xiph / rav1e / 2102

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travis-ci

Store restoration units contiguously

The "matrix" of restoration units was stored in a vector of vectors.

To avoids an additional indirection for each row, store them in a
contiguous array instead. Besides the (theoretical) performance benerit
for every access, this will simplify the implementation of tiled-views
which have to expose non-overlapping parts of the "matrix" via unsafe
code.

Also, since its size is constant (although not known at compile-time),
replace the vector by a boxed slice.

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