public void ConstrainNotesToMeasureBoundaries()
{
foreach (var note in this.Notes)
{
//get start and end boundary points for this note
MidiTime startOfBar = new MidiTime(this.File, note.AveragePosition.Measures, 1, 0, this.TimeSignature);
MidiTime endOfBar = new MidiTime(this.File, note.AveragePosition.Measures + 1, 1, 0, this.TimeSignature);
if (note.StartPosition.GetAsTotalTicks() < startOfBar.GetAsTotalTicks())
{
//note is mostly in current bar but the note starts just before the bar start.
//Move the note start to the to start of the measure
note.StartPosition = new MidiTime(startOfBar);
note.CalculateEndPosition();
}
else if (note.EndPosition.GetAsTotalTicks() > endOfBar.GetAsTotalTicks())
{
///note is mostly in current bar but the note ends just after the bar end.
///Shorten the length of the note.
///This will only rarely happen because at this point the note lengths are 1 and so arent long enough to span two measures
note.Length = endOfBar.GetAsTotalTicks() - note.StartPosition.GetAsTotalTicks();
note.CalculateEndPosition();
}
}
}
/// <summary>
/// the position of the region boundaries are calculated on the fly by using the current time
/// signature and pulses per QN
/// </summary>
/// <param name="position"></param>
/// <param name="pulsesPerQuarterNote"></param>
/// <param name="timeSig"></param>
/// <returns></returns>
public Region GetRegion(MidiTime position, uint pulsesPerQuarterNote, TimeSignatureEvent timeSig)
{
uint posTicks = position.GetAsTotalTicks(pulsesPerQuarterNote, timeSig);
foreach (Region r in this.Regions)
{
if (posTicks >= r.Start.GetAsTotalTicks(pulsesPerQuarterNote, timeSig) &&
posTicks < r.End.GetAsTotalTicks(pulsesPerQuarterNote, timeSig))
{
return(r);
}
}
return(null);
}
