Re: [FFmpeg-devel] [PATCH v5 1/4] all: Replace if (ARCH_FOO) checks by #if ARCH_FOO, part 2

From: Michael Niedermayer <michael@niedermayer.cc>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: Re: [FFmpeg-devel] [PATCH v5 1/4] all: Replace if (ARCH_FOO) checks by #if ARCH_FOO, part 2
Date: Mon, 31 Jul 2023 20:28:01 +0200
Message-ID: <20230731182801.GC7802@pb2> (raw)
In-Reply-To: <5a6fb61c-38e2-4ba2-84c1-0e9ab0a57b24@amyspark.me>

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On Sat, Jul 29, 2023 at 04:07:15PM -0300, L. E. Segovia wrote:
> Continuation of 40e6575aa3eed64cd32bf28c00ae57edc5acb25a
> 
> Co-authored-by: Nirbheek Chauhan <nirbheek@centricular.com>
> 
> Signed-off-by: L. E. Segovia <amy@amyspark.me>
> ---
>  libavcodec/x86/fdctdsp_init.c        |   2 +
>  libavcodec/x86/flacdsp_init.c        |   8 +-
>  libavcodec/x86/hevcdsp_init.c        | 547 ++++++++++++++-------------
>  libavcodec/x86/idctdsp_init.c        |   9 +-
>  libavcodec/x86/mlpdsp_init.c         |   6 +-
>  libavcodec/x86/vc1dsp_init.c         |   6 +-
>  libavfilter/x86/colorspacedsp_init.c |   4 +-
>  libavfilter/x86/vf_atadenoise_init.c |   6 +-
>  libavfilter/x86/vf_ssim_init.c       |   4 +-
>  libavfilter/x86/vf_w3fdif_init.c     |   4 +-
>  10 files changed, 311 insertions(+), 285 deletions(-)

this produces heavy distortion in files encoded like this:

./ffmpeg -enable_drefs 1 -i mov-ref/dir1/dir2/movie3.mov  -bitexact file4671-3.avi

https://samples.ffmpeg.org/ffmpeg-bugs/trac/ticket4671/

thx

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Complexity theory is the science of finding the exact solution to an
approximation. Benchmarking OTOH is finding an approximation of the exact

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