public static void Decompress(byte[] compressed, int compressedOffset, int compressedSize,
byte[] uncompressed, int uncompressedOffset, int uncompressedSize, FArchive?reader = null)
{
LoadOodleDll();
unsafe
{
fixed(byte *compressedPtr = compressed, uncompressedPtr = uncompressed)
{
var decodedSize = Oodle.OodleLZ_Decompress(compressedPtr + compressedOffset, compressedSize,
uncompressedPtr + uncompressedOffset, uncompressedSize, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
if (decodedSize <= 0)
{
if (reader != null)
{
throw new OodleException(reader, $"Oodle decompression failed with result {decodedSize}");
}
else
{
throw new OodleException($"Oodle decompression failed with result {decodedSize}");
}
}
else if (decodedSize < uncompressedSize)
{
// Not sure whether this should be an exception or not
Log.Warning("Oodle decompression just decompressed {0} bytes of the expected {1} bytes", decodedSize, uncompressedSize);
}
}
}
}
public static void Decompress(byte[] compressed, int compressedOffset, int compressedSize, byte[] uncompressed, int uncompressedOffset, int uncompressedSize, CompressionMethod method, FArchive?reader = null)
{
using var srcStream = new MemoryStream(compressed, compressedOffset, compressedSize, false)
{
Position = 0
};
switch (method)
{
case CompressionMethod.None:
Buffer.BlockCopy(compressed, compressedOffset, uncompressed, uncompressedOffset, compressedSize);
return;
case CompressionMethod.Zlib:
var zlib = new ZlibStream(srcStream, CompressionMode.Decompress);
zlib.Read(uncompressed, uncompressedOffset, uncompressedSize);
zlib.Dispose();
return;
case CompressionMethod.Gzip:
var gzip = new GZipStream(srcStream, CompressionMode.Decompress);
gzip.Read(uncompressed, uncompressedOffset, uncompressedSize);
gzip.Dispose();
return;
case CompressionMethod.Oodle:
Oodle.Decompress(compressed, compressedOffset, compressedSize, uncompressed, uncompressedOffset, uncompressedSize, reader);
return;
case CompressionMethod.LZ4:
var uncompressedBuffer = new byte[uncompressedSize + uncompressedSize / 255 + 16]; // LZ4_compressBound(uncompressedSize)
int result;
#if USE_LZ4_NATIVE_LIB
unsafe
{
fixed(byte *compressedPtr = compressed, uncompressedBufferPtr = uncompressedBuffer)
{
result = LZ4.LZ4_decompress_safe(compressedPtr + compressedOffset, uncompressedBufferPtr, compressedSize, uncompressedBuffer.Length);
}
}
#else
result = LZ4Codec.Decode(compressed, compressedOffset, compressedSize, uncompressedBuffer, 0, uncompressedBuffer.Length);
#endif
Buffer.BlockCopy(uncompressedBuffer, 0, uncompressed, uncompressedOffset, uncompressedSize);
if (result != uncompressedSize)
{
throw new FileLoadException($"Failed to decompress LZ4 data (Expected: {uncompressedSize}, Result: {result})");
}
return;
default:
if (reader != null)
{
throw new UnknownCompressionMethodException(reader, $"Compression method \"{method}\" is unknown");
}
else
{
throw new UnknownCompressionMethodException($"Compression method \"{method}\" is unknown");
}
}
}
public static void Decompress(byte[] compressed, int compressedOffset, int compressedSize, byte[] uncompressed, int uncompressedOffset, int uncompressedSize, CompressionMethod method, FArchive?reader = null)
{
using var srcStream = new MemoryStream(compressed, compressedOffset, compressedSize, false)
{
Position = 0
};
switch (method)
{
case CompressionMethod.None:
Buffer.BlockCopy(compressed, compressedOffset, uncompressed, uncompressedOffset, compressedSize);
return;
case CompressionMethod.Zlib:
var zlib = new ZlibStream(srcStream, CompressionMode.Decompress);
zlib.Read(uncompressed, uncompressedOffset, uncompressedSize);
zlib.Dispose();
return;
case CompressionMethod.Gzip:
var gzip = new GZipStream(srcStream, CompressionMode.Decompress);
gzip.Read(uncompressed, uncompressedOffset, uncompressedSize);
gzip.Dispose();
return;
case CompressionMethod.Oodle:
Pro_Swapper.Swap.RawExport = compressed;
Oodle.Decompress(compressed, compressedOffset, compressedSize, uncompressed, uncompressedOffset, uncompressedSize, reader);
return;
case CompressionMethod.LZ4:
var uncompressedBuffer = new byte[uncompressedSize + 4];
var result = LZ4Codec.Decode(compressed, compressedOffset, compressedSize, uncompressedBuffer, 0, uncompressedBuffer.Length);
Buffer.BlockCopy(uncompressedBuffer, 0, uncompressed, uncompressedOffset, uncompressedSize);
if (result != uncompressedSize)
{
throw new FileLoadException($"Failed to decompress LZ4 data (Expected: {uncompressedSize}, Result: {result})");
}
//var lz4 = LZ4Stream.Decode(srcStream);
//lz4.Read(uncompressed, uncompressedOffset, uncompressedSize);
//lz4.Dispose();
return;
default:
if (reader != null)
{
throw new UnknownCompressionMethodException(reader, $"Compression method \"{method}\" is unknown");
}
else
{
throw new UnknownCompressionMethodException($"Compression method \"{method}\" is unknown");
}
}
}
public static void Decompress(byte[] compressed, int compressedOffset, int compressedSize, byte[] uncompressed, int uncompressedOffset, int uncompressedSize, CompressionMethod method, FArchive?reader = null)
{
using var srcStream = new MemoryStream(compressed, compressedOffset, compressedSize, false)
{
Position = 0
};
switch (method)
{
case CompressionMethod.None:
Buffer.BlockCopy(compressed, compressedOffset, uncompressed, uncompressedOffset, compressedSize);
return;
case CompressionMethod.Zlib:
var zlib = new ZlibStream(srcStream, CompressionMode.Decompress);
zlib.Read(uncompressed, uncompressedOffset, uncompressedSize);
zlib.Dispose();
return;
case CompressionMethod.Gzip:
var gzip = new GZipStream(srcStream, CompressionMode.Decompress);
gzip.Read(uncompressed, uncompressedOffset, uncompressedSize);
gzip.Dispose();
return;
case CompressionMethod.Oodle:
Oodle.Decompress(compressed, compressedOffset, compressedSize, uncompressed, uncompressedOffset, uncompressedSize, reader);
return;
default:
if (reader != null)
{
throw new OodleException(reader, $"Compression method \"{method}\" is unknown");
}
else
{
throw new OodleException($"Compression method \"{method}\" is unknown");
}
}
}
