public void JpegFrameEncoderDecoderTest()
{
// Encode and decode a basic raster structure.
var colorModel = new ColorModel();
colorModel.ColorSpace = ColorSpace.YCbCr;
colorModel.Opaque = true;
byte[][][] originalRaster = GetRaster();
var image = new Image(colorModel, originalRaster);
var stream = new MemoryStream();
var ctx = new JpegFrameContext(50, height, width);
var encoder = new JpegFrameEncoder(image, stream, ctx);
encoder.Encode();
stream.Seek(0, SeekOrigin.Begin);
var decoder = new JpegFrameDecoder(stream, ctx);
byte[][][] decodedRaster = Image.GetRaster(width, height, 3);
decoder.Decode(decodedRaster);
// Check that the returned raster structure looks something like what we passed in.
for (int i = 0; i < 3; i++)
{
for (int j = 0; j < width; j++)
{
for (int k = 0; k < height; k++)
{
// Tune this.
int diff = Math.Abs(decodedRaster[i][j][k] - originalRaster[i][j][k]);
Assert.IsTrue(diff < 5);
}
}
}
}
public void Decode()
{
// Get the raster image.
Debug.Assert(JpegQuality > 0 && JpegQuality <= 100);
EncodedStream.Position = 0;
var ctx = contextFactory.GetJpegFrameContext(JpegQuality, BlockType);
var decoder = new JpegFrameDecoder(EncodedStream, ctx);
decoder.Decode(rasterBuffer);
GetUpsampledRgba(rasterBuffer, BlockType == BlockType.Jpeg ? RgbaRaw : RgbaDelta);
}