avcodec/mpc8: Reduce the size of the length tables to initialize VLCs
After permuting both length, code as well as symbol tables so that
the codes are ordered from left to right in the tree, it became apparent
that the length of the codes decreases from left to right. Therefore one
can run-length encode the lengths to save space. This commit implements
this.
Signed-off-by: NAndreas Rheinhardt <andreas.rheinhardt@gmail.com>
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