[FFmpeg-cvslog] avutil/mathematics: Document av_rescale_rnd() behavior on non int64 results

[Michael Niedermayer]

ffmpeg | branch: release/4.1 | Michael Niedermayer <michael at niedermayer.cc> | Wed Oct 20 19:51:08 2021 +0200| [fbdeea91025b44954e37056ef5be62a0efe3528c] | committer: Michael Niedermayer

avutil/mathematics: Document av_rescale_rnd() behavior on non int64 results

Reviewed-by: Derek Buitenhuis <derek.buitenhuis at gmail.com>
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit e154353fdb73dc1b3c1519350244d5346f761850)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=fbdeea91025b44954e37056ef5be62a0efe3528c
---

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

diff --git a/libavutil/mathematics.h b/libavutil/mathematics.h
index 54901800ba..64d4137a60 100644
--- a/libavutil/mathematics.h
+++ b/libavutil/mathematics.h
@@ -134,6 +134,7 @@ int64_t av_rescale(int64_t a, int64_t b, int64_t c) av_const;
  *
  * The operation is mathematically equivalent to `a * b / c`, but writing that
  * directly can overflow, and does not support different rounding methods.
+ * If the result is not representable then INT64_MIN is returned.
  *
  * @see av_rescale(), av_rescale_q(), av_rescale_q_rnd()
  */