Reduce Memory Copy When Frame Capture Success

Util/StreamUtil.cs

@@ -0,0 +1,24 @@
+using System;
+using System.IO;
+
+namespace ADOFAIRenderer.Util
+{
+    public static class StreamUtil
+    {
+        public static void WriteNativePtrToStream(IntPtr nativePtr, int length, Stream destinationStream)
+        {
+            if (nativePtr == IntPtr.Zero)
+                throw new ArgumentNullException(nameof(nativePtr));
+            if (length <= 0) return;
+
+            unsafe
+            {
+                // Create an unmanaged memory stream that wraps the native pointer
+                // (This does not allocate new memory; it references the existing pointer)
+                using var unmanagedStream = new UnmanagedMemoryStream((byte*)nativePtr, length);
+                // Copy the data directly into your target stream
+                unmanagedStream.CopyTo(destinationStream);
+            }
+        }
+    }
+}