comparison src/app/waveform/waveform.component.ts @ 68:f94a9bb319e3

Bail out of rendering if there are no features.

     // TODO refactor all of this
     switch (features.shape) {
       case 'vector': {
         const stepDuration = (features as FixedSpacedFeatures).stepDuration;
         const featureData = (features.data as Float32Array);
+        if (featureData.length === 0) return;
         const normalisationFactor = 1.0 /
           featureData.reduce(
             (currentMax, feature) => Math.max(currentMax, feature),
             -Infinity
           );

         ), colour);
         break;
       }
       case 'list': {
         const featureData = (features.data as FeatureList);
+        if (featureData.length === 0) return;
         // TODO look at output descriptor instead of directly inspecting features
         const hasDuration = outputDescriptor.configured.hasDuration;
         const isMarker = !hasDuration
           && outputDescriptor.configured.binCount === 0
           && featureData[0].featureValues == null;