add 3rd party folders back

3rd/libomtnet/src/OMTFramePool.cs

@@ -0,0 +1,80 @@
+/*
+* MIT License
+*
+* Copyright (c) 2025 Open Media Transport Contributors
+*
+* Permission is hereby granted, free of charge, to any person obtaining a copy
+* of this software and associated documentation files (the "Software"), to deal
+* in the Software without restriction, including without limitation the rights
+* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+* copies of the Software, and to permit persons to whom the Software is
+* furnished to do so, subject to the following conditions:
+*
+* The above copyright notice and this permission notice shall be included in all
+* copies or substantial portions of the Software.
+*
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+* SOFTWARE.
+*
+*/
+
+using System;
+using System.Collections.Generic;
+
+namespace libomtnet
+{
+    internal class OMTFramePool : OMTBase
+    {
+        Queue<OMTFrame> pool;
+        public OMTFramePool(int count, int maxDataLength, bool resizable)
+        {
+            pool = new Queue<OMTFrame>();
+            for (int i = 0; i < count; i++) {
+                pool.Enqueue(new OMTFrame(maxDataLength, resizable));
+            }
+        }
+
+        protected override void DisposeInternal()
+        {
+            if (pool != null)
+            {
+                foreach (OMTFrame frame in pool)
+                {
+                    if (frame != null)
+                    {
+                        frame.Dispose();
+                    }
+                }
+                pool.Clear();
+            }
+            base.DisposeInternal();
+        }
+
+        public OMTFrame Get()
+        {
+            lock (pool)
+            {
+                if (pool.Count > 0)
+                {
+                    return pool.Dequeue();
+                }                
+            }
+            return null;
+        }
+
+        public void Return(OMTFrame frame)
+        {
+            lock (pool)
+            {
+                pool.Enqueue(frame);
+            }
+        }
+
+        public int Count { get { lock (pool) { return pool.Count; } } }
+    }
+}