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| author | Michael Niedermayer <michaelni@gmx.at> | 2013-07-26 04:09:30 +0200 |
|---|---|---|
| committer | Carl Eugen Hoyos <cehoyos@ag.or.at> | 2013-07-26 12:18:46 +0200 |
| commit | 18043e3d2282ec19ff541335b2bb9f2c75a3e270 (patch) | |
| tree | 9fc4026a6dd5acf45494126169f070ed29bae2f1 | |
| parent | ccf470fdb6e3608fbef431e48af7e22266298471 (diff) | |
| download | ffmpeg-18043e3d2282ec19ff541335b2bb9f2c75a3e270.tar.gz | |
avformat/dtsdec: Improve probe, reject things looking like analoge signals
Fixes Ticket2810
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 6663205338f57eedb2392263dde48e2717c6e980)
| -rw-r--r-- | libavformat/dtsdec.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/libavformat/dtsdec.c b/libavformat/dtsdec.c index cdbfc0cd08..23cbe93516 100644 --- a/libavformat/dtsdec.c +++ b/libavformat/dtsdec.c @@ -34,6 +34,7 @@ static int dts_probe(AVProbeData *p) uint32_t state = -1; int markers[3] = {0}; int sum, max; + int64_t diff = 0; buf = p->buf; @@ -54,12 +55,16 @@ static int dts_probe(AVProbeData *p) if (state == DCA_MARKER_14B_LE) if ((bytestream_get_be16(&bufp) & 0xF0FF) == 0xF007) markers[2]++; + + if (buf - p->buf >= 4) + diff += FFABS(AV_RL16(buf) - AV_RL16(buf-4)); } sum = markers[0] + markers[1] + markers[2]; max = markers[1] > markers[0]; max = markers[2] > markers[max] ? 2 : max; if (markers[max] > 3 && p->buf_size / markers[max] < 32*1024 && - markers[max] * 4 > sum * 3) + markers[max] * 4 > sum * 3 && + diff / p->buf_size > 200) return AVPROBE_SCORE_EXTENSION + 1; return 0; |