1 /* 2 * Copyright (C) 2010 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 17 #include <stdint.h> 18 #include <math.h> 19 #include <sys/types.h> 20 21 #include <utils/Errors.h> 22 23 #include <hardware/sensors.h> 24 25 #include "LinearAccelerationSensor.h" 26 #include "SensorDevice.h" 27 #include "SensorFusion.h" 28 29 namespace android { 30 // --------------------------------------------------------------------------- 31 32 LinearAccelerationSensor::LinearAccelerationSensor(sensor_t const* list, size_t count) 33 : mSensorDevice(SensorDevice::getInstance()), 34 mGravitySensor(list, count) 35 { 36 } 37 38 bool LinearAccelerationSensor::process(sensors_event_t* outEvent, 39 const sensors_event_t& event) 40 { 41 bool result = mGravitySensor.process(outEvent, event); 42 if (result && event.type == SENSOR_TYPE_ACCELEROMETER) { 43 outEvent->data[0] = event.acceleration.x - outEvent->data[0]; 44 outEvent->data[1] = event.acceleration.y - outEvent->data[1]; 45 outEvent->data[2] = event.acceleration.z - outEvent->data[2]; 46 outEvent->sensor = '_lin'; 47 outEvent->type = SENSOR_TYPE_LINEAR_ACCELERATION; 48 return true; 49 } 50 return false; 51 } 52 53 status_t LinearAccelerationSensor::activate(void* ident, bool enabled) { 54 return mGravitySensor.activate(this, enabled); 55 } 56 57 status_t LinearAccelerationSensor::setDelay(void* ident, int handle, int64_t ns) { 58 return mGravitySensor.setDelay(this, handle, ns); 59 } 60 61 Sensor LinearAccelerationSensor::getSensor() const { 62 Sensor gsensor(mGravitySensor.getSensor()); 63 sensor_t hwSensor; 64 hwSensor.name = "Linear Acceleration Sensor"; 65 hwSensor.vendor = "Google Inc."; 66 hwSensor.version = gsensor.getVersion(); 67 hwSensor.handle = '_lin'; 68 hwSensor.type = SENSOR_TYPE_LINEAR_ACCELERATION; 69 hwSensor.maxRange = gsensor.getMaxValue(); 70 hwSensor.resolution = gsensor.getResolution(); 71 hwSensor.power = gsensor.getPowerUsage(); 72 hwSensor.minDelay = gsensor.getMinDelay(); 73 Sensor sensor(&hwSensor); 74 return sensor; 75 } 76 77 // --------------------------------------------------------------------------- 78 }; // namespace android 79 80
