Created
June 28, 2024 17:34
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Extracts all .wav audio from Leisure Suit Larry Casino - originally written by @Doomlazer
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| # Original credit: @doomlazer | |
| # https://github.com/Doomlazer/TrivialQuest/blob/main/audio/jokes/ExtractWavs.py | |
| # Extract wav files from Larry's Casino audio.vol | |
| # Sound effects can also be dumped from resources.vol | |
| # jokes are 71.wav - 183.wav | |
| # | |
| # command to convert wav to mp3: | |
| # for f in *.wav; do ffmpeg -i "$f" "${f%.wav}.mp3"; done | |
| import struct | |
| AUDIO_DEST_FOLDER = "extracted_audio/" | |
| def dump_audio(from_file): | |
| fnum = 0 | |
| with open(from_file, "rb") as f: | |
| while (byte := f.read(1)): | |
| if byte == b'\x52' and f.read(1) == b'\x49' and f.read(1) == b'\x46' and f.read(1) == b'\x46': | |
| print("Found RIFF starting at: ", f.tell()-4) | |
| size = struct.unpack('<i', f.read(4))[0] | |
| print("wav size: ", size) | |
| f.seek(-8, 1) | |
| wav = f.read(size+8) | |
| s = AUDIO_DEST_FOLDER + str(fnum) + "_" + from_file + ".wav" | |
| fnum=fnum+1 | |
| nf = open(s, 'bw+') | |
| nf.write(wav) | |
| nf.close() | |
| # Extract music + sfx. | |
| dump_audio("resource.vol") | |
| # Extract cast voice audio. | |
| dump_audio("audio.vol") |
Time for a celebration: 🎊🔥⚡️🍾🚀
Still left to do:
- Try other sprites and hopefully eliminate any further edge cases
- Work on the sub-sprites (rows/columns theory) to get them to render out
- Upload to Github this code so it can be improved and shared
- Primary goal is to extract the character sprites during LC gameplay
- Secondary goals would be get all room backgrounds and GUI sprites, but I don't really need this for my poker game
I credited you because you helped get the scripts started and you were instrumental in bouncing ideas off of, so a big thank you @Doomlazer!
Grats, that's awesome! I'm excited to see the RLE algorithm.
You have to list yourself first in the credits for finally breaking it.
Thanks, here's the not-so-secret-sauce: https://github.com/deckarep/laffer-casino-extractor
@Doomlazer - would you be okay with also getting your .wav/jokes extractor in this repo for completion?
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AFAIK, that is the way all reverse engineering is done. It's a combination of research and mostly trial and error based on hunches. If it were easy, it would have already been done.
It's extremely satisfying once you crack it though. It's like finding the WOPR backdoor, only 100x better because you didn't just guess a password. Based on that last pic you are very close, though there might be more to learn about the other images in the resource.
I have a feeling you'll get it this weekend, which is very exciting!