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parse-brlyt.py
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parse-brlyt.py
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import sys, struct, re
from ethyl import *
def main():
if len(sys.argv) != 2:
print 'Usage: python parse-brlyt.py something.brlyt'
sys.exit(1)
f = open(sys.argv[1], 'rb')
rlyt = f.read()
f.close()
assert rlyt[0:8] == 'RLYT\xfe\xff\x00\x08'
offs, nel = struct.unpack('>hh', rlyt[0xc:0x10])
ch = iff_to_chunks(rlyt[offs:])
assert len(ch) == nel
indentlevel = 0
for typ, chunk in ch:
print ' ' * indentlevel + open_paren(typ), #+ ' ' + hex(len(chunk))
vars = None
if typ in ('pic1', 'pan1', 'bnd1', 'wnd1', 'txt1'):
vars, pos = parse_data(chunk, 'pane')
assert chunk[:pos] == unparse_data(vars, 'pane') # for testing
if typ == 'txt1':
vars2, pos = parse_data(chunk[pos:], 'text', '~text')
os = vars2['~text.name_offs'] - 8
txt = chunk[os:os + vars2['~text.len2']]
vars2['~text.text'] = unicode(txt, 'utf_16_be').rstrip('\x00')
vars2['~text.material'] = materials[vars2['~text.mat_off']]
vars.update(vars2)
#print vars['~text.cnt2'], len(vars2['~text.text']), len(txt), repr(txt)
elif typ == 'pic1':
vars2, pos = parse_data(chunk, 'pic', prefix='~pic', start=pos)
vars2['~pic.material'] = materials[vars2['~pic.mat_off']]
vars2['~pic.texcoords'] = []
for n in xrange(vars2['~pic.num_texcoords']):
vars2['~pic.texcoords'].append(struct.unpack('>ffffffff', chunk[pos:pos+0x20]))
pos += 0x20
assert pos == len(chunk)
vars.update(vars2)
elif typ == 'lyt1':
vars = parse_data(chunk, 'lytheader')
elif typ == 'grp1':
vars, pos = parse_data(chunk, 'group')
vars['subs'] = []
for n in xrange(vars['numsubs']):
vars['subs'].append(nullterm(chunk[pos:pos+16]))
pos += 16
elif typ in ('txl1', 'fnl1'):
things = {'txl1': 'textures', 'fnl1': 'files'}[typ]
vars, pos = parse_data(chunk, 'numoffs')
vars[things] = []
pos += vars['offs']
bpos = pos
del vars['offs'] # unneeded
for n in xrange(vars['num']):
offset, unk = struct.unpack('>II', chunk[pos:pos+8])
name = nullterm(chunk[offset + bpos:])
vars[things].append({'name': name, 'unk': unk})
pos += 8
if typ == 'txl1':
textures = vars['textures']
elif typ == 'mat1':
vars, pos = parse_data(chunk, 'numoffs')
vars['materials'] = []
pos += vars['offs']
bpos = pos
del vars['offs']
materials = []
for n in xrange(vars['num']):
offset, = struct.unpack('>I', chunk[pos:pos+4])
mat, mpos = parse_data(chunk, 'material', start = offset - 8)
#vars['materials'].append(mat)
flags = mat['flags']
materials.append(mat['name'])
assert mpos == 0x40 + offset - 8
#print hex(struct.unpack('>I', chunk[mpos:mpos+4])[0])
# I believe material is:
# 0x40, followed by
# 4 * flags[28-31], followed by
mat['texref'], mpos = get_array(chunk, mpos, bit_extract(flags, 28, 31), 4, 'texref')
for a in mat['texref']:
a['tex'] = textures[a['tex_offs']]['name']
# 0x14 * flags[24-27], followed by
mat['ua2'], mpos = get_array(chunk, mpos, bit_extract(flags, 24, 27), 0x14, 'ua2')
# 4*flags[20-23], followed by
mat['ua3'], mpos = get_array(chunk, mpos, bit_extract(flags, 20, 23), 4, '4b')
# Changing ua3 things
# 1st --> disappears.
# 2nd --> no visible effect.
# 3rd --> disappears.
# 4th --> no visible effect.
# 4 * flags[6]
mat['ua4'], mpos = get_opt(chunk, mpos, bit_extract(flags, 6), 4, '4b')
# 4 * flags[4]
mat['ua5'], mpos = get_opt(chunk, mpos, bit_extract(flags, 4), 4, '4b')
# 4 * flags[19]
mat['ua6'], mpos = get_opt(chunk, mpos, bit_extract(flags, 19), 4, '4b')
# 0x14 * flags[17-18]
mat['ua7'], mpos = get_array(chunk, mpos, bit_extract(flags, 17, 18), 0x14, 'ua7')
# 4 * flags[14-16]
mat['ua8'], mpos = get_array(chunk, mpos, bit_extract(flags, 14, 16), 4, '4b')
# 0x10 * flags[9-13]
mat['ua9'], mpos = get_array(chunk, mpos, bit_extract(flags, 9, 13), 0x10, '10b')
# 4 * flags[8], these are bytes btw
mat['uaa'], mpos = get_opt(chunk, mpos, bit_extract(flags, 8), 4, '4b')
# 4 * flags[7]
mat['uab'], mpos = get_opt(chunk, mpos, bit_extract(flags, 7), 4, '4b')
if n < vars['num'] - 1:
next_offset, = struct.unpack('>I', chunk[pos+4:pos+8])
if next_offset - 8 != mpos:
mat['~_insane'] = next_offset - 8 - mpos # Extra shit we didn't parse :(
mat['unk_bit_5'] = bit_extract(flags, 5)
mat['unk_bits_0_3'] = bit_extract(flags, 0, 3) # Overwritten by stuff
vars['materials'].append(mat)
pos += 4
elif typ in ('grs1', 'pas1'):
indentlevel += 1
elif typ in ('gre1', 'pae1'):
indentlevel -= 1
else:
print 'Unhandled type %s' % typ
print repr(chunk)
if vars: pr_dict(vars, ' ' * indentlevel + ' ')
print close_paren(typ, indentlevel)
#print hex(len(ch))
def open_paren(typ):
if typ in ('grs1', 'pas1'):
return "'" + typ + "'"
elif typ in ('gre1', 'pae1'):
return "'" + typ + "'"
else:
return "('" + typ + "',\n"
def close_paren(typ, indentlevel):
if typ in ('grs1', 'pas1'):
indentlevel -= 1
return ','
elif typ in ('gre1', 'pae1'):
indentlevel += 1
return ','
return ' ' * indentlevel + ") ,"
if __name__ == "__main__":
print '['
main()
print ']\n'