Wes xx mediapipe integration

Packages/com.github.homuler.mediapipe/Runtime/Scripts/Framework/Packet/FrameAnnotationPacket.cs

@@ -0,0 +1,42 @@
+// 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;
+
+namespace Mediapipe
+{
+  public class FrameAnnotationPacket : Packet<FrameAnnotation>
+  {
+    /// <summary>
+    ///   Creates an empty <see cref="FrameAnnotationPacket" /> instance.
+    /// </summary>
+    public FrameAnnotationPacket() : base(true) { }
+
+    [UnityEngine.Scripting.Preserve]
+    public FrameAnnotationPacket(IntPtr ptr, bool isOwner = true) : base(ptr, isOwner) { }
+
+    public FrameAnnotationPacket At(Timestamp timestamp)
+    {
+      return At<FrameAnnotationPacket>(timestamp);
+    }
+
+    public override FrameAnnotation Get()
+    {
+      UnsafeNativeMethods.mp_Packet__GetFrameAnnotation(mpPtr, out var serializedProto).Assert();
+      GC.KeepAlive(this);
+
+      var frameAnnotation = serializedProto.Deserialize(FrameAnnotation.Parser);
+      serializedProto.Dispose();
+
+      return frameAnnotation;
+    }
+
+    public override StatusOr<FrameAnnotation> Consume()
+    {
+      throw new NotSupportedException();
+    }
+  }
+}