public Bitmap Decompress()
{
// Load blocks
Quantizer quantizer = new Quantizer();
List <List <Block <short> > > channelBlocks = RunLength.RLD(compressedData, 8, width, height, quantizer.GetLumiQT(), quantizer.GetChromaQT());
Block <byte> yChannel = DCT.IDCTChannel(channelBlocks[0], width, height);
Block <byte> cbChannel = DCT.IDCTChannel(channelBlocks[1], width / 2, height / 2);
Block <byte> crChannel = DCT.IDCTChannel(channelBlocks[2], width / 2, height / 2);
Block <byte> cbPadded = cbChannel.PadBlock(2);
Block <byte> crPadded = crChannel.PadBlock(2);
List <byte> uncompressed = LoadImageData(yChannel, cbPadded, crPadded);
return(CreateBitmapFromBytes(width, height, uncompressed));
}
public List <byte> Compress()
{
List <Block <short> > yccChannels = ColourConverter.BitmapRGBToYCC(this.bitmap, 8);
Block <short> cbCulled = yccChannels[1].CullBlockToBlockFactor(2, 8);
Block <short> crCulled = yccChannels[2].CullBlockToBlockFactor(2, 8);
List <Block <short> > yBlocks = DCT.DCTChannel(yccChannels[0], 8);
List <Block <short> > cbBlocks = DCT.DCTChannel(cbCulled, 8);
List <Block <short> > crBlocks = DCT.DCTChannel(crCulled, 8);
Quantizer quantizer = new Quantizer();
List <byte> yStream = RunLength.RLE(yBlocks, quantizer.GetLumiQT());
List <byte> cbStream = RunLength.RLE(cbBlocks, quantizer.GetChromaQT());
List <byte> crStream = RunLength.RLE(crBlocks, quantizer.GetChromaQT());
yStream.AddRange(cbStream);
yStream.AddRange(crStream);
return(yStream);
}
