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swscale/yuv2rgb: clip cy, avoid division by 0 with 0 contrast

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Found-by: durandal_1707
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-10-17 13:39:28 +02:00
parent 2db6547237
commit d0a3bc1302
1 changed files with 4 additions and 4 deletions
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8
libswscale/yuv2rgb.c
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@ -768,10 +768,10 @@ av_cold int ff_yuv2rgb_c_init_tables(SwsContext *c, const int inv_table[4],
c->yuv2rgb_u2b_coeff = (int16_t)roundToInt16(cbu << 13);
//scale coefficients by cy
crv = ((crv << 16) + 0x8000) / cy;
cbu = ((cbu << 16) + 0x8000) / cy;
cgu = ((cgu << 16) + 0x8000) / cy;
cgv = ((cgv << 16) + 0x8000) / cy;
crv = ((crv << 16) + 0x8000) / FFMAX(cy, 1);
cbu = ((cbu << 16) + 0x8000) / FFMAX(cy, 1);
cgu = ((cgu << 16) + 0x8000) / FFMAX(cy, 1);
cgv = ((cgv << 16) + 0x8000) / FFMAX(cy, 1);
av_freep(&c->yuvTable);