private bool FlushOodleCompressedBlock(MemoryStream data, int blockLength)
{
byte[] compressed = Oodle.Compress(this._BlockBytes, blockLength, OodleFormat.Kraken, OodleCompressionLevel.Normal);
Debug.Assert(compressed.Length != 0, "Compressed Block should not be empty");
data.WriteBytes(compressed);
// If it doesn't fit within the range of ratio, store as uncompressed.
if (!IsWithinCompressionRatio(compressed.Length, blockLength))
{
return(false);
}
var compressedLength = (int)data.Length;
if (data.Length < blockLength)
{
this._BaseStream.WriteValueS32(128 + compressedLength, this._Endian);
this._BaseStream.WriteValueU8(1);
CompressedBlockHeader compressedBlockHeader = new CompressedBlockHeader();
compressedBlockHeader.SetOodlePreset();
compressedBlockHeader.UncompressedSize = (uint)blockLength;
compressedBlockHeader.CompressedSize = (uint)compressedLength;
compressedBlockHeader.ChunkSize = 1;
compressedBlockHeader.Unknown0C = (uint)blockLength;
compressedBlockHeader.Chunks[0] = (ushort)compressedBlockHeader.CompressedSize;
Console.WriteLine(compressedBlockHeader);
compressedBlockHeader.Write(this._BaseStream, this._Endian);
this._BaseStream.Write(new byte[96], 0, 96); // Empty padding.
this._BaseStream.Write(data.GetBuffer(), 0, compressedLength);
this._BlockOffset = 0;
return(true);
}
return(false);
}
private bool FlushZlibCompressedBlock(MemoryStream data, int blockLength)
{
var zlib = new ZLibStream(data, CompressionMode.Compress, CompressionLevel.Level9);
zlib.Write(this._BlockBytes, 0, blockLength);
zlib.Flush();
var compressedLength = (int)data.Length;
if (data.Length < blockLength)
{
this._BaseStream.WriteValueS32(32 + compressedLength, this._Endian);
this._BaseStream.WriteValueU8(1);
CompressedBlockHeader compressedBlockHeader = new CompressedBlockHeader();
compressedBlockHeader.SetZlibPreset();
compressedBlockHeader.UncompressedSize = (uint)blockLength; //TODO: I think this should actually be alignment?
compressedBlockHeader.CompressedSize = (uint)compressedLength;
compressedBlockHeader.ChunkSize = (short)_Alignment;
compressedBlockHeader.Unknown0C = 135200769;
compressedBlockHeader.Chunks[0] = (ushort)compressedBlockHeader.CompressedSize;
compressedBlockHeader.Write(this._BaseStream, this._Endian);
this._BaseStream.Write(data.GetBuffer(), 0, compressedLength);
this._BlockOffset = 0;
zlib.Close();
zlib.Dispose();
return(true);
}
return(false);
}
