From: Michael Niedermayer <michaelni@gmx.at>
Date: Sat, 19 Aug 2006 20:55:02 +0000 (+0000)
Subject: SWAP
X-Git-Tag: v0.5~12082
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=67eca72dc0183025397191dbf93e1e5033354afb;p=platform%2Fupstream%2Flibav.git

SWAP

Originally committed as revision 6030 to svn://svn.ffmpeg.org/ffmpeg/trunk
---

diff --git a/libavcodec/mpegvideo.c b/libavcodec/mpegvideo.c
index a6c93c4..c7a7659 100644
--- a/libavcodec/mpegvideo.c
+++ b/libavcodec/mpegvideo.c
@@ -1687,7 +1687,7 @@ void MPV_frame_end(MpegEncContext *s)
  * @param color color of the arrow
  */
 static void draw_line(uint8_t *buf, int sx, int sy, int ex, int ey, int w, int h, int stride, int color){
-    int t, x, y, fr, f;
+    int x, y, fr, f;
 
     sx= clip(sx, 0, w-1);
     sy= clip(sy, 0, h-1);
@@ -1698,8 +1698,8 @@ static void draw_line(uint8_t *buf, int sx, int sy, int ex, int ey, int w, int h
 
     if(ABS(ex - sx) > ABS(ey - sy)){
         if(sx > ex){
-            t=sx; sx=ex; ex=t;
-            t=sy; sy=ey; ey=t;
+            SWAP(int, sx, ex);
+            SWAP(int, sy, ey);
         }
         buf+= sx + sy*stride;
         ex-= sx;
@@ -1712,8 +1712,8 @@ static void draw_line(uint8_t *buf, int sx, int sy, int ex, int ey, int w, int h
         }
     }else{
         if(sy > ey){
-            t=sx; sx=ex; ex=t;
-            t=sy; sy=ey; ey=t;
+            SWAP(int, sx, ex);
+            SWAP(int, sy, ey);
         }
         buf+= sx + sy*stride;
         ey-= sy;
diff --git a/libavutil/common.h b/libavutil/common.h
index b0f0acf..be665a9 100644
--- a/libavutil/common.h
+++ b/libavutil/common.h
@@ -169,6 +169,8 @@ typedef uint64_t      uint_fast64_t;
 #define FFMAX(a,b) ((a) > (b) ? (a) : (b))
 #define FFMIN(a,b) ((a) > (b) ? (b) : (a))
 
+#define SWAP(type,a,b) do{type SWAP_tmp= b; b= a; a= SWAP_tmp;}while(0)
+
 /* misc math functions */
 extern FF_IMPORT_ATTR const uint8_t ff_log2_tab[256];