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 mGravitySensor(list, count) { 34 const Sensor &gsensor = mGravitySensor.getSensor(); 35 const sensor_t sensor = { 36 .name = "Linear Acceleration Sensor", 37 .vendor = "AOSP", 38 .version = gsensor.getVersion(), 39 .handle = '_lin', 40 .type = SENSOR_TYPE_LINEAR_ACCELERATION, 41 .maxRange = gsensor.getMaxValue(), 42 .resolution = gsensor.getResolution(), 43 .power = gsensor.getPowerUsage(), 44 .minDelay = gsensor.getMinDelay(), 45 }; 46 mSensor = Sensor(&sensor); 47 } 48 49 bool LinearAccelerationSensor::process(sensors_event_t* outEvent, 50 const sensors_event_t& event) 51 { 52 bool result = mGravitySensor.process(outEvent, event); 53 if (result && event.type == SENSOR_TYPE_ACCELEROMETER) { 54 outEvent->data[0] = event.acceleration.x - outEvent->data[0]; 55 outEvent->data[1] = event.acceleration.y - outEvent->data[1]; 56 outEvent->data[2] = event.acceleration.z - outEvent->data[2]; 57 outEvent->sensor = '_lin'; 58 outEvent->type = SENSOR_TYPE_LINEAR_ACCELERATION; 59 return true; 60 } 61 return false; 62 } 63 64 status_t LinearAccelerationSensor::activate(void* ident, bool enabled) { 65 return mGravitySensor.activate(ident, enabled); 66 } 67 68 status_t LinearAccelerationSensor::setDelay(void* ident, int handle, int64_t ns) { 69 return mGravitySensor.setDelay(ident, handle, ns); 70 } 71 72 // --------------------------------------------------------------------------- 73 }; // namespace android 74 75
