public static void Test()
{
var midiFile = new MidiFile();
TempoMap tempoMap = midiFile.GetTempoMap();
var trackChunk = new TrackChunk();
using (var notesManager = trackChunk.ManageNotes())
{
NotesCollection notes = notesManager.Notes;
var g = Enum.GetValues(typeof(NoteName));
NoteName n = (NoteName)g.GetValue(MainWindow._rnd.Next(g.Length));
notes.Add(new InterNote(n, 4, LC.ConvertFrom(
new MetricTimeSpan(hours: 0, minutes: 0, seconds: 2), 0, tempoMap)));
n = (NoteName)g.GetValue(MainWindow._rnd.Next(g.Length));
notes.Add(new InterNote(n, 3, LC.ConvertFrom(
new MetricTimeSpan(hours: 0, minutes: 0, seconds: 1, milliseconds: 500), 0, tempoMap)));
n = (NoteName)g.GetValue(MainWindow._rnd.Next(g.Length));
notes.Add(new InterNote(n, 5, LC.ConvertFrom(
new MetricTimeSpan(hours: 0, minutes: 0, seconds: 3), 0, tempoMap)));
}
midiFile.Chunks.Add(trackChunk);
using (var outputDevice = OutputDevice.GetByName("Microsoft GS Wavetable Synth"))
using (var playback = midiFile.GetPlayback(outputDevice))
{
// playback.Speed = 2.0;
playback.Play();
}
}
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);
}
}
public void InitPlay()
{
_midiFile = new MidiFile();
TempoMap tempoMap = _midiFile.GetTempoMap();
var trackChunk = new TrackChunk();
using (var notesManager = trackChunk.ManageNotes())
{
NotesCollection notes = notesManager.Notes;
var len = LC.ConvertFrom(new MetricTimeSpan(hours: 0, minutes: 0, seconds: 1), 0, tempoMap);
notes.Add(new InterNote(Note, Octave, len));
}
_midiFile.Chunks.Add(trackChunk);
}
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 <c>null</c>.</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);
}
}
}
