public JpegFrameContext(byte quality, ushort height, ushort width,
JpegQuantizationTable luminance = null, JpegQuantizationTable chrominance = null, byte[] hSampFactor = null, byte[] vSampFactor = null)
{
Quality = quality;
Height = height;
Width = width;
HSampFactor = hSampFactor ?? FrameDefaults.HSampFactor;
VSampFactor = vSampFactor ?? FrameDefaults.VSampFactor;
Luminance = luminance ?? JpegQuantizationTable.K1Luminance;
Chrominance = chrominance ?? JpegQuantizationTable.K2Chrominance;
DCT = new DCT(Quality, Luminance, Chrominance);
HuffmanTable = HuffmanTable.GetHuffmanTable(null);
JpegFrame = new JpegFrame();
JpegFrame.ScanLines = height;
JpegFrame.SamplesPerLine = width;
JpegFrame.Precision = 8; // Number of bits per sample
JpegFrame.ComponentCount = FrameDefaults.NumberOfComponents; // Number of components (Y, Cb, Cr)
var qTables = new JpegQuantizationTable[2];
qTables[0] = JpegQuantizationTable.GetJpegQuantizationTable(DCT.quantum[0]);
qTables[1] = JpegQuantizationTable.GetJpegQuantizationTable(DCT.quantum[1]);
for (byte i = 0; i < FrameDefaults.NumberOfComponents; i++)
{
JpegFrame.AddComponent(FrameDefaults.CompId[i], HSampFactor[i], VSampFactor[i], qTables[FrameDefaults.QtableNumber[i]]);
JpegFrame.SetHuffmanTables(FrameDefaults.CompId[i], JpegFrame.AcTables[FrameDefaults.ACtableNumber[i]], JpegFrame.DcTables[FrameDefaults.DCtableNumber[i]]);
}
}
public override void InjectFrameData(JpegFrame frame, IRawJpegData jpegData)
{
this.frame = frame;
var spectralComponents = new LibJpegTools.ComponentData[frame.ComponentCount];
for (int i = 0; i < spectralComponents.Length; i++)
{
JpegComponent component = frame.Components[i];
spectralComponents[i] = new LibJpegTools.ComponentData(component.WidthInBlocks, component.HeightInBlocks, component.Index);
}
this.spectralData = new LibJpegTools.SpectralData(spectralComponents);
}
public override void InjectFrameData(JpegFrame frame, IRawJpegData jpegData)
{
}
/// <inheritdoc/> protected override JpegColorConverter GetColorConverter(JpegFrame frame, IRawJpegData jpegData) => JpegColorConverter.GetConverter(JpegColorSpace.RGB, frame.Precision);