#!/bin/csh
###############################################################
# This script watches for CD insertion.  When one is inserted,
# it does the things the musicbox should do:
#	Kills any currently-playing song
#	If the CD is already in the catalog
#		Tell the user we recognize it
#		Start playing the CD from the hard drive
#		Eject the CD
#	Otherwise
#		Start ripping the songs to a temporary dir
#		Ask the user where the songs should end up
#		
##############################################################

set device = '/dev/cdrom'

##############################################################
# Argument checking

# Make sure they passed in the name of a directory
set directory = $1
if (0 == `echo -n "$directory" | wc -c`) then
	echo "Usage: $0 directory_to_put_files_in catalog_file"
	exit 3
endif
# Make sure that the directory exists
if (-e "$directory") then
else
	echo "Error: directory $directory does not exist"
	exit 3
endif
# Make sure they passed in the name of a directory
set catalog = $2
if (0 == `echo -n "$catalog" | wc -c`) then
	echo "Usage: $0 directory_to_put_files_in catalog_file"
	exit 3
endif
# Make sure that the catalog file exists
if (-e "$catalog") then
else
	echo "Error: catalog file $catalog does not exist"
	exit 3
endif

##############################################################
# Media and existence checking

# Find out the ID of the disc that is in the CD device.
# Make sure that it is valid.
set discid = `musicbox_get_disc_id.txt`
if ( 0 != $status) then
	echo "Could not read discID from CD"
	exit 3
endif

# See if we've already read this disc (it will be in the catalog
# if so).  If so, return code 1.
set entry = `grep $discid $catalog`
if ( 0 != `echo -n $entry | wc -c` ) then
	echo "This disc has already been cataloged"
	exit 1
endif

# Check to see if there is an ID file in the directory already.
# If so, then return an error code.
if ( -e $directory/id ) then
	echo "There is already another disc in $directory"
	exit 2
endif

##############################################################
# All of the checks have been done and we're ready to do our
# thing.  Start by going into the directory that we are going
# to fill up and writing the ID file.  Then start saving the
# .wav files into that directory.

pushd $directory
echo $discid > id

# Find out how many tracks there are on the disc.  This is done
# by running cdda2wav again with the -J parameter, which
# has the side effect of creating index files for each of
# the tracks on the CD.

cdda2wav -D $device -I cooked_ioctl -v disable -J >& /dev/null
set numtracks = `ls audio_??.inf | wc -w`
echo $numtracks tracks found
if ( 0 == $numtracks ) then
	echo "Found no audio tracks on the CD"
	exit 3
endif

# Now convert each track into an MP3 file.
# Launch the play script after track one has been completed.
# Use the 'lame' program for the conversion.

set track = 1
while ( $track <= $numtracks )
	set prettytrack = $track
	if ( $track < 10 ) set prettytrack = 0$track
	# -S 0 is default (maximum) speed for the device.
	# -n 100 makes it read 100 sectors whenever it wants one
	# -l 200 creates a 200-entry circular buffer of sector storage
	# -H means no info-file
	# XXX -P 0 will fail to correct for bad reads, but is faster
	cdda2wav -D $device -I cooked_ioctl -v disable -H -t $track -P 0 -n 100 -S 0 -l 200 -Q track_$prettytrack.wav
	set cddastatus = $status
	if ( $cddastatus != 0 ) then
		echo "Error $cddastatus when trying to copy track $track"
		rm *
		exit 3
	endif
	@ track ++
end

##############################################################
# Delete the information tracks.

\rm -f audio_??.inf

##############################################################
# Put an entry into the catalog for this CD

popd
echo $discid $directory >> $catalog

exit 0