public void RleEncodeDecodeLongSequence()
{
byte[] bytes = new byte[] {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
255, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
};
byte[] encoded = Rle.Encode(bytes);
byte[] decoded = Rle.Decode(encoded);
Assert.Less(encoded.Length, bytes.Length);
Assert.AreEqual(bytes, decoded);
}
public void RleEncodeDecode()
{
byte[] bytes = new byte[] {
0, 0, 0, 0, 0, 0, 4, 2, 0, 4, 4, 4, 4, 4, 4, 4,
80, 80, 80, 80, 0, 2, 2, 2, 2, 255, 255, 255, 255, 255, 0, 0
};
byte[] encoded = Rle.Encode(bytes);
byte[] decoded = Rle.Decode(encoded);
Assert.Less(encoded.Length, bytes.Length);
Assert.AreEqual(bytes, decoded);
}
public Bitmap Decompress(CompressedImage compressedImage)
{
var unHuf = HuffmanCodec.Decode(compressedImage.DataBytes, compressedImage.DecodeTable, compressedImage.BitsCount);
var unRle = Rle <byte> .Decode(unHuf).ToArray();
var yDct = new List <double>();
var cbDct = new List <double>();
var crDct = new List <double>();
var countYBlocks = compressedImage.ThinIndex * compressedImage.ThinIndex;
var cellsToBlock = compressedImage.CompressionLevel;
for (var i = 0; i < unRle.Length;)
{
for (var j = 0; j < countYBlocks * cellsToBlock; j++)
{
yDct.Add(unRle[i++]);
}
for (var j = 0; j < cellsToBlock; j++)
{
cbDct.Add(unRle[i++]);
}
for (var j = 0; j < cellsToBlock; j++)
{
crDct.Add(unRle[i++]);
}
}
var yDctBlocks = DevideIntoPiece(yDct, compressedImage.CompressionLevel);
var cbDctBlocks = DevideIntoPiece(cbDct, compressedImage.CompressionLevel);
var crDctBlocks = DevideIntoPiece(crDct, compressedImage.CompressionLevel);
var yChannel = _dctDecompressor.Decompress(yDctBlocks, _dctSize, compressedImage.Height, compressedImage.Width, _lumiaMatrixProvider.GetMatrix());
var thinnedCbChannel = _dctDecompressor.Decompress(cbDctBlocks, _dctSize, compressedImage.Height / compressedImage.ThinIndex, compressedImage.Width / compressedImage.ThinIndex, _colorMatrixProvider.GetMatrix());
var thinnedCrChannel = _dctDecompressor.Decompress(crDctBlocks, _dctSize, compressedImage.Height / compressedImage.ThinIndex, compressedImage.Width / compressedImage.ThinIndex, _colorMatrixProvider.GetMatrix());
var cbChannel = _pieceMatrixExtender.Extend(thinnedCbChannel, compressedImage.ThinIndex);
var crChannel = _pieceMatrixExtender.Extend(thinnedCrChannel, compressedImage.ThinIndex);
var yCbCrChannels = new YCbCrChannels(yChannel, cbChannel, crChannel);
var yCbCrPixels = _iChannelsPacker.Pack(yCbCrChannels, compressedImage.Height, compressedImage.Width);
var matrixRgbPixels = MatrixYCbCrToRgbConverter.Convert(yCbCrPixels);
var bmp = _bitmapBuilder.Build(matrixRgbPixels);
return(bmp);
}
