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synced 2024-12-23 01:55:48 -05:00
Removed useless AGC clamping
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@ -90,7 +90,6 @@ FT8DemodSink::FT8DemodSink() :
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m_magsqCount = 0;
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m_agc.setThresholdEnable(false); // no squelch
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m_agc.setClamping(false); // no clamping
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SSBFilter = new fftfilt(m_LowCutoff / FT8DemodSettings::m_ft8SampleRate, m_Bandwidth / FT8DemodSettings::m_ft8SampleRate, m_ssbFftLen);
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@ -76,9 +76,6 @@ SSBDemodSink::SSBDemodSink() :
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m_magsqCur = 0.0;
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m_magsqPrev = 0.0;
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m_agc.setClampMax(SDR_RX_SCALED/100.0);
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m_agc.setClamping(m_agcClamping);
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SSBFilter = new fftfilt(m_LowCutoff / m_audioSampleRate, m_Bandwidth / m_audioSampleRate, m_ssbFftLen);
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DSBFilter = new fftfilt((2.0f * m_Bandwidth) / m_audioSampleRate, 2 * m_ssbFftLen);
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@ -473,7 +470,6 @@ void SSBDemodSink::applySettings(const SSBDemodSettings& settings, bool force)
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if (m_agcClamping != agcClamping)
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{
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m_agc.setClamping(agcClamping);
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m_agcClamping = agcClamping;
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}
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@ -91,9 +91,6 @@ UDPSinkSink::UDPSinkSink() :
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qWarning("UDPSinkSink::UDPSinkSink: cannot bind audio port");
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}
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m_agc.setClampMax(SDR_RX_SCALED*SDR_RX_SCALED);
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m_agc.setClamping(true);
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//DSPEngine::instance()->addAudioSink(&m_audioFifo);
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applyChannelSettings(m_channelSampleRate, m_channelFrequencyOffset, true);
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@ -338,7 +335,7 @@ void UDPSinkSink::audioReadyRead()
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uint res = m_audioFifo.write((const quint8*)&m_audioBuffer[0], m_audioBufferFill);
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if (res != m_audioBufferFill) {
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qDebug("UDPSinkSink::audioReadyRead: (mono) lost %u samples", m_audioBufferFill - res);
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qDebug("UDPSinkSink::audioReadyRead: (mono) lost %lu samples", m_audioBufferFill - res);
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}
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m_audioBufferFill = 0;
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@ -63,9 +63,7 @@ MagAGC::MagAGC(int historySize, double R, double threshold) :
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m_stepDownCounter(0),
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m_gateCounter(0),
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m_stepDownDelay(historySize),
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m_clamping(false),
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m_R2(R*R),
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m_clampMax(1.0),
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m_hardLimiting(false)
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{}
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@ -119,30 +117,7 @@ double MagAGC::feedAndGetValue(const Complex& ci)
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{
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m_magsq = ci.real()*ci.real() + ci.imag()*ci.imag();
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m_moving_average.feed(m_magsq);
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if (m_clamping)
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{
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if (m_squared)
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{
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if (m_magsq > m_clampMax) {
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m_u0 = m_clampMax / m_magsq;
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} else {
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m_u0 = m_R / m_moving_average.average();
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}
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}
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else
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{
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if (sqrt(m_magsq) > m_clampMax) {
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m_u0 = m_clampMax / sqrt(m_magsq);
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} else {
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m_u0 = m_R / sqrt(m_moving_average.average());
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}
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}
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}
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else
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{
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m_u0 = m_R / (m_squared ? m_moving_average.average() : sqrt(m_moving_average.average()));
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}
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if (m_thresholdEnable)
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{
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@ -59,8 +59,6 @@ public:
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void setThresholdEnable(bool enable);
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void setGate(int gate) { m_gate = gate; m_gateCounter = 0; m_count = 0; }
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void setStepDownDelay(int stepDownDelay) { m_stepDownDelay = stepDownDelay; m_gateCounter = 0; m_count = 0; }
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void setClamping(bool clamping) { m_clamping = clamping; }
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void setClampMax(double clampMax) { m_clampMax = clampMax; }
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int getStepDownDelay() const { return m_stepDownDelay; }
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float getStepValue() const;
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void setHardLimiting(bool hardLimiting) { m_hardLimiting = hardLimiting; }
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@ -78,9 +76,7 @@ private:
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int m_stepDownCounter; //!< step down transition samples counter
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int m_gateCounter; //!< threshold gate samples counter
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int m_stepDownDelay; //!< delay in samples before cutoff (release)
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bool m_clamping; //!< clamping active
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double m_R2; //!< square of ordered magnitude
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double m_clampMax; //!< maximum to clamp to as power value
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bool m_hardLimiting; //!< hard limit multiplier so that resulting sample magnitude does not exceed 1.0
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double hardLimiter(double multiplier, double magsq);
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