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GoStorm2_008, posted Sun Sep 27, 2020 8:30 pm (58910)

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Hello. I am trying to extract the game files for MotorStorm, and when I looked at the file directory, everything is stored in cache_ps3.dat along with cache_ps3.bin, and cache_ps3.cnk (the latter two being very small in size while the main .dat file is 1.44GB). I'm not too sure about any specifics of it however when I open the file in HxD it stated to be "auto-generated by GoStorm2, which I assume is proprietary software from evolution studios (now defunct). If anyone could help me extract these files I would greatly appreciate it.

aluigi, posted Sat Oct 10, 2020 11:53 am (59203)

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Files?

GoStorm2_008, posted Sat Oct 10, 2020 1:17 pm (59221)

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[cache_ps3.dat][https://drive.google.com/file/d/1wO7ovPZ5IFDY7aDocPGauEBhAFNtS-AV/view?usp=sharing]
. here

aluigi, posted Sat Oct 10, 2020 10:46 pm (59241)

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I guess the data is compressed based on the two fields and flags available but no idea what may be the algorithm.
Additionally they are chunks but the following script is just an experiment that dumps them as-is as separate files:

Code:

endian big

open FDDE "cnk"
open FDDE "dat" 1

math OFFSET = 0
get FILES long
for i = 0 < FILES
    get SIZE long

    goto OFFSET 1
    idstring 1 "RA"
    get DUMMY short 1   # 5
    get XSIZE long 1    # uncompressed size?
    get SIZE long 1
    get FLAGS long 1    # 0 for compressed and 0x10000 for uncompressed?
    savepos OFFSET 1
    log "" OFFSET SIZE 1

    math OFFSET   SIZE
next i

/*
open FDDE "bin" 2
for i = 0 < FILES
    get DUMMY long 2
    get DUMMY long 2
next i
*/

GoStorm2_008, posted Sat Oct 10, 2020 11:11 pm (59242)

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Hm okay I will try this out. Is this final? Regardless, thank you for looking at it

aluigi, posted Sun Oct 11, 2020 9:07 am (59247)

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Only for testing because the extracted files are totally useless.

GoStorm2_008, posted Sun Oct 11, 2020 1:56 pm (59261)

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Ohh okay. That's true. Take your time

GoStorm2_008, posted Mon Jun 28, 2021 7:01 pm (64963)

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Any updates on the script?

aluigi, posted Mon Sep 13, 2021 6:34 pm (66344)

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Eh no, I don't work on it.