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swscale: fix crash in 8-bpc bilinear output without alpha.

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We accessed the alpha array even it wasn't used and didn't
exist, hence leading to a NULL pointer segfault.
This commit is contained in:
Ronald S. Bultje 2011-07-08 12:28:28 -07:00
parent f44d50a94c
commit bf2cba4532
1 changed files with 2 additions and 1 deletions
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3
libswscale/swscale.c
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@ -1136,7 +1136,8 @@ yuv2rgb_2_c_template(SwsContext *c, const int16_t *buf[2],
const int16_t *buf0 = buf[0], *buf1 = buf[1],
*ubuf0 = ubuf[0], *ubuf1 = ubuf[1],
*vbuf0 = vbuf[0], *vbuf1 = vbuf[1],
*abuf0 = abuf[0], *abuf1 = abuf[1];
*abuf0 = hasAlpha ? abuf[0] : NULL,
*abuf1 = hasAlpha ? abuf[1] : NULL;
int yalpha1 = 4095 - yalpha;
int uvalpha1 = 4095 - uvalpha;
int i;