static void Main(string[] args)
{
if (args.Length == 0)
{
Console.WriteLine("usage:");
Console.WriteLine("Extraction:");
Console.WriteLine("\t{0} x input.l7z", AppDomain.CurrentDomain.FriendlyName);
Console.WriteLine();
Console.WriteLine("Creation:");
Console.WriteLine("\t{0} c input_folderName output.l7z", AppDomain.CurrentDomain.FriendlyName);
Console.WriteLine();
Console.WriteLine("Decompress individual file with mode 0x80:");
Console.WriteLine("\t{0} d input.bin output.bin", AppDomain.CurrentDomain.FriendlyName);
Console.WriteLine();
Console.WriteLine("Compress individual file with mode 0x80:");
Console.WriteLine("\t{0} e input.bin output.bin", AppDomain.CurrentDomain.FriendlyName);
Environment.Exit(1);
}
if (args[0] == "c")
{
PackArchive(args[1], args[2]);
}
else if (args[0] == "x")
{
UnpackArchive(args[1]);
}
else if (args[0] == "d")
{
var input = args[1];
var output = input + ".out";
if (args.Length >= 2)
{
output = args[2];
}
byte[] data;
using (BinaryReader reader = new BinaryReader(File.OpenRead(input)))
{
var expectedFileSize = reader.ReadUInt32();
if (expectedFileSize == 0x19) // Blank
{
expectedFileSize = reader.ReadUInt32();
}
else
{
expectedFileSize = (expectedFileSize & 0xffffff00) >> 8;
}
data = TaikoCompression.Decompress(reader.ReadBytes((int)reader.BaseStream.Length - 4));
if (data.Length != expectedFileSize)
{
Console.WriteLine("File size didn't match expected output file size. Maybe bad decompression? ({0:x8} != {1:x8})", data.Length, expectedFileSize);
}
}
File.WriteAllBytes(output, data);
}
else if (args[0] == "e")
{
var input = args[1];
var output = input + ".out";
if (args.Length >= 2)
{
output = args[2];
}
var data = File.ReadAllBytes(input);
using (var writer = new BinaryWriter(File.OpenWrite(output)))
{
var expectedFileSize = data.Length;
if (expectedFileSize > 0xffffff)
{
writer.Write(0x00000019);
writer.Write(expectedFileSize);
}
else
{
writer.Write((expectedFileSize << 8) | 0x19);
}
writer.Write(TaikoCompression.Compress(data));
}
}
}
static void UnpackArchive(string inputFilename)
{
using (BinaryReader reader = new BinaryReader(File.OpenRead(inputFilename)))
{
if (reader.ReadUInt32() != 0x4143374c)
{
Console.WriteLine("Not a L7CA archive");
Environment.Exit(1);
}
var header = new L7CAHeader
{
unk = reader.ReadUInt32(),
archiveSize = reader.ReadInt32(),
metadataOffset = reader.ReadInt32(),
metadataSize = reader.ReadInt32(),
unk2 = reader.ReadUInt32(),
filesystemEntries = reader.ReadInt32(),
folders = reader.ReadInt32(),
files = reader.ReadInt32(),
chunks = reader.ReadInt32(),
stringTableSize = reader.ReadInt32(),
unk4 = reader.ReadInt32()
};
if (header.unk4 != 0x05)
{
Console.WriteLine("This archive type is unsupported and most likely won't unpack properly.");
}
// Read strings
var baseOffset = reader.BaseStream.Length - header.stringTableSize;
reader.BaseStream.Seek(baseOffset, SeekOrigin.Begin);
var strings = new Dictionary <int, string>();
while (reader.PeekChar() != -1)
{
var offset = (int)(reader.BaseStream.Position - baseOffset);
int len = reader.ReadByte();
var str = Encoding.UTF8.GetString(reader.ReadBytes(len));
strings.Add(offset, str);
}
// Read filesystem entries
var entries = new Dictionary <int, L7CAFilesystemEntry>();
reader.BaseStream.Seek(header.metadataOffset, SeekOrigin.Begin);
for (var i = 0; i < header.filesystemEntries; i++)
{
var entry = new L7CAFilesystemEntry
{
id = reader.ReadInt32(),
hash = reader.ReadUInt32(),
folderOffset = reader.ReadInt32(),
filenameOffset = reader.ReadInt32(),
timestamp = reader.ReadInt64()
};
entry.filename = entry.id == -1 ?
$"{strings[entry.folderOffset]}" :
$"{strings[entry.folderOffset]}/{strings[entry.filenameOffset]}";
//Console.WriteLine("{0:x8} {1:x8} {2:x8} {3:x8} {4:x16}", entry.id, entry.hash, entry.folderOffset, entry.filenameOffset, entry.timestamp);
if (Crc32.CalculateNamco(entry.filename) != entry.hash)
{
Console.WriteLine("{0} did not match expected hash", entry.filename);
}
if (entry.id != -1)
{
entries.Add(entry.id, entry);
}
else
{
// -1 is a folder.
// Only create a folder and move on to next entry.
// This step probably isn't needed, but just for the sake of completeness I added it.
// There might be some game out there that has blank folders but no actual data in it, so those will be accounted for as well.
if (!Directory.Exists(entry.filename))
{
Directory.CreateDirectory(entry.filename);
}
}
}
// Read file information
var files = new List <L7CAFileEntry>();
for (var i = 0; i < header.files; i++)
{
var entry = new L7CAFileEntry
{
compressedFilesize = reader.ReadInt32(),
rawFilesize = reader.ReadInt32(),
chunkIdx = reader.ReadInt32(),
chunkCount = reader.ReadInt32(),
offset = reader.ReadInt32(),
crc32 = reader.ReadUInt32()
};
//var filename = entries[(uint)i].filename;
//Console.WriteLine("{2}\noffset[{0:x8}] fileSize[{1:x8}]\nreal_crc32[{3:x8}] crc32[{4:x8}] crc32[{5:x8}]\n", entry.offset, entry.compressedFileSize, filename, entries[(uint)i].hash, crc32.Value, entry.crc32);
files.Add(entry);
}
// Read chunk information
var chunks = new List <L7CAChunkEntry>();
for (var i = 0; i < header.chunks; i++)
{
var entry = new L7CAChunkEntry
{
chunkSize = reader.ReadInt32(),
unk = reader.ReadUInt16(),
chunkId = reader.ReadUInt16()
};
//Console.WriteLine("{3:x8} {0:x8} {1:x4} {2:x4}", entry.chunkSize, entry.unk, entry.chunkNum, i);
chunks.Add(entry);
}
for (var i = 0; i < header.files; i++)
{
var file = files[i];
var entry = entries[i];
Console.WriteLine("Extracting {0}...", entry.filename);
//Console.WriteLine("{0:x1} {1:x8} {2:x8} {3:x8} {4:x8} {5:x8}", file.chunkIdx, file.chunkCount, file.offset, file.compressedFileSize, file.rawFileSize, file.crc32);
//var output = Path.Combine("output", entry.filename);
var output = entry.filename;
Directory.CreateDirectory(Path.GetDirectoryName(output));
reader.BaseStream.Seek(file.offset, SeekOrigin.Begin);
var origData = reader.ReadBytes(file.compressedFilesize);
var data = new List <byte>();
using (var dataStream = new BinaryReader(new MemoryStream(origData)))
{
if (_debugDecompressionCode)
{
foreach (var f in Directory.EnumerateFiles(".", "output-chunk-*.bin"))
{
File.Delete(f);
}
}
for (int x = 0; x < file.chunkCount; x++)
{
var compMode = (chunks[file.chunkIdx + x].chunkSize >> 24) & 0xff;
var len = chunks[file.chunkIdx + x].chunkSize & 0xffffff;
var isCompressed = (chunks[file.chunkIdx + x].chunkSize & 0x80000000) != 0;
if (isCompressed)
{
Console.WriteLine("Chunk is compressed.");
}
if (_debugDecompressionCode)
{
Console.WriteLine("{0:x8} {1}", len, isCompressed);
}
var d = dataStream.ReadBytes(len);
if (_debugDecompressionCode)
{
File.WriteAllBytes($"output-chunk-{x}.bin", d);
}
if (isCompressed)
{
try
{
// Decompress chunk
switch (compMode)
{
case 0x80:
d = TaikoCompression.Decompress(d, data.ToArray());
data = new List <byte>(d);
break;
case 0x81:
d = TaikoCompression2.Decompress(d, data.ToArray());
data = new List <byte>(d);
break;
}
}
catch
{
// Save compressed data
Console.WriteLine("Could not decompress file.");
data.AddRange(d);
}
}
else
{
data.AddRange(d);
}
//Console.WriteLine(" {0:x8}", d.Length);
if (_debugDecompressionCode)
{
File.WriteAllBytes($"output-chunk-{x}-decomp.bin", d);
}
}
}
var crc32 = Crc32.Calculate(data.ToArray());
if (crc32 != file.crc32)
{
Console.WriteLine("Invalid CRC32: {0:x8} vs {1:x8}", crc32, file.crc32);
//File.WriteAllBytes("invalid.bin", data.ToArray());
//Environment.Exit(1);
}
File.WriteAllBytes(output, data.ToArray());
if (data.Count != file.rawFilesize)
{
Console.WriteLine("Invalid file size: {0:x8} vs {1:x8}", data.Count, file.rawFilesize);
//Environment.Exit(1);
}
Console.WriteLine();
}
}
}
