/// <summary>
/// Renormalizes the working state by outputting the LSB into
/// the ANS bitstream.
/// </summary>
/// <param name="symbol">Current working symbol.</param>
/// <param name="output">Output ANS bitstream.</param>
/// <param name="state">Working state.</param>
public void EncodeRenormalizeState(int symbol, BitStreamIO.Writer output, ref int state)
{
while (state >= (Config.FrequencyCounts[symbol] << 1))
{
output.PutBit((state & 1));
state >>= 1;
}
}
/// <summary>
/// Encodes a list of bytes into metadata and bitstream.
/// </summary>
/// <param name="input">Input byte list</param>
public BitStream EncodeANSBitStream(List <byte> input)
{
var Input = new SymbolStreamIO.Reader(input);
var Output = new BitStreamIO.Writer();
int state = Config.TotalFrequencyCounts;
int symbol;
while (Input.HasData())
{
symbol = Input.GetSymbol();
EncodeRenormalizeState(symbol, Output, ref state);
EncodeSymbol(symbol, ref state);
}
Output.Terminate(input.Count, state);
return(Output.BitStream);
}
