[FFmpeg-devel] [PATCH 3/4] Implement and use shareable ff_transpose function.

[Stefano Sabatini]

On date Thursday 2010-11-04 00:54:58 +0100, Michael Niedermayer encoded:
> On Wed, Nov 03, 2010 at 10:43:56PM +0100, Stefano Sabatini wrote:
> > On date Thursday 2010-10-28 16:38:35 -0700, Stefano Sabatini encoded:
> > > On date Thursday 2010-10-21 01:37:38 +0200, Michael Niedermayer encoded:
> > > > On Mon, Oct 18, 2010 at 02:09:54PM +0200, Stefano Sabatini wrote:
> > > [...]
> > > > > So what's the best course of action to follow now?
> > > > > 
> > > > > We have three filters (one of which committed: hflip, tranpose,
> > > > > rotate90) which may share common code during the init stage. Currently
> > > > > they are in separate files, so which is the best way to make them
> > > > > share the optimization code?
> > > > 
> > > > I dont know but id say hflip and transpose can be optimized and rotate90 should
> > > > use them somehow
> > > 
> > > Provided that right now I don't care about the optims but I want to
> > > commit the rotate90 filter, I'd stick with my proposed solution as you
> > > didn't suggest a better one, optims gurus can take what's required
> > > later if they'll proceed with optimizations.
> > 
> > Ping? OK to apply this and leave it to asm-savvy people? 
> 
> id say if you dont care about factorizing the code in a way thats easy to use
> for optims then leave it duplicated

I'm still waiting for a useful description of how to do that.

Anyway if someone wants to optimize he can also apply the required
changes himself, some few patches more never killed anyone and this is
stalling the rotate90 filter for too much time.

I'll apply this variant of the patch in few days.
-- 
FFmpeg = Fundamental and Fostering Mysterious Ponderous Eccentric Guru