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);
}
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);
}
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;
}
