changeset 1784:4eac4bf35b45

More graceful handling of failure to construct FFT models in the case where the source model has already been deleted before this occurs

--- a/data/model/FFTModel.cpp	Tue Sep 17 10:42:55 2019 +0100
+++ b/data/model/FFTModel.cpp	Tue Sep 17 11:21:33 2019 +0100
@@ -71,6 +71,8 @@
                 this, SIGNAL(modelChanged(ModelId)));
         connect(model.get(), SIGNAL(modelChangedWithin(ModelId, sv_frame_t, sv_frame_t)),
                 this, SIGNAL(modelChangedWithin(ModelId, sv_frame_t, sv_frame_t)));
+    } else {
+        m_error = QString("Model #%1 is not available").arg(m_model.untyped);
     }
 }
 
@@ -82,7 +84,15 @@
 FFTModel::isOK() const
 {
     auto model = ModelById::getAs<DenseTimeValueModel>(m_model);
-    return (model && model->isOK());
+    if (!model) {
+        m_error = QString("Model #%1 is not available").arg(m_model.untyped);
+        return false;
+    }
+    if (!model->isOK()) {
+        m_error = QString("Model #%1 is not OK").arg(m_model.untyped);
+        return false;
+    }
+    return true;
 }
 
 int

--- a/data/model/FFTModel.h	Tue Sep 17 10:42:55 2019 +0100
+++ b/data/model/FFTModel.h	Tue Sep 17 11:21:33 2019 +0100
@@ -78,7 +78,7 @@
     QString getBinName(int n) const override;
     bool shouldUseLogValueScale() const override { return true; }
     int getCompletion() const override;
-    virtual QString getError() const { return ""; } //!!!???
+    virtual QString getError() const { return m_error; }
     virtual sv_frame_t getFillExtent() const { return getEndFrame(); }
     QString toDelimitedDataString(QString, DataExportOptions,
                                   sv_frame_t, sv_frame_t) const override {
@@ -152,6 +152,7 @@
     Window<float> m_windower;
     mutable breakfastquay::FFT m_fft;
     double m_maximumFrequency;
+    mutable QString m_error;
     
     int getPeakPickWindowSize(PeakPickType type, sv_samplerate_t sampleRate,
                               int bin, double &dist) const;

--- a/transform/FeatureExtractionModelTransformer.cpp	Tue Sep 17 10:42:55 2019 +0100
+++ b/transform/FeatureExtractionModelTransformer.cpp	Tue Sep 17 11:21:33 2019 +0100
@@ -643,7 +643,7 @@
     while (!ready && !m_abandoned) {
         { // scope so as to release input shared_ptr before sleeping
             auto input = ModelById::getAs<DenseTimeValueModel>(inputId);
-            if (!input) {
+            if (!input || !input->isOK()) {
                 abandon();
                 return;
             }
@@ -717,9 +717,13 @@
                 for (int j = 0; in_range_for(m_outputNos, j); ++j) {
                     setCompletion(j, 100);
                 }
-                //!!! need a better way to handle this -- previously we were using a QMessageBox but that isn't an appropriate thing to do here either
                 SVDEBUG << "FeatureExtractionModelTransformer::run: Failed to create FFT model for input model " << inputId << ": " << err << endl;
-                throw AllocationFailed("Failed to create the FFT model for this feature extraction model transformer: error is: " + err);
+                m_message = "Failed to create the FFT model for this feature extraction model transformer: error is: " + err;
+                for (int cch = 0; cch < ch; ++cch) {
+                    delete fftModels[cch];
+                }
+                abandon();
+                return;
             }
             fftModels.push_back(model);
         }