may_resolve

Description:

[ Version ( since = "0.2.0" ) ]
public virtual bool may_resolve (Media media, KeyID key_id, List<KeyID> missing_keys)

Checks whether key_id may be resolved with this for media, so that the caller can avoid calling resolve if it can be known in advance it will fail.

If the resolution is known to be impossible because more keys are needed in media, and missing_keys is not NULL, it is populated with the list of GrlKeyID that would be needed.

This function is synchronous and should not block.

Parameters:

this	a source
media	a media on which we want more metadata
key_id	the key corresponding to a metadata we might want
missing_keys	an optional originally empty list

Returns:

TRUE if there's a possibility that this resolves key_id for media, FALSE otherwise.