Wes xx mediapipe integration

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

@@ -0,0 +1,62 @@
+// 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 SidePacket : MpResourceHandle
+  {
+    public SidePacket() : base()
+    {
+      UnsafeNativeMethods.mp_SidePacket__(out var ptr).Assert();
+      this.ptr = ptr;
+    }
+
+    protected override void DeleteMpPtr()
+    {
+      UnsafeNativeMethods.mp_SidePacket__delete(ptr);
+    }
+
+    public int size => SafeNativeMethods.mp_SidePacket__size(mpPtr);
+
+    /// <remarks>
+    ///   This method cannot verify that the packet type corresponding to the <paramref name="key" /> is indeed a <typeparamref name="TPacket" />,
+    ///   so you must make sure by youreself that it is.
+    /// </remarks>
+    public TPacket At<TPacket, TValue>(string key) where TPacket : Packet<TValue>, new()
+    {
+      UnsafeNativeMethods.mp_SidePacket__at__PKc(mpPtr, key, out var packetPtr).Assert();
+
+      if (packetPtr == IntPtr.Zero)
+      {
+        return default; // null
+      }
+      GC.KeepAlive(this);
+      return Packet<TValue>.Create<TPacket>(packetPtr, true);
+    }
+
+    public void Emplace<T>(string key, Packet<T> packet)
+    {
+      UnsafeNativeMethods.mp_SidePacket__emplace__PKc_Rp(mpPtr, key, packet.mpPtr).Assert();
+      packet.Dispose(); // respect move semantics
+      GC.KeepAlive(this);
+    }
+
+    public int Erase(string key)
+    {
+      UnsafeNativeMethods.mp_SidePacket__erase__PKc(mpPtr, key, out var count).Assert();
+
+      GC.KeepAlive(this);
+      return count;
+    }
+
+    public void Clear()
+    {
+      SafeNativeMethods.mp_SidePacket__clear(mpPtr);
+    }
+  }
+}