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        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
49bool 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
64status_t LinearAccelerationSensor::activate(void* ident, bool enabled) {
65    return mGravitySensor.activate(ident, enabled);
66}
67
68status_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