apply_filters( 'bp_activity_get_sitewide' )

Pass filters as an array: array( ‘user_id’ => false, // user_id to filter on ‘object’ => false, // object to filter on e.g. groups, profile, status, friends ‘action’ => false, // action to filter on e.g. new_wire_post, new_forum_post, profile_updated ‘primary_id’ => false, // object ID to filter on e.g. a group_id or forum_id or blog_id etc.