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 
getExif(byte[] jpegData)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.
getOrientation(ExifInterface exif)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 
getOrientation(byte[] jpegData)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