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| author | Michael Niedermayer <michael@niedermayer.cc> | 2015-12-01 12:44:23 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2015-12-01 13:26:12 +0100 |
| commit | 25e37f5ea92d4201976a59ae306ce848d257a7e6 (patch) | |
| tree | be19f5a32f13b16c0eddfce01470260b44269c5b | |
| parent | 3a9cb18855d29c96a5d9d2f5ad30448cae3a2ddf (diff) | |
| download | ffmpeg-25e37f5ea92d4201976a59ae306ce848d257a7e6.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>
| -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 fde460cc3e..689325fe4b 100644 --- a/libavutil/mathematics.c +++ b/libavutil/mathematics.c @@ -71,8 +71,8 @@ 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; |