[FFmpeg-soc] [soc] Add choice of threading algorithm to AVCodecContext.

[Reimar Döffinger]

On Tue, Jun 17, 2008 at 02:04:43PM -0400, Alexander Strange wrote:
> 
> On Jun 17, 2008, at 12:18 PM, Reimar Döffinger wrote:
> 
> > On Mon, Jun 16, 2008 at 07:57:05PM -0400, Alexander Strange wrote:
> >>
> >> Use it to simplify USE_* macros.
> >> FF_THREAD_AUTO needs to be handled better - even if a codec can  
> >> handle frame-threads, we still don't want to use them if there are  
> >> enough slices available.
> >
> > I also do not really like that this design does not allow to use both.
> > E.g. when 16 core CPUs become common just one type may not be good
> > enough ;-)
> > Or to say it differently: I think the problem is not just with
> > FF_THREAD_AUTO but in the design in general.
> 
> You can't run out of threads for multiframes, but eventually I guess  
> it would be better to have x frame threads * x slice threads. Sounds  
> more useful for encoding, though; does anyone really need to decode  
> that fast?

You can easily run out of memory or cache though, especially if you try
some kind of direct rendering where all frames must fit into a
DMA-enable memory range or similar.

Greetings,
Reimar Döffinger