From 1e1513d01aa8296d55efab95143e65ccbb152c5f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Cl=C3=A9ment=20B=C5=93sch?= <u@pkh.me>
Date: Sat, 18 Mar 2017 23:48:22 +0100
Subject: [PATCH] lavu/mathematics: document so-called "cruft"

---
 libavutil/mathematics.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libavutil/mathematics.c b/libavutil/mathematics.c
index 20ff37f5e9..f378bc73b3 100644
--- a/libavutil/mathematics.c
+++ b/libavutil/mathematics.c
@@ -117,6 +117,7 @@ int64_t av_rescale_rnd(int64_t a, int64_t b, int64_t c, enum AVRounding rnd)
         return t1;
     }
 #else
+        /* reference code doing (a*b + r) / c, requires libavutil/integer.h */
         AVInteger ai;
         ai = av_mul_i(av_int2i(a), av_int2i(b));
         ai = av_add_i(ai, av_int2i(r));