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mpegvideo: fix out of heap array accesses

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-06-06 19:26:21 +02:00
parent 92c065f93f
commit 317ca0d3f7
1 changed files with 2 additions and 2 deletions
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4
libavcodec/mpegvideo.c
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@ -1436,7 +1436,7 @@ static void draw_line(uint8_t *buf, int sx, int sy, int ex, int ey,
y = (x * f) >> 16;
fr = (x * f) & 0xFFFF;
buf[y * stride + x] += (color * (0x10000 - fr)) >> 16;
buf[(y + 1) * stride + x] += (color * fr ) >> 16;
if(fr) buf[(y + 1) * stride + x] += (color * fr ) >> 16;
}
} else {
if (sy > ey) {
@ -1453,7 +1453,7 @@ static void draw_line(uint8_t *buf, int sx, int sy, int ex, int ey,
x = (y*f) >> 16;
fr = (y*f) & 0xFFFF;
buf[y * stride + x] += (color * (0x10000 - fr)) >> 16;
buf[y * stride + x + 1] += (color * fr ) >> 16;
if(fr) buf[y * stride + x + 1] += (color * fr ) >> 16;
}
}
}