private void OJPEGWriteStreamRst(out byte[] mem, out uint len) { Debug.Assert(OJPEG_BUFFER >= 2); m_out_buffer[0] = 255; m_out_buffer[1] = (byte)((byte)JpegMarkerType.RST0 + m_restart_index); m_restart_index++; if (m_restart_index == 8) m_restart_index = 0; len = 2; mem = m_out_buffer; m_out_state = OJPEGStateOutState.ososCompressed; }
private bool OJPEGWriteHeaderInfo() { Debug.Assert(!m_libjpeg_session_active); m_out_state = OJPEGStateOutState.ososSoi; m_restart_index = 0; if (!jpeg_create_decompress_encap()) return false; m_libjpeg_session_active = true; m_libjpeg_jpeg_source_mgr = new OJpegSrcManager(this); m_libjpeg_jpeg_decompress_struct.Src = m_libjpeg_jpeg_source_mgr; if (jpeg_read_header_encap(true) == ReadResult.Suspended) return false; if (!m_subsampling_force_desubsampling_inside_decompression && (m_samples_per_pixel_per_plane > 1)) { m_libjpeg_jpeg_decompress_struct.Raw_data_out = true; //#if JPEG_LIB_VERSION >= 70 // libjpeg_jpeg_decompress_struct.do_fancy_upsampling=FALSE; //#endif m_libjpeg_jpeg_query_style = 0; if (!m_subsampling_convert_log) { Debug.Assert(m_subsampling_convert_ybuf == null); Debug.Assert(m_subsampling_convert_cbbuf == null); Debug.Assert(m_subsampling_convert_crbuf == null); Debug.Assert(m_subsampling_convert_ycbcrimage == null); m_subsampling_convert_ylinelen = (uint)((m_strile_width + m_subsampling_hor * 8 - 1) / (m_subsampling_hor * 8) * m_subsampling_hor * 8); m_subsampling_convert_ylines = (uint)(m_subsampling_ver * 8); m_subsampling_convert_clinelen = m_subsampling_convert_ylinelen / m_subsampling_hor; m_subsampling_convert_clines = 8; m_subsampling_convert_ybuf = new byte[m_subsampling_convert_ylines][]; for (int i = 0; i < m_subsampling_convert_ylines; i++) m_subsampling_convert_ybuf[i] = new byte[m_subsampling_convert_ylinelen]; m_subsampling_convert_cbbuf = new byte[m_subsampling_convert_clines][]; m_subsampling_convert_crbuf = new byte[m_subsampling_convert_clines][]; for (int i = 0; i < m_subsampling_convert_clines; i++) { m_subsampling_convert_cbbuf[i] = new byte[m_subsampling_convert_clinelen]; m_subsampling_convert_crbuf[i] = new byte[m_subsampling_convert_clinelen]; } m_subsampling_convert_ycbcrimage = new byte[3][][]; m_subsampling_convert_ycbcrimage[0] = new byte[m_subsampling_convert_ylines][]; for (uint n = 0; n < m_subsampling_convert_ylines; n++) m_subsampling_convert_ycbcrimage[0][n] = m_subsampling_convert_ybuf[n]; m_subsampling_convert_ycbcrimage[1] = new byte[m_subsampling_convert_clines][]; for (uint n = 0; n < m_subsampling_convert_clines; n++) m_subsampling_convert_ycbcrimage[1][n] = m_subsampling_convert_cbbuf[n]; m_subsampling_convert_ycbcrimage[2] = new byte[m_subsampling_convert_clines][]; for (uint n = 0; n < m_subsampling_convert_clines; n++) m_subsampling_convert_ycbcrimage[2][n] = m_subsampling_convert_crbuf[n]; m_subsampling_convert_clinelenout = ((m_strile_width + m_subsampling_hor - 1) / m_subsampling_hor); m_subsampling_convert_state = 0; m_bytes_per_line = (uint)(m_subsampling_convert_clinelenout * (m_subsampling_ver * m_subsampling_hor + 2)); m_lines_per_strile = ((m_strile_length + m_subsampling_ver - 1) / m_subsampling_ver); m_subsampling_convert_log = true; } } else { m_libjpeg_jpeg_decompress_struct.Jpeg_color_space = ColorSpace.Unknown; m_libjpeg_jpeg_decompress_struct.Out_color_space = ColorSpace.Unknown; m_libjpeg_jpeg_query_style = 1; m_bytes_per_line = m_samples_per_pixel_per_plane * m_strile_width; m_lines_per_strile = m_strile_length; } if (!jpeg_start_decompress_encap()) return false; m_writeheader_done = true; return true; }
private bool OJPEGWriteStreamCompressed(out byte[] mem, out uint len) { mem = null; len = 0; if (m_in_buffer_togo == 0) { if (!OJPEGReadBufferFill()) return false; Debug.Assert(m_in_buffer_togo > 0); } len = m_in_buffer_togo; if (m_in_buffer_cur == 0) { mem = m_in_buffer; } else { mem = new byte[len]; Buffer.BlockCopy(m_in_buffer, m_in_buffer_cur, mem, 0, (int)len); } m_in_buffer_togo = 0; if (m_in_buffer_file_togo == 0) { switch (m_in_buffer_source) { case OJPEGStateInBufferSource.osibsStrile: if (m_in_buffer_next_strile < m_in_buffer_strile_count) m_out_state = OJPEGStateOutState.ososRst; else m_out_state = OJPEGStateOutState.ososEoi; break; case OJPEGStateInBufferSource.osibsEof: m_out_state = OJPEGStateOutState.ososEoi; break; default: break; } } return true; }
private void cleanState() { m_jpeg_interchange_format = 0; m_jpeg_interchange_format_length = 0; m_jpeg_proc = 0; m_subsamplingcorrect_done = false; m_subsampling_tag = false; m_subsampling_hor = 0; m_subsampling_ver = 0; m_qtable_offset_count = 0; m_dctable_offset_count = 0; m_actable_offset_count = 0; m_qtable_offset = new uint[3]; m_dctable_offset = new uint[3]; m_actable_offset = new uint[3]; m_restart_interval = 0; m_libjpeg_jpeg_decompress_struct = null; m_file_size = 0; m_image_width = 0; m_image_length = 0; m_strile_width = 0; m_strile_length = 0; m_strile_length_total = 0; m_samples_per_pixel = 0; m_plane_sample_offset = 0; m_samples_per_pixel_per_plane = 0; m_subsamplingcorrect = false; m_subsampling_force_desubsampling_inside_decompression = false; m_qtable = new byte[4][]; m_dctable = new byte[4][]; m_actable = new byte[4][]; m_restart_index = 0; m_sof_log = false; m_sof_marker_id = 0; m_sof_x = 0; m_sof_y = 0; m_sof_c = new byte[3]; m_sof_hv = new byte[3]; m_sof_tq = new byte[3]; m_sos_cs = new byte[3]; m_sos_tda = new byte[3]; m_sos_end = new SosEnd[3]; m_readheader_done = false; m_writeheader_done = false; m_write_cursample = 0; m_write_curstrile = 0; m_libjpeg_session_active = false; m_libjpeg_jpeg_query_style = 0; m_libjpeg_jpeg_error_mgr = null; m_libjpeg_jpeg_source_mgr = null; m_subsampling_convert_log = false; m_subsampling_convert_ylinelen = 0; m_subsampling_convert_ylines = 0; m_subsampling_convert_clinelen = 0; m_subsampling_convert_clines = 0; m_subsampling_convert_ybuf = null; m_subsampling_convert_cbbuf = null; m_subsampling_convert_crbuf = null; m_subsampling_convert_ycbcrimage = null; m_subsampling_convert_clinelenout = 0; m_subsampling_convert_state = 0; m_bytes_per_line = 0; m_lines_per_strile = 0; m_in_buffer_source = OJPEGStateInBufferSource.osibsNotSetYet; m_in_buffer_next_strile = 0; m_in_buffer_strile_count = 0; m_in_buffer_file_pos = 0; m_in_buffer_file_pos_log = false; m_in_buffer_file_togo = 0; m_in_buffer_togo = 0; m_in_buffer_cur = 0; // index into m_in_buffer m_in_buffer = new byte[OJPEG_BUFFER]; m_out_state = 0; m_out_buffer = new byte[OJPEG_BUFFER]; m_skip_buffer = null; m_forceProcessedRgbOutput = false; }