static void Main(string[] args)
{
// override default local culture settings
var englishCulture = CultureInfo.CreateSpecificCulture("en-US");
CultureInfo.CurrentCulture = englishCulture;
CultureInfo.CurrentUICulture = englishCulture;
Console.WriteLine("Testing Composition Services...");
// midi (playback) file path
string filePath = ConfigurationManager.AppSettings["midiFile"];
// chords file path
string chordsFilePath = ConfigurationManager.AppSettings["chordsFile"];
// source files for testing
string filePathTest = ConfigurationManager.AppSettings["midiFileTest"];
string chordsPathTest = ConfigurationManager.AppSettings["chordsFileTest"];
// set the strategy compositor
CompositionStrategy compositionStrategy = CompositionStrategy.GeneticAlgorithmStrategy;
MelodyEvaluatorsWeights evaluatorsWeights = new MelodyEvaluatorsWeights
{
AccentedBeats = 30,
ContourDirection = 10,
ContourStability = 15,
DensityBalance = 15,
ExtremeIntervals = 25,
PitchRange = 15,
PitchVariety = 15,
SmoothMovement = 20,
Syncopation = 20
};
// create a new composition with injected strategy
CompositionContext compositionContext = new CompositionContext(chordsFilePath, filePath, melodyTrackIndex: MelodyTrackIndex.TrackNumber1);
IMidiFile[] newMidiFiles = compositionContext.Compose(
compositionStrategy,
musicalInstrument: MusicalInstrument.ElectricGrandPiano,
overallNoteDurationFeel: OverallNoteDurationFeel.Intense,
pitchRangeSource: PitchRangeSource.Custom,
minPitch: NotePitch.C3,
maxPitch: NotePitch.G6,
useExistingMelodyAsSeed: false,
customParams: evaluatorsWeights);
IMidiFile[] bestCompositions = newMidiFiles.Take(10).ToArray();
for (int i = 0; i < bestCompositions.Count(); i++)
{
bestCompositions[i].SaveFile(fileNamePrefix: $"consoleTest_{i+1}_");
}
bestCompositions.FirstOrDefault()?.FadeOut();
bestCompositions.FirstOrDefault()?.Play();
}
public async Task <ActionResult> Compose(CompositionViewModel model)
{
// validate that sum of weights is equal to 100
double weightSum = model.WeightSum;
if (weightSum != 100)
{
string errorMessage =
$"The total weights of all fitness function " +
$"evaluators must sum up to 100.\n" +
$"The current sum is {weightSum}";
this.ModelState.AddModelError(nameof(model.AccentedBeats), errorMessage);
}
// assure all other validations passed okay
if (!ModelState.IsValid)
{
CompositionViewModel viewModel = new CompositionViewModel
{
SongSelectList = new SelectList(_databaseGateway.Songs.GetAll().OrderBy(s => s.Title), nameof(Song.Id), nameof(Song.Title)),
PitchSelectList = new SelectList(_pitchSelectList, nameof(PitchRecord.Pitch), nameof(PitchRecord.Description)),
};
return(View(viewModel));
}
// fetch song from datasource
Song song = _databaseGateway.Songs.Get(model.SongId);
// get the chord and file paths on the file server
string chordFilePath = await SongsController.GetSongPath(song.Id, _databaseGateway, User, SongFileType.ChordProgressionFile);
string midiFilePath = await SongsController.GetSongPath(song.Id, _databaseGateway, User, SongFileType.MidiOriginalFile);
// create a compositon instance
CompositionContext composition = new CompositionContext(
chordProgressionFilePath: chordFilePath,
midiFilePath: midiFilePath,
melodyTrackIndex: song.MelodyTrackIndex);
// build evaluators weights
MelodyEvaluatorsWeights weights = new MelodyEvaluatorsWeights
{
AccentedBeats = model.AccentedBeats,
ContourDirection = model.ContourDirection,
ContourStability = model.ContourStability,
DensityBalance = model.DensityBalance,
ExtremeIntervals = model.ExtremeIntervals,
PitchRange = model.PitchRange,
PitchVariety = model.PitchVariety,
SmoothMovement = model.SmoothMovement,
Syncopation = model.Syncopation
};
// Compose some melodies and fetch the best one
IMidiFile midiFile = composition.Compose(
strategy: CompositionStrategy.GeneticAlgorithmStrategy,
overallNoteDurationFeel: model.OverallNoteDurationFeel,
musicalInstrument: model.MusicalInstrument,
minPitch: model.MinPitch,
maxPitch: model.MaxPitch,
useExistingMelodyAsSeed: model.useExistingMelodyAsSeed,
customParams: weights)
.FirstOrDefault();
// save the midifile output internally
_midiFile = midiFile;
ViewBag.MidiFile = midiFile;
// save file on the file server
string directoryPath = HomeController.GetFileServerPath() + "Outputs" +
Path.DirectorySeparatorChar + song.Id + Path.DirectorySeparatorChar;
Directory.CreateDirectory(directoryPath);
string filePath = _midiFile.SaveFile(outputPath: directoryPath);
// return the file to the client client for downloading
string fileName = Path.GetFileName(filePath);
byte[] fileBytes = System.IO.File.ReadAllBytes(filePath);
return(File(fileBytes, System.Net.Mime.MediaTypeNames.Application.Octet, fileName));
}
