[FFmpeg-devel] avcodec/proresenc_aw improvements

[Martin Vignali]

Hello,

Patch in attach improve some part of the prores_aw encoder.

001 : use scantable in prores_data instead of a duplicate one.
002 : use for the frame header, primaries, transfert, colorspace like in
proresenc_ks
avoid color shift on some software (update fate test)
003 : change qp start value for each profile based on official encoder
output
and update proxy qp end to a bigger value (also based on official encoder
output)
(update fate test)
004 : calculate dct part before the quantif search. Avoid to recalculate it
each time
On a basic test Prores decoding -> prores encoding, the global speed
improvment is around 2%

This encoder is cover by 4 fate test, can be run with :
make fate-vsynth3-prores;make fate-vsynth2-prores;make
fate-vsynth1-prores;make fate-vsynth_lena-prores SAMPLES=fate-suite/

Plan to add later more part from the ks encoder to this one

Martin
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