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avcodec/dvdsubdec: Fixes 2 runtime error: left shift of 170 by 24 places cannot be represented in type 'int' 

Fixes: 619/clusterfuzz-testcase-5803914534322176

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 61ee2ca775)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-04-07 03:36:17 +02:00
parent a0a20e6994
commit 4b6a747c2a
1 changed files with 2 additions and 2 deletions
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4
libavcodec/dvdsubdec.c
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@ -186,12 +186,12 @@ static void guess_palette(DVDSubContext* ctx,
r = (((subtitle_color >> 16) & 0xff) * level) >> 8;
g = (((subtitle_color >> 8) & 0xff) * level) >> 8;
b = (((subtitle_color >> 0) & 0xff) * level) >> 8;
rgba_palette[i] = b | (g << 8) | (r << 16) | ((alpha[i] * 17) << 24);
rgba_palette[i] = b | (g << 8) | (r << 16) | ((alpha[i] * 17U) << 24);
color_used[colormap[i]] = (i + 1);
j++;
} else {
rgba_palette[i] = (rgba_palette[color_used[colormap[i]] - 1] & 0x00ffffff) |
((alpha[i] * 17) << 24);
((alpha[i] * 17U) << 24);
}
}
}