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      1 /*
      2  * Copyright (C) 2014 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.one.v2.photo;
     18 
     19 import com.google.common.base.Supplier;
     20 
     21 import android.annotation.TargetApi;
     22 import android.os.Build;
     23 
     24 import com.android.camera.app.OrientationManager;
     25 import com.android.camera.debug.Log;
     26 import com.android.camera.one.OneCamera;
     27 import com.android.camera.one.OneCameraCharacteristics;
     28 import com.android.camera.util.CameraUtil;
     29 
     30 /**
     31  * Default implementation of ImageRotationCalculator which takes the camera's
     32  * sensor rotation and front/back-facing property to calculate image rotations.
     33  */
     34 @TargetApi(Build.VERSION_CODES.LOLLIPOP)
     35 public class ImageRotationCalculatorImpl implements ImageRotationCalculator {
     36 
     37     private final int mSensorOrientationDegrees;
     38     private final boolean mFrontFacing;
     39     private final OrientationManager mOrientationManager;
     40 
     41     /**
     42      * Create a calculator with the given hardware properties of the camera.
     43      *
     44      * @param sensorOrientationDegrees the orientation of the sensor, in
     45      *            degrees.
     46      * @param frontFacing whether the camera is front-facing.
     47      */
     48     public ImageRotationCalculatorImpl(OrientationManager orientationManager,
     49             int sensorOrientationDegrees, boolean frontFacing) {
     50         mSensorOrientationDegrees = sensorOrientationDegrees;
     51         mFrontFacing = frontFacing;
     52         mOrientationManager = orientationManager;
     53     }
     54 
     55     /**
     56      * Create a calculator based on Camera characteristics.
     57      */
     58     public static ImageRotationCalculator from(OrientationManager orientationManager,
     59             OneCameraCharacteristics characteristics) {
     60         int sensorOrientation = characteristics.getSensorOrientation();
     61         OneCamera.Facing lensDirection = characteristics.getCameraDirection();
     62         return new ImageRotationCalculatorImpl(orientationManager, sensorOrientation,
     63                 lensDirection == OneCamera.Facing.FRONT);
     64     }
     65 
     66     @Override
     67     public OrientationManager.DeviceOrientation toImageRotation() {
     68         int imageRotation = CameraUtil.getImageRotation(mSensorOrientationDegrees,
     69                 mOrientationManager.getDeviceOrientation().getDegrees(), mFrontFacing);
     70         return OrientationManager.DeviceOrientation.from(imageRotation);
     71     }
     72 
     73     @Override
     74     public Supplier<Integer> getSupplier() {
     75         return new Supplier<Integer>() {
     76             @Override
     77             public Integer get() {
     78                 return Integer.valueOf(toImageRotation().getDegrees());
     79             }
     80         };
     81     }
     82 }
     83