lua - implement movie.InsertFrame(int index, string logEntry), for now, will only work on .bk2 movies (.bkm and .tasproj will crash)

BizHawk.Client.Common/lua/EmuLuaLibrary.Movie.cs

@@ -14,6 +14,19 @@ namespace BizHawk.Client.Common
 
 		public override string Name { get { return "movie"; } }
 
+		[LuaMethodAttributes(
+			"insertframe",
+			"Inserts a log entry string into the specified index of the movie input log"
+		)]
+		public void InsertFrame(int index, string logEntry)
+		{
+			if (Global.MovieSession.Movie.IsActive)
+			{
+				// TODO: don't make this bk2 specific, and don't expose the log as the means to do this!
+				(Global.MovieSession.Movie as Bk2Movie).Log.Insert(index, logEntry);
+			}
+		}
+
 		[LuaMethodAttributes(
 			"filename",
 			"Returns the file name including path of the currently loaded movie"

BizHawk.Client.Common/movie/bk2/Bk2Movie.cs

@@ -42,6 +42,8 @@ namespace BizHawk.Client.Common
 			}
 		}
 
+		public List<string> Log { get { return _log; } }
+
 		public string Name { get; private set; }
 
 		public virtual string PreferredExtension { get { return Extension; } }