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ntr_twl_srl: improve banner size calculation

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xprism1 2024-08-19 00:33:22 +08:00
parent 7a9928b6e7
commit 5e78a74736
1 changed files with 28 additions and 8 deletions
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36
lib/ntr_twl_srl.py
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@ -365,14 +365,34 @@ class SRLReader:
with open(file, 'rb') as f:
f.seek(self.hdr.banner_offset)
ver = readle(f.read(2))
banner_sizes = { 0x0001: 0x0840,
0x0002: 0x0940,
0x0003: 0x1240,
0x0103: 0x23C0 }
if self.hdr.unit_code == 0:
size = banner_sizes[ver]
elif self.hdr.unit_code == 2 or self.hdr.unit_code == 3:
size = self.hdr_ext.banner_size
calc_banner_size = False
banner_sizes = { 0x0001: 0x0840,
0x0002: 0x0940,
0x0003: 0x1240,
0x0103: 0x23C0 }
if self.hdr.unit_code == 0:
if ver in banner_sizes.keys():
size = banner_sizes[ver]
if ver == 0x0003:
f.seek(self.hdr.banner_offset + size - 1)
if f.read(33) != b'\x00' + b'\xFF' * 32:
calc_banner_size = True
else:
calc_banner_size = True
elif self.hdr.unit_code == 2 or self.hdr.unit_code == 3:
size = self.hdr_ext.banner_size
# Calculate banner size manually (need to do this for some NTR games)
if calc_banner_size:
f.seek(self.hdr.banner_offset)
banner = f.read(0x1240)
off = banner[0x240:].find(b'\xFF' * 32) # Find the padding after the end of the banner
if off == -1: # Can't determine
size = 0x1240
else:
size = off + 0x240
files['banner.bin'] = {
'name': 'Banner',
'offset': self.hdr.banner_offset,