dsddemod.cpp

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// Copyright (C) 2016 F4EXB                                                      //
// written by Edouard Griffiths                                                  //
//                                                                               //
// This program is free software; you can redistribute it and/or modify          //
// it under the terms of the GNU General Public License as published by          //
// the Free Software Foundation as version 3 of the License, or                  //
// (at your option) any later version.                                           //
//                                                                               //
// This program is distributed in the hope that it will be useful,               //
// but WITHOUT ANY WARRANTY; without even the implied warranty of                //
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                  //
// GNU General Public License V3 for more details.                               //
//                                                                               //
// You should have received a copy of the GNU General Public License             //
// along with this program. If not, see <http://www.gnu.org/licenses/>.          //


#include <string.h>
#include <stdio.h>
#include <complex.h>

#include <QTime>
#include <QDebug>
#include <QNetworkAccessManager>
#include <QNetworkReply>
#include <QBuffer>

#include "SWGChannelSettings.h"
#include "SWGDSDDemodSettings.h"
#include "SWGChannelReport.h"
#include "SWGDSDDemodReport.h"
#include "SWGRDSReport.h"

#include "audio/audiooutput.h"
#include "dsp/dspengine.h"
#include "dsp/threadedbasebandsamplesink.h"
#include "dsp/downchannelizer.h"
#include "dsp/dspcommands.h"
#include "device/deviceapi.h"
#include "util/db.h"

#include "dsddemod.h"

MESSAGE_CLASS_DEFINITION(DSDDemod::MsgConfigureChannelizer, Message)
MESSAGE_CLASS_DEFINITION(DSDDemod::MsgConfigureDSDDemod, Message)
MESSAGE_CLASS_DEFINITION(DSDDemod::MsgConfigureMyPosition, Message)

const QString DSDDemod::m_channelIdURI = "sdrangel.channel.dsddemod";
const QString DSDDemod::m_channelId = "DSDDemod";
const int DSDDemod::m_udpBlockSize = 512;

DSDDemod::DSDDemod(DeviceAPI *deviceAPI) :
        ChannelAPI(m_channelIdURI, ChannelAPI::StreamSingleSink),
        m_deviceAPI(deviceAPI),
        m_inputSampleRate(48000),
        m_inputFrequencyOffset(0),
        m_interpolatorDistance(0.0f),
        m_interpolatorDistanceRemain(0.0f),
        m_sampleCount(0),
        m_squelchCount(0),
        m_squelchGate(0),
        m_squelchLevel(1e-4),
        m_squelchOpen(false),
        m_squelchDelayLine(24000),
        m_audioFifo1(48000),
        m_audioFifo2(48000),
        m_scopeXY(0),
        m_scopeEnabled(true),
        m_dsdDecoder(),
        m_signalFormat(signalFormatNone),
        m_settingsMutex(QMutex::Recursive)
{
    setObjectName(m_channelId);

    m_audioBuffer.resize(1<<14);
    m_audioBufferFill = 0;

    m_sampleBuffer = new FixReal[1<<17]; // 128 kS
    m_sampleBufferIndex = 0;
    m_scaleFromShort = SDR_RX_SAMP_SZ < sizeof(short)*8 ? 1 : 1<<(SDR_RX_SAMP_SZ - sizeof(short)*8);

    m_magsq = 0.0f;
    m_magsqSum = 0.0f;
    m_magsqPeak = 0.0f;
    m_magsqCount = 0;

    DSPEngine::instance()->getAudioDeviceManager()->addAudioSink(&m_audioFifo1, getInputMessageQueue());
    DSPEngine::instance()->getAudioDeviceManager()->addAudioSink(&m_audioFifo2, getInputMessageQueue());
    m_audioSampleRate = DSPEngine::instance()->getAudioDeviceManager()->getOutputSampleRate();

    applyChannelSettings(m_inputSampleRate, m_inputFrequencyOffset, true);
    applySettings(m_settings, true);

    m_channelizer = new DownChannelizer(this);
    m_threadedChannelizer = new ThreadedBasebandSampleSink(m_channelizer, this);
    m_deviceAPI->addChannelSink(m_threadedChannelizer);
    m_deviceAPI->addChannelSinkAPI(this);

    m_networkManager = new QNetworkAccessManager();
    connect(m_networkManager, SIGNAL(finished(QNetworkReply*)), this, SLOT(networkManagerFinished(QNetworkReply*)));
}

DSDDemod::~DSDDemod()
{
    disconnect(m_networkManager, SIGNAL(finished(QNetworkReply*)), this, SLOT(networkManagerFinished(QNetworkReply*)));
    delete m_networkManager;
    delete[] m_sampleBuffer;
    DSPEngine::instance()->getAudioDeviceManager()->removeAudioSink(&m_audioFifo1);
    DSPEngine::instance()->getAudioDeviceManager()->removeAudioSink(&m_audioFifo2);

    m_deviceAPI->removeChannelSinkAPI(this);
    m_deviceAPI->removeChannelSink(m_threadedChannelizer);
    delete m_threadedChannelizer;
    delete m_channelizer;
}

void DSDDemod::configureMyPosition(MessageQueue* messageQueue, float myLatitude, float myLongitude)
{
    Message* cmd = MsgConfigureMyPosition::create(myLatitude, myLongitude);
    messageQueue->push(cmd);
}

void DSDDemod::feed(const SampleVector::const_iterator& begin, const SampleVector::const_iterator& end, bool firstOfBurst)
{
    (void) firstOfBurst;
    Complex ci;
    int samplesPerSymbol = m_dsdDecoder.getSamplesPerSymbol();

    m_settingsMutex.lock();
    m_scopeSampleBuffer.clear();

    m_dsdDecoder.enableMbelib(!DSPEngine::instance()->hasDVSerialSupport()); // disable mbelib if DV serial support is present and activated else enable it

    for (SampleVector::const_iterator it = begin; it != end; ++it)
    {
        Complex c(it->real(), it->imag());
        c *= m_nco.nextIQ();

        if (m_interpolator.decimate(&m_interpolatorDistanceRemain, c, &ci))
        {
            FixReal sample, delayedSample;
            qint16 sampleDSD;

            Real re = ci.real() / SDR_RX_SCALED;
            Real im = ci.imag() / SDR_RX_SCALED;
            Real magsq = re*re + im*im;
            m_movingAverage(magsq);

            m_magsqSum += magsq;

            if (magsq > m_magsqPeak)
            {
                m_magsqPeak = magsq;
            }

            m_magsqCount++;

            Real demod = m_phaseDiscri.phaseDiscriminator(ci) * m_settings.m_demodGain; // [-1.0:1.0]
            m_sampleCount++;

            // AF processing

            if (m_movingAverage.asDouble() > m_squelchLevel)
            {
                if (m_squelchGate > 0)
                {

                    if (m_squelchCount < m_squelchGate*2) {
                        m_squelchCount++;
                    }

                    m_squelchDelayLine.write(demod);
                    m_squelchOpen = m_squelchCount > m_squelchGate;
                }
                else
                {
                    m_squelchOpen = true;
                }
            }
            else
            {
                if (m_squelchGate > 0)
                {
                    if (m_squelchCount > 0) {
                        m_squelchCount--;
                    }

                    m_squelchDelayLine.write(0);
                    m_squelchOpen = m_squelchCount > m_squelchGate;
                }
                else
                {
                    m_squelchOpen = false;
                }
            }

            if (m_squelchOpen)
            {
                if (m_squelchGate > 0)
                {
                    sampleDSD = m_squelchDelayLine.readBack(m_squelchGate) * 32768.0f;   // DSD decoder takes int16 samples
                    sample = m_squelchDelayLine.readBack(m_squelchGate) * SDR_RX_SCALEF; // scale to sample size
                }
                else
                {
                    sampleDSD = demod * 32768.0f;   // DSD decoder takes int16 samples
                    sample = demod * SDR_RX_SCALEF; // scale to sample size
                }
            }
            else
            {
                sampleDSD = 0;
                sample = 0;
            }

            m_dsdDecoder.pushSample(sampleDSD);

            if (m_settings.m_enableCosineFiltering) { // show actual input to FSK demod
                sample = m_dsdDecoder.getFilteredSample() * m_scaleFromShort;
            }

            if (m_sampleBufferIndex < (1<<17)-1) {
                m_sampleBufferIndex++;
            } else {
                m_sampleBufferIndex = 0;
            }

            m_sampleBuffer[m_sampleBufferIndex] = sample;

            if (m_sampleBufferIndex < samplesPerSymbol) {
                delayedSample = m_sampleBuffer[(1<<17) - samplesPerSymbol + m_sampleBufferIndex]; // wrap
            } else {
                delayedSample = m_sampleBuffer[m_sampleBufferIndex - samplesPerSymbol];
            }

            if (m_settings.m_syncOrConstellation)
            {
                Sample s(sample, m_dsdDecoder.getSymbolSyncSample() * m_scaleFromShort * 0.84);
                m_scopeSampleBuffer.push_back(s);
            }
            else
            {
                Sample s(sample, delayedSample); // I=signal, Q=signal delayed by 20 samples (2400 baud: lowest rate)
                m_scopeSampleBuffer.push_back(s);
            }

            if (DSPEngine::instance()->hasDVSerialSupport())
            {
                if ((m_settings.m_slot1On) && m_dsdDecoder.mbeDVReady1())
                {
                    if (!m_settings.m_audioMute)
                    {
                        DSPEngine::instance()->pushMbeFrame(
                                m_dsdDecoder.getMbeDVFrame1(),
                                m_dsdDecoder.getMbeRateIndex(),
                                m_settings.m_volume * 10.0,
                                m_settings.m_tdmaStereo ? 1 : 3, // left or both channels
                                m_settings.m_highPassFilter,
                                m_audioSampleRate/8000, // upsample from native 8k
                                &m_audioFifo1);
                    }

                    m_dsdDecoder.resetMbeDV1();
                }

                if ((m_settings.m_slot2On) && m_dsdDecoder.mbeDVReady2())
                {
                    if (!m_settings.m_audioMute)
                    {
                        DSPEngine::instance()->pushMbeFrame(
                                m_dsdDecoder.getMbeDVFrame2(),
                                m_dsdDecoder.getMbeRateIndex(),
                                m_settings.m_volume * 10.0,
                                m_settings.m_tdmaStereo ? 2 : 3, // right or both channels
                                m_settings.m_highPassFilter,
                                m_audioSampleRate/8000, // upsample from native 8k
                                &m_audioFifo2);
                    }

                    m_dsdDecoder.resetMbeDV2();
                }
            }

//            if (DSPEngine::instance()->hasDVSerialSupport() && m_dsdDecoder.mbeDVReady1())
//            {
//                if (!m_settings.m_audioMute)
//                {
//                    DSPEngine::instance()->pushMbeFrame(m_dsdDecoder.getMbeDVFrame1(), m_dsdDecoder.getMbeRateIndex(), m_settings.m_volume, &m_audioFifo1);
//                }
//
//                m_dsdDecoder.resetMbeDV1();
//            }

            m_interpolatorDistanceRemain += m_interpolatorDistance;
        }
    }

    if (!DSPEngine::instance()->hasDVSerialSupport())
    {
        if (m_settings.m_slot1On)
        {
            int nbAudioSamples;
            short *dsdAudio = m_dsdDecoder.getAudio1(nbAudioSamples);

            if (nbAudioSamples > 0)
            {
                if (!m_settings.m_audioMute) {
                    m_audioFifo1.write((const quint8*) dsdAudio, nbAudioSamples);
                }

                m_dsdDecoder.resetAudio1();
            }
        }

        if (m_settings.m_slot2On)
        {
            int nbAudioSamples;
            short *dsdAudio = m_dsdDecoder.getAudio2(nbAudioSamples);

            if (nbAudioSamples > 0)
            {
                if (!m_settings.m_audioMute) {
                    m_audioFifo2.write((const quint8*) dsdAudio, nbAudioSamples);
                }

                m_dsdDecoder.resetAudio2();
            }
        }

//      int nbAudioSamples;
//      short *dsdAudio = m_dsdDecoder.getAudio1(nbAudioSamples);
//
//      if (nbAudioSamples > 0)
//      {
//          if (!m_settings.m_audioMute) {
//              uint res = m_audioFifo1.write((const quint8*) dsdAudio, nbAudioSamples, 10);
//          }
//
//          m_dsdDecoder.resetAudio1();
//      }
    }

    if ((m_scopeXY != 0) && (m_scopeEnabled))
    {
        m_scopeXY->feed(m_scopeSampleBuffer.begin(), m_scopeSampleBuffer.end(), true); // true = real samples for what it's worth
    }

    m_settingsMutex.unlock();
}

void DSDDemod::start()
{
    m_audioFifo1.clear();
    m_audioFifo2.clear();
    m_phaseDiscri.reset();
    applyChannelSettings(m_inputSampleRate, m_inputFrequencyOffset, true);
}

void DSDDemod::stop()
{
}

bool DSDDemod::handleMessage(const Message& cmd)
{
    qDebug() << "DSDDemod::handleMessage";

    if (DownChannelizer::MsgChannelizerNotification::match(cmd))
    {
        DownChannelizer::MsgChannelizerNotification& notif = (DownChannelizer::MsgChannelizerNotification&) cmd;
        qDebug() << "DSDDemod::handleMessage: MsgChannelizerNotification: inputSampleRate: " << notif.getSampleRate()
                << " inputFrequencyOffset: " << notif.getFrequencyOffset();

        applyChannelSettings(notif.getSampleRate(), notif.getFrequencyOffset());

        return true;
    }
    else if (MsgConfigureChannelizer::match(cmd))
    {
        MsgConfigureChannelizer& cfg = (MsgConfigureChannelizer&) cmd;
        qDebug("DSDDemod::handleMessage: MsgConfigureChannelizer");

        m_channelizer->configure(m_channelizer->getInputMessageQueue(),
            cfg.getSampleRate(),
            cfg.getCenterFrequency());

        return true;
    }
    else if (MsgConfigureDSDDemod::match(cmd))
    {
        MsgConfigureDSDDemod& cfg = (MsgConfigureDSDDemod&) cmd;
        qDebug("DSDDemod::handleMessage: MsgConfigureDSDDemod: m_rfBandwidth");

        applySettings(cfg.getSettings(), cfg.getForce());

        return true;
    }
    else if (MsgConfigureMyPosition::match(cmd))
    {
        MsgConfigureMyPosition& cfg = (MsgConfigureMyPosition&) cmd;
        m_dsdDecoder.setMyPoint(cfg.getMyLatitude(), cfg.getMyLongitude());
        return true;
    }
    else if (DSPConfigureAudio::match(cmd))
    {
        DSPConfigureAudio& cfg = (DSPConfigureAudio&) cmd;
        uint32_t sampleRate = cfg.getSampleRate();

        qDebug() << "DSDDemod::handleMessage: DSPConfigureAudio:"
                << " sampleRate: " << sampleRate;

        if (sampleRate != m_audioSampleRate) {
            applyAudioSampleRate(sampleRate);
        }

        return true;
    }
    else if (BasebandSampleSink::MsgThreadedSink::match(cmd))
    {
        return true;
    }
    else if (DSPSignalNotification::match(cmd))
    {
        return true;
    }
    else
    {
        return false;
    }
}

void DSDDemod::applyAudioSampleRate(int sampleRate)
{
    int upsampling = sampleRate / 8000;

    qDebug("DSDDemod::applyAudioSampleRate: audio rate: %d upsample by %d", sampleRate, upsampling);

    if (sampleRate % 8000 != 0) {
        qDebug("DSDDemod::applyAudioSampleRate: audio will sound best with sample rates that are integer multiples of 8 kS/s");
    }

    m_dsdDecoder.setUpsampling(upsampling);
    m_audioSampleRate = sampleRate;
}

void DSDDemod::applyChannelSettings(int inputSampleRate, int inputFrequencyOffset, bool force)
{
    qDebug() << "DSDDemod::applyChannelSettings:"
            << " inputSampleRate: " << inputSampleRate
            << " inputFrequencyOffset: " << inputFrequencyOffset;

    if ((inputFrequencyOffset != m_inputFrequencyOffset) ||
        (inputSampleRate != m_inputSampleRate) || force)
    {
        m_nco.setFreq(-inputFrequencyOffset, inputSampleRate);
    }

    if ((inputSampleRate != m_inputSampleRate) || force)
    {
        m_settingsMutex.lock();
        m_interpolator.create(16, inputSampleRate, (m_settings.m_rfBandwidth) / 2.2);
        m_interpolatorDistanceRemain = 0;
        m_interpolatorDistance =  (Real) inputSampleRate / (Real) 48000;
        m_settingsMutex.unlock();
    }

    m_inputSampleRate = inputSampleRate;
    m_inputFrequencyOffset = inputFrequencyOffset;
}

void DSDDemod::applySettings(const DSDDemodSettings& settings, bool force)
{
    qDebug() << "DSDDemod::applySettings: "
            << " m_inputFrequencyOffset: " << settings.m_inputFrequencyOffset
            << " m_rfBandwidth: " << settings.m_rfBandwidth
            << " m_fmDeviation: " << settings.m_fmDeviation
            << " m_demodGain: " << settings.m_demodGain
            << " m_volume: " << settings.m_volume
            << " m_baudRate: " << settings.m_baudRate
            << " m_squelchGate" << settings.m_squelchGate
            << " m_squelch: " << settings.m_squelch
            << " m_audioMute: " << settings.m_audioMute
            << " m_enableCosineFiltering: " << settings.m_enableCosineFiltering
            << " m_syncOrConstellation: " << settings.m_syncOrConstellation
            << " m_slot1On: " << settings.m_slot1On
            << " m_slot2On: " << settings.m_slot2On
            << " m_tdmaStereo: " << settings.m_tdmaStereo
            << " m_pllLock: " << settings.m_pllLock
            << " m_highPassFilter: "<< settings.m_highPassFilter
            << " m_audioDeviceName: " << settings.m_audioDeviceName
            << " m_traceLengthMutliplier: " << settings.m_traceLengthMutliplier
            << " m_traceStroke: " << settings.m_traceStroke
            << " m_traceDecay: " << settings.m_traceDecay
            << " force: " << force;

    QList<QString> reverseAPIKeys;

    if ((settings.m_inputFrequencyOffset != m_settings.m_inputFrequencyOffset) || force) {
        reverseAPIKeys.append("inputFrequencyOffset");
    }
    if ((settings.m_demodGain != m_settings.m_demodGain) || force) {
        reverseAPIKeys.append("demodGain");
    }
    if ((settings.m_audioMute != m_settings.m_audioMute) || force) {
        reverseAPIKeys.append("audioMute");
    }
    if ((settings.m_syncOrConstellation != m_settings.m_syncOrConstellation) || force) {
        reverseAPIKeys.append("syncOrConstellation");
    }
    if ((settings.m_slot1On != m_settings.m_slot1On) || force) {
        reverseAPIKeys.append("slot1On");
    }
    if ((settings.m_slot2On != m_settings.m_slot2On) || force) {
        reverseAPIKeys.append("slot2On");
    }
    if ((settings.m_demodGain != m_settings.m_demodGain) || force) {
        reverseAPIKeys.append("demodGain");
    }
    if ((settings.m_traceLengthMutliplier != m_settings.m_traceLengthMutliplier) || force) {
        reverseAPIKeys.append("traceLengthMutliplier");
    }

    if ((settings.m_rfBandwidth != m_settings.m_rfBandwidth) || force)
    {
        reverseAPIKeys.append("rfBandwidth");
        m_settingsMutex.lock();
        m_interpolator.create(16, m_inputSampleRate, (settings.m_rfBandwidth) / 2.2);
        m_interpolatorDistanceRemain = 0;
        m_interpolatorDistance =  (Real) m_inputSampleRate / (Real) 48000;
        //m_phaseDiscri.setFMScaling((float) settings.m_rfBandwidth / (float) settings.m_fmDeviation);
        m_settingsMutex.unlock();
    }

    if ((settings.m_fmDeviation != m_settings.m_fmDeviation) || force)
    {
        reverseAPIKeys.append("fmDeviation");
        m_phaseDiscri.setFMScaling(48000.0f / (2.0f*settings.m_fmDeviation));
    }

    if ((settings.m_squelchGate != m_settings.m_squelchGate) || force)
    {
        reverseAPIKeys.append("squelchGate");
        m_squelchGate = 480 * settings.m_squelchGate; // gate is given in 10s of ms at 48000 Hz audio sample rate
        m_squelchCount = 0; // reset squelch open counter
    }

    if ((settings.m_squelch != m_settings.m_squelch) || force)
    {
        reverseAPIKeys.append("squelch");
        // input is a value in dB
        m_squelchLevel = std::pow(10.0, settings.m_squelch / 10.0);
    }

    if ((settings.m_volume != m_settings.m_volume) || force)
    {
        reverseAPIKeys.append("volume");
        m_dsdDecoder.setAudioGain(settings.m_volume);
    }

    if ((settings.m_baudRate != m_settings.m_baudRate) || force)
    {
        reverseAPIKeys.append("baudRate");
        m_dsdDecoder.setBaudRate(settings.m_baudRate);
    }

    if ((settings.m_enableCosineFiltering != m_settings.m_enableCosineFiltering) || force)
    {
        reverseAPIKeys.append("enableCosineFiltering");
        m_dsdDecoder.enableCosineFiltering(settings.m_enableCosineFiltering);
    }

    if ((settings.m_tdmaStereo != m_settings.m_tdmaStereo) || force)
    {
        reverseAPIKeys.append("tdmaStereo");
        m_dsdDecoder.setTDMAStereo(settings.m_tdmaStereo);
    }

    if ((settings.m_pllLock != m_settings.m_pllLock) || force)
    {
        reverseAPIKeys.append("pllLock");
        m_dsdDecoder.setSymbolPLLLock(settings.m_pllLock);
    }

    if ((settings.m_highPassFilter != m_settings.m_highPassFilter) || force)
    {
        reverseAPIKeys.append("highPassFilter");
        m_dsdDecoder.useHPMbelib(settings.m_highPassFilter);
    }

    if ((settings.m_audioDeviceName != m_settings.m_audioDeviceName) || force)
    {
        reverseAPIKeys.append("audioDeviceName");
        AudioDeviceManager *audioDeviceManager = DSPEngine::instance()->getAudioDeviceManager();
        int audioDeviceIndex = audioDeviceManager->getOutputDeviceIndex(settings.m_audioDeviceName);
        //qDebug("AMDemod::applySettings: audioDeviceName: %s audioDeviceIndex: %d", qPrintable(settings.m_audioDeviceName), audioDeviceIndex);
        audioDeviceManager->addAudioSink(&m_audioFifo1, getInputMessageQueue(), audioDeviceIndex);
        audioDeviceManager->addAudioSink(&m_audioFifo2, getInputMessageQueue(), audioDeviceIndex);
        uint32_t audioSampleRate = audioDeviceManager->getOutputSampleRate(audioDeviceIndex);

        if (m_audioSampleRate != audioSampleRate) {
            applyAudioSampleRate(audioSampleRate);
        }
    }

    if (settings.m_useReverseAPI)
    {
        bool fullUpdate = ((m_settings.m_useReverseAPI != settings.m_useReverseAPI) && settings.m_useReverseAPI) ||
                (m_settings.m_reverseAPIAddress != settings.m_reverseAPIAddress) ||
                (m_settings.m_reverseAPIPort != settings.m_reverseAPIPort) ||
                (m_settings.m_reverseAPIDeviceIndex != settings.m_reverseAPIDeviceIndex) ||
                (m_settings.m_reverseAPIChannelIndex != settings.m_reverseAPIChannelIndex);
        webapiReverseSendSettings(reverseAPIKeys, settings, fullUpdate || force);
    }

    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;
    }
}

const char *DSDDemod::updateAndGetStatusText()
{
    formatStatusText();
    return m_formatStatusText;
}

void DSDDemod::formatStatusText()
{
    switch (getDecoder().getSyncType())
    {
    case DSDcc::DSDDecoder::DSDSyncDMRDataMS:
    case DSDcc::DSDDecoder::DSDSyncDMRDataP:
    case DSDcc::DSDDecoder::DSDSyncDMRVoiceMS:
    case DSDcc::DSDDecoder::DSDSyncDMRVoiceP:
        if (m_signalFormat != signalFormatDMR)
        {
            strcpy(m_formatStatusText, "Sta: __ S1: __________________________ S2: __________________________");
        }

        switch (getDecoder().getStationType())
        {
        case DSDcc::DSDDecoder::DSDBaseStation:
            memcpy(&m_formatStatusText[5], "BS ", 3);
            break;
        case DSDcc::DSDDecoder::DSDMobileStation:
            memcpy(&m_formatStatusText[5], "MS ", 3);
            break;
        default:
            memcpy(&m_formatStatusText[5], "NA ", 3);
            break;
        }

        memcpy(&m_formatStatusText[12], getDecoder().getDMRDecoder().getSlot0Text(), 26);
        memcpy(&m_formatStatusText[43], getDecoder().getDMRDecoder().getSlot1Text(), 26);
        m_signalFormat = signalFormatDMR;
        break;
    case DSDcc::DSDDecoder::DSDSyncDStarHeaderN:
    case DSDcc::DSDDecoder::DSDSyncDStarHeaderP:
    case DSDcc::DSDDecoder::DSDSyncDStarN:
    case DSDcc::DSDDecoder::DSDSyncDStarP:
        if (m_signalFormat != signalFormatDStar)
        {
                                     //           1    1    2    2    3    3    4    4    5    5    6    6    7    7    8
                                     // 0....5....0....5....0....5....0....5....0....5....0....5....0....5....0....5....0..
            strcpy(m_formatStatusText, "________/____>________|________>________|____________________|______:___/_____._");
                                     // MY            UR       RPT1     RPT2     Info                 Loc    Target
        }

        {
            const std::string& rpt1 = getDecoder().getDStarDecoder().getRpt1();
            const std::string& rpt2 = getDecoder().getDStarDecoder().getRpt2();
            const std::string& mySign = getDecoder().getDStarDecoder().getMySign();
            const std::string& yrSign = getDecoder().getDStarDecoder().getYourSign();

            if (rpt1.length() > 0) { // 0 or 8
                memcpy(&m_formatStatusText[23], rpt1.c_str(), 8);
            }
            if (rpt2.length() > 0) { // 0 or 8
                memcpy(&m_formatStatusText[32], rpt2.c_str(), 8);
            }
            if (yrSign.length() > 0) { // 0 or 8
                memcpy(&m_formatStatusText[14], yrSign.c_str(), 8);
            }
            if (mySign.length() > 0) { // 0 or 13
                memcpy(&m_formatStatusText[0], mySign.c_str(), 13);
            }
            memcpy(&m_formatStatusText[41], getDecoder().getDStarDecoder().getInfoText(), 20);
            memcpy(&m_formatStatusText[62], getDecoder().getDStarDecoder().getLocator(), 6);
            snprintf(&m_formatStatusText[69], 82-69, "%03d/%07.1f",
                    getDecoder().getDStarDecoder().getBearing(),
                    getDecoder().getDStarDecoder().getDistance());
        }

        m_formatStatusText[82] = '\0';
        m_signalFormat = signalFormatDStar;
        break;
    case DSDcc::DSDDecoder::DSDSyncDPMR:
        snprintf(m_formatStatusText, 82, "%s CC: %04d OI: %08d CI: %08d",
                DSDcc::DSDdPMR::dpmrFrameTypes[(int) getDecoder().getDPMRDecoder().getFrameType()],
                getDecoder().getDPMRDecoder().getColorCode(),
                getDecoder().getDPMRDecoder().getOwnId(),
                getDecoder().getDPMRDecoder().getCalledId());
        m_signalFormat = signalFormatDPMR;
        break;
    case DSDcc::DSDDecoder::DSDSyncNXDNP:
    case DSDcc::DSDDecoder::DSDSyncNXDNN:
        if (getDecoder().getNXDNDecoder().getRFChannel() == DSDcc::DSDNXDN::NXDNRCCH)
        {
            //           1    1    2    2    3    3    4    4    5    5    6    6    7    7    8
            // 0....5....0....5....0....5....0....5....0....5....0....5....0....5....0....5....0..
            // RC r cc mm llllll ssss
            snprintf(m_formatStatusText, 82, "RC %s %02d %02X %06X %02X",
                    getDecoder().getNXDNDecoder().isFullRate() ? "F" : "H",
                    getDecoder().getNXDNDecoder().getRAN(),
                    getDecoder().getNXDNDecoder().getMessageType(),
                    getDecoder().getNXDNDecoder().getLocationId(),
                    getDecoder().getNXDNDecoder().getServicesFlag());
        }
        else if ((getDecoder().getNXDNDecoder().getRFChannel() == DSDcc::DSDNXDN::NXDNRTCH)
            || (getDecoder().getNXDNDecoder().getRFChannel() == DSDcc::DSDNXDN::NXDNRDCH))
        {
            if (getDecoder().getNXDNDecoder().isIdle()) {
                snprintf(m_formatStatusText, 82, "%s IDLE", getDecoder().getNXDNDecoder().getRFChannelStr());
            }
            else
            {
                //           1    1    2    2    3    3    4    4    5    5    6    6    7    7    8
                // 0....5....0....5....0....5....0....5....0....5....0....5....0....5....0....5....0..
                // Rx r cc mm sssss>gddddd
                snprintf(m_formatStatusText, 82, "%s %s %02d %02X %05d>%c%05d",
                        getDecoder().getNXDNDecoder().getRFChannelStr(),
                        getDecoder().getNXDNDecoder().isFullRate() ? "F" : "H",
                        getDecoder().getNXDNDecoder().getRAN(),
                        getDecoder().getNXDNDecoder().getMessageType(),
                        getDecoder().getNXDNDecoder().getSourceId(),
                        getDecoder().getNXDNDecoder().isGroupCall() ? 'G' : 'I',
                        getDecoder().getNXDNDecoder().getDestinationId());
            }
        }
        else
        {
            //           1    1    2    2    3    3    4    4    5    5    6    6    7    7    8
            // 0....5....0....5....0....5....0....5....0....5....0....5....0....5....0....5....0..
            // RU
            snprintf(m_formatStatusText, 82, "RU");
        }
        m_signalFormat = signalFormatNXDN;
        break;
    case DSDcc::DSDDecoder::DSDSyncYSF:
        //           1    1    2    2    3    3    4    4    5    5    6    6    7    7    8
        // 0....5....0....5....0....5....0....5....0....5....0....5....0....5....0....5....0..
        // C V2 RI 0:7 WL000|ssssssssss>dddddddddd |UUUUUUUUUU>DDDDDDDDDD|44444
        if (getDecoder().getYSFDecoder().getFICHError() == DSDcc::DSDYSF::FICHNoError)
        {
            snprintf(m_formatStatusText, 82, "%s ", DSDcc::DSDYSF::ysfChannelTypeText[(int) getDecoder().getYSFDecoder().getFICH().getFrameInformation()]);
        }
        else
        {
            snprintf(m_formatStatusText, 82, "%d ", (int) getDecoder().getYSFDecoder().getFICHError());
        }

        snprintf(&m_formatStatusText[2], 80, "%s %s %d:%d %c%c",
                DSDcc::DSDYSF::ysfDataTypeText[(int) getDecoder().getYSFDecoder().getFICH().getDataType()],
                DSDcc::DSDYSF::ysfCallModeText[(int) getDecoder().getYSFDecoder().getFICH().getCallMode()],
                getDecoder().getYSFDecoder().getFICH().getBlockTotal(),
                getDecoder().getYSFDecoder().getFICH().getFrameTotal(),
                (getDecoder().getYSFDecoder().getFICH().isNarrowMode() ? 'N' : 'W'),
                (getDecoder().getYSFDecoder().getFICH().isInternetPath() ? 'I' : 'L'));

        if (getDecoder().getYSFDecoder().getFICH().isSquelchCodeEnabled())
        {
            snprintf(&m_formatStatusText[14], 82-14, "%03d", getDecoder().getYSFDecoder().getFICH().getSquelchCode());
        }
        else
        {
            strncpy(&m_formatStatusText[14], "---", 82-14);
        }

        char dest[13];

        if (getDecoder().getYSFDecoder().radioIdMode())
        {
            snprintf(dest, 12, "%-5s:%-5s",
                    getDecoder().getYSFDecoder().getDestId(),
                    getDecoder().getYSFDecoder().getSrcId());
        }
        else
        {
            snprintf(dest, 11, "%-10s", getDecoder().getYSFDecoder().getDest());
        }

        snprintf(&m_formatStatusText[17], 82-17, "|%-10s>%s|%-10s>%-10s|%-5s",
                getDecoder().getYSFDecoder().getSrc(),
                dest,
                getDecoder().getYSFDecoder().getUplink(),
                getDecoder().getYSFDecoder().getDownlink(),
                getDecoder().getYSFDecoder().getRem4());

        m_signalFormat = signalFormatYSF;
        break;
    default:
        m_signalFormat = signalFormatNone;
        m_formatStatusText[0] = '\0';
        break;
    }

    m_formatStatusText[82] = '\0'; // guard
}

int DSDDemod::webapiSettingsGet(
        SWGSDRangel::SWGChannelSettings& response,
        QString& errorMessage)
{
    (void) errorMessage;
    response.setDsdDemodSettings(new SWGSDRangel::SWGDSDDemodSettings());
    response.getDsdDemodSettings()->init();
    webapiFormatChannelSettings(response, m_settings);
    return 200;
}

int DSDDemod::webapiSettingsPutPatch(
        bool force,
        const QStringList& channelSettingsKeys,
        SWGSDRangel::SWGChannelSettings& response,
        QString& errorMessage)
{
    (void) errorMessage;
    DSDDemodSettings settings = m_settings;
    bool frequencyOffsetChanged = false;

    if (channelSettingsKeys.contains("inputFrequencyOffset"))
    {
        settings.m_inputFrequencyOffset = response.getDsdDemodSettings()->getInputFrequencyOffset();
        frequencyOffsetChanged = true;
    }
    if (channelSettingsKeys.contains("rfBandwidth")) {
        settings.m_rfBandwidth = response.getDsdDemodSettings()->getRfBandwidth();
    }
    if (channelSettingsKeys.contains("fmDeviation")) {
        settings.m_fmDeviation = response.getDsdDemodSettings()->getFmDeviation();
    }
    if (channelSettingsKeys.contains("demodGain")) {
        settings.m_demodGain = response.getDsdDemodSettings()->getDemodGain();
    }
    if (channelSettingsKeys.contains("volume")) {
        settings.m_volume = response.getDsdDemodSettings()->getVolume();
    }
    if (channelSettingsKeys.contains("baudRate")) {
        settings.m_baudRate = response.getDsdDemodSettings()->getBaudRate();
    }
    if (channelSettingsKeys.contains("squelchGate")) {
        settings.m_squelchGate = response.getDsdDemodSettings()->getSquelchGate();
    }
    if (channelSettingsKeys.contains("squelch")) {
        settings.m_squelch = response.getDsdDemodSettings()->getSquelch();
    }
    if (channelSettingsKeys.contains("audioMute")) {
        settings.m_audioMute = response.getDsdDemodSettings()->getAudioMute() != 0;
    }
    if (channelSettingsKeys.contains("enableCosineFiltering")) {
        settings.m_enableCosineFiltering = response.getDsdDemodSettings()->getEnableCosineFiltering() != 0;
    }
    if (channelSettingsKeys.contains("syncOrConstellation")) {
        settings.m_syncOrConstellation = response.getDsdDemodSettings()->getSyncOrConstellation() != 0;
    }
    if (channelSettingsKeys.contains("slot1On")) {
        settings.m_slot1On = response.getDsdDemodSettings()->getSlot1On() != 0;
    }
    if (channelSettingsKeys.contains("slot2On")) {
        settings.m_slot2On = response.getDsdDemodSettings()->getSlot2On() != 0;
    }
    if (channelSettingsKeys.contains("tdmaStereo")) {
        settings.m_tdmaStereo = response.getDsdDemodSettings()->getTdmaStereo() != 0;
    }
    if (channelSettingsKeys.contains("pllLock")) {
        settings.m_pllLock = response.getDsdDemodSettings()->getPllLock() != 0;
    }
    if (channelSettingsKeys.contains("rgbColor")) {
        settings.m_rgbColor = response.getDsdDemodSettings()->getRgbColor();
    }
    if (channelSettingsKeys.contains("title")) {
        settings.m_title = *response.getDsdDemodSettings()->getTitle();
    }
    if (channelSettingsKeys.contains("audioDeviceName")) {
        settings.m_audioDeviceName = *response.getDsdDemodSettings()->getAudioDeviceName();
    }
    if (channelSettingsKeys.contains("highPassFilter")) {
        settings.m_highPassFilter = response.getDsdDemodSettings()->getHighPassFilter() != 0;
    }
    if (channelSettingsKeys.contains("traceLengthMutliplier")) {
        settings.m_traceLengthMutliplier = response.getDsdDemodSettings()->getTraceLengthMutliplier();
    }
    if (channelSettingsKeys.contains("traceStroke")) {
        settings.m_traceStroke = response.getDsdDemodSettings()->getTraceStroke();
    }
    if (channelSettingsKeys.contains("traceDecay")) {
        settings.m_traceDecay = response.getDsdDemodSettings()->getTraceDecay();
    }
    if (channelSettingsKeys.contains("useReverseAPI")) {
        settings.m_useReverseAPI = response.getDsdDemodSettings()->getUseReverseApi() != 0;
    }
    if (channelSettingsKeys.contains("reverseAPIAddress")) {
        settings.m_reverseAPIAddress = *response.getDsdDemodSettings()->getReverseApiAddress();
    }
    if (channelSettingsKeys.contains("reverseAPIPort")) {
        settings.m_reverseAPIPort = response.getDsdDemodSettings()->getReverseApiPort();
    }
    if (channelSettingsKeys.contains("reverseAPIDeviceIndex")) {
        settings.m_reverseAPIDeviceIndex = response.getDsdDemodSettings()->getReverseApiDeviceIndex();
    }
    if (channelSettingsKeys.contains("reverseAPIChannelIndex")) {
        settings.m_reverseAPIChannelIndex = response.getDsdDemodSettings()->getReverseApiChannelIndex();
    }

    if (frequencyOffsetChanged)
    {
        MsgConfigureChannelizer* channelConfigMsg = MsgConfigureChannelizer::create(
                m_audioSampleRate, settings.m_inputFrequencyOffset);
        m_inputMessageQueue.push(channelConfigMsg);
    }

    MsgConfigureDSDDemod *msg = MsgConfigureDSDDemod::create(settings, force);
    m_inputMessageQueue.push(msg);

    qDebug("DSDDemod::webapiSettingsPutPatch: forward to GUI: %p", m_guiMessageQueue);
    if (m_guiMessageQueue) // forward to GUI if any
    {
        MsgConfigureDSDDemod *msgToGUI = MsgConfigureDSDDemod::create(settings, force);
        m_guiMessageQueue->push(msgToGUI);
    }

    webapiFormatChannelSettings(response, settings);

    return 200;
}

int DSDDemod::webapiReportGet(
        SWGSDRangel::SWGChannelReport& response,
        QString& errorMessage)
{
    (void) errorMessage;
    response.setDsdDemodReport(new SWGSDRangel::SWGDSDDemodReport());
    response.getDsdDemodReport()->init();
    webapiFormatChannelReport(response);
    return 200;
}

void DSDDemod::webapiFormatChannelSettings(SWGSDRangel::SWGChannelSettings& response, const DSDDemodSettings& settings)
{
    response.getDsdDemodSettings()->setInputFrequencyOffset(settings.m_inputFrequencyOffset);
    response.getDsdDemodSettings()->setRfBandwidth(settings.m_rfBandwidth);
    response.getDsdDemodSettings()->setFmDeviation(settings.m_fmDeviation);
    response.getDsdDemodSettings()->setDemodGain(settings.m_demodGain);
    response.getDsdDemodSettings()->setVolume(settings.m_volume);
    response.getDsdDemodSettings()->setBaudRate(settings.m_baudRate);
    response.getDsdDemodSettings()->setSquelchGate(settings.m_squelchGate);
    response.getDsdDemodSettings()->setSquelch(settings.m_squelch);
    response.getDsdDemodSettings()->setAudioMute(settings.m_audioMute ? 1 : 0);
    response.getDsdDemodSettings()->setEnableCosineFiltering(settings.m_enableCosineFiltering ? 1 : 0);
    response.getDsdDemodSettings()->setSyncOrConstellation(settings.m_syncOrConstellation ? 1 : 0);
    response.getDsdDemodSettings()->setSlot1On(settings.m_slot1On ? 1 : 0);
    response.getDsdDemodSettings()->setSlot2On(settings.m_slot2On ? 1 : 0);
    response.getDsdDemodSettings()->setTdmaStereo(settings.m_tdmaStereo ? 1 : 0);
    response.getDsdDemodSettings()->setPllLock(settings.m_pllLock ? 1 : 0);
    response.getDsdDemodSettings()->setRgbColor(settings.m_rgbColor);

    if (response.getDsdDemodSettings()->getTitle()) {
        *response.getDsdDemodSettings()->getTitle() = settings.m_title;
    } else {
        response.getDsdDemodSettings()->setTitle(new QString(settings.m_title));
    }

    if (response.getDsdDemodSettings()->getAudioDeviceName()) {
        *response.getDsdDemodSettings()->getAudioDeviceName() = settings.m_audioDeviceName;
    } else {
        response.getDsdDemodSettings()->setAudioDeviceName(new QString(settings.m_audioDeviceName));
    }

    response.getDsdDemodSettings()->setHighPassFilter(settings.m_highPassFilter ? 1 : 0);
    response.getDsdDemodSettings()->setTraceLengthMutliplier(settings.m_traceLengthMutliplier);
    response.getDsdDemodSettings()->setTraceStroke(settings.m_traceStroke);
    response.getDsdDemodSettings()->setTraceDecay(settings.m_traceDecay);
    response.getDsdDemodSettings()->setUseReverseApi(settings.m_useReverseAPI ? 1 : 0);

    if (response.getDsdDemodSettings()->getReverseApiAddress()) {
        *response.getDsdDemodSettings()->getReverseApiAddress() = settings.m_reverseAPIAddress;
    } else {
        response.getDsdDemodSettings()->setReverseApiAddress(new QString(settings.m_reverseAPIAddress));
    }

    response.getDsdDemodSettings()->setReverseApiPort(settings.m_reverseAPIPort);
    response.getDsdDemodSettings()->setReverseApiDeviceIndex(settings.m_reverseAPIDeviceIndex);
    response.getDsdDemodSettings()->setReverseApiChannelIndex(settings.m_reverseAPIChannelIndex);

}

void DSDDemod::webapiFormatChannelReport(SWGSDRangel::SWGChannelReport& response)
{
    double magsqAvg, magsqPeak;
    int nbMagsqSamples;
    getMagSqLevels(magsqAvg, magsqPeak, nbMagsqSamples);

    response.getDsdDemodReport()->setChannelPowerDb(CalcDb::dbPower(magsqAvg));
    response.getDsdDemodReport()->setAudioSampleRate(m_audioSampleRate);
    response.getDsdDemodReport()->setChannelSampleRate(m_inputSampleRate);
    response.getDsdDemodReport()->setSquelch(m_squelchOpen ? 1 : 0);
    response.getDsdDemodReport()->setPllLocked(getDecoder().getSymbolPLLLocked() ? 1 : 0);
    response.getDsdDemodReport()->setSlot1On(getDecoder().getVoice1On() ? 1 : 0);
    response.getDsdDemodReport()->setSlot2On(getDecoder().getVoice2On() ? 1 : 0);
    response.getDsdDemodReport()->setSyncType(new QString(getDecoder().getFrameTypeText()));
    response.getDsdDemodReport()->setInLevel(getDecoder().getInLevel());
    response.getDsdDemodReport()->setCarierPosition(getDecoder().getCarrierPos());
    response.getDsdDemodReport()->setZeroCrossingPosition(getDecoder().getZeroCrossingPos());
    response.getDsdDemodReport()->setSyncRate(getDecoder().getSymbolSyncQuality());
    response.getDsdDemodReport()->setStatusText(new QString(updateAndGetStatusText()));
}

void DSDDemod::webapiReverseSendSettings(QList<QString>& channelSettingsKeys, const DSDDemodSettings& settings, bool force)
{
    SWGSDRangel::SWGChannelSettings *swgChannelSettings = new SWGSDRangel::SWGChannelSettings();
    swgChannelSettings->setDirection(0); // single sink (Rx)
    swgChannelSettings->setOriginatorChannelIndex(getIndexInDeviceSet());
    swgChannelSettings->setOriginatorDeviceSetIndex(getDeviceSetIndex());
    swgChannelSettings->setChannelType(new QString("DSDDemod"));
    swgChannelSettings->setDsdDemodSettings(new SWGSDRangel::SWGDSDDemodSettings());
    SWGSDRangel::SWGDSDDemodSettings *swgDSDDemodSettings = swgChannelSettings->getDsdDemodSettings();

    // transfer data that has been modified. When force is on transfer all data except reverse API data

    if (channelSettingsKeys.contains("inputFrequencyOffset") || force) {
        swgDSDDemodSettings->setInputFrequencyOffset(settings.m_inputFrequencyOffset);
    }
    if (channelSettingsKeys.contains("rfBandwidth") || force) {
        swgDSDDemodSettings->setRfBandwidth(settings.m_rfBandwidth);
    }
    if (channelSettingsKeys.contains("fmDeviation") || force) {
        swgDSDDemodSettings->setFmDeviation(settings.m_fmDeviation);
    }
    if (channelSettingsKeys.contains("demodGain") || force) {
        swgDSDDemodSettings->setDemodGain(settings.m_demodGain);
    }
    if (channelSettingsKeys.contains("volume") || force) {
        swgDSDDemodSettings->setVolume(settings.m_volume);
    }
    if (channelSettingsKeys.contains("baudRate") || force) {
        swgDSDDemodSettings->setBaudRate(settings.m_baudRate);
    }
    if (channelSettingsKeys.contains("squelchGate") || force) {
        swgDSDDemodSettings->setSquelchGate(settings.m_squelchGate);
    }
    if (channelSettingsKeys.contains("squelch") || force) {
        swgDSDDemodSettings->setSquelch(settings.m_squelch);
    }
    if (channelSettingsKeys.contains("audioMute") || force) {
        swgDSDDemodSettings->setAudioMute(settings.m_audioMute ? 1 : 0);
    }
    if (channelSettingsKeys.contains("enableCosineFiltering") || force) {
        swgDSDDemodSettings->setEnableCosineFiltering(settings.m_enableCosineFiltering ? 1 : 0);
    }
    if (channelSettingsKeys.contains("syncOrConstellation") || force) {
        swgDSDDemodSettings->setSyncOrConstellation(settings.m_syncOrConstellation ? 1 : 0);
    }
    if (channelSettingsKeys.contains("slot1On") || force) {
        swgDSDDemodSettings->setSlot1On(settings.m_slot1On ? 1 : 0);
    }
    if (channelSettingsKeys.contains("slot2On") || force) {
        swgDSDDemodSettings->setSlot2On(settings.m_slot2On ? 1 : 0);
    }
    if (channelSettingsKeys.contains("tdmaStereo") || force) {
        swgDSDDemodSettings->setTdmaStereo(settings.m_tdmaStereo ? 1 : 0);
    }
    if (channelSettingsKeys.contains("pllLock") || force) {
        swgDSDDemodSettings->setPllLock(settings.m_pllLock ? 1 : 0);
    }
    if (channelSettingsKeys.contains("rgbColor") || force) {
        swgDSDDemodSettings->setRgbColor(settings.m_rgbColor);
    }
    if (channelSettingsKeys.contains("title") || force) {
        swgDSDDemodSettings->setTitle(new QString(settings.m_title));
    }
    if (channelSettingsKeys.contains("audioDeviceName") || force) {
        swgDSDDemodSettings->setAudioDeviceName(new QString(settings.m_audioDeviceName));
    }
    if (channelSettingsKeys.contains("highPassFilter") || force) {
        swgDSDDemodSettings->setHighPassFilter(settings.m_highPassFilter ? 1 : 0);
    }
    if (channelSettingsKeys.contains("traceLengthMutliplier") || force) {
        swgDSDDemodSettings->setTraceLengthMutliplier(settings.m_traceLengthMutliplier);
    }
    if (channelSettingsKeys.contains("traceStroke") || force) {
        swgDSDDemodSettings->setTraceStroke(settings.m_traceStroke);
    }
    if (channelSettingsKeys.contains("traceDecay") || force) {
        swgDSDDemodSettings->setTraceDecay(settings.m_traceDecay);
    }

    QString channelSettingsURL = QString("http://%1:%2/sdrangel/deviceset/%3/channel/%4/settings")
            .arg(settings.m_reverseAPIAddress)
            .arg(settings.m_reverseAPIPort)
            .arg(settings.m_reverseAPIDeviceIndex)
            .arg(settings.m_reverseAPIChannelIndex);
    m_networkRequest.setUrl(QUrl(channelSettingsURL));
    m_networkRequest.setHeader(QNetworkRequest::ContentTypeHeader, "application/json");

    QBuffer *buffer=new QBuffer();
    buffer->open((QBuffer::ReadWrite));
    buffer->write(swgChannelSettings->asJson().toUtf8());
    buffer->seek(0);

    // Always use PATCH to avoid passing reverse API settings
    m_networkManager->sendCustomRequest(m_networkRequest, "PATCH", buffer);

    delete swgChannelSettings;
}

void DSDDemod::networkManagerFinished(QNetworkReply *reply)
{
    QNetworkReply::NetworkError replyError = reply->error();

    if (replyError)
    {
        qWarning() << "DSDDemod::networkManagerFinished:"
                << " error(" << (int) replyError
                << "): " << replyError
                << ": " << reply->errorString();
        return;
    }

    QString answer = reply->readAll();
    answer.chop(1); // remove last \n
    qDebug("DSDDemod::networkManagerFinished: reply:\n%s", answer.toStdString().c_str());
}