internal See2Context MakeEscFreq(ModelPpm model, int numMasked, out int escFreq)
{
See2Context psee2C;
int numStats = NumStats;
int nonMasked = numStats - numMasked;
if (numStats != 256)
{
PpmContext suff = GetTempPpmContext(model.Heap);
suff.Address = GetSuffix();
int idx1 = model.GetNs2Indx()[nonMasked - 1];
int idx2 = 0;
idx2 += ((nonMasked < suff.NumStats - numStats) ? 1 : 0);
idx2 += 2 * ((_freqData.SummFreq < 11 * numStats) ? 1 : 0);
idx2 += 4 * ((numMasked > nonMasked) ? 1 : 0);
idx2 += model.HiBitsFlag;
psee2C = model.GetSee2Cont()[idx1][idx2];
escFreq = psee2C.Mean;
}
else
{
psee2C = model.DummySee2Cont;
escFreq = 1;
}
return(psee2C);
}
private See2Context MakeEscFreq2(ModelPpm model, int diff)
{
See2Context psee2C;
int numStats = NumStats;
if (numStats != 256)
{
PpmContext suff = GetTempPpmContext(model.Heap);
suff.Address = GetSuffix();
int idx1 = model.GetNs2Indx()[diff - 1];
int idx2 = 0;
idx2 += ((diff < suff.NumStats - numStats) ? 1 : 0);
idx2 += 2 * ((_freqData.SummFreq < 11 * numStats) ? 1 : 0);
idx2 += 4 * ((model.NumMasked > diff) ? 1 : 0);
idx2 += model.HiBitsFlag;
psee2C = model.GetSee2Cont()[idx1][idx2];
model.Coder.SubRange.Scale = psee2C.Mean;
}
else
{
psee2C = model.DummySee2Cont;
model.Coder.SubRange.Scale = 1;
}
return(psee2C);
}
