| /* |
| * 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 static java.lang.Integer.toHexString; |
| |
| import android.annotation.Nullable; |
| import android.car.hardware.CarSensorEvent; |
| import android.hardware.automotive.vehicle.V2_0.VehiclePropConfig; |
| import android.hardware.automotive.vehicle.V2_0.VehiclePropValue; |
| |
| import android.util.Log; |
| import android.util.SparseArray; |
| import java.util.Collection; |
| 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 implements SensorBase { |
| private static final String TAG = "SensorHalServiceBase"; |
| |
| private boolean mIsReady = false; |
| |
| protected static final int SENSOR_TYPE_INVALID = NOT_SUPPORTED_PROPERTY; |
| protected final VehicleHal mHal; |
| protected final SparseArray<VehiclePropConfig> mSensorToPropConfig = new SparseArray<>(); |
| |
| public SensorHalServiceBase(VehicleHal hal) { |
| mHal = hal; |
| } |
| |
| @Override |
| public synchronized Collection<VehiclePropConfig> takeSupportedProperties( |
| Collection<VehiclePropConfig> allProperties) { |
| LinkedList<VehiclePropConfig> supportedProperties = new LinkedList<>(); |
| for (VehiclePropConfig halProperty : allProperties) { |
| int sensor = getTokenForProperty(halProperty); |
| if (sensor != SENSOR_TYPE_INVALID) { |
| supportedProperties.add(halProperty); |
| mSensorToPropConfig.append(sensor, halProperty); |
| } |
| } |
| return supportedProperties; |
| } |
| |
| @Override |
| public synchronized void init() { |
| mIsReady = true; |
| } |
| |
| @Override |
| public synchronized void release() { |
| mIsReady = false; |
| } |
| |
| /** |
| * Sensor HAL should be ready after init call. |
| * @return |
| */ |
| @Override |
| public synchronized boolean isReady() { |
| return mIsReady; |
| } |
| |
| /** |
| * This should work after {@link #init()}. |
| * @return |
| */ |
| @Override |
| public synchronized int[] getSupportedSensors() { |
| int[] supportedSensors = new int[mSensorToPropConfig.size()]; |
| for (int i = 0; i < supportedSensors.length; i++) { |
| supportedSensors[i] = mSensorToPropConfig.keyAt(i); |
| } |
| return supportedSensors; |
| } |
| |
| @Override |
| public synchronized boolean requestSensorStart(int sensorType, int rate) { |
| VehiclePropConfig config = mSensorToPropConfig.get(sensorType); |
| if (config == null) { |
| return false; |
| } |
| //TODO calculate sampling rate properly, bug: 32095903 |
| mHal.subscribeProperty(this, config.prop, fixSamplingRateForProperty(config, rate)); |
| return true; |
| } |
| |
| @Override |
| public synchronized void requestSensorStop(int sensorType) { |
| VehiclePropConfig config = mSensorToPropConfig.get(sensorType); |
| if (config == null) { |
| return; |
| } |
| mHal.unsubscribeProperty(this, config.prop); |
| } |
| |
| @Nullable |
| public VehiclePropValue getCurrentSensorVehiclePropValue(int sensorType) { |
| VehiclePropConfig config; |
| synchronized (this) { |
| config = mSensorToPropConfig.get(sensorType); |
| } |
| if (config == null) { |
| Log.e(TAG, "sensor type not available 0x" + |
| toHexString(sensorType)); |
| return null; |
| } |
| try { |
| return mHal.get(config.prop); |
| } catch (PropertyTimeoutException e) { |
| Log.e(TAG, "property not ready 0x" + toHexString(config.prop), e); |
| return null; |
| } |
| } |
| |
| |
| @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"); |
| } |
| |
| protected abstract float fixSamplingRateForProperty(VehiclePropConfig prop, |
| int carSensorManagerRate); |
| |
| /** |
| * Returns a unique token to be used to map this property to a higher-level sensor |
| * This token will be stored in mSensorToPropConfig to allow callers to go from unique |
| * sensor identifiers to VehiclePropConfig objects |
| * @param config |
| * @return SENSOR_TYPE_INVALID or a locally unique token |
| */ |
| protected abstract int getTokenForProperty(VehiclePropConfig config); |
| } |