public static byte[] Decompress(byte[] b)
{
using (var br = new FileReader(new MemoryStream(b), true))
{
var ms = new System.IO.MemoryStream();
br.BaseStream.Position = 2;
using (var ds = new DeflateStream(new MemoryStream(br.ReadBytes((int)br.BaseStream.Length - 6)), CompressionMode.Decompress))
ds.CopyTo(ms);
return(ms.ToArray());
}
}
//From https://github.com/IcySon55/Kuriimu/blob/f670c2719affc1eaef8b4c40e40985881247acc7/src/Kontract/Compression/LZSS.cs
//Todo does not work with Paper Mario Color Splash
public static byte[] Decompress(byte[] data, uint decompressedLength)
{
using (FileReader reader = new FileReader(new MemoryStream(data), true))
{
List <byte> result = new List <byte>();
for (int i = 0, flags = 0; ; i++)
{
if (i % 8 == 0)
{
flags = reader.ReadByte();
}
if ((flags & 0x80) == 0)
{
result.Add(reader.ReadByte());
}
else
{
int lengthDist = BitConverter.ToUInt16(reader.ReadBytes(2).Reverse().ToArray(), 0);
int offs = lengthDist % 4096 + 1;
int length = lengthDist / 4096 + 3;
while (length > 0)
{
result.Add(result[result.Count - offs]);
length--;
}
}
if (result.Count == decompressedLength)
{
return(result.ToArray());
}
else if (result.Count > decompressedLength)
{
throw new InvalidDataException("Went past the end of the stream");
}
flags <<= 1;
}
}
}
