comparison layer/SpectrogramLayer.cpp @ 1473:886c1cd48f9d by-id

Further layer updates for ModelById

     m_normalizeVisibleArea(false),
     m_lastEmittedZoomStep(-1),
     m_synchronous(false),
     m_haveDetailedScale(false),
     m_exiting(false),
-    m_wholeCache(nullptr),
-    m_peakCache(nullptr),
     m_peakCacheDivisor(8)
 {
     QString colourConfigName = "spectrogram-colour";
     int colourConfigDefault = int(ColourMapper::Green);
     

 }
 
 void
 SpectrogramLayer::deleteDerivedModels()
 {
-    if (m_fftModel) m_fftModel->aboutToDelete();
-    if (m_peakCache) m_peakCache->aboutToDelete();
-    if (m_wholeCache) m_wholeCache->aboutToDelete();
-
-    delete m_fftModel;
-    delete m_peakCache;
-    delete m_wholeCache;
-
-    m_fftModel = nullptr;
-    m_peakCache = nullptr;
-    m_wholeCache = nullptr;
+    ModelById::release(m_fftModel);
+    ModelById::release(m_peakCache);
+    ModelById::release(m_wholeCache);
+
+    m_fftModel = {};
+    m_peakCache = {};
+    m_wholeCache = {};
 }
 
 pair<ColourScaleType, double>
 SpectrogramLayer::convertToColourScale(int value)
 {

 }
 
 double
 SpectrogramLayer::getEffectiveMinFrequency() const
 {
-    sv_samplerate_t sr = m_model->getSampleRate();
+    auto model = ModelById::getAs<DenseTimeValueModel>(m_model);
+    if (!model) return 0.0;
+    
+    sv_samplerate_t sr = model->getSampleRate();
     double minf = double(sr) / getFFTSize();
 
     if (m_minFrequency > 0.0) {
         int minbin = int((double(m_minFrequency) * getFFTSize()) / sr + 0.01);
         if (minbin < 1) minbin = 1;

 }
 
 double
 SpectrogramLayer::getEffectiveMaxFrequency() const
 {
-    sv_samplerate_t sr = m_model->getSampleRate();
+    auto model = ModelById::getAs<DenseTimeValueModel>(m_model);
+    if (!model) return 0.0;
+    
+    sv_samplerate_t sr = model->getSampleRate();
     double maxf = double(sr) / 2;
 
     if (m_maxFrequency > 0.0) {
         int maxbin = int((double(m_maxFrequency) * getFFTSize()) / sr + 0.1);
         if (maxbin > getFFTSize() / 2) maxbin = getFFTSize() / 2;

 }
 
 double
 SpectrogramLayer::getYForBin(const LayerGeometryProvider *v, double bin) const
 {
+    auto model = ModelById::getAs<DenseTimeValueModel>(m_model);
+    if (!model) return 0.0;
+    
     double minf = getEffectiveMinFrequency();
     double maxf = getEffectiveMaxFrequency();
     bool logarithmic = (m_binScale == BinScale::Log);
-    sv_samplerate_t sr = m_model->getSampleRate();
+    sv_samplerate_t sr = model->getSampleRate();
 
     double freq = (bin * sr) / getFFTSize();
     
     double y = v->getYForFrequency(freq, minf, maxf, logarithmic);
     

 }
 
 double
 SpectrogramLayer::getBinForY(const LayerGeometryProvider *v, double y) const
 {
-    sv_samplerate_t sr = m_model->getSampleRate();
+    auto model = ModelById::getAs<DenseTimeValueModel>(m_model);
+    if (!model) return 0.0;
+
+    sv_samplerate_t sr = model->getSampleRate();
     double minf = getEffectiveMinFrequency();
     double maxf = getEffectiveMaxFrequency();
 
     bool logarithmic = (m_binScale == BinScale::Log);
 

 }
 
 bool
 SpectrogramLayer::getXBinRange(LayerGeometryProvider *v, int x, double &s0, double &s1) const
 {
-    sv_frame_t modelStart = m_model->getStartFrame();
-    sv_frame_t modelEnd = m_model->getEndFrame();
+    auto model = ModelById::getAs<DenseTimeValueModel>(m_model);
+    if (!model) return false;
+
+    sv_frame_t modelStart = model->getStartFrame();
+    sv_frame_t modelEnd = model->getEndFrame();
 
     // Each pixel column covers an exact range of sample frames:
     sv_frame_t f0 = v->getFrameForX(x) - modelStart;
     sv_frame_t f1 = v->getFrameForX(x + 1) - modelStart - 1;
 

 }
  
 bool
 SpectrogramLayer::getXBinSourceRange(LayerGeometryProvider *v, int x, RealTime &min, RealTime &max) const
 {
+    auto model = ModelById::getAs<DenseTimeValueModel>(m_model);
+    if (!model) return false;
+
     double s0 = 0, s1 = 0;
     if (!getXBinRange(v, x, s0, s1)) return false;
     
     int s0i = int(s0 + 0.001);
     int s1i = int(s1);

     int windowIncrement = getWindowIncrement();
     int w0 = s0i * windowIncrement - (m_windowSize - windowIncrement)/2;
     int w1 = s1i * windowIncrement + windowIncrement +
         (m_windowSize - windowIncrement)/2 - 1;
     
-    min = RealTime::frame2RealTime(w0, m_model->getSampleRate());
-    max = RealTime::frame2RealTime(w1, m_model->getSampleRate());
+    min = RealTime::frame2RealTime(w0, model->getSampleRate());
+    max = RealTime::frame2RealTime(w1, model->getSampleRate());
     return true;
 }
 
 bool
 SpectrogramLayer::getYBinSourceRange(LayerGeometryProvider *v, int y, double &freqMin, double &freqMax)
 const
 {
+    auto model = ModelById::getAs<DenseTimeValueModel>(m_model);
+    if (!model) return false;
+
     double q0 = 0, q1 = 0;
     if (!getYBinRange(v, y, q0, q1)) return false;
 
     int q0i = int(q0 + 0.001);
     int q1i = int(q1);
 
-    sv_samplerate_t sr = m_model->getSampleRate();
+    sv_samplerate_t sr = model->getSampleRate();
 
     for (int q = q0i; q <= q1i; ++q) {
         if (q == q0i) freqMin = (sr * q) / getFFTSize();
         if (q == q1i) freqMax = (sr * (q+1)) / getFFTSize();
     }

 SpectrogramLayer::getAdjustedYBinSourceRange(LayerGeometryProvider *v, int x, int y,
                                              double &freqMin, double &freqMax,
                                              double &adjFreqMin, double &adjFreqMax)
 const
 {
-    if (!m_model || !m_model->isOK() || !m_model->isReady()) {
+    auto model = ModelById::getAs<DenseTimeValueModel>(m_model);
+    if (!model || !model->isOK() || !model->isReady()) {
         return false;
     }
 
-    FFTModel *fft = getFFTModel();
+    auto fft = ModelById::getAs<FFTModel>(m_fftModel);
     if (!fft) return false;
 
     double s0 = 0, s1 = 0;
     if (!getXBinRange(v, x, s0, s1)) return false;
 

     int s1i = int(s1);
 
     int q0i = int(q0 + 0.001);
     int q1i = int(q1);
 
-    sv_samplerate_t sr = m_model->getSampleRate();
+    sv_samplerate_t sr = model->getSampleRate();
 
     bool haveAdj = false;
 
     bool peaksOnly = (m_binDisplay == BinDisplay::PeakBins ||
                       m_binDisplay == BinDisplay::PeakFrequencies);

 bool
 SpectrogramLayer::getXYBinSourceRange(LayerGeometryProvider *v, int x, int y,
                                       double &min, double &max,
                                       double &phaseMin, double &phaseMax) const
 {
-    if (!m_model || !m_model->isOK() || !m_model->isReady()) {
+    auto model = ModelById::getAs<DenseTimeValueModel>(m_model);
+    if (!model || !model->isOK() || !model->isReady()) {
         return false;
     }
 
     double q0 = 0, q1 = 0;
     if (!getYBinRange(v, y, q0, q1)) return false;

     int s0i = int(s0 + 0.001);
     int s1i = int(s1);
 
     bool rv = false;
 
-    FFTModel *fft = getFFTModel();
+    auto fft = ModelById::getAs<FFTModel>(m_fftModel);
 
     if (fft) {
 
         int cw = fft->getWidth();
         int ch = fft->getHeight();

 void
 SpectrogramLayer::recreateFFTModel()
 {
     SVDEBUG << "SpectrogramLayer::recreateFFTModel called" << endl;
 
-    if (!m_model || !m_model->isOK()) {
-        emit sliceableModelReplaced(m_fftModel, nullptr);
-        deleteDerivedModels();
-        return;
-    }
-
-    if (m_fftModel) m_fftModel->aboutToDelete();
-    
-    if (m_peakCache) m_peakCache->aboutToDelete();
-    delete m_peakCache;
-    m_peakCache = nullptr;
-
-    if (m_wholeCache) m_wholeCache->aboutToDelete();
-    delete m_wholeCache;
-    m_wholeCache = nullptr;
-    
-    FFTModel *newModel = new FFTModel(m_model,
-                                      m_channel,
-                                      m_windowType,
-                                      m_windowSize,
-                                      getWindowIncrement(),
-                                      getFFTSize());
-
-    if (!newModel->isOK()) {
+    { // scope, avoid hanging on to this pointer
+        auto model = ModelById::getAs<DenseTimeValueModel>(m_model);
+        if (!model || !model->isOK()) {
+            deleteDerivedModels();
+            return;
+        }
+    }
+    
+    deleteDerivedModels();
+
+    auto newFFTModel = std::make_shared<FFTModel>(m_model,
+                                                  m_channel,
+                                                  m_windowType,
+                                                  m_windowSize,
+                                                  getWindowIncrement(),
+                                                  getFFTSize());
+
+    if (!newFFTModel->isOK()) {
         QMessageBox::critical
             (nullptr, tr("FFT cache failed"),
              tr("Failed to create the FFT model for this spectrogram.\n"
                 "There may be insufficient memory or disc space to continue."));
-        delete newModel;
-        delete m_fftModel;
-        m_fftModel = nullptr;
         return;
     }
 
-    FFTModel *oldModel = m_fftModel;
-    m_fftModel = newModel;
+    ModelById::add(newFFTModel);
+    m_fftModel = newFFTModel->getId();
 
     bool createWholeCache = false;
     checkCacheSpace(&m_peakCacheDivisor, &createWholeCache);
     
     if (createWholeCache) {
-        m_wholeCache = new Dense3DModelPeakCache(m_fftModel, 1);
-        m_peakCache = new Dense3DModelPeakCache(m_wholeCache, m_peakCacheDivisor);
+
+        auto whole = std::make_shared<Dense3DModelPeakCache>(m_fftModel, 1);
+        ModelById::add(whole);
+        m_wholeCache = whole->getId();
+
+        auto peaks = std::make_shared<Dense3DModelPeakCache>(m_wholeCache,
+                                                             m_peakCacheDivisor);
+        ModelById::add(peaks);
+        m_peakCache = peaks->getId();
+
     } else {
-        m_peakCache = new Dense3DModelPeakCache(m_fftModel, m_peakCacheDivisor);
-    }
-
-    emit sliceableModelReplaced(oldModel, m_fftModel);
-    delete oldModel;
+
+        auto peaks = std::make_shared<Dense3DModelPeakCache>(m_fftModel,
+                                                             m_peakCacheDivisor);
+        ModelById::add(peaks);
+        m_peakCache = peaks->getId();
+    }
 }
 
 void
 SpectrogramLayer::checkCacheSpace(int *suggestedPeakDivisor,
                                   bool *createWholeCache) const
 {
     *suggestedPeakDivisor = 8;
     *createWholeCache = false;
-    
-    if (!m_fftModel) return;
+
+    auto fftModel = ModelById::getAs<FFTModel>(m_fftModel);
+    if (!fftModel) return;
 
     size_t sz =
-        size_t(m_fftModel->getWidth()) *
-        size_t(m_fftModel->getHeight()) *
+        size_t(fftModel->getWidth()) *
+        size_t(fftModel->getHeight()) *
         sizeof(float);
 
     try {
         SVDEBUG << "Requesting advice from StorageAdviser on whether to create whole-model cache" << endl;
         // The lower amount here is the amount required for the

     } catch (const InsufficientDiscSpace &) {
         SVDEBUG << "Seems like a terrible idea to create whole-model cache" << endl;
     }
 }
 
-const Model *
+ModelId
 SpectrogramLayer::getSliceableModel() const
 {
     return m_fftModel;
 }
 

     
     if (m_renderers.find(viewId) == m_renderers.end()) {
 
         Colour3DPlotRenderer::Sources sources;
         sources.verticalBinLayer = this;
-        sources.fft = getFFTModel();
+        sources.fft = m_fftModel;
         sources.source = sources.fft;
-        if (m_peakCache) sources.peakCaches.push_back(m_peakCache);
-        if (m_wholeCache) sources.peakCaches.push_back(m_wholeCache);
+        if (!m_peakCache.isNone()) sources.peakCaches.push_back(m_peakCache);
+        if (!m_wholeCache.isNone()) sources.peakCaches.push_back(m_wholeCache);
 
         ColourScale::Parameters cparams;
         cparams.colourMap = m_colourMap;
         cparams.scaleType = m_colourScale;
         cparams.multiple = m_colourScaleMultiple;

     cerr << "SpectrogramLayer::paint() entering: m_model is " << m_model << ", zoom level is " << v->getZoomLevel() << endl;
     
     cerr << "SpectrogramLayer::paint(): rect is " << rect.x() << "," << rect.y() << " " << rect.width() << "x" << rect.height() << endl;
 #endif
 
-    if (!m_model || !m_model->isOK() || !m_model->isReady()) {
+    auto model = ModelById::getAs<DenseTimeValueModel>(m_model);
+    if (!model || !model->isOK() || !model->isReady()) {
         return;
     }
 
     paintWithRenderer(v, paint, rect);
 

 void
 SpectrogramLayer::illuminateLocalFeatures(LayerGeometryProvider *v, QPainter &paint) const
 {
     Profiler profiler("SpectrogramLayer::illuminateLocalFeatures");
 
+    auto model = ModelById::getAs<DenseTimeValueModel>(m_model);
+    
     QPoint localPos;
-    if (!v->shouldIlluminateLocalFeatures(this, localPos) || !m_model) {
+    if (!v->shouldIlluminateLocalFeatures(this, localPos) || !model) {
         return;
     }
 
 #ifdef DEBUG_SPECTROGRAM_REPAINT
     cerr << "SpectrogramLayer: illuminateLocalFeatures("

 }
 
 int
 SpectrogramLayer::getCompletion(LayerGeometryProvider *) const
 {
-    if (!m_fftModel) return 100;
-    int completion = m_fftModel->getCompletion();
+    auto fftModel = ModelById::getAs<FFTModel>(m_fftModel);
+    if (!fftModel) return 100;
+    int completion = fftModel->getCompletion();
 #ifdef DEBUG_SPECTROGRAM_REPAINT
     cerr << "SpectrogramLayer::getCompletion: completion = " << completion << endl;
 #endif
     return completion;
 }
 
 QString
 SpectrogramLayer::getError(LayerGeometryProvider *) const
 {
-    if (!m_fftModel) return "";
-    return m_fftModel->getError();
+    auto fftModel = ModelById::getAs<FFTModel>(m_fftModel);
+    if (!fftModel) return "";
+    return fftModel->getError();
 }
 
 bool
 SpectrogramLayer::getValueExtents(double &min, double &max,
                                   bool &logarithmic, QString &unit) const
 {
-    if (!m_model) return false;
-
-    sv_samplerate_t sr = m_model->getSampleRate();
+    auto model = ModelById::getAs<DenseTimeValueModel>(m_model);
+    if (!model) return false;
+
+    sv_samplerate_t sr = model->getSampleRate();
     min = double(sr) / getFFTSize();
     max = double(sr) / 2;
     
     logarithmic = (m_binScale == BinScale::Log);
     unit = "Hz";

 }    
 
 bool
 SpectrogramLayer::setDisplayExtents(double min, double max)
 {
-    if (!m_model) return false;
+    auto model = ModelById::getAs<DenseTimeValueModel>(m_model);
+    if (!model) return false;
 
 //    SVDEBUG << "SpectrogramLayer::setDisplayExtents: " << min << "->" << max << endl;
 
     if (min < 0) min = 0;
-    if (max > m_model->getSampleRate()/2.0) max = m_model->getSampleRate()/2.0;
+    if (max > model->getSampleRate()/2.0) max = model->getSampleRate()/2.0;
     
     int minf = int(lrint(min));
     int maxf = int(lrint(max));
 
     if (m_minFrequency == minf && m_maxFrequency == maxf) return true;

 bool
 SpectrogramLayer::getCrosshairExtents(LayerGeometryProvider *v, QPainter &paint,
                                       QPoint cursorPos,
                                       vector<QRect> &extents) const
 {
+    // Qt 5.13 deprecates QFontMetrics::width(), but its suggested
+    // replacement (horizontalAdvance) was only added in Qt 5.11
+    // which is too new for us
+#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
+
     QRect vertical(cursorPos.x() - 12, 0, 12, v->getPaintHeight());
     extents.push_back(vertical);
 
     QRect horizontal(0, cursorPos.y(), cursorPos.x(), 1);
     extents.push_back(horizontal);

 
 void
 SpectrogramLayer::paintCrosshairs(LayerGeometryProvider *v, QPainter &paint,
                                   QPoint cursorPos) const
 {
+    auto model = ModelById::getAs<DenseTimeValueModel>(m_model);
+    if (!model) return;
+
     paint.save();
     
     int sw = getVerticalScaleWidth(v, m_haveDetailedScale, paint);
 
     QFont fn = paint.font();

     paint.drawLine(0, cursorPos.y(), cursorPos.x() - 1, cursorPos.y());
     paint.drawLine(cursorPos.x(), 0, cursorPos.x(), v->getPaintHeight());
     
     double fundamental = getFrequencyForY(v, cursorPos.y());
 
-    PaintAssistant::drawVisibleText(v, paint,
-                       sw + 2,
-                       cursorPos.y() - 2,
-                       QString("%1 Hz").arg(fundamental),
-                       PaintAssistant::OutlinedText);
+    PaintAssistant::drawVisibleText
+        (v, paint,
+         sw + 2,
+         cursorPos.y() - 2,
+         QString("%1 Hz").arg(fundamental),
+         PaintAssistant::OutlinedText);
 
     if (Pitch::isFrequencyInMidiRange(fundamental)) {
         QString pitchLabel = Pitch::getPitchLabelForFrequency(fundamental);
-        PaintAssistant::drawVisibleText(v, paint,
-                           sw + 2,
-                           cursorPos.y() + paint.fontMetrics().ascent() + 2,
-                           pitchLabel,
-                           PaintAssistant::OutlinedText);
+        PaintAssistant::drawVisibleText
+            (v, paint,
+             sw + 2,
+             cursorPos.y() + paint.fontMetrics().ascent() + 2,
+             pitchLabel,
+             PaintAssistant::OutlinedText);
     }
 
     sv_frame_t frame = v->getFrameForX(cursorPos.x());
-    RealTime rt = RealTime::frame2RealTime(frame, m_model->getSampleRate());
+    RealTime rt = RealTime::frame2RealTime(frame, model->getSampleRate());
     QString rtLabel = QString("%1 s").arg(rt.toText(true).c_str());
     QString frameLabel = QString("%1").arg(frame);
-    PaintAssistant::drawVisibleText(v, paint,
-                       cursorPos.x() - paint.fontMetrics().width(frameLabel) - 2,
-                       v->getPaintHeight() - 2,
-                       frameLabel,
-                       PaintAssistant::OutlinedText);
-    PaintAssistant::drawVisibleText(v, paint,
-                       cursorPos.x() + 2,
-                       v->getPaintHeight() - 2,
-                       rtLabel,
-                       PaintAssistant::OutlinedText);
+    PaintAssistant::drawVisibleText
+        (v, paint,
+         cursorPos.x() - paint.fontMetrics().width(frameLabel) - 2,
+         v->getPaintHeight() - 2,
+         frameLabel,
+         PaintAssistant::OutlinedText);
+    PaintAssistant::drawVisibleText
+        (v, paint,
+         cursorPos.x() + 2,
+         v->getPaintHeight() - 2,
+         rtLabel,
+         PaintAssistant::OutlinedText);
 
     int harmonic = 2;
 
     while (harmonic < 100) {
 

 SpectrogramLayer::getFeatureDescription(LayerGeometryProvider *v, QPoint &pos) const
 {
     int x = pos.x();
     int y = pos.y();
 
-    if (!m_model || !m_model->isOK()) return "";
+    auto model = ModelById::getAs<DenseTimeValueModel>(m_model);
+    if (!model || !model->isOK()) return "";
 
     double magMin = 0, magMax = 0;
     double phaseMin = 0, phaseMax = 0;
     double freqMin = 0, freqMax = 0;
     double adjFreqMin = 0, adjFreqMax = 0;

 }
 
 int
 SpectrogramLayer::getVerticalScaleWidth(LayerGeometryProvider *, bool detailed, QPainter &paint) const
 {
-    if (!m_model || !m_model->isOK()) return 0;
+    auto model = ModelById::getAs<DenseTimeValueModel>(m_model);
+    if (!model || !model->isOK()) return 0;
 
     int cw = 0;
     if (detailed) cw = getColourScaleWidth(paint);
 
     int tw = paint.fontMetrics().width(QString("%1")
                                      .arg(m_maxFrequency > 0 ?
                                           m_maxFrequency - 1 :
-                                          m_model->getSampleRate() / 2));
+                                          model->getSampleRate() / 2));
 
     int fw = paint.fontMetrics().width(tr("43Hz"));
     if (tw < fw) tw = fw;
 
     int tickw = (m_binScale == BinScale::Log ? 10 : 4);

 
 void
 SpectrogramLayer::paintVerticalScale(LayerGeometryProvider *v, bool detailed,
                                      QPainter &paint, QRect rect) const
 {
-    if (!m_model || !m_model->isOK()) {
+    auto model = ModelById::getAs<DenseTimeValueModel>(m_model);
+    if (!model || !model->isOK()) {
         return;
     }
 
     Profiler profiler("SpectrogramLayer::paintVerticalScale");
 

 
     int tickw = (m_binScale == BinScale::Log ? 10 : 4);
     int pkw = (m_binScale == BinScale::Log ? 10 : 0);
 
     int bins = getFFTSize() / 2;
-    sv_samplerate_t sr = m_model->getSampleRate();
+    sv_samplerate_t sr = model->getSampleRate();
 
     if (m_maxFrequency > 0) {
         bins = int((double(m_maxFrequency) * getFFTSize()) / sr + 0.1);
         if (bins > getFFTSize() / 2) bins = getFFTSize() / 2;
     }

 };
 
 int
 SpectrogramLayer::getVerticalZoomSteps(int &defaultStep) const
 {
-    if (!m_model) return 0;
-
-    sv_samplerate_t sr = m_model->getSampleRate();
+    auto model = ModelById::getAs<DenseTimeValueModel>(m_model);
+    if (!model) return 0;
+
+    sv_samplerate_t sr = model->getSampleRate();
 
     SpectrogramRangeMapper mapper(sr, getFFTSize());
 
 //    int maxStep = mapper.getPositionForValue((double(sr) / getFFTSize()) + 0.001);
     int maxStep = mapper.getPositionForValue(0);

 }
 
 int
 SpectrogramLayer::getCurrentVerticalZoomStep() const
 {
-    if (!m_model) return 0;
+    auto model = ModelById::getAs<DenseTimeValueModel>(m_model);
+    if (!model) return 0;
 
     double dmin, dmax;
     getDisplayExtents(dmin, dmax);
     
-    SpectrogramRangeMapper mapper(m_model->getSampleRate(), getFFTSize());
+    SpectrogramRangeMapper mapper(model->getSampleRate(), getFFTSize());
     int n = mapper.getPositionForValue(dmax - dmin);
 //    SVDEBUG << "SpectrogramLayer::getCurrentVerticalZoomStep: " << n << endl;
     return n;
 }
 
 void
 SpectrogramLayer::setVerticalZoomStep(int step)
 {
-    if (!m_model) return;
+    auto model = ModelById::getAs<DenseTimeValueModel>(m_model);
+    if (!model) return;
 
     double dmin = m_minFrequency, dmax = m_maxFrequency;
 //    getDisplayExtents(dmin, dmax);
 
 //    cerr << "current range " << dmin << " -> " << dmax << ", range " << dmax-dmin << ", mid " << (dmax + dmin)/2 << endl;
     
-    sv_samplerate_t sr = m_model->getSampleRate();
+    sv_samplerate_t sr = model->getSampleRate();
     SpectrogramRangeMapper mapper(sr, getFFTSize());
     double newdist = mapper.getValueForPosition(step);
 
     double newmin, newmax;
 

 }
 
 RangeMapper *
 SpectrogramLayer::getNewVerticalZoomRangeMapper() const
 {
-    if (!m_model) return nullptr;
-    return new SpectrogramRangeMapper(m_model->getSampleRate(), getFFTSize());
+    auto model = ModelById::getAs<DenseTimeValueModel>(m_model);
+    if (!model) return nullptr;
+    return new SpectrogramRangeMapper(model->getSampleRate(), getFFTSize());
 }
 
 void
 SpectrogramLayer::updateMeasureRectYCoords(LayerGeometryProvider *v, const MeasureRect &r) const
 {