Zaggy1024 b10da81c7c LibVideo: Fast-path converting colors by only matrix coefficients ...

We don't need to run through the whole floating-point color converter
for videos that use sRGB transfer characteristics and BT.709 color
primaries. This commit adds a new templated inlining function to
ColorConverter to do a very fast fixed-point YCbCr to RGB conversion.

With the fast path, frame conversion times go from ~7.8ms down to
~3.7ms. The fast path can benefit a lot more from extra SIMD vector
width, as well.

2023-04-25 17:44:36 -04:00

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