FFABSDIFF(a,b) expands to effectively abs((int)a-(int)b). Note that this is not safe in general as it makes assumptions on the widths. This macro is useful across at least 3 places in the codebase, and is therefore placed in avutil/common.
Signed-off-by: Ganesh Ajjanagadde <gajjanaga...@gmail.com> --- libavutil/common.h | 1 + 1 file changed, 1 insertion(+) diff --git a/libavutil/common.h b/libavutil/common.h index 3e62b6d..ad27405 100644 --- a/libavutil/common.h +++ b/libavutil/common.h @@ -59,6 +59,7 @@ #define FFUDIV(a,b) (((a)>0 ?(a):(a)-(b)+1) / (b)) #define FFUMOD(a,b) ((a)-(b)*FFUDIV(a,b)) #define FFABS(a) ((a) >= 0 ? (a) : (-(a))) +#define FFABSDIFF(a,b) (abs((int)(a)-(int)(b))) /* assume no overflow */ #define FFSIGN(a) ((a) > 0 ? 1 : -1) #define FFMAX(a,b) ((a) > (b) ? (a) : (b)) -- 2.5.0 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
