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lavf/img2dec: Improve detection of valid Quickdraw images. 

Detect Quickdraw images without application header with
lower score.
This commit is contained in:
Carl Eugen Hoyos 2015-06-29 16:25:11 +02:00
parent 5a458420e2
commit dee7943819
1 changed files with 9 additions and 3 deletions
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12
libavformat/img2dec.c
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@ -725,9 +725,15 @@ static int qdraw_probe(AVProbeData *p)
{
const uint8_t *b = p->buf;
if (!b[10] && AV_RB32(b+11) == 0x1102ff0c && !b[15] ||
p->buf_size >= 528 && !b[522] && AV_RB32(b+523) == 0x1102ff0c && !b[527])
return AVPROBE_SCORE_EXTENSION + 1;
if ( p->buf_size >= 528
&& (AV_RB64(b + 520) & 0xFFFFFFFFFFFF) == 0x001102ff0c00
&& AV_RB16(b + 520)
&& AV_RB16(b + 518))
return AVPROBE_SCORE_MAX * 3 / 4;
if ( (AV_RB64(b + 8) & 0xFFFFFFFFFFFF) == 0x001102ff0c00
&& AV_RB16(b + 8)
&& AV_RB16(b + 6))
return AVPROBE_SCORE_EXTENSION / 4;
return 0;
}