Migrate Audio service to new IPC (#6285)

* Migrate audren to new IPC

* Migrate audout

* Migrate audin

* Migrate hwopus

* Bye bye old audio service

* Switch volume control to IHardwareDeviceDriver

* Somewhat unrelated changes

* Remove Concentus reference from HLE

* Implement OpenAudioRendererForManualExecution

* Remove SetVolume/GetVolume methods that are not necessary

* Remove SetVolume/GetVolume methods that are not necessary (2)

* Fix incorrect volume update

* PR feedback

* PR feedback

* Stub audrec

* Init outParameter

* Make FinalOutputRecorderParameter/Internal readonly

* Make FinalOutputRecorder IDisposable

* Fix HardwareOpusDecoderManager parameter buffers

* Opus work buffer size and error handling improvements

* Add AudioInProtocolName enum

* Fix potential divisions by zero

src/Ryujinx.Horizon.Common/IExternalEvent.cs

@@ -0,0 +1,10 @@
+using System;
+
+namespace Ryujinx.Horizon.Common
+{
+    public interface IExternalEvent
+    {
+        void Signal();
+        void Clear();
+    }
+}

src/Ryujinx.Horizon.Common/ISyscallApi.cs

@@ -1,3 +1,4 @@
+using Ryujinx.Memory;
 using System;
 
 namespace Ryujinx.Horizon.Common
@@ -29,5 +30,9 @@ namespace Ryujinx.Horizon.Common
         Result CreatePort(out int serverPortHandle, out int clientPortHandle, int maxSessions, bool isLight, string name);
         Result ManageNamedPort(out int handle, string name, int maxSessions);
         Result ConnectToPort(out int clientSessionHandle, int clientPortHandle);
+
+        IExternalEvent GetExternalEvent(int handle);
+        IVirtualMemoryManager GetMemoryManagerByProcessHandle(int handle);
+        ulong GetTransferMemoryAddress(int handle);
     }
 }

src/Ryujinx.Horizon.Common/Result.cs

@@ -36,6 +36,11 @@ namespace Ryujinx.Horizon.Common
             ErrorCode = module | (description << ModuleBits);
         }
 
+        public Result(int errorCode)
+        {
+            ErrorCode = errorCode;
+        }
+
         public readonly override bool Equals(object obj)
         {
             return obj is Result result && result.Equals(this);