/// <summary>
/// Initializes a new instance of the <see cref="HuffmanScanDecoder"/> class.
/// </summary>
/// <param name="stream">The input stream.</param>
/// <param name="frame">The image frame.</param>
/// <param name="dcHuffmanTables">The DC Huffman tables.</param>
/// <param name="acHuffmanTables">The AC Huffman tables.</param>
/// <param name="componentsLength">The length of the components. Different to the array length.</param>
/// <param name="restartInterval">The reset interval.</param>
/// <param name="spectralStart">The spectral selection start.</param>
/// <param name="spectralEnd">The spectral selection end.</param>
/// <param name="successiveHigh">The successive approximation bit high end.</param>
/// <param name="successiveLow">The successive approximation bit low end.</param>
/// <param name="cancellationToken">The token to monitor cancellation.</param>
public HuffmanScanDecoder(
BufferedReadStream stream,
JpegFrame frame,
HuffmanTable[] dcHuffmanTables,
HuffmanTable[] acHuffmanTables,
int componentsLength,
int restartInterval,
int spectralStart,
int spectralEnd,
int successiveHigh,
int successiveLow,
CancellationToken cancellationToken)
{
this.dctZigZag = ZigZag.CreateUnzigTable();
this.stream = stream;
this.scanBuffer = new HuffmanScanBuffer(stream);
this.frame = frame;
this.dcHuffmanTables = dcHuffmanTables;
this.acHuffmanTables = acHuffmanTables;
this.components = frame.Components;
this.componentsLength = componentsLength;
this.restartInterval = restartInterval;
this.todo = restartInterval;
this.spectralStart = spectralStart;
this.spectralEnd = spectralEnd;
this.successiveHigh = successiveHigh;
this.successiveLow = successiveLow;
this.cancellationToken = cancellationToken;
}
public JpegComponent(JpegFrame frame, byte id, int horizontalFactor, int verticalFactor, byte quantizationTableIndex, int index)
{
this.Frame = frame;
this.Id = id;
// Validate sampling factors.
if (horizontalFactor == 0 || verticalFactor == 0)
{
JpegThrowHelper.ThrowBadSampling();
}
this.HorizontalSamplingFactor = horizontalFactor;
this.VerticalSamplingFactor = verticalFactor;
this.SamplingFactors = new Size(this.HorizontalSamplingFactor, this.VerticalSamplingFactor);
if (quantizationTableIndex > 3)
{
JpegThrowHelper.ThrowBadQuantizationTable();
}
this.QuantizationTableIndex = quantizationTableIndex;
this.Index = index;
}
