CameraProvider.java revision 18500a493634b593dc8ba1e74b46d1f10bb6d031 
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;
20
21/**
22 * An interface which defines the camera provider.
23 */
24public interface CameraProvider {
25
26    /**
27     * Requests the camera device. If the camera device of the same ID is
28     * already requested, then no-op here.
29     *
30     * @param id The ID of the requested camera device.
31     */
32    public void requestCamera(int id);
33
34    /**
35     * Releases the camera device.
36     *
37     * @param id The camera ID.
38     */
39    public void releaseCamera(int id);
40
41    /**
42     * Get the {@link android.hardware.Camera.CameraInfo} of all the cameras.
43     *
44     * @return An array of the {@link android.hardware.Camera.CameraInfo}.
45     */
46    public Camera.CameraInfo[] getCameraInfo();
47
48    /**
49     * Returns the total number of cameras available on the device.
50     */
51    public int getNumberOfCameras();
52
53    /**
54     * @returns The lowest ID of the back camera or -1 if not available.
55     */
56    public int getFirstBackCameraId();
57
58    /**
59     * @return The lowest ID of the front camera or -1 if not available.
60     */
61    public int getFirstFrontCameraId();
62}
63