AVInputFormat *av_probe_input_format2(AVProbeData *pd, int is_opened, int *score_max) { AVProbeData lpd = *pd; AVInputFormat *fmt1 = NULL, *fmt; int score, id3 = 0; if (lpd.buf_size > 10 && ff_id3v2_match(lpd.buf, ID3v2_DEFAULT_MAGIC)) { int id3len = ff_id3v2_tag_len(lpd.buf); if (lpd.buf_size > id3len + 16) { lpd.buf += id3len; lpd.buf_size -= id3len; } id3 = 1; } fmt = NULL; while ((fmt1 = av_iformat_next(fmt1))) { if (!is_opened == !(fmt1->flags & AVFMT_NOFILE)) continue; score = 0; if (fmt1->read_probe) { score = fmt1->read_probe(&lpd); } else if (fmt1->extensions) { if (av_match_ext(lpd.filename, fmt1->extensions)) { score = 50; } } if (score > *score_max) { *score_max = score; fmt = fmt1; }else if (score == *score_max) fmt = NULL; } /* a hack for files with huge id3v2 tags -- try to guess by file extension. */ if (!fmt && id3 && *score_max < AVPROBE_SCORE_MAX/4) { while ((fmt = av_iformat_next(fmt))) if (fmt->extensions && av_match_ext(lpd.filename, fmt->extensions)) { *score_max = AVPROBE_SCORE_MAX/4; break; } } return fmt; }
AVInputFormat *av_probe_input_format2(AVProbeData *pd, int is_opened, int *score_max) { AVProbeData lpd = *pd; AVInputFormat *fmt1 = NULL, *fmt; int score, id3 = 0; if (lpd.buf_size > 10 && ff_id3v2_match(lpd.buf, ID3v2_DEFAULT_MAGIC)) { int id3len = ff_id3v2_tag_len(lpd.buf); if (lpd.buf_size > id3len + 16) { lpd.buf += id3len; lpd.buf_size -= id3len; } id3 = 1; } fmt = NULL; while ((fmt1 = av_iformat_next(fmt1))) { if (!is_opened == !(fmt1->flags & AVFMT_NOFILE)) continue; score = 0; if (fmt1->read_probe) { score = fmt1->read_probe(&lpd); } else if (fmt1->extensions) { if (av_match_ext(lpd.filename, fmt1->extensions)) { score = 50; } } if (score > *score_max) { *score_max = score; fmt = fmt1; }else if (score == *score_max) fmt = NULL; }   if (!fmt && id3 && *score_max < AVPROBE_SCORE_MAX/4) { while ((fmt = av_iformat_next(fmt))) if (fmt->extensions && av_match_ext(lpd.filename, fmt->extensions)) { *score_max = AVPROBE_SCORE_MAX/4; break; } } return fmt; }