/** A NoteOff event occured. Find the MidiNote of the corresponding
* NoteOn event, and update the duration of the MidiNote.
*/
public void NoteOff(int channel, int notenumber, int endtime)
{
for (int i = notes.Count - 1; i >= 0; i--)
{
MidiNote note = notes[i];
if (note.Channel == channel && note.Number == notenumber &&
note.Duration == 0)
{
note.NoteOff(endtime);
return;
}
}
}
/** Create a MidiTrack based on the Midi events. Extract the NoteOn/NoteOff
* events to gather the list of MidiNotes.
*/
public MidiTrack(List <MidiEvent> events, int tracknum)
{
this.tracknum = tracknum;
notes = new List <MidiNote>(events.Count);
instrument = 0;
foreach (MidiEvent mevent in events)
{
if (mevent.EventFlag == MidiFile.EventNoteOn && mevent.Velocity > 0)
{
MidiNote note = new MidiNote(mevent.StartTime, mevent.Channel, mevent.Notenumber, 0);
AddNote(note);
}
else if (mevent.EventFlag == MidiFile.EventNoteOn && mevent.Velocity == 0)
{
NoteOff(mevent.Channel, mevent.Notenumber, mevent.StartTime);
}
else if (mevent.EventFlag == MidiFile.EventNoteOff)
{
NoteOff(mevent.Channel, mevent.Notenumber, mevent.StartTime);
}
else if (mevent.EventFlag == MidiFile.EventProgramChange)
{
instrument = mevent.Instrument;
}
else if (mevent.Metaevent == MidiFile.MetaEventLyric)
{
if (lyrics == null)
{
lyrics = new List <MidiEvent>();
}
lyrics.Add(mevent);
}
}
if (notes.Count > 0 && notes[0].Channel == 9)
{
instrument = 128; /* Percussion */
}
int lyriccount = 0;
if (lyrics != null)
{
lyriccount = lyrics.Count;
}
}
CreateNoteData(List <MidiNote> midinotes, KeySignature key,
TimeSignature time)
{
int len = midinotes.Count;
NoteData[] notedata = new NoteData[len];
for (int i = 0; i < len; i++)
{
MidiNote midi = midinotes[i];
notedata[i] = new NoteData();
notedata[i].number = midi.Number;
notedata[i].leftside = true;
notedata[i].whitenote = key.GetWhiteNote(midi.Number);
notedata[i].duration = time.GetNoteDuration(midi.EndTime - midi.StartTime);
notedata[i].accid = key.GetAccidental(midi.Number, midi.StartTime / time.Measure);
if (i > 0 && (notedata[i].whitenote.Dist(notedata[i - 1].whitenote) == 1))
{
/* This note (notedata[i]) overlaps with the previous note.
* Change the side of this note.
*/
if (notedata[i - 1].leftside)
{
notedata[i].leftside = false;
}
else
{
notedata[i].leftside = true;
}
}
else
{
notedata[i].leftside = true;
}
}
return(notedata);
}
/** Add a MidiNote to this track. This is called for each NoteOn event */
public void AddNote(MidiNote m)
{
notes.Add(m);
}
