/// <summary>
/// Classify the given songs and output a JSON string with the results.
/// </summary>
/// <remarks>
/// Results will be in the following format:
///
/// { "ClassifierResults":
/// [ { "song":
/// {
/// "title": "path\to\file\1.mp3",
/// "energy": 0.40120655758066681,
/// "positivity": 0.47041366490774172
/// }
/// },
/// { "song":
/// {
/// "title": "path\to\file\2.mp3",
/// "energy": 0.34171391252526506,
/// "positivity": 0.28074189017885803
/// }
/// },
/// ...
/// ]
/// }
/// </remarks>
///
///
/// <param name="songPaths">Paths to the songs to classify.</param>
public string Classify(string[] songPaths)
{
if (posSvm == null || energySvm == null)
{
throw new Exception("SVMs have not yet been trained!");
}
//Get features for all the songs
List <SongDataDTO> songsWithFeatures = getFeatures(songPaths);
//Classify each song
List <ClassifierResult> classifierResults = new List <ClassifierResult>();
ConsoleManager.Show();
for (int i = 0; i < songsWithFeatures.Count; i++)
{
SongDataDTO songData = songsWithFeatures[i];
ClassifierResult result = new ClassifierResult();
Song song = new Song();
//song.title = songData.getFilename(); Turns the database into .wavs
song.title = songPaths[i];
//Convert dto to double arrays (so svm can use them)
double[] posFeatures = new double[bextractPosCols.Count()];
double[] energyFeatures = new double[bextractEnergyCols.Count()];
ConvertSongDataDtoToDoubleArrays(songData, ref posFeatures, ref energyFeatures);
//Run classification
song.positivity = posSvm.Score(posFeatures);
song.energy = energySvm.Score(energyFeatures);
result.song = song;
//Fun Debugging info
Console.WriteLine("Song: {0}\n Positivity: {1}\n Energy: {2} \n\n", song.title, song.positivity, song.energy);
classifierResults.Add(result);
}
Console.WriteLine("Press Enter to continue");
Console.ReadLine();
ConsoleManager.Hide();
EmotionSpaceDTOList emotionSpaceDtoList = new EmotionSpaceDTOList();
emotionSpaceDtoList.ClassifierResults = classifierResults;
return(JsonSerializer.serializeToJson(emotionSpaceDtoList));
}
public static string serializeToJson(EmotionSpaceDTOList dto)
{
return(new JavaScriptSerializer().Serialize(dto));
}