Java修改图片元数据Exif信息

/* MediaUtil LLJTran - $RCSfile: LLJTran.java,v $ * Copyright (C) 1999-2005 Dmitriy Rogatkin, Suresh Mahalingam. All rights reserved. * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * $Id: LLJTran.java,v 1.6 2006/05/13 07:24:01 msuresh Exp $ * * Some ideas and algorithms were borrowed from: * Thomas G. Lane, and James R. Weeks * */ package mediautil.image.jpeg; import mediautil.gen.BasicIo; import mediautil.gen.FileFormatException; import mediautil.gen.Log; import mediautil.gen.ProgressCallback; import mediautil.gen.directio.IterativeReader; import mediautil.gen.directio.IterativeWriter; import java.awt.*; import java.io.*; class IterativeReadVars { public static final int READING_STAGE = 1; public static final int READING_DCT_STAGE = 2; public static final int READING_APPX_STAGE = 3; public static final int IMAGE_READ_STAGE = 4; public static final int DONE_STAGE = 5; // For info public int minReadRequest; public int maxReadRequest; public InputStream is; public int readUpto; public int stage; public int sections; public boolean keep_appxs, appxsCleared; public int appxPos, appxLen; public boolean throwException; //Vars for readDCT public double currentProgress, callbackProgress, progressPerMcu; public int []last_dc; public int [][]DCT; public int next_restart_num; public int ix, iy; } class IterativeWriteVars { public static final int WRITE_BEGIN = 0; public static final int WRITE_COMMENTS = 1; public static final int WRITE_APPXS = 2; public static final int WRITE_DQT = 3; public static final int WRITE_DHT = 4; public static final int WRITE_START = 5; public static final int WRITE_DCT = 6; public static final int WRITE_COMPLETE = 7; // For info public int minWriteRequest; public int maxWriteRequest; public OutputStream os; public int op; public int options; public int restart_interval; public String comment; public Class custom_appx; public int state = WRITE_COMPLETE; public byte huffTables[]; public int currentAppxPos, currentAppx; public byte saveAppxs[]; public int svX; public int svY; public int svWidthMCU; public int svHeightMCU; // initWriteDCT vars public boolean transformDct; public int [][][][][] new_dct_coefs; public double currentProgress, callbackProgress, progressPerMcu; public int []last_dc; public int restarts_to_go; public int xCropOffsetMCU; public int yCropOffsetMCU; public boolean handleXEdge; public boolean handleYEdge; public int new_ix, new_iy; public boolean pullDownMode; // For unused method writeJpeg public boolean restoreVars; // if transformDct true it indicates if full Dct array needs to be allocated // or if the rows of old dct array can be reused. public boolean reuseDctRows = true; public void freeMemory() { huffTables = null; new_dct_coefs = null; last_dc = null; } } /** * LLJTran is a class for Lossless Jpeg Transformation.<p> * * With the help of Supporting classes like Exif it can also be used to change * Image Header Information (Exif header) like Date, Thumbnail, Orientation * etc.<p> * * Following are the key features:<p> * * <ul> * <li> Supports lossless rotation, transpose, transverse and crop * <li> Trimming or relocating Non Transformable edge blocks similiar to * <a target=_blank href="http://www.ijg.org">jpegtran</a> or processing them * like regular MCU blocks. Please see the documentation for the * {@link #OPT_XFORM_TRIM} and {@link #OPT_XFORM_ADJUST_EDGES} for more info * on this. * <li> Reading and Modifying Image Header Information (Exif) including * Thumbnail * <li> Built-in transformation of Thumbnail and Orientation marker * <li> Supports directio Interfaces {@link IterativeReader} and {@link IterativeWriter} * enabling things like Sharing the jpeg input file with say jkd's * ImageReader while reading * <li>Does <b>not</b> Support Multi-Threading for the same Object to be * used simultaneously by more than one thread. However different threads * can have their own LLJTran Objects. * </ul> * * @author Dmitriy Rogatkin &amp; Suresh Mahalingam (msuresh@cheerful.com) */ public class LLJTran extends BasicJpegIo implements IterativeReader, IterativeWriter { /** Name of the JFIF format */ public static final String JFIF = "JFIF"; /** Name of the FPXR format */ public static final String FPXR = "FPXR"; /** Name of the JPEG format */ public static final String JPEG = "JPEG"; // TODO: move rotation constants to some interface /** Identifies the identity transformation or no transformation */ public static final int NONE = 0; /** Identifies the Horizontal Flip transformation */ public static final int FLIP_H = 1; /** Identifies the Vertical Flip transformation */ public static final int FLIP_V = 2; /** Identifies the Transpose transformation */ public static final int TRANSPOSE = 3; /** Identifies the Transverse transformation */ public static final int TRANSVERSE = 4; /** Identifies the Rotate 90 degrees clockwise transformation */ public static final int ROT_90 = 5; /** Identifies the Rotate 180 degrees transformation */ public static final int ROT_180 = 6; /** Identifies the Rotate 270 degrees clockwise transformation */ public static final int ROT_270 = 7; /** Identifies the crop transformation */ public static final int CROP = 8; /** Identifies the comment transformation. * This is not used in LLJTran as of now */ public static final int COMMENT = 9; protected static final int DCTSIZE2 = 64; protected static final int DCTSIZE = 8; protected static final int BYTE_SIZE = 8; private static final int HUFF_LOOKAHEAD = 8; /** Identifies that no part of the Image has been read successfully. Not a * valid option while reading */ public static final int READ_NONE = 0; /** Identifies the option to read upto the Image Header Info while reading */ public static final int READ_INFO = 1; /** Identifies the option to read upto the Image Header including image * dimensions, parameters and tables for decoding while reading */ public static final int READ_HEADER = 2; /** Identifies the option to read the entire image while reading */ public static final int READ_ALL = 3; /** Flag to specifiy that the Image Header information (Exif width, height * and resolution) should be adjusted when transforming the ima