use OpenGL for LLR and IQ Plots and fix UE LLR Plot

Using OpenGL for IQ and LLR Plots improves plotting time significantly!
Also use the correct length for UE CIR and UE LLR Plots.

openair1/PHY/TOOLS/nr_phy_qt_scope.cpp

@@ -357,6 +357,7 @@ void CIRPlotUE::timerEvent(QTimerEvent *event)
       maxY = std::max(maxY, value);
     }
 
+    this->axisX->setRange(-this->len / 2, this->len / 2);
     this->axisY->setMax(maxY);
     this->series->replace(points);
   }
@@ -368,6 +369,7 @@ LLRPlot::LLRPlot(int16_t *data, int len, int interval, PlotUpdater *plotUpdater)
 
   // add new series to the chart
   this->series = new QScatterSeries();
+  this->series->setUseOpenGL();
   this->series->setMarkerSize(3);
   this->series->setMarkerShape(QScatterSeries::MarkerShapeRectangle);
   this->series->setColor(Qt::blue);
@@ -440,6 +442,7 @@ void LLRPlotUE::timerEvent(QTimerEvent *event)
       maxY = std::max(maxY, abs(this->data[i]));
     }
 
+    this->axisX->setRange(0, this->len);
     this->axisY->setRange(-maxY, maxY);
     this->series->replace(points);
   }
@@ -451,6 +454,7 @@ IQPlot::IQPlot(complex16 *data, int len, int interval, PlotUpdater *plotUpdater)
 
   // add new series to the chart
   this->series = new QScatterSeries();
+  this->series->setUseOpenGL();
   this->series->setMarkerSize(3);
   this->series->setMarkerShape(QScatterSeries::MarkerShapeRectangle);
   this->series->setColor(Qt::blue);