Android Open Source - SimpleReflectedLightMeter Exif Thumbnail

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Back to project page SimpleReflectedLightMeter.

License

The source code is released under:

MIT License

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Java Source Code

/*
 * ExifThumbnail.java//w w  w  . java  2s .  c o  m
 *
 *  (c) 2013 mugcupsoup@gmail.com
 *
 *  Licensed under the MIT license.
 *  http://www.opensource.org/licenses/mit-license
 */
package com.gmail.mugucupsoup.android.Exif;

import java.io.*;
import java.util.*;

public class ExifThumbnail extends ExifInfomation {  
  private boolean thumbnail_compress = false;
  private int thumbnailtype = THUMB_JPEG;
  private int thumb_head;
  private int thumb_len;
  private byte[] imageBytes = null;
  
  public byte[] getImageBytes() {
    return imageBytes;
  }
  
  public int getThumbnailtype() {
    return thumbnailtype;
  }
  
  public void setTiffTags(HashMap<Integer, ExifTag> tiffTags) {
    this.tiffTags = tiffTags;
  }

  public void setExifTags(HashMap<Integer, ExifTag> exifTags) {
    this.exifTags = exifTags;
  }

  public void setGpsTags(HashMap<Integer, ExifTag> gpsTags) {
    this.gpsTags = gpsTags;
  }

  public void setTnTags(HashMap<Integer, ExifTag> tnTags) {
    this.tnTags = tnTags;
  }
  
  public ExifThumbnail(boolean thumbnail_compress, int thumbnailtype, int tnhead,int tnlen) {
    super();
    this.thumbnail_compress = thumbnail_compress;
    this.thumbnailtype = thumbnailtype;
    this.thumb_head = tnhead;
    this.thumb_len = tnlen;
  }

  public void setHedderTiff(int pos){
    HEADER_TIFF = pos;
  }

  private void writeHeader(ByteArrayOutputStream stream) {
    if (this.littleEndian) {
      stream.write(0x49);
      stream.write(0x49);
    } else {
      stream.write(0x4d);
      stream.write(0x4d);
    }

    writeDByte(stream,0x002a);
    writeDDByte(stream,0x00000008);

    return;
  }


  private void writeDDByte(ByteArrayOutputStream stream, int i) {
    int b1 = i / (0x100 * 0x100);
    int b2 = i - (b1 * 0x100 * 0x100);
    if (this.littleEndian) {
      writeDByte(stream, b2);
      writeDByte(stream, b1);
    } else {
      writeDByte(stream, b1);
      writeDByte(stream, b2);
    }
    return;
  }

  private void writeDByte(ByteArrayOutputStream stream, int i) {
    byte b1 = (byte) (i / 0x100);
    byte b2 = (byte) (i - (int) b1 * 0x100);
    if (this.littleEndian) {
      stream.write(b2);
      stream.write(b1);
    } else {
      stream.write(b1);
      stream.write(b2);
    }
    return;
  }

  public boolean writeImage(String filename) throws IOException {
    if(imageBytes != null){
      FileOutputStream fos = new FileOutputStream(filename);
      fos.write(imageBytes);
      fos.close();
      return true;
    }
    return false;
  }
  
  public byte[] readImage(ExByteArrayInputStream memstream) throws IOException {
    if(this.thumb_head > 0 && this.thumb_len > 0){
      ByteArrayOutputStream baos = new ByteArrayOutputStream();
      if (!thumbnail_compress) this.writeHeader(baos);
      memstream.seek(thumb_head);
      byte b;
      for (int i = 0; i < this.thumb_len; i++) {
        b = (byte) memstream.read();
        baos.write(b);        
      }
      imageBytes = baos.toByteArray();
      baos.close();
    }
    return imageBytes;
  }

}

Java Source Code List