public override Model.Score Parse(string source)
{
var score = Score.CreateOneStaffScore(Clef.Treble, MajorScale.C);
var splitted = source.Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
foreach (var element in splitted)
{
if (element.Contains("_"))
{
var pitchAndDuration = element.Split(new[] { '_' }, StringSplitOptions.RemoveEmptyEntries);
var midiPitch = int.Parse(pitchAndDuration[1]);
var denominator = int.Parse(pitchAndDuration[0].Replace(".", ""));
var numberOfNotes = pitchAndDuration[0].ToCharArray().Where(c => c == '.').Count();
var denominatorAsPowerOfTwo = UsefulMath.Log2(denominator);
var note = Note.FromMidiPitch(midiPitch, new RhythmicDuration(denominatorAsPowerOfTwo, numberOfNotes));
score.FirstStaff.Elements.Add(note);
}
else if (element == "|")
{
score.FirstStaff.Elements.Add(new Barline());
}
else
{
var denominator = int.Parse(element.Replace(".", ""));
var numberOfNotes = element.ToCharArray().Where(c => c == '.').Count();
var denominatorAsPowerOfTwo = UsefulMath.Log2(denominator);
var rest = new Rest(new RhythmicDuration(denominatorAsPowerOfTwo, numberOfNotes));
score.FirstStaff.Elements.Add(rest);
}
}
return(score);
}
public static IEnumerable <Note> AddUniformRhythm(this IEnumerable <Pitch> pitches, int duration)
{
var durationAsPowerOfTwo = UsefulMath.Log2(duration);
return(AddUniformRhythm(pitches, new RhythmicDuration(durationAsPowerOfTwo)));
}
/// <summary>
/// Performs rebeaming with simple rules
/// </summary>
/// <param name="notes">Notes to rebeam</param>
/// <param name="hookDirectionAlgorithm">Algorithm for determining hook direction in beams</param>
/// <returns>Rebeamed notes</returns>
public IEnumerable <NoteOrRest> Rebeam(IEnumerable <NoteOrRest> notes, HookDirectionAlgorithm hookDirectionAlgorithm = HookDirectionAlgorithm.ProductionCandidate)
{
Note previousNote = null;
Note currentNote = null;
Note nextNote = null;
var noteArray = notes.ToArray();
for (int i = 0; i < noteArray.Length; i++)
{
previousNote = i == 0 ? null : noteArray[i - 1] as Note;
currentNote = noteArray[i] as Note;
nextNote = i == noteArray.Length - 1 ? null : noteArray[i + 1] as Note;
currentNote.BeamList.Clear();
var numberOfBeams = currentNote.BaseDuration > RhythmicDuration.Eighth ? 0 : UsefulMath.Log2((int)currentNote.BaseDuration.Denominator) - 2;
var numberOfBeamsOnPreviousNote = previousNote == null || previousNote.BaseDuration > RhythmicDuration.Eighth ?
0 : UsefulMath.Log2((int)previousNote.BaseDuration.Denominator) - 2;
var numberOfBeamsOnNextNote = nextNote == null || nextNote.BaseDuration > RhythmicDuration.Eighth ?
0 : UsefulMath.Log2((int)nextNote.BaseDuration.Denominator) - 2;
for (var b = 0; b < numberOfBeams; b++)
{
if (previousNote == null)
{
if (nextNote != null && numberOfBeamsOnNextNote < b + 1)
{
currentNote.BeamList.Add(DetermineHookDirection(notes.ToList(), currentNote, hookDirectionAlgorithm));
}
else
{
currentNote.BeamList.Add(NoteBeamType.Start);
}
}
else if (nextNote == null)
{
if (previousNote != null && numberOfBeamsOnPreviousNote < b + 1)
{
currentNote.BeamList.Add(DetermineHookDirection(notes.ToList(), currentNote, hookDirectionAlgorithm));
}
else
{
currentNote.BeamList.Add(NoteBeamType.End);
}
}
else
{
if (numberOfBeamsOnPreviousNote >= b + 1 && numberOfBeamsOnNextNote >= b + 1)
{
currentNote.BeamList.Add(NoteBeamType.Continue);
}
else if (numberOfBeamsOnPreviousNote < b + 1 && numberOfBeamsOnNextNote < b + 1)
{
currentNote.BeamList.Add(DetermineHookDirection(notes.ToList(), currentNote, hookDirectionAlgorithm));
}
else if (numberOfBeamsOnPreviousNote < b + 1)
{
currentNote.BeamList.Add(NoteBeamType.Start);
}
else if (numberOfBeamsOnNextNote < b + 1)
{
currentNote.BeamList.Add(NoteBeamType.End);
}
}
}
}
return(notes);
}
