[FFmpeg-devel] [PATCH] libpostproc: remove big-endian AltiVec acceleration

[Sean McGovern]

Hi Andreas,

On Thu, Apr 10, 2025, 03:37 Andreas Rheinhardt <
andreas.rheinhardt at outlook.com> wrote:

> Sean McGovern:
> > Hi,
> >
> > On Wed, Apr 9, 2025 at 2:55 PM Michael Niedermayer
> > <michael at niedermayer.cc> wrote:
> >>
> >> Hi Sean
> >>
> >> On Sun, Apr 06, 2025 at 12:42:30PM -0400, Sean McGovern wrote:
> >>> While POWER & PowerPC systems have technically
> >>> supported little-endian from inception,
> >>> it did not come into proper usage until the
> >>> introducion of the POWER8 in 2013.
> >>>
> >>> The AltiVec acceleration present here has not
> >>> had meaningful change since before then.
> >>>
> >>> refs: Trac/11120
> >>> ---
> >>>  libpostproc/postprocess.c                  |   13 -
> >>>  libpostproc/postprocess.h                  |    1 -
> >>>  libpostproc/postprocess_altivec_template.c | 1211 --------------------
> >>>  libpostproc/postprocess_template.c         |   31 -
> >>>  4 files changed, 1256 deletions(-)
> >>>  delete mode 100644 libpostproc/postprocess_altivec_template.c
> >>
> >> What exactly are you fixing here / what is the problem?
> >> You say the code hasnt been changed and you link to a ticket
> >> where people cant decide if they talk about big or little endian
> >> and that links to seemingly unrelated tickets
> >>
> >> Please clearly explain what the issue is and why this is
> >> the correct fix
> >>
> >
> > We already discovered a few months back that we have no real
> > maintainers for these ppc pieces, so as noted in the ticket I am
> > working on removing them.
>
> unmaintained != broken
>

This statement was neither expressed nor implied from the patch.


> > Is this what you want in the patch notes?
> >
> >> Also you are changing public API without version bump
> >>
> >
> > Oops, yeah OK I can do that.
> > Is a minor bump enough or should this be a major?
>
> This would need a proper deprecation period.
> (You can also deprecate the 3DNOW define at the same time.


OK sure, will update and send later.

)
>
> - Andreas
>
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-- Sean McGovern

>