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add actor file heuristics

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This commit is contained in:
Connor Olding 2016-02-02 05:29:57 -08:00
parent 2a7310c344
commit 17453757e4
1 changed files with 16 additions and 4 deletions
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20
heuristics.py
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@ -1,3 +1,5 @@
from util import *
def try_makerom(f):
f.seek(0)
if f.read(12) == b'\x80\x37\x12\x40\x00\x00\x00\x0f\x80\x00\x04\x00':
@ -11,10 +13,20 @@ def try_dmadata(f):
return False
def try_actor(f):
# actors are just object files really,
# so anything we can detect with
# would just detect code or inconsistent data.
# maybe there's some common-looking function between them.
f.seek(-4, 2)
section_size = R4(f.read(4))
file_size = f.tell()
if section_size > 0x4000 or section_size == 0:
# assume this section isn't larger than 16KiB
# (that's 4 times larger than the largest one in OoT)
return False
f.seek(-section_size, 2)
section_start = f.tell()
data_offset = R4(f.read(4))
data_size = R4(f.read(4))
misc_size = R4(f.read(4))
if section_start == data_offset + data_size + misc_size:
return True
return False
def try_scene_or_room(f, bank=2):