comparison src/Analyser.cpp @ 140:e7f2da26c9ac

Show warning if pitch-tracker plugin is not found (fixes #830)

 
 Analyser::~Analyser()
 {
 }
 
-void
+QString
 Analyser::newFileLoaded(Document *doc, WaveFileModel *model,
 			PaneStack *paneStack, Pane *pane)
 {
     m_document = doc;
     m_fileModel = model;
     m_paneStack = paneStack;
     m_pane = pane;
 
+    QString plugname = "pYIN";
     QString base = "vamp:pyin:pyin:";
     QString f0out = "smoothedpitchtrack";
     QString noteout = "notes";
 
     // We need at least one main-model layer (time ruler, waveform or

         lx->setBaseColour(ColourDatabase::getInstance()->getColourIndex(tr("Bright Red")));
         m_document->addLayerToView(m_pane, lx);
     }
 */
 
-    if (!tf->haveTransform(base + f0out) || !tf->haveTransform(base + noteout)) {
-        std::cerr << "ERROR: Analyser::newFileLoaded: Transform unknown" << std::endl;
-	return;
+    QString notFound = tr("Transform \"%1\" not found. Unable to analyse audio file.<br><br>Is the %2 Vamp plugin correctly installed?");
+    if (!tf->haveTransform(base + f0out)) {
+	return notFound.arg(base + f0out).arg(plugname);
+    }
+    if (!tf->haveTransform(base + noteout)) {
+	return notFound.arg(base + noteout).arg(plugname);
     }
 
     Transform t = tf->getDefaultTransformFor
         (base + f0out, m_fileModel->getSampleRate());
     t.setStepSize(256);

     loadState(Audio);
     loadState(PitchTrack);
     loadState(Notes);
 
     emit layersChanged();
+
+    return "";
 }
 
 void
 Analyser::getEnclosingSelectionScope(size_t f, size_t &f0, size_t &f1)
 {