Method processOutEvent

src/tracks/InstrumentTrack.cpp:384–433

void InstrumentTrack::processOutEvent( const MidiEvent& event, const MidiTime& time, f_cnt_t offset )
{
	// do nothing if we do not have an instrument instance (e.g. when loading settings)
	if( m_instrument == NULL )
	{
		return;
	}

	const MidiEvent transposedEvent = applyMasterKey( event );
	const int key = transposedEvent.key();

	switch( event.type() )
	{
		case MidiNoteOn:
			m_midiNotesMutex.lock();
			m_piano.setKeyState( event.key(), true );	// event.key() = original key

			if( key >= 0 && key < NumKeys )
			{
				if( m_runningMidiNotes[key] > 0 )
				{
					m_instrument->handleMidiEvent( MidiEvent( MidiNoteOff, midiPort()->realOutputChannel(), key, 0 ), time, offset );
				}
				++m_runningMidiNotes[key];
				m_instrument->handleMidiEvent( MidiEvent( MidiNoteOn, midiPort()->realOutputChannel(), key, event.velocity() ), time, offset );

			}
			m_midiNotesMutex.unlock();
			emit newNote();
			break;

		case MidiNoteOff:
			m_midiNotesMutex.lock();
			m_piano.setKeyState( event.key(), false );	// event.key() = original key

			if( key >= 0 && key < NumKeys && --m_runningMidiNotes[key] <= 0 )
			{
				m_instrument->handleMidiEvent( MidiEvent( MidiNoteOff, midiPort()->realOutputChannel(), key, 0 ), time, offset );
			}
			m_midiNotesMutex.unlock();
			break;

		default:
			m_instrument->handleMidiEvent( transposedEvent, time, offset );
			break;
	}

	// if appropriate, midi-port does futher routing
	m_midiPort.processOutEvent( event, time );
}