public Proba()
{
BandsPtr = new BandProbas[NumTypes][];
for (int i = 0; i < NumTypes; ++i)
BandsPtr[i] = new BandProbas[17];
}
public void Reset()
{
for (int i = 0; i < Segments.Length; ++i)
Segments[i] = 0xFF;
for (int t = 0; t < NumTypes; ++t)
for (int b = 0; b < NumBands; ++b)
{
Bands[t,b] = new BandProbas();
}
}
int GetCoeffs(BitReader br, BandProbas[] prob, int ctx, int[] dq, int n, short[] out_ptr, int dst)
{
var p = prob[n].Probas[ctx];
for (; n < 16; ++n)
{
if (0 == br.GetBit (p[0]))
return n; // previous coeff was last non-zero coeff
while (0 == br.GetBit (p[1])) // sequence of zero coeffs
{
p = prob[++n].Probas[0];
if (16 == n) return 16;
}
// non zero coeff
var p_ctx = prob[n + 1].Probas;
int v;
if (0 == br.GetBit (p[2]))
{
v = 1;
p = p_ctx[1];
}
else
{
v = br.GetLargeValue (p);
p = p_ctx[2];
}
out_ptr[dst+kZigzag[n]] = (short)(br.GetSigned (v) * dq[n > 0 ? 1 : 0]);
}
return 16;
}
