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avformat/diracdec: check 2 chunks in probe 

Fixes probetest failure

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-11-10 16:04:33 +01:00
parent 023953e964
commit 2fbc759d08
1 changed files with 12 additions and 3 deletions
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15
libavformat/diracdec.c
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@ -25,10 +25,19 @@
static int dirac_probe(AVProbeData *p)
{
if (AV_RL32(p->buf) == MKTAG('B', 'B', 'C', 'D'))
return AVPROBE_SCORE_MAX;
else
unsigned size;
if (AV_RL32(p->buf) != MKTAG('B', 'B', 'C', 'D'))
return 0;
size = AV_RB32(p->buf+5);
if (size < 13)
return 0;
if (size + 13LL > p->buf_size)
return AVPROBE_SCORE_MAX / 4;
if (AV_RL32(p->buf + size) != MKTAG('B', 'B', 'C', 'D'))
return 0;
return AVPROBE_SCORE_MAX;
}
FF_DEF_RAWVIDEO_DEMUXER(dirac, "raw Dirac", dirac_probe, NULL, AV_CODEC_ID_DIRAC)