blob: bd862669011ac986ee5ce7ef220fa1c19abd32b5 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
|
/*
* Copyright (C) 2019 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef _UI_INPUT_STATISTICS_H
#define _UI_INPUT_STATISTICS_H
#include <android-base/chrono_utils.h>
#include <stddef.h>
namespace android {
class LatencyStatistics {
private:
/* Minimum sample recorded */
float mMin;
/* Maximum sample recorded */
float mMax;
/* Sum of all samples recorded */
float mSum;
/* Sum of all the squares of samples recorded */
float mSum2;
/* Count of all samples recorded */
size_t mCount;
/* The last time statistics were reported */
std::chrono::steady_clock::time_point mLastReportTime;
/* Statistics Report Frequency */
const std::chrono::seconds mReportPeriod;
public:
LatencyStatistics(std::chrono::seconds period);
void addValue(float);
void reset();
bool shouldReport();
float getMean();
float getMin();
float getMax();
float getStDev();
size_t getCount();
};
} // namespace android
#endif // _UI_INPUT_STATISTICS_H
|