private Dictionary <DefaultableSymbol <byte>, Dictionary <byte, int> > createSymbolDictionary()
{
var perSymbolDictionary = new Dictionary <DefaultableSymbol <byte>, Dictionary <byte, int> >();
DefaultableSymbol <byte> previousSymbol;
perSymbolDictionary.Add(new DefaultableSymbol <byte>(true), new Dictionary <byte, int>()
{
{ inputReader.Current, 1 }
});
previousSymbol = new DefaultableSymbol <byte>(inputReader.Current);
while (inputReader.MoveNext())
{
if (!perSymbolDictionary.ContainsKey(previousSymbol))
{
perSymbolDictionary.Add(previousSymbol, new Dictionary <byte, int>());
}
if (perSymbolDictionary[previousSymbol].ContainsKey(inputReader.Current))
{
++perSymbolDictionary[previousSymbol][inputReader.Current];
}
else
{
perSymbolDictionary[previousSymbol].Add(inputReader.Current, 1);
}
previousSymbol = new DefaultableSymbol <byte>(inputReader.Current);
}
;
inputReader.Reset();
this.symbolDictionary = perSymbolDictionary;
return(perSymbolDictionary);
}
public void Encode()
{
DefaultableSymbol <byte> previousSymbol;
Dictionary <DefaultableSymbol <byte>, ICoder <byte> > coderDictionary = createCoderDictionary();
coderDictionary[new DefaultableSymbol <byte>(true)].Encode(new MarkowHuffmanCoderInput(inputReader.Current), new HuffmanCoderOutput(coderOutputWriter));
previousSymbol = new DefaultableSymbol <byte>(inputReader.Current);
while (inputReader.MoveNext())
{
coderDictionary[previousSymbol].Encode(new MarkowHuffmanCoderInput(inputReader.Current), new HuffmanCoderOutput(coderOutputWriter));
previousSymbol = new DefaultableSymbol <byte>(inputReader.Current);
}
coderOutputWriter.CreateFileBytes(HuffmanEncodeModel.Markov, true, SymbolQuantityMapConverter.MarkowIntToExtConvert(this.symbolDictionary, CreateEncodingDictionaries(coderDictionary)));
}
public void Decode()
{
DefaultableSymbol <byte> previousSymbol;
Dictionary <DefaultableSymbol <byte>, IDecoder <byte> > decoderDictionary = createDecoderDictionary();
MarkowHuffmanDecoderOutput markowHuffmanDecoderOutput = new MarkowHuffmanDecoderOutput(decoderFileWriter);
decoderDictionary[new DefaultableSymbol <byte>(true)].Decode(new HuffmanDecoderInput(decoderReader), markowHuffmanDecoderOutput);
previousSymbol = new DefaultableSymbol <byte>(markowHuffmanDecoderOutput.DecodedSymbol);
int symbolsDecoded = 1;
while (symbolsDecoded < symbolsCount)
{
markowHuffmanDecoderOutput = new MarkowHuffmanDecoderOutput(decoderFileWriter);
decoderDictionary[previousSymbol].Decode(new HuffmanDecoderInput(decoderReader), markowHuffmanDecoderOutput);
previousSymbol = new DefaultableSymbol <byte>(markowHuffmanDecoderOutput.DecodedSymbol);
++symbolsDecoded;
}
}