hspace_elem       198 libavfilter/signature_lookup.c     hspace_elem** hspace = av_malloc_array(MAX_FRAMERATE, sizeof(hspace_elem *));
hspace_elem       202 libavfilter/signature_lookup.c         hspace[i] = av_malloc_array(2 * HOUGH_MAX_OFFSET + 1, sizeof(hspace_elem));