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ipmovie_probe: speedup by avoiding memcmp() call

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit cc4d80c99f)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer
2012-05-31 16:19:26 +02:00
parent 48094cb23a
commit 0a311df6d9
1 changed files with 2 additions and 1 deletions
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3
libavformat/ipmovie.c
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@@ -529,8 +529,9 @@ static int ipmovie_probe(AVProbeData *p)
uint8_t *b = p->buf; uint8_t *b = p->buf;
uint8_t *b_end = p->buf + p->buf_size - sizeof(signature); uint8_t *b_end = p->buf + p->buf_size - sizeof(signature);
do { do {
if (memcmp(b++, signature, sizeof(signature)) == 0) if (b[0] == signature[0] && memcmp(b, signature, sizeof(signature)) == 0)
return AVPROBE_SCORE_MAX; return AVPROBE_SCORE_MAX;
b++;
} while (b < b_end); } while (b < b_end);
return 0; return 0;