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

2 files changed, 57 insertions, 0 deletions

diff --git a/src/Ryujinx.HLE/HOS/Kernel/SupervisorCall/ExternalEvent.cs b/src/Ryujinx.HLE/HOS/Kernel/SupervisorCall/ExternalEvent.cs
new file mode 100644
index 00000000..738d6b64
--- /dev/null
+++ b/src/Ryujinx.HLE/HOS/Kernel/SupervisorCall/ExternalEvent.cs
@@ -0,0 +1,25 @@
+using Ryujinx.HLE.HOS.Kernel.Threading;
+using Ryujinx.Horizon.Common;
+
+namespace Ryujinx.HLE.HOS.Kernel.SupervisorCall
+{
+    readonly struct ExternalEvent : IExternalEvent
+    {
+        private readonly KWritableEvent _writableEvent;
+
+        public ExternalEvent(KWritableEvent writableEvent)
+        {
+            _writableEvent = writableEvent;
+        }
+
+        public readonly void Signal()
+        {
+            _writableEvent.Signal();
+        }
+
+        public readonly void Clear()
+        {
+            _writableEvent.Clear();
+        }
+    }
+}
diff --git a/src/Ryujinx.HLE/HOS/Kernel/SupervisorCall/Syscall.cs b/src/Ryujinx.HLE/HOS/Kernel/SupervisorCall/Syscall.cs
index b07f5194..6595ecef 100644
--- a/src/Ryujinx.HLE/HOS/Kernel/SupervisorCall/Syscall.cs
+++ b/src/Ryujinx.HLE/HOS/Kernel/SupervisorCall/Syscall.cs
@@ -8,6 +8,7 @@ using Ryujinx.HLE.HOS.Kernel.Memory;
 using Ryujinx.HLE.HOS.Kernel.Process;
 using Ryujinx.HLE.HOS.Kernel.Threading;
 using Ryujinx.Horizon.Common;
+using Ryujinx.Memory;
 using System;
 using System.Buffers;
 using System.Threading;
@@ -3142,6 +3143,37 @@ namespace Ryujinx.HLE.HOS.Kernel.SupervisorCall
         }
 #pragma warning restore CA1822
 
+        // Not actual syscalls, used by HLE services and such.
+
+        public IExternalEvent GetExternalEvent(int handle)
+        {
+            KWritableEvent writableEvent = KernelStatic.GetCurrentProcess().HandleTable.GetObject<KWritableEvent>(handle);
+
+            if (writableEvent == null)
+            {
+                return null;
+            }
+
+            return new ExternalEvent(writableEvent);
+        }
+
+        public IVirtualMemoryManager GetMemoryManagerByProcessHandle(int handle)
+        {
+            return KernelStatic.GetCurrentProcess().HandleTable.GetKProcess(handle).CpuMemory;
+        }
+
+        public ulong GetTransferMemoryAddress(int handle)
+        {
+            KTransferMemory transferMemory = KernelStatic.GetCurrentProcess().HandleTable.GetObject<KTransferMemory>(handle);
+
+            if (transferMemory == null)
+            {
+                return 0;
+            }
+
+            return transferMemory.Address;
+        }
+
         private static bool IsPointingInsideKernel(ulong address)
         {
             return (address + 0x1000000000) < 0xffffff000;