Handling AudioBus MIDI Input & State Saving

// ********************************************************** // MARK: - AudioBus MIDI Input // **********************************************************

extension ParentViewController {

func setupAudioBusInput() {
    midiInput = ABMIDIReceiverPort(name: "FM Player MIDI In", title: "FM Player MIDI In") { (port, midiPacketListPointer)  in
        
        let events = AKMIDIEvent.midiEventsFrom(packetListPointer: midiPacketListPointer)
        for event in events {
            guard event.channel == self.midiChannelIn || self.omniMode else { return }
            
            if event.status == AKMIDIStatus.noteOn {
                if event.internalData[2] == 0 {
                    self.conductor.stopNote(note: event.noteNumber!, channel: event.channel!)
                } else {
                    self.conductor.playNote(note: event.noteNumber!, velocity: event.internalData[2], channel: event.channel!)
                }
            }
            
            if event.status == AKMIDIStatus.noteOff {
                guard event.channel == self.midiChannelIn || self.omniMode else { return }
                self.conductor.stopNote(note: event.noteNumber!, channel: event.channel!)
            }
            
            if event.status == AKMIDIStatus.pitchWheel {
                guard event.channel == self.midiChannelIn || self.omniMode else { return }
                let x = MIDIWord(event.internalData[1])
                let y = MIDIWord(event.internalData[2]) << 7
                self.receivedMIDIPitchWheel(y+x, channel: event.channel!)
            }
            
            if event.status == AKMIDIStatus.programChange {
                guard event.channel == self.midiChannelIn || self.omniMode else { return }
                self.receivedMIDIProgramChange(event.data1, channel: event.channel!)
            }
            
            if event.status == AKMIDIStatus.controllerChange {
                guard event.channel == self.midiChannelIn || self.omniMode else { return }
                self.receivedMIDIController(event.data1, value: event.data2, channel: event.channel!)
            }
        }
    }
    Audiobus.client?.controller.addMIDIReceiverPort(midiInput)
    Audiobus.client?.controller.stateIODelegate = self
}

}