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avcodec/xpmdec: fix small artifacts

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The max size of uint8_t subset is 223 not 220.
This commit is contained in:
Paul B Mahol 2018-12-10 21:31:18 +01:00
parent 6a20876b62
commit 00502370f6
1 changed files with 2 additions and 2 deletions
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4
libavcodec/xpmdec.c
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@ -293,7 +293,7 @@ static int ascii2index(const uint8_t *cpixel, int cpp)
if (*p < ' ' || *p > 0xfe)
return AVERROR_INVALIDDATA;
n += (*p++ - ' ') * m;
m *= 220;
m *= 223;
}
return n;
}
@ -346,7 +346,7 @@ static int xpm_decode_frame(AVCodecContext *avctx, void *data,
size = 1;
for (i = 0; i < cpp; i++)
size *= 220;
size *= 223;
if (ncolors <= 0 || ncolors > size) {
av_log(avctx, AV_LOG_ERROR, "invalid number of colors: %d\n", ncolors);