    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}