From 5cb5023c78ceb43d02db609db948fce62221b554 Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michaelni@gmx.at>
Date: Tue, 23 Dec 2008 02:34:58 +0000
Subject: [PATCH] Make h264 parser 50% faster.
Originally committed as revision 16286 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
libavcodec/h264_parser.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/libavcodec/h264_parser.c b/libavcodec/h264_parser.c
index e0973bf6e0f..62cd9485959 100644
--- a/libavcodec/h264_parser.c
+++ b/libavcodec/h264_parser.c
@@ -44,6 +44,15 @@ int ff_h264_find_frame_end(H264Context *h, const uint8_t *buf, int buf_size)
for(i=0; i<buf_size; i++){
if(state==7){
+#ifdef HAVE_FAST_UNALIGNED
+# ifdef HAVE_FAST_64BIT
+ while(i<buf_size && !((~*(uint64_t*)(buf+i) & (*(uint64_t*)(buf+i) - 0x0101010101010101ULL)) & 0x8080808080808080ULL))
+ i+=8;
+# else
+ while(i<buf_size && !((~*(uint32_t*)(buf+i) & (*(uint32_t*)(buf+i) - 0x01010101U)) & 0x80808080U))
+ i+=4;
+# endif
+#endif
for(; i<buf_size; i++){
if(!buf[i]){
state=2;
--
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