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-rw-r--r--libavcodec/mpegvideo.c10
-rw-r--r--libavutil/common.h2
2 files changed, 7 insertions, 5 deletions
diff --git a/libavcodec/mpegvideo.c b/libavcodec/mpegvideo.c
index a6c93c47a8..c7a76597a7 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 b0f0acf3c9..be665a9874 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];