-/**
- * Set the formats list to all existing formats.
- * This function behaves like ff_default_query_formats(), except it also
- * accepts channel layouts with unknown disposition. It should only be used
- * with audio filters.
+ /**
+ * Set the formats list to all known channel layouts. This function behaves
+ * like ff_default_query_formats(), except it only accepts known channel
+ * layouts. It should only be used with audio filters.