/// <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>
public HuffmanScanDecoder(
DoubleBufferedStreamReader stream,
JpegFrame frame,
HuffmanTable[] dcHuffmanTables,
HuffmanTable[] acHuffmanTables,
int componentsLength,
int restartInterval,
int spectralStart,
int spectralEnd,
int successiveHigh,
int successiveLow)
{
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;
}
/// <summary>
/// Decodes the entropy coded data.
/// </summary>
public void ParseEntropyCodedData(int componentCount)
{
this.cancellationToken.ThrowIfCancellationRequested();
this.componentsCount = componentCount;
this.scanBuffer = new HuffmanScanBuffer(this.stream);
bool fullScan = this.frame.Progressive || this.frame.MultiScan;
this.frame.AllocateComponents(fullScan);
if (!this.frame.Progressive)
{
this.ParseBaselineData();
}
else
{
this.ParseProgressiveData();
}
if (this.scanBuffer.HasBadMarker())
{
this.stream.Position = this.scanBuffer.MarkerPosition;
}
}