Replace Throttle Busy Wait With Dequeue Signal And Byte Limit

Util/FrameReader.cs

@@ -73,6 +73,16 @@ namespace ADOFAIRenderer.Util
             }
         }
 
+        /// <summary>
+        /// Bytes of the readback buffer of one frame: Width x Height x 3 / 2 when the GPU conversion to NV12 / YUV420P
+        /// is used, Width x Height x 4 (RGBA) otherwise. The same size as ReadbackRequestState.Setup uses.
+        /// </summary>
+        public long GetFrameBufferBytes(int width, int height)
+        {
+            var pixels = (long)width * height;
+            return _useGPUConversion ? pixels * 3 / 2 : pixels * 4;
+        }
+
         public void RequestFrameCapture(Texture texture, long currentFrame)
         {
             if (!RenderManager.IsCapturingActive) return;