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UDPSink buffer: implemented R/W pointer skew auto compensation optimization with average pulling

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This commit is contained in:
f4exb 2017-08-16 16:09:35 +02:00
parent 8f3473eede
commit c5343f4c99
4 changed files with 48 additions and 6 deletions
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37
plugins/channeltx/udpsink/udpsink.cpp
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@ -29,6 +29,8 @@ UDPSink::UDPSink(MessageQueue* uiMessageQueue, UDPSinkGUI* udpSinkGUI, BasebandS
m_spectrum(spectrum),
m_magsq(1e-10),
m_movingAverage(16, 0),
m_sampleRateSum(0),
m_sampleRateAvgCounter(0),
m_settingsMutex(QMutex::Recursive)
{
setObjectName("UDPSink");
@ -167,7 +169,38 @@ bool UDPSink::handleMessage(const Message& cmd)
{
UDPSinkMessages::MsgSampleRateCorrection& cfg = (UDPSinkMessages::MsgSampleRateCorrection&) cmd;
m_actualInputSampleRate += cfg.getCorrectionFactor() * m_actualInputSampleRate;
qDebug("UDPSink::handleMessage: MsgSampleRateCorrection: corr: %f new rate: %f", cfg.getCorrectionFactor(), m_actualInputSampleRate);
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("UDPSink::handleMessage: MsgSampleRateCorrection: corr: %f new rate: %f: avg rate: %f",
cfg.getCorrectionFactor(),
m_actualInputSampleRate,
avgRate);
m_actualInputSampleRate = avgRate;
m_sampleRateSum = 0.0;
m_sampleRateAvgCounter = 0;
}
else
{
qDebug("UDPSink::handleMessage: MsgSampleRateCorrection: corr: %f new rate: %f",
cfg.getCorrectionFactor(),
m_actualInputSampleRate);
}
m_settingsMutex.lock();
m_interpolatorDistanceRemain = 0;
@ -233,6 +266,8 @@ void UDPSink::apply(bool force)
m_interpolator.create(48, m_config.m_inputSampleRate, m_config.m_rfBandwidth / 2.2, 3.0);
m_actualInputSampleRate = m_config.m_inputSampleRate;
m_udpHandler.resetReadIndex();
m_sampleRateSum = 0.0;
m_sampleRateAvgCounter = 0;
m_settingsMutex.unlock();
}

4
plugins/channeltx/udpsink/udpsink.h
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@ -199,9 +199,13 @@ private:
UDPSinkUDPHandler m_udpHandler;
Real m_actualInputSampleRate; //!< sample rate with UDP buffer skew compensation
double m_sampleRateSum;
int m_sampleRateAvgCounter;
QMutex m_settingsMutex;
static const int m_sampleRateAverageItems = 17;
void apply(bool force);
void modulateSample();
};

11
plugins/channeltx/udpsink/udpsinkmsg.h
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@ -30,18 +30,21 @@ public:
public:
float getCorrectionFactor() const { return m_correctionFactor; }
float getRawDeltaRatio() const { return m_rawDeltaRatio; }
static MsgSampleRateCorrection* create(float correctionFactor)
static MsgSampleRateCorrection* create(float correctionFactor, float rawDeltaRatio)
{
return new MsgSampleRateCorrection(correctionFactor);
return new MsgSampleRateCorrection(correctionFactor, rawDeltaRatio);
}
private:
float m_correctionFactor;
float m_rawDeltaRatio;
MsgSampleRateCorrection(float correctionFactor) :
MsgSampleRateCorrection(float correctionFactor, float rawDeltaRatio) :
Message(),
m_correctionFactor(correctionFactor)
m_correctionFactor(correctionFactor),
m_rawDeltaRatio(rawDeltaRatio)
{ }
};
};

2
plugins/channeltx/udpsink/udpsinkudphandler.cpp
View File

@ -150,7 +150,7 @@ void UDPSinkUDPHandler::advanceReadPointer(int nbBytes)
float dd = d - m_d; // derivative
float c = (d / 15.0) + (dd / 20.0); // damping and scaling
c = c < -0.05 ? -0.05 : c > 0.05 ? 0.05 : c; // limit
UDPSinkMessages::MsgSampleRateCorrection *msg = UDPSinkMessages::MsgSampleRateCorrection::create(c);
UDPSinkMessages::MsgSampleRateCorrection *msg = UDPSinkMessages::MsgSampleRateCorrection::create(c, d);
if (m_feedbackMessageQueue) {
m_feedbackMessageQueue->push(msg);