On Wed, Sep 21, 2022 at 05:12:52AM +0000, Lynne wrote: > ffmpeg | branch: master | Lynne <d...@lynne.ee> | Mon Sep 19 23:48:53 2022 > +0200| [3ade6a8644ab519fcd7caa7ef457dd406162bc14] | committer: Lynne > > x86/lpc: implement a new Welch windowing function > > Old one was written with the assumption only even inputs would be given. > This very messy replacement supports even and odd inputs, and supports > AVX2 for extra speed. The buffers given are usually quite big (4k samples), > so the speedup is worth it. > The new SSE version is still faster than the old inline asm version by 33%. > > Also checkasm is provided to make sure this monstrosity works. > > This fixes some FATE tests. > > > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=3ade6a8644ab519fcd7caa7ef457dd406162bc14 > ---
This seems to "break" one flac case ./ffmpeg -i asynth-44100-2-2.wav -bitexact -frame_size 4095 -max_prediction_order 16 test-old.flac The file size becomes worse by alot: -rw-r----- 1 michael michael 379149 Okt 4 16:45 test-new.flac -rw-r----- 1 michael michael 235482 Okt 4 16:46 test-old.flac [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB While the State exists there can be no freedom; when there is freedom there will be no State. -- Vladimir Lenin
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