source: flair-src/trunk/lib/FlairFilter/src/ButterworthLowPass_impl.cpp@ 137

Last change on this file since 137 was 15, checked in by Bayard Gildas, 6 years ago

sources reformatted with flair-format-dir script

File size: 2.5 KB
Line 
1// %flair:license{
2// This file is part of the Flair framework distributed under the
3// CECILL-C License, Version 1.0.
4// %flair:license}
5// created: 2013/12/10
6// filename: ButterworthLowPass_impl.cpp
7//
8// author: Guillaume Sanahuja
9// Copyright Heudiasyc UMR UTC/CNRS 7253
10//
11// version: $Id: $
12//
13// purpose: objet permettant le calcul d'un filtre passe bas de Butterworth
14//
15//
16/*********************************************************************/
17
18#include "ButterworthLowPass_impl.h"
19#include "ButterworthLowPass.h"
20#include <cvmatrix.h>
21#include <Layout.h>
22#include <GroupBox.h>
23#include <SpinBox.h>
24#include <DoubleSpinBox.h>
25
26using std::string;
27using namespace flair::core;
28using namespace flair::gui;
29using namespace flair::filter;
30
31ButterworthLowPass_impl::ButterworthLowPass_impl(ButterworthLowPass *self,
32 const LayoutPosition *position,
33 string name, int order) {
34 // init UI
35 GroupBox *reglages_groupbox = new GroupBox(position, name);
36 T = new DoubleSpinBox(reglages_groupbox->NewRow(), "period, 0 for auto", " s",
37 0, 10, 0.01);
38 cutoff = new DoubleSpinBox(reglages_groupbox->NewRow(), "cutoff frequency",
39 " Hz", 0, 10000, 0.1, 2, 1);
40
41 cvmatrix_descriptor *desc = new cvmatrix_descriptor(1, 1);
42 desc->SetElementName(0, 0, "output");
43 output = new cvmatrix(self, desc, floatType, name);
44
45 output->SetValue(0, 0, 0);
46
47 f = new PoleFilter(order);
48
49 if (T->Value() != 0)
50 f->setup(1. / T->Value(), cutoff->Value());
51 f->reset();
52
53 first_update = true;
54}
55
56ButterworthLowPass_impl::~ButterworthLowPass_impl() { delete f; }
57
58void ButterworthLowPass_impl::UpdateFrom(const io_data *data) {
59 float result;
60 cvmatrix *input = (cvmatrix *)data;
61
62 if (T->ValueChanged() || cutoff->ValueChanged()) {
63 if (T->Value() != 0) {
64 f->setup(1. / T->Value(), cutoff->Value());
65 } else {
66 first_update = true;
67 }
68 }
69
70 // on prend une fois pour toute les mutex et on fait des accès directs
71 output->GetMutex();
72 input->GetMutex();
73
74 if (T->Value() == 0) {
75 float delta_t = (float)(data->DataTime() - previous_time) / 1000000000.;
76 f->setup(1. / delta_t, cutoff->Value());
77 }
78
79 if (first_update == true) {
80 first_update = false;
81 } else {
82 result = f->filter(input->ValueNoMutex(0, 0));
83 output->SetValueNoMutex(0, 0, result);
84 }
85
86 input->ReleaseMutex();
87 output->ReleaseMutex();
88
89 output->SetDataTime(data->DataTime());
90 previous_time = data->DataTime();
91}
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