Extract music/audio from 'Bully: Scholarship Edition' on PC.

bully-music-extractor.sh

#!/bin/bash

# Copyright (c) 2022 Gonçalo Baltazar <[email protected]>
# MIT License

# Extract music/audio from 'Bully: Scholarship Edition' on PC.
# This script expects the game to be installed on Linux using Steam.

# Use Proton to install Bully on Steam, then run the script:
# - Open the game properties
# - Select "COMPATIBILITY"
# - Select "Force the use of a specific Steam Play compatibility tool"
# - Install the game and wait for the download to complete
# - Run the script
# - Enjoy the awesome soundtrack

# Creates 2 directories 'aluigi' (extraction tools) and 'bully' (extracted music).

set -euo pipefail
cd -- "$(dirname -- "$0")"

# set to 1 for verbose extraction
DEBUG=
# set to 1 to extract all audio files, not just music
EXTRACT_ALL=
# bully files location
BULLY_FILES="$HOME/.steam/debian-installation/steamapps/common/Bully Scholarship Edition"

if [ ! -d "$BULLY_FILES" ]; then
    echo "'Bully: Scholarship Edition' installation not found"
    echo "expected game files at '$BULLY_FILES'"
    exit 1
fi

show_debug() {
    if [ -n "$DEBUG" ]; then cat
    else cat >/dev/null; fi
}

echo "downloading and compiling dependencies..."

# download quickbms and unxwb
(
    mkdir -p aluigi
    cd aluigi
    # https://aluigi.altervista.org/quickbms.htm
    [ -f quickbms_linux.zip ] || curl -ROL https://aluigi.altervista.org/papers/quickbms_linux.zip
    [ -d quickbms_linux ] || unzip -d quickbms_linux quickbms_linux.zip
    chmod +x quickbms_linux/quickbms
    # https://aluigi.altervista.org/papers.htm
    [ -f unxwb.zip ] || curl -ROL https://aluigi.altervista.org/papers/unxwb.zip
    [ -d unxwb ] || unzip -d unxwb unxwb.zip
)

# compile unxwb
(
    cd aluigi/unxwb
    # http://blog.ssokolow.com/archives/2014/04/21/extracting-music-from-xwb-files-on-linux/
    # https://gist.github.com/ssokolow/11149295
    [ -f Makefile ] || curl -ROL https://gist.githubusercontent.com/ssokolow/11149295/raw/26e01891905917a43b90bf693356ff5473f9ec54/Makefile
    [ -f unxwb ] || make
)

mkdir -p bully/tmp
cd bully

# https://forum.xentax.com/viewtopic.php?t=25243
# https://forum.xentax.com/viewtopic.php?p=41076#p41076
[ -f tmp/bully_bin.bms ] || cat <<EOF >tmp/bully_bin.bms
open FDDE bin 0
open FDDE lst 1

idstring Hash
get FILES long

for i = 0 < FILES
	get FILEHASH long
	get OFFSET long
	get SIZE long
	getct NAME string 0x0D 1
	get TXT byte 1

	set XSBN string NAME
	string XSBN -= 4
	string XSBN += .xsb
	set XWBN string NAME
	string XWBN -= 4
	string XWBN += .xwb
	set XWBOFF long OFFSET
	math XWBOFF += 0x800
	set XWBSIZE long SIZE
	math XWBSIZE -= 0x800

	log XSBN OFFSET 0x800
	log XWBN XWBOFF XWBSIZE
next i
EOF

echo "copying osd..."
rsync -a --info=progress2 "$BULLY_FILES/Bully Original Soundtrack" .

extract_audio() {(
    cd tmp

    [ -f "$1.bin" ] || rsync -a --info=progress2 "$BULLY_FILES/audio/PLAYLIST/$1.bin" .
    [ -f "$1.lst" ] || rsync -a --info=progress2 "$BULLY_FILES/audio/PLAYLIST/$1.lst" .

    [ -d "$1" ] || (
        mkdir -p "$1"
        ../../aluigi/quickbms_linux/quickbms bully_bin.bms "$1.bin" "$1"
    ) 2>&1 | show_debug

    [ -d "$1_wav" ] || (
        mkdir -p "$1_wav"
        cd "$1"
        find -maxdepth 1 -type f -name "*.xwb" -printf "%f\n" | while IFS= read -r F; do
            ../../../aluigi/unxwb/unxwb -d "../$1_wav" -b "${F%.*}.xsb" "$F" || true
            [ ! -f "../$1_wav/00000000.wav" ] || mv "../$1_wav/00000000.wav" "../$1_wav/${F%.*}.wav"
            # TODO: some files are extracted with weird names like 'K,.wav'
            #       these get overwritten if another file has the same name
            # TODO: fix file names (are the .xwb/.xsb files bad?)
        done
    ) 2>&1 | show_debug
    # XXX: something is not totally right the extraction, many files show
    #      the error 'the file contains unexpected data' while extracting
    #      but still appear to produce a valid .wav file
)}

echo "extracting audio..."
[ -z "$EXTRACT_ALL" ] || extract_audio Ambs
[ -z "$EXTRACT_ALL" ] || extract_audio Cuts
extract_audio Music
[ -z "$EXTRACT_ALL" ] || extract_audio Speech

echo "collecting extra music..."
mkdir -p "Bully Extra Music"
find ./tmp/Music_wav -type f -name "*.wav" -size +1M -print0 | xargs -0 cp -at "Bully Extra Music"

echo "'extra music' are just '.wav files larger than 1M'"
echo "for all extracted files see 'tmp' directory"

echo "done"