public void ReverseEncode(RangeEncoder rangeEncoder, UInt32 symbol)
{
UInt32 m = 1;
for (UInt32 i = 0; i < _numBitLevels; i++)
{
UInt32 bit = symbol & 1;
_models[m].Encode(rangeEncoder, bit);
m = (m << 1) | bit;
symbol >>= 1;
}
}
public void Encode(RangeEncoder rangeEncoder, UInt32 symbol)
{
UInt32 m = 1;
for (int bitIndex = _numBitLevels; bitIndex > 0;)
{
bitIndex--;
UInt32 bit = (symbol >> bitIndex) & 1;
_models[m].Encode(rangeEncoder, bit);
m = (m << 1) | bit;
}
}
public static void ReverseEncode(RangeBitEncoder[] Models, UInt32 startIndex,
RangeEncoder rangeEncoder, int NumBitLevels, UInt32 symbol)
{
UInt32 m = 1;
for (int i = 0; i < NumBitLevels; i++)
{
UInt32 bit = symbol & 1;
Models[startIndex + m].Encode(rangeEncoder, bit);
m = (m << 1) | bit;
symbol >>= 1;
}
}
public void Encode(RangeEncoder encoder, uint symbol)
{
// encoder.EncodeBit(Prob, kNumBitModelTotalBits, symbol);
// UpdateModel(symbol);
uint newBound = (encoder.Range >> kNumBitModelTotalBits) * _prob;
if (symbol == 0)
{
encoder.Range = newBound;
_prob += (kBitModelTotal - _prob) >> kNumMoveBits;
}
else
{
encoder.Low += newBound;
encoder.Range -= newBound;
_prob -= (_prob) >> kNumMoveBits;
}
if (encoder.Range < RangeEncoder.kTopValue)
{
encoder.Range <<= 8;
encoder.ShiftLow();
}
}