public void RemoveFrame(Id3v2Frame frame)
{
if (frameList.Contains(frame))
{
frameList.Remove(frame);
}
}
public void RemoveFrames(ByteVector id)
{
for (int i = frameList.Count - 1; i >= 0; i--)
{
Id3v2Frame f = (Id3v2Frame)frameList[i];
if (f.FrameId == id)
{
RemoveFrame(f);
}
}
}
protected void Parse(ByteVector data)
{
if (data != null)
{
try
{
int frameDataPosition = 0;
int frameDataLength = data.Count;
// check for extended header
if (header.ExtendedHeader)
{
if (ExtendedHeader == null)
{
extendedHeader = new Id3v2ExtendedHeader();
}
ExtendedHeader.SetData(data);
if (ExtendedHeader.Size <= data.Count)
{
frameDataPosition += (int)ExtendedHeader.Size;
frameDataLength -= (int)ExtendedHeader.Size;
}
}
// check for footer -- we don'type actually need to parse it, as it *must*
// contain the same data as the header, but we do need to account for its
// size.
if (header.FooterPresent && Id3v2Footer.Size <= frameDataLength)
{
frameDataLength -= (int)Id3v2Footer.Size;
}
// parse frames
// Make sure that there is at least enough room in the remaining frame data for
// a frame header.
while (frameDataPosition < frameDataLength - Id3v2FrameHeader.Size(header.MajorVersion))
{
// If the next data is position is 0, assume that we've hit the padding
// portion of the frame data.
if (data[frameDataPosition] == 0)
{
if (header.FooterPresent)
{
TagLibDebugger.Debug("Padding *and* a footer found. This is not allowed by the spec.");
}
return;
}
Id3v2Frame frame = Id3v2FrameFactory.CreateFrame(data.Mid(frameDataPosition), header.MajorVersion);
if (frame == null)
{
return;
}
// Checks to make sure that frame parsed correctly.
if (frame.Size < 0)
{
return;
}
frameDataPosition += (int)(frame.Size + Id3v2FrameHeader.Size(header.MajorVersion));
// Only add frames with content so we don'type send out just we got in.
if (frame.Size > 0)
{
AddFrame(frame);
}
}
}
catch (Exception ex)
{
throw new ApplicationException("There was an error parsing this ID3 tag", ex);
}
}
else
{
throw new ArgumentNullException("data");
}
}
public void AddFrame(Id3v2Frame frame)
{
frameList.Add(frame);
}
public static Id3v2Frame CreateFrame(ByteVector data, uint version)
{
Id3v2FrameHeader header = new Id3v2FrameHeader(data, version);
ByteVector frameId = header.FrameId;
// A quick sanity check -- make sure that the frameId is 4 uppercase
// Latin1 characters. Also make sure that there is data in the frame.
if (frameId == null || frameId.Count != (version < 3 ? 3 : 4) || header.FrameSize < 0)
{
return(null);
}
foreach (byte b in frameId)
{
char c = (char)b;
if ((c < 'A' || c > 'Z') && (c < '1' || c > '9'))
{
return(null);
}
}
// Windows Media Player may create zero byte frames. Just send them
// off as unknown.
if (header.FrameSize == 0)
{
return(new Id3v2UnknownFrame(data, header));
}
// TagLib doesn'type mess with encrypted frames, so just treat them
// as unknown frames.
if (header.Compression)
{
TagLibDebugger.Debug("Compressed frames are currently not supported.");
return(new Id3v2UnknownFrame(data, header));
}
if (header.Encryption)
{
TagLibDebugger.Debug("Encrypted frames are currently not supported.");
return(new Id3v2UnknownFrame(data, header));
}
if (!UpdateFrame(header))
{
header.TagAlterPreservation = true;
return(new Id3v2UnknownFrame(data, header));
}
foreach (FrameCreator creator in frameCreators)
{
Id3v2Frame frame = creator(data, header);
if (frame != null)
{
return(frame);
}
}
// UpdateFrame() might have updated the frame ID.
frameId = header.FrameId;
// This is where things get necissarily nasty. Here we determine which
// Frame subclass (or if none is found simply an Frame) based
// on the frame ID. Since there are a lot of possibilities, that means
// a lot of if blocks.
// Text Identification (frames 4.2)
if (frameId.StartsWith("T"))
{
Id3v2TextIdentificationFrame frame = frameId != "TXXX"
? new Id3v2TextIdentificationFrame(data, header)
: new Id3v2UserTextIdentificationFrame(data, header);
if (useDefaultEncoding)
{
frame.TextEncoding = defaultEncoding;
}
return(frame);
}
// Comments (frames 4.10)
if (frameId == "COMM")
{
Id3v2CommentsFrame frame = new Id3v2CommentsFrame(data, header);
if (useDefaultEncoding)
{
frame.TextEncoding = defaultEncoding;
}
return(frame);
}
// Attached Picture (frames 4.14)
if (frameId == "APIC")
{
Id3v2AttachedPictureFrame f = new Id3v2AttachedPictureFrame(data, header);
if (useDefaultEncoding)
{
f.TextEncoding = defaultEncoding;
}
return(f);
}
// Relative Volume Adjustment (frames 4.11)
if (frameId == "RVA2")
{
return(new Id3v2RelativeVolumeFrame(data, header));
}
// Unique File Identifier (frames 4.1)
if (frameId == "UFID")
{
return(new Id3v2UniqueFileIdentifierFrame(data, header));
}
// Private (frames 4.27)
if (frameId == "PRIV")
{
return(new Id3v2PrivateFrame(data, header));
}
return(new Id3v2UnknownFrame(data, header));
}
public void RemoveFrame(Id3v2Frame frame)
{
if (frameList.Contains(frame))
frameList.Remove(frame);
}
public void AddFrame(Id3v2Frame frame)
{
frameList.Add(frame);
}
