304 lines
11 KiB
Python
304 lines
11 KiB
Python
import json
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import os
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import platform
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import struct
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import subprocess
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import copy
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import threading
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from .Utils import subprocess_args, data_path, get_version_bytes, __version__
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from Utils import local_path
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from .ntype import BigStream
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from .crc import calculate_crc
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DMADATA_START = 0x7430
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double_cache_prevention = threading.Lock()
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class Rom(BigStream):
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original = None
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def __init__(self, file=None, force_use=False):
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super().__init__([])
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self.changed_address = {}
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self.changed_dma = {}
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self.force_patch = []
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if file is None:
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return
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decomp_file = local_path('ZOOTDEC.z64')
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with open(data_path('generated/symbols.json'), 'r') as stream:
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symbols = json.load(stream)
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self.symbols = {name: int(addr, 16) for name, addr in symbols.items()}
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# If decompressed file already exists, read from it
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if not force_use:
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if os.path.exists(decomp_file):
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file = decomp_file
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if file == '':
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# if not specified, try to read from the previously decompressed rom
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file = decomp_file
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try:
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self.read_rom(file)
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except FileNotFoundError:
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# could not find the decompressed rom either
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raise FileNotFoundError('Must specify path to base ROM')
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else:
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self.read_rom(file)
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else:
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self.read_rom(file)
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# decompress rom, or check if it's already decompressed
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self.decompress_rom_file(file, decomp_file, force_use)
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# Add file to maximum size
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self.buffer.extend(bytearray([0x00] * (0x4000000 - len(self.buffer))))
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with double_cache_prevention:
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if not self.original:
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Rom.original = self.copy()
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# Add version number to header.
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self.write_bytes(0x35, get_version_bytes(__version__))
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self.force_patch.extend([0x35, 0x36, 0x37])
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def copy(self):
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new_rom = Rom()
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new_rom.buffer = copy.copy(self.buffer)
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new_rom.changed_address = copy.copy(self.changed_address)
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new_rom.changed_dma = copy.copy(self.changed_dma)
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new_rom.force_patch = copy.copy(self.force_patch)
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return new_rom
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def decompress_rom_file(self, file, decomp_file, skip_crc_check):
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validCRC = [
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[0xEC, 0x70, 0x11, 0xB7, 0x76, 0x16, 0xD7, 0x2B], # Compressed
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[0x70, 0xEC, 0xB7, 0x11, 0x16, 0x76, 0x2B, 0xD7], # Byteswap compressed
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[0x93, 0x52, 0x2E, 0x7B, 0xE5, 0x06, 0xD4, 0x27], # Decompressed
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]
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# Validate ROM file
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file_name = os.path.splitext(file)
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romCRC = list(self.buffer[0x10:0x18])
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if romCRC not in validCRC and not skip_crc_check:
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# Bad CRC validation
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raise RuntimeError('ROM file %s is not a valid OoT 1.0 US ROM.' % file)
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elif len(self.buffer) < 0x2000000 or len(self.buffer) > (0x4000000) or file_name[1].lower() not in ['.z64',
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'.n64']:
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# ROM is too big, or too small, or not a bad type
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raise RuntimeError('ROM file %s is not a valid OoT 1.0 US ROM.' % file)
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elif len(self.buffer) == 0x2000000:
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# If Input ROM is compressed, then Decompress it
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sub_dir = data_path("Decompress")
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if platform.system() == 'Windows':
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subcall = [sub_dir + "\\Decompress.exe", file, decomp_file]
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elif platform.system() == 'Linux':
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if platform.uname()[4] == 'aarch64' or platform.uname()[4] == 'arm64':
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subcall = [sub_dir + "/Decompress_ARM64", file, decomp_file]
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else:
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subcall = [sub_dir + "/Decompress", file, decomp_file]
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elif platform.system() == 'Darwin':
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subcall = [sub_dir + "/Decompress.out", file, decomp_file]
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else:
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raise RuntimeError(
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'Unsupported operating system for decompression. Please supply an already decompressed ROM.')
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if not os.path.exists(subcall[0]):
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raise RuntimeError(f'Decompressor does not exist! Please place it at {subcall[0]}.')
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subprocess.call(subcall, **subprocess_args())
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self.read_rom(decomp_file)
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else:
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# ROM file is a valid and already uncompressed
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pass
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def write_byte(self, address, value):
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super().write_byte(address, value)
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self.changed_address[self.last_address - 1] = value
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def write_bytes(self, address, values):
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super().write_bytes(address, values)
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self.changed_address.update(zip(range(address, address + len(values)), values))
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def restore(self):
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self.buffer = copy.copy(self.original.buffer)
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self.changed_address = {}
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self.changed_dma = {}
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self.force_patch = []
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self.last_address = None
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self.write_bytes(0x35, get_version_bytes(__version__))
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self.force_patch.extend([0x35, 0x36, 0x37])
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def sym(self, symbol_name):
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return self.symbols.get(symbol_name)
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def write_to_file(self, file):
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self.verify_dmadata()
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self.update_header()
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with open(file, 'wb') as outfile:
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outfile.write(self.buffer)
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def update_header(self):
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crc = calculate_crc(self)
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self.write_bytes(0x10, crc)
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def read_rom(self, file):
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# "Reads rom into bytearray"
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try:
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with open(file, 'rb') as stream:
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self.buffer = bytearray(stream.read())
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except FileNotFoundError as ex:
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raise FileNotFoundError('Invalid path to Base ROM: "' + file + '"')
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# dmadata/file management helper functions
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def _get_dmadata_record(self, cur):
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start = self.read_int32(cur)
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end = self.read_int32(cur + 0x04)
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size = end - start
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return start, end, size
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def get_dmadata_record_by_key(self, key):
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cur = DMADATA_START
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dma_start, dma_end, dma_size = self._get_dmadata_record(cur)
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while True:
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if dma_start == 0 and dma_end == 0:
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return None
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if dma_start == key:
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return dma_start, dma_end, dma_size
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cur += 0x10
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dma_start, dma_end, dma_size = self._get_dmadata_record(cur)
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def verify_dmadata(self):
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cur = DMADATA_START
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overlapping_records = []
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dma_data = []
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while True:
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this_start, this_end, this_size = self._get_dmadata_record(cur)
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if this_start == 0 and this_end == 0:
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break
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dma_data.append((this_start, this_end, this_size))
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cur += 0x10
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dma_data.sort(key=lambda v: v[0])
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for i in range(0, len(dma_data) - 1):
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this_start, this_end, this_size = dma_data[i]
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next_start, next_end, next_size = dma_data[i + 1]
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if this_end > next_start:
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overlapping_records.append(
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'0x%08X - 0x%08X (Size: 0x%04X)\n0x%08X - 0x%08X (Size: 0x%04X)' % \
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(this_start, this_end, this_size, next_start, next_end, next_size)
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)
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if len(overlapping_records) > 0:
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raise Exception("Overlapping DMA Data Records!\n%s" % \
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'\n-------------------------------------\n'.join(overlapping_records))
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# update dmadata record with start vrom address "key"
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# if key is not found, then attempt to add a new dmadata entry
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def update_dmadata_record(self, key, start, end, from_file=None):
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cur, dma_data_end = self.get_dma_table_range()
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dma_index = 0
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dma_start, dma_end, dma_size = self._get_dmadata_record(cur)
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while dma_start != key:
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if dma_start == 0 and dma_end == 0:
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break
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cur += 0x10
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dma_index += 1
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dma_start, dma_end, dma_size = self._get_dmadata_record(cur)
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if cur >= (dma_data_end - 0x10):
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raise Exception('dmadata update failed: key {0:x} not found in dmadata and dma table is full.'.format(key))
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else:
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self.write_int32s(cur, [start, end, start, 0])
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if from_file == None:
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if key == None:
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from_file = -1
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else:
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from_file = key
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self.changed_dma[dma_index] = (from_file, start, end - start)
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def get_dma_table_range(self):
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cur = DMADATA_START
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dma_start, dma_end, dma_size = self._get_dmadata_record(cur)
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while True:
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if dma_start == 0 and dma_end == 0:
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raise Exception('Bad DMA Table: DMA Table entry missing.')
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if dma_start == DMADATA_START:
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return (DMADATA_START, dma_end)
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cur += 0x10
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dma_start, dma_end, dma_size = self._get_dmadata_record(cur)
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# This will scan for any changes that have been made to the DMA table
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# This assumes any changes here are new files, so this should only be called
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# after patching in the new files, but before vanilla files are repointed
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def scan_dmadata_update(self):
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cur = DMADATA_START
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dma_data_end = None
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dma_index = 0
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dma_start, dma_end, dma_size = self._get_dmadata_record(cur)
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old_dma_start, old_dma_end, old_dma_size = self.original._get_dmadata_record(cur)
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while True:
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if (dma_start == 0 and dma_end == 0) and \
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(old_dma_start == 0 and old_dma_end == 0):
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break
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# If the entries do not match, the flag the changed entry
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if not (dma_start == old_dma_start and dma_end == old_dma_end):
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self.changed_dma[dma_index] = (-1, dma_start, dma_end - dma_start)
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cur += 0x10
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dma_index += 1
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dma_start, dma_end, dma_size = self._get_dmadata_record(cur)
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old_dma_start, old_dma_end, old_dma_size = self.original._get_dmadata_record(cur)
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# gets the last used byte of rom defined in the DMA table
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def free_space(self):
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cur = DMADATA_START
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max_end = 0
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while True:
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this_start, this_end, this_size = self._get_dmadata_record(cur)
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if this_start == 0 and this_end == 0:
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break
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max_end = max(max_end, this_end)
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cur += 0x10
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max_end = ((max_end + 0x0F) >> 4) << 4
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return max_end
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def compress_rom_file(input_file, output_file):
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subcall = []
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compressor_path = data_path("Compress")
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if platform.system() == 'Windows':
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compressor_path += "\\Compress.exe"
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elif platform.system() == 'Linux':
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if platform.uname()[4] == 'aarch64' or platform.uname()[4] == 'arm64':
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compressor_path += "/Compress_ARM64"
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else:
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compressor_path += "/Compress"
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elif platform.system() == 'Darwin':
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compressor_path += "/Compress.out"
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else:
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raise RuntimeError('Unsupported operating system for compression.')
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if not os.path.exists(compressor_path):
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raise RuntimeError(f'Compressor does not exist! Please place it at {compressor_path}.')
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process = subprocess.call([compressor_path, input_file, output_file], **subprocess_args(include_stdout=False))
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