//Retrieves the tag as a byte array. This method does not attempt to read the tag data,
//it simply reads the header and if present the tag bytes are read directly from the
//stream. This means that typical exceptions that get thrown in a tag read will not
//occur in this method.
public byte[] GetTagBytes(int majorVersion, int minorVersion)
{
RegisteredId3Handler registeredHandler = RegisteredHandlers.GetHandler(majorVersion, minorVersion);
byte[] tagBytes = registeredHandler.Handler.GetTagBytes(_stream);
return(tagBytes);
}
/// <summary>
/// Deletes the ID3 tag of the specified version from the MP3 data.
/// </summary>
/// <param name="majorVersion">The major version number.</param>
/// <param name="minorVersion">The minor version number.</param>
public void DeleteTag(int majorVersion, int minorVersion)
{
EnsureWritePermissions(Id3Messages.NoWritePermissions_CannotDeleteTag);
RegisteredId3Handler registeredHandler = ExistingHandlers.GetHandler(majorVersion, minorVersion);
if (registeredHandler != null)
{
registeredHandler.Handler.DeleteTag(_stream);
InvalidateExistingHandlers();
}
}
/// <summary>
/// Deletes the ID3 tag of the specified tag family type from the MP3 data.
/// </summary>
/// <param name="family">The ID3 tag family type.</param>
public void DeleteTag(Id3TagFamily family)
{
EnsureWritePermissions(Id3Messages.NoWritePermissions_CannotDeleteTag);
IEnumerable <RegisteredId3Handler> registeredHandlers = ExistingHandlers.GetHandlers(family);
RegisteredId3Handler registeredHandler = registeredHandlers.FirstOrDefault();
if (registeredHandler != null)
{
Id3Handler handler = registeredHandler.Handler;
handler.DeleteTag(_stream);
InvalidateExistingHandlers();
}
}
/// <summary>
/// Retrieves an ID3 tag of the specified tag family type - version 2.x or version 1.x.
/// </summary>
/// <param name="family">The ID3 tag family type required.</param>
/// <returns>The ID3 tag of the specified tag family type, or null if it doesn't exist.</returns>
public Id3Tag GetTag(Id3TagFamily family)
{
IEnumerable <RegisteredId3Handler> familyHandlers = ExistingHandlers.GetHandlers(family);
RegisteredId3Handler familyHandler = familyHandlers.FirstOrDefault();
if (familyHandler == null)
{
return(null);
}
Id3Handler handler = familyHandler.Handler;
Id3Tag tag = handler.ReadTag(_stream);
return(tag);
}
public bool WriteTag(Id3Tag tag, WriteConflictAction conflictAction = WriteConflictAction.NoAction)
{
EnsureWritePermissions(Id3Messages.NoWritePermissions_CannotWriteTag);
if (tag == null)
{
throw new ArgumentNullException("tag");
}
//The tag should specify major version number
if (tag.MajorVersion == 0)
{
throw new ArgumentException(Id3Messages.MajorTagVersionMissing, "tag");
}
//Get any existing handlers from the same family as the tag
IEnumerable <RegisteredId3Handler> familyHandlers = ExistingHandlers.GetHandlers(tag.Family);
//If a tag already exists from the same family, but is a different version than the passed tag,
//delete it if conflictAction is Replace.
RegisteredId3Handler familyHandler = familyHandlers.FirstOrDefault();
if (familyHandler != null)
{
Id3Handler handler = familyHandler.Handler;
if (handler.MajorVersion != tag.MajorVersion || handler.MinorVersion != tag.MinorVersion)
{
if (conflictAction == WriteConflictAction.NoAction)
{
return(false);
}
if (conflictAction == WriteConflictAction.Replace)
{
Id3Handler handlerCopy = handler;
handlerCopy.DeleteTag(_stream);
}
}
}
//Write the tag to the file. The handler will know how to overwrite itself.
RegisteredId3Handler registeredHandler = RegisteredHandlers.GetHandler(tag.MajorVersion, tag.MinorVersion);
bool writeSuccessful = registeredHandler.Handler.WriteTag(_stream, tag);
if (writeSuccessful)
{
InvalidateExistingHandlers();
}
return(writeSuccessful);
}
//Converts an ID3 tag to another version after resolving the differences between the two
//versions. The resultant tag will have all the frames from the source tag, but those
//frames not recognized in the new version will be treated as UnknownFrame objects.
//Similarly, frames recognized in the output tag version, but not in the source version are
//converted accordingly.
public Id3Tag ConvertTo(int majorVersion, int minorVersion)
{
if (MajorVersion == majorVersion && MinorVersion == minorVersion)
{
return(this);
}
RegisteredId3Handler sourceHandler = Mp3Stream.RegisteredHandlers.GetHandler(MajorVersion, MinorVersion);
if (sourceHandler == null)
{
return(null);
}
RegisteredId3Handler destinationHandler = Mp3Stream.RegisteredHandlers.GetHandler(majorVersion, minorVersion);
if (destinationHandler == null)
{
return(null);
}
Id3Tag destinationTag = destinationHandler.Handler.CreateTag();
foreach (Id3Frame sourceFrame in Frames)
{
var unknownFrame = sourceFrame as UnknownFrame;
if (unknownFrame != null)
{
string frameId = unknownFrame.Id;
Id3Frame destinationFrame = destinationHandler.Handler.GetFrameFromFrameId(frameId);
destinationTag.Frames.Add(destinationFrame);
}
else
{
destinationTag.Frames.Add(sourceFrame);
}
}
return(destinationTag);
}
/// <summary>
/// Retrieves an ID3 tag of the specified version number.
/// </summary>
/// <param name="majorVersion">The major version number.</param>
/// <param name="minorVersion">The minor version number</param>
/// <returns>The ID3 tag of the specified version number, or null if it doesn't exist.</returns>
public Id3Tag GetTag(int majorVersion, int minorVersion)
{
RegisteredId3Handler registeredHandler = ExistingHandlers.GetHandler(majorVersion, minorVersion);
return(registeredHandler != null?registeredHandler.Handler.ReadTag(_stream) : null);
}
