/// <summary>
/// Resizes group of notes to the specified length treating all notes as single object.
/// </summary>
/// <param name="notes">Notes to resize.</param>
/// <param name="length">New length of the notes collection.</param>
/// <param name="distanceCalculationType">Type of distance calculations.</param>
/// <param name="tempoMap"></param>
/// <exception cref="ArgumentNullException"><paramref name="notes"/> is null. -or-
/// <paramref name="length"/> is null. -or- <paramref name="tempoMap"/> is null.</exception>
/// <exception cref="ArgumentException"><see cref="TimeSpanType.BarBeat"/> used for <paramref name="distanceCalculationType"/>
/// with relative resizing.</exception>
/// <exception cref="InvalidEnumArgumentException"><paramref name="distanceCalculationType"/> specified an
/// invalid value.</exception>
public static void ResizeNotes(this IEnumerable <Note> notes,
ITimeSpan length,
TimeSpanType distanceCalculationType,
TempoMap tempoMap)
{
ThrowIfArgument.IsNull(nameof(notes), notes);
ThrowIfArgument.IsNull(nameof(length), length);
ThrowIfArgument.IsInvalidEnumValue(nameof(distanceCalculationType), distanceCalculationType);
ThrowIfArgument.IsNull(nameof(tempoMap), tempoMap);
if (distanceCalculationType == TimeSpanType.BarBeat)
{
throw new ArgumentException("BarBeat length type is not supported for relative resizing.", nameof(distanceCalculationType));
}
if (!notes.Any())
{
return;
}
//
var minStartTime = long.MaxValue;
var maxEndTime = 0L;
foreach (var note in notes.Where(n => n != null))
{
var noteStartTime = note.Time;
var noteEndTime = noteStartTime + note.Length;
minStartTime = Math.Min(minStartTime, noteStartTime);
maxEndTime = Math.Max(maxEndTime, noteEndTime);
}
var totalLength = maxEndTime - minStartTime;
//
var oldLength = LengthConverter.ConvertTo(totalLength, distanceCalculationType, minStartTime, tempoMap);
var newLength = LengthConverter.ConvertTo(length, distanceCalculationType, minStartTime, tempoMap);
var ratio = TimeSpanUtilities.Divide(newLength, oldLength);
var startTime = TimeConverter.ConvertTo(minStartTime, distanceCalculationType, tempoMap);
foreach (var note in notes.Where(n => n != null))
{
var noteLength = note.LengthAs(distanceCalculationType, tempoMap);
var noteTime = note.TimeAs(distanceCalculationType, tempoMap);
var scaledShiftFromStart = noteTime.Subtract(startTime, TimeSpanMode.TimeTime).Multiply(ratio);
note.Time = TimeConverter.ConvertFrom(startTime.Add(scaledShiftFromStart, TimeSpanMode.TimeLength), tempoMap);
var scaledLength = noteLength.Multiply(ratio);
note.Length = LengthConverter.ConvertFrom(scaledLength, note.Time, tempoMap);
}
}
/// <summary>
/// Sets time and length of the specified chord.
/// </summary>
/// <param name="chord">Chord to set time and length to.</param>
/// <param name="time">Time to set to <paramref name="chord"/>.</param>
/// <param name="length">Length to set to <paramref name="chord"/>.</param>
/// <param name="tempoMap">Tempo map that will be used for time and length conversion.</param>
/// <returns>An input <paramref name="chord"/> with new time and length.</returns>
/// <exception cref="ArgumentNullException"><paramref name="chord"/> is null. -or-
/// <paramref name="time"/> is null. -or- <paramref name="length"/> is null. -or-
/// <paramref name="tempoMap"/> is null.</exception>
public static Chord SetTimeAndLength(this Chord chord, ITimeSpan time, ITimeSpan length, TempoMap tempoMap)
{
ThrowIfArgument.IsNull(nameof(chord), chord);
ThrowIfArgument.IsNull(nameof(time), time);
ThrowIfArgument.IsNull(nameof(length), length);
ThrowIfArgument.IsNull(nameof(tempoMap), tempoMap);
chord.Time = TimeConverter.ConvertFrom(time, tempoMap);
chord.Length = LengthConverter.ConvertFrom(length, chord.Time, tempoMap);
return(chord);
}
/// <summary>
/// Sets time and length of the specified note.
/// </summary>
/// <param name="note">Note to set time and length to.</param>
/// <param name="time">Time to set to <paramref name="note"/>.</param>
/// <param name="length">Length to set to <paramref name="note"/>.</param>
/// <param name="tempoMap">Tempo map that will be used for time and length conversion.</param>
/// <returns>An input <paramref name="note"/> with new time and length.</returns>
/// <exception cref="ArgumentNullException"><paramref name="note"/> is null. -or-
/// <paramref name="time"/> is null. -or- <paramref name="length"/> is null. -or-
/// <paramref name="tempoMap"/> is null.</exception>
public static Note SetTimeAndLength(this Note note, ITimeSpan time, ITimeSpan length, TempoMap tempoMap)
{
ThrowIfArgument.IsNull(nameof(note), note);
ThrowIfArgument.IsNull(nameof(time), time);
ThrowIfArgument.IsNull(nameof(length), length);
ThrowIfArgument.IsNull(nameof(tempoMap), tempoMap);
note.Time = TimeConverter.ConvertFrom(time, tempoMap);
note.Length = LengthConverter.ConvertFrom(length, note.Time, tempoMap);
return(note);
}
public PatternActionResult Invoke(long time, PatternContext context)
{
context.SaveTime(time);
var chordLength = LengthConverter.ConvertFrom(Length, time, context.TempoMap);
return(new PatternActionResult(time + chordLength,
NoteDefinitions.Select(d => new Note(d.NoteNumber, chordLength, time)
{
Channel = context.Channel,
Velocity = Velocity
})));
}
public PatternActionResult Invoke(long time, PatternContext context)
{
context.SaveTime(time);
var noteLength = LengthConverter.ConvertFrom(Length, time, context.TempoMap);
var note = new Note(Note.NoteNumber, noteLength, time)
{
Channel = context.Channel,
Velocity = Velocity
};
return(new PatternActionResult(time + noteLength, new[] { note }));
}
private static void ResizeNotesByRatio(IEnumerable <Note> notes,
double ratio,
TimeSpanType distanceCalculationType,
TempoMap tempoMap,
ITimeSpan startTime)
{
foreach (var note in notes)
{
var noteLength = note.LengthAs(distanceCalculationType, tempoMap);
var noteTime = note.TimeAs(distanceCalculationType, tempoMap);
var scaledShiftFromStart = noteTime.Subtract(startTime, TimeSpanMode.TimeTime).Multiply(ratio);
note.Time = TimeConverter.ConvertFrom(startTime.Add(scaledShiftFromStart, TimeSpanMode.TimeLength), tempoMap);
var scaledLength = noteLength.Multiply(ratio);
note.Length = LengthConverter.ConvertFrom(scaledLength, note.Time, tempoMap);
}
}
private static long ConvertFromTimeLength(MathTimeSpan mathTimeSpan, long time, TempoMap tempoMap)
{
var convertedTimeSpan1 = TimeConverter.ConvertFrom(mathTimeSpan.TimeSpan1, tempoMap);
switch (mathTimeSpan.Operation)
{
case MathOperation.Add:
return(convertedTimeSpan1 + LengthConverter.ConvertFrom(mathTimeSpan.TimeSpan2,
convertedTimeSpan1,
tempoMap));
case MathOperation.Subtract:
return(convertedTimeSpan1 - LengthConverter.ConvertFrom(mathTimeSpan.TimeSpan2,
convertedTimeSpan1,
tempoMap.Flip(convertedTimeSpan1)));
default:
throw new ArgumentException($"{mathTimeSpan.Operation} is not supported by the converter.", nameof(mathTimeSpan));
}
}
/// <summary>
/// Gets points in time of the current grid.
/// </summary>
/// <param name="tempoMap">Tempo map used to get grid's times.</param>
/// <returns>Collection of points in time of the current grid.</returns>
/// <exception cref="ArgumentNullException"><paramref name="tempoMap"/> is null.</exception>
public IEnumerable <long> GetTimes(TempoMap tempoMap)
{
ThrowIfArgument.IsNull(nameof(tempoMap), tempoMap);
if (!Steps.Any())
{
yield break;
}
var time = TimeConverter.ConvertFrom(Start, tempoMap);
yield return(time);
while (true)
{
foreach (var step in Steps)
{
time += LengthConverter.ConvertFrom(step, time, tempoMap);
yield return(time);
}
}
}
