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 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
process(sensors_event_t * outEvent,const sensors_event_t & event)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
activate(void * ident,bool enabled)64 status_t LinearAccelerationSensor::activate(void* ident, bool enabled) {
65 return mGravitySensor.activate(ident, enabled);
66 }
67
setDelay(void * ident,int handle,int64_t ns)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