source: flair-src/trunk/lib/FlairFilter/src/ButterworthLowPass_impl.cpp@ 10

Last change on this file since 10 was 10, checked in by Sanahuja Guillaume, 7 years ago

lic

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,const LayoutPosition* position,string name,int order)
32{
33 //init UI
34 GroupBox* reglages_groupbox=new GroupBox(position,name);
35 T=new DoubleSpinBox(reglages_groupbox->NewRow(),"period, 0 for auto"," s",0,10,0.01);
36 cutoff=new DoubleSpinBox(reglages_groupbox->NewRow(),"cutoff frequency"," Hz",0,10000,0.1,2,1);
37
38 cvmatrix_descriptor* desc=new cvmatrix_descriptor(1,1);
39 desc->SetElementName(0,0,"output");
40 output=new cvmatrix(self,desc,floatType,name);
41
42 output->SetValue(0,0,0);
43
44 f= new PoleFilter(order);
45
46 if(T->Value()!=0) f->setup(1./T->Value(), cutoff->Value());
47 f->reset();
48
49 first_update=true;
50}
51
52ButterworthLowPass_impl::~ButterworthLowPass_impl()
53{
54 delete f;
55}
56
57void ButterworthLowPass_impl::UpdateFrom(const io_data *data)
58{
59 float result;
60 cvmatrix *input=(cvmatrix*)data;
61
62 if(T->ValueChanged() || cutoff->ValueChanged())
63 {
64 if(T->Value()!=0)
65 {
66 f->setup (1./T->Value(), cutoff->Value());
67 }
68 else
69 {
70 first_update=true;
71 }
72 }
73
74 //on prend une fois pour toute les mutex et on fait des accès directs
75 output->GetMutex();
76 input->GetMutex();
77
78 if(T->Value()==0)
79 {
80 float delta_t=(float)(data->DataTime()-previous_time)/1000000000.;
81 f->setup (1./delta_t, cutoff->Value());
82 }
83
84 if(first_update==true)
85 {
86 first_update=false;
87 }
88 else
89 {
90 result = f->filter(input->ValueNoMutex(0,0));
91 output->SetValueNoMutex(0,0,result);
92 }
93
94 input->ReleaseMutex();
95 output->ReleaseMutex();
96
97 output->SetDataTime(data->DataTime());
98 previous_time=data->DataTime();
99}
100
Note: See TracBrowser for help on using the repository browser.