public TreeWalker(HuffmanTreeBase tree, IDecodingInputStream input, IDecodingOutputStream output, long seqLength)
{
this.tree = tree;
this.input = input;
this.output = output;
this.seqLength = seqLength;
}
public void Decode(IDecodingOutputStream outputStream, CancellationToken cancellationToken, IProgressHandler progress)
{
decoder.Decode(inputStream, weightsTable, outputStream, length, cancellationToken, progress);
int trailingBitCount = MathHelper.ModAdv(length, 8);
for (int n = 0; n < trailingBitCount; n++)
{
inputStream.ReadBit(out _);
}
}
public void Decode(IDecodingInputStream inputStream, HuffmanTreeBase tree, IDecodingOutputStream outputStream, long sequenceLength, CancellationToken cancellationToken, IProgressHandler progress)
{
Guard.IsNotNull(inputStream, nameof(inputStream));
Guard.IsNotNull(tree, nameof(tree));
Guard.IsNotNull(outputStream, nameof(outputStream));
Guard.IsNotNegative(sequenceLength, nameof(sequenceLength));
const int chunkSize = 0x20000 * 8; // 128Kb
long progressValue = progress?.State.CastTo <CodingProgressState>()?.Value ?? 0;
long streamPosition = inputStream.Position;
TreeWalker walker = new TreeWalker(tree, inputStream, outputStream, sequenceLength);
while (!walker.Exhausted && !inputStream.IsEmpty)
{
if (!tree.Walk(walker))
{
throw new ArgumentException();
}
// Throttling
progressValue += inputStream.Position - streamPosition;
streamPosition = inputStream.Position;
if (progressValue >= chunkSize)
{
cancellationToken.ThrowIfCancellationRequested();
progress?.Report(progressValue / 8, outputStream.Path);
progressValue %= 8;
}
}
if (progress != null)
{
CodingProgressState progressState = (CodingProgressState)progress.State ?? new CodingProgressState();
progress.State = progressState.WithValue(progressValue);
}
}
public void Decode(IDecodingInputStream inputStream, WeightsTable weightsTable, IDecodingOutputStream outputStream, long sequenceLength, CancellationToken cancellationToken, IProgressHandler progress)
{
Guard.IsNotNull(inputStream, nameof(inputStream));
Guard.IsNotNull(weightsTable, nameof(weightsTable));
Guard.IsNotNull(outputStream, nameof(outputStream));
Guard.IsNotNegative(sequenceLength, nameof(sequenceLength));
HuffmanTreeBase tree = new HuffmanEncoder().BuildHuffmanTree(weightsTable);
Decode(inputStream, tree, outputStream, sequenceLength, cancellationToken, progress);
}
void IFileDecoder.Decode(IDecodingOutputStream outputStream, CancellationToken cancellationToken, IProgressHandler progress)
{
Trace += "->Decode;";
}
