001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.commons.imaging.formats.jpeg;
018
019import java.util.Arrays;
020import java.util.Collections;
021import java.util.List;
022
023import org.apache.commons.imaging.common.BinaryConstant;
024import org.apache.commons.imaging.common.BinaryFunctions;
025
026public final class JpegConstants {
027    public static final int MAX_SEGMENT_SIZE = 0xffff;
028
029    public static final BinaryConstant JFIF0_SIGNATURE = new BinaryConstant(new byte[] { 0x4a, // J
030            0x46, // F
031            0x49, // I
032            0x46, // F
033            0x0, //
034    });
035    public static final BinaryConstant JFIF0_SIGNATURE_ALTERNATIVE = new BinaryConstant(new byte[] { 0x4a, // J
036            0x46, // F
037            0x49, // I
038            0x46, // F
039            0x20, //
040    });
041
042    public static final BinaryConstant EXIF_IDENTIFIER_CODE = new BinaryConstant(new byte[] { 0x45, // E
043            0x78, // x
044            0x69, // i
045            0x66, // f
046    });
047
048    public static final BinaryConstant XMP_IDENTIFIER = new BinaryConstant(new byte[] { 0x68, // h
049            0x74, // t
050            0x74, // t
051            0x70, // p
052            0x3A, // :
053            0x2F, // /
054            0x2F, // /
055            0x6E, // n
056            0x73, // s
057            0x2E, // .
058            0x61, // a
059            0x64, // d
060            0x6F, // o
061            0x62, // b
062            0x65, // e
063            0x2E, // .
064            0x63, // c
065            0x6F, // o
066            0x6D, // m
067            0x2F, // /
068            0x78, // x
069            0x61, // a
070            0x70, // p
071            0x2F, // /
072            0x31, // 1
073            0x2E, // .
074            0x30, // 0
075            0x2F, // /
076            0, // 0-terminated us-ascii string.
077    });
078
079    public static final BinaryConstant SOI = new BinaryConstant(new byte[] { (byte) 0xff, (byte) 0xd8 });
080    public static final BinaryConstant EOI = new BinaryConstant(new byte[] { (byte) 0xff, (byte) 0xd9 });
081
082    public static final int JPEG_APP0 = 0xE0;
083    public static final int JPEG_APP0_MARKER = 0xff00 | JPEG_APP0;
084    public static final int JPEG_APP1_MARKER = 0xff00 | JPEG_APP0 + 1;
085    public static final int JPEG_APP2_MARKER = 0xff00 | JPEG_APP0 + 2;
086    public static final int JPEG_APP13_MARKER = 0xff00 | JPEG_APP0 + 13;
087    public static final int JPEG_APP14_MARKER = 0xff00 | JPEG_APP0 + 14;
088    public static final int JPEG_APP15_MARKER = 0xff00 | JPEG_APP0 + 15;
089
090    public static final int JFIF_MARKER = 0xFFE0;
091    public static final int SOF0_MARKER = 0xFFc0;
092    public static final int SOF1_MARKER = 0xFFc0 + 0x1;
093    public static final int SOF2_MARKER = 0xFFc0 + 0x2;
094    public static final int SOF3_MARKER = 0xFFc0 + 0x3;
095    public static final int DHT_MARKER = 0xFFc0 + 0x4;
096    public static final int SOF5_MARKER = 0xFFc0 + 0x5;
097    public static final int SOF6_MARKER = 0xFFc0 + 0x6;
098    public static final int SOF7_MARKER = 0xFFc0 + 0x7;
099    public static final int SOF8_MARKER = 0xFFc0 + 0x8;
100    public static final int SOF9_MARKER = 0xFFc0 + 0x9;
101    public static final int SOF10_MARKER = 0xFFc0 + 0xa;
102    public static final int SOF11_MARKER = 0xFFc0 + 0xb;
103    public static final int DAC_MARKER = 0xFFc0 + 0xc;
104    public static final int SOF13_MARKER = 0xFFc0 + 0xd;
105    public static final int SOF14_MARKER = 0xFFc0 + 0xe;
106    public static final int SOF15_MARKER = 0xFFc0 + 0xf;
107
108    // marker for restart intervals
109    public static final int DRI_MARKER = 0xFFdd;
110    public static final int RST0_MARKER = 0xFFd0;
111    public static final int RST1_MARKER = 0xFFd0 + 0x1;
112    public static final int RST2_MARKER = 0xFFd0 + 0x2;
113    public static final int RST3_MARKER = 0xFFd0 + 0x3;
114    public static final int RST4_MARKER = 0xFFd0 + 0x4;
115    public static final int RST5_MARKER = 0xFFd0 + 0x5;
116    public static final int RST6_MARKER = 0xFFd0 + 0x6;
117    public static final int RST7_MARKER = 0xFFd0 + 0x7;
118
119    public static final int EOI_MARKER = 0xFFd9;
120    public static final int SOS_MARKER = 0xFFda;
121    public static final int DQT_MARKER = 0xFFdb;
122    public static final int DNL_MARKER = 0xFFdc;
123    public static final int COM_MARKER = 0xFFfe;
124
125    public static final List<Integer> MARKERS = Collections.unmodifiableList(
126            Arrays.asList(JPEG_APP0, JPEG_APP0_MARKER, JPEG_APP1_MARKER, JPEG_APP2_MARKER, JPEG_APP13_MARKER, JPEG_APP14_MARKER, JPEG_APP15_MARKER, JFIF_MARKER,
127                    SOF0_MARKER, SOF1_MARKER, SOF2_MARKER, SOF3_MARKER, DHT_MARKER, SOF5_MARKER, SOF6_MARKER, SOF7_MARKER, SOF8_MARKER, SOF9_MARKER,
128                    SOF10_MARKER, SOF11_MARKER, DAC_MARKER, SOF13_MARKER, SOF14_MARKER, SOF15_MARKER, EOI_MARKER, SOS_MARKER, DQT_MARKER, DNL_MARKER,
129                    COM_MARKER, DRI_MARKER, RST0_MARKER, RST1_MARKER, RST2_MARKER, RST3_MARKER, RST4_MARKER, RST5_MARKER, RST6_MARKER, RST7_MARKER));
130
131    public static final BinaryConstant ICC_PROFILE_LABEL = new BinaryConstant(
132            new byte[] { 0x49, 0x43, 0x43, 0x5F, 0x50, 0x52, 0x4F, 0x46, 0x49, 0x4C, 0x45, 0x0 });
133
134    public static final BinaryConstant PHOTOSHOP_IDENTIFICATION_STRING = new BinaryConstant(new byte[] { 0x50, // P
135            0x68, // h
136            0x6F, // o
137            0x74, // t
138            0x6F, // o
139            0x73, // s
140            0x68, // h
141            0x6F, // o
142            0x70, // p
143            0x20, //
144            0x33, // 3
145            0x2E, // .
146            0x30, // 0
147            0, });
148    public static final int CONST_8BIM = BinaryFunctions.charsToQuad('8', 'B', 'I', 'M');
149
150    private JpegConstants() {
151    }
152}