/// <summary> /// Initialize master compression control. /// </summary> private void jinit_c_master_control(bool transcode_only) { /* Validate parameters, determine derived values */ initial_setup(); if (m_scan_info != null) { validate_script(); } else { m_progressive_mode = false; m_num_scans = 1; } if (m_progressive_mode) /* TEMPORARY HACK ??? */ m_optimize_coding = true; /* assume default tables no good for progressive mode */ m_master = new jpeg_comp_master(this, transcode_only); }
/// <summary> /// Initialize master compression control. /// </summary> private void jinit_c_master_control(bool transcode_only) { /* Validate parameters, determine derived values */ initial_setup(transcode_only); if (m_scan_info != null) { validate_script(); if (block_size < JpegConstants.DCTSIZE) reduce_script(); } else { m_progressive_mode = false; m_num_scans = 1; } if (m_optimize_coding) { arith_code = false; /* disable arithmetic coding */ } else if (!arith_code && (m_progressive_mode || (block_size > 1 && block_size < JpegConstants.DCTSIZE))) { /* TEMPORARY HACK ??? */ /* assume default tables no good for progressive or reduced AC mode */ m_optimize_coding = true; /* force Huffman optimization */ } m_master = new jpeg_comp_master(this, transcode_only); }