projects/dwt-win: dwt/internal/image/JPEGHuffmanTable.d annotate

annotate dwt/internal/image/JPEGHuffmanTable.d @ 213:36f5cb12e1a2

Update to SWT 3.4M7

author	Frank Benoit <benoit@tionex.de>
date	Sat, 17 May 2008 17:34:28 +0200
parents	9a64a7781bab
children

rev	line source
213 36f5cb12e1a2 Update to SWT 3.4M7 Frank Benoit <benoit@tionex.de> parents: 48 diff changeset	1 /*******************************************************************************
2 57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	2 * Copyright (c) 2000, 2005 IBM Corporation and others.
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	3 * All rights reserved. This program and the accompanying materials
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	4 * are made available under the terms of the Eclipse Public License v1.0
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	5 * which accompanies this distribution, and is available at
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	6 * http://www.eclipse.org/legal/epl-v10.html
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	7 *
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	8 * Contributors:
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	9 * IBM Corporation - initial API and implementation
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	10 * Port to the D programming language:
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	11 * Frank Benoit <benoit@tionex.de>
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	12 *******************************************************************************/
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	13 module dwt.internal.image.JPEGHuffmanTable;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	14
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	15 import dwt.internal.image.JPEGVariableSizeSegment;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	16 import dwt.internal.image.LEDataInputStream;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	17 import dwt.internal.image.JPEGFileFormat;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	18
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	19 import dwt.dwthelper.System;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	20 /**
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	21 * JPEGHuffmanTable class actually represents two types of object:
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	22 * 1) A DHT (Define Huffman Tables) segment, which may represent
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	23 * as many as 4 Huffman tables. In this case, the tables are
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	24 * stored in the allTables array.
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	25 * 2) A single Huffman table. In this case, the allTables array
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	26 * will be null.
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	27 * The 'reference' field is stored in both types of object, but
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	28 * 'initialize' is only called if the object represents a DHT.
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	29 */
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	30 final class JPEGHuffmanTable : JPEGVariableSizeSegment {
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	31 JPEGHuffmanTable[] allTables;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	32 int tableClass;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	33 int tableIdentifier;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	34 int[] dhMaxCodes;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	35 int[] dhMinCodes;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	36 int[] dhValPtrs;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	37 int[] dhValues;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	38 int[] ehCodes;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	39 byte[] ehCodeLengths;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	40 static byte[] DCLuminanceTable = [
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	41 cast(byte)255, cast(byte)196, 0, 31, 0, 0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0,
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	42 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	43 ];
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	44 static byte[] DCChrominanceTable = [
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	45 cast(byte)255, cast(byte)196, 0, 31, 1, 0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0,
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	46 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	47 ];
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	48 static byte[] ACLuminanceTable = [
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	49 cast(byte)255, cast(byte)196, 0, cast(byte)181, 16, 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 125,
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	50 1, 2, 3, 0, 4, 17, 5, 18, 33, 49, 65, 6, 19, 81, 97, 7, 34, 113, 20,
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	51 50, cast(byte)129, cast(byte)145, cast(byte)161, 8, 35, 66, cast(byte)177, cast(byte)193, 21, 82, cast(byte)209, cast(byte)240, 36, 51, 98,
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	52 114, cast(byte)130, 9, 10, 22, 23, 24, 25, 26, 37, 38, 39, 40, 41, 42, 52, 53,
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	53 54, 55, 56, 57, 58, 67, 68, 69, 70, 71, 72, 73, 74, 83, 84, 85, 86, 87,
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	54 88, 89, 90, 99, 100, 101, 102, 103, 104, 105, 106, 115, 116, 117, 118,
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	55 119, 120, 121, 122, cast(byte)131, cast(byte)132, cast(byte)133, cast(byte)134, cast(byte)135, cast(byte)136, cast(byte)137, cast(byte)138, cast(byte)146, cast(byte)147, cast(byte)148,
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	56 cast(byte)149, cast(byte)150, cast(byte)151, cast(byte)152, cast(byte)153, cast(byte)154, cast(byte)162, cast(byte)163, cast(byte)164, cast(byte)165, cast(byte)166, cast(byte)167, cast(byte)168, cast(byte)169, cast(byte)170,
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	57 cast(byte)178, cast(byte)179, cast(byte)180, cast(byte)181, cast(byte)182, cast(byte)183, cast(byte)184, cast(byte)185, cast(byte)186, cast(byte)194, cast(byte)195, cast(byte)196, cast(byte)197, cast(byte)198, cast(byte)199,
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	58 cast(byte)200, cast(byte)201, cast(byte)202, cast(byte)210, cast(byte)211, cast(byte)212, cast(byte)213, cast(byte)214, cast(byte)215, cast(byte)216, cast(byte)217, cast(byte)218, cast(byte)225, cast(byte)226, cast(byte)227,
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	59 cast(byte)228, cast(byte)229, cast(byte)230, cast(byte)231, cast(byte)232, cast(byte)233, cast(byte)234, cast(byte)241, cast(byte)242, cast(byte)243, cast(byte)244, cast(byte)245, cast(byte)246, cast(byte)247, cast(byte)248,
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	60 cast(byte)249, cast(byte)250
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	61 ];
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	62 static byte[] ACChrominanceTable = [
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	63 cast(byte)255, cast(byte)196, 0, cast(byte)181, 17, 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0,
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	64 1, 2, 119, 0, 1, 2, 3, 17, 4, 5, 33, 49, 6, 18, 65, 81, 7, 97, 113, 19, 34,
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	65 50, cast(byte)129, 8, 20, 66, cast(byte)145, cast(byte)161, cast(byte)177, cast(byte)193, 9, 35,
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	66 51, 82, cast(byte)240, 21, 98, 114, cast(byte)209, 10, 22, 36, 52, cast(byte)225, 37,
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	67 cast(byte)241, 23, 24, 25, 26, 38, 39, 40, 41, 42, 53, 54, 55, 56, 57, 58, 67,
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	68 68, 69, 70, 71, 72, 73, 74, 83, 84, 85, 86, 87, 88, 89, 90, 99, 100, 101, 102,
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	69 103, 104, 105, 106, 115, 116, 117, 118, 119, 120, 121, 122, cast(byte)130,
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	70 cast(byte)131, cast(byte)132, cast(byte)133, cast(byte)134, cast(byte)135, cast(byte)136, cast(byte)137,
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	71 cast(byte)138, cast(byte)146, cast(byte)147, cast(byte)148, cast(byte)149, cast(byte)150, cast(byte)151,
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	72 cast(byte)152, cast(byte)153, cast(byte)154, cast(byte)162, cast(byte)163, cast(byte)164, cast(byte)165,
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	73 cast(byte)166, cast(byte)167, cast(byte)168, cast(byte)169, cast(byte)170, cast(byte)178, cast(byte)179,
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	74 cast(byte)180, cast(byte)181, cast(byte)182, cast(byte)183, cast(byte)184, cast(byte)185, cast(byte)186,
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	75 cast(byte)194, cast(byte)195, cast(byte)196, cast(byte)197, cast(byte)198, cast(byte)199, cast(byte)200,
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	76 cast(byte)201, cast(byte)202, cast(byte)210, cast(byte)211, cast(byte)212, cast(byte)213, cast(byte)214,
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	77 cast(byte)215, cast(byte)216, cast(byte)217, cast(byte)218, cast(byte)226, cast(byte)227, cast(byte)228,
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	78 cast(byte)229, cast(byte)230, cast(byte)231, cast(byte)232, cast(byte)233, cast(byte)234, cast(byte)242,
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	79 cast(byte)243, cast(byte)244, cast(byte)245, cast(byte)246, cast(byte)247, cast(byte)248, cast(byte)249,
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	80 cast(byte)250
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	81 ];
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	82
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	83 public this(byte[] reference) {
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	84 super(reference);
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	85 }
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	86
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	87 public this(LEDataInputStream byteStream) {
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	88 super(byteStream);
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	89 initialize();
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	90 }
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	91
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	92 public JPEGHuffmanTable[] getAllTables() {
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	93 return allTables;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	94 }
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	95
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	96 public static JPEGHuffmanTable getDefaultACChrominanceTable() {
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	97 JPEGHuffmanTable result = new JPEGHuffmanTable(ACChrominanceTable);
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	98 result.initialize();
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	99 return result;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	100 }
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	101
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	102 public static JPEGHuffmanTable getDefaultACLuminanceTable() {
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	103 JPEGHuffmanTable result = new JPEGHuffmanTable(ACLuminanceTable);
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	104 result.initialize();
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	105 return result;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	106 }
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	107
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	108 public static JPEGHuffmanTable getDefaultDCChrominanceTable() {
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	109 JPEGHuffmanTable result = new JPEGHuffmanTable(DCChrominanceTable);
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	110 result.initialize();
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	111 return result;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	112 }
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	113
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	114 public static JPEGHuffmanTable getDefaultDCLuminanceTable() {
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	115 JPEGHuffmanTable result = new JPEGHuffmanTable(DCLuminanceTable);
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	116 result.initialize();
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	117 return result;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	118 }
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	119
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	120 public int[] getDhMaxCodes() {
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	121 return dhMaxCodes;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	122 }
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	123
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	124 public int[] getDhMinCodes() {
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	125 return dhMinCodes;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	126 }
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	127
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	128 public int[] getDhValPtrs() {
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	129 return dhValPtrs;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	130 }
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	131
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	132 public int[] getDhValues() {
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	133 return dhValues;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	134 }
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	135
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	136 public int getTableClass() {
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	137 return tableClass;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	138 }
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	139
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	140 public int getTableIdentifier() {
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	141 return tableIdentifier;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	142 }
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	143
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	144 void initialize() {
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	145 int totalLength = getSegmentLength() - 2;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	146 int ofs = 4;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	147 int[] bits = new int[16];
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	148 JPEGHuffmanTable[] huffTables = new JPEGHuffmanTable[8]; // maximum is 4 AC + 4 DC
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	149 int huffTableCount = 0;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	150 while (totalLength > 0) {
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	151 int tc = (reference[ofs] & 0xFF) >> 4; // table class: AC (1) or DC (0)
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	152 int tid = reference[ofs] & 0xF; // table id: 0-1 baseline, 0-3 prog/ext
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	153 ofs++;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	154
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	155 /* Read the 16 count bytes and add them together to get the table size. */
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	156 int count = 0;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	157 for (int i = 0; i < bits.length; i++) {
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	158 int bCount = reference[ofs + i] & 0xFF;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	159 bits[i] = bCount;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	160 count += bCount;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	161 }
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	162 ofs += 16;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	163 totalLength -= 17;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	164
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	165 /* Read the table. */
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	166 int[] huffVals = new int[count];
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	167 for (int i = 0; i < count; i++) {
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	168 huffVals[i] = reference[ofs + i] & 0xFF;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	169 }
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	170 ofs += count;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	171 totalLength -= count;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	172
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	173 /* Calculate the lengths. */
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	174 int[] huffCodeLengths = new int[50]; // start with 50 and increment as needed
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	175 int huffCodeLengthsIndex = 0;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	176 for (int i = 0; i < 16; i++) {
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	177 for (int j = 0; j < bits[i]; j++) {
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	178 if (huffCodeLengthsIndex >= huffCodeLengths.length) {
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	179 int[] newHuffCodeLengths = new int[huffCodeLengths.length + 50];
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	180 System.arraycopy(huffCodeLengths, 0, newHuffCodeLengths, 0, huffCodeLengths.length);
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	181 huffCodeLengths = newHuffCodeLengths;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	182 }
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	183 huffCodeLengths[huffCodeLengthsIndex] = i + 1;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	184 huffCodeLengthsIndex++;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	185 }
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	186 }
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	187
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	188 /* Truncate huffCodeLengths to the correct size. */
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	189 if (huffCodeLengthsIndex < huffCodeLengths.length) {
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	190 int[] newHuffCodeLengths = new int[huffCodeLengthsIndex];
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	191 System.arraycopy(huffCodeLengths, 0, newHuffCodeLengths, 0, huffCodeLengthsIndex);
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	192 huffCodeLengths = newHuffCodeLengths;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	193 }
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	194
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	195 /* Calculate the Huffman codes. */
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	196 int[] huffCodes = new int[50]; // start with 50 and increment as needed
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	197 int huffCodesIndex = 0;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	198 int k = 1;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	199 int code = 0;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	200 int si = huffCodeLengths[0];
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	201 int p = 0;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	202 while (p < huffCodeLengthsIndex) {
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	203 while ((p < huffCodeLengthsIndex) && (huffCodeLengths[p] is si)) {
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	204 if (huffCodesIndex >= huffCodes.length) {
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	205 int[] newHuffCodes = new int[huffCodes.length + 50];
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	206 System.arraycopy(huffCodes, 0, newHuffCodes, 0, huffCodes.length);
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	207 huffCodes = newHuffCodes;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	208 }
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	209 huffCodes[huffCodesIndex] = code;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	210 huffCodesIndex++;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	211 code++;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	212 p++;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	213 }
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	214 code *= 2;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	215 si++;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	216 }
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	217
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	218 /* Truncate huffCodes to the correct size. */
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	219 if (huffCodesIndex < huffCodes.length) {
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	220 int[] newHuffCodes = new int[huffCodesIndex];
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	221 System.arraycopy(huffCodes, 0, newHuffCodes, 0, huffCodesIndex);
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	222 huffCodes = newHuffCodes;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	223 }
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	224
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	225 /* Calculate the maximum and minimum codes */
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	226 k = 0;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	227 int[] maxCodes = new int[16];
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	228 int[] minCodes = new int[16];
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	229 int[] valPtrs = new int[16];
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	230 for (int i = 0; i < 16; i++) {
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	231 int bSize = bits[i];
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	232 if (bSize is 0) {
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	233 maxCodes[i] = -1;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	234 } else {
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	235 valPtrs[i] = k;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	236 minCodes[i] = huffCodes[k];
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	237 k += bSize;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	238 maxCodes[i] = huffCodes[k - 1];
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	239 }
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	240 }
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	241
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	242 /* Calculate the eHuffman codes and lengths. */
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	243 int[] eHuffCodes = new int[256];
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	244 byte[] eHuffSize = new byte[256];
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	245 for (int i = 0; i < huffCodesIndex; i++) {
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	246 eHuffCodes[huffVals[i]] = huffCodes[i];
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	247 eHuffSize[huffVals[i]] = cast(byte)huffCodeLengths[i];
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	248 }
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	249
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	250 /* Create the new JPEGHuffmanTable and add it to the allTables array. */
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	251 JPEGHuffmanTable dhtTable = new JPEGHuffmanTable(reference);
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	252 dhtTable.tableClass = tc;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	253 dhtTable.tableIdentifier = tid;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	254 dhtTable.dhValues = huffVals;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	255 dhtTable.dhMinCodes = minCodes;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	256 dhtTable.dhMaxCodes = maxCodes;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	257 dhtTable.dhValPtrs = valPtrs;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	258 dhtTable.ehCodes = eHuffCodes;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	259 dhtTable.ehCodeLengths = eHuffSize;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	260 huffTables[huffTableCount] = dhtTable;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	261 huffTableCount++;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	262 }
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	263 allTables = new JPEGHuffmanTable[huffTableCount];
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	264 System.arraycopy(huffTables, 0, allTables, 0, huffTableCount);
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	265 }
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	266
213 36f5cb12e1a2 Update to SWT 3.4M7 Frank Benoit <benoit@tionex.de> parents: 48 diff changeset	267 public override int signature() {
2 57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	268 return JPEGFileFormat.DHT;
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	269 }
57151e2793a2 More common modules from dwt-linux Frank Benoit <benoit@tionex.de> parents: diff changeset	270 }

Mercurial > projects > dwt-win

annotate dwt/internal/image/JPEGHuffmanTable.d @ 213:36f5cb12e1a2