Direct the decoder to filter out all metadata blocks of type \a type.
\default By default, only the \c STREAMINFO block is returned via the
metadata callback.
\param decoder A decoder instance to set.
\param type See above.
\assert
\code decoder != NULL \endcode
\a type is valid
\retval FLAC__bool
\c false if the decoder is already initialized, else \c true.
Direct the decoder to filter out all metadata blocks of type \a type.
\default By default, only the \c STREAMINFO block is returned via the metadata callback. \param decoder A decoder instance to set. \param type See above. \assert \code decoder != NULL \endcode \a type is valid \retval FLAC__bool \c false if the decoder is already initialized, else \c true.