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| author | Michael Niedermayer <michael@niedermayer.cc> | 2015-12-01 12:44:23 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2015-12-20 10:59:27 +0100 |
| commit | 100dbe1bf007024224c7ae2bb5d1aa956d979722 (patch) | |
| tree | a1f87b0ff38ec035ba3ea4163cee28dd5d407590 | |
| parent | d8a66a150ae1ef88b6d9a43905de0f90f4a1385f (diff) | |
| download | ffmpeg-100dbe1bf007024224c7ae2bb5d1aa956d979722.tar.gz | |
avutil/mathematics: Do not treat INT64_MIN as positive in av_rescale_rnd
The code expects actual positive numbers and gives completely wrong
results if INT64_MIN is treated as positive
Instead clip it into the valid range that is add 1 and treat it as
negative
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 25e37f5ea92d4201976a59ae306ce848d257a7e6)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavutil/mathematics.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/libavutil/mathematics.c b/libavutil/mathematics.c index 126cffc3f0..b1ffd652de 100644 --- a/libavutil/mathematics.c +++ b/libavutil/mathematics.c @@ -76,8 +76,8 @@ int64_t av_rescale_rnd(int64_t a, int64_t b, int64_t c, enum AVRounding rnd) rnd -= AV_ROUND_PASS_MINMAX; } - if (a < 0 && a != INT64_MIN) - return -av_rescale_rnd(-a, b, c, rnd ^ ((rnd >> 1) & 1)); + if (a < 0) + return -av_rescale_rnd(-FFMAX(a, -INT64_MAX), b, c, rnd ^ ((rnd >> 1) & 1)); if (rnd == AV_ROUND_NEAR_INF) r = c / 2; |