mirror of
https://github.com/notwa/mm
synced 2024-04-25 13:03:23 -07:00
64 lines
1.7 KiB
Python
64 lines
1.7 KiB
Python
from util import *
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def try_makerom(f):
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f.seek(0)
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if f.read(12) == b'\x80\x37\x12\x40\x00\x00\x00\x0f\x80\x00\x04\x00':
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return True
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return False
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def try_dmadata(f):
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f.seek(0)
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if f.read(20) == b"\x00\x00\x00\x00\x00\x00\x10\x60\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x10\x60":
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return True
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return False
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def try_actor(f):
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f.seek(-4, 2)
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section_size = R4(f.read(4))
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file_size = f.tell()
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if section_size > 0x4000 or section_size == 0:
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# assume this section isn't larger than 16KiB
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# (that's 4 times larger than the largest one in OoT)
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return False
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f.seek(-section_size, 2)
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section_start = f.tell()
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if section_start + 12 >= file_size:
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return False
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data_offset = R4(f.read(4))
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data_size = R4(f.read(4))
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misc_size = R4(f.read(4))
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if section_start == data_offset + data_size + misc_size:
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return True
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return False
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def try_scene_or_room(f, bank=2):
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# note: doesn't detect syotes_room_0 because it's missing a header
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f.seek(0)
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while True:
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command = f.read(8)
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if len(command) == 0:
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return False
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if command[2:4] != b'\x00\x00':
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return False
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if command[0] > 0x1e:
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return False
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if command[4] != bank and command[4] != 0x00:
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if command[0] not in (0x05, 0x10, 0x11, 0x12):
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return False
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if command == b'\x14\x00\x00\x00\x00\x00\x00\x00':
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return True
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def detect_format(f, fn=None):
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if try_makerom(f):
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return None
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if try_dmadata(f):
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return None
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if try_actor(f):
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return 'actor'
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if try_scene_or_room(f, 2):
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return 'scene'
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if try_scene_or_room(f, 3):
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return 'room'
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return None
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