FluxJpeg.Core.Decoder.JpegComponent.DecodeACFirst C# (CSharp) Method

        public void DecodeACFirst(JPEGBinaryReader stream, float[] zz)
        {
            if (stream.eob_run > 0)
            {
                stream.eob_run--;
                return;
            }

            for (int k = spectralStart; k <= spectralEnd; k++)
            {
                int s = ACTable.Decode(stream);
                int r = s >> 4;
                s &= 15;


                if (s != 0)
                {
                    k += r;

                    r = (int)stream.ReadBits(s);
                    s = (int)HuffmanTable.Extend(r, s);
                    zz[k] = s << successiveLow;
                }
                else
                {
                    if (r != 15)
                    {
                        stream.eob_run = 1 << r;
                        
                        if (r != 0)
                            stream.eob_run += stream.ReadBits(r);

                        stream.eob_run--;

                        break;
                    }

                    k += 15;
                }
            }
        }