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 com.android.camera.debug.Log;
20import com.android.camera.exif.ExifInterface;
21
22import java.io.IOException;
23
24public 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