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