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
LinearAccelerationSensor(sensor_t const * list,size_t count)32 LinearAccelerationSensor::LinearAccelerationSensor(sensor_t const* list, size_t count)
33 : mSensorDevice(SensorDevice::getInstance()),
34 mGravitySensor(list, count)
35 {
36 }
37
process(sensors_event_t * outEvent,const sensors_event_t & event)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
activate(void * ident,bool enabled)53 status_t LinearAccelerationSensor::activate(void* ident, bool enabled) {
54 return mGravitySensor.activate(ident, enabled);
55 }
56
setDelay(void * ident,int handle,int64_t ns)57 status_t LinearAccelerationSensor::setDelay(void* ident, int handle, int64_t ns) {
58 return mGravitySensor.setDelay(ident, handle, ns);
59 }
60
getSensor() const61 Sensor LinearAccelerationSensor::getSensor() const {
62 Sensor gsensor(mGravitySensor.getSensor());
63 sensor_t hwSensor;
64 hwSensor.name = "Linear Acceleration Sensor";
65 hwSensor.vendor = "AOSP";
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