Zaggy1024 6e6cc1ddb2 LibVideo/VP9: Make a lookup table for bit reversals ...

Bit reversals are used very often in intra-predicted frames. Turning
these into a constexpr lookup table reduces the branching needed for
block transforms significantly. This reduces the times spent decoding
an intra-heavy 1080p video by about 9% (~14.3s -> ~12.9s).

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

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