Achamenes.ID3.V1.ID3v1Tag.ReadFromFile C# (CSharp) Метод

        private bool ReadFromFile(FileStream stream)
        {
            if(!stream.CanSeek || !stream.CanRead)
                throw (new ArgumentException("The passed Stream object must support seeking and reading.","stream"));

            if(stream.Length<128)
                return false;

            stream.Seek(stream.Length-128, SeekOrigin.Begin);
            byte[] data=new byte[128];
            if(stream.Read(data, 0, 128)<128)
                return false;

            if(Encoding.GetEncoding("ISO-8859-1").GetString(data, 0, 3).ToLower()!="tag")
                return false;

            Title=Encoding.UTF8.GetString(data, 3, 30).Trim();
            Artist=Encoding.UTF8.GetString(data, 33, 30).Trim();
            Album=Encoding.UTF8.GetString(data, 63, 30).Trim();
            Year=Encoding.UTF8.GetString(data, 93, 4);
            Comment=Encoding.UTF8.GetString(data, 97, 30).Trim();
            GenreCode=data[127];
            if(data[125]==0)
            {
                TrackNumber=data[126];
            }
            return true;
        }

        /// <summary>
        /// Writes the information provided in the TagInformation object
        /// to the given FileStream in ID3v1.1 format.
        /// </summary>
        /// <param name="stream">The FileStream that can read and write to the file. Must also support seeking.</param>
        /// <param name="tag">The TagInformation object containing the tag information. </param>
        private void WriteToFile(FileStream stream)
        {
            if(!(stream.CanRead && stream.CanSeek && stream.CanSeek))
                throw (new ArgumentException("The passed Stream object must support seeking, reading and writing."));

            ID3v1Tag tagInformation=new ID3v1Tag();
            if(!tagInformation.ReadFromFile(stream))
                stream.Seek(stream.Length, SeekOrigin.Begin);
            else
                stream.Seek(stream.Length-128, SeekOrigin.Begin);

            stream.Write(Encoding.GetEncoding("ISO-8859-1").GetBytes("TAG"), 0, 3);
            byte[] b=new byte[0];
            if(Title!="")
                b=Encoding.GetEncoding("ISO-8859-1").GetBytes(Title);
            for(int i=0;i<30;i++)
            {
                if(i<b.Length)
                    stream.WriteByte(b[i]);
                else
                    stream.WriteByte(0);
            }
            b=new byte[0];
            if(Artist!="")
                b=Encoding.GetEncoding("ISO-8859-1").GetBytes(Artist);
            for(int i=0;i<30;i++)
            {
                if(i<b.Length)
                    stream.WriteByte(b[i]);
                else
                    stream.WriteByte(0);
            }
            b=new byte[0];
            if(Album!="")
                b=Encoding.GetEncoding("ISO-8859-1").GetBytes(Album);
            for(int i=0;i<30;i++)
            {
                if(i<b.Length)
                    stream.WriteByte(b[i]);
                else
                    stream.WriteByte(0);
            }
            b=new byte[0];
            if(Year!="")
                b=Encoding.GetEncoding("ISO-8859-1").GetBytes(Year);
            for(int i=0;i<4;i++)
            {
                if(i<b.Length)
                    stream.WriteByte(b[i]);
                else
                    stream.WriteByte(0);
            }
            b=new byte[0];
            if(Comment!="")
                b=Encoding.GetEncoding("ISO-8859-1").GetBytes(Comment);
            for(int i=0;i<28;i++)
            {
                if(i<b.Length)
                    stream.WriteByte(b[i]);
                else
                    stream.WriteByte(0);
            }
            stream.WriteByte(0);
            stream.WriteByte(TrackNumber);
            stream.WriteByte(GenreCode);
        }