org.diracvideo.Jirac.Arithmetic.DecodeBool C# (CSharp) Method

        public bool DecodeBool(int context)
        {
            bool v;
            int range_times_prob, lut_index;
            range_times_prob =
                (range * probabilities[context]) >> 16;
            v = (code - low >= range_times_prob);
            lut_index = probabilities[context] >> 8 | (v ? 256 : 0);
            probabilities[context] += lut[lut_index];
            if(v) {
                low += range_times_prob;
                range -= range_times_prob;
            } else {
                range = range_times_prob;
            }

            while(range <= 0x4000) {
                low <<= 1;
                range <<= 1;
                code <<= 1;
                code |= (shift >> (7-cntr))&1;
                cntr++;
                if(cntr == 8) {
                offset++;
                if(offset < size) {
                    shift = data[offset];
                } else {
                    shift = (byte)0xff;
                }
                low &= 0xffff;
                code &= 0xffff;
                if(code < low) {
                    code |= (1<<16);
                }
                cntr = 0;
                }
            }
            return v;
        }

 /* Maybe we should rewrite this namespace blocks.
  * I'm not sure */
 public void DecodeCoeffs(ref short[] c)
 {
     if(buf == null)
         return;
     int[] bounds = {0,0,0};
     if(par.no_ac) {
         Unpack u = new Unpack(buf);
         if(numX * numY == 1) {
         bounds[1] = c.Length;
         bounds[2] = frame.Width;
         DecodeCodeBlock(ref c,u,bounds);
         return;
         }
         for(int y = 0; y < numY; y++) {
         for(int x = 0; x < numX; x++) {
             if(u.DecodeBool())
             continue;
             if(par.codeblock_mode_index != 0)
             qi += u.DecodeSint();
             CalculateBounds(bounds,x,y);
             DecodeCodeBlock(ref c,u,bounds);
         }
     }
     } else {
         Arithmetic a = new Arithmetic(buf);
         if(numX * numY == 1) {
         bounds[1] = c.Length;
         bounds[2] = frame.Width;
         DecodeCodeBlock(ref c, a, bounds);
         return;
         }
         for(int y = 0; y < numY; y++) {
             for(int x = 0; x < numX; x++) {
                 if(a.DecodeBool(Context.ZERO_CODEBLOCK))
                 continue;
                 if(par.codeblock_mode_index != 0)
                     qi += a.DecodeSint(Context.QUANTISER_CONT,
                            Context.QUANTISER_VALUE,
                            Context.QUANTISER_SIGN);
                 CalculateBounds(bounds, x, y);
                 DecodeCodeBlock(ref c, a, bounds);
             }
         }
     }
 }