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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") |
All good @Doomlazer - I'm updating these notes so I don't lose track of my findings and for you to also know when you feel up to the task but please tackle this at your discretion.
This has admittedly turned into a full blown obsession for me...still have stuff to work out that I don't fully understand but i've managed to get Peter looking a lot more like Peter. 😁
Damn, that is nearly there! Keep going!
Thank you for the encouragement, I think i'm almost there...this is insane as I've never cracked something like this before...there's no magic to it other than me tediously counting pixels, offsets and trying to figure out these damn patterns. Another thing I've been doing is reading all the variations of RLE encoding in the wild but so far nothing really seems to match up with how this game does it.
I wish there was a better way.
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!
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?
Well, that certainly gives me a lot to investigate. I never really learned C++ so it's difficult for me parse. I can usually do it though if I study the code slowly. The code mentions RLE4, so I might start by tracking down some info on BMP structures and compression.
Unfortunately, work has consumed my weekdays. I'm hoping I'm not completely exhausted again this weekend so I can follow up on these leads. Saturday will likely be a recovery day, but I'm hopeful to find some time Sunday. I'd really like to solve this if possible considering all the time we've put into it.