sensord: samsung pedometer sensor for fused location fix/update.
[platform/core/system/sensord.git] / src / sensor / pedometer / savitzky_golay_filter15.h
1 /*
2  *  Copyright (c) 2016-2017 Samsung Electronics Co., Ltd.
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 __SAVITZKYGOLAYFILTER15_H__
18 #define __SAVITZKYGOLAYFILTER15_H__
19
20 #include "timestamp.h"
21
22 /************************************************************************
23  * stores Savitzky-Golay filter state.
24  */
25 class savitzky_golay_filter15 {
26 public:
27
28         savitzky_golay_filter15();
29
30         ~savitzky_golay_filter15();
31
32         /************************************************************************
33          * filters input data.
34          *
35          * @param value
36          *              data to filter.
37          * @result filtered data.
38          */
39         double filter(double value);
40
41         /************************************************************************
42          * resets Savitzky-Golay filter to initial state.
43          */
44         void reset(void);
45
46 private:
47         double *m_array;
48         bool m_empty;
49 };
50
51 #endif /* __SAVITZKYGOLAYFILTER15_H__ */