f->open = compress_open;
f->close = compress_close;
f->pre_select = generic_filter_pre_select;
f->post_select = compress_post_select;
f->parse_config = compress_parse_config;
f->free_config = compress_free_config;
f->open = compress_open;
f->close = compress_close;
f->pre_select = generic_filter_pre_select;
f->post_select = compress_post_select;
f->parse_config = compress_parse_config;
f->free_config = compress_free_config;