source: flair-src/trunk/demos/Sinus/src/MeanFilter.cpp@ 16

Last change on this file since 16 was 16, checked in by Bayard Gildas, 6 years ago

Reformatting

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1// created: 2013/06/27
2// filename: MeanFilter.cpp
3//
4// author: Guillaume Sanahuja
5// Copyright Heudiasyc UMR UTC/CNRS 7253
6//
7// version: $Id: $
8//
9// purpose: object computing a mean filter
10//
11//
12/*********************************************************************/
13
14#include "MeanFilter.h"
15#include <cvmatrix.h>
16#include <LayoutPosition.h>
17#include <GroupBox.h>
18#include <SpinBox.h>
19
20using namespace std;
21using namespace flair::core;
22using namespace flair::gui;
23
24namespace flair {
25namespace filter {
26
27MeanFilter::MeanFilter(const IODevice *parent, const LayoutPosition *position,
28 string name)
29 : IODevice(parent, name) {
30 // interface initialisation
31 groupBox = new GroupBox(position, name);
32 numberOfElements = new SpinBox(groupBox->NewRow(), "numberOfElements:", 1,
33 MAX_NUMBER_OF_ELEMENTS,
34 1); // saturated to MAX_NUMBER_OF_ELEMENTS
35
36 // init storage
37 for (int i = 0; i < MAX_NUMBER_OF_ELEMENTS; i++)
38 previousValues[i] = 0;
39
40 // 1*1 output matrix
41 cvmatrix_descriptor *desc = new cvmatrix_descriptor(1, 1);
42 desc->SetElementName(0, 0,
43 "mean filter"); // name will be used for graphs and logs
44 output = new cvmatrix(this, desc, floatType, name);
45
46 AddDataToLog(output);
47}
48
49MeanFilter::~MeanFilter() {}
50
51cvmatrix *MeanFilter::GetMatrix() const { return output; }
52
53float MeanFilter::GetValue(void) const { return output->Value(0, 0); }
54
55// UpdateFrom, where we implement the filter
56// this method is automatically called when the parent IODevice calls
57// ProcessUpdate
58// in our case it is the sinus or the 1st orde law pass filter
59//(see in Sinus::Run the call to ProcessUpdate)
60void MeanFilter::UpdateFrom(const io_data *data) {
61
62 float result = 0;
63 // get input argument in a cvmatrix
64 cvmatrix *input = (cvmatrix *)data;
65
66 // simple (and not efficent!) implementation of the filter
67 previousValues[numberOfElements->Value() - 1] = input->Value(0, 0);
68 for (int i = 0; i < numberOfElements->Value(); i++)
69 result += previousValues[i];
70 for (int i = 1; i < numberOfElements->Value(); i++)
71 previousValues[i - 1] = previousValues[i];
72
73 // put the result in output matrix
74 output->SetValue(0, 0, result / numberOfElements->Value());
75 // put corresponding time
76 output->SetDataTime(data->DataTime());
77
78 // ProcessUpdate is very important
79 // we must call it after updating the output matrix
80 // it allows:
81 // -to save value in the logs
82 // -to automatically call the next filter UpdateFrom method
83 ProcessUpdate(output);
84}
85} // end namespace filter
86} // end namespace flair
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