1
0
mirror of https://github.com/f4exb/sdrangel.git synced 2026-07-18 00:34:13 -04:00

SampleSourceFifo refactoring and Tx code reorganization

This commit is contained in:
f4exb
2019-11-15 01:04:24 +01:00
parent 246ff824af
commit 3b74153ec6
198 changed files with 13267 additions and 7750 deletions
+59 -463
View File
@@ -19,24 +19,21 @@
#include <QNetworkAccessManager>
#include <QNetworkReply>
#include <QBuffer>
#include <QThread>
#include "SWGChannelSettings.h"
#include "SWGChannelReport.h"
#include "SWGUDPSourceReport.h"
#include "device/deviceapi.h"
#include "dsp/upchannelizer.h"
#include "dsp/threadedbasebandsamplesource.h"
#include "dsp/dspcommands.h"
#include "util/db.h"
#include "udpsourcebaseband.h"
#include "udpsource.h"
#include "udpsourcemsg.h"
MESSAGE_CLASS_DEFINITION(UDPSource::MsgConfigureUDPSource, Message)
MESSAGE_CLASS_DEFINITION(UDPSource::MsgConfigureChannelizer, Message)
MESSAGE_CLASS_DEFINITION(UDPSource::MsgUDPSourceSpectrum, Message)
MESSAGE_CLASS_DEFINITION(UDPSource::MsgResetReadIndex, Message)
const QString UDPSource::m_channelIdURI = "sdrangel.channeltx.udpsource";
const QString UDPSource::m_channelId = "UDPSource";
@@ -44,43 +41,17 @@ const QString UDPSource::m_channelId = "UDPSource";
UDPSource::UDPSource(DeviceAPI *deviceAPI) :
ChannelAPI(m_channelIdURI, ChannelAPI::StreamSingleSource),
m_deviceAPI(deviceAPI),
m_basebandSampleRate(48000),
m_outputSampleRate(48000),
m_inputFrequencyOffset(0),
m_squelch(1e-6),
m_spectrum(0),
m_spectrumEnabled(false),
m_spectrumChunkSize(2160),
m_spectrumChunkCounter(0),
m_magsq(1e-10),
m_movingAverage(16, 1e-10),
m_inMovingAverage(480, 1e-10),
m_sampleRateSum(0),
m_sampleRateAvgCounter(0),
m_levelCalcCount(0),
m_peakLevel(0.0f),
m_levelSum(0.0f),
m_levelNbSamples(480),
m_squelchOpen(false),
m_squelchOpenCount(0),
m_squelchCloseCount(0),
m_squelchThreshold(4800),
m_modPhasor(0.0f),
m_SSBFilterBufferIndex(0),
m_settingsMutex(QMutex::Recursive)
{
setObjectName(m_channelId);
m_udpHandler.setFeedbackMessageQueue(&m_inputMessageQueue);
m_SSBFilter = new fftfilt(m_settings.m_lowCutoff / m_settings.m_inputSampleRate, m_settings.m_rfBandwidth / m_settings.m_inputSampleRate, m_ssbFftLen);
m_SSBFilterBuffer = new Complex[m_ssbFftLen>>1]; // filter returns data exactly half of its size
m_thread = new QThread(this);
m_basebandSource = new UDPSourceBaseband();
m_basebandSource->moveToThread(m_thread);
applyChannelSettings(m_basebandSampleRate, m_outputSampleRate, m_inputFrequencyOffset, true);
applySettings(m_settings, true);
m_channelizer = new UpChannelizer(this);
m_threadedChannelizer = new ThreadedBasebandSampleSource(m_channelizer, this);
m_deviceAPI->addChannelSource(m_threadedChannelizer);
m_deviceAPI->addChannelSource(this);
m_deviceAPI->addChannelSourceAPI(this);
m_networkManager = new QNetworkAccessManager();
@@ -92,262 +63,42 @@ UDPSource::~UDPSource()
disconnect(m_networkManager, SIGNAL(finished(QNetworkReply*)), this, SLOT(networkManagerFinished(QNetworkReply*)));
delete m_networkManager;
m_deviceAPI->removeChannelSourceAPI(this);
m_deviceAPI->removeChannelSource(m_threadedChannelizer);
delete m_threadedChannelizer;
delete m_channelizer;
delete m_SSBFilter;
delete[] m_SSBFilterBuffer;
m_deviceAPI->removeChannelSource(this);
delete m_basebandSource;
delete m_thread;
}
void UDPSource::start()
{
m_udpHandler.start();
applyChannelSettings(m_basebandSampleRate, m_outputSampleRate, m_inputFrequencyOffset, true);
qDebug("UDPSource::start");
m_basebandSource->reset();
m_thread->start();
}
void UDPSource::stop()
{
m_udpHandler.stop();
qDebug("UDPSource::stop");
m_thread->exit();
m_thread->wait();
}
void UDPSource::pull(Sample& sample)
void UDPSource::pull(SampleVector::iterator& begin, unsigned int nbSamples)
{
if (m_settings.m_channelMute)
{
sample.m_real = 0.0f;
sample.m_imag = 0.0f;
initSquelch(false);
return;
}
Complex ci;
m_settingsMutex.lock();
if (m_interpolatorDistance > 1.0f) // decimate
{
modulateSample();
while (!m_interpolator.decimate(&m_interpolatorDistanceRemain, m_modSample, &ci))
{
modulateSample();
}
}
else
{
if (m_interpolator.interpolate(&m_interpolatorDistanceRemain, m_modSample, &ci))
{
modulateSample();
}
}
m_interpolatorDistanceRemain += m_interpolatorDistance;
ci *= m_carrierNco.nextIQ(); // shift to carrier frequency
m_settingsMutex.unlock();
double magsq = ci.real() * ci.real() + ci.imag() * ci.imag();
magsq /= (SDR_TX_SCALED*SDR_TX_SCALED);
m_movingAverage.feed(magsq);
m_magsq = m_movingAverage.average();
sample.m_real = (FixReal) ci.real();
sample.m_imag = (FixReal) ci.imag();
}
void UDPSource::modulateSample()
{
if (m_settings.m_sampleFormat == UDPSourceSettings::FormatSnLE) // Linear I/Q transponding
{
Sample s;
m_udpHandler.readSample(s);
uint64_t magsq = s.m_real * s.m_real + s.m_imag * s.m_imag;
m_inMovingAverage.feed(magsq/(SDR_TX_SCALED*SDR_TX_SCALED));
m_inMagsq = m_inMovingAverage.average();
calculateSquelch(m_inMagsq);
if (m_squelchOpen)
{
m_modSample.real(s.m_real * m_settings.m_gainOut);
m_modSample.imag(s.m_imag * m_settings.m_gainOut);
calculateLevel(m_modSample);
}
else
{
m_modSample.real(0.0f);
m_modSample.imag(0.0f);
}
}
else if (m_settings.m_sampleFormat == UDPSourceSettings::FormatNFM)
{
qint16 t;
readMonoSample(t);
m_inMovingAverage.feed((t*t)/1073741824.0);
m_inMagsq = m_inMovingAverage.average();
calculateSquelch(m_inMagsq);
if (m_squelchOpen)
{
m_modPhasor += (m_settings.m_fmDeviation / m_settings.m_inputSampleRate) * (t / SDR_TX_SCALEF) * M_PI * 2.0f;
m_modSample.real(cos(m_modPhasor) * 0.3162292f * SDR_TX_SCALEF * m_settings.m_gainOut);
m_modSample.imag(sin(m_modPhasor) * 0.3162292f * SDR_TX_SCALEF * m_settings.m_gainOut);
calculateLevel(m_modSample);
}
else
{
m_modSample.real(0.0f);
m_modSample.imag(0.0f);
}
}
else if (m_settings.m_sampleFormat == UDPSourceSettings::FormatAM)
{
qint16 t;
readMonoSample(t);
m_inMovingAverage.feed((t*t)/(SDR_TX_SCALED*SDR_TX_SCALED));
m_inMagsq = m_inMovingAverage.average();
calculateSquelch(m_inMagsq);
if (m_squelchOpen)
{
m_modSample.real(((t / SDR_TX_SCALEF)*m_settings.m_amModFactor*m_settings.m_gainOut + 1.0f) * (SDR_TX_SCALEF/2)); // modulate and scale zero frequency carrier
m_modSample.imag(0.0f);
calculateLevel(m_modSample);
}
else
{
m_modSample.real(0.0f);
m_modSample.imag(0.0f);
}
}
else if ((m_settings.m_sampleFormat == UDPSourceSettings::FormatLSB) || (m_settings.m_sampleFormat == UDPSourceSettings::FormatUSB))
{
qint16 t;
Complex c, ci;
fftfilt::cmplx *filtered;
int n_out = 0;
readMonoSample(t);
m_inMovingAverage.feed((t*t)/(SDR_TX_SCALED*SDR_TX_SCALED));
m_inMagsq = m_inMovingAverage.average();
calculateSquelch(m_inMagsq);
if (m_squelchOpen)
{
ci.real((t / SDR_TX_SCALEF) * m_settings.m_gainOut);
ci.imag(0.0f);
n_out = m_SSBFilter->runSSB(ci, &filtered, (m_settings.m_sampleFormat == UDPSourceSettings::FormatUSB));
if (n_out > 0)
{
memcpy((void *) m_SSBFilterBuffer, (const void *) filtered, n_out*sizeof(Complex));
m_SSBFilterBufferIndex = 0;
}
c = m_SSBFilterBuffer[m_SSBFilterBufferIndex];
m_modSample.real(m_SSBFilterBuffer[m_SSBFilterBufferIndex].real() * SDR_TX_SCALEF);
m_modSample.imag(m_SSBFilterBuffer[m_SSBFilterBufferIndex].imag() * SDR_TX_SCALEF);
m_SSBFilterBufferIndex++;
calculateLevel(m_modSample);
}
else
{
m_modSample.real(0.0f);
m_modSample.imag(0.0f);
}
}
else
{
m_modSample.real(0.0f);
m_modSample.imag(0.0f);
initSquelch(false);
}
if (m_spectrum && m_spectrumEnabled && (m_spectrumChunkCounter < m_spectrumChunkSize - 1))
{
Sample s;
s.m_real = (FixReal) m_modSample.real();
s.m_imag = (FixReal) m_modSample.imag();
m_sampleBuffer.push_back(s);
m_spectrumChunkCounter++;
}
else if (m_spectrum)
{
m_spectrum->feed(m_sampleBuffer.begin(), m_sampleBuffer.end(), false);
m_sampleBuffer.clear();
m_spectrumChunkCounter = 0;
}
}
void UDPSource::calculateLevel(Real sample)
{
if (m_levelCalcCount < m_levelNbSamples)
{
m_peakLevel = std::max(std::fabs(m_peakLevel), sample);
m_levelSum += sample * sample;
m_levelCalcCount++;
}
else
{
qreal rmsLevel = m_levelSum > 0.0 ? sqrt(m_levelSum / m_levelNbSamples) : 0.0;
//qDebug("NFMMod::calculateLevel: %f %f", rmsLevel, m_peakLevel);
emit levelChanged(rmsLevel, m_peakLevel, m_levelNbSamples);
m_peakLevel = 0.0f;
m_levelSum = 0.0f;
m_levelCalcCount = 0;
}
}
void UDPSource::calculateLevel(Complex sample)
{
Real t = std::abs(sample);
if (m_levelCalcCount < m_levelNbSamples)
{
m_peakLevel = std::max(std::fabs(m_peakLevel), t);
m_levelSum += (t * t);
m_levelCalcCount++;
}
else
{
qreal rmsLevel = m_levelSum > 0.0 ? sqrt((m_levelSum/(SDR_TX_SCALED*SDR_TX_SCALED)) / m_levelNbSamples) : 0.0;
emit levelChanged(rmsLevel, m_peakLevel / SDR_TX_SCALEF, m_levelNbSamples);
m_peakLevel = 0.0f;
m_levelSum = 0.0f;
m_levelCalcCount = 0;
}
m_basebandSource->pull(begin, nbSamples);
}
bool UDPSource::handleMessage(const Message& cmd)
{
if (UpChannelizer::MsgChannelizerNotification::match(cmd))
{
UpChannelizer::MsgChannelizerNotification& notif = (UpChannelizer::MsgChannelizerNotification&) cmd;
qDebug() << "UDPSource::handleMessage: MsgChannelizerNotification";
applyChannelSettings(notif.getBasebandSampleRate(), notif.getSampleRate(), notif.getFrequencyOffset());
return true;
}
else if (MsgConfigureChannelizer::match(cmd))
if (MsgConfigureChannelizer::match(cmd))
{
MsgConfigureChannelizer& cfg = (MsgConfigureChannelizer&) cmd;
qDebug() << "UDPSource::handleMessage: MsgConfigureChannelizer:"
<< " sampleRate: " << cfg.getSampleRate()
<< " centerFrequency: " << cfg.getCenterFrequency();
qDebug() << "AMMod::handleMessage: MsgConfigureChannelizer:"
<< " getSourceSampleRate: " << cfg.getSourceSampleRate()
<< " getSourceCenterFrequency: " << cfg.getSourceCenterFrequency();
m_channelizer->configure(m_channelizer->getInputMessageQueue(),
cfg.getSampleRate(),
cfg.getCenterFrequency());
UDPSourceBaseband::MsgConfigureChannelizer *msg
= UDPSourceBaseband::MsgConfigureChannelizer::create(cfg.getSourceSampleRate(), cfg.getSourceCenterFrequency());
m_basebandSource->getInputMessageQueue()->push(msg);
return true;
}
@@ -360,133 +111,37 @@ bool UDPSource::handleMessage(const Message& cmd)
return true;
}
else if (UDPSourceMessages::MsgSampleRateCorrection::match(cmd))
{
UDPSourceMessages::MsgSampleRateCorrection& cfg = (UDPSourceMessages::MsgSampleRateCorrection&) cmd;
Real newSampleRate = m_actualInputSampleRate + cfg.getCorrectionFactor() * m_actualInputSampleRate;
// exclude values too way out nominal sample rate (20%)
if ((newSampleRate < m_settings.m_inputSampleRate * 1.2) && (newSampleRate > m_settings.m_inputSampleRate * 0.8))
{
m_actualInputSampleRate = newSampleRate;
if ((cfg.getRawDeltaRatio() > -0.05) && (cfg.getRawDeltaRatio() < 0.05))
{
if (m_sampleRateAvgCounter < m_sampleRateAverageItems)
{
m_sampleRateSum += m_actualInputSampleRate;
m_sampleRateAvgCounter++;
}
}
else
{
m_sampleRateSum = 0.0;
m_sampleRateAvgCounter = 0;
}
if (m_sampleRateAvgCounter == m_sampleRateAverageItems)
{
float avgRate = m_sampleRateSum / m_sampleRateAverageItems;
qDebug("UDPSource::handleMessage: MsgSampleRateCorrection: corr: %+.6f new rate: %.0f: avg rate: %.0f",
cfg.getCorrectionFactor(),
m_actualInputSampleRate,
avgRate);
m_actualInputSampleRate = avgRate;
m_sampleRateSum = 0.0;
m_sampleRateAvgCounter = 0;
}
// else
// {
// qDebug("UDPSource::handleMessage: MsgSampleRateCorrection: corr: %+.6f new rate: %.0f",
// cfg.getCorrectionFactor(),
// m_actualInputSampleRate);
// }
m_settingsMutex.lock();
m_interpolatorDistanceRemain = 0;
m_interpolatorConsumed = false;
m_interpolatorDistance = (Real) m_actualInputSampleRate / (Real) m_outputSampleRate;
//m_interpolator.create(48, m_actualInputSampleRate, m_settings.m_rfBandwidth / 2.2, 3.0); // causes clicking: leaving at standard frequency
m_settingsMutex.unlock();
}
return true;
}
else if (MsgUDPSourceSpectrum::match(cmd))
{
MsgUDPSourceSpectrum& spc = (MsgUDPSourceSpectrum&) cmd;
m_spectrumEnabled = spc.getEnabled();
qDebug() << "UDPSource::handleMessage: MsgUDPSourceSpectrum: m_spectrumEnabled: " << m_spectrumEnabled;
return true;
}
else if (MsgResetReadIndex::match(cmd))
{
m_settingsMutex.lock();
m_udpHandler.resetReadIndex();
m_settingsMutex.unlock();
qDebug() << "UDPSource::handleMessage: MsgResetReadIndex";
return true;
}
else if (DSPSignalNotification::match(cmd))
{
// Forward to the source
DSPSignalNotification& notif = (DSPSignalNotification&) cmd;
DSPSignalNotification* rep = new DSPSignalNotification(notif); // make a copy
qDebug() << "UDPSource::handleMessage: DSPSignalNotification";
m_basebandSource->getInputMessageQueue()->push(rep);
return true;
}
else
{
if(m_spectrum != 0)
{
return m_spectrum->handleMessage(cmd);
}
else
{
return false;
}
return false;
}
}
void UDPSource::setSpectrumSink(BasebandSampleSink* spectrum)
{
m_basebandSource->setSpectrumSink(spectrum);
}
void UDPSource::setSpectrum(bool enabled)
{
Message* cmd = MsgUDPSourceSpectrum::create(enabled);
getInputMessageQueue()->push(cmd);
Message* cmd = UDPSourceBaseband::MsgUDPSourceSpectrum::create(enabled);
m_basebandSource->getInputMessageQueue()->push(cmd);
}
void UDPSource::resetReadIndex()
{
Message* cmd = MsgResetReadIndex::create();
getInputMessageQueue()->push(cmd);
}
void UDPSource::applyChannelSettings(int basebandSampleRate, int outputSampleRate, int inputFrequencyOffset, bool force)
{
qDebug() << "UDPSource::applyChannelSettings:"
<< " basebandSampleRate: " << basebandSampleRate
<< " outputSampleRate: " << outputSampleRate
<< " inputFrequencyOffset: " << inputFrequencyOffset;
if ((inputFrequencyOffset != m_inputFrequencyOffset) ||
(outputSampleRate != m_outputSampleRate) || force)
{
m_settingsMutex.lock();
m_carrierNco.setFreq(inputFrequencyOffset, outputSampleRate);
m_settingsMutex.unlock();
}
if (((outputSampleRate != m_outputSampleRate) && (!m_settings.m_autoRWBalance)) || force)
{
m_settingsMutex.lock();
m_interpolatorDistanceRemain = 0;
m_interpolatorConsumed = false;
m_interpolatorDistance = (Real) m_settings.m_inputSampleRate / (Real) outputSampleRate;
m_interpolator.create(48, m_settings.m_inputSampleRate, m_settings.m_rfBandwidth / 2.2, 3.0);
m_settingsMutex.unlock();
}
m_basebandSampleRate = basebandSampleRate;
m_outputSampleRate = outputSampleRate;
m_inputFrequencyOffset = inputFrequencyOffset;
Message* cmd = UDPSourceBaseband::MsgResetReadIndex::create();
m_basebandSource->getInputMessageQueue()->push(cmd);
}
void UDPSource::applySettings(const UDPSourceSettings& settings, bool force)
@@ -565,76 +220,8 @@ void UDPSource::applySettings(const UDPSourceSettings& settings, bool force)
reverseAPIKeys.append("stereoInput");
}
if((settings.m_rfBandwidth != m_settings.m_rfBandwidth) ||
(settings.m_lowCutoff != m_settings.m_lowCutoff) ||
(settings.m_inputSampleRate != m_settings.m_inputSampleRate) || force)
{
m_settingsMutex.lock();
m_interpolatorDistanceRemain = 0;
m_interpolatorConsumed = false;
m_interpolatorDistance = (Real) settings.m_inputSampleRate / (Real) m_outputSampleRate;
m_interpolator.create(48, settings.m_inputSampleRate, settings.m_rfBandwidth / 2.2, 3.0);
m_actualInputSampleRate = settings.m_inputSampleRate;
m_udpHandler.resetReadIndex();
m_sampleRateSum = 0.0;
m_sampleRateAvgCounter = 0;
m_spectrumChunkSize = settings.m_inputSampleRate * 0.05; // 50 ms chunk
m_spectrumChunkCounter = 0;
m_levelNbSamples = settings.m_inputSampleRate * 0.01; // every 10 ms
m_levelCalcCount = 0;
m_peakLevel = 0.0f;
m_levelSum = 0.0f;
m_udpHandler.resizeBuffer(settings.m_inputSampleRate);
m_inMovingAverage.resize(settings.m_inputSampleRate * 0.01, 1e-10); // 10 ms
m_squelchThreshold = settings.m_inputSampleRate * settings.m_squelchGate;
initSquelch(m_squelchOpen);
m_SSBFilter->create_filter(settings.m_lowCutoff / settings.m_inputSampleRate, settings.m_rfBandwidth / settings.m_inputSampleRate);
m_settingsMutex.unlock();
}
if ((settings.m_squelch != m_settings.m_squelch) || force)
{
m_squelch = CalcDb::powerFromdB(settings.m_squelch);
}
if ((settings.m_squelchGate != m_settings.m_squelchGate) || force)
{
m_squelchThreshold = m_outputSampleRate * settings.m_squelchGate;
initSquelch(m_squelchOpen);
}
if ((settings.m_udpAddress != m_settings.m_udpAddress) ||
(settings.m_udpPort != m_settings.m_udpPort) || force)
{
m_settingsMutex.lock();
m_udpHandler.configureUDPLink(settings.m_udpAddress, settings.m_udpPort);
m_settingsMutex.unlock();
}
if ((settings.m_channelMute != m_settings.m_channelMute) || force)
{
if (!settings.m_channelMute) {
m_udpHandler.resetReadIndex();
}
}
if ((settings.m_autoRWBalance != m_settings.m_autoRWBalance) || force)
{
m_settingsMutex.lock();
m_udpHandler.setAutoRWBalance(settings.m_autoRWBalance);
if (!settings.m_autoRWBalance)
{
m_interpolatorDistanceRemain = 0;
m_interpolatorConsumed = false;
m_interpolatorDistance = (Real) settings.m_inputSampleRate / (Real) m_outputSampleRate;
m_interpolator.create(48, settings.m_inputSampleRate, settings.m_rfBandwidth / 2.2, 3.0);
m_actualInputSampleRate = settings.m_inputSampleRate;
m_udpHandler.resetReadIndex();
}
m_settingsMutex.unlock();
}
UDPSourceBaseband::MsgConfigureUDPSourceBaseband *msg = UDPSourceBaseband::MsgConfigureUDPSourceBaseband::create(settings, force);
m_basebandSource->getInputMessageQueue()->push(msg);
if (settings.m_useReverseAPI)
{
@@ -854,9 +441,9 @@ void UDPSource::webapiFormatChannelReport(SWGSDRangel::SWGChannelReport& respons
{
response.getUdpSourceReport()->setInputPowerDb(CalcDb::dbPower(getInMagSq()));
response.getUdpSourceReport()->setChannelPowerDb(CalcDb::dbPower(getMagSq()));
response.getUdpSourceReport()->setSquelch(m_squelchOpen ? 1 : 0);
response.getUdpSourceReport()->setSquelch(m_basebandSource->isSquelchOpen() ? 1 : 0);
response.getUdpSourceReport()->setBufferGauge(getBufferGauge());
response.getUdpSourceReport()->setChannelSampleRate(m_outputSampleRate);
response.getUdpSourceReport()->setChannelSampleRate(m_basebandSource->getChannelSampleRate());
}
void UDPSource::webapiReverseSendSettings(QList<QString>& channelSettingsKeys, const UDPSourceSettings& settings, bool force)
@@ -937,13 +524,14 @@ void UDPSource::webapiReverseSendSettings(QList<QString>& channelSettingsKeys, c
m_networkRequest.setUrl(QUrl(channelSettingsURL));
m_networkRequest.setHeader(QNetworkRequest::ContentTypeHeader, "application/json");
QBuffer *buffer=new QBuffer();
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);
QNetworkReply *reply = m_networkManager->sendCustomRequest(m_networkRequest, "PATCH", buffer);
buffer->setParent(reply);
delete swgChannelSettings;
}
@@ -958,10 +546,18 @@ void UDPSource::networkManagerFinished(QNetworkReply *reply)
<< " error(" << (int) replyError
<< "): " << replyError
<< ": " << reply->errorString();
return;
}
else
{
QString answer = reply->readAll();
answer.chop(1); // remove last \n
qDebug("UDPSource::networkManagerFinished: reply:\n%s", answer.toStdString().c_str());
}
QString answer = reply->readAll();
answer.chop(1); // remove last \n
qDebug("UDPSource::networkManagerFinished: reply:\n%s", answer.toStdString().c_str());
reply->deleteLater();
}
void UDPSource::setLevelMeter(QObject *levelMeter)
{
connect(m_basebandSource, SIGNAL(levelChanged(qreal, qreal, int)), levelMeter, SLOT(levelChanged(qreal, qreal, int)));
}