private static TempoMap GenerateComplexTempoMap()
{
// 4/4 5/8 5/16 5/8
// |----+----+----+----|----+----+----+----|--+--+--+--+--|-+-+-+-+-|-+-+-+-+-|-+-+-+-+-|--+--+--+--+--|
// 0 1 2 3 4 5 6 7
var steps = new[]
{
Tuple.Create(2 * MusicalTimeSpan.Whole, new TimeSignature(5, 8)),
Tuple.Create(5 * MusicalTimeSpan.Eighth, new TimeSignature(5, 16)),
Tuple.Create(15 * MusicalTimeSpan.Sixteenth, new TimeSignature(5, 8)),
};
using (var tempoMapManager = new TempoMapManager(new TicksPerQuarterNoteTimeDivision(TicksPerQuarterNote)))
{
var time = new MusicalTimeSpan();
foreach (var step in steps)
{
time += step.Item1;
tempoMapManager.SetTimeSignature(time, step.Item2);
}
tempoMapManager.SetTempo(new MetricTimeSpan(0, 0, 10), Tempo.FromMillisecondsPerQuarterNote(300));
tempoMapManager.SetTempo(new MetricTimeSpan(0, 1, 30), Tempo.FromMillisecondsPerQuarterNote(600));
tempoMapManager.SetTempo(new MetricTimeSpan(0, 1, 31), Tempo.FromMillisecondsPerQuarterNote(640));
return(tempoMapManager.TempoMap);
}
}
private long GetTempo(MidiFile midiFile)
{
TempoMap tempoMap = midiFile.GetTempoMap();
long ticks = 123;
BarBeatTimeSpan barBeatTimeSpan = TimeConverter.ConvertTo <BarBeatTimeSpan>(ticks, tempoMap);
MusicalTimeSpan musicalTimeSpan = TimeConverter.ConvertTo <MusicalTimeSpan>(ticks, tempoMap);
return(barBeatTimeSpan.Bars);
}
private static void Quantize(MidiFile midiFile, MusicalTimeSpan step)
{
var tempoMap = midiFile.GetTempoMap();
var stepTicks = LengthConverter.ConvertFrom(step, 0, tempoMap);
midiFile.ProcessNotes(n =>
{
var time = n.Time;
n.Time = (long)Math.Round(time / (double)stepTicks) * stepTicks;
});
}
/// <summary>
/// Calculates durations that are the result of adding and/or subtracting
/// length of existing durations.
/// </summary>
/// <param name="operation"> The requested arithmetic operaton (add, subtract). </param>
/// <param name="duration1"> The first duration operand. </param>
/// <param name="duration2"> The second duration operand. </param>
/// <returns> The result duration of the operation (sum or difference). </returns>
internal static IDuration DurationArithmetic(ArithmeticOperation operation, IDuration duration1, IDuration duration2)
{
MusicalTimeSpan timeSpan1 = new MusicalTimeSpan(duration1.Numerator, duration1.Denominator, true);
MusicalTimeSpan timeSpan2 = new MusicalTimeSpan(duration2.Numerator, duration2.Denominator, true);
MusicalTimeSpan newTimeSpan = null;
switch (operation)
{
case ArithmeticOperation.Add:
newTimeSpan = timeSpan1.Add(timeSpan2, TimeSpanMode.LengthLength) as MusicalTimeSpan;
break;
case ArithmeticOperation.Subtract:
newTimeSpan = timeSpan1.Subtract(timeSpan2, TimeSpanMode.LengthLength) as MusicalTimeSpan;
break;
default:
throw new NotSupportedException($"{nameof(operation)} is currently unsupported");
}
return(MusicTheoryFactory.CreateDuration((byte)newTimeSpan?.Numerator, (byte)newTimeSpan?.Denominator));
}
private static MidiTimeSpan GetDefaultMidiTimeSpan(MusicalTimeSpan timeSpan)
{
return(new MidiTimeSpan(4 * TimeSpanTestUtilities.TicksPerQuarterNote * timeSpan.Numerator / timeSpan.Denominator));
}
private static void CheckTimeSpan(MusicalTimeSpan timeSpan, long numerator, long denominator)
{
Assert.AreEqual(numerator, timeSpan.Numerator, "Numerator is invalid.");
Assert.AreEqual(denominator, timeSpan.Denominator, "Denominator is invalid.");
}
private static void CheckChangeDenominator(MusicalTimeSpan timeSpan, long denominator, long numerator)
{
CheckTimeSpan(timeSpan.ChangeDenominator(denominator), numerator, denominator);
}
