From 3adcfbbeb51e3e941b0fa8288d202400789eda53 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Reimar=20D=C3=B6ffinger?= <Reimar.Doeffinger@gmx.de>
Date: Sun, 14 Feb 2010 18:59:56 +0000
Subject: [PATCH] Optimize h261_probe function, since it is far slower than all
others. About 5 times faster.
Originally committed as revision 21823 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
libavformat/raw.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/libavformat/raw.c b/libavformat/raw.c
index f4d7bb16c3b..df3b01754d8 100644
--- a/libavformat/raw.c
+++ b/libavformat/raw.c
@@ -497,6 +497,10 @@ static int h261_probe(AVProbeData *p)
init_get_bits(&gb, p->buf, p->buf_size*8);
for(i=0; i<p->buf_size*8; i++){
+ if ((code & 0x01ff0000) || !(code & 0xff00)) {
+ code = (code<<8) + get_bits(&gb, 8);
+ i += 7;
+ } else
code = (code<<1) + get_bits1(&gb);
if ((code & 0xffff0000) == 0x10000) {
int gn= (code>>12)&0xf;
--
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