public static void DiscretizeBends(Model midi)
{
var bendedNotes = midi.EventsOfType <NoteOn>(n => n.Bends != null && n.Bends.Count > 0).ToArray();
// divide note into not-bended ones
foreach (var note in bendedNotes)
{
var tmpNote = note;
var pitch = note.NoteNumber;
var end = note.End;
var bends = note.Bends.OrderBy(b => b.AbsoluteRealTime).ToArray();
note.Bends = new List <PitchBend>();
foreach (var bend in bends)
{
tmpNote.End = bend.AbsoluteRealTime;
tmpNote.RealTimeLength = tmpNote.End - tmpNote.AbsoluteRealTime;
var bendedPitch = (byte)(pitch + bend.RealPitchChange + 0.5);
if (bendedPitch != tmpNote.NoteNumber)
{
tmpNote = new NoteOn
{
AbsoluteRealTime = bend.AbsoluteRealTime,
AbsoluteTime = bend.AbsoluteTime,
ChannelNumber = note.ChannelNumber,
Instrument = note.Instrument,
NoteNumber = bendedPitch,
Volume = note.Volume,
RealVolume = note.RealVolume,
Bends = new List <PitchBend>()
};
midi.Tracks[0].Channels[tmpNote.ChannelNumber].Events.Add(tmpNote);
}
}
tmpNote.End = end;
tmpNote.RealTimeLength = tmpNote.End - tmpNote.AbsoluteRealTime;
}
// delete all pitch bends
var channels = midi.Tracks.SelectMany(t => t.Channels);
foreach (var channel in channels)
{
channel.Events.RemoveAll(e => e is PitchBend);
}
}
double ControllerValueDuringNote(IEnumerable <Controller>[] changes, NoteOn note, double defaultValue = 96)
{
var during = changes[note.ChannelNumber]
.Where(ch => ch.AbsoluteRealTime < note.AbsoluteRealTime + note.RealTimeLength)
.Where(ch => ch.AbsoluteRealTime >= note.AbsoluteRealTime);
if (during.Any())
{
return(during.Average(d => d.ControllerValue));
}
var before = changes[note.ChannelNumber].Where(ch => ch.AbsoluteRealTime <= note.AbsoluteRealTime);
if (before.Any())
{
// select max according to AbsoluteRealTIme
return(before.Aggregate((prev, act) => prev.AbsoluteRealTime < act.AbsoluteRealTime ? act : prev).ControllerValue);
}
return(defaultValue);
}
