CameraModule.java revision 3083642a424b74e8f7b898f26a045f438edfa042 
1/*
2 * Copyright (C) 2012 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;
18
19import android.view.KeyEvent;
20import android.view.View;
21
22import com.android.camera.app.AppController;
23import com.android.camera.app.CameraProvider;
24import com.android.camera.app.CameraServices;
25import com.android.camera.module.ModuleController;
26
27public abstract class CameraModule implements ModuleController {
28
29    /** Provides common services and functionality to the module. */
30    private final CameraServices mServices;
31    private final CameraProvider mCameraProvider;
32
33    public CameraModule(AppController app) {
34        mServices = app.getServices();
35        mCameraProvider = app.getCameraProvider();
36    }
37
38    @Override
39    public boolean onBackPressed() {
40        return false;
41    }
42
43    @Override
44    public void onPreviewVisibilityChanged(boolean visible) {
45        // Do nothing.
46    }
47
48    @Deprecated
49    public abstract boolean onKeyDown(int keyCode, KeyEvent event);
50
51    @Deprecated
52    public abstract boolean onKeyUp(int keyCode, KeyEvent event);
53
54    @Deprecated
55    public abstract void onSingleTapUp(View view, int x, int y);
56
57    /**
58     * @return An instance containing common services to be used by the module.
59     */
60    protected CameraServices getServices() {
61        return mServices;
62    }
63
64    /**
65     * @return An instance used by the module to get the camera.
66     */
67    protected CameraProvider getCameraProvider() {
68        return mCameraProvider;
69    }
70
71    /**
72     * Requests the back camera through {@link CameraProvider}.
73     * This calls {@link
74     * com.android.camera.app.CameraProvider#requestCamera(int)}. The camera
75     * will be returned through {@link
76     * #onCameraAvailable(com.android.camera.app.CameraManager.CameraProxy)}
77     * when it's available. This is a no-op when there's no back camera
78     * available.
79     */
80    protected void requestBackCamera() {
81        int backCameraId = mCameraProvider.getFirstBackCameraId();
82        if (backCameraId != -1) {
83            mCameraProvider.requestCamera(backCameraId);
84        }
85    }
86
87    public void onPreviewInitialDataReceived() {};
88
89    /**
90     * Releases the back camera through {@link CameraProvider}.
91     * This calls {@link
92     * com.android.camera.app.CameraProvider#releaseCamera(int)}.
93     * This is a no-op when there's no back camera available.
94     */
95    protected void releaseBackCamera() {
96        int backCameraId = mCameraProvider.getFirstBackCameraId();
97        if (backCameraId != -1) {
98            mCameraProvider.releaseCamera(backCameraId);
99        }
100    }
101}
102