Enhanced spectrum display: Histogram: define NO_AVX, wider decay range, make stroke and late holdoff adjustable. Added option to show live spectrum (had only max hold before)

Readme.md

@@ -107,16 +107,22 @@ Done since the fork
   - As a consequence of the above added more interesting values for the available sampling rates of the BladeRF plugin
   - Variable span for the SSB demod down to 1.5 kHz
   - Filter out CTCSS tones for audio and full CTCSS support in NFMDemod
-  - Enhancement of the NFM squelch
+  - Enhancement of the NFM squelch mimicking professional analog squelch circuits (based on balance between two AF filters)
   - Added a channel analyzer plugin focusing on measurement (DSA/DSO functionnality). Basic functions.
   - Added a scope widget in the channel analyzer plugin
+  - Channel analyzer bandwidth up to half the available RF (IF) bandwidth (was 48k fixed)
+  - Enhanced scope display and controls: scale display, better X (time) and Y scales control, grid fit to scale, effectively implementing triggers, trigger on magnitude and phase, properly handling time shift, ...
+  - Enhanced spectrum display: Histogram: define NO_AVX, wider decay range, make stroke and late holdoff adjustable. Added option to show live spectrum (had only max hold before).
+  - Enhanced channel analyzer: enhanced scope and spectrum displays as mentioned above, make the spectrum display synchronous to scope (hence triggerable a la E4406A).
     
 =====
 To Do
 =====
 
+  - Enhance presets management (Edit, Move, Import/Export from/to human readable format like JSON)
+  - Variable scope memory depth
+  - Level calibration
   - Enhance WFM (stereo, RDS?)
   - Even more demods ... 
-  - Triggering capability like on expensive spectrum analyzers to trap burst signals
   - recording capability
   - Tx channels for Rx/Tx boards like BladeRF

include-gpl/gui/glspectrum.h

@@ -38,10 +38,13 @@ public:
 	void setReferenceLevel(Real referenceLevel);
 	void setPowerRange(Real powerRange);
 	void setDecay(int decay);
+	void setHistoLateHoldoff(int lateHoldoff);
+	void setHistoStroke(int stroke);
 	void setDisplayWaterfall(bool display);
 	void setSsbSpectrum(bool ssbSpectrum);
 	void setInvertedWaterfall(bool inv);
 	void setDisplayMaxHold(bool display);
+	void setDisplayCurrent(bool display);
 	void setDisplayHistogram(bool display);
 	void setDisplayGrid(bool display);
 	void setDisplayGridIntensity(int intensity);
@@ -96,6 +99,8 @@ private:
 
 	std::vector<Real> m_maxHold;
 	bool m_displayMaxHold;
+	std::vector<Real> m_current;
+	bool m_displayCurrent;
 
 	Real m_waterfallShare;
 

include-gpl/gui/glspectrumgui.h

@@ -45,6 +45,7 @@ private:
 	bool m_displayWaterfall;
 	bool m_invertedWaterfall;
 	bool m_displayMaxHold;
+	bool m_displayCurrent;
 	bool m_displayHistogram;
 	bool m_displayGrid;
 	bool m_invert;
@@ -64,6 +65,7 @@ private slots:
 	void on_waterfall_toggled(bool checked);
 	void on_histogram_toggled(bool checked);
 	void on_maxHold_toggled(bool checked);
+	void on_current_toggled(bool checked);
 	void on_invert_toggled(bool checked);
 	void on_grid_toggled(bool checked);
 };

sdrbase/gui/glspectrum.cpp

@@ -36,6 +36,7 @@ GLSpectrum::GLSpectrum(QWidget* parent) :
 	m_displayGridIntensity(5),
 	m_invertedWaterfall(false),
 	m_displayMaxHold(false),
+	m_displayCurrent(false),
 	m_leftMarginTextureAllocated(false),
 	m_frequencyTextureAllocated(false),
 	m_waterfallBuffer(NULL),
@@ -86,6 +87,9 @@ GLSpectrum::GLSpectrum(QWidget* parent) :
 		((quint8*)&m_histogramPalette[i])[2] = c.blue();
 		((quint8*)&m_histogramPalette[i])[3] = c.alpha();
 	}
+
+	m_current.resize(m_fftSize);
+
 	m_histogramHoldoffBase = 1; // was 4
 	m_histogramHoldoffCount = m_histogramHoldoffBase;
 	m_histogramLateHoldoff = 1; // was 20
@@ -169,12 +173,30 @@ void GLSpectrum::setPowerRange(Real powerRange)
 void GLSpectrum::setDecay(int decay)
 {
 	m_decay = decay;
-	if(m_decay < -2)
-		m_decay = -2;
+	if(m_decay < 0)
+		m_decay = 0;
 	else if(m_decay > 10)
 		m_decay = 10;
 }
 
+void GLSpectrum::setHistoLateHoldoff(int lateHoldoff)
+{
+	m_histogramLateHoldoff = lateHoldoff;
+	if(m_histogramLateHoldoff < 0)
+		m_histogramLateHoldoff = 0;
+	else if(m_histogramLateHoldoff > 20)
+		m_histogramLateHoldoff = 20;
+}
+
+void GLSpectrum::setHistoStroke(int stroke)
+{
+	m_histogramStroke = stroke;
+	if(m_histogramStroke < 4)
+		m_histogramStroke = 4;
+	else if(m_histogramStroke > 240)
+		m_histogramStroke = 240;
+}
+
 void GLSpectrum::setSampleRate(qint32 sampleRate)
 {
 	m_sampleRate = sampleRate;
@@ -212,6 +234,18 @@ void GLSpectrum::setDisplayMaxHold(bool display)
 	update();
 }
 
+void GLSpectrum::setDisplayCurrent(bool display)
+{
+	if(display && (m_current.size() < (uint)m_fftSize)) {
+		m_current.resize(m_fftSize);
+	}
+
+	m_displayCurrent = display;
+	m_changesPending = true;
+	stopDrag();
+	update();
+}
+
 void GLSpectrum::setDisplayHistogram(bool display)
 {
 	m_displayHistogram = display;
@@ -333,12 +367,23 @@ void GLSpectrum::updateHistogram(const std::vector<Real>& spectrum)
 		m_histogramHoldoffCount = m_histogramHoldoffBase;
 	}
 
+	if(m_current.size() < (uint)m_fftSize)
+		m_current.resize(m_fftSize);
+
 #define NO_AVX
 #ifdef NO_AVX
 	for(int i = 0; i < m_fftSize; i++) {
 		int v = (int)((spectrum[i] - m_referenceLevel) * 100.0 / m_powerRange + 100.0);
 
-		if((v >= 0) && (v <= 99)) {
+		if (v < 0) {
+			m_current[i] = m_referenceLevel - m_powerRange;
+		}
+		else if (v > 99) {
+			m_current[i] = m_referenceLevel;
+		}
+		else {
+			//m_current[i] = m_referenceLevel - m_powerRange + (v * m_powerRange) / 99.0;
+			m_current[i] = spectrum[i];
 			b = m_histogram + i * 100 + v;
 			if(*b < 220)
 				*b += m_histogramStroke; // was 4
@@ -517,7 +562,7 @@ void GLSpectrum::paintGL()
 	}
 
 	// paint histogram
-	if(m_displayHistogram || m_displayMaxHold) {
+	if(m_displayHistogram || m_displayMaxHold || m_displayCurrent) {
 		glPushMatrix();
 		glTranslatef(m_glHistogramRect.x(), m_glHistogramRect.y(), 0);
 		glScalef(m_glHistogramRect.width(), m_glHistogramRect.height(), 1);
@@ -613,7 +658,7 @@ void GLSpectrum::paintGL()
 	}
 
 	// paint left scales (time and power)
-	if(m_displayWaterfall || m_displayMaxHold || m_displayHistogram ) {
+	if(m_displayWaterfall || m_displayMaxHold || m_displayCurrent || m_displayHistogram ) {
 		glBindTexture(GL_TEXTURE_2D, m_leftMarginTexture);
 		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
@@ -640,7 +685,7 @@ void GLSpectrum::paintGL()
 	}
 
 	// paint frequency scale
-	if(m_displayWaterfall || m_displayMaxHold || m_displayHistogram ) {
+	if(m_displayWaterfall || m_displayMaxHold || m_displayCurrent || m_displayHistogram ) {
 		glBindTexture(GL_TEXTURE_2D, m_frequencyTexture);
 		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
@@ -753,6 +798,31 @@ void GLSpectrum::paintGL()
 		glPopMatrix();
 	}
 
+	// paint current spectrum line on top of histogram
+	if(m_displayCurrent) {
+		glPushMatrix();
+		glTranslatef(m_glHistogramRect.x(), m_glHistogramRect.y(), 0);
+		glScalef(m_glHistogramRect.width() / (float)(m_fftSize - 1), -m_glHistogramRect.height() / m_powerRange, 1);
+		glEnable(GL_BLEND);
+		glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+		glEnable(GL_LINE_SMOOTH);
+		glLineWidth(1.0f);
+		glColor3f(1.0f, 1.0f, 0.25f); // intense yellow
+		Real bottom = -m_powerRange;
+		glBegin(GL_LINE_STRIP);
+		for(int i = 0; i < m_fftSize; i++) {
+			Real v = m_current[i] - m_referenceLevel;
+			if(v > 0)
+				v = 0;
+			else if(v < bottom)
+				v = bottom;
+			glVertex2f(i, v);
+		}
+		glEnd();
+		glDisable(GL_LINE_SMOOTH);
+		glPopMatrix();
+	}
+
 	// paint waterfall grid
 	if(m_displayWaterfall && m_displayGrid) {
 		glEnable(GL_BLEND);
@@ -800,7 +870,7 @@ void GLSpectrum::paintGL()
 	}
 
 	// paint histogram grid
-	if((m_displayHistogram || m_displayMaxHold) && (m_displayGrid)) {
+	if((m_displayHistogram || m_displayMaxHold || m_displayCurrent) && (m_displayGrid)) {
 		glEnable(GL_BLEND);
 		glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 		glLineWidth(1.0f);
@@ -881,7 +951,7 @@ void GLSpectrum::applyChanges()
 	int leftMargin;
 	int rightMargin = fm.width("000");
 
-	if(m_displayWaterfall && (m_displayHistogram | m_displayMaxHold))
+	if(m_displayWaterfall && (m_displayHistogram | m_displayMaxHold | m_displayCurrent))
 	{
 		waterfallHeight = height() * m_waterfallShare - 1;
 
@@ -1041,7 +1111,7 @@ void GLSpectrum::applyChanges()
 			(float)1
 		);
 	}
-	else if(m_displayHistogram || m_displayMaxHold)
+	else if(m_displayHistogram || m_displayMaxHold || m_displayCurrent)
 	{
 		bottomMargin = frequencyScaleHeight;
 		frequencyScaleTop = height() - bottomMargin;
@@ -1133,7 +1203,7 @@ void GLSpectrum::applyChanges()
 			1);
 		*/
 
-		if(m_displayHistogram || m_displayMaxHold || m_displayWaterfall) {
+		if(m_displayHistogram || m_displayMaxHold || m_displayCurrent || m_displayWaterfall) {
 			dv->m_rect.setRect(m_frequencyScale.getPosFromValue(xc) + leftMargin - 1,
 			topMargin,
 			5,
@@ -1170,7 +1240,7 @@ void GLSpectrum::applyChanges()
 					}
 				}
 			}
-			if(m_displayHistogram || m_displayMaxHold) {
+			if(m_displayHistogram || m_displayMaxHold || m_displayCurrent) {
 				tickList = &m_powerScale.getTickList();
 				for(int i = 0; i < tickList->count(); i++) {
 					tick = &(*tickList)[i];
@@ -1191,7 +1261,7 @@ void GLSpectrum::applyChanges()
 		m_leftMarginTextureAllocated = true;
 	}
 	// prepare frequency scale
-	if(m_displayWaterfall || m_displayHistogram || m_displayMaxHold){
+	if(m_displayWaterfall || m_displayHistogram || m_displayMaxHold || m_displayCurrent){
 		m_frequencyPixmap = QPixmap(width(), frequencyScaleHeight);
 		m_frequencyPixmap.fill(Qt::transparent);
 		{
@@ -1320,7 +1390,7 @@ void GLSpectrum::applyChanges()
 
 void GLSpectrum::mouseMoveEvent(QMouseEvent* event)
 {
-	if(m_displayWaterfall && (m_displayWaterfall || m_displayHistogram || m_displayMaxHold)) {
+	if(m_displayWaterfall && (m_displayWaterfall || m_displayHistogram || m_displayMaxHold || m_displayCurrent)) {
 		if(m_frequencyScaleRect.contains(event->pos())) {
 			if(m_cursorState == CSNormal) {
 				setCursor(Qt::SizeVerCursor);
@@ -1355,7 +1425,7 @@ void GLSpectrum::mouseMoveEvent(QMouseEvent* event)
 			m_channelMarkerStates[m_cursorChannel]->m_channelMarker->setCenterFrequency(freq);
 	}
 
-	if(m_displayWaterfall || m_displayHistogram || m_displayMaxHold) {
+	if(m_displayWaterfall || m_displayHistogram || m_displayMaxHold || m_displayCurrent) {
 		for(int i = 0; i < m_channelMarkerStates.size(); ++i) {
 			if(m_channelMarkerStates[i]->m_rect.contains(event->pos())) {
 				if(m_cursorState == CSNormal) {

sdrbase/gui/glspectrumgui.cpp

@@ -23,6 +23,7 @@ GLSpectrumGUI::GLSpectrumGUI(QWidget* parent) :
 	m_displayWaterfall(true),
 	m_invertedWaterfall(false),
 	m_displayMaxHold(false),
+	m_displayCurrent(false),
 	m_displayHistogram(false),
 	m_displayGrid(false),
 	m_invert(true)
@@ -85,6 +86,7 @@ QByteArray GLSpectrumGUI::serialize() const
 	s.writeS32(13, m_displayGridIntensity);
 	s.writeS32(14, m_histogramLateHoldoff);
 	s.writeS32(15, m_histogramStroke);
+	s.writeBool(16, m_displayCurrent);
 	return s.final();
 }
 
@@ -113,6 +115,7 @@ bool GLSpectrumGUI::deserialize(const QByteArray& data)
 		d.readS32(13, &m_displayGridIntensity, 0);
 		d.readS32(14, &m_histogramLateHoldoff, 1);
 		d.readS32(15, &m_histogramStroke, 40);
+		d.readBool(16, &m_displayCurrent, false);
 		applySettings();
 		return true;
 	} else {
@@ -137,6 +140,7 @@ void GLSpectrumGUI::applySettings()
 	ui->stroke->setSliderPosition(m_histogramStroke);
 	ui->waterfall->setChecked(m_displayWaterfall);
 	ui->maxHold->setChecked(m_displayMaxHold);
+	ui->current->setChecked(m_displayCurrent);
 	ui->histogram->setChecked(m_displayHistogram);
 	ui->invert->setChecked(m_invert);
 	ui->grid->setChecked(m_displayGrid);
@@ -150,8 +154,11 @@ void GLSpectrumGUI::applySettings()
 	m_glSpectrum->setDisplayWaterfall(m_displayWaterfall);
 	m_glSpectrum->setInvertedWaterfall(m_invertedWaterfall);
 	m_glSpectrum->setDisplayMaxHold(m_displayMaxHold);
+	m_glSpectrum->setDisplayCurrent(m_displayCurrent);
 	m_glSpectrum->setDisplayHistogram(m_displayHistogram);
 	m_glSpectrum->setDecay(m_decay);
+	m_glSpectrum->setHistoLateHoldoff(m_histogramLateHoldoff);
+	m_glSpectrum->setHistoStroke(m_histogramStroke);
 	m_glSpectrum->setInvertedWaterfall(m_invert);
 	m_glSpectrum->setDisplayGrid(m_displayGrid);
 	m_glSpectrum->setDisplayGridIntensity(m_displayGridIntensity);
@@ -198,13 +205,14 @@ void GLSpectrumGUI::on_decay_valueChanged(int index)
 
 void GLSpectrumGUI::on_holdoff_valueChanged(int index)
 {
-	if (index < 1) {
+	if (index < 0) {
 		return;
 	}
 	m_histogramLateHoldoff = index;
-	ui->holdoff->setToolTip(QString("Holdoff: %1").arg(m_histogramLateHoldoff));
-	if(m_glSpectrum != NULL)
-		m_glSpectrum->setDecay(m_decay);
+	//ui->holdoff->setToolTip(QString("Holdoff: %1").arg(m_histogramLateHoldoff));
+	if(m_glSpectrum != NULL) {
+		applySettings();
+	}
 }
 
 void GLSpectrumGUI::on_stroke_valueChanged(int index)
@@ -213,9 +221,10 @@ void GLSpectrumGUI::on_stroke_valueChanged(int index)
 		return;
 	}
 	m_histogramStroke = index;
-	ui->stroke->setToolTip(QString("Stroke: %1").arg(m_histogramStroke));
-	if(m_glSpectrum != NULL)
-		m_glSpectrum->setDecay(m_decay);
+	//ui->stroke->setToolTip(QString("Stroke: %1").arg(m_histogramStroke));
+	if(m_glSpectrum != NULL) {
+		applySettings();
+	}
 }
 
 void GLSpectrumGUI::on_waterfall_toggled(bool checked)
@@ -239,6 +248,13 @@ void GLSpectrumGUI::on_maxHold_toggled(bool checked)
 		m_glSpectrum->setDisplayMaxHold(m_displayMaxHold);
 }
 
+void GLSpectrumGUI::on_current_toggled(bool checked)
+{
+	m_displayCurrent = checked;
+	if(m_glSpectrum != NULL)
+		m_glSpectrum->setDisplayCurrent(m_displayCurrent);
+}
+
 void GLSpectrumGUI::on_invert_toggled(bool checked)
 {
 	m_invert = checked;

sdrbase/gui/glspectrumgui.ui

@@ -6,7 +6,7 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>234</width>
+    <width>273</width>
     <height>94</height>
    </rect>
   </property>
@@ -234,7 +234,7 @@
         <string>Decay:</string>
        </property>
        <property name="maximum">
-        <number>10</number>
+        <number>240</number>
        </property>
        <property name="pageStep">
         <number>1</number>
@@ -253,10 +253,10 @@
         <string>Holdoff:</string>
        </property>
        <property name="minimum">
-        <number>1</number>
+        <number>0</number>
        </property>
        <property name="maximum">
-        <number>100</number>
+        <number>20</number>
        </property>
        <property name="pageStep">
         <number>1</number>
@@ -278,7 +278,7 @@
         <number>4</number>
        </property>
        <property name="maximum">
-        <number>100</number>
+        <number>240</number>
        </property>
        <property name="pageStep">
         <number>1</number>
@@ -370,7 +370,7 @@
         </size>
        </property>
        <property name="toolTip">
-        <string>Display live spectrum</string>
+        <string>Display max hold</string>
        </property>
        <property name="text">
         <string>Max Hold</string>
@@ -390,6 +390,41 @@
        </property>
       </widget>
      </item>
+     <item>
+      <widget class="ButtonSwitch" name="current">
+       <property name="sizePolicy">
+        <sizepolicy hsizetype="MinimumExpanding" vsizetype="MinimumExpanding">
+         <horstretch>0</horstretch>
+         <verstretch>0</verstretch>
+        </sizepolicy>
+       </property>
+       <property name="minimumSize">
+        <size>
+         <width>24</width>
+         <height>24</height>
+        </size>
+       </property>
+       <property name="toolTip">
+        <string>Display live spectrum</string>
+       </property>
+       <property name="text">
+        <string>Max Hold</string>
+       </property>
+       <property name="icon">
+        <iconset resource="../resources/res.qrc">
+         <normaloff>:/current.png</normaloff>:/current.png</iconset>
+       </property>
+       <property name="iconSize">
+        <size>
+         <width>16</width>
+         <height>16</height>
+        </size>
+       </property>
+       <property name="checkable">
+        <bool>true</bool>
+       </property>
+      </widget>
+     </item>
      <item>
       <widget class="ButtonSwitch" name="invert">
        <property name="sizePolicy">

sdrbase/resources/res.qrc

@@ -22,5 +22,6 @@
         <file>display2_w.png</file>
         <file>horizontal_w.png</file>
         <file>vertical_w.png</file>
+        <file>current.png</file>
     </qresource>
 </RCC>