[FFmpeg-devel] avcodec/proresenc_aw : speed improvment

[Martin Vignali]

Hello,

Patch in attach improve prores_aw encoding speed

A basic encoding test (prores to prores)
test file 1 : 137fps -> 140fps
test file 2 : 49fps-> 54 fps

001 : Pre calc codebook switchbits, rice order, exp order and first_exp,
avoid to calc it in encode_codeword func.
002 : small code reorganization in ac coeff func

Martin
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