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bxaimc, posted Mon Jun 04, 2018 5:47 am (35562)

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Hi, Monster Hunter: World contains 3 large .bin archives called chunk0-ps4 (2.79GB), chunk1-ps4 (3.54GB), chunk2-ps4 (6.88GB)

Would anyone mind taking a look at this? Here's a sample snippet from chunk0:

https://drive.google.com/open?id=19H6LLyhEtwcpwyuZY5XSeMntAM7JNgWs

Thanks!

aluigi, posted Mon Jun 04, 2018 11:33 am (35575)

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The good news is that I have the script while the bad news is that the compression algorithm seems oodle (0x8c) but it's something different.
Additionally the non-compressed files are just garbage.

I leave the work-in-progress script in case someone needs it for studying the format and algorithm (which means DO NOT USE IT!!!):

Code:

comtype oodle   # ???

callfunction QUICKBMS_4GB_CHECK 1
idstring "CMP\0"
get FILES long
for i = 0 < FILES
    int FLAGS:2
    int SIZE:22
    int OFFSET:40
    putarray 0 i FLAGS
    putarray 1 i SIZE
    putarray 2 i OFFSET
next i

sortarray 2 1

for i = 0 < FILES
    getarray FLAGS  0 i
    getarray SIZE   1 i
    getarray OFFSET 2 i
    math i   1
    getarray ZSIZE  2 i
    math ZSIZE - OFFSET

    if FLAGS & 2
        clog "" OFFSET ZSIZE SIZE
    else
        log  "" OFFSET ZSIZE
    endif
next

startfunction QUICKBMS_4GB_CHECK
    math TMP64 = 0x10000000
    math TMP64 * 16
    if TMP64 == 0
        print "you must use quickbms_4gb_files.exe with big archives"
        cleanexit
    endif
endfunction

bxaimc, posted Mon Jun 04, 2018 2:48 pm (35582)

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Thanks! Now to play the waiting game :3