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swscale/output: Implement Luma computation from yuv2ya16_X_c_template() without 64bit 

This also reverts 21838cad2f
The revert is in this commit to avoid 2 fate updates

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2019-09-26 17:10:49 +02:00
parent e831f60100
commit 4f4ca675e5
1 changed files with 2 additions and 1 deletions
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3
libswscale/output.c
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@ -904,13 +904,14 @@ yuv2ya16_X_c_template(SwsContext *c, const int16_t *lumFilter,
for (i = 0; i < dstW; i++) {
int j;
int64_t Y = 1 << 18;
int Y = -0x40000000;
int64_t A = 0xffff<<14;
for (j = 0; j < lumFilterSize; j++)
Y += lumSrc[j][i] * lumFilter[j];
Y >>= 15;
Y += (1<<3) + 0x8000;
Y = av_clip_uint16(Y);
if (hasAlpha) {