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avcodec/qtrleenc: fix undefined behaviour

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Fixes #7991.
This commit is contained in:
Paul B Mahol 2019-09-25 17:18:32 +02:00
parent 4a51075f4d
commit f1e17eb446
1 changed files with 4 additions and 3 deletions
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3
libavcodec/qtrleenc.c
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@ -259,8 +259,9 @@ static void qtrle_encode_line(QtrleEncContext *s, const AVFrame *p, int line, ui
/* These bulk costs increase every iteration */
lowest_bulk_cost += s->pixel_size;
sec_lowest_bulk_cost += s->pixel_size;
if (this_line >= p->data[0] + s->pixel_size)
this_line -= s->pixel_size;
if (prev_line >= s->previous_frame->data[0] + s->pixel_size)
prev_line -= s->pixel_size;
}