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
17package com.android.camera.one.v2.common;
18
19import android.hardware.camera2.CaptureRequest;
20
21import com.android.camera.one.OneCamera;
22import com.google.common.base.Supplier;
23
24/**
25 * Computes the current AE Mode to use based on the current flash state.
26 */
27public class FlashBasedAEMode implements Supplier<Integer> {
28    private final Supplier<OneCamera.PhotoCaptureParameters.Flash> mFlash;
29    private final Supplier<Boolean> mHdrSceneMode;
30
31    public FlashBasedAEMode(
32          Supplier<OneCamera.PhotoCaptureParameters.Flash> flash,
33          Supplier<Boolean> hdrSceneMode) {
34        mFlash = flash;
35        mHdrSceneMode = hdrSceneMode;
36    }
37
38    @Override
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