diff options
| -rw-r--r-- | libavformat/format.c | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/libavformat/format.c b/libavformat/format.c index 9d14c67913..15fe167fb2 100644 --- a/libavformat/format.c +++ b/libavformat/format.c @@ -175,6 +175,7 @@ AVInputFormat *av_probe_input_format3(AVProbeData *pd, int is_opened, const static uint8_t zerobuffer[AVPROBE_PADDING_SIZE]; enum nodat { NO_ID3, + ID3_ALMOST_GREATER_PROBE, ID3_GREATER_PROBE, ID3_GREATER_MAX_PROBE, } nodat = NO_ID3; @@ -185,6 +186,8 @@ AVInputFormat *av_probe_input_format3(AVProbeData *pd, int is_opened, 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) { + if (lpd.buf_size < 2LL*id3len + 16) + nodat = ID3_ALMOST_GREATER_PROBE; lpd.buf += id3len; lpd.buf_size -= id3len; } else if (id3len >= PROBE_BUF_MAX) { @@ -203,9 +206,18 @@ AVInputFormat *av_probe_input_format3(AVProbeData *pd, int is_opened, if (score) av_log(NULL, AV_LOG_TRACE, "Probing %s score:%d size:%d\n", fmt1->name, score, lpd.buf_size); if (fmt1->extensions && av_match_ext(lpd.filename, fmt1->extensions)) { - if (nodat == NO_ID3) score = FFMAX(score, 1); - else if (nodat == ID3_GREATER_PROBE) score = FFMAX(score, AVPROBE_SCORE_EXTENSION / 2 - 1); - else score = FFMAX(score, AVPROBE_SCORE_EXTENSION); + switch (nodat) { + case NO_ID3: + score = FFMAX(score, 1); + break; + case ID3_GREATER_PROBE: + case ID3_ALMOST_GREATER_PROBE: + score = FFMAX(score, AVPROBE_SCORE_EXTENSION / 2 - 1); + break; + case ID3_GREATER_MAX_PROBE: + score = FFMAX(score, AVPROBE_SCORE_EXTENSION); + break; + } } } else if (fmt1->extensions) { if (av_match_ext(lpd.filename, fmt1->extensions)) |