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.common;
18 
19 import android.hardware.camera2.CaptureRequest;
20 
21 import com.android.camera.one.OneCamera;
22 import com.google.common.base.Supplier;
23 
24 /**
25  * Computes the current AE Mode to use based on the current flash state.
26  */
27 public class FlashBasedAEMode implements Supplier<Integer> {
28     private final Supplier<OneCamera.PhotoCaptureParameters.Flash> mFlash;
29     private final Supplier<Boolean> mHdrSceneMode;
30 
FlashBasedAEMode( Supplier<OneCamera.PhotoCaptureParameters.Flash> flash, Supplier<Boolean> hdrSceneMode)31     public FlashBasedAEMode(
32           Supplier<OneCamera.PhotoCaptureParameters.Flash> flash,
33           Supplier<Boolean> hdrSceneMode) {
34         mFlash = flash;
35         mHdrSceneMode = hdrSceneMode;
36     }
37 
38     @Override
get()39     public Integer get() {
40         // In the case that hdr scene mode is on, disable flash.
41         if (mHdrSceneMode.get()) {
42             return CaptureRequest.CONTROL_AE_MODE_ON;
43         }
44 
45         switch (mFlash.get()) {
46             case AUTO:
47                 return CaptureRequest.CONTROL_AE_MODE_ON_AUTO_FLASH;
48             case ON:
49                 return CaptureRequest.CONTROL_AE_MODE_ON_ALWAYS_FLASH;
50             case OFF:
51                 return CaptureRequest.CONTROL_AE_MODE_ON;
52             default:
53                 return CaptureRequest.CONTROL_AE_MODE_ON;
54         }
55     }
56 }
57