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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