[tremor] MDCT_lookup tables reduced by one third.

[timmy brolin]

Tnx for the help with CVS, I did check the links and stuff on xiph, but the only I could find was *nix specific instructions, links and downloads.

Monty: I see that you did pretty much the same thing as I did when I removed the global 'step', however, I did two things differently:
1: There is no need for "mdct_butterflies" to have a step argument, since step can be easily calculated from init.log2n
step=1<<(13-init.log2n);
2: In "mdct_butterfly_generic" step should really be a register, it is used all over the place.

My code w/o the global 'step' is here: (It's not changed since yesterday)
http://194.47.15.142/~timmy/mdct2.zip

By the way... What are the other four trignometric functions in mdct_lookup.h? It's hard to figure them out by just looking att the numbers and curves. (sine/cosine was pretty obvious thou..)
Some parts of the tremor code are far from well commented/documented... :-/


--
Timmy

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