add endfield support

app.py

@@ -359,11 +359,11 @@ class AnimeWwise(QMainWindow):
 			files = []
 			if self.folders["input"]:
 				if self.pckSubFold.isChecked():
-					files = [os.path.join(root, f) for root, dirs, files_in_dir in os.walk(self.folders["input"]) for f in files_in_dir if f.endswith(".pck")]
+					files = [os.path.join(root, f) for root, dirs, files_in_dir in os.walk(self.folders["input"]) for f in files_in_dir if f.endswith(".pck") or f.endswith(".chk")]
 				else:
-					files = [os.path.join(self.folders["input"], f) for f in os.listdir(self.folders["input"]) if f.endswith(".pck")]
+					files = [os.path.join(self.folders["input"], f) for f in os.listdir(self.folders["input"]) if f.endswith(".pck") or f.endswith(".chk")]
 		elif self.loadType == "file":
-			path = QFileDialog.getOpenFileName(self, "Select .pck File", "", "PCK Files (*.pck)", options=QFileDialog.Options())
+			path = QFileDialog.getOpenFileName(self, "Select audio file", "", "PCK Files (*.pck);; CHK Files (*.chk)", options=QFileDialog.Options())
 			self.folders["input"] = os.path.dirname(path[0])
 			files = [path[0]]
 
@@ -554,7 +554,8 @@ class AnimeWwise(QMainWindow):
 			"path": path[:-1],
 			"source": meta["source"],
 			"offset": meta["offset"],
-			"size": meta["size"]
+			"size": meta["size"],
+			"original_name": meta["original_name"]
 		}
 
 	# misc

extract.py

@@ -6,6 +6,7 @@ import tempfile
 import wavescan
 import platform
 import subprocess
+from vfs import decrypt
 from mapper import Mapper
 from allocator import Allocator
 from filereader import FileReader
@@ -85,8 +86,7 @@ class WwiseExtract:
 		self.get_wems(data, os.path.basename(_input), hdiff, os.path.relpath(_input, start=base_path))
 
 	def get_wems(self, data, filename, hdiff, relpath):
-		reader = FileReader(io.BytesIO(data), "little")
-		files = wavescan.get_data(reader, filename)
+		files = wavescan.get_data(data, filename)
 		
 		if hdiff is not None:
 			with open(hdiff, "rb") as f:
@@ -143,8 +143,7 @@ class WwiseExtract:
 			f.write(data)
 			f.close()
 
-		reader = FileReader(io.BytesIO(data), "little")
-		files = wavescan.get_data(reader, source_name)
+		files = wavescan.get_data(data, source_name)
 
 		working_dir.cleanup()
 
@@ -167,7 +166,7 @@ class WwiseExtract:
 		# banks = json.loads(handle.read())
 		# handle.close()
 
-		for file in files:
+		def process_file(file):
 			if mapper is not None:
 				key = mapper.get_key(file[0].split(".")[0])
 
@@ -183,14 +182,15 @@ class WwiseExtract:
 				"source": relpath,
 				"size": file[2],
 				"offset": file[1],
+				"original_name": file[0],
 				"metadata": {}
 			}
 
 			wem_data = data[file_data["offset"]:file_data["offset"]+file_data["size"]]
-			parsed_wem = wwise.parse_wwise(FileReader(io.BytesIO(wem_data), "little", name=f"{file[3]}:{file[0]}:{file[1]}"))
+			parsed_wem = wwise.parse_wwise(wem_data, f"{file[3]}:{file[0]}:{file[1]}", file[0])
 
 			if not parsed_wem:
-				continue
+				return
 
 			file_data["metadata"] = parsed_wem
 
@@ -228,6 +228,12 @@ class WwiseExtract:
 				if "unmapped" not in temp:
 					temp["unmapped"] = {"folders": {}, "files": []}
 				temp["unmapped"]["files"].append([file[0], file_data])
+		
+		pos = 0
+		for file in files:
+			process_file(file)
+			pos += 1
+			self.update_progress(pos, len(files), 1)
 
 		self.file_structure = base
 
@@ -316,7 +322,22 @@ class WwiseExtract:
 
 				file["source"] = file["source"].split(" (hdiff)")[0]
 				data = self.allocator.read_at(file["source"], file["offset"], file["size"])
-				
+
+				if data[0:4] not in [b"RIFF", b"RIFX"]:
+					# file may be vfs encrypted
+					data = bytearray(data)
+					wem_id = 0
+					try:
+						wem_id = int(file["original_name"][:-4])
+					except ValueError:
+						try:
+							wem_id = int(file["original_name"][:-4], 16)
+						except ValueError:
+							continue
+					decrypt(data, 0, len(data), wem_id, 0)
+					if data[0:4] not in [b"RIFF", b"RIFX"]:
+						continue
+							
 				filepath = path("/".join(file["path"]), file["name"])
 				fullpath = path(output, filepath)
 				os.makedirs(os.path.dirname(fullpath), exist_ok=True)

mapper.py

@@ -31,7 +31,8 @@ class Mapper:
 		games = {
 			"hk4e": "Genshin",
 			"hkrpg": "Star Rail",
-			"nap": "Zenless Zone Zero"
+			"nap": "Zenless Zone Zero",
+			"beyond": "Arknights Endfield"
 			# more later
 		}
 

version.json

@@ -1,6 +1,6 @@
 {
     "version": 222,
-    "mapsVersion": 122,
+    "mapsVersion": 123,
     "maps": [
         {
             "name": "hk4e.map",
@@ -16,6 +16,11 @@
             "name": "nap.map",
             "game": "Zenless Zone Zero",
             "version": "2.2"
+        },
+        {
+            "name": "beyond.map",
+            "game": "Arknights Endfield",
+            "version": "1.0"
         }
     ]
 }

vfs.py

@@ -0,0 +1,53 @@
+# decrypt and parse endfield's .chk files for audio
+
+def decrypt(data, offset, count, seed, fileOffset):
+	keySeed = seed + (fileOffset >> 2)
+
+	dataIndex = offset
+	remaining = count
+	alignement = fileOffset & 3
+
+	# head
+	if alignement != 0:
+		keyValue = key(keySeed)
+		toAlign = min(4 - alignement, remaining)
+
+		for i in range(toAlign):
+			if dataIndex >= offset + count:
+				break
+			bytePos = alignement + i
+			data[dataIndex] ^= (keyValue >> (bytePos * 8)) & 0xFF
+			dataIndex += 1
+
+		remaining -= toAlign
+		keySeed += 1
+
+	# body
+	nBlocks = remaining // 4
+
+	for i in range(nBlocks):
+		keyValue = key(keySeed)
+		dataValue = int.from_bytes(data[dataIndex:dataIndex+4], "little") ^ keyValue
+
+		data[dataIndex] = dataValue & 0xFF
+		data[dataIndex+1] = (dataValue >> 8) & 0xFF
+		data[dataIndex+2] = (dataValue >> 16) & 0xFF
+		data[dataIndex+3] = (dataValue >> 24) & 0xFF
+		
+		dataIndex += 4
+		keySeed += 1
+
+	# tail
+	trailing = remaining & 3
+	if trailing > 0:
+		keyValue = key(keySeed)
+		for i in range(trailing):
+			data[dataIndex] ^= (keyValue >> (i * 8)) & 0xFF
+			dataIndex += 1
+
+def key(seed):
+	k = ((((seed & 0xFF) ^ 0x9C5A0B29) & 0xFFFFFFFF) * 81861667) & 0xFFFFFFFF
+	k = ((k ^ ((seed >> 8) & 0xFF)) * 81861667) & 0xFFFFFFFF
+	k = ((k ^ ((seed >> 16) & 0xFF)) * 81861667) & 0xFFFFFFFF
+	k = ((k ^ (seed >> 24) & 0xFF) * 81861667) & 0xFFFFFFFF
+	return k

wavescan.py

@@ -1,7 +1,10 @@
 # Custom rewrite of the Wwise AKPK packages extractor, original by Nicknine and bnnm
 import os
+import io
 import traceback
 from bnk import bnk2wem
+from vfs import decrypt
+from filereader import FileReader
 
 
 reader = None
@@ -10,7 +13,7 @@ wwise_data = []
 filename = ""
 
 
-def get_data(_reader, _filename):
+def get_data(data, _filename):
 	global wwise_data
 	global bank_version
 	global reader
@@ -18,10 +21,32 @@ def get_data(_reader, _filename):
 
 	filename = _filename
 	wwise_data = []
-	reader = _reader
+	reader = FileReader(io.BytesIO(data), "little")
+	vfs = False
 
 	# check file
-	if reader.ReadBytes(4) != b"AKPK":
+	magic = reader.ReadBytes(4)
+	if magic == b":)xD":
+		# file is endfield VFS
+		print("file is VFS !!")
+		vfs = True
+		reader.SetBufferPos(4)
+		header_size = reader.ReadUInt32()
+		print(header_size)
+		reader.SetBufferPos(0)
+		header = bytearray(reader.ReadBytes(header_size+8))
+		decrypt(header, 12, header_size - 4, header_size, 0)
+		# recreate file
+		dec_data = bytearray()
+		dec_data += header
+		dec_data += data[header_size+8:]
+		dec_data[0:4] = b"AKPK"
+		dec_data[8:12] = (1).to_bytes(4, "little")
+		data = dec_data
+		reader = FileReader(io.BytesIO(data), "little") # reset reader
+		magic = reader.ReadBytes(4)
+
+	if magic != b"AKPK":
 		# file.close()
 		raise Exception("not a valid audio file")
 

wwise.py

@@ -1,5 +1,11 @@
 # wwise riff header parser
 # thanks to hcs and bnnm work
+import io
+from vfs import decrypt
+from filereader import FileReader
+
+def parse_wwise(data, name, fid):
+	reader = FileReader(io.BytesIO(data), "little", name=name)
 
 def parse_wwise(reader):
 	# default meta config
@@ -27,6 +33,28 @@ def parse_wwise(reader):
 
 	header = reader.ReadBytes(4)
 
+	if header not in ["RIFF", "RIFX"]:
+		# file may be vfs encrypted, however this is painfully slow so by default it will skip this and return no metadata
+
+		if False: # set to true to parse metadata
+			data = bytearray(data)
+			wem_id = 0
+			try:
+				wem_id = int(fid[:-4])
+			except ValueError:
+				try:
+					wem_id = int(fid[:-4], 16)
+				except ValueError:
+					return None
+			decrypt(data, 0, len(data), wem_id, 0)
+			if data[0:4] not in [b"RIFF", b"RIFX"]:
+				print(f"[WARNING] invalid header {header} at {reader.GetName()}, assuming unreadable")
+				return None
+			reader = FileReader(io.BytesIO(data), "little", name=name) # reset reader
+			header = reader.ReadBytes(4)
+		else:
+			return metadata
+
 	# endian check header
 	if header == b"RIFX":
 		reader.endianness = "big"
@@ -52,7 +80,7 @@ def parse_wwise(reader):
 	while reader.GetBufferPos() < reader.GetStreamLength():
 		chunk_type = reader.ReadBytes(4)
 
-		if chunk_type not in [b"fmt ", b"JUNK", b"data", b"akd ", b"cue ", b"LIST", b"smpl"]:
+		if chunk_type not in [b"fmt ", b"JUNK", b"data", b"akd ", b"cue ", b"LIST", b"smpl", b"hash", b"seek"]:
 			print(f"[WARNING] unexpected chunk {chunk_type} at {reader.GetName()}")
 
 		formatted_chunk_type = chunk_type.decode("utf-8").replace(" ", "")