TAG_SUB_IFD      3047 exif/exif.c    			case TAG_SUB_IFD:
TAG_SUB_IFD      3653 exif/exif.c    						entry_tag == TAG_SUB_IFD
TAG_SUB_IFD      3668 exif/exif.c    							case TAG_SUB_IFD:
TAG_SUB_IFD      3679 exif/exif.c    						if (section_index!=SECTION_THUMBNAIL && entry_tag==TAG_SUB_IFD) {