SSB demod: implement level meter

plugins/channelrx/demodssb/ssbdemod.cpp

@@ -55,6 +55,10 @@ SSBDemod::SSBDemod(BasebandSampleSink* sampleSink) :
 
 	m_usb = true;
 	m_magsq = 0.0f;
+	m_magsqSum = 0.0f;
+	m_magsqPeak = 0.0f;
+	m_magsqCount = 0;
+
 	SSBFilter = new fftfilt(m_LowCutoff / m_audioSampleRate, m_Bandwidth / m_audioSampleRate, ssbFftLen);
 	DSBFilter = new fftfilt((2.0f * m_Bandwidth) / m_audioSampleRate, 2 * ssbFftLen);
 
@@ -132,6 +136,15 @@ void SSBDemod::feed(const SampleVector::const_iterator& begin, const SampleVecto
 				Real avgi = m_sum.imag() / decim;
 				m_magsq = (avgr * avgr + avgi * avgi) / (1<<30);
 
+                m_magsqSum += m_magsq;
+
+                if (m_magsq > m_magsqPeak)
+                {
+                    m_magsqPeak = m_magsq;
+                }
+
+                m_magsqCount++;
+
 				if (!m_dsb & !m_usb)
 				{ // invert spectrum for LSB
 					m_sampleBuffer.push_back(Sample(avgi, avgr));

plugins/channelrx/demodssb/ssbdemod.h

@@ -51,6 +51,17 @@ public:
 
 	Real getMagSq() const { return m_magsq; }
 
+    void getMagSqLevels(Real& avg, Real& peak, int& nbSamples)
+    {
+        avg = m_magsqSum / m_magsqCount;
+        m_magsq = avg;
+        peak = m_magsqPeak;
+        nbSamples = m_magsqCount;
+        m_magsqSum = 0.0f;
+        m_magsqPeak = 0.0f;
+        m_magsqCount = 0;
+    }
+
 private:
 	class MsgConfigureSSBDemod : public Message {
 		MESSAGE_CLASS_DECLARATION
@@ -128,6 +139,9 @@ private:
 	bool m_dsb;
 	bool m_audioMute;
     Real m_magsq;
+    Real m_magsqSum;
+    Real m_magsqPeak;
+    int  m_magsqCount;
 
 	NCO m_nco;
 	Interpolator m_interpolator;

plugins/channelrx/demodssb/ssbdemodgui.cpp

@@ -347,6 +347,7 @@ SSBDemodGUI::SSBDemodGUI(PluginAPI* pluginAPI, DeviceSourceAPI *deviceAPI, QWidg
 	m_deviceAPI->addThreadedSink(m_threadedChannelizer);
 
 	ui->deltaFrequency->setColorMapper(ColorMapper(ColorMapper::ReverseGold));
+	ui->channelPowerMeter->setColorTheme(LevelMeterSignalDB::ColorGreenAndBlue);
 
 	ui->glSpectrum->setCenterFrequency(m_rate/2);
 	ui->glSpectrum->setSampleRate(m_rate);
@@ -499,7 +500,16 @@ void SSBDemodGUI::enterEvent(QEvent*)
 
 void SSBDemodGUI::tick()
 {
-	Real powDb = CalcDb::dbPower(m_ssbDemod->getMagSq());
+    Real magsqAvg, magsqPeak;
-	m_channelPowerDbAvg.feed(powDb);
+    int nbMagsqSamples;
-	ui->channelPower->setText(QString::number(m_channelPowerDbAvg.average(), 'f', 1));
+    m_ssbDemod->getMagSqLevels(magsqAvg, magsqPeak, nbMagsqSamples);
+    Real powDbAvg = CalcDb::dbPower(magsqAvg);
+    Real powDbPeak = CalcDb::dbPower(magsqPeak);
+
+    ui->channelPowerMeter->levelChanged(
+            (100.0f + powDbAvg) / 100.0f,
+            (100.0f + powDbPeak) / 100.0f,
+            nbMagsqSamples);
+
+    ui->channelPower->setText(QString::number(powDbAvg, 'f', 1));
 }

plugins/channelrx/demodssb/ssbdemodgui.ui

@@ -219,6 +219,33 @@
       </item>
      </layout>
     </item>
+    <item>
+     <layout class="QHBoxLayout" name="channelPowerMeterLayout">
+      <item>
+       <widget class="QLabel" name="channelPowerMeterUnits">
+        <property name="text">
+         <string>dB</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="LevelMeterSignalDB" name="channelPowerMeter" native="true">
+        <property name="sizePolicy">
+         <sizepolicy hsizetype="Expanding" vsizetype="MinimumExpanding">
+          <horstretch>0</horstretch>
+          <verstretch>0</verstretch>
+         </sizepolicy>
+        </property>
+        <property name="minimumSize">
+         <size>
+          <width>0</width>
+          <height>30</height>
+         </size>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </item>
     <item>
      <layout class="QHBoxLayout" name="spanLayout">
       <item>
@@ -498,6 +525,12 @@
    <header>gui/glspectrumgui.h</header>
    <container>1</container>
   </customwidget>
+  <customwidget>
+   <class>LevelMeterSignalDB</class>
+   <extends>QWidget</extends>
+   <header>gui/levelmeter.h</header>
+   <container>1</container>
+  </customwidget>
  </customwidgets>
  <resources>
   <include location="../../../sdrbase/resources/res.qrc"/>

plugins/channelrx/demodssb/ssbplugin.cpp

@@ -7,7 +7,7 @@
 
 const PluginDescriptor SSBPlugin::m_pluginDescriptor = {
 	QString("SSB Demodulator"),
-	QString("2.1.1"),
+	QString("2.4.0"),
 	QString("(c) Edouard Griffiths, F4EXB"),
 	QString("https://github.com/f4exb/sdrangel"),
 	true,