CameraAgentFactory.java revision d61058f788eae0805bb20c4f68874f0f6caef423 
1/*
2 * Copyright (C) 2013 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.ex.camera2.portability;
18
19/**
20 * A factory class for {@link CameraAgent}.
21 */
22public class CameraAgentFactory {
23
24    private static AndroidCameraAgentImpl sAndroidCameraAgent;
25    private static int sAndroidCameraAgentClientCount;
26
27    /**
28     * Returns the android camera implementation of {@link com.android.camera.cameradevice.CameraAgent}.
29     *
30     * @return The {@link CameraAgent} to control the camera device.
31     */
32    public static synchronized CameraAgent getAndroidCameraAgent() {
33        if (sAndroidCameraAgent == null) {
34            sAndroidCameraAgent = new AndroidCameraAgentImpl();
35            sAndroidCameraAgentClientCount = 1;
36        } else {
37            ++sAndroidCameraAgentClientCount;
38        }
39        return sAndroidCameraAgent;
40    }
41
42    /**
43     * Recycles the resources. Always call this method when the activity is
44     * stopped.
45     */
46    public static synchronized void recycle() {
47        if (--sAndroidCameraAgentClientCount == 0 && sAndroidCameraAgent != null) {
48            sAndroidCameraAgent.recycle();
49            sAndroidCameraAgent = null;
50        }
51    }
52}
53