BitMiracle.LibJpeg.Classic.Internal.huff_entropy_decoder.HUFF_DECODE C# (CSharp) 메소드

        private static bool HUFF_DECODE(out int result, ref bitread_working_state state, d_derived_tbl htbl, ref int get_buffer, ref int bits_left)
        {
            int nb = 0;
            bool doSlow = false;

            if (bits_left < JpegConstants.HUFF_LOOKAHEAD)
            {
                if (!jpeg_fill_bit_buffer(ref state, get_buffer, bits_left, 0))
                {
                    result = -1;
                    return false;
                }

                get_buffer = state.get_buffer;
                bits_left = state.bits_left;
                if (bits_left < JpegConstants.HUFF_LOOKAHEAD)
                {
                    nb = 1;
                    doSlow = true;
                }
            }

            if (!doSlow)
            {
                int look = PEEK_BITS(JpegConstants.HUFF_LOOKAHEAD, get_buffer, bits_left);
                if ((nb = htbl.look_nbits[look]) != 0)
                {
                    DROP_BITS(nb, ref bits_left);
                    result = htbl.look_sym[look];
                    return true;
                }

                nb = JpegConstants.HUFF_LOOKAHEAD + 1;
            }

            result = jpeg_huff_decode(ref state, get_buffer, bits_left, htbl, nb);
            if (result < 0)
                return false;

            get_buffer = state.get_buffer;
            bits_left = state.bits_left;

            return true;
        }