Esempio n. 1
0
        public static ID3v2Footer FromStream(Stream stream)
        {
            if (stream == null)
            {
                throw new ArgumentNullException("stream");
            }
            if (!stream.CanRead)
            {
                throw new ArgumentException("stream not readable");
            }
            if (!stream.CanSeek)
            {
                throw new ArgumentException("stream not seekable");
            }

            BinaryReader reader = new BinaryReader(stream);
            ID3v2Footer  footer;

            byte[] buffer = new byte[FooterLength];
            int    read   = stream.Read(buffer, 0, buffer.Length);

            if (read < 10)
            {
                throw new EndOfStreamException();
            }

            if (buffer[0] == 0x49 && //I
                buffer[1] == 0x44 && //D
                buffer[2] == 0x33)
            {
                footer = new ID3v2Footer();

                footer.Version    = (ID3Version)buffer[3];
                footer.RawVersion = new byte[] { buffer[3], buffer[4] };
                footer.Flags      = (ID3v2HeaderFlags)buffer[5];

                /*footer.DataLength = buffer[6] * (1 << 21);
                 * footer.DataLength += buffer[7] * (1 << 14);
                 * footer.DataLength += buffer[8] * (1 << 7);
                 * footer.DataLength += buffer[9];*/
                footer.DataLength = ID3Utils.ReadInt32(buffer, 6, true);

                return(footer);
            }

            stream.Position -= read;
            return(null);
        }
Esempio n. 2
0
        private bool Parse4(Stream stream)
        {
            if ((_header.Flags & ID3v2HeaderFlags.ExtendedHeader) == ID3v2HeaderFlags.ExtendedHeader)
            {
                _extendedHeader = new ID3v2ExtendedHeader(stream, ID3Version.ID3v2_4);
            }
            if ((_header.Flags & ID3v2HeaderFlags.FooterPresent) == ID3v2HeaderFlags.FooterPresent)
            {
                //footer vom orginal stream lesen - da im neuen stream kein footer vorhanden ist
                _footer = ID3v2Footer.FromStream(_stream);
                if (_footer == null)
                {
                    throw new ID3Exception("Invalid Id3Footer.");
                }
            }
            if (((int)_header.Flags & 0x0F) != 0)
            {
                throw new ID3Exception("Invalid headerflags: 0x{0}.", ((int)_header.Flags).ToString("x"));
            }

            return(true);
        }
Esempio n. 3
0
        public static ID3v2Footer FromStream(Stream stream)
        {
            if (stream == null) throw new ArgumentNullException("stream");
            if (!stream.CanRead) throw new ArgumentException("stream not readable");
            if (!stream.CanSeek) throw new ArgumentException("stream not seekable");

            BinaryReader reader = new BinaryReader(stream);
            ID3v2Footer footer;

            byte[] buffer = new byte[FooterLength];
            int read = stream.Read(buffer, 0, buffer.Length);
            if (read < 10)
                throw new EndOfStreamException();

            if (buffer[0] == 0x49 && //I
               buffer[1] == 0x44 && //D
               buffer[2] == 0x33)
            {
                footer = new ID3v2Footer();

                footer.Version = (ID3Version)buffer[3];
                footer.RawVersion = new byte[] { buffer[3], buffer[4] };
                footer.Flags = (ID3v2HeaderFlags)buffer[5];

                /*footer.DataLength = buffer[6] * (1 << 21);
                footer.DataLength += buffer[7] * (1 << 14);
                footer.DataLength += buffer[8] * (1 << 7);
                footer.DataLength += buffer[9];*/
                footer.DataLength = ID3Utils.ReadInt32(buffer, 6, true);

                return footer;
            }

            stream.Position -= read;
            return null;
        }