scdSplit.py

# Written by soneek [github.com/soneek]
# Specifically written for Kingdom Hearts 1.5 HD ReMIX
# Not guaranteed to work elsewhere

import string
import struct
import sys

def readSeek(f, offset, size):
    f.seek(offset)
    return f.read(size)

def writeSeek(f, offset, data):
    f.seek(offset)
    return f.write(data)

if len(sys.argv) != 2:
    print "Usage:\n\t" + sys.argv[0] + " song.scd"
    sys.exit()

scd = open(sys.argv[1], "rb")
scdSize = struct.unpack(">I", readSeek(scd, 0x14, 4))[0]

trackCount = struct.unpack(">H", readSeek(scd, 0x34, 2))[0]
print trackCount
trackOffsetOffset = 0x40 + struct.unpack(">H", readSeek(scd, 0xe, 2))[0]
if trackCount > 1:
    for i in range(0, trackCount):
        trackOffset = struct.unpack(">I", readSeek(scd, trackOffsetOffset + i * 4, 4))[0]
        if i == trackCount - 1:
            trackSize = scdSize - trackOffset
        else:
            trackSize = struct.unpack(">I", readSeek(scd, trackOffsetOffset + (i+1) * 4, 4))[0] - trackOffset
        print hex(trackOffset)
        outName = string.replace(sys.argv[1], ".scd", "_" + str(i) + ".scd")
        outscd = open(outName, "wb")
        outscd.write(readSeek(scd, 0, 0x34))
        outscd.write(struct.pack(">H", 1))
        outscd.write(readSeek(scd, 0x36, 0x3a))
        outscd.write(struct.pack(">IIII", 0x80, 0, 0, 0))
        outscd.write(readSeek(scd, trackOffset, trackSize))
        trackSize = outscd.tell()
        writeSeek(outscd, 0x14, struct.pack(">I", trackSize))
        outscd.close()
scd.close()