From 74bd039f8cc2edfd869d3feb75be9525b92a431f Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Tue, 24 Jun 2014 18:32:14 +0200 Subject: [PATCH] avformat/nutdec: improve probe speed by 30% Signed-off-by: Michael Niedermayer --- libavformat/nutdec.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/libavformat/nutdec.c b/libavformat/nutdec.c index 7da6f2c441..093ae6376d 100644 --- a/libavformat/nutdec.c +++ b/libavformat/nutdec.c @@ -183,11 +183,11 @@ static int64_t find_startcode(AVIOContext *bc, uint64_t code, int64_t pos) static int nut_probe(AVProbeData *p) { int i; - uint64_t code = 0; - for (i = 0; i < p->buf_size; i++) { - code = (code << 8) | p->buf[i]; - if (code == MAIN_STARTCODE) + for (i = 0; i < p->buf_size-8; i++) { + if (AV_RB32(p->buf+i) != MAIN_STARTCODE>>32) + continue; + if (AV_RB32(p->buf+i+4) == (MAIN_STARTCODE & 0xFFFFFFFF)) return AVPROBE_SCORE_MAX; } return 0;