1/*
2 * Copyright (C) 2015 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 android.car.hardware;
18
19import android.car.hardware.CarSensorEvent;
20import android.car.hardware.ICarSensorEventListener;
21
22/** @hide */
23interface ICarSensor {
24
25    int[] getSupportedSensors() = 0;
26
27    /**
28     * register a listener or update registration if already updated.
29     * @param sensorType sensor to listen with this listener.
30     * @param rate sensor rate.
31     * @return false if requested sensors cannot be subscribed / started.
32     */
33    boolean registerOrUpdateSensorListener(int sensorType, int rate,
34            in ICarSensorEventListener listener) = 1;
35
36    /**
37     * get latest sensor event for the type. If there was no update after car connection, it will
38     * return null immediately.
39     */
40    CarSensorEvent getLatestSensorEvent(int sensorType) = 2;
41
42    /**
43     * Stop listening for the given sensor type. All other sensors registered before will not
44     * be affected.
45     */
46    void unregisterSensorListener(int sensorType, in ICarSensorEventListener listener) = 3;
47}
48