[FFmpeg-cvslog] r21823 - trunk/libavformat/raw.c

[reimar]

Author: reimar
Date: Sun Feb 14 19:59:56 2010
New Revision: 21823

Log:
Optimize h261_probe function, since it is far slower than all others.
About 5 times faster.

Modified:
   trunk/libavformat/raw.c

Modified: trunk/libavformat/raw.c
==============================================================================
--- trunk/libavformat/raw.c	Sun Feb 14 17:51:31 2010	(r21822)
+++ trunk/libavformat/raw.c	Sun Feb 14 19:59:56 2010	(r21823)
@@ -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;