Business.MediaInfoReader.ReadMediaFile C# (CSharp) Метод

        private MediaInfo ReadMediaFile(string fileName) {
            //Initilaizing MediaInfo
            MediaInfo MI = new MediaInfo();

            //From: preparing an example file for reading
            FileStream From = new FileStream(fileName, FileMode.Open, FileAccess.Read);

            //From: preparing a memory buffer for reading
            byte[] From_Buffer = new byte[64 * 1024];
            int From_Buffer_Size; //The size of the read file buffer

            //Preparing to fill MediaInfo with a buffer
            MI.Open_Buffer_Init(From.Length, 0);

            //The parsing loop
            do {
                //Reading data somewhere, do what you want for this.
                From_Buffer_Size = From.Read(From_Buffer, 0, 64 * 1024);

                //Sending the buffer to MediaInfo
                System.Runtime.InteropServices.GCHandle GC = System.Runtime.InteropServices.GCHandle.Alloc(From_Buffer, System.Runtime.InteropServices.GCHandleType.Pinned);
                IntPtr From_Buffer_IntPtr = GC.AddrOfPinnedObject();
                Status Result = (Status)MI.Open_Buffer_Continue(From_Buffer_IntPtr, (IntPtr)From_Buffer_Size);
                GC.Free();
                if ((Result & Status.Finalized) == Status.Finalized)
                    break;

                //Testing if MediaInfo request to go elsewhere
                if (MI.Open_Buffer_Continue_GoTo_Get() != -1) {
                    Int64 Position = From.Seek(MI.Open_Buffer_Continue_GoTo_Get(), SeekOrigin.Begin); //Position the file
                    MI.Open_Buffer_Init(From.Length, Position); //Informing MediaInfo we have seek
                }
            }
            while (From_Buffer_Size > 0);

            //Finalizing
            MI.Open_Buffer_Finalize(); //This is the end of the stream, MediaInfo must finnish some work
            From.Close();

            return MI;
        }
    }