SSB demod: binaural option

Readme.md

@@ -19,7 +19,7 @@ These plugins come from the parent code base and have been maintained so that th
 
 - Channels:
   - lora
-  - tcpsrc
+  - tcpsrc (although it has evolved please use the udpsrc plugin instead)
 
 <h2>Unsupported plugins</h2>
 
@@ -180,6 +180,9 @@ For Debian Jessie or Stretch:
   - Scope: trigger countdown
   - Scope: multiple trigger chaining
   - Scope: new mode with linear IQ (two traces) on the primary display and polar IQ on the secondary display
+  - New USB source plugin to connect to an external demodulator (ex: GNU radio) via USB ports
+  - Binaural option for SSB demod
+  - DSB option for SSB
   
 <h2>Major redesign</h2>
 

plugins/channel/ssb/ssbdemod.cpp

@@ -29,7 +29,8 @@ MESSAGE_CLASS_DEFINITION(SSBDemod::MsgConfigureSSBDemod, Message)
 SSBDemod::SSBDemod(SampleSink* sampleSink) :
 	m_sampleSink(sampleSink),
 	m_audioFifo(4, 24000),
-	m_settingsMutex(QMutex::Recursive)
+	m_settingsMutex(QMutex::Recursive),
+	m_audioBinaual(false)
 {
 	setObjectName("SSBDemod");
 
@@ -66,9 +67,14 @@ SSBDemod::~SSBDemod()
 	DSPEngine::instance()->removeAudioSink(&m_audioFifo);
 }
 
-void SSBDemod::configure(MessageQueue* messageQueue, Real Bandwidth, Real LowCutoff, Real volume, int spanLog2)
+void SSBDemod::configure(MessageQueue* messageQueue,
+		Real Bandwidth,
+		Real LowCutoff,
+		Real volume,
+		int spanLog2,
+		bool audioBinaural)
 {
-	Message* cmd = MsgConfigureSSBDemod::create(Bandwidth, LowCutoff, volume, spanLog2);
+	Message* cmd = MsgConfigureSSBDemod::create(Bandwidth, LowCutoff, volume, spanLog2, audioBinaural);
 	messageQueue->push(cmd);
 }
 
@@ -102,9 +108,6 @@ void SSBDemod::feed(const SampleVector::const_iterator& begin, const SampleVecto
 
 		for (int i = 0; i < n_out; i++)
 		{
-			//Real demod = (sideband[i].real() + sideband[i].imag()) * 0.7 * 32768.0;
-			Real demod = (sideband[i].real() + sideband[i].imag()) * 0.7;
-
 			// Downsample by 2^(m_scaleLog2 - 1) for SSB band spectrum display
 			// smart decimation with bit gain using float arithmetic (23 bits significand)
 
@@ -122,9 +125,19 @@ void SSBDemod::feed(const SampleVector::const_iterator& begin, const SampleVecto
 				sum.imag() = 0.0;
 			}
 
+			if (m_audioBinaual)
+			{
+				m_audioBuffer[m_audioBufferFill].r = (qint16)(sideband[i].real() * m_volume * 100);
+				m_audioBuffer[m_audioBufferFill].l = (qint16)(sideband[i].imag() * m_volume * 100);
+			}
+			else
+			{
+				Real demod = (sideband[i].real() + sideband[i].imag()) * 0.7;
 				qint16 sample = (qint16)(demod * m_volume * 100);
 				m_audioBuffer[m_audioBufferFill].l = sample;
 				m_audioBuffer[m_audioBufferFill].r = sample;
+			}
+
 			++m_audioBufferFill;
 
 			if (m_audioBufferFill >= m_audioBuffer.size())
@@ -220,13 +233,15 @@ bool SSBDemod::handleMessage(const Message& cmd)
 		m_volume *= m_volume * 0.1;
 
 		m_spanLog2 = cfg.getSpanLog2();
+		m_audioBinaual = cfg.getAudioBinaural();
 
 		m_settingsMutex.unlock();
 
-		qDebug() << "  - MsgConfigureSSBDemod: m_Bandwidth: " << m_Bandwidth
+		qDebug() << "SBDemod::handleMessage: MsgConfigureSSBDemod: m_Bandwidth: " << m_Bandwidth
 				<< " m_LowCutoff: " << m_LowCutoff
 				<< " m_volume: " << m_volume
-				<< " m_spanLog2: " << m_spanLog2;
+				<< " m_spanLog2: " << m_spanLog2
+				<< " m_audioBinaual: " << m_audioBinaual;
 
 		return true;
 	}

plugins/channel/ssb/ssbdemod.h

@@ -34,7 +34,12 @@ public:
 	SSBDemod(SampleSink* sampleSink);
 	virtual ~SSBDemod();
 
-	void configure(MessageQueue* messageQueue, Real Bandwidth, Real LowCutoff, Real volume, int spanLog2);
+	void configure(MessageQueue* messageQueue,
+			Real Bandwidth,
+			Real LowCutoff,
+			Real volume,
+			int spanLog2,
+			bool audioBinaural);
 
 	virtual void feed(const SampleVector::const_iterator& begin, const SampleVector::const_iterator& end, bool positiveOnly);
 	virtual void start();
@@ -52,10 +57,15 @@ private:
 		Real getLoCutoff() const { return m_LowCutoff; }
 		Real getVolume() const { return m_volume; }
 		int  getSpanLog2() const { return m_spanLog2; }
+		bool getAudioBinaural() const { return m_audioBinaural; }
 
-		static MsgConfigureSSBDemod* create(Real Bandwidth, Real LowCutoff, Real volume, int spanLog2)
+		static MsgConfigureSSBDemod* create(Real Bandwidth,
+				Real LowCutoff,
+				Real volume,
+				int spanLog2,
+				bool audioBinaural)
 		{
-			return new MsgConfigureSSBDemod(Bandwidth, LowCutoff, volume, spanLog2);
+			return new MsgConfigureSSBDemod(Bandwidth, LowCutoff, volume, spanLog2, audioBinaural);
 		}
 
 	private:
@@ -63,13 +73,19 @@ private:
 		Real m_LowCutoff;
 		Real m_volume;
 		int  m_spanLog2;
+		bool m_audioBinaural;
 
-		MsgConfigureSSBDemod(Real Bandwidth, Real LowCutoff, Real volume, int spanLog2) :
+		MsgConfigureSSBDemod(Real Bandwidth,
+				Real LowCutoff,
+				Real volume,
+				int spanLog2,
+				bool audioBinaural) :
 			Message(),
 			m_Bandwidth(Bandwidth),
 			m_LowCutoff(LowCutoff),
 			m_volume(volume),
-			m_spanLog2(spanLog2)
+			m_spanLog2(spanLog2),
+			m_audioBinaural(audioBinaural)
 		{ }
 	};
 
@@ -77,6 +93,7 @@ private:
 		qint16 l;
 		qint16 r;
 	};
+
 	typedef std::vector<AudioSample> AudioVector;
 
 	Real m_Bandwidth;
@@ -86,6 +103,7 @@ private:
 	int m_undersampleCount;
 	int m_sampleRate;
 	int m_frequency;
+	bool m_audioBinaual;
 	bool m_usb;
 	Real m_magsq;
 

plugins/channel/ssb/ssbdemodgui.cpp

@@ -71,6 +71,7 @@ QByteArray SSBDemodGUI::serialize() const
 	s.writeU32(5, m_channelMarker.getColor().rgb());
 	s.writeS32(6, ui->lowCut->value());
 	s.writeS32(7, ui->spanLog2->value());
+	s.writeBool(8, m_audioBinaural);
 	return s.final();
 }
 
@@ -108,6 +109,8 @@ bool SSBDemodGUI::deserialize(const QByteArray& data)
 		d.readS32(7, &tmp, 20);
 		ui->spanLog2->setValue(tmp);
 		setNewRate(tmp);
+		d.readBool(8, &m_audioBinaural);
+		ui->audioBinaural->setChecked(m_audioBinaural);
         
 		blockApplySettings(false);
 	    m_channelMarker.blockSignals(false);
@@ -143,6 +146,12 @@ void SSBDemodGUI::on_deltaMinus_toggled(bool minus)
 	}
 }
 
+void SSBDemodGUI::on_audioBinaural_toggled(bool binaural)
+{
+	m_audioBinaural = binaural;
+	applySettings();
+}
+
 void SSBDemodGUI::on_deltaFrequency_changed(quint64 value)
 {
 	if (ui->deltaMinus->isChecked())
@@ -257,6 +266,7 @@ SSBDemodGUI::SSBDemodGUI(PluginAPI* pluginAPI, QWidget* parent) :
 	m_doApplySettings(true),
 	m_rate(6000),
 	m_spanLog2(3),
+	m_audioBinaural(false),
 	m_channelPowerDbAvg(20,0)
 {
 	ui->setupUi(this);
@@ -374,7 +384,8 @@ void SSBDemodGUI::applySettings()
 			ui->BW->value() * 100.0,
 			ui->lowCut->value() * 100.0,
 			ui->volume->value() / 10.0,
-			m_spanLog2);
+			m_spanLog2,
+			m_audioBinaural);
 	}
 }
 

plugins/channel/ssb/ssbdemodgui.h

@@ -40,6 +40,7 @@ private slots:
 	void viewChanged();
 	void on_deltaFrequency_changed(quint64 value);
 	void on_deltaMinus_toggled(bool minus);
+	void on_audioBinaural_toggled(bool binaural);
 	void on_BW_valueChanged(int value);
 	void on_lowCut_valueChanged(int value);
 	void on_volume_valueChanged(int value);
@@ -56,6 +57,7 @@ private:
 	bool m_doApplySettings;
 	int m_rate;
 	int m_spanLog2;
+	bool m_audioBinaural;
 	MovingAverage<Real> m_channelPowerDbAvg;
 
 	ThreadedSampleSink* m_threadedChannelizer;

plugins/channel/ssb/ssbdemodgui.ui

@@ -7,7 +7,7 @@
     <x>0</x>
     <y>0</y>
     <width>302</width>
-    <height>544</height>
+    <height>483</height>
    </rect>
   </property>
   <property name="minimumSize">
@@ -25,7 +25,7 @@
      <x>5</x>
      <y>35</y>
      <width>281</width>
-     <height>349</height>
+     <height>151</height>
     </rect>
    </property>
    <property name="windowTitle">
@@ -142,6 +142,24 @@
           </property>
          </widget>
         </item>
+        <item>
+         <widget class="QToolButton" name="audioBinaural">
+          <property name="toolTip">
+           <string>Binaural audio</string>
+          </property>
+          <property name="text">
+           <string>...</string>
+          </property>
+          <property name="icon">
+           <iconset resource="../../../sdrbase/resources/res.qrc">
+            <normaloff>:/mono.png</normaloff>
+            <normalon>:/stereo.png</normalon>:/mono.png</iconset>
+          </property>
+          <property name="checkable">
+           <bool>true</bool>
+          </property>
+         </widget>
+        </item>
        </layout>
       </item>
      </layout>
@@ -332,8 +350,8 @@
   <widget class="QWidget" name="spectrumContainer" native="true">
    <property name="geometry">
     <rect>
-     <x>30</x>
+     <x>40</x>
-     <y>390</y>
+     <y>190</y>
      <width>218</width>
      <height>284</height>
     </rect>
@@ -380,12 +398,6 @@
   </widget>
  </widget>
  <customwidgets>
-  <customwidget>
-   <class>RollupWidget</class>
-   <extends>QWidget</extends>
-   <header>gui/rollupwidget.h</header>
-   <container>1</container>
-  </customwidget>
   <customwidget>
    <class>ValueDial</class>
    <extends>QWidget</extends>
@@ -404,6 +416,12 @@
    <header>gui/glspectrumgui.h</header>
    <container>1</container>
   </customwidget>
+  <customwidget>
+   <class>RollupWidget</class>
+   <extends>QWidget</extends>
+   <header>gui/rollupwidget.h</header>
+   <container>1</container>
+  </customwidget>
  </customwidgets>
  <resources>
   <include location="../../../sdrbase/resources/res.qrc"/>