public void PostProcess <TPixel>(TestImageProvider <TPixel> provider)
where TPixel : unmanaged, IPixel <TPixel>
{
string imageFile = provider.SourceFileOrDescription;
using (JpegDecoderCore decoder = JpegFixture.ParseJpegStream(imageFile))
using (var pp = new JpegImagePostProcessor(Configuration.Default, decoder))
using (var image = new Image <Rgba32>(decoder.ImageWidth, decoder.ImageHeight))
{
pp.PostProcess(image.Frames.RootFrame);
image.DebugSave(provider);
ImagingTestCaseUtility testUtil = provider.Utility;
testUtil.TestGroupName = nameof(JpegDecoderTests);
testUtil.TestName = JpegDecoderTests.DecodeBaselineJpegOutputName;
using (Image <TPixel> referenceImage =
provider.GetReferenceOutputImage <TPixel>(appendPixelTypeToFileName: false))
{
ImageSimilarityReport report = ImageComparer.Exact.CompareImagesOrFrames(referenceImage, image);
this.Output.WriteLine($"*** {imageFile} ***");
this.Output.WriteLine($"Difference: {report.DifferencePercentageString}");
// ReSharper disable once PossibleInvalidOperationException
Assert.True(report.TotalNormalizedDifference.Value < 0.005f);
}
}
}
public void ColorSpace_IsDeducedCorrectly(string imageFile, object expectedColorSpaceValue)
{
var expectedColorSpace = (JpegColorSpace)expectedColorSpaceValue;
using (JpegDecoderCore decoder = JpegFixture.ParseJpegStream(imageFile))
{
Assert.Equal(expectedColorSpace, decoder.ColorSpace);
}
}
public void LLM_IDCT_IsEquivalentTo_AccurateImplementation(int seed, int range)
{
float[] sourceArray = JpegFixture.Create8x8RoundedRandomFloatData(-range, range, seed);
var source = Block8x8F.Load(sourceArray);
Block8x8F expected = ReferenceImplementations.AccurateDCT.TransformIDCT(ref source);
Block8x8F actual = ReferenceImplementations.LLM_FloatingPoint_DCT.TransformIDCT(ref source);
this.CompareBlocks(expected, actual, 0.1f);
}
public void LLM_ForwardThenInverse(int seed, int startAt)
{
int[] data = JpegFixture.Create8x8RandomIntData(-1000, 1000, seed);
float[] original = data.ConvertAllToFloat();
float[] src = data.ConvertAllToFloat();
float[] dest = new float[64];
float[] temp = new float[64];
ReferenceImplementations.LLM_FloatingPoint_DCT.fDCT2D_llm(src, dest, temp, true);
ReferenceImplementations.LLM_FloatingPoint_DCT.iDCT2D_llm(dest, src, temp);
this.CompareBlocks(original, src, 0.1f);
}
public void ForwardThenInverse(int seed)
{
float[] data = JpegFixture.Create8x8RandomFloatData(-1000, 1000, seed);
var b0 = default(Block8x8F);
b0.LoadFrom(data);
Block8x8F b1 = ReferenceImplementations.AccurateDCT.TransformFDCT(ref b0);
Block8x8F b2 = ReferenceImplementations.AccurateDCT.TransformIDCT(ref b1);
this.CompareBlocks(b0, b2, 1e-4f);
}
public void GT_IDCT_IsEquivalentTo_AccurateImplementation(int seed, int range)
{
int[] intData = JpegFixture.Create8x8RandomIntData(-range, range, seed);
float[] floatSrc = intData.ConvertAllToFloat();
ReferenceImplementations.AccurateDCT.TransformIDCTInplace(intData);
float[] dest = new float[64];
ReferenceImplementations.GT_FloatingPoint_DCT.iDCT8x8GT(floatSrc, dest);
this.CompareBlocks(intData.ConvertAllToFloat(), dest, 1f);
}
public void LLM_FDCT_IsEquivalentTo_AccurateImplementation(int seed)
{
float[] floatData = JpegFixture.Create8x8RandomFloatData(-1000, 1000);
Block8x8F source = default;
source.LoadFrom(floatData);
Block8x8F expected = ReferenceImplementations.AccurateDCT.TransformFDCT(ref source);
Block8x8F actual = ReferenceImplementations.LLM_FloatingPoint_DCT.TransformFDCT_UpscaleBy8(ref source);
actual /= 8;
this.CompareBlocks(expected, actual, 1f);
}
public void LLM_TransformIDCT_CompareToAccurate(int seed)
{
float[] sourceArray = JpegFixture.Create8x8RoundedRandomFloatData(-1000, 1000, seed);
var source = Block8x8F.Load(sourceArray);
Block8x8F expected = ReferenceImplementations.AccurateDCT.TransformIDCT(ref source);
var temp = default(Block8x8F);
var actual = default(Block8x8F);
FastFloatingPointDCT.TransformIDCT(ref source, ref actual, ref temp);
this.CompareBlocks(expected, actual, 1f);
}
public void PrintComponentData(string imageFile)
{
var sb = new StringBuilder();
using (JpegDecoderCore decoder = JpegFixture.ParseJpegStream(imageFile))
{
sb.AppendLine(imageFile);
sb.AppendLine($"Size:{decoder.ImageSizeInPixels} MCU:{decoder.ImageSizeInMCU}");
JpegComponent c0 = decoder.Components[0];
JpegComponent c1 = decoder.Components[1];
sb.AppendLine($"Luma: SAMP: {c0.SamplingFactors} BLOCKS: {c0.SizeInBlocks}");
sb.AppendLine($"Chroma: {c1.SamplingFactors} BLOCKS: {c1.SizeInBlocks}");
}
this.Output.WriteLine(sb.ToString());
}
public void ComponentScalingIsCorrect_1ChannelJpeg()
{
using (JpegDecoderCore decoder = JpegFixture.ParseJpegStream(TestImages.Jpeg.Baseline.Jpeg400))
{
Assert.Equal(1, decoder.ComponentCount);
Assert.Equal(1, decoder.Components.Length);
Size expectedSizeInBlocks = decoder.ImageSizeInPixels.DivideRoundUp(8);
Assert.Equal(expectedSizeInBlocks, decoder.ImageSizeInMCU);
var uniform1 = new Size(1, 1);
JpegComponent c0 = decoder.Components[0];
VerifyJpeg.VerifyComponent(c0, expectedSizeInBlocks, uniform1, uniform1);
}
}
public void DoProcessorStep <TPixel>(TestImageProvider <TPixel> provider)
where TPixel : unmanaged, IPixel <TPixel>
{
string imageFile = provider.SourceFileOrDescription;
using (JpegDecoderCore decoder = JpegFixture.ParseJpegStream(imageFile))
using (var pp = new JpegImagePostProcessor(Configuration.Default, decoder))
using (var imageFrame = new ImageFrame <Rgba32>(Configuration.Default, decoder.ImageWidth, decoder.ImageHeight))
{
pp.DoPostProcessorStep(imageFrame);
JpegComponentPostProcessor[] cp = pp.ComponentProcessors;
SaveBuffer(cp[0], provider);
SaveBuffer(cp[1], provider);
SaveBuffer(cp[2], provider);
}
}
public void FDCT8x4_RightPart(int seed)
{
Span <float> src = JpegFixture.Create8x8RoundedRandomFloatData(-200, 200, seed);
var srcBlock = new Block8x8F();
srcBlock.LoadFrom(src);
var destBlock = new Block8x8F();
float[] expectedDest = new float[64];
ReferenceImplementations.LLM_FloatingPoint_DCT.fDCT2D8x4_32f(src.Slice(4), expectedDest.AsSpan(4));
FastFloatingPointDCT.FDCT8x4_RightPart(ref srcBlock, ref destBlock);
float[] actualDest = new float[64];
destBlock.CopyTo(actualDest);
Assert.Equal(actualDest, expectedDest, new ApproximateFloatComparer(1f));
}
public void TransformFDCT(int seed)
{
Span <float> src = JpegFixture.Create8x8RoundedRandomFloatData(-200, 200, seed);
var srcBlock = new Block8x8F();
srcBlock.LoadFrom(src);
var destBlock = new Block8x8F();
float[] expectedDest = new float[64];
float[] temp1 = new float[64];
var temp2 = new Block8x8F();
ReferenceImplementations.LLM_FloatingPoint_DCT.fDCT2D_llm(src, expectedDest, temp1, downscaleBy8: true);
FastFloatingPointDCT.TransformFDCT(ref srcBlock, ref destBlock, ref temp2, false);
float[] actualDest = new float[64];
destBlock.CopyTo(actualDest);
Assert.Equal(actualDest, expectedDest, new ApproximateFloatComparer(1f));
}
public void ForwardThenInverse(int seed, int startAt)
{
Span <int> original = JpegFixture.Create8x8RandomIntData(-200, 200, seed);
Span <int> block = original.AddScalarToAllValues(128);
ReferenceImplementations.StandardIntegerDCT.Subtract128_TransformFDCT_Upscale8_Inplace(block);
for (int i = 0; i < 64; i++)
{
block[i] /= 8;
}
ReferenceImplementations.StandardIntegerDCT.TransformIDCTInplace(block);
for (int i = startAt; i < 64; i++)
{
float expected = original[i];
float actual = (float)block[i];
Assert.Equal(expected, actual, new ApproximateFloatComparer(3f));
}
}
public void ComponentScalingIsCorrect_MultiChannelJpeg(
string imageFile,
int componentCount,
object expectedLumaFactors,
object expectedChromaFactors)
{
var fLuma = (Size)expectedLumaFactors;
var fChroma = (Size)expectedChromaFactors;
using (JpegDecoderCore decoder = JpegFixture.ParseJpegStream(imageFile))
{
Assert.Equal(componentCount, decoder.ComponentCount);
Assert.Equal(componentCount, decoder.Components.Length);
JpegComponent c0 = decoder.Components[0];
JpegComponent c1 = decoder.Components[1];
JpegComponent c2 = decoder.Components[2];
var uniform1 = new Size(1, 1);
Size expectedLumaSizeInBlocks = decoder.ImageSizeInMCU.MultiplyBy(fLuma);
Size divisor = fLuma.DivideBy(fChroma);
Size expectedChromaSizeInBlocks = expectedLumaSizeInBlocks.DivideRoundUp(divisor);
VerifyJpeg.VerifyComponent(c0, expectedLumaSizeInBlocks, fLuma, uniform1);
VerifyJpeg.VerifyComponent(c1, expectedChromaSizeInBlocks, fChroma, divisor);
VerifyJpeg.VerifyComponent(c2, expectedChromaSizeInBlocks, fChroma, divisor);
if (componentCount == 4)
{
JpegComponent c3 = decoder.Components[2];
VerifyJpeg.VerifyComponent(c3, expectedLumaSizeInBlocks, fLuma, uniform1);
}
}
}
public void iDCT2D8x4_RightPart()
{
float[] sourceArray = JpegFixture.Create8x8FloatData();
float[] expectedDestArray = new float[64];
ReferenceImplementations.LLM_FloatingPoint_DCT.iDCT2D8x4_32f(sourceArray.AsSpan(4), expectedDestArray.AsSpan(4));
var source = new Block8x8F();
source.LoadFrom(sourceArray);
var dest = new Block8x8F();
FastFloatingPointDCT.IDCT8x4_RightPart(ref source, ref dest);
float[] actualDestArray = new float[64];
dest.CopyTo(actualDestArray);
this.Print8x8Data(expectedDestArray);
this.Output.WriteLine("**************");
this.Print8x8Data(actualDestArray);
Assert.Equal(expectedDestArray, actualDestArray);
}
