git.gag.com Git - debian/gnuradio/blob - gr-qtgui/src/lib/FrequencyDisplayPlot.cc

   1 #ifndef FREQUENCY_DISPLAY_PLOT_C
   2 #define FREQUENCY_DISPLAY_PLOT_C
   3
   4 #include <FrequencyDisplayPlot.h>
   5
   6 #include <qwt_scale_draw.h>
   7
   8 class FreqPrecisionClass
   9 {
  10 public:
  11   FreqPrecisionClass(const int freqPrecision)
  12   {
  13     _frequencyPrecision = freqPrecision;
  14   }
  15
  16   virtual ~FreqPrecisionClass()
  17   {
  18   }
  19
  20   virtual unsigned int GetFrequencyPrecision() const
  21   {
  22     return _frequencyPrecision;
  23   }
  24
  25   virtual void SetFrequencyPrecision(const unsigned int newPrecision)
  26   {
  27     _frequencyPrecision = newPrecision;
  28   }
  29 protected:
  30   unsigned int _frequencyPrecision;
  31
  32 private:
  33
  34 };
  35
  36 class FreqDisplayScaleDraw: public QwtScaleDraw, public FreqPrecisionClass
  37 {
  38 public:
  39   FreqDisplayScaleDraw(const unsigned int precision)
  40     : QwtScaleDraw(), FreqPrecisionClass(precision)
  41   {
  42   }
  43
  44   virtual ~FreqDisplayScaleDraw()
  45   {
  46   }
  47
  48   virtual QwtText label(double value) const
  49   {
  50     return QString("%1").arg(value, 0, 'f', GetFrequencyPrecision());
  51   }
  52
  53 protected:
  54
  55 private:
  56
  57 };
  58
  59 class FreqDisplayZoomer: public QwtPlotZoomer, public FreqPrecisionClass
  60 {
  61 public:
  62   FreqDisplayZoomer(QwtPlotCanvas* canvas, const unsigned int freqPrecision)
  63     : QwtPlotZoomer(canvas),FreqPrecisionClass(freqPrecision)
  64   {
  65     setTrackerMode(QwtPicker::AlwaysOn);
  66   }
  67
  68   virtual ~FreqDisplayZoomer(){
  69
  70   }
  71
  72   virtual void updateTrackerText(){
  73     updateDisplay();
  74   }
  75
  76 protected:
  77   virtual QwtText trackerText( const QwtDoublePoint& p ) const
  78   {
  79     QwtText t(QString("%1 %2, %3 dB").arg(p.x(), 0, 'f', GetFrequencyPrecision()).arg( (GetFrequencyPrecision() == 0) ? "Hz" : "kHz").arg(p.y(), 0, 'f', 2));
  80
  81     return t;
  82   }
  83 };
  84
  85 FrequencyDisplayPlot::FrequencyDisplayPlot(QWidget* parent)
  86   : QwtPlot(parent)
  87 {
  88   _startFrequency = 0;
  89   _stopFrequency = 4000;
  90
  91   timespec_reset(&_lastReplot);
  92
  93   resize(parent->width(), parent->height());
  94
  95   _displayIntervalTime = (1.0/10.0); // 1/10 of a second between updates
  96
  97   _useCenterFrequencyFlag = false;
  98
  99   _numPoints = 1024;
 100   _dataPoints = new double[_numPoints];
 101   _minFFTPoints = new double[_numPoints];
 102   _maxFFTPoints = new double[_numPoints];
 103   _xAxisPoints = new double[_numPoints];
 104
 105   // Disable polygon clipping
 106   QwtPainter::setDeviceClipping(false);
 107
 108   // We don't need the cache here
 109   canvas()->setPaintAttribute(QwtPlotCanvas::PaintCached, false);
 110   canvas()->setPaintAttribute(QwtPlotCanvas::PaintPacked, false);
 111
 112   QPalette palette;
 113   palette.setColor(canvas()->backgroundRole(), QColor("white"));
 114   canvas()->setPalette(palette);
 115
 116   setAxisScaleDraw(QwtPlot::xBottom, new FreqDisplayScaleDraw(0));
 117   setAxisScale(QwtPlot::xBottom, _startFrequency, _stopFrequency);
 118   setAxisTitle(QwtPlot::xBottom, "Frequency (Hz)");
 119
 120   setAxisScaleEngine(QwtPlot::yLeft, new QwtLinearScaleEngine);
 121   setAxisScale(QwtPlot::yLeft, -210, 5);
 122   setAxisTitle(QwtPlot::yLeft, "Power (dB)");
 123
 124   // Automatically deleted when parent is deleted
 125   _fft_plot_curve = new QwtPlotCurve("Power Spectrum");
 126   _fft_plot_curve->attach(this);
 127   _fft_plot_curve->setPen(QPen(Qt::blue));
 128   _fft_plot_curve->setRawData(_xAxisPoints, _dataPoints, _numPoints);
 129
 130   _min_fft_plot_curve = new QwtPlotCurve("Minimum Power");
 131   _min_fft_plot_curve->attach(this);
 132   _min_fft_plot_curve->setPen(QPen(Qt::magenta));
 133   _min_fft_plot_curve->setRawData(_xAxisPoints, _minFFTPoints, _numPoints);
 134   _min_fft_plot_curve->setVisible(false);
 135
 136   _max_fft_plot_curve = new QwtPlotCurve("Maximum Power");
 137   _max_fft_plot_curve->attach(this);
 138   _max_fft_plot_curve->setPen(QPen(Qt::darkYellow));
 139   _max_fft_plot_curve->setRawData(_xAxisPoints, _maxFFTPoints, _numPoints);
 140   _max_fft_plot_curve->setVisible(false);
 141
 142   _lower_intensity_marker = new QwtPlotMarker();
 143   _lower_intensity_marker->setLineStyle(QwtPlotMarker::HLine);
 144   _lower_intensity_marker->setLinePen(QPen(Qt::cyan));
 145   _lower_intensity_marker->attach(this);
 146
 147   _upper_intensity_marker = new QwtPlotMarker();
 148   _upper_intensity_marker->setLineStyle(QwtPlotMarker::HLine);
 149   _upper_intensity_marker->setLinePen(QPen(Qt::green));
 150   _upper_intensity_marker->attach(this);
 151
 152   memset(_dataPoints, 0x0, _numPoints*sizeof(double));
 153   memset(_xAxisPoints, 0x0, _numPoints*sizeof(double));
 154
 155   for(int64_t number = 0; number < _numPoints; number++){
 156     _minFFTPoints[number] = 200.0;
 157     _maxFFTPoints[number] = -280.0;
 158   }
 159
 160   _resetXAxisPoints();
 161
 162
 163   // set up peak marker
 164   QwtSymbol symbol;
 165
 166   _markerPeakAmplitude = new QwtPlotMarker();
 167   _markerPeakAmplitude->setLinePen(QPen(Qt::yellow));
 168   symbol.setStyle(QwtSymbol::Diamond);
 169   symbol.setSize(8);
 170   symbol.setPen(QPen(Qt::yellow));
 171   symbol.setBrush(QBrush(Qt::yellow));
 172   _markerPeakAmplitude->setSymbol(symbol);
 173   _markerPeakAmplitude->attach(this);
 174
 175   _markerNoiseFloorAmplitude = new QwtPlotMarker();
 176   _markerNoiseFloorAmplitude->setLineStyle(QwtPlotMarker::HLine);
 177   _markerNoiseFloorAmplitude->setLinePen(QPen(Qt::darkRed, 0, Qt::DotLine));
 178   _markerNoiseFloorAmplitude->attach(this);
 179
 180   _peakFrequency = 0;
 181   _peakAmplitude = -HUGE_VAL;
 182
 183   _noiseFloorAmplitude = -HUGE_VAL;
 184
 185   replot();
 186
 187   _zoomer = new FreqDisplayZoomer(canvas(), 0);
 188 #if QT_VERSION < 0x040000
 189   _zoomer->setMousePattern(QwtEventPattern::MouseSelect2,
 190                           Qt::RightButton, Qt::ControlModifier);
 191 #else
 192   _zoomer->setMousePattern(QwtEventPattern::MouseSelect2,
 193                           Qt::RightButton, Qt::ControlModifier);
 194 #endif
 195   _zoomer->setMousePattern(QwtEventPattern::MouseSelect3,
 196                           Qt::RightButton);
 197
 198   _panner = new QwtPlotPanner(canvas());
 199   _panner->setAxisEnabled(QwtPlot::yRight, false);
 200   _panner->setMouseButton(Qt::MidButton);
 201
 202   // Avoid jumping when labels with more/less digits
 203   // appear/disappear when scrolling vertically
 204
 205   const QFontMetrics fm(axisWidget(QwtPlot::yLeft)->font());
 206   QwtScaleDraw *sd = axisScaleDraw(QwtPlot::yLeft);
 207   sd->setMinimumExtent( fm.width("100.00") );
 208
 209   const QColor c(Qt::darkRed);
 210   _zoomer->setRubberBandPen(c);
 211   _zoomer->setTrackerPen(c);
 212 }
 213
 214 FrequencyDisplayPlot::~FrequencyDisplayPlot()
 215 {
 216   delete[] _dataPoints;
 217   delete[] _maxFFTPoints;
 218   delete[] _minFFTPoints;
 219   delete[] _xAxisPoints;
 220
 221   // _fft_plot_curves deleted when parent deleted
 222   // _zoomer and _panner deleted when parent deleted
 223 }
 224
 225 void
 226 FrequencyDisplayPlot::SetFrequencyRange(const double constStartFreq,
 227                                         const double constStopFreq,
 228                                         const double constCenterFreq,
 229                                         const bool useCenterFrequencyFlag,
 230                                         const double units, const std::string &strunits)
 231 {
 232   double startFreq = constStartFreq / units;
 233   double stopFreq = constStopFreq / units;
 234   double centerFreq = constCenterFreq / units;
 235
 236   _useCenterFrequencyFlag = useCenterFrequencyFlag;
 237
 238   if(_useCenterFrequencyFlag){
 239     startFreq = (startFreq + centerFreq);
 240     stopFreq = (stopFreq + centerFreq);
 241   }
 242
 243   _startFrequency = startFreq;
 244   _stopFrequency = stopFreq;
 245   _resetXAxisPoints();
 246
 247   setAxisScale(QwtPlot::xBottom, _startFrequency, _stopFrequency);
 248   setAxisScaleDraw(QwtPlot::xBottom, new FreqDisplayScaleDraw(2));
 249   setAxisTitle(QwtPlot::xBottom, QString("Frequency (%1)").arg(strunits.c_str()));
 250   ((FreqDisplayZoomer*)_zoomer)->SetFrequencyPrecision(2);
 251
 252   // Load up the new base zoom settings
 253   QwtDoubleRect newSize = _zoomer->zoomBase();
 254   newSize.setLeft(_startFrequency);
 255   newSize.setWidth(_stopFrequency-_startFrequency);
 256   _zoomer->setZoomBase(newSize);
 257
 258   // Zooms back to the base and clears any other zoom levels
 259   _zoomer->zoom(0);
 260 }
 261
 262
 263 double
 264 FrequencyDisplayPlot::GetStartFrequency() const
 265 {
 266   return _startFrequency;
 267 }
 268
 269 double
 270 FrequencyDisplayPlot::GetStopFrequency() const
 271 {
 272   return _stopFrequency;
 273 }
 274
 275 void
 276 FrequencyDisplayPlot::replot()
 277 {
 278   const timespec startTime = get_highres_clock();
 279
 280   _markerNoiseFloorAmplitude->setYValue(_noiseFloorAmplitude);
 281
 282   // Make sure to take into account the start frequency
 283   if(_useCenterFrequencyFlag){
 284     _markerPeakAmplitude->setXValue((_peakFrequency/1000.0) + _startFrequency);
 285   }
 286   else{
 287     _markerPeakAmplitude->setXValue(_peakFrequency + _startFrequency);
 288   }
 289   _markerPeakAmplitude->setYValue(_peakAmplitude);
 290
 291   QwtPlot::replot();
 292
 293   double differenceTime = (diff_timespec(get_highres_clock(), startTime));
 294
 295   differenceTime *= 99.0;
 296   // Require at least a 10% duty cycle
 297   if(differenceTime > (1.0/10.0)){
 298     _displayIntervalTime = differenceTime;
 299   }
 300 }
 301
 302 void
 303 FrequencyDisplayPlot::PlotNewData(const double* dataPoints, const int64_t numDataPoints,
 304                                   const double noiseFloorAmplitude, const double peakFrequency,
 305                                   const double peakAmplitude)
 306 {
 307   if(numDataPoints > 0){
 308
 309     if(numDataPoints != _numPoints){
 310       _numPoints = numDataPoints;
 311
 312       delete[] _dataPoints;
 313       delete[] _minFFTPoints;
 314       delete[] _maxFFTPoints;
 315       delete[] _xAxisPoints;
 316       _dataPoints = new double[_numPoints];
 317       _xAxisPoints = new double[_numPoints];
 318       _minFFTPoints = new double[_numPoints];
 319       _maxFFTPoints = new double[_numPoints];
 320
 321       _fft_plot_curve->setRawData(_xAxisPoints, _dataPoints, _numPoints);
 322       _min_fft_plot_curve->setRawData(_xAxisPoints, _minFFTPoints, _numPoints);
 323       _max_fft_plot_curve->setRawData(_xAxisPoints, _maxFFTPoints, _numPoints);
 324
 325       _resetXAxisPoints();
 326       ClearMaxData();
 327       ClearMinData();
 328     }
 329     memcpy(_dataPoints, dataPoints, numDataPoints*sizeof(double));
 330     for(int64_t point = 0; point < numDataPoints; point++){
 331       if(dataPoints[point] < _minFFTPoints[point]){
 332         _minFFTPoints[point] = dataPoints[point];
 333       }
 334       if(dataPoints[point] > _maxFFTPoints[point]){
 335         _maxFFTPoints[point] = dataPoints[point];
 336       }
 337     }
 338
 339     _noiseFloorAmplitude = noiseFloorAmplitude;
 340     _peakFrequency = peakFrequency;
 341     _peakAmplitude = peakAmplitude;
 342
 343   }
 344
 345   // Allow at least a 50% duty cycle
 346   if(diff_timespec(get_highres_clock(), _lastReplot) > _displayIntervalTime){
 347     // Only replot the screen if it is visible
 348     if(isVisible()){
 349       replot();
 350     }
 351     _lastReplot = get_highres_clock();
 352   }
 353 }
 354
 355 void
 356 FrequencyDisplayPlot::ClearMaxData()
 357 {
 358   for(int64_t number = 0; number < _numPoints; number++){
 359     _maxFFTPoints[number] = -280.0;
 360   }
 361 }
 362
 363 void
 364 FrequencyDisplayPlot::ClearMinData()
 365 {
 366   for(int64_t number = 0; number < _numPoints; number++){
 367     _minFFTPoints[number] = 200.0;
 368   }
 369 }
 370
 371 void
 372 FrequencyDisplayPlot::SetMaxFFTVisible(const bool visibleFlag)
 373 {
 374   _max_fft_plot_curve->setVisible(visibleFlag);
 375 }
 376
 377 void
 378 FrequencyDisplayPlot::SetMinFFTVisible(const bool visibleFlag)
 379 {
 380   _min_fft_plot_curve->setVisible(visibleFlag);
 381 }
 382
 383 void
 384 FrequencyDisplayPlot::_resetXAxisPoints()
 385 {
 386   double fft_bin_size = (_stopFrequency-_startFrequency) / static_cast<double>(_numPoints);
 387   double freqValue = _startFrequency;
 388   for(int64_t loc = 0; loc < _numPoints; loc++){
 389     _xAxisPoints[loc] = freqValue;
 390     freqValue += fft_bin_size;
 391   }
 392 }
 393
 394 void
 395 FrequencyDisplayPlot::SetLowerIntensityLevel(const double lowerIntensityLevel)
 396 {
 397   _lower_intensity_marker->setYValue( lowerIntensityLevel );
 398 }
 399
 400 void
 401 FrequencyDisplayPlot::SetUpperIntensityLevel(const double upperIntensityLevel)
 402 {
 403   _upper_intensity_marker->setYValue( upperIntensityLevel );
 404 }
 405
 406
 407 #endif /* FREQUENCY_DISPLAY_PLOT_C */