initial commit of media shit

usm_extract/src/util/RiffCalculatingOffsetDescription.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace VGMToolbox.util
+{
+    public class RiffCalculatingOffsetDescription : CalculatingOffsetDescription
+    {
+        public const string START_OF_STRING = "start of";
+        public const string END_OF_STRING = "end of";
+        
+        public string RelativeLocationToRiffChunkString { set; get; }
+        public string RiffChunkString { set; get; }
+    }
+}