public MidiSequenceReader(string fileName)
{
Sequence midiSequence = new Sequence();
midiSequence.Load(fileName);
int division = midiSequence.Division;
INote previousNote = null;
int previousNoteAbsoluteTicks = 0;
double percentageOfBarReached = 0;
bool startedNoteIsClosed = true;
TimeSignature previousTimeSignature = null;
Sequence.Symbols.Add(new Clef(ClefType.GClef));
foreach (Track track in midiSequence)
{
foreach (MidiEvent midiEvent in track.Iterator())
{
IMidiMessage midiMessage = midiEvent.MidiMessage;
switch (midiMessage.MessageType)
{
case MessageType.Meta:
MetaMessage metaMessage = midiMessage as MetaMessage;
switch (metaMessage.MetaType)
{
case MetaType.TimeSignature:
ITimeSignatureEvent timeSignatureEvent = new MidiTimeSignatureEvent(metaMessage);
Sequence.Symbols.Add(timeSignatureEvent.TimeSignature);
previousTimeSignature = timeSignatureEvent.TimeSignature;
break;
case MetaType.Tempo:
ITempoEvent tempoEvent = new MidiTempoEvent(metaMessage);
Sequence.BeatsPerMinute = tempoEvent.BeatsPerMinute;
break;
case MetaType.EndOfTrack:
break;
}
break;
case MessageType.Channel:
ChannelMessage channelMessage = midiEvent.MidiMessage as ChannelMessage;
if (channelMessage.Command == ChannelCommand.NoteOn)
{
INoteEvent noteEvent = new MidiNoteEvent(channelMessage);
INote note = noteEvent.Note;
if (note != null)
{
Sequence.Symbols.Add(note);
previousNote = note;
startedNoteIsClosed = false;
}
else
{
// Previous note must be closed
IBarLineEvent barLineEvent = new MidiBarLineEvent(
midiEvent, previousNote, ref startedNoteIsClosed,
ref previousNoteAbsoluteTicks, division, previousTimeSignature,
ref percentageOfBarReached);
if (barLineEvent.BarLine != null) // End of bar has been reached, start a new one
{
Sequence.Symbols.Add(barLineEvent.BarLine);
}
}
}
break;
}
}
}
}