sensor.cpp revision 1bf797857e025e8a71db86fb9e79765a767ec1eb
1/*
2 * Copyright (C) 2009 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#define LOG_TAG "sensor"
18#include <utils/Log.h>
19
20#include <android/looper.h>
21#include <android/sensor.h>
22
23#include <utils/RefBase.h>
24#include <utils/PollLoop.h>
25#include <utils/Timers.h>
26
27#include <gui/Sensor.h>
28#include <gui/SensorManager.h>
29#include <gui/SensorEventQueue.h>
30
31#include <poll.h>
32
33using android::sp;
34using android::Sensor;
35using android::SensorManager;
36using android::SensorEventQueue;
37using android::String8;
38
39/*****************************************************************************/
40
41ASensorManager* ASensorManager_getInstance()
42{
43    return &SensorManager::getInstance();
44}
45
46int ASensorManager_getSensorList(ASensorManager* manager,
47        ASensorList* list)
48{
49    Sensor const* const* l;
50    int c = static_cast<SensorManager*>(manager)->getSensorList(&l);
51    if (list) {
52        *list = reinterpret_cast<ASensorList>(l);
53    }
54    return c;
55}
56
57ASensor const* ASensorManager_getDefaultSensor(ASensorManager* manager, int type)
58{
59    return static_cast<SensorManager*>(manager)->getDefaultSensor(type);
60}
61
62ASensorEventQueue* ASensorManager_createEventQueue(ASensorManager* manager,
63        ALooper* looper, ALooper_callbackFunc* callback, void* data)
64{
65    sp<SensorEventQueue> queue =
66            static_cast<SensorManager*>(manager)->createEventQueue();
67    if (queue != 0) {
68        ALooper_addFd(looper, queue->getFd(), POLLIN, callback, data);
69        queue->looper = looper;
70        queue->incStrong(manager);
71    }
72    return static_cast<ASensorEventQueue*>(queue.get());
73}
74
75int ASensorManager_destroyEventQueue(ASensorManager* manager,
76        ASensorEventQueue* inQueue)
77{
78    sp<SensorEventQueue> queue = static_cast<SensorEventQueue*>(inQueue);
79    ALooper_removeFd(queue->looper, queue->getFd());
80    queue->decStrong(manager);
81    return 0;
82}
83
84/*****************************************************************************/
85
86int ASensorEventQueue_enableSensor(ASensorEventQueue* queue, ASensor const* sensor)
87{
88    return static_cast<SensorEventQueue*>(queue)->enableSensor(
89            static_cast<Sensor const*>(sensor));
90}
91
92int ASensorEventQueue_disableSensor(ASensorEventQueue* queue, ASensor const* sensor)
93{
94    return static_cast<SensorEventQueue*>(queue)->disableSensor(
95            static_cast<Sensor const*>(sensor));
96}
97
98int ASensorEventQueue_setEventRate(ASensorEventQueue* queue, ASensor const* sensor,
99        int32_t usec)
100{
101    return static_cast<SensorEventQueue*>(queue)->setEventRate(
102            static_cast<Sensor const*>(sensor), us2ns(usec));
103}
104
105int ASensorEventQueue_hasEvents(ASensorEventQueue* queue)
106{
107    struct pollfd pfd;
108    pfd.fd = static_cast<SensorEventQueue*>(queue)->getFd();
109    pfd.events = POLLIN;
110    pfd.revents = 0;
111
112    int nfd = poll(&pfd, 1, 0);
113
114    if (nfd < 0)
115        return -errno;
116
117    if (pfd.revents != POLLIN)
118        return -1;
119
120    return (nfd == 0) ? 0 : 1;
121}
122
123ssize_t ASensorEventQueue_getEvents(ASensorEventQueue* queue,
124                ASensorEvent* events, size_t count)
125{
126    return static_cast<SensorEventQueue*>(queue)->read(events, count);
127}
128
129
130/*****************************************************************************/
131
132const char* ASensor_getName(ASensor const* sensor)
133{
134    return static_cast<Sensor const*>(sensor)->getName().string();
135}
136
137const char* ASensor_getVendor(ASensor const* sensor)
138{
139    return static_cast<Sensor const*>(sensor)->getVendor().string();
140}
141
142int ASensor_getType(ASensor const* sensor)
143{
144    return static_cast<Sensor const*>(sensor)->getType();
145}
146
147float ASensor_getResolution(ASensor const* sensor)
148{
149    return static_cast<Sensor const*>(sensor)->getResolution();
150}
151
152