BitMiracle.LibJpeg.Classic.Internal.my_merged_upsampler.merged_2v_upsample C# (CSharp) 메소드

        private void merged_2v_upsample(ComponentBuffer[] input_buf, ref int in_row_group_ctr, byte[][] output_buf, ref int out_row_ctr, int out_rows_avail)
        {
            int num_rows;        /* number of rows returned to caller */
            if (m_spare_full)
            {
                /* If we have a spare row saved from a previous cycle, just return it. */
                byte[][] temp = new byte[1][];
                temp[0] = m_spare_row;
                JpegUtils.jcopy_sample_rows(temp, 0, output_buf, out_row_ctr, 1, m_out_row_width);
                num_rows = 1;
                m_spare_full = false;
            }
            else
            {
                /* Figure number of rows to return to caller. */
                num_rows = 2;

                /* Not more than the distance to the end of the image. */
                if (num_rows > m_rows_to_go)
                    num_rows = m_rows_to_go;
                
                /* And not more than what the client can accept: */
                out_rows_avail -= out_row_ctr;
                if (num_rows > out_rows_avail)
                    num_rows = out_rows_avail;
                
                /* Create output pointer array for upsampler. */
                byte[][] work_ptrs = new byte[2][];
                work_ptrs[0] = output_buf[out_row_ctr];
                if (num_rows > 1)
                {
                    work_ptrs[1] = output_buf[out_row_ctr + 1];
                }
                else
                {
                    work_ptrs[1] = m_spare_row;
                    m_spare_full = true;
                }

                /* Now do the upsampling. */
                h2v2_merged_upsample(input_buf, in_row_group_ctr, work_ptrs);
            }

            /* Adjust counts */
            out_row_ctr += num_rows;
            m_rows_to_go -= num_rows;

            /* When the buffer is emptied, declare this input row group consumed */
            if (!m_spare_full)
                in_row_group_ctr++;
        }