Read all metadata from a FLAC file into the chain.
\param chain A pointer to an existing chain.
\param filename The path to the FLAC file to read.
\assert
\code chain != NULL \endcode
\code filename != NULL \endcode
\retval FLAC__bool
\c true if a valid list of metadata blocks was read from
\a filename, else \c false. On failure, check the status with
FLAC__metadata_chain_status().
Read all metadata from a FLAC file into the chain.
\param chain A pointer to an existing chain. \param filename The path to the FLAC file to read. \assert \code chain != NULL \endcode \code filename != NULL \endcode \retval FLAC__bool \c true if a valid list of metadata blocks was read from \a filename, else \c false. On failure, check the status with FLAC__metadata_chain_status().