#!/bin/sh

# Written by David Ranch
# 06/26/01 - v1.00
#
# http://rocko.csuchico.edu/~dranch/tivo/index.html

# Assumptions:
#
#   1) the media files are in the current directory
#
#   2) all tools like mpeg2dec, mpeg2enc, toolame, vdimager, and cdrdao are also
#      in the current directory
#
#   3) You have bash, awk, bc, sox's play, and mpg123 in your PATH
#
#   4) You have the various KDE sound files installed
#
#   5) You need to change the device number for your CDR drive and the correct
#      speed.  I recommend that you use CD-R/W disks until you confirm that
#      you have a perfect mpeg1 file
#

# Notes:  Please note that ANY "Sequence number bogus" or "audio failure" errors from
#         ExtractStream can cause a fatal timing issue between the video and audio
#         playback.  You've been warned.  
#


if [ "$1" == "" ]; then
  echo -e "\n Usage: convert-it <filename without any file extension>"
  exit 0
fi

echo -e "\nConverting $1 media..\n"

#If the m1a file not present or if the existing m1a file is less than 20M.. abort
TEMP=`ls -la $1.m1a 2> /dev/null | awk '{print $5}'`
if [ ! -f $1.m1a ] || [ $TEMP -lt 20000000 ]; then
   #Convert audio in background
   mpg123 -s -r 44100 --wav - $1.m2a | ./toolame -p 2 -b 224 - $1.m1a &
  else
   echo -e "$1.m1a file exists.. skipping..\n"
fi

#If the m1v file not present or if the existing m1v file is less than 200M.. abort
TEMP=`ls -la $1.m1v 2> /dev/null | awk '{print $5}'`
if [ ! -f $1.m1v ] || [ "$TEMP" == "" ] || [ $TEMP -lt 200000000 ]; then
  #Convert audio in forground as it takes the longest
  cat $1.m2v | ./mpeg2dec -o YUVh | ./mpeg2enc -s -r 16 -o $1.m1v 
  else
   echo -e "$1.m1v file exists.. skipping..\n"
fi

#Abort if the resulting .m1* files dont exist
if [ ! -f $1.m1v ] || [ ! -f $1.m1a ]; then
   play /usr/share/sounds/scream.wav
   echo -e "\n** ERROR: One of the .m1* files is missing.. Aborting muxing.\n"
   exit 0
fi

#If an mpeg1 already exists, make sure its big enough, if not, overwrite it
TEMP=`ls -la $1.mpeg1 2> /dev/null | awk '{print $5}'`
if [ "$TEMP" == "" ] || [ $TEMP -lt 200000000 ]; then
    #Mux into a mpeg file
    echo "Determining required bitrate.."
    ./mplex -f 2 -r 1000 -m 1 -o $1.mpeg1 $1.m1[av] 2> mplex-rate.out > /dev/null
    RATE1=`grep "best-guess" mplex-rate.out | awk '{print $8}'`
    RATE=`echo "($RATE1 * .001) + 1" | bc`
    echo "Required bitrate is: $RATE"
    # A rate of 1724 is ok on a Denon 2800

    echo -e "Beginning to mux files..\n"
    ./mplex -f 2 -r $RATE -m 1 -o $1.mpeg1 $1.m1[av]
  else
   echo -e "The .mpeg1 file already exists and looks valid.\n"
fi
   

#Make sure the new mpeg1 file is ok
TEMP=`ls -la $1.mpeg1 2> /dev/null | awk '{print $5}'`
if [ "$TEMP" == "" ] || [ $TEMP -lt 200000000 ]; then
   play /usr/share/sounds/scream.wav
   echo -e "\n** ERROR: the MPEG1 file is missing or is too small.. Aborting imaging.\n"
   exit 0
  else
   echo -e "The .mpeg1 file looks valid.\n"

fi

#If an mpeg1 already exists, make sure its big enough, if not, overwrite it
TEMP=`ls -la $1.bin 2> /dev/null | awk '{print $5}'`
if [ "$TEMP" == "" ] || [ $TEMP -lt 200000000 ]; then
   #Create the VCD file
   echo -e "Creating VCD .bin and .cue file..\n"
   ./vcdimager -p --cue-file=$1.cue --bin-file=$1.bin $1.mpeg1
fi
  
    
#Make sure the .bin file is present and has a valid file size of at least 250M
TEMP=`ls -la $1.bin 2> /dev/null | awk '{print $5}'`
if [ "$TEMP" == "" ] || [ $TEMP -lt 250000000 ] || [ ! -f $1.cue ]; then
  play /usr/share/sounds/scream.wav
  echo -e "\n\n** ERROR: the .bin or .cue files are missing or is too small.  Aborting burn.\n"
  exit 0
 else 
   echo -e "The .bin file looks valid.\n"
fi

#Burn the CD
#Make sure to change the device and speed to match your hardware
echo -e "Starting the CD burning cycle..\n"
./cdrdao write --device 1,5,0 --speed 4 $1.cue 
play /usr/share/sounds/phone.wav
#eject /dev/scd1
echo -e "\nDone.\n"