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Copy pathSerializedFile.py
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480 lines (383 loc) · 12.8 KB
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import os
import re
import sys
from ..CommonString import COMMON_STRING
from ..EndianBinaryReader import EndianBinaryReader
from ..EndianBinaryWriter import EndianBinaryWriter
from ..ObjectReader import ObjectReader
from ..enums import BuildTarget, ClassIDType
RECURSION_LIMIT = sys.getrecursionlimit()
class SerializedFileHeader:
metadata_size: int
file_size: int
version: int
data_offset: int
endian: bytes
reserved: bytes
def __init__(self, reader: EndianBinaryReader):
self.metadata_size = reader.read_u_int()
self.file_size = reader.read_u_int()
self.version = reader.read_u_int()
self.data_offset = reader.read_u_int()
class LocalSerializedObjectIdentifier: # script type
local_serialized_file_index: int
local_identifier_in_file: int
def __init__(self, header: SerializedFileHeader, reader: EndianBinaryReader):
self.local_serialized_file_index = reader.read_int()
if header.version < 14:
self.local_identifier_in_file = reader.read_int()
else:
reader.align_stream()
self.local_identifier_in_file = reader.read_long()
def write(self, header: SerializedFileHeader, writer: EndianBinaryWriter):
writer.write_int(self.local_serialized_file_index)
if header.version < 14:
writer.write_int(self.local_identifier_in_file)
else:
writer.align_stream()
writer.write_long(self.local_identifier_in_file)
class FileIdentifier: # external
guid: bytes
type: int
# enum { kNonAssetType = 0, kDeprecatedCachedAssetType = 1, kSerializedAssetType = 2, kMetaAssetType = 3 };
path: str
@property
def name(self):
return os.path.basename(self.path)
def __init__(self, header: SerializedFileHeader, reader: EndianBinaryReader):
if header.version >= 6:
self.temp_empty = reader.read_string_to_null()
if header.version >= 5:
self.guid = reader.read_bytes(16)
self.type = reader.read_int()
self.path = reader.read_string_to_null()
def write(self, header: SerializedFileHeader, writer: EndianBinaryWriter):
if header.version >= 6:
writer.write_string_to_null(self.temp_empty)
if header.version >= 5:
writer.write_bytes(self.guid)
writer.write_int(self.type)
writer.write_string_to_null(self.path)
class TypeTreeNode:
type: str
name: str
byte_size: int
index: int
is_array: int
version: int
meta_flag: int
level: int
type_str_offset: int
name_str_offset: int
class BuildType:
build_type: str
def __init__(self, build_type):
self.build_type = build_type
@property
def is_alpha(self):
return self.build_type == 'a'
@property
def is_path(self):
return self.build_type == 'p'
class SerializedType:
class_id: ClassIDType
is_stripped_type: bool
script_type_index = -1
nodes: list = [] # TypeTreeNode
script_id: bytes # Hash128
old_type_hash: bytes # Hash128}
class ObjectInfo:
byte_start: int
byte_size: int
type_id: int
class_id: ClassIDType
path_id: int
serialized_type: SerializedType
def __init__(self, header, reader, types):
if header.version < 14:
self.path_id = reader.read_int()
else:
reader.align_stream()
self.path_id = reader.read_long()
self.byte_start = reader.read_u_int()
self.byte_start += header.data_offset
self.byte_size = reader.read_u_int()
self.type_id = reader.read_int()
if header.version < 16:
self.class_id = ClassIDType(reader.read_u_short())
# _types.Find(x => x.class_id == object_info.type_id)
if types:
self.serialized_type = [
x for x in types if x.class_id == self.type_id][0]
else:
self.serialized_type = SerializedType()
self.is_destroyed = reader.read_u_short()
else:
typ = types[self.type_id]
self.serialized_type = typ
self.class_id = ClassIDType(typ.class_id)
if header.version == 15 or header.version == 16:
self.stripped = reader.read_byte()
def write(self, header, writer):
if header.version < 14:
writer.write_int(self.path_id)
else:
writer.align_stream()
writer.write_long(self.path_id)
writer.write_u_int(self.byte_start - header.data_offset)
writer.write_u_int(self.byte_size)
writer.writ_int(self.type_id)
if header.version < 16:
# WARNING - CLASSIDTYPE MIGHT CHANGE THE NUMBER IF IT'S UNNOWN
writer.write_u_short(int(self.class_id))
writer.write_u_short(self.is_destroyed)
if header.version == 15 or header.version == 16:
writer.write_byte(self.stripped)
class SerializedFile:
reader: EndianBinaryReader
full_name: str
unity_version: str
version: list
build_type: ""
_target_platform: BuildTarget
_types: list
_objects: list
_script_types: list
_externals: list
_container: dict
objects: dict
container: dict
_cache: dict
header: SerializedFileHeader
@property
def name(self) -> str:
return os.path.basename(self.full_name)
def __init__(self, assets_manager, full_name: str, reader: EndianBinaryReader):
self.assets_manager = assets_manager
self.reader = reader
self.full_name = full_name
self.unity_version = "2.5.0f5"
self.version = [0, 0, 0, 0]
self.build_type = ""
self._target_platform = BuildTarget.UnknownPlatform
self._enable_type_tree = True
self._types = []
self._objects = []
self._script_types = []
self._externals = []
self._container = {}
self.objects = {}
self.container = {}
# used to speed up mass asset extraction
# some assets refer to each other, so by keeping the result
# of specific assets cached the extraction can be speed up by a lot.
# used by: Sprite (Texture2D (with alpha) cached),
self._cache = {}
# ReadHeader
header = SerializedFileHeader(reader)
self.header = header
if header.version >= 9:
header.endian = '>' if reader.read_boolean() else '<'
header.reserved = reader.read_bytes(3)
else:
reader.Position = header.file_size - header.metadata_size
header.endian = '>' if reader.read_boolean() else '<'
reader.endian = header.endian
if header.version >= 7:
unity_version = reader.read_string_to_null()
self.set_version(unity_version)
if header.version >= 8:
self._m_target_platform = reader.read_int()
try:
self._target_platform = BuildTarget(self._m_target_platform)
except KeyError:
self._target_platform = BuildTarget.UnknownPlatform
if header.version >= 13:
self._enable_type_tree = reader.read_boolean()
# ReadTypes
type_count = reader.read_int()
self._types = [
self.read_serialized_type()
for _ in range(type_count)
]
if 7 <= header.version < 14:
self.big_id_enabled = reader.read_int()
# ReadObjects
object_count = reader.read_int()
self._objects = [
ObjectInfo(header, reader, self._types)
for _ in range(object_count)
]
if header.version >= 11:
script_count = reader.read_int()
self._script_types = [
LocalSerializedObjectIdentifier(header, reader)
for _ in range(script_count)
]
externals_count = reader.read_int()
self._externals = [
FileIdentifier(header, reader)
for _ in range(externals_count)
]
self.userInformation = reader.read_string_to_null()
# read the asset_bundles to get the containers
old_pos = reader.Position
self.objects = {
object_info.path_id: ObjectReader(reader, self, object_info)
for object_info in self._objects
}
for obj in self.objects.values():
if obj.type == ClassIDType.AssetBundle:
data = obj.read()
for container, asset_info in data.container.items():
asset = asset_info.asset
self.container[container] = asset
self._container[asset.path_id] = container
reader.Position = old_pos
def set_version(self, string_version):
self.unity_version = string_version
self.build_type = BuildType(re.findall(r'([^\d.])', string_version)[0])
version_split = re.split(r'\D', string_version)
self.version = [int(x) for x in version_split]
def read_serialized_type(self):
type_ = SerializedType()
type_.class_id = self.reader.read_int()
if self.header.version >= 16:
type_.is_stripped_type = self.reader.read_boolean()
if self.header.version >= 17:
type_.script_type_index = self.reader.read_short()
if self.header.version >= 13:
if (self.header.version < 16 and type_.class_id < 0) or (
self.header.version >= 16 and type_.class_id == 114):
type_.script_id = self.reader.read_bytes(16) # Hash128
type_.old_type_hash = self.reader.read_bytes(16) # Hash128
if self._enable_type_tree:
type_tree = []
if self.header.version >= 12 or self.header.version == 10:
self.read_type_tree5(type_tree)
else:
self.read_type_tree(type_tree)
type_.nodes = type_tree
return type_
def read_type_tree(self, type_tree, level=0):
if level == RECURSION_LIMIT - 1:
raise RecursionError
type_tree_node = TypeTreeNode()
type_tree.append(type_tree_node)
type_tree_node.level = level
type_tree_node.type = self.reader.read_string_to_null()
type_tree_node.name = self.reader.read_string_to_null()
type_tree_node.byte_size = self.reader.read_int()
if self.header.version == 2:
variable_count = self.reader.read_int()
if self.header.version != 3:
type_tree_node.index = self.reader.read_int()
type_tree_node.is_array = self.reader.read_int()
type_tree_node.version = self.reader.read_int()
if self.header.version != 3:
type_tree_node.meta_flag = self.reader.read_int()
children_count = self.reader.read_int()
for i in range(children_count):
self.read_type_tree(type_tree, level + 1)
def read_type_tree5(self, type_tree):
number_of_nodes = self.reader.read_int()
string_buffer_size = self.reader.read_int()
node_size = 24
if self.header.version > 17:
node_size = 32
self.reader.Position += number_of_nodes * node_size
string_buffer_reader = EndianBinaryReader(
self.reader.read(string_buffer_size))
self.reader.Position -= number_of_nodes * node_size + string_buffer_size
for i in range(number_of_nodes):
type_tree_node = TypeTreeNode()
type_tree.append(type_tree_node)
type_tree_node.version = self.reader.read_u_short()
type_tree_node.level = self.reader.read_byte()
type_tree_node.is_array = self.reader.read_boolean()
type_tree_node.type_str_offset = self.reader.read_u_int()
type_tree_node.name_str_offset = self.reader.read_u_int()
type_tree_node.byte_size = self.reader.read_int()
type_tree_node.index = self.reader.read_int()
type_tree_node.meta_flag = self.reader.read_int()
if self.header.version > 17:
self.reader.Position += 8
type_tree_node.type = read_string(
string_buffer_reader, type_tree_node.type_str_offset)
type_tree_node.name = read_string(
string_buffer_reader, type_tree_node.name_str_offset)
self.reader.Position += string_buffer_size
def save(self) -> bytes:
# adjust metadata_size, data_offst and file_size
header = self.header
types = self._types
objects = self._objects
script_types = self._script_types
externals = self._externals
# write-up
writer = EndianBinaryWriter()
# header
writer.write_u_int(header.metadata_size)
writer.write_u_int(header.file_size)
writer.write_u_int(header.version)
writer.write_u_int(header.data_offset)
if header.version >= 9:
writer.write_boolean(header.endian == '>')
writer.write_bytes(header.reserved)
else:
NotImplementedError("old header")
writer.endian = header.endian
if header.version >= 7:
writer.write_string_to_null(self.unity_version)
else:
NotImplementedError("old header")
if header.version >= 8:
writer.write_int(self._m_target_platform)
if header.version >= 13:
writer.write_boolean(self._enable_type_tree)
# types
writer.write(len(types))
for typ in types:
writer.write_int(typ.class_id)
if header.version >= 16:
writer.write_boolean(typ.is_stripped_type)
if header.version >= 17:
writer.write_short(typ.script_type_index)
if header.version >= 13:
if (header.version < 16 and typ.class_id < 0) or (
header.version >= 16 and typ.class_id == 114):
writer.write_bytes(typ.script_id) # Hash128
writer.write_bytes(typ._old_type_hash) # Hash128
if self._enable_type_tree:
if header.version >= 12 or header.version == 10:
raise NotImplementedError("type tree 5")
# write type tree 5
else:
raise NotImplementedError("type tree")
# write type tree
if 7 <= header.version < 14:
writer.write_int(self.big_id_enabled)
# objects
writer.write_int(len(objects))
for obj in objects:
obj.write(writer, header, writer)
# scripts
if header.version >= 11:
writer.write_int(len(script_types))
for script_type in script_types:
script_type.write(header, writer)
# externals
writer.write_int(len(externals))
for external in externals:
external.write(header, writer)
writer.write_string_to_null(self.userInformation)
return writer.bytes
def read_string(string_buffer_reader, value) -> str:
is_offset = (value & 0x80000000) == 0
if is_offset:
string_buffer_reader.Position = value
return string_buffer_reader.read_string_to_null()
offset = value & 0x7FFFFFFF
if offset in COMMON_STRING:
return COMMON_STRING[offset]
return str(offset)