Wes xx mediapipe integration

Packages/com.github.homuler.mediapipe/Runtime/Scripts/External/SerializedProto.cs

@@ -0,0 +1,32 @@
+// Copyright (c) 2021 homuler
+//
+// Use of this source code is governed by an MIT-style
+// license that can be found in the LICENSE file or at
+// https://opensource.org/licenses/MIT.
+
+using System;
+using System.Runtime.InteropServices;
+
+using pb = Google.Protobuf;
+
+namespace Mediapipe
+{
+  [StructLayout(LayoutKind.Sequential)]
+  internal readonly struct SerializedProto
+  {
+    private readonly IntPtr _str;
+    private readonly int _length;
+
+    public void Dispose()
+    {
+      UnsafeNativeMethods.delete_array__PKc(_str);
+    }
+
+    public T Deserialize<T>(pb::MessageParser<T> parser) where T : pb::IMessage<T>
+    {
+      var bytes = new byte[_length];
+      Marshal.Copy(_str, bytes, 0, bytes.Length);
+      return parser.ParseFrom(bytes);
+    }
+  }
+}