Get the metadata block at the current position. You can modify the
block but must use FLAC__metadata_simple_iterator_set_block() to
write it back to the FLAC file.
You must call FLAC__metadata_object_delete() on the returned object
when you are finished with it.
\param iterator A pointer to an existing initialized iterator.
\assert
\code iterator != NULL \endcode
\a iterator has been successfully initialized with
FLAC__metadata_simple_iterator_init()
\retval FLAC__StreamMetadata*
The current metadata block, or \c NULL if there was a memory
allocation error.
Get the metadata block at the current position. You can modify the block but must use FLAC__metadata_simple_iterator_set_block() to write it back to the FLAC file.
You must call FLAC__metadata_object_delete() on the returned object when you are finished with it.
\param iterator A pointer to an existing initialized iterator. \assert \code iterator != NULL \endcode \a iterator has been successfully initialized with FLAC__metadata_simple_iterator_init() \retval FLAC__StreamMetadata* The current metadata block, or \c NULL if there was a memory allocation error.