Handling AudioBus MIDI Input & State Saving

gistfile1.txt

// **********************************************************
// 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
    }
    
}