  1:48pm
# Prickle-Prickle, the 3rd day of Confusion in the YOLD 3177
#
# written by DJ Kaboodle - http://www.djkaboodle.co.uk
#
#
# programs needed to run this script: zenity, tr, cut, bc, special supplemental bc file, sed

# the following line allows spaces to be used in filenames
IFS=$'\t\n'

for direct in `find -iname 'labels.txt' -printf '%h\n' > folderstemp.txt; cat folderstemp.txt |  sort -u`; do

curdirect=`pwd`; 
cd "$direct"; 
echo "$direct"; 


# album information
performer=`zenity --entry --entry-text="" --text="enter ALBUM artist/performer here:"`
albumtitle=`zenity --entry --entry-text="" --text="enter ALBUM title here:"`
soundfile=`ls *.wav`

# Maybe change above in case more than one wav file is found, and offer user a selection from a file list.

echo "PERFORMER \"$performer\"" | cat > "${soundfile%%.*}.cue";
echo "TITLE \"$albumtitle\"" | cat >> "${soundfile%%.*}.cue";
echo "FILE \"$soundfile\" WAVE" | cat >> "${soundfile%%.*}.cue";

# change this number if wanting to start audio tracks with '00' or something else
tracknum=01;

	while read line; do

decseconds=`echo "$line" | cut -f1 |  tr -d [:blank:]`;

labeltitle=`echo "$line" | cut -f3`;


# Might need to change the 'cut' delimiter below to something else for song names containing a tilde (~)?

# track information
artist=`echo "$labeltitle" | cut -d "~" -f1 | sed 's/^[ \t]*//;s/[ \t]*$//'`;

songtitle=`echo "$labeltitle" | cut -d "~" -f2-20 | sed 's/^[ \t]*//;s/[ \t]*$//'`;

echo "  TRACK $tracknum AUDIO" | cat >> "${soundfile%%.*}.cue";
echo "    PERFORMER \"$artist\"" | cat >> "${soundfile%%.*}.cue";
echo "    TITLE \"$songtitle\"" | cat >> "${soundfile%%.*}.cue";


minutes=`echo "floor($decseconds/60)" | bc ~/bc | sed -e 's/^\([0-9]\)$/0\1/'`;

tempseconds=`echo "scale=9; ($decseconds/60)" | bc | cut -d "." -f2 | sed -e 's/^/\./g'`;


seconds=`echo "floor($tempseconds*60)" | bc ~/bc | sed -e 's/^\([0-9]\)$/0\1/'`;

tempframes1=`echo "scale=9; ($tempseconds*60)" | bc | cut -d "." -f2 | sed -e 's/^/\./g'`;

# the calculation below ensures that the number is always rounded to the nearest integer - without adding 0.5, it will not round anything of 0.6 up to 1, which is needed for this to work; 'scale=18' ensures there are 18 places to the right of the decimal point, for complete accuracy

tempframes2=`echo "scale=18; ($tempframes1/0.013333333333333333)+0.5" | bc`;
frames=`echo "floor($tempframes2)" | bc ~/bc | sed -e 's/^\([0-9]\)$/0\1/'`;

indextime=`echo "$minutes:$seconds:$frames"`;

echo "    INDEX 01 $indextime" | cat >> "${soundfile%%.*}.cue";

tracknum=$[tracknum+1];

# end of while loop
	done <labels.txt

cd "$curdirect";

done