alytDumper.py v1.0

gistfile1.txt

"""
*   alytDumper.c
*       by Reisyukaku
*       translated to python by hillexed
*
*   Dumps media from GameFreak's ALYT format.


"""
version = 1.1

import sys

def getUnsignedBytes(bytestring, offset, numBytes=4):
    return int.from_bytes(bytestring[offset:offset+numBytes],byteorder='little')

def main():
    if(len(sys.argv) != 2):
        print("Usage: %s <alyt file>\n" % sys.argv[0])
        return 1

    with open(sys.argv[1],'rb') as fp:
        fileBuf = fp.read()

    fileSize = len(fileBuf)
   
    if(fileBuf[0:4] != b'ALYT'):
        return 1
   
    ltblOff = getUnsignedBytes(fileBuf,0x8,4)
    lmtlOff = getUnsignedBytes(fileBuf,0x10,4)
    lfnlOff = getUnsignedBytes(fileBuf,0x18,4)
    ltblSize = getUnsignedBytes(fileBuf,0xC,4)
    lmtlSize = getUnsignedBytes(fileBuf,0x14,4)
    lfnlSize = getUnsignedBytes(fileBuf,0x1C,4)

    symbolTbl = getUnsignedBytes(fileBuf,0x20,4)
    numOfEntries = getUnsignedBytes(fileBuf,symbolTbl,4)
    print(
"""ALYT parser\n
-----------\n
Entries: %d\n\n""" %  numOfEntries
        )
       
    for i in range(numOfEntries):
        #I haven't found a good way to say 'keep printing till you hit a null terminator
        #C, you've got me there
        currentByteCounter = symbolTbl+4+(i*0x40) #start point
        filename = ""
        while fileBuf[currentByteCounter] != 0x00:
            filename += chr(fileBuf[currentByteCounter])
            currentByteCounter += 1
        print(filename)

    return 0

main()