sensor.cpp revision 99fe16508200510e3d8ea2e3c34872be8cce826d 
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/Looper.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
62ASensor const* ASensorManager_getDefaultSensorEx(ASensorManager* manager,
63        int type, bool wakeUp) {
64    Sensor const* const* sensorList;
65    size_t size = static_cast<SensorManager*>(manager)->getSensorList(&sensorList);
66    for (size_t i = 0; i < size; ++i) {
67        if (ASensor_getType(sensorList[i]) == type &&
68            ASensor_isWakeUpSensor(sensorList[i]) == wakeUp) {
69            return reinterpret_cast<ASensor const *>(sensorList[i]);
70       }
71    }
72    return NULL;
73}
74
75ASensorEventQueue* ASensorManager_createEventQueue(ASensorManager* manager,
76        ALooper* looper, int ident, ALooper_callbackFunc callback, void* data)
77{
78    sp<SensorEventQueue> queue =
79            static_cast<SensorManager*>(manager)->createEventQueue();
80    if (queue != 0) {
81        ALooper_addFd(looper, queue->getFd(), ident, ALOOPER_EVENT_INPUT, callback, data);
82        queue->looper = looper;
83        queue->incStrong(manager);
84    }
85    return static_cast<ASensorEventQueue*>(queue.get());
86}
87
88int ASensorManager_destroyEventQueue(ASensorManager* manager,
89        ASensorEventQueue* inQueue)
90{
91    sp<SensorEventQueue> queue = static_cast<SensorEventQueue*>(inQueue);
92    ALooper_removeFd(queue->looper, queue->getFd());
93    queue->decStrong(manager);
94    return 0;
95}
96
97/*****************************************************************************/
98
99int ASensorEventQueue_enableSensor(ASensorEventQueue* queue, ASensor const* sensor)
100{
101    return static_cast<SensorEventQueue*>(queue)->enableSensor(
102            static_cast<Sensor const*>(sensor));
103}
104
105int ASensorEventQueue_disableSensor(ASensorEventQueue* queue, ASensor const* sensor)
106{
107    return static_cast<SensorEventQueue*>(queue)->disableSensor(
108            static_cast<Sensor const*>(sensor));
109}
110
111int ASensorEventQueue_setEventRate(ASensorEventQueue* queue, ASensor const* sensor,
112        int32_t usec)
113{
114    return static_cast<SensorEventQueue*>(queue)->setEventRate(
115            static_cast<Sensor const*>(sensor), us2ns(usec));
116}
117
118int ASensorEventQueue_hasEvents(ASensorEventQueue* queue)
119{
120    struct pollfd pfd;
121    pfd.fd = static_cast<SensorEventQueue*>(queue)->getFd();
122    pfd.events = POLLIN;
123    pfd.revents = 0;
124
125    int nfd = poll(&pfd, 1, 0);
126
127    if (nfd < 0)
128        return -errno;
129
130    if (pfd.revents != POLLIN)
131        return -1;
132
133    return (nfd == 0) ? 0 : 1;
134}
135
136ssize_t ASensorEventQueue_getEvents(ASensorEventQueue* queue,
137                ASensorEvent* events, size_t count)
138{
139    ssize_t actual = static_cast<SensorEventQueue*>(queue)->read(events, count);
140    if (actual > 0) {
141        static_cast<SensorEventQueue*>(queue)->sendAck(events, actual);
142    }
143    return actual;
144}
145
146/*****************************************************************************/
147
148const char* ASensor_getName(ASensor const* sensor)
149{
150    return static_cast<Sensor const*>(sensor)->getName().string();
151}
152
153const char* ASensor_getVendor(ASensor const* sensor)
154{
155    return static_cast<Sensor const*>(sensor)->getVendor().string();
156}
157
158int ASensor_getType(ASensor const* sensor)
159{
160    return static_cast<Sensor const*>(sensor)->getType();
161}
162
163float ASensor_getResolution(ASensor const* sensor)
164{
165    return static_cast<Sensor const*>(sensor)->getResolution();
166}
167
168int ASensor_getMinDelay(ASensor const* sensor)
169{
170    return static_cast<Sensor const*>(sensor)->getMinDelay();
171}
172
173int ASensor_getFifoMaxEventCount(ASensor const* sensor)
174{
175    return static_cast<Sensor const*>(sensor)->getFifoMaxEventCount();
176}
177
178int ASensor_getFifoReservedEventCount(ASensor const* sensor)
179{
180    return static_cast<Sensor const*>(sensor)->getFifoReservedEventCount();
181}
182
183const char* ASensor_getStringType(ASensor const* sensor)
184{
185    return static_cast<Sensor const*>(sensor)->getStringType().string();
186}
187
188int ASensor_getReportingMode(ASensor const* sensor)
189{
190    return static_cast<Sensor const*>(sensor)->getReportingMode();
191}
192
193bool ASensor_isWakeUpSensor(ASensor const* sensor)
194{
195    return static_cast<Sensor const*>(sensor)->isWakeUpSensor();
196}