HardwareSpecImpl.java revision b1641f5df0cf839b54385ea4d2e43521620fc237 
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 android.hardware.Camera;
20
21import com.android.camera.util.CameraUtil;
22import com.android.camera.util.GcamHelper;
23
24import java.util.List;
25
26/**
27 * HardwareSpecImpl is the default implementation of
28 * {@link com.android.camera.hardware.HardwareSpec} for
29 * a camera device opened using the {@link android.hardware.Camera}
30 * api.
31 */
32public class HardwareSpecImpl implements HardwareSpec {
33
34    private final boolean mIsFrontCameraSupported;
35    private final boolean mIsHdrSupported;
36    private final boolean mIsHdrPlusSupported;
37    private final boolean mIsFlashSupported;
38
39    /**
40     * Compute the supported values for all
41     * {@link com.android.camera.hardware.HardwareSpec} methods
42     * based on {@link android.hardware.Camera.Parameters}.
43     */
44    public HardwareSpecImpl(Camera.Parameters parameters) {
45        // Cache whether front camera is supported.
46        mIsFrontCameraSupported = (Camera.getNumberOfCameras() > 1);
47
48        // Cache whether hdr is supported.
49        mIsHdrSupported = CameraUtil.isCameraHdrSupported(parameters);
50
51        // Cache whether hdr plus is supported.
52        mIsHdrPlusSupported = GcamHelper.hasGcamCapture();
53
54        // Cache whether flash is supported.
55        mIsFlashSupported = isFlashSupported(parameters);
56    }
57
58    @Override
59    public boolean isFrontCameraSupported() {
60        return mIsFrontCameraSupported;
61    }
62
63    @Override
64    public boolean isHdrSupported() {
65        return mIsHdrSupported;
66    }
67
68    @Override
69    public boolean isHdrPlusSupported() {
70        return mIsHdrPlusSupported;
71    }
72
73    @Override
74    public boolean isFlashSupported() {
75        return mIsFlashSupported;
76    }
77
78    /**
79     * Returns whether flash is supported and flash has more than
80     * one possible value.
81     */
82    private boolean isFlashSupported(Camera.Parameters parameters) {
83        List<String> supportedFlashModes = parameters.getSupportedFlashModes();
84        return !(supportedFlashModes == null || (supportedFlashModes.size() == 1));
85    }
86}