1/*
2 * Copyright (C) 2017 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#ifndef A_SENSOR_EVENT_QUEUE_H_
18
19#define A_SENSOR_EVENT_QUEUE_H_
20
21#include <android/frameworks/sensorservice/1.0/IEventQueue.h>
22#include <android/frameworks/sensorservice/1.0/IEventQueueCallback.h>
23#include <android/looper.h>
24#include <android/sensor.h>
25#include <android-base/macros.h>
26#include <sensors/convert.h>
27#include <utils/Mutex.h>
28
29struct ALooper;
30
31struct ASensorEventQueue
32    : public android::frameworks::sensorservice::V1_0::IEventQueueCallback {
33    using Event = android::hardware::sensors::V1_0::Event;
34    using IEventQueue = android::frameworks::sensorservice::V1_0::IEventQueue;
35
36    ASensorEventQueue(
37            ALooper *looper,
38            int ident,
39            ALooper_callbackFunc callback,
40            void *data);
41
42    android::hardware::Return<void> onEvent(const Event &event) override;
43
44    void setImpl(const android::sp<IEventQueue> &queueImpl);
45
46    int registerSensor(
47            ASensorRef sensor,
48            int32_t samplingPeriodUs,
49            int64_t maxBatchReportLatencyUs);
50
51    int enableSensor(ASensorRef sensor);
52    int disableSensor(ASensorRef sensor);
53
54    int setEventRate(ASensorRef sensor, int32_t samplingPeriodUs);
55
56    ssize_t getEvents(ASensorEvent *events, size_t count);
57    int hasEvents() const;
58
59    void dispatchCallback();
60
61    void invalidate();
62
63private:
64    ALooper *mLooper;
65    int mIdent;
66    ALooper_callbackFunc mCallback;
67    void *mData;
68    android::sp<IEventQueue> mQueueImpl;
69
70    android::Mutex mLock;
71    std::vector<sensors_event_t> mQueue;
72
73    DISALLOW_COPY_AND_ASSIGN(ASensorEventQueue);
74};
75
76#endif  // A_SENSOR_EVENT_QUEUE_H_
77
78