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 27 namespace android { 28 // --------------------------------------------------------------------------- 29 30 LinearAccelerationSensor::LinearAccelerationSensor(sensor_t const* list, size_t count) 31 : mSensorDevice(SensorDevice::getInstance()), 32 mGravitySensor(list, count) 33 { 34 mData[0] = mData[1] = mData[2] = 0; 35 } 36 37 bool LinearAccelerationSensor::process(sensors_event_t* outEvent, 38 const sensors_event_t& event) 39 { 40 bool result = mGravitySensor.process(outEvent, event); 41 if (result) { 42 if (event.type == SENSOR_TYPE_ACCELEROMETER) { 43 mData[0] = event.acceleration.x; 44 mData[1] = event.acceleration.y; 45 mData[2] = event.acceleration.z; 46 } 47 outEvent->data[0] = mData[0] - outEvent->data[0]; 48 outEvent->data[1] = mData[1] - outEvent->data[1]; 49 outEvent->data[2] = mData[2] - outEvent->data[2]; 50 outEvent->sensor = '_lin'; 51 outEvent->type = SENSOR_TYPE_LINEAR_ACCELERATION; 52 } 53 return result; 54 } 55 56 bool LinearAccelerationSensor::isEnabled() const { 57 return mGravitySensor.isEnabled(); 58 } 59 60 status_t LinearAccelerationSensor::activate(void* ident, bool enabled) { 61 return mGravitySensor.activate(ident, enabled); 62 } 63 64 status_t LinearAccelerationSensor::setDelay(void* ident, int handle, int64_t ns) { 65 return mGravitySensor.setDelay(ident, handle, ns); 66 } 67 68 Sensor LinearAccelerationSensor::getSensor() const { 69 Sensor gsensor(mGravitySensor.getSensor()); 70 sensor_t hwSensor; 71 hwSensor.name = "Linear Acceleration Sensor"; 72 hwSensor.vendor = "Google Inc."; 73 hwSensor.version = 1; 74 hwSensor.handle = '_lin'; 75 hwSensor.type = SENSOR_TYPE_LINEAR_ACCELERATION; 76 hwSensor.maxRange = gsensor.getMaxValue(); 77 hwSensor.resolution = gsensor.getResolution(); 78 hwSensor.power = gsensor.getPowerUsage(); 79 hwSensor.minDelay = gsensor.getMinDelay(); 80 Sensor sensor(&hwSensor); 81 return sensor; 82 } 83 84 // --------------------------------------------------------------------------- 85 }; // namespace android 86 87
