public static IList <MidiEvent> GetTrackByName(this MidiEventCollection midiEventCollection, string name)
{
var track = midiEventCollection.FindTrackByName(name);
if (track == null)
{
throw new TrackNotFoundException(name);
}
return(track);
}
public void ConvertLastBeatToEnd(MidiEventCollection midi)
{
var beatTrack = midi.GetTrackByName(TrackName.Beat.ToString());
var lastBeatOn = beatTrack.OfType <NoteOnEvent>().OrderBy(e => e.AbsoluteTime).LastOrDefault(MidiEvent.IsNoteOn);
if (lastBeatOn == null)
{
throw new InvalidBeatTrackException($"No notes were found on the {TrackName.Beat} track");
}
var eventsTrack = midi.FindTrackByName(TrackName.Events.ToString());
if (eventsTrack != null)
{
var existingEvent = eventsTrack.FindFirstTextEvent(EventName.End.ToString());
if (existingEvent != null)
{
AddInfo($"{EventName.End} event already exists at {GetBarInfo(midi, existingEvent)}, left last beat in place.");
return;
}
}
else
{
eventsTrack = midi.AddNamedTrack(TrackName.Events.ToString());
}
beatTrack.Remove(lastBeatOn);
beatTrack.Remove(lastBeatOn.OffEvent);
// Fix beat track end
var newLastEvent = beatTrack.OfType <NoteEvent>().OrderBy(e => e.AbsoluteTime).Last();
UpdateTrackEnd(beatTrack, newLastEvent.AbsoluteTime);
eventsTrack.Add(new TextEvent(EventName.End.ToString(), MetaEventType.TextEvent, lastBeatOn.AbsoluteTime));
UpdateTrackEnd(eventsTrack, lastBeatOn.AbsoluteTime);
}
