Wes xx mediapipe integration

Packages/com.github.homuler.mediapipe/Runtime/Scripts/Framework/Port/StatusOrString.cs

@@ -0,0 +1,63 @@
+// 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;
+
+namespace Mediapipe
+{
+  public class StatusOrString : StatusOr<string>
+  {
+    public StatusOrString(IntPtr ptr) : base(ptr) { }
+
+    protected override void DeleteMpPtr()
+    {
+      UnsafeNativeMethods.mp_StatusOrString__delete(ptr);
+    }
+
+    private Status _status;
+    public override Status status
+    {
+      get
+      {
+        if (_status == null || _status.isDisposed)
+        {
+          UnsafeNativeMethods.mp_StatusOrString__status(mpPtr, out var statusPtr).Assert();
+
+          GC.KeepAlive(this);
+          _status = new Status(statusPtr);
+        }
+        return _status;
+      }
+    }
+
+    public override bool Ok()
+    {
+      return SafeNativeMethods.mp_StatusOrString__ok(mpPtr);
+    }
+
+    public override string Value()
+    {
+      var str = MarshalStringFromNative(UnsafeNativeMethods.mp_StatusOrString__value);
+      Dispose(); // respect move semantics
+
+      return str;
+    }
+
+    public byte[] ValueAsByteArray()
+    {
+      UnsafeNativeMethods.mp_StatusOrString__bytearray(mpPtr, out var strPtr, out var size).Assert();
+      GC.KeepAlive(this);
+
+      var bytes = new byte[size];
+      Marshal.Copy(strPtr, bytes, 0, size);
+      UnsafeNativeMethods.delete_array__PKc(strPtr);
+      Dispose();
+
+      return bytes;
+    }
+  }
+}