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swscale/output: Fix undefined shifts 

Fixes: da14e86d8462be6493eab16bc2d40f88/asan_heap-oob_204cfd2_528_cov_340150052_COMPRESS.BMP

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2015-03-25 18:30:00 +01:00
parent 3a6df0b4bb
commit bdcd36a4c8
1 changed files with 2 additions and 2 deletions
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4
libswscale/output.c
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@ -1709,8 +1709,8 @@ yuv2rgb_full_1_c_template(SwsContext *c, const int16_t *buf0,
int A = 0; //init to silence warning
for (i = 0; i < dstW; i++) {
int Y = buf0[i] << 2;
int U = (ubuf0[i] - (128<<7)) << 2;
int V = (vbuf0[i] - (128<<7)) << 2;
int U = (ubuf0[i] - (128<<7)) * 4;
int V = (vbuf0[i] - (128<<7)) * 4;
if (hasAlpha) {
A = (abuf0[i] + 64) >> 7;