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
29namespace android {
30// ---------------------------------------------------------------------------
31
32LinearAccelerationSensor::LinearAccelerationSensor(sensor_t const* list, size_t count)
33    : mSensorDevice(SensorDevice::getInstance()),
34      mGravitySensor(list, count)
35{
36}
37
38bool 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
53status_t LinearAccelerationSensor::activate(void* ident, bool enabled) {
54    return mGravitySensor.activate(this, enabled);
55}
56
57status_t LinearAccelerationSensor::setDelay(void* ident, int handle, int64_t ns) {
58    return mGravitySensor.setDelay(this, handle, ns);
59}
60
61Sensor LinearAccelerationSensor::getSensor() const {
62    Sensor gsensor(mGravitySensor.getSensor());
63    sensor_t hwSensor;
64    hwSensor.name       = "Linear Acceleration Sensor";
65    hwSensor.vendor     = "Google Inc.";
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