CameraProvider.java revision 5a344964cb003525727c31d295ca3a592c245606 
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.camera.app;
18
19import android.hardware.Camera;
20import android.os.Handler;
21
22import com.android.ex.camera2.portability.CameraAgent.CameraExceptionCallback;
23
24/**
25 * An interface which defines the camera provider.
26 */
27public interface CameraProvider {
28
29    /**
30     * Requests the camera device. If the camera device of the same ID is
31     * already requested, then no-op here.
32     *
33     * @param id The ID of the requested camera device.
34     */
35    public void requestCamera(int id);
36
37    public boolean waitingForCamera();
38
39    /**
40     * Releases the camera device.
41     *
42     * @param id The camera ID.
43     */
44    public void releaseCamera(int id);
45
46    /**
47     * Sets a callback for handling camera api runtime exceptions on
48     * a handler.
49     */
50    public void setCameraDefaultExceptionCallback(CameraExceptionCallback callback,
51            Handler handler);
52
53    /**
54     * Get the {@link android.hardware.Camera.CameraInfo} of all the cameras.
55     *
56     * @return An array of the {@link android.hardware.Camera.CameraInfo}.
57     */
58    public Camera.CameraInfo[] getCameraInfo();
59
60    /**
61     * Returns the total number of cameras available on the device.
62     */
63    public int getNumberOfCameras();
64
65    /**
66     * @returns The lowest ID of the back camera or -1 if not available.
67     */
68    public int getFirstBackCameraId();
69
70    /**
71     * @return The lowest ID of the front camera or -1 if not available.
72     */
73    public int getFirstFrontCameraId();
74
75    /**
76     * @returns Whether the camera is facing front.
77     */
78    public boolean isFrontFacingCamera(int id);
79
80    /**
81     * @returns Whether the camera is facing back.
82     */
83    public boolean isBackFacingCamera(int id);
84}
85