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avfilter/f_select: fix loss of precission in SAD calculation

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Fixes part of Ticket3466
Found-by: Andrey_Karpov / PVS-Studio
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 5a8ef3c66b)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer
2014-04-16 02:06:37 +02:00
parent fc5b32877a
commit 83fb31a76d
2 changed files with 5 additions and 5 deletions
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2
libavfilter/f_select.c
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@@ -279,7 +279,7 @@ static double get_scene_score(AVFilterContext *ctx, AVFrame *frame)
p2 += 8 * linesize;
}
emms_c();
mafd = nb_sad ? sad / nb_sad : 0;
mafd = nb_sad ? (double)sad / nb_sad : 0;
diff = fabs(mafd - select->prev_mafd);
ret = av_clipf(FFMIN(mafd, diff) / 100., 0, 1);
select->prev_mafd = mafd;