Implement IIrSensorServer GetNpadIrCameraHandle (#663)

* Implement IIrSensorServer GetNpadIrCameraHandle

Resolves #618

* Throw ArgumentOutOfRange instead of IOE

* Revise for changes in later firmware

Based on RE work from 6.1.0

* Nits

Ryujinx.HLE/HOS/Services/Irs/IIrSensorServer.cs

@@ -1,5 +1,7 @@
 using Ryujinx.Common.Logging;
+using Ryujinx.HLE.Exceptions;
 using Ryujinx.HLE.HOS.Ipc;
+using System;
 using System.Collections.Generic;
 
 namespace Ryujinx.HLE.HOS.Services.Irs
@@ -10,14 +12,13 @@ namespace Ryujinx.HLE.HOS.Services.Irs
 
         public override IReadOnlyDictionary<int, ServiceProcessRequest> Commands => _commands;
 
-        private bool _activated;
-
         public IIrSensorServer()
         {
             _commands = new Dictionary<int, ServiceProcessRequest>
             {
-                { 302, ActivateIrsensor   },
-                { 303, DeactivateIrsensor }
+                { 302, ActivateIrsensor      },
+                { 303, DeactivateIrsensor    },
+                { 311, GetNpadIrCameraHandle }
             };
         }
 
@@ -40,5 +41,45 @@ namespace Ryujinx.HLE.HOS.Services.Irs
 
             return 0;
         }
+
+        // GetNpadIrCameraHandle(u32) -> nn::irsensor::IrCameraHandle
+        public long GetNpadIrCameraHandle(ServiceCtx context)
+        {
+            uint npadId = context.RequestData.ReadUInt32();
+
+            if (npadId >= 8 && npadId != 16 && npadId != 32)
+            {
+                return ErrorCode.MakeError(ErrorModule.Hid, 0x2c5);
+            }
+
+            if (((1 << (int)npadId) & 0x1000100FF) == 0)
+            {
+                return ErrorCode.MakeError(ErrorModule.Hid, 0x2c5);
+            }
+
+            int npadTypeId = GetNpadTypeId(npadId);
+
+            context.ResponseData.Write(npadTypeId);
+
+            return 0;
+        }
+
+        private int GetNpadTypeId(uint npadId)
+        {
+            switch(npadId)
+            {
+                case 0:  return 0;
+                case 1:  return 1;
+                case 2:  return 2;
+                case 3:  return 3;
+                case 4:  return 4;
+                case 5:  return 5;
+                case 6:  return 6;
+                case 7:  return 7;
+                case 32: return 8;
+                case 16: return 9;
+                default: throw new ArgumentOutOfRangeException(nameof(npadId));
+            }
+        }
     }
 }