public void ClassifySongsTogether()
{
string positivitySvmPath = System.IO.Path.Combine(Classifier.ExecutableInformation.getModelsDir(), positiveClassificationMethod);
string energySvmPath = System.IO.Path.Combine(Classifier.ExecutableInformation.getModelsDir(), energyClassificationMethod);
Classifier.SupportVectorMachine svm = new Classifier.SupportVectorMachine(positivitySvmPath, energySvmPath);
List <string> unclassifiedSongs = new List <string>();
foreach (string song in songs)
{
if (!ServerDatabase.Instance.DoesSongExist(song))
{
unclassifiedSongs.Add(song);
}
}
//Don't try to reclassify the same song. Waste of time.
string output = svm.Classify(unclassifiedSongs);
foreach (ClassifierResult result in JsonDTOMapper.getJsonDTO(output).ClassifierResults)
{
Song classifiedSong = result.song;
EmotionSpaceDTO point = new EmotionSpaceDTO(classifiedSong.energy, classifiedSong.positivity);
ServerDatabase.Instance.addSongToDatabase(classifiedSong.title, point);
}
}
public List <string> getSongs(int numberOfSongs, EmotionSpaceDTO emotionSpaceDTO)
{
Dictionary <string, EmotionSpaceDTO> songs = new Dictionary <string, EmotionSpaceDTO>();
Action <SQLiteDataReader> addSongsToDict = (rdr) =>
{
while (rdr.Read())
{
EmotionSpaceDTO point = new EmotionSpaceDTO();
point.Energy = rdr.GetDouble(1);
point.Positivity = rdr.GetDouble(2);
songs[rdr.GetString(0)] = point;
}
};
getAllSongs(addSongsToDict);
if (songs.Count < numberOfSongs)
{
numberOfSongs = songs.Count;
}
List <SongDistance> closeSongs = new List <SongDistance>(numberOfSongs);
double farPoint = double.MinValue;
foreach (KeyValuePair <string, EmotionSpaceDTO> kvp in songs)
{
SongDistance val = new SongDistance();
val.distance = getDistance(emotionSpaceDTO, kvp.Value);
val.song = kvp.Key;
if (closeSongs.Count < numberOfSongs)
{
closeSongs.Add(val);
if (farPoint < val.distance)
{
farPoint = val.distance;
}
}
else
{
if (val.distance < farPoint)
{
closeSongs.Add(val);
closeSongs.Sort(compareDistance);
closeSongs.RemoveAt(closeSongs.Count - 1);
}
}
}
List <string> ret = new List <string>();
foreach (SongDistance finalVal in closeSongs)
{
ret.Add(finalVal.song);
}
return(ret);
}
public void Classify()
{
Classifier clas = new Classifier();
foreach (string song in songs)
{
if (!ServerDatabase.Instance.DoesSongExist(song))
{
//Don't try to reclassify the same song. Waste of time.
string output = clas.classify(song);
Song classifiedSong = JsonDTOMapper.getJsonDTO(output).ClassifierResults[0].song;
EmotionSpaceDTO point = new EmotionSpaceDTO(classifiedSong.energy, classifiedSong.positivity);
ServerDatabase.Instance.addSongToDatabase(song, point);
}
}
}
/// <summary>
/// Adds a song to the database
/// </summary>
/// <param name="songpath">The location of the song</param>
/// <param name="emotionSpaceDTO">The coordinates in the emotionspace</param>
public void addSongToDatabase(string songpath, EmotionSpaceDTO emotionSpaceDTO)
{
try
{
using (SQLiteConnection connection = Connect())
{
using (SQLiteTransaction tranaction = connection.BeginTransaction())
{
using (SQLiteCommand command = connection.CreateCommand())
{
command.Transaction = tranaction;
command.CommandText = string.Format("INSERT INTO SONGS (Path, Energy, Postitvity) VALUES (\"{0}\",{1},{2})", songpath, emotionSpaceDTO.Energy, emotionSpaceDTO.Positivity);
command.ExecuteNonQuery();
}
tranaction.Commit();
}
}
}
catch
{
//This is likely trying to add a song twice. Just silently fail
}
}
private double getDistance(EmotionSpaceDTO pointA, EmotionSpaceDTO pointB)
{
return(Math.Sqrt(Math.Pow(pointA.Energy - pointB.Energy, 2) + Math.Pow(pointA.Positivity - pointB.Positivity, 2)));
}
