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(
030            new byte[] { 0x4a, // J
031                    0x46, // F
032                    0x49, // I
033                    0x46, // F
034                    0x0, //
035            });
036    public static final BinaryConstant JFIF0_SIGNATURE_ALTERNATIVE = new BinaryConstant(
037            new byte[] { 0x4a, // J
038                    0x46, // F
039                    0x49, // I
040                    0x46, // F
041                    0x20, //
042            });
043
044    public static final BinaryConstant EXIF_IDENTIFIER_CODE = new BinaryConstant(
045            new byte[] { 0x45, // E
046                    0x78, // x
047                    0x69, // i
048                    0x66, // f
049            });
050
051    public static final BinaryConstant XMP_IDENTIFIER = new BinaryConstant(
052            new byte[] { 0x68, // h
053                    0x74, // t
054                    0x74, // t
055                    0x70, // p
056                    0x3A, // :
057                    0x2F, // /
058                    0x2F, // /
059                    0x6E, // n
060                    0x73, // s
061                    0x2E, // .
062                    0x61, // a
063                    0x64, // d
064                    0x6F, // o
065                    0x62, // b
066                    0x65, // e
067                    0x2E, // .
068                    0x63, // c
069                    0x6F, // o
070                    0x6D, // m
071                    0x2F, // /
072                    0x78, // x
073                    0x61, // a
074                    0x70, // p
075                    0x2F, // /
076                    0x31, // 1
077                    0x2E, // .
078                    0x30, // 0
079                    0x2F, // /
080                    0, // 0-terminated us-ascii string.
081            });
082
083    public static final BinaryConstant SOI = new BinaryConstant(new byte[] {
084            (byte) 0xff, (byte) 0xd8 });
085    public static final BinaryConstant EOI = new BinaryConstant(new byte[] {
086            (byte) 0xff, (byte) 0xd9 });
087
088    public static final int JPEG_APP0 = 0xE0;
089    public static final int JPEG_APP0_MARKER = (0xff00) | (JPEG_APP0);
090    public static final int JPEG_APP1_MARKER = (0xff00) | (JPEG_APP0 + 1);
091    public static final int JPEG_APP2_MARKER = (0xff00) | (JPEG_APP0 + 2);
092    public static final int JPEG_APP13_MARKER = (0xff00) | (JPEG_APP0 + 13);
093    public static final int JPEG_APP14_MARKER = (0xff00) | (JPEG_APP0 + 14);
094    public static final int JPEG_APP15_MARKER = (0xff00) | (JPEG_APP0 + 15);
095
096    public static final int JFIF_MARKER = 0xFFE0;
097    public static final int SOF0_MARKER = 0xFFc0;
098    public static final int SOF1_MARKER = 0xFFc0 + 0x1;
099    public static final int SOF2_MARKER = 0xFFc0 + 0x2;
100    public static final int SOF3_MARKER = 0xFFc0 + 0x3;
101    public static final int DHT_MARKER = 0xFFc0 + 0x4;
102    public static final int SOF5_MARKER = 0xFFc0 + 0x5;
103    public static final int SOF6_MARKER = 0xFFc0 + 0x6;
104    public static final int SOF7_MARKER = 0xFFc0 + 0x7;
105    public static final int SOF8_MARKER = 0xFFc0 + 0x8;
106    public static final int SOF9_MARKER = 0xFFc0 + 0x9;
107    public static final int SOF10_MARKER = 0xFFc0 + 0xa;
108    public static final int SOF11_MARKER = 0xFFc0 + 0xb;
109    public static final int DAC_MARKER = 0xFFc0 + 0xc;
110    public static final int SOF13_MARKER = 0xFFc0 + 0xd;
111    public static final int SOF14_MARKER = 0xFFc0 + 0xe;
112    public static final int SOF15_MARKER = 0xFFc0 + 0xf;
113
114    // marker for restart intervals
115    public static final int DRI_MARKER = 0xFFdd;
116    public static final int RST0_MARKER = 0xFFd0;
117    public static final int RST1_MARKER = 0xFFd0 + 0x1;
118    public static final int RST2_MARKER = 0xFFd0 + 0x2;
119    public static final int RST3_MARKER = 0xFFd0 + 0x3;
120    public static final int RST4_MARKER = 0xFFd0 + 0x4;
121    public static final int RST5_MARKER = 0xFFd0 + 0x5;
122    public static final int RST6_MARKER = 0xFFd0 + 0x6;
123    public static final int RST7_MARKER = 0xFFd0 + 0x7;
124
125    public static final int EOI_MARKER = 0xFFd9;
126    public static final int SOS_MARKER = 0xFFda;
127    public static final int DQT_MARKER = 0xFFdb;
128    public static final int DNL_MARKER = 0xFFdc;
129    public static final int COM_MARKER = 0xFFfe;
130
131    public static final List<Integer> MARKERS = Collections.unmodifiableList(Arrays.asList(
132            JPEG_APP0, JPEG_APP0_MARKER,
133            JPEG_APP1_MARKER, JPEG_APP2_MARKER, JPEG_APP13_MARKER,
134            JPEG_APP14_MARKER, JPEG_APP15_MARKER, JFIF_MARKER,
135            SOF0_MARKER, SOF1_MARKER, SOF2_MARKER, SOF3_MARKER, DHT_MARKER,
136            SOF5_MARKER, SOF6_MARKER, SOF7_MARKER, SOF8_MARKER, SOF9_MARKER,
137            SOF10_MARKER, SOF11_MARKER, DAC_MARKER, SOF13_MARKER,
138            SOF14_MARKER, SOF15_MARKER, EOI_MARKER, SOS_MARKER, DQT_MARKER,
139            DNL_MARKER, COM_MARKER, DRI_MARKER, RST0_MARKER, RST1_MARKER, RST2_MARKER,
140            RST3_MARKER, RST4_MARKER, RST5_MARKER, RST6_MARKER, RST7_MARKER ));
141
142    public static final BinaryConstant ICC_PROFILE_LABEL = new BinaryConstant(
143            new byte[] { 0x49, 0x43, 0x43, 0x5F, 0x50, 0x52, 0x4F, 0x46, 0x49,
144                    0x4C, 0x45, 0x0 });
145
146    public static final BinaryConstant PHOTOSHOP_IDENTIFICATION_STRING = new BinaryConstant(
147            new byte[] { 0x50, // P
148                    0x68, // h
149                    0x6F, // o
150                    0x74, // t
151                    0x6F, // o
152                    0x73, // s
153                    0x68, // h
154                    0x6F, // o
155                    0x70, // p
156                    0x20, //
157                    0x33, // 3
158                    0x2E, // .
159                    0x30, // 0
160                    0, });
161    public static final int CONST_8BIM = BinaryFunctions.charsToQuad('8', 'B', 'I', 'M');
162
163    private JpegConstants() {
164    }
165}