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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.initialization;
     18 
     19 import android.hardware.camera2.CaptureResult;
     20 
     21 import com.android.camera.async.Updatable;
     22 import com.android.camera.one.OneCamera;
     23 import com.android.camera.one.v2.camera2proxy.TotalCaptureResultProxy;
     24 
     25 import java.util.HashSet;
     26 import java.util.Set;
     27 
     28 import javax.annotation.Nonnull;
     29 
     30 /**
     31  * Distributes metadata to more-specific callbacks.
     32  */
     33 public class MetadataCallback implements Updatable<TotalCaptureResultProxy> {
     34     private final Updatable<Integer> mFocusState;
     35     private final Updatable<OneCamera.FocusState> mOneCameraFocusState;
     36     private final Updatable<Integer> mFocusMode;
     37 
     38     public MetadataCallback(
     39             Updatable<Integer> focusState,
     40             Updatable<OneCamera.FocusState> oneCameraFocusState,
     41             Updatable<Integer> focusMode) {
     42         mFocusState = focusState;
     43         mOneCameraFocusState = oneCameraFocusState;
     44         mFocusMode = focusMode;
     45     }
     46 
     47     @Override
     48     public void update(@Nonnull TotalCaptureResultProxy totalCaptureResult) {
     49         updateFocusMode(totalCaptureResult);
     50         updateFocusState(totalCaptureResult);
     51         updateOneCameraFocusState(totalCaptureResult);
     52     }
     53 
     54     private void updateFocusMode(TotalCaptureResultProxy totalCaptureResult) {
     55         Integer focusMode = totalCaptureResult.get(CaptureResult.CONTROL_AF_MODE);
     56         if (focusMode != null) {
     57             mFocusMode.update(focusMode);
     58         }
     59     }
     60 
     61     private void updateFocusState(TotalCaptureResultProxy totalCaptureResult) {
     62         Integer focusState = totalCaptureResult.get(CaptureResult.CONTROL_AF_STATE);
     63         if (focusState != null) {
     64             mFocusState.update(focusState);
     65         }
     66     }
     67 
     68     private void updateOneCameraFocusState(TotalCaptureResultProxy totalCaptureResult) {
     69         Float focusDistance = totalCaptureResult.get(CaptureResult.LENS_FOCUS_DISTANCE);
     70         Integer focusState = totalCaptureResult.get(CaptureResult.CONTROL_AF_STATE);
     71         if (focusDistance != null && focusState != null) {
     72             Set<Integer> activeStates = new HashSet<>();
     73             activeStates.add(CaptureResult.CONTROL_AF_STATE_ACTIVE_SCAN);
     74             activeStates.add(CaptureResult.CONTROL_AF_STATE_PASSIVE_SCAN);
     75             boolean active = activeStates.contains(focusState);
     76             mOneCameraFocusState.update(new OneCamera.FocusState(focusDistance, active));
     77         }
     78     }
     79 }
     80