Skip to content

Instantly share code, notes, and snippets.

Embed
What would you like to do?
Script to transform .itc files into images (JPG or PNG)
#!/bin/bash
# Script to transfort .itc files into images (JPG or PNG)
#
# .itc files are located in ~/Music/iTunes/Album Artwork
#
# This script uses (/!\ needs ) ImageMagick's convert, hexdump, printf and dd.
#
# This script might be a little slow, You might want to look at Simon Kennedy's work at http://www.sffjunkie.co.uk/python-itc.html
AlbumArtwork="${HOME}/Music/iTunes/Album Artwork"
DestinationDir="$AlbumArtwork/Images"
IFS=$'\n'
if [ ! -d "$DestinationDir" ]; then
mkdir "$DestinationDir"
echo "new Images dir"
fi
for file in `find "$AlbumArtwork" -name '*.itc'`; do
start=0x11C
exit=0;
i=1;
echo $file
while [ 1 ]; do
typeOffset=$(($start+0x30))
imageType=$(hexdump -n 4 -s $typeOffset -e '"0x"4/1 "%02x" "\n"' $file)
#If there is no next byte, jump to the next itc file.
if [[ -z $imageType ]]; then
break
fi
imageOffsetOffset=$(($start+8))
itemSize=$(hexdump -n 4 -s $start -e '"0x"4/1 "%02x" "\n"' $file)
imageOffset=$(hexdump -n 4 -s $imageOffsetOffset -e '"0x"4/1 "%02x" "\n"' $file)
imageStart=$(($start+$imageOffset))
imageSize=$(($itemSize-imageOffset))
imageWidth=$(hexdump -n 4 -s $(($start+56)) -e '"0x"4/1 "%02x" "\n"' $file)
imageWidth=$(printf "%d" $imageWidth)
imageHeight=$(hexdump -n 4 -s $(($start+60)) -e '"0x"4/1 "%02x" "\n"' $file)
imageHeight=$(printf "%d" $imageHeight)
dir=$(dirname "$file")
xbase=${file##*/} #file.etc
xpref=${xbase%.*} #file prefix
#echo $file
#echo itemsize $itemSize
#echo start $start
#echo imageOffset $imageOffset
#echo imageStart $imageStart
#echo imageSize $imageSize
#echo imageWidth $imageWidth
#echo imageHeight $imageHeight
if [[ $imageType -eq 0x504E4766 ]] || [[ $imageType -eq 0x0000000E ]] ; then
targetFile="$DestinationDir/$xpref-$i.png"
if [ ! -f "$targetFile" ]; then
echo PNG
dd skip=$imageStart count=$imageSize if="$file" of="$targetFile" bs=1 &> /dev/null
fi
elif [[ $imageType -eq 0x41524762 ]] ; then
targetFile="$DestinationDir/$xpref-$i.png"
if [ ! -f "$targetFile" ]; then
echo ARGB
dd skip=$imageStart count=$imageSize if="$file" of="$TMPDIR/test$i" bs=1 &> /dev/null
#Using a matrix to convert ARGB to RGBA since imagemagick does only support rgba input
convert -size $imageWidth"x"$imageHeight -depth 8 -color-matrix '0 1 0 0 0 0 1 0 0 0 0 1 1 0 0 0' rgba:"$TMPDIR/test$i" "$targetFile"
fi
elif [[ $imageType -eq 0x0000000D ]] ; then
targetFile="$DestinationDir/$xpref-$i.jpg"
if [ ! -f "$targetFile" ]; then
echo JPG
dd skip=$imageStart count=$imageSize if="$file" of="$targetFile" bs=1 &> /dev/null
fi
else
echo $imageType
exit=1
break;
fi
start=$(($start+$itemSize))
i=$(($i+1))
done
done
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment