/// <summary>
/// This method calls IndexCalculateSixOnly.Analysis() to calculate six spectral indices
/// and then calls ContentSignatures.AnalyzeOneMinute() to obtain a content description derived from those indices and an array of functional templates.
/// </summary>
public override AnalysisResult2 Analyze <T>(AnalysisSettings analysisSettings, SegmentSettings <T> segmentSettings)
{
// set the start time for the current recording segment. Default is zero.
var elapsedTimeAtStartOfRecording = segmentSettings.SegmentStartOffset;
var startMinuteId = (int)Math.Round(elapsedTimeAtStartOfRecording.TotalMinutes);
var audioFile = segmentSettings.SegmentAudioFile;
var recording = new AudioRecording(audioFile.FullName);
// Calculate six spectral indices.
var segmentResults = IndexCalculateSixOnly.Analysis(
recording,
segmentSettings.SegmentStartOffset,
segmentSettings.Segment.SourceMetadata.SampleRate);
// DO THE CONTENT DESCRIPTION FOR ONE MINUTE HERE
// First get acoustic indices for one minute, convert to Dictionary and normalize the values.
var indicesDictionary = segmentResults.AsArray().ToTwoDimensionalArray(SpectralIndexValuesForContentDescription.CachedSelectors);
//var indicesDictionary = IndexCalculateSixOnly.ConvertIndicesToDictionary(segmentResults);
foreach (string key in ContentSignatures.IndexNames)
{
var indexBounds = ContentSignatures.IndexValueBounds[key];
var indexArray = indicesDictionary[key];
var normalisedVector = DataTools.NormaliseInZeroOne(indexArray, indexBounds[0], indexBounds[1]);
indicesDictionary[key] = normalisedVector;
}
// scan templates over one minute of indices to get content description
var descriptionResultForOneMinute = ContentSignatures.AnalyzeOneMinute(
this.functionalTemplates,
this.templatesAsDictionary,
indicesDictionary.ToDictionary(kvp => kvp.Key, kvp => kvp.Value.GetRow(0)), // this line converts dictionary of one-row matrices to dictionary of arrays.
startMinuteId);
// set up the analysis results to return
var analysisResults = new AnalysisResult2(analysisSettings, segmentSettings, recording.Duration)
{
AnalysisIdentifier = this.Identifier,
SpectralIndices = new SpectralIndexBase[]
{
// Transfer the spectral index results to AnalysisResults
// TODO: consider not returning this value if it is not needed in summarize
segmentResults,
},
MiscellaneousResults =
{
{ nameof(DescriptionResult), descriptionResultForOneMinute },
},
};
analysisResults.SpectralIndices[0].ResultStartSeconds = segmentSettings.SegmentStartOffset.TotalSeconds;
//spectralIndexBase.ResultStartSeconds >= result.SegmentStartOffset.TotalSeconds,
return(analysisResults);
}
public static void TestTemplates(FileInfo listOfIndexFiles, FileInfo templatesFile, FileInfo imageOfLdfcSpectrogram)
{
var contentDictionary = ContentSignatures.ContentDescriptionOfMultipleRecordingFiles(listOfIndexFiles, templatesFile);
// Write the results to a csv file
var outputDirectory = templatesFile.DirectoryName;
var filePath = Path.Combine(outputDirectory ?? throw new InvalidOperationException("Output directory does not exist."), "AcousticSignatures.csv");
FileTools.WriteDictionaryAsCsvFile(contentDictionary, filePath);
// get content description plots and use to examine score distributions.
var contentPlots = ContentSignatures.GetPlots(contentDictionary);
var images = GraphsAndCharts.DrawPlotDistributions(contentPlots);
var plotsImage = ImageTools.CombineImagesVertically(images);
var path1 = Path.Combine(outputDirectory, "ScoreDistributions.png");
plotsImage.Save(path1);
// Attach plots to LDFC spectrogram and write to file
var imageList = new List <Image <Rgb24> >();
if (imageOfLdfcSpectrogram != null)
{
var ldfcSpectrogram = Image.Load <Rgb24>(imageOfLdfcSpectrogram.FullName);
imageList.Add(ldfcSpectrogram);
}
if (contentPlots != null)
{
int plotHeight = 30;
foreach (var plot in contentPlots)
{
var imageOfPlot = plot.DrawAnnotatedPlot(plotHeight);
imageList.Add(imageOfPlot);
}
}
if (imageList.Count != 0)
{
var opImage = ImageTools.CombineImagesVertically(imageList);
var path2 = Path.Combine(outputDirectory, templatesFile.BaseName() + ".TestOfTemplates.png");
opImage.Save(path2);
}
//Console.WriteLine("# Finished test of content description templates");
}
