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mpegvideo: Avoid 32-bit wrapping of linesize multiplications

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This makes sure that linesize * start_y doesn't overflow, so that
emulated_edge_mc can get back the original value if needed.

Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
Signed-off-by: Martin Storsjö <martin@martin.st>
(cherry picked from commit a711a2cb47)
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
This commit is contained in:
Martin Storsjö
2013-09-04 01:36:51 +03:00
committed by Luca Barbato
parent 68c9904669
commit b01e4d80c6
1 changed files with 2 additions and 1 deletions
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3
libavcodec/mpegvideo_motion.c
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@@ -214,7 +214,8 @@ void mpeg_motion_internal(MpegEncContext *s,
{
uint8_t *ptr_y, *ptr_cb, *ptr_cr;
int dxy, uvdxy, mx, my, src_x, src_y,
uvsrc_x, uvsrc_y, v_edge_pos, uvlinesize, linesize;
uvsrc_x, uvsrc_y, v_edge_pos;
ptrdiff_t uvlinesize, linesize;
#if 0
if(s->quarter_sample)