Zaggy1024 5e3192c8d9 LibVideo/VP9: Extend the borders on reference frames to avoid branching ...

Extending the borders on reference frames so that motion vectors that
point outside the reference frame allows `predict_inter_block()` to
avoid some branches to clamp the sample coordinates in its loops.

This results in about a 25% improvement in decode time of a motion-
heavy YouTube video (~20.8s -> ~15.6s).

2023-04-14 07:11:45 -04:00

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