fix: filter secondary audio tielines so that routing works correctly

src/NvxEpi/Features/Routing/NvxGlobalRouter.cs

@@ -1,14 +1,14 @@
-using System;
-using System.Collections.Generic;
-using PepperDash.Core;
-using System.Linq;
-using NvxEpi.Abstractions;
+using NvxEpi.Abstractions;
+using NvxEpi.Abstractions.SecondaryAudio;
+using NvxEpi.Devices;
 using NvxEpi.Services.TieLines;
 using NvxEpi.Services.Utilities;
+using PepperDash.Core;
 using PepperDash.Essentials.Core;
 using PepperDash.Essentials.Core.Routing;
-using NvxEpi.Abstractions.SecondaryAudio;
-using NvxEpi.Devices;
+using System;
+using System.Collections.Generic;
+using System.Linq;
 
 namespace NvxEpi.Features.Routing;
 
@@ -68,13 +68,15 @@ private static void BuildTieLines()
  var audioTransmitters = DeviceManager
  .AllDevices
  .OfType<INvxDevice>()
+ .Where(t => t.IsTransmitter)
  .ToList();
 
  TieLineConnector.AddTieLinesForAudioTransmitters(audioTransmitters);
 
  var audioReceivers = DeviceManager
  .AllDevices
  .OfType<INvxDevice>()
+ .Where(t => !t.IsTransmitter)
  .ToList();
 
  TieLineConnector.AddTieLinesForAudioReceivers(audioReceivers);
@@ -144,19 +146,19 @@ private void BuildMatrixRouting()
 
  public void Route(string inputSlotKey, string outputSlotKey, eRoutingSignalType type)
  {
- if(!InputSlots.TryGetValue(inputSlotKey, out var inputSlot))
+ if (!InputSlots.TryGetValue(inputSlotKey, out var inputSlot))
  {
  Debug.Console(0, this, "Unable to find input slot with key {0}", inputSlotKey);
  return;
  }
 
- if(!OutputSlots.TryGetValue(outputSlotKey, out var outputSlot))
+ if (!OutputSlots.TryGetValue(outputSlotKey, out var outputSlot))
  {
  Debug.Console(0, this, "Unable to find output slot with key {0}", outputSlotKey);
  return;
  }
 
- if(outputSlot is not NvxMatrixOutput output)
+ if (outputSlot is not NvxMatrixOutput output)
  {
  Debug.LogMessage(Serilog.Events.LogEventLevel.Error, "Output with key {key} is not NvxMatrixOutput", this, outputSlotKey);
  return;
@@ -170,13 +172,13 @@ public void Route(string inputSlotKey, string outputSlotKey, eRoutingSignalType
  return;
  }
 
- if(type.Has(eRoutingSignalType.Video))
+ if (type.Has(eRoutingSignalType.Video))
  {
- // using namespace to qualify type as `Route` is a static method
- Routing.PrimaryStreamRouter.Route(inputSlot.SlotNumber, outputDevice); 
+  // using namespace to qualify type as `Route` is a static method
+  Routing.PrimaryStreamRouter.Route(inputSlot.SlotNumber, outputDevice);
  }
 
- if((type.Has(eRoutingSignalType.SecondaryAudio)
+ if ((type.Has(eRoutingSignalType.SecondaryAudio)
  || type.Has(eRoutingSignalType.Audio))
  && outputDevice is ISecondaryAudioStreamWithHardware audioOutput)
  {