static int mov_open_dref(ByteIOContext **pb, char *src, MOVDref *ref) { /* try absolute path */ if (!url_fopen(pb, ref->path, URL_RDONLY)) return 0; /* try relative path */ if (ref->nlvl_to > 0 && ref->nlvl_from > 0) { char filename[1024]; char *src_path; int i, l; /* find a source dir */ src_path = strrchr(src, '/'); if (src_path) src_path++; else src_path = src; /* find a next level down to target */ for (i = 0, l = strlen(ref->path) - 1; l >= 0; l--) if (ref->path[l] == '/') { if (i == ref->nlvl_to - 1) break; else i++; } /* compose filename if next level down to target was found */ if (i == ref->nlvl_to - 1) { memcpy(filename, src, src_path - src); filename[src_path - src] = 0; for (i = 1; i < ref->nlvl_from; i++) av_strlcat(filename, "../", 1024); av_strlcat(filename, ref->path + l + 1, 1024); if (!url_fopen(pb, filename, URL_RDONLY)) return 0; } } return AVERROR(ENOENT); };