ipmovie_probe: speedup by avoiding memcmp() call

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
13 years ago · cc4d80c99f
parent ebfe0c6eb8
commit cc4d80c99f
1 changed files with 2 additions and 1 deletions
--- a/libavformat/ipmovie.c
+++ b/libavformat/ipmovie.c
@ -529,8 +529,9 @@ static int ipmovie_probe(AVProbeData *p)
    uint8_t *b = p->buf;
    uint8_t *b_end = p->buf + p->buf_size - sizeof(signature);
    do {
-        if (memcmp(b++, signature, sizeof(signature)) == 0)
+        if (b[0] == signature[0] && memcmp(b, signature, sizeof(signature)) == 0)
            return AVPROBE_SCORE_MAX;
+        b++;
    } while (b < b_end);

    return 0;