[FFmpeg-devel] [PATCH 02/11] lavu/tx: refactor power-of-two FFT

[Lynne]

This commit refactors the power-of-two FFT, making it faster and 
halving the size of all tables, making the code much smaller on
all systems, and making initialization much faster.
This removes the big/small pass split, because on modern systems
the "big" pass is always faster, and even on older machines there
is no measurable speed difference.

Patch attached.

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