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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>
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@ -904,13 +904,14 @@ yuv2ya16_X_c_template(SwsContext *c, const int16_t *lumFilter,
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for (i = 0; i < dstW; i++) {
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for (i = 0; i < dstW; i++) {
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int j;
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int j;
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int64_t Y = 1 << 18;
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int Y = -0x40000000;
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int64_t A = 0xffff<<14;
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int64_t A = 0xffff<<14;
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for (j = 0; j < lumFilterSize; j++)
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for (j = 0; j < lumFilterSize; j++)
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Y += lumSrc[j][i] * lumFilter[j];
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Y += lumSrc[j][i] * lumFilter[j];
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Y >>= 15;
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Y >>= 15;
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Y += (1<<3) + 0x8000;
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Y = av_clip_uint16(Y);
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Y = av_clip_uint16(Y);
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if (hasAlpha) {
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if (hasAlpha) {
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