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.hardware;
18
19import com.android.camera.app.CameraProvider;
20import com.android.camera.one.OneCamera;
21import com.android.camera.one.config.OneCameraFeatureConfig;
22import com.android.camera.util.GcamHelper;
23import com.android.ex.camera2.portability.CameraCapabilities;
24
25/**
26 * HardwareSpecImpl is the default implementation of
27 * {@link com.android.camera.hardware.HardwareSpec} for
28 * a camera device opened using the {@link android.hardware.Camera}
29 * api.
30 */
31public class HardwareSpecImpl implements HardwareSpec {
32
33    private final boolean mIsFrontCameraSupported;
34    private final boolean mIsHdrSupported;
35    private final boolean mIsHdrPlusSupported;
36    private final boolean mIsFlashSupported;
37
38    /**
39     * Compute the supported values for all
40     * {@link com.android.camera.hardware.HardwareSpec} methods
41     */
42    public HardwareSpecImpl(CameraProvider provider, CameraCapabilities capabilities,
43                            OneCameraFeatureConfig featureConfig, boolean isFrontCamera) {
44        // Cache whether front camera is supported.
45        mIsFrontCameraSupported = (provider.getFirstFrontCameraId() != -1);
46
47        // Cache whether hdr is supported.
48        mIsHdrSupported = capabilities.supports(CameraCapabilities.SceneMode.HDR);
49
50        // Cache whether hdr plus is supported.
51        OneCamera.Facing cameraFacing =
52                isFrontCamera ? OneCamera.Facing.FRONT : OneCamera.Facing.BACK;
53        mIsHdrPlusSupported = featureConfig.getHdrPlusSupportLevel(cameraFacing) !=
54                OneCameraFeatureConfig.HdrPlusSupportLevel.NONE;
55
56        // Cache whether flash is supported.
57        mIsFlashSupported = isFlashSupported(capabilities);
58    }
59
60    @Override
61    public boolean isFrontCameraSupported() {
62        return mIsFrontCameraSupported;
63    }
64
65    @Override
66    public boolean isHdrSupported() {
67        return mIsHdrSupported;
68    }
69
70    @Override
71    public boolean isHdrPlusSupported() {
72        return mIsHdrPlusSupported;
73    }
74
75    @Override
76    public boolean isFlashSupported() {
77        return mIsFlashSupported;
78    }
79
80    /**
81     * Returns whether flash is supported and flash has more than
82     * one possible value.
83     */
84    private boolean isFlashSupported(CameraCapabilities capabilities) {
85        return (capabilities.supports(CameraCapabilities.FlashMode.AUTO) || capabilities.supports
86                (CameraCapabilities.FlashMode.ON));
87    }
88}
89