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https://github.com/f4exb/sdrangel.git
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100 lines
3.2 KiB
C++
100 lines
3.2 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2020 Jon Beniston, M7RCE //
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// //
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// This program is free software; you can redistribute it and/or modify //
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation as version 3 of the License, or //
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// (at your option) any later version. //
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// //
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// This program is distributed in the hope that it will be useful, //
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// but WITHOUT ANY WARRANTY; without even the implied warranty of //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
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// GNU General Public License V3 for more details. //
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// //
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// You should have received a copy of the GNU General Public License //
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// along with this program. If not, see <http://www.gnu.org/licenses/>. //
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///////////////////////////////////////////////////////////////////////////////////
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#include <cmath>
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#include "fmpreemphasisdialog.h"
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#include "ui_fmpreemphasisdialog.h"
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// Convert from s to us
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#define TAU_SCALE 1000000.0
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FMPreemphasisDialog::FMPreemphasisDialog(float tau, float highFreq, QWidget* parent) :
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QDialog(parent),
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ui(new Ui::FMPreemphasisDialog)
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{
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ui->setupUi(this);
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ui->tau->setValue(tau*TAU_SCALE);
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ui->lowFreq->setValue(1.0/(2.0*M_PI*tau));
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ui->highFreq->setValue(highFreq);
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}
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FMPreemphasisDialog::~FMPreemphasisDialog()
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{
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delete ui;
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}
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void FMPreemphasisDialog::accept()
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{
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m_tau = ui->tau->value()/TAU_SCALE;
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m_highFreq = ui->highFreq->value();
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QDialog::accept();
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}
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void FMPreemphasisDialog::on_tau_valueChanged(double value)
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{
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// Set corresponding low frequency
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ui->lowFreq->blockSignals(true);
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ui->lowFreq->setValue(1.0/(2.0*M_PI*(value/TAU_SCALE)));
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updateCombo();
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ui->lowFreq->blockSignals(false);
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}
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void FMPreemphasisDialog::on_lowFreq_valueChanged(double value)
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{
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// Set corresponding tau
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ui->tau->blockSignals(true);
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ui->tau->setValue(TAU_SCALE*1.0/(2.0*M_PI*value));
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updateCombo();
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ui->tau->blockSignals(false);
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}
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void FMPreemphasisDialog::updateCombo()
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{
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double value = ui->tau->value();
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if (value == 531.0)
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ui->preset->setCurrentIndex(0);
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else if (value == 75.0)
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ui->preset->setCurrentIndex(1);
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else if (value == 50.0)
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ui->preset->setCurrentIndex(2);
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else
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ui->preset->setCurrentIndex(3);
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}
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void FMPreemphasisDialog::on_preset_currentIndexChanged(int value)
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{
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if (value == 0)
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{
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// Narrowband FM
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ui->lowFreq->setValue(300.0);
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ui->highFreq->setValue(3000.0);
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}
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else if (value == 1)
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{
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// Broadcast FM (US)
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ui->tau->setValue(75.0);
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ui->highFreq->setValue(12000.0);
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}
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else if (value == 2)
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{
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// Broadcast FM (EU)
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ui->tau->setValue(50.0);
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ui->highFreq->setValue(12000.0);
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}
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}
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