Fix pirated PlayStation 1 BIN for OpenEmu, Mednafen | Исправление пиратских PlayStation 1 дисков для запуска на эмуляторах [ PSX, PS1, PSOne ]

psx_fix_license.py

#!/usr/bin/env python3
"""Fix pirated PlayStation 1 BIN for OpenEmu, Mednafen

usage:
  script.py Image.bin [0|1|2]
  0 - Japan, 1 - USA, 2 - Europe. Default: 1
examples:
  script.py "Chrono Cross (USA) (Disc 1).bin"
  script.py "Chrono Cross (USA) (Disc 1).bin" 1
  script.py "Sexy Parodius (Japan).bin" 0

after:
  CDmage. Action > Scan For Corruption & Action > Rebuild Sector Fields
"""
import sys

LIC_OFFSET = 0x24E0

licenses = (
    b"  Licensed  by          Sony Computer Entertainment Inc.\x0A00000",
    b"  Licensed  by          Sony Computer Entertainment Amer  ica ",
    b"  Licensed  by          Sony Computer Entertainment Euro pe   "
)

lic_index = 1
if len(sys.argv) > 2:
    lic_index = int(sys.argv[2])
lic = licenses[lic_index]

with open(sys.argv[1], "r+b") as f:
    f.seek(LIC_OFFSET)
    prev = f.read(len(lic))
    print("Previous (0x{:X}): {}".format(LIC_OFFSET, prev))

    f.seek(LIC_OFFSET)
    f.write(lic)

print("Done")