Extracts all sound effect files for Animal Crossing New Horizons

bwavbarextract.py

# Extracts .bars files (like in Animal crossing New Horizons) into .bwav files
# (These are for sound effects)
# Place in your /Sound/Resource folder, it will then convert all the .bars files to .bwav files (output to /output_bwav)
# run with "python .\bwavbarextract.py"
# Tested with Python 3.8.2 on Windows 10
# By Valer (3/May/2020) (valmcc)
import glob
import os
import re
bars_list = glob.glob('./*.bars')
list_len = len(bars_list)
print(list_len,"bars files to convert...")
output_folder = "output_bwav"
print ("outputting to", output_folder)

BWAV_search_bytes = b'\x42\x57\x41\x56'

i = 1
for filename in bars_list:
    # open file
    print('File',i,"/",list_len,' converting bars file:',filename)
    with open(filename, 'rb') as f:
        bars = f.read()
    # how many bwavs are in there in this bar file?
    # search for all occurances of the search bytes
    matches = []                
    curpos = 0 
    pattern = re.compile(BWAV_search_bytes)  
    while True:
        m = pattern.search(bars[curpos:]) 
        if m is None: break                 
        matches.append(curpos + m.start()) 
        curpos += m.end() 
    # for each of these matches extract a bwav   
    matches = [None, *matches, None]
    print(len(matches),"bwavs found inside bars file...")
    bwav_no = 0
    for prev, cur, nxt in zip(matches, matches[1:], matches[2:]):
        output = bars[cur:nxt]
        output_filename = filename[:-5]
        try:
            os.mkdir("./" + output_folder)
        except:
            pass
        output_filepath = "./" + output_folder + "/" + output_filename[2:] + "_" + str(bwav_no)
        with open(output_filepath+".bwav", "wb") as f:
            f.write(output) 
        bwav_no += 1
    i += 1
print('Done! Press Enter to exit.')
input()