Added export/import PSD curves data

Author: demvlad

src/graph_spectrum.js

@@ -442,4 +442,3 @@ export function FlightLogAnalyser(flightLog, canvas, analyserCanvas) {
     console.error(`Failed to create analyser... error: ${e}`);
   }
 }
-

src/graph_spectrum_calc.js

@@ -130,8 +130,8 @@ GraphSpectrumCalc.dataLoadPSD = function(analyserZoomY) {
   const psdData = {
     fieldIndex   : this._dataBuffer.fieldIndex,
     fieldName  : this._dataBuffer.fieldName,
-    psdLength  : psd.psdOutput.length,
-    psdOutput  : psd.psdOutput,
+    fftLength  : psd.psdOutput.length,
+    fftOutput  : psd.psdOutput,
     blackBoxRate : this._blackBoxRate,
     minimum: psd.min,
     maximum: psd.max,

src/graph_spectrum_plot.js

@@ -143,13 +143,6 @@ GraphSpectrumPlot.redraw = function () {
   GraphSpectrumPlot.draw();
 };
 
-GraphSpectrumPlot.clearImportedSpectrums = function (curvesData) {
-  this._importedSpectrumsData.length = 0;
-  this._invalidateCache();
-  this._invalidateDataCache();
-  GraphSpectrumPlot.draw();
-};
-
 GraphSpectrumPlot.setOverdraw = function (overdrawType) {
   this._overdrawType = overdrawType;
   this._invalidateCache();
@@ -344,7 +337,7 @@ GraphSpectrumPlot._drawPowerSpectralDensityGraph = function (canvasCtx) {
   canvasCtx.translate(LEFT, TOP);
   this._drawGradientBackground(canvasCtx, WIDTH, HEIGHT);
 
-  const pointsCount = this._fftData.psdLength;
+  const pointsCount = this._fftData.fftLength;
   const scaleX = 2 * WIDTH / PLOTTED_BLACKBOX_RATE * this._zoomX;
   canvasCtx.beginPath();
   canvasCtx.lineWidth = 1;
@@ -367,7 +360,7 @@ GraphSpectrumPlot._drawPowerSpectralDensityGraph = function (canvasCtx) {
   canvasCtx.moveTo(0, 0);
   for (let pointNum = 0; pointNum < pointsCount; pointNum++) {
     const freq = PLOTTED_BLACKBOX_RATE / 2 * pointNum / pointsCount;
-    const y = HEIGHT - (this._fftData.psdOutput[pointNum] - minY) * scaleY;
+    const y = HEIGHT - (this._fftData.fftOutput[pointNum] - minY) * scaleY;
     canvasCtx.lineTo(freq * scaleX, y);
   }
   canvasCtx.stroke();
@@ -440,10 +433,10 @@ GraphSpectrumPlot._drawLegend = function (canvasCtx, WIDTH, HEIGHT, importedCurv
   }
 }
 GraphSpectrumPlot.getPSDbyFreq  = function(frequency) {
-  let freqIndex = Math.round(2 * frequency / this._fftData.blackBoxRate * (this._fftData.psdOutput.length - 1) );
-  freqIndex = Math.min(freqIndex, this._fftData.psdOutput.length - 1);
+  let freqIndex = Math.round(2 * frequency / this._fftData.blackBoxRate * (this._fftData.fftOutput.length - 1) );
+  freqIndex = Math.min(freqIndex, this._fftData.fftOutput.length - 1);
   freqIndex = Math.max(freqIndex, 0);
-  return this._fftData.psdOutput.length ? this._fftData.psdOutput[freqIndex] : 0;
+  return this._fftData.fftOutput.length ? this._fftData.fftOutput[freqIndex] : 0;
 };
 
 GraphSpectrumPlot._drawFrequencyVsXGraph = function (canvasCtx, drawPSD = false) {

src/main.js

@@ -1149,11 +1149,17 @@ function BlackboxLogViewer() {
     CsvExporter(flightLog, options).dump(onSuccess);
   }
 
-  function exportSpectrumToCsv(file, options = {}) {
+  function exportSpectrumToCsv(options = {}) {
+    const fileName = graph.getAnalyser().getExportedFileName();
+    if (fileName == null) {
+      console.warn("The export is not supported for this spectrum type");
+      return;
+    }
+
     const onSuccess = createExportCallback(
       "csv",
       "text/csv",
-      file,
+      fileName,
       performance.now(),
     );
     graph.getAnalyser().exportSpectrumToCSV(onSuccess, options);
@@ -1732,7 +1738,7 @@ function BlackboxLogViewer() {
     });
 
     $("#btn-spectrum-export").click(function (e) {
-      exportSpectrumToCsv("bf_spectrum");
+      exportSpectrumToCsv();
       e.preventDefault();
     });
 
@@ -1741,12 +1747,12 @@ function BlackboxLogViewer() {
       e.preventDefault();
       e.target.value = "";
     });
-    
+
     $("#btn-spectrum-clear").click(function (e) {
-      graph.getAnalyser().clearImportedSpectrums();
+      graph.getAnalyser().removeImportedSpectrums();
       e.preventDefault();
     });
-    
+
     $(".btn-gpx-export").click(function (e) {
       setGraphState(GRAPH_STATE_PAUSED);
       exportGpx();