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
17package com.android.camera;
18
19import android.util.Log;
20
21import com.android.gallery3d.exif.ExifInterface;
22
23import java.io.IOException;
24
25public class Exif {
26    private static final String TAG = "CameraExif";
27
28    public static ExifInterface getExif(byte[] jpegData) {
29        ExifInterface exif = new ExifInterface();
30        try {
31            exif.readExif(jpegData);
32        } catch (IOException e) {
33            Log.w(TAG, "Failed to read EXIF data", e);
34        }
35        return exif;
36    }
37
38    // Returns the degrees in clockwise. Values are 0, 90, 180, or 270.
39    public static int getOrientation(ExifInterface exif) {
40        Integer val = exif.getTagIntValue(ExifInterface.TAG_ORIENTATION);
41        if (val == null) {
42            return 0;
43        } else {
44            return ExifInterface.getRotationForOrientationValue(val.shortValue());
45        }
46    }
47
48    public static int getOrientation(byte[] jpegData) {
49        if (jpegData == null) return 0;
50
51        ExifInterface exif = getExif(jpegData);
52        return getOrientation(exif);
53    }
54}
55