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522 lines
18 KiB
C++
522 lines
18 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2016 F4EXB //
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// written by Edouard Griffiths //
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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 "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/downchannelizer.h"
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#include "dsp/dspcommands.h"
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#include "device/devicesourceapi.h"
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#include "dsddemod.h"
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MESSAGE_CLASS_DEFINITION(DSDDemod::MsgConfigureChannelizer, Message)
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MESSAGE_CLASS_DEFINITION(DSDDemod::MsgConfigureDSDDemod, Message)
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MESSAGE_CLASS_DEFINITION(DSDDemod::MsgConfigureMyPosition, Message)
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const QString DSDDemod::m_channelIdURI = "sdrangel.channel.dsddemod";
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const QString DSDDemod::m_channelId = "DSDDemod";
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const int DSDDemod::m_udpBlockSize = 512;
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DSDDemod::DSDDemod(DeviceSourceAPI *deviceAPI) :
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ChannelSinkAPI(m_channelIdURI),
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m_deviceAPI(deviceAPI),
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m_inputSampleRate(48000),
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m_inputFrequencyOffset(0),
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m_interpolatorDistance(0.0f),
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m_interpolatorDistanceRemain(0.0f),
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m_sampleCount(0),
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m_squelchCount(0),
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m_squelchGate(0),
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m_squelchLevel(1e-4),
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m_squelchOpen(false),
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m_fmExcursion(24),
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m_audioFifo1(48000),
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m_audioFifo2(48000),
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m_scope(0),
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m_scopeEnabled(true),
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m_dsdDecoder(),
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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_sampleBuffer = new FixReal[1<<17]; // 128 kS
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m_sampleBufferIndex = 0;
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m_scaleFromShort = SDR_RX_SAMP_SZ < sizeof(short)*8 ? 1 : 1<<(SDR_RX_SAMP_SZ - sizeof(short)*8);
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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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DSPEngine::instance()->addAudioSink(&m_audioFifo1);
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DSPEngine::instance()->addAudioSink(&m_audioFifo2);
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m_udpBufferAudio = new UDPSink<AudioSample>(this, m_udpBlockSize, m_settings.m_udpPort);
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m_audioFifo1.setUDPSink(m_udpBufferAudio);
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m_audioFifo2.setUDPSink(m_udpBufferAudio);
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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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DSDDemod::~DSDDemod()
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{
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delete[] m_sampleBuffer;
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DSPEngine::instance()->removeAudioSink(&m_audioFifo1);
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DSPEngine::instance()->removeAudioSink(&m_audioFifo2);
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delete m_udpBufferAudio;
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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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void DSDDemod::configureMyPosition(MessageQueue* messageQueue, float myLatitude, float myLongitude)
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{
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Message* cmd = MsgConfigureMyPosition::create(myLatitude, myLongitude);
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messageQueue->push(cmd);
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}
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void DSDDemod::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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int samplesPerSymbol = m_dsdDecoder.getSamplesPerSymbol();
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m_settingsMutex.lock();
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m_scopeSampleBuffer.clear();
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m_dsdDecoder.enableMbelib(!DSPEngine::instance()->hasDVSerialSupport()); // disable mbelib if DV serial support is present and activated else enable it
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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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FixReal sample, delayedSample;
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qint16 sampleDSD;
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Real re = ci.real() / SDR_RX_SCALED;
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Real im = ci.imag() / SDR_RX_SCALED;
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Real magsq = re*re + im*im;
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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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Real demod = m_phaseDiscri.phaseDiscriminator(ci) * m_settings.m_demodGain; // [-1.0:1.0]
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m_sampleCount++;
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// AF processing
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if (m_movingAverage.asDouble() > m_squelchLevel)
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{
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if (m_squelchGate > 0)
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{
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if (m_squelchCount < m_squelchGate) {
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m_squelchCount++;
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}
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m_squelchOpen = m_squelchCount == m_squelchGate;
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}
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else
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{
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m_squelchOpen = true;
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}
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}
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else
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{
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m_squelchCount = 0;
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m_squelchOpen = false;
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}
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if (m_squelchOpen)
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{
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sampleDSD = demod * 32768.0f; // DSD decoder takes int16 samples
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sample = demod * SDR_RX_SCALEF; // scale to sample size
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}
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else
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{
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sampleDSD = 0;
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sample = 0;
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}
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m_dsdDecoder.pushSample(sampleDSD);
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if (m_settings.m_enableCosineFiltering) { // show actual input to FSK demod
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sample = m_dsdDecoder.getFilteredSample() * m_scaleFromShort;
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}
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if (m_sampleBufferIndex < (1<<17)-1) {
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m_sampleBufferIndex++;
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} else {
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m_sampleBufferIndex = 0;
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}
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m_sampleBuffer[m_sampleBufferIndex] = sample;
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if (m_sampleBufferIndex < samplesPerSymbol) {
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delayedSample = m_sampleBuffer[(1<<17) - samplesPerSymbol + m_sampleBufferIndex]; // wrap
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} else {
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delayedSample = m_sampleBuffer[m_sampleBufferIndex - samplesPerSymbol];
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}
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if (m_settings.m_syncOrConstellation)
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{
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Sample s(sample, m_dsdDecoder.getSymbolSyncSample() * m_scaleFromShort);
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m_scopeSampleBuffer.push_back(s);
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}
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else
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{
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Sample s(sample, delayedSample); // I=signal, Q=signal delayed by 20 samples (2400 baud: lowest rate)
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m_scopeSampleBuffer.push_back(s);
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}
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if (DSPEngine::instance()->hasDVSerialSupport())
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{
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if ((m_settings.m_slot1On) && m_dsdDecoder.mbeDVReady1())
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{
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if (!m_settings.m_audioMute)
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{
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DSPEngine::instance()->pushMbeFrame(
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m_dsdDecoder.getMbeDVFrame1(),
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m_dsdDecoder.getMbeRateIndex(),
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m_settings.m_volume * 10.0,
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m_settings.m_tdmaStereo ? 1 : 3, // left or both channels
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m_settings.m_highPassFilter,
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&m_audioFifo1);
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}
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m_dsdDecoder.resetMbeDV1();
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}
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if ((m_settings.m_slot2On) && m_dsdDecoder.mbeDVReady2())
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{
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if (!m_settings.m_audioMute)
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{
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DSPEngine::instance()->pushMbeFrame(
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m_dsdDecoder.getMbeDVFrame2(),
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m_dsdDecoder.getMbeRateIndex(),
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m_settings.m_volume * 10.0,
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m_settings.m_tdmaStereo ? 2 : 3, // right or both channels
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m_settings.m_highPassFilter,
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&m_audioFifo2);
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}
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m_dsdDecoder.resetMbeDV2();
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}
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}
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// if (DSPEngine::instance()->hasDVSerialSupport() && m_dsdDecoder.mbeDVReady1())
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// {
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// if (!m_settings.m_audioMute)
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// {
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// DSPEngine::instance()->pushMbeFrame(m_dsdDecoder.getMbeDVFrame1(), m_dsdDecoder.getMbeRateIndex(), m_settings.m_volume, &m_audioFifo1);
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// }
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//
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// m_dsdDecoder.resetMbeDV1();
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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 (!DSPEngine::instance()->hasDVSerialSupport())
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{
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if (m_settings.m_slot1On)
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{
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int nbAudioSamples;
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short *dsdAudio = m_dsdDecoder.getAudio1(nbAudioSamples);
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if (nbAudioSamples > 0)
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{
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if (!m_settings.m_audioMute) {
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m_audioFifo1.write((const quint8*) dsdAudio, nbAudioSamples, 10);
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}
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m_dsdDecoder.resetAudio1();
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}
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}
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if (m_settings.m_slot2On)
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{
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int nbAudioSamples;
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short *dsdAudio = m_dsdDecoder.getAudio2(nbAudioSamples);
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if (nbAudioSamples > 0)
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{
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if (!m_settings.m_audioMute) {
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m_audioFifo2.write((const quint8*) dsdAudio, nbAudioSamples, 10);
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}
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m_dsdDecoder.resetAudio2();
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}
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}
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// int nbAudioSamples;
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// short *dsdAudio = m_dsdDecoder.getAudio1(nbAudioSamples);
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//
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// if (nbAudioSamples > 0)
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// {
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// if (!m_settings.m_audioMute) {
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// uint res = m_audioFifo1.write((const quint8*) dsdAudio, nbAudioSamples, 10);
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// }
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//
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// m_dsdDecoder.resetAudio1();
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// }
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}
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if ((m_scope != 0) && (m_scopeEnabled))
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{
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m_scope->feed(m_scopeSampleBuffer.begin(), m_scopeSampleBuffer.end(), true); // true = real samples for what it's worth
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}
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m_settingsMutex.unlock();
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}
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void DSDDemod::start()
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{
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m_audioFifo1.clear();
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m_audioFifo2.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 DSDDemod::stop()
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{
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}
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bool DSDDemod::handleMessage(const Message& cmd)
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{
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qDebug() << "DSDDemod::handleMessage";
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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() << "DSDDemod::handleMessage: MsgChannelizerNotification: inputSampleRate: " << notif.getSampleRate()
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<< " inputFrequencyOffset: " << notif.getFrequencyOffset();
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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("DSDDemod::handleMessage: MsgConfigureChannelizer");
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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 (MsgConfigureDSDDemod::match(cmd))
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{
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MsgConfigureDSDDemod& cfg = (MsgConfigureDSDDemod&) cmd;
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qDebug("DSDDemod::handleMessage: MsgConfigureDSDDemod: m_rfBandwidth");
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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 (MsgConfigureMyPosition::match(cmd))
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{
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MsgConfigureMyPosition& cfg = (MsgConfigureMyPosition&) cmd;
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m_dsdDecoder.setMyPoint(cfg.getMyLatitude(), cfg.getMyLongitude());
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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 DSDDemod::applyChannelSettings(int inputSampleRate, int inputFrequencyOffset, bool force)
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{
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qDebug() << "DSDDemod::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 DSDDemod::applySettings(const DSDDemodSettings& settings, bool force)
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{
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qDebug() << "DSDDemod::applySettings: "
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<< " m_inputFrequencyOffset: " << m_settings.m_inputFrequencyOffset
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<< " m_rfBandwidth: " << m_settings.m_rfBandwidth
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<< " m_fmDeviation: " << m_settings.m_fmDeviation
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<< " m_demodGain: " << m_settings.m_demodGain
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<< " m_volume: " << m_settings.m_volume
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<< " m_baudRate: " << m_settings.m_baudRate
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<< " m_squelchGate" << m_settings.m_squelchGate
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<< " m_squelch: " << m_settings.m_squelch
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<< " m_audioMute: " << m_settings.m_audioMute
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<< " m_enableCosineFiltering: " << m_settings.m_enableCosineFiltering
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<< " m_syncOrConstellation: " << m_settings.m_syncOrConstellation
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<< " m_slot1On: " << m_settings.m_slot1On
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<< " m_slot2On: " << m_settings.m_slot2On
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<< " m_tdmaStereo: " << m_settings.m_tdmaStereo
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<< " m_pllLock: " << m_settings.m_pllLock
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<< " m_udpCopyAudio: " << m_settings.m_copyAudioToUDP
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<< " m_udpAddress: " << m_settings.m_udpAddress
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<< " m_udpPort: " << m_settings.m_udpPort
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<< " m_highPassFilter: "<< m_settings.m_highPassFilter
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<< " force: " << force;
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if ((settings.m_rfBandwidth != m_settings.m_rfBandwidth) || 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_phaseDiscri.setFMScaling((float) settings.m_rfBandwidth / (float) settings.m_fmDeviation);
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m_settingsMutex.unlock();
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}
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if ((settings.m_fmDeviation != m_settings.m_fmDeviation) || force)
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{
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m_phaseDiscri.setFMScaling((float) settings.m_rfBandwidth / (float) settings.m_fmDeviation);
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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) || force)
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{
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// input is a value in dB
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m_squelchLevel = std::pow(10.0, settings.m_squelch / 10.0);
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}
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if ((settings.m_volume != m_settings.m_volume) || force)
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{
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m_dsdDecoder.setAudioGain(settings.m_volume);
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}
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if ((settings.m_baudRate != m_settings.m_baudRate) || force)
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{
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m_dsdDecoder.setBaudRate(settings.m_baudRate);
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}
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if ((settings.m_enableCosineFiltering != m_settings.m_enableCosineFiltering) || force)
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{
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m_dsdDecoder.enableCosineFiltering(settings.m_enableCosineFiltering);
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}
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if ((settings.m_tdmaStereo != m_settings.m_tdmaStereo) || force)
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{
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m_dsdDecoder.setTDMAStereo(settings.m_tdmaStereo);
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}
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if ((settings.m_pllLock != m_settings.m_pllLock) || force)
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{
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m_dsdDecoder.setSymbolPLLLock(settings.m_pllLock);
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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_udpBufferAudio->setAddress(const_cast<QString&>(settings.m_udpAddress));
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m_udpBufferAudio->setPort(settings.m_udpPort);
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}
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|
|
|
if ((settings.m_copyAudioToUDP != m_settings.m_copyAudioToUDP)
|
|
|| (settings.m_slot1On != m_settings.m_slot1On)
|
|
|| (settings.m_slot2On != m_settings.m_slot2On) || force)
|
|
{
|
|
m_audioFifo1.setCopyToUDP(settings.m_slot1On && settings.m_copyAudioToUDP);
|
|
m_audioFifo2.setCopyToUDP(settings.m_slot2On && !settings.m_slot1On && settings.m_copyAudioToUDP);
|
|
}
|
|
|
|
if ((settings.m_highPassFilter != m_settings.m_highPassFilter) || force)
|
|
{
|
|
m_dsdDecoder.useHPMbelib(settings.m_highPassFilter);
|
|
}
|
|
|
|
m_settings = settings;
|
|
}
|
|
|
|
QByteArray DSDDemod::serialize() const
|
|
{
|
|
return m_settings.serialize();
|
|
}
|
|
|
|
bool DSDDemod::deserialize(const QByteArray& data)
|
|
{
|
|
if (m_settings.deserialize(data))
|
|
{
|
|
MsgConfigureDSDDemod *msg = MsgConfigureDSDDemod::create(m_settings, true);
|
|
m_inputMessageQueue.push(msg);
|
|
return true;
|
|
}
|
|
else
|
|
{
|
|
m_settings.resetToDefaults();
|
|
MsgConfigureDSDDemod *msg = MsgConfigureDSDDemod::create(m_settings, true);
|
|
m_inputMessageQueue.push(msg);
|
|
return false;
|
|
}
|
|
}
|