| /* |
| * Copyright (C) 2015 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.car.hal; |
| |
| import android.car.hardware.CarSensorEvent; |
| |
| import com.android.car.vehiclenetwork.VehicleNetworkProto.VehiclePropConfig; |
| import com.android.car.vehiclenetwork.VehicleNetworkProto.VehiclePropValue; |
| |
| import java.io.PrintWriter; |
| import java.util.LinkedList; |
| import java.util.List; |
| |
| /** |
| * Common base for all SensorHal implementation. |
| * It is wholly based on subscription and there is no explicit API for polling, but each sensor |
| * should report its initial state immediately after {@link #requestSensorStart(int, int)} call. |
| * It is ok to report sensor data {@link SensorListener#onSensorData(CarSensorEvent)} inside |
| * the {@link #requestSensorStart(int, int)} call. |
| */ |
| public abstract class SensorHalServiceBase extends HalServiceBase { |
| /** |
| * Listener for monitoring sensor event. Only sensor service will implement this. |
| */ |
| public interface SensorListener { |
| /** |
| * Sensor events are available. |
| * @param events |
| */ |
| void onSensorEvents(List<CarSensorEvent> events); |
| } |
| |
| private final LinkedList<CarSensorEvent> mDispatchQ = new LinkedList<CarSensorEvent>(); |
| |
| public abstract void registerSensorListener(SensorListener listener); |
| |
| /** |
| * Sensor HAL should be ready after init call. |
| * @return |
| */ |
| public abstract boolean isReady(); |
| |
| /** |
| * This should work after {@link #init()}. |
| * @return |
| */ |
| public abstract int[] getSupportedSensors(); |
| |
| public abstract boolean requestSensorStart(int sensorType, int rate); |
| |
| public abstract void requestSensorStop(int sensorType); |
| |
| /** |
| * Utility to help service to send one event as listener only takes list form. |
| * @param listener |
| * @param event |
| */ |
| protected void dispatchCarSensorEvent(SensorListener listener, CarSensorEvent event) { |
| synchronized (mDispatchQ) { |
| mDispatchQ.add(event); |
| listener.onSensorEvents(mDispatchQ); |
| mDispatchQ.clear(); |
| } |
| } |
| |
| @Override |
| public void handleHalEvents(List<VehiclePropValue> values) { |
| // default no-op impl. Necessary to not propagate this HAL specific event to logical |
| // sensor provider. |
| throw new RuntimeException("should not be called"); |
| } |
| |
| @Override |
| public List<VehiclePropConfig> takeSupportedProperties(List<VehiclePropConfig> allProperties) { |
| return null; |
| } |
| } |