private bool ReadData(Stream stream, bool readData)
{
if ((_header = ID3v2Header.FromStream(stream)) != null)
{
byte[] buffer = new byte[_header.DataLength];
if (stream.Read(buffer, 0, buffer.Length) < buffer.Length)
{
return(false);
}
if (_header.IsUnsync && _header.Version != ID3Version.ID3v2_4)
{
buffer = UnSyncBuffer(buffer);
}
_content = buffer;
MemoryStream contentStream = new MemoryStream(buffer);
switch (_header.Version)
{
case ID3Version.ID3v2_2:
Parse2(contentStream);
break;
case ID3Version.ID3v2_3:
Parse3(contentStream);
break;
case ID3Version.ID3v2_4:
Parse4(contentStream);
break;
default:
throw new ID3Exception("Invalid Version: [2.{0};{1}]", _header.RawVersion[0], _header.RawVersion[1]);
}
if (readData)
{
ReadFrames(contentStream);
}
contentStream.Dispose();
return(true);
}
else
{
Debug.WriteLine("ID3v2::ReadData: No ID3v2 Header found.");
return(false);
}
}
public static ID3v2Header 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);
ID3v2Header header;
byte[] buffer = new byte[HeaderLength];
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)
{
header = new ID3v2Header();
header.Version = (ID3Version)buffer[3];
header.RawVersion = new byte[] { buffer[3], buffer[4] };
header.Flags = (ID3v2HeaderFlags)buffer[5];
/*header.DataLength = buffer[6] * (1 << 21);
* header.DataLength += buffer[7] * (1 << 14);
* header.DataLength += buffer[8] * (1 << 7);
* header.DataLength += buffer[9];
*/
header.DataLength = ID3Utils.ReadInt32(buffer, 6, true);
return(header);
}
stream.Position -= read;
return(null);
}
public static ID3v2Header 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);
ID3v2Header header;
byte[] buffer = new byte[HeaderLength];
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)
{
header = new ID3v2Header();
header.Version = (ID3Version)buffer[3];
header.RawVersion = new byte[] { buffer[3], buffer[4] };
header.Flags = (ID3v2HeaderFlags)buffer[5];
/*header.DataLength = buffer[6] * (1 << 21);
header.DataLength += buffer[7] * (1 << 14);
header.DataLength += buffer[8] * (1 << 7);
header.DataLength += buffer[9];
*/
header.DataLength = ID3Utils.ReadInt32(buffer, 6, true);
return header;
}
stream.Position -= read;
return null;
}