mirror of
https://github.com/f4exb/sdrangel.git
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638 lines
22 KiB
C++
638 lines
22 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2012 maintech GmbH, Otto-Hahn-Str. 15, 97204 Hoechberg, Germany //
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// written by Christian Daniel //
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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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// //
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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 <QTime>
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#include <QDebug>
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#include <stdio.h>
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#include <complex.h>
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#include "SWGChannelSettings.h"
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#include "SWGNFMDemodSettings.h"
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#include "dsp/downchannelizer.h"
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#include "util/stepfunctions.h"
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#include "audio/audiooutput.h"
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#include "dsp/dspengine.h"
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#include "dsp/threadedbasebandsamplesink.h"
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#include "dsp/dspcommands.h"
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#include "device/devicesourceapi.h"
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#include "audio/audionetsink.h"
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#include "nfmdemodgui.h"
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#include "nfmdemod.h"
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MESSAGE_CLASS_DEFINITION(NFMDemod::MsgConfigureNFMDemod, Message)
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MESSAGE_CLASS_DEFINITION(NFMDemod::MsgConfigureChannelizer, Message)
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MESSAGE_CLASS_DEFINITION(NFMDemod::MsgReportCTCSSFreq, Message)
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const QString NFMDemod::m_channelIdURI = "de.maintech.sdrangelove.channel.nfm";
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const QString NFMDemod::m_channelId = "NFMDemod";
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static const double afSqTones[2] = {1000.0, 6000.0}; // {1200.0, 8000.0};
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const int NFMDemod::m_udpBlockSize = 512;
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NFMDemod::NFMDemod(DeviceSourceAPI *devieAPI) :
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ChannelSinkAPI(m_channelIdURI),
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m_deviceAPI(devieAPI),
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m_inputSampleRate(48000),
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m_inputFrequencyOffset(0),
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m_ctcssIndex(0),
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m_sampleCount(0),
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m_squelchCount(0),
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m_squelchGate(2),
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m_audioMute(false),
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m_squelchLevel(-990),
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m_squelchOpen(false),
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m_afSquelchOpen(false),
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m_magsq(0.0f),
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m_magsqSum(0.0f),
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m_magsqPeak(0.0f),
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m_magsqCount(0),
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m_afSquelch(2, afSqTones),
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m_fmExcursion(2400),
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m_audioFifo(48000),
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m_settingsMutex(QMutex::Recursive)
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{
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setObjectName(m_channelId);
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m_audioBuffer.resize(1<<14);
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m_audioBufferFill = 0;
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m_agcLevel = 1.0;
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m_ctcssDetector.setCoefficients(3000, 6000.0); // 0.5s / 2 Hz resolution
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m_afSquelch.setCoefficients(24, 600, 48000.0, 200, 0); // 0.5ms test period, 300ms average span, 48kS/s SR, 100ms attack, no decay
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DSPEngine::instance()->addAudioSink(&m_audioFifo);
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m_audioNetSink = new AudioNetSink(this);
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m_audioNetSink->setDestination(m_settings.m_udpAddress, m_settings.m_udpPort);
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if (m_audioNetSink->selectType(AudioNetSink::SinkRTP)) {
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qDebug("NFMDemod::NFMDemod: set audio sink to RTP mode");
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} else {
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qWarning("NFMDemod::NFMDemod: RTP support for audio sink not available. Fall back too UDP");
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}
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m_channelizer = new DownChannelizer(this);
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m_threadedChannelizer = new ThreadedBasebandSampleSink(m_channelizer, this);
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m_deviceAPI->addThreadedSink(m_threadedChannelizer);
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m_deviceAPI->addChannelAPI(this);
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applyChannelSettings(m_inputSampleRate, m_inputFrequencyOffset, true);
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applySettings(m_settings, true);
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}
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NFMDemod::~NFMDemod()
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{
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DSPEngine::instance()->removeAudioSink(&m_audioFifo);
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delete m_audioNetSink;
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m_deviceAPI->removeChannelAPI(this);
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m_deviceAPI->removeThreadedSink(m_threadedChannelizer);
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delete m_threadedChannelizer;
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delete m_channelizer;
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}
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float arctan2(Real y, Real x)
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{
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Real coeff_1 = M_PI / 4;
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Real coeff_2 = 3 * coeff_1;
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Real abs_y = fabs(y) + 1e-10; // kludge to prevent 0/0 condition
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Real angle;
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if( x>= 0) {
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Real r = (x - abs_y) / (x + abs_y);
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angle = coeff_1 - coeff_1 * r;
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} else {
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Real r = (x + abs_y) / (abs_y - x);
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angle = coeff_2 - coeff_1 * r;
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}
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if(y < 0) {
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return(-angle);
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} else {
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return(angle);
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}
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}
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Real angleDist(Real a, Real b)
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{
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Real dist = b - a;
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while(dist <= M_PI)
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dist += 2 * M_PI;
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while(dist >= M_PI)
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dist -= 2 * M_PI;
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return dist;
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}
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void NFMDemod::feed(const SampleVector::const_iterator& begin, const SampleVector::const_iterator& end, bool firstOfBurst __attribute__((unused)))
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{
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Complex ci;
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m_settingsMutex.lock();
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for (SampleVector::const_iterator it = begin; it != end; ++it)
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{
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Complex c(it->real(), it->imag());
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c *= m_nco.nextIQ();
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if (m_interpolator.decimate(&m_interpolatorDistanceRemain, c, &ci))
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{
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qint16 sample;
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double magsqRaw; // = ci.real()*ci.real() + c.imag()*c.imag();
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Real deviation;
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Real demod = m_phaseDiscri.phaseDiscriminatorDelta(ci, magsqRaw, deviation);
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Real magsq = magsqRaw / (SDR_RX_SCALED*SDR_RX_SCALED);
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m_movingAverage(magsq);
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m_magsqSum += magsq;
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if (magsq > m_magsqPeak)
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{
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m_magsqPeak = magsq;
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}
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m_magsqCount++;
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m_sampleCount++;
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// AF processing
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if (m_settings.m_deltaSquelch)
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{
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if (m_afSquelch.analyze(demod)) {
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m_afSquelchOpen = m_afSquelch.evaluate() ? m_squelchGate + 480 : 0;
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}
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if (m_afSquelchOpen)
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{
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if (m_squelchCount < m_squelchGate + 480)
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{
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m_squelchCount++;
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}
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}
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else
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{
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if (m_squelchCount > 0)
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{
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m_squelchCount--;
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}
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}
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}
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else
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{
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if ((Real) m_movingAverage < m_squelchLevel)
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{
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if (m_squelchCount > 0)
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{
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m_squelchCount--;
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}
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}
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else
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{
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if (m_squelchCount < m_squelchGate + 480)
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{
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m_squelchCount++;
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}
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}
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}
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m_squelchOpen = (m_squelchCount > m_squelchGate);
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if ((m_squelchOpen) && !m_settings.m_audioMute)
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{
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if (m_settings.m_ctcssOn)
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{
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Real ctcss_sample = m_lowpass.filter(demod);
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if ((m_sampleCount & 7) == 7) // decimate 48k -> 6k
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{
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if (m_ctcssDetector.analyze(&ctcss_sample))
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{
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int maxToneIndex;
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if (m_ctcssDetector.getDetectedTone(maxToneIndex))
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{
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if (maxToneIndex+1 != m_ctcssIndex)
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{
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if (getMessageQueueToGUI()) {
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MsgReportCTCSSFreq *msg = MsgReportCTCSSFreq::create(m_ctcssDetector.getToneSet()[maxToneIndex]);
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getMessageQueueToGUI()->push(msg);
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}
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m_ctcssIndex = maxToneIndex+1;
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}
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}
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else
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{
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if (m_ctcssIndex != 0)
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{
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if (getMessageQueueToGUI()) {
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MsgReportCTCSSFreq *msg = MsgReportCTCSSFreq::create(0);
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getMessageQueueToGUI()->push(msg);
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}
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m_ctcssIndex = 0;
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}
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}
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}
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}
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}
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if (m_settings.m_ctcssOn && m_ctcssIndexSelected && (m_ctcssIndexSelected != m_ctcssIndex))
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{
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sample = 0;
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if (m_settings.m_copyAudioToUDP) {
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m_audioNetSink->write(0);
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}
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}
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else
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{
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demod = m_bandpass.filter(demod);
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Real squelchFactor = StepFunctions::smootherstep((Real) (m_squelchCount - m_squelchGate) / 480.0f);
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sample = demod * m_settings.m_volume * squelchFactor;
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if (m_settings.m_copyAudioToUDP) {
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m_audioNetSink->write(demod * 5.0f * squelchFactor);
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}
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}
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}
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else
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{
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if (m_ctcssIndex != 0)
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{
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if (getMessageQueueToGUI()) {
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MsgReportCTCSSFreq *msg = MsgReportCTCSSFreq::create(0);
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getMessageQueueToGUI()->push(msg);
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}
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m_ctcssIndex = 0;
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}
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sample = 0;
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if (m_settings.m_copyAudioToUDP) {
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m_audioNetSink->write(0);
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}
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}
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m_audioBuffer[m_audioBufferFill].l = sample;
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m_audioBuffer[m_audioBufferFill].r = sample;
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++m_audioBufferFill;
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if (m_audioBufferFill >= m_audioBuffer.size())
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{
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uint res = m_audioFifo.write((const quint8*)&m_audioBuffer[0], m_audioBufferFill, 10);
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if (res != m_audioBufferFill)
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{
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qDebug("NFMDemod::feed: %u/%u audio samples written", res, m_audioBufferFill);
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}
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m_audioBufferFill = 0;
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}
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m_interpolatorDistanceRemain += m_interpolatorDistance;
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}
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}
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if (m_audioBufferFill > 0)
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{
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uint res = m_audioFifo.write((const quint8*)&m_audioBuffer[0], m_audioBufferFill, 10);
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if (res != m_audioBufferFill)
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{
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qDebug("NFMDemod::feed: %u/%u tail samples written", res, m_audioBufferFill);
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}
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m_audioBufferFill = 0;
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}
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m_settingsMutex.unlock();
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}
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void NFMDemod::start()
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{
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qDebug() << "NFMDemod::start";
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m_squelchCount = 0;
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m_audioFifo.clear();
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m_phaseDiscri.reset();
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applyChannelSettings(m_inputSampleRate, m_inputFrequencyOffset, true);
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}
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void NFMDemod::stop()
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{
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}
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bool NFMDemod::handleMessage(const Message& cmd)
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{
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if (DownChannelizer::MsgChannelizerNotification::match(cmd))
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{
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DownChannelizer::MsgChannelizerNotification& notif = (DownChannelizer::MsgChannelizerNotification&) cmd;
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qDebug() << "NFMDemod::handleMessage: DownChannelizer::MsgChannelizerNotification";
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applyChannelSettings(notif.getSampleRate(), notif.getFrequencyOffset());
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return true;
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}
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else if (MsgConfigureChannelizer::match(cmd))
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{
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MsgConfigureChannelizer& cfg = (MsgConfigureChannelizer&) cmd;
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qDebug() << "NFMDemod::handleMessage: MsgConfigureChannelizer:"
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<< " sampleRate: " << cfg.getSampleRate()
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<< " centerFrequency: " << cfg.getCenterFrequency();
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m_channelizer->configure(m_channelizer->getInputMessageQueue(),
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cfg.getSampleRate(),
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cfg.getCenterFrequency());
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return true;
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}
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else if (MsgConfigureNFMDemod::match(cmd))
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{
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MsgConfigureNFMDemod& cfg = (MsgConfigureNFMDemod&) cmd;
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qDebug() << "NFMDemod::handleMessage: MsgConfigureNFMDemod";
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applySettings(cfg.getSettings(), cfg.getForce());
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return true;
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}
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else if (DSPSignalNotification::match(cmd))
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{
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return true;
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}
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else
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{
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return false;
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}
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}
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void NFMDemod::applyChannelSettings(int inputSampleRate, int inputFrequencyOffset, bool force)
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{
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qDebug() << "NFMDemod::applyChannelSettings:"
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<< " inputSampleRate: " << inputSampleRate
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<< " inputFrequencyOffset: " << inputFrequencyOffset;
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if ((inputFrequencyOffset != m_inputFrequencyOffset) ||
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(inputSampleRate != m_inputSampleRate) || force)
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{
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m_nco.setFreq(-inputFrequencyOffset, inputSampleRate);
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}
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if ((inputSampleRate != m_inputSampleRate) || force)
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{
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m_settingsMutex.lock();
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m_interpolator.create(16, inputSampleRate, m_settings.m_rfBandwidth / 2.2);
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m_interpolatorDistanceRemain = 0;
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m_interpolatorDistance = (Real) inputSampleRate / (Real) m_settings.m_audioSampleRate;
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m_settingsMutex.unlock();
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}
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m_inputSampleRate = inputSampleRate;
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m_inputFrequencyOffset = inputFrequencyOffset;
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}
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void NFMDemod::applySettings(const NFMDemodSettings& settings, bool force)
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{
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qDebug() << "NFMDemod::applySettings:"
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<< " m_inputFrequencyOffset: " << settings.m_inputFrequencyOffset
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<< " m_rfBandwidth: " << settings.m_rfBandwidth
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<< " m_afBandwidth: " << settings.m_afBandwidth
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<< " m_fmDeviation: " << settings.m_fmDeviation
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<< " m_volume: " << settings.m_volume
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<< " m_squelchGate: " << settings.m_squelchGate
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<< " m_deltaSquelch: " << settings.m_deltaSquelch
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<< " m_squelch: " << settings.m_squelch
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<< " m_ctcssIndex: " << settings.m_ctcssIndex
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<< " m_ctcssOn: " << settings.m_ctcssOn
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<< " m_audioMute: " << settings.m_audioMute
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<< " m_copyAudioToUDP: " << settings.m_copyAudioToUDP
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<< " m_udpAddress: " << settings.m_udpAddress
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<< " m_udpPort: " << settings.m_udpPort
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<< " force: " << force;
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if ((settings.m_rfBandwidth != m_settings.m_rfBandwidth) ||
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(settings.m_audioSampleRate != m_settings.m_audioSampleRate) || force)
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{
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m_settingsMutex.lock();
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m_interpolator.create(16, m_inputSampleRate, settings.m_rfBandwidth / 2.2);
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m_interpolatorDistanceRemain = 0;
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m_interpolatorDistance = (Real) m_inputSampleRate / (Real) settings.m_audioSampleRate;
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m_settingsMutex.unlock();
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}
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if ((settings.m_fmDeviation != m_settings.m_fmDeviation) ||
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(settings.m_rfBandwidth != m_settings.m_rfBandwidth) || force)
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{
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m_phaseDiscri.setFMScaling((8.0f*settings.m_rfBandwidth) / static_cast<float>(settings.m_fmDeviation)); // integrate 4x factor
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}
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if ((settings.m_afBandwidth != m_settings.m_afBandwidth) ||
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(settings.m_audioSampleRate != m_settings.m_audioSampleRate) || force)
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{
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m_settingsMutex.lock();
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m_lowpass.create(301, settings.m_audioSampleRate, 250.0);
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m_bandpass.create(301, settings.m_audioSampleRate, 300.0, settings.m_afBandwidth);
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m_settingsMutex.unlock();
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}
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if ((settings.m_squelchGate != m_settings.m_squelchGate) || force)
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{
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m_squelchGate = 480 * settings.m_squelchGate; // gate is given in 10s of ms at 48000 Hz audio sample rate
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m_squelchCount = 0; // reset squelch open counter
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}
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if ((settings.m_squelch != m_settings.m_squelch) ||
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(settings.m_deltaSquelch != m_settings.m_deltaSquelch) || force)
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{
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if (settings.m_deltaSquelch)
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{ // input is a value in negative millis
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m_squelchLevel = (- settings.m_squelch) / 1000.0;
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m_afSquelch.setThreshold(m_squelchLevel);
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m_afSquelch.reset();
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}
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else
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{ // input is a value in centi-Bels
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m_squelchLevel = std::pow(10.0, settings.m_squelch / 100.0);
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m_movingAverage.reset();
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}
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m_squelchCount = 0; // reset squelch open counter
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}
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if ((settings.m_udpAddress != m_settings.m_udpAddress)
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|| (settings.m_udpPort != m_settings.m_udpPort) || force)
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{
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m_audioNetSink->setDestination(settings.m_udpAddress, settings.m_udpPort);
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}
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if ((settings.m_ctcssIndex != m_settings.m_ctcssIndex) || force)
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{
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setSelectedCtcssIndex(settings.m_ctcssIndex);
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}
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m_settings = settings;
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}
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QByteArray NFMDemod::serialize() const
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{
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return m_settings.serialize();
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}
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bool NFMDemod::deserialize(const QByteArray& data)
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{
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bool success = true;
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if (!m_settings.deserialize(data))
|
|
{
|
|
m_settings.resetToDefaults();
|
|
success = false;
|
|
}
|
|
|
|
NFMDemod::MsgConfigureChannelizer* channelConfigMsg = NFMDemod::MsgConfigureChannelizer::create(
|
|
48000, m_settings.m_inputFrequencyOffset);
|
|
m_inputMessageQueue.push(channelConfigMsg);
|
|
|
|
MsgConfigureNFMDemod *msg = MsgConfigureNFMDemod::create(m_settings, true);
|
|
m_inputMessageQueue.push(msg);
|
|
|
|
return success;
|
|
}
|
|
|
|
int NFMDemod::webapiSettingsGet(
|
|
SWGSDRangel::SWGChannelSettings& response,
|
|
QString& errorMessage __attribute__((unused)))
|
|
{
|
|
response.setNfmDemodSettings(new SWGSDRangel::SWGNFMDemodSettings());
|
|
webapiFormatChannelSettings(response, m_settings);
|
|
return 200;
|
|
}
|
|
|
|
int NFMDemod::webapiSettingsPutPatch(
|
|
bool force,
|
|
const QStringList& channelSettingsKeys,
|
|
SWGSDRangel::SWGChannelSettings& response,
|
|
QString& errorMessage __attribute__((unused)))
|
|
{
|
|
NFMDemodSettings settings = m_settings;
|
|
bool frequencyOffsetChanged = false;
|
|
|
|
if (channelSettingsKeys.contains("afBandwidth")) {
|
|
settings.m_afBandwidth = response.getNfmDemodSettings()->getAfBandwidth();
|
|
}
|
|
if (channelSettingsKeys.contains("audioMute")) {
|
|
settings.m_audioMute = response.getNfmDemodSettings()->getAudioMute() != 0;
|
|
}
|
|
if (channelSettingsKeys.contains("audioSampleRate")) {
|
|
settings.m_audioSampleRate = response.getNfmDemodSettings()->getAudioSampleRate();
|
|
}
|
|
if (channelSettingsKeys.contains("copyAudioToUDP")) {
|
|
settings.m_copyAudioToUDP = response.getNfmDemodSettings()->getCopyAudioToUdp() != 0;
|
|
}
|
|
if (channelSettingsKeys.contains("ctcssIndex")) {
|
|
settings.m_ctcssIndex = response.getNfmDemodSettings()->getCtcssIndex();
|
|
}
|
|
if (channelSettingsKeys.contains("ctcssOn")) {
|
|
settings.m_ctcssOn = response.getNfmDemodSettings()->getCtcssOn() != 0;
|
|
}
|
|
if (channelSettingsKeys.contains("deltaSquelch")) {
|
|
settings.m_deltaSquelch = response.getNfmDemodSettings()->getDeltaSquelch() != 0;
|
|
}
|
|
if (channelSettingsKeys.contains("fmDeviation")) {
|
|
settings.m_fmDeviation = response.getNfmDemodSettings()->getFmDeviation();
|
|
}
|
|
if (channelSettingsKeys.contains("inputFrequencyOffset"))
|
|
{
|
|
settings.m_inputFrequencyOffset = response.getNfmDemodSettings()->getInputFrequencyOffset();
|
|
frequencyOffsetChanged = true;
|
|
}
|
|
if (channelSettingsKeys.contains("rfBandwidth")) {
|
|
settings.m_rfBandwidth = response.getNfmDemodSettings()->getRfBandwidth();
|
|
}
|
|
if (channelSettingsKeys.contains("rgbColor")) {
|
|
settings.m_rgbColor = response.getNfmDemodSettings()->getRgbColor();
|
|
}
|
|
if (channelSettingsKeys.contains("squelch")) {
|
|
settings.m_squelch = response.getNfmDemodSettings()->getSquelch();
|
|
}
|
|
if (channelSettingsKeys.contains("squelchGate")) {
|
|
settings.m_squelchGate = response.getNfmDemodSettings()->getSquelchGate();
|
|
}
|
|
if (channelSettingsKeys.contains("title")) {
|
|
settings.m_title = *response.getNfmDemodSettings()->getTitle();
|
|
}
|
|
if (channelSettingsKeys.contains("udpAddress")) {
|
|
settings.m_udpAddress = *response.getNfmDemodSettings()->getUdpAddress();
|
|
}
|
|
if (channelSettingsKeys.contains("udpPort")) {
|
|
settings.m_udpPort = response.getNfmDemodSettings()->getUdpPort();
|
|
}
|
|
if (channelSettingsKeys.contains("volume")) {
|
|
settings.m_volume = response.getNfmDemodSettings()->getVolume();
|
|
}
|
|
|
|
if (frequencyOffsetChanged)
|
|
{
|
|
MsgConfigureChannelizer* channelConfigMsg = MsgConfigureChannelizer::create(
|
|
48000, settings.m_inputFrequencyOffset);
|
|
m_inputMessageQueue.push(channelConfigMsg);
|
|
}
|
|
|
|
MsgConfigureNFMDemod *msg = MsgConfigureNFMDemod::create(settings, force);
|
|
m_inputMessageQueue.push(msg);
|
|
|
|
if (m_guiMessageQueue) // forward to GUI if any
|
|
{
|
|
MsgConfigureNFMDemod *msgToGUI = MsgConfigureNFMDemod::create(settings, force);
|
|
m_guiMessageQueue->push(msgToGUI);
|
|
}
|
|
|
|
webapiFormatChannelSettings(response, settings);
|
|
|
|
return 200;
|
|
}
|
|
|
|
void NFMDemod::webapiFormatChannelSettings(SWGSDRangel::SWGChannelSettings& response, const NFMDemodSettings& settings)
|
|
{
|
|
response.getNfmDemodSettings()->setAfBandwidth(settings.m_afBandwidth);
|
|
response.getNfmDemodSettings()->setAudioMute(settings.m_audioMute ? 1 : 0);
|
|
response.getNfmDemodSettings()->setAudioSampleRate(settings.m_audioSampleRate);
|
|
response.getNfmDemodSettings()->setCopyAudioToUdp(settings.m_copyAudioToUDP ? 1 : 0);
|
|
response.getNfmDemodSettings()->setCtcssIndex(settings.m_ctcssIndex);
|
|
response.getNfmDemodSettings()->setCtcssOn(settings.m_ctcssOn ? 1 : 0);
|
|
response.getNfmDemodSettings()->setDeltaSquelch(settings.m_deltaSquelch ? 1 : 0);
|
|
response.getNfmDemodSettings()->setFmDeviation(settings.m_fmDeviation);
|
|
response.getNfmDemodSettings()->setInputFrequencyOffset(settings.m_inputFrequencyOffset);
|
|
response.getNfmDemodSettings()->setRfBandwidth(settings.m_rfBandwidth);
|
|
response.getNfmDemodSettings()->setRgbColor(settings.m_rgbColor);
|
|
response.getNfmDemodSettings()->setSquelch(settings.m_squelch);
|
|
response.getNfmDemodSettings()->setSquelchGate(settings.m_squelchGate);
|
|
response.getNfmDemodSettings()->setUdpPort(settings.m_udpPort);
|
|
response.getNfmDemodSettings()->setVolume(settings.m_volume);
|
|
|
|
if (response.getNfmDemodSettings()->getTitle()) {
|
|
*response.getNfmDemodSettings()->getTitle() = settings.m_title;
|
|
} else {
|
|
response.getNfmDemodSettings()->setTitle(new QString(settings.m_title));
|
|
}
|
|
|
|
if (response.getNfmDemodSettings()->getUdpAddress()) {
|
|
*response.getNfmDemodSettings()->getUdpAddress() = settings.m_udpAddress;
|
|
} else {
|
|
response.getNfmDemodSettings()->setUdpAddress(new QString(settings.m_udpAddress));
|
|
}
|
|
}
|
|
|