BitMiracle.LibJpeg.Classic.Internal.huff_entropy_decoder.decode_mcu_DC_refine C# (CSharp) Method

        private bool decode_mcu_DC_refine(JBLOCK[] MCU_data)
        {
            /* Process restart marker if needed; may have to suspend */
            if (m_cinfo.m_restart_interval != 0)
            {
                if (m_restarts_to_go == 0)
                {
                    if (!process_restart())
                        return false;
                }
            }

            /* Not worth the cycles to check insufficient_data here,
             * since we will not change the data anyway if we read zeroes.
             */

            /* Load up working state */
            int get_buffer;
            int bits_left;
            bitread_working_state br_state = new bitread_working_state();
            BITREAD_LOAD_STATE(m_bitstate, out get_buffer, out bits_left, ref br_state);

            int p1 = 1 << m_cinfo.m_Al;

            /* Outer loop handles each block in the MCU */

            for (int blkn = 0; blkn < m_cinfo.m_blocks_in_MCU; blkn++)
            {
                /* Encoded data is simply the next bit of the two's-complement DC value */
                if (!CHECK_BIT_BUFFER(ref br_state, 1, ref get_buffer, ref bits_left))
                    return false;

                if (GET_BITS(1, get_buffer, ref bits_left) != 0)
                {
                    /* 1 in the bit position being coded */
                    MCU_data[blkn][0] = (short)((ushort)MCU_data[blkn][0] | p1);
                }

                /* Note: since we use |=, repeating the assignment later is safe */
            }

            /* Completed MCU, so update state */
            BITREAD_SAVE_STATE(ref m_bitstate, get_buffer, bits_left);

            /* Account for restart interval (no-op if not using restarts) */
            m_restarts_to_go--;

            return true;
        }