-/**
- * \defgroup filter Filter
- *
- * The structure describing a filter
- *
- * @{
- */
-
-/*
- * BIG FAT WARNING : the code relies in the first 4 members of filter_t
- * and decoder_t to be the same, so if you have anything to add, do it
- * at the end of the structure.
+/** Structure describing a filter
+ * @warning BIG FAT WARNING : the code relies in the first 4 members of
+ * filter_t and decoder_t to be the same, so if you have anything to add,
+ * do it at the end of the structure.