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