public static byte[] Decompress(Stream stream)
{
using (var reader = new ImprovedBinaryReader(stream, true))
{
var header = reader.ReadInt32();
var method = (Method)(header & 0x07);
var size = header >> 3;
switch (method)
{
case Method.NoCompression:
return(reader.ReadBytes(size));
case Method.LZ10:
return(LZ10.Decompress(reader.BaseStream, size));
case Method.RLE:
return(RLE.Decompress(reader.BaseStream, size));
case Method.Huffman4Bit:
return(Huffman.Decompress(reader.BaseStream, 4, size));
case Method.Huffman8Bit:
return(Huffman.Decompress(reader.BaseStream, 8, size));
default:
throw new NotImplementedException($"Unsupported compression method: {method}");
}
}
}
public static byte[] Compress(Stream stream, Method method)
{
var methodAndSize = (uint)stream.Length << 3;
using (var ms = new MemoryStream())
{
switch (method)
{
case Method.LZ10:
methodAndSize |= 0x1;
using (var bw = new ImprovedBinaryWriter(ms))
{
bw.Write(methodAndSize);
var data = LZ10.Compress(stream);
bw.Write(data);
return(ms.ToArray());
}
default:
throw new InvalidDataException("Invalid method specified.");
}
}
}