1 files changed, 60 insertions, 0 deletions
diff --git a/Ryujinx.Audio.Renderer/Utils/SpanMemoryManager.cs b/Ryujinx.Audio.Renderer/Utils/SpanMemoryManager.cs
new file mode 100644
index 00000000..f6cfce0c
--- /dev/null
+++ b/Ryujinx.Audio.Renderer/Utils/SpanMemoryManager.cs
@@ -0,0 +1,60 @@
+//
+// Copyright (c) 2019-2020 Ryujinx
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//
+
+using System;
+using System.Buffers;
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.Audio.Renderer.Utils
+{
+    public sealed unsafe class SpanMemoryManager<T> : MemoryManager<T>
+        where T : unmanaged
+    {
+        private readonly T* _pointer;
+        private readonly int _length;
+
+        public SpanMemoryManager(Span<T> span)
+        {
+            fixed (T* ptr = &MemoryMarshal.GetReference(span))
+            {
+                _pointer = ptr;
+                _length = span.Length;
+            }
+        }
+
+        public override Span<T> GetSpan() => new Span<T>(_pointer, _length);
+
+        public override MemoryHandle Pin(int elementIndex = 0)
+        {
+            if (elementIndex < 0 || elementIndex >= _length)
+            {
+                throw new ArgumentOutOfRangeException(nameof(elementIndex));
+            }
+
+            return new MemoryHandle(_pointer + elementIndex);
+        }
+
+        public override void Unpin() { }
+
+        protected override void Dispose(bool disposing) { }
+
+        public static Memory<T> Cast<TFrom>(Memory<TFrom> memory) where TFrom : unmanaged
+        {
+            return new SpanMemoryManager<T>(MemoryMarshal.Cast<TFrom, T>(memory.Span)).Memory;
+        }
+    }
+}