Achamenes.ID3.Frames.Parsers.FrameHeaderParserM4.Parse C# (CSharp) Метод

        public override FrameHeader Parse(System.IO.Stream stream)
        {
            byte[] header=new byte[10];
            if(stream.Read(header, 0, 10)!=10)
            {
                //TODO Create a new exception class for frame parsing errors.
                throw new FrameParsingException("Could not read frame's header.");
            }

            if(header[0]==0)//reached the padding
            {
                return null;
            }
            int frameSize=0;

            // This is to be compatible with programs that do not compoletely conform
            // to the v2.4 standards.
            if(header[4]>=128 || header[5]>=128 || header[6]>=128 || header[7]>=128)
            {
                frameSize=(int)header[4]*(1<<24)+(int)header[5]*(1<<16)+(int)header[6]*(1<<8)+(int)header[7];
            }
            else
            {
                frameSize=(int)header[4]*(1<<21)+(int)header[5]*(1<<14)+(int)header[6]*(1<<7)+(int)header[7];
            }
            string frameID=Encoding.GetEncoding("ISO-8859-1").GetString(header, 0, 4);
            return new FrameHeader(frameID, frameSize, header[8], header[9]);
        }