#! /bin/sh
#
# This script uses sox

$(which soxi > /dev/null)
if [ $? -ne 0 ]; then
	echo "Error: this script requires the sox program to work."
	exit 2
fi

if [ $# -ne 2 ]; then
	echo Usage:
	echo $0 source_data_root_dir dest_data_root_dir
	echo Copy files from the PCM mod pack and convert them to lower case
	echo "source_data_root_dir = case-sensitive path to the data folder in the mod pack E.g /tmp/PCM/data"
	echo "dest_data_root_dir = path to the data folder on your system e.g \$HOME/ja2/data"
	exit 1
fi

# Path to the root folders (remove trailing '/')
src_data=$(echo $1 | sed -e 's#/$##')
dst_data=$(echo $2 | sed -e 's#/$##')

# Exit if the source root dir doesn't exist
if (! test -d $src_data); then
	echo "Error: Source data tree \"$src_data\" doesn't exist."
	exit 2
fi

# Exit if the destination root dir doesn't exist
# It should be where the game data is installed system-wide
# or the user's root dir for ja2
if (! test -d $dst_data); then
	echo "Error: destination root tree \"$dst_data\" doesn't exist."
	exit 2
fi

audio_count=0
ms_count=0

for src_file in $(find $src_data -iname '*88*'); do
	# Build the destination file name
	# And convert it to lower case
	tmp=$(echo $src_file | sed -e s#$src_data#$dst_data#)
	dst_file=$(echo $tmp | tr [:upper] [:lower])

	# Create the destination folder if it doesn't exist
	dst_dir=$(dirname $dst_file)	
	(! test -d $dst_dir) && (mkdir --parents $dst_dir || exit 2)

	# Copy the file
	#
	
	encoding=$(soxi -V0 -e $src_file)
	if test $? -ne 0; then
		# the file is not a sound file. Copy it
		cp -a --force $src_file $dst_file || exit 2
		echo $dst_file
	else
		# Sound file.
		audio_count=$(expr $audio_count + 1)
		# Convert it to IMA ADPCM if it is a MS ADPCM encoding
		if test "$encoding" = "MS ADPCM"; then
			ms_count=$(expr $ms_count + 1)
			sox -V0 $src_file -e ima-adpcm $dst_file || exit 2
			echo "$dst_file converted to ima-adpcm encoding"
		else
			# copy it
			cp -a --force $src_file $dst_file || exit 2
			echo $dst_file
		fi
	fi
done


echo "
Success"
echo "$ms_count / $audio_count audio files were converted from Microsoft ADPCM encoding."

$ chmod +x fetch_maria.sh

$ ./fetch_maria.sh $HOME/games/ja2/mods/PCM/pcm/data $HOME/games/ja2/install/data

Success
56 / 64 audio files were converted from Microsoft ADPCM encoding.