- add possibility to use midi view

Lib.Midi/Interfaces/IMidiCommunication.cs

@@ -9,7 +9,7 @@ namespace Lib.Midi.Interfaces
 {
     public interface IMidiCommunication
     {
-        void Open();
+        void Open(bool useMidiView);
         void Close();
 
         void Send(IMidiMessage message);

Lib.Midi/MidiCommunication.cs

@@ -15,21 +15,18 @@ namespace Lib.Midi
 {
     public class MidiCommunication : IMidiCommunication
     {
+        private readonly IDriver _driver;
         private readonly IMidiMessageFactory _midiMessageFactory;
-        private readonly MidiIn _midiIn;
-        private readonly MidiOut _midiOut;
+        
+        private MidiIn? _midiIn;
+        private MidiOut? _midiOut;
 
         public MidiCommunication(IDriver driver, IMidiMessageFactory midiMessageFactory)
         {
+            _driver = driver;
             _midiMessageFactory = midiMessageFactory;
-
-            var midiInput = MidiInputs.FirstOrDefault(i => i.midiInCapabilities.ProductId == driver.ProductId);
-            var midiOutput = MidiOutputs.FirstOrDefault(o => o.midiOutCapabilities.ProductId == driver.ProductId);
-            
-            _midiIn = new MidiIn(midiInput.index);
-            _midiOut = new MidiOut(midiOutput.index);
         }
-        
+
         private IEnumerable<(MidiInCapabilities midiInCapabilities, int index)> MidiInputs 
         {
             get
@@ -48,8 +45,17 @@ namespace Lib.Midi
             }
         }
         
-        public void Open()
+        public void Open(bool useMidiView)
         {
+            int inputProductId = useMidiView ? MidiView.INPUT_PRODUCT_ID : _driver.InputProductId;
+            int outputProductId = useMidiView ? MidiView.OUTPUT_PRODUCT_ID : _driver.OutputProductId;
+            
+            var midiInput = MidiInputs.FirstOrDefault(i => i.midiInCapabilities.ProductId == inputProductId);
+            var midiOutput = MidiOutputs.FirstOrDefault(o => o.midiOutCapabilities.ProductId == outputProductId);
+            
+            _midiIn = new MidiIn(midiInput.index);
+            _midiOut = new MidiOut(midiOutput.index);
+            
             _midiIn.MessageReceived += OnMidiInMessageReceived;
             _midiIn.ErrorReceived += OnMidiInErrorReceived;
             _midiIn.Start();
@@ -57,15 +63,18 @@ namespace Lib.Midi
 
         public void Close()
         {
-            _midiIn.Stop();
-            _midiIn.MessageReceived -= OnMidiInMessageReceived;
-            _midiIn.ErrorReceived -= OnMidiInErrorReceived;
-            
-            _midiIn.Close();
-            _midiOut.Close();
+            if (_midiIn != null)
+            {
+                _midiIn.Stop();
+                _midiIn.MessageReceived -= OnMidiInMessageReceived;
+                _midiIn.ErrorReceived -= OnMidiInErrorReceived;
+                _midiIn.Close();
+            }
+
+            _midiOut?.Close();
         }
 
-        public void Send(IMidiMessage message) => _midiOut.Send(message.RawMessage);
+        public void Send(IMidiMessage message) => _midiOut?.Send(message.RawMessage);
         private void OnMidiInMessageReceived(object? sender, MidiInMessageEventArgs args) => MessageReceived?.Invoke(this, _midiMessageFactory.Create(args));
         private void OnMidiInErrorReceived(object? sender, MidiInMessageEventArgs args) => ErrorReceived?.Invoke(this, _midiMessageFactory.Create(args));
 

Lib.Midi/MidiView.cs

@@ -0,0 +1,12 @@
+// Author: Simon Gockner
+// Created: 2021-04-10
+// Copyright(c) 2021 SimonG. All Rights Reserved.
+
+namespace Lib.Midi
+{
+    public class MidiView
+    {
+        public const int INPUT_PRODUCT_ID = 103;
+        public const int OUTPUT_PRODUCT_ID = 102;
+    }
+}