1 /* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.camera; 18 19 import com.android.camera.debug.Log; 20 import com.android.camera.exif.ExifInterface; 21 22 import java.io.IOException; 23 24 public class Exif { 25 private static final Log.Tag TAG = new Log.Tag("CameraExif"); 26 27 public static ExifInterface getExif(byte[] jpegData) { 28 ExifInterface exif = new ExifInterface(); 29 try { 30 exif.readExif(jpegData); 31 } catch (IOException e) { 32 Log.w(TAG, "Failed to read EXIF data", e); 33 } 34 return exif; 35 } 36 37 // Returns the degrees in clockwise. Values are 0, 90, 180, or 270. 38 public static int getOrientation(ExifInterface exif) { 39 Integer val = exif.getTagIntValue(ExifInterface.TAG_ORIENTATION); 40 if (val == null) { 41 return 0; 42 } else { 43 return ExifInterface.getRotationForOrientationValue(val.shortValue()); 44 } 45 } 46 47 public static int getOrientation(byte[] jpegData) { 48 if (jpegData == null) return 0; 49 50 ExifInterface exif = getExif(jpegData); 51 return getOrientation(exif); 52 } 53 } 54
