G1lExtract

import sys
import os
import struct

def readu32(file, le=True):
    if le:
        return struct.unpack("<i", file.read(4))[0]
    else:
        return struct.unpack(">i", file.read(4))[0]



g1l = open(sys.argv[1], 'rb')
fourcc = g1l.read(4)
if fourcc == "_L1G":
    le = True
else:
    le = False
g1l.seek(8)
ext = ".g1l"
fullSize = readu32(g1l, le)
headerSize = readu32(g1l, le)
codec = readu32(g1l, le)
fileCount = readu32(g1l, le)
for i in range(fileCount):
    g1l.seek(0x18+i*4)
    print(hex(g1l.tell()))
    fileOffset = readu32(g1l, le)
    g1l.seek(fileOffset)
    header = g1l.read(4)
    if header == "RIFF":
        fileSize = readu32(g1l) + 8
        ext = ".at3"
    elif header == "WiiB":
        g1l.seek(0x18,1)
        channelSize = readu32(g1l, False)
        channelCount = readu32(g1l, False)
        ext = ".wiibgm"
        fileSize = channelCount * channelSize + 0x800
    elif header == "WiiV":
        g1l.seek(0xc,1)
        fileSize = readu32(g1l, False)
        print("WiiVoice - size %s" % hex(fileSize))
        ext = ".wiivoice"
    else:
        print ("Unknown file type %s" % (header))
        continue
    g1l.seek(fileOffset)
    fileName = os.path.splitext(sys.argv[1])[0] + "_%04d%s" % (i, ext)
    outFile = open(fileName, 'wb')
    if ext == ".g1l":
        outFile.write("G1L_0000" + struct.pack(">I", 0x1c + fileSize) + struct.pack(">I", 0x1c) + struct.pack(">I", codec) + struct.pack(">I", 1) + struct.pack(">I", 0x1c))
    outFile.write(g1l.read(fileSize))
    outFile.close()
   #print("Wrote %s" % (fileName))
g1l.close()