[FFmpeg-devel] [PATCH] simplify dnxhd threading

[Alexander Strange]

On Sat, Sep 26, 2009 at 1:31 AM, Mike Melanson <mike at multimedia.cx> wrote:
> Reimar D?ffinger wrote:
>>
>> On Fri, Sep 25, 2009 at 10:51:36AM -0700, Baptiste Coudurier wrote:
>>>
>>> 68 contexts, even when not using threads ? I'm concerned about memory.
>>
>> Yes, that probably should be checked. Though I think that giving each
>> thread
>> its own whole context is overdoing it anyway.
>
> Thanks for the patch. I vastly simplified the Theora multithreading
> prototype. Instead of copying the whole VP3 context like I did when modeling
> after the dnxhd encoder, I made a new structure that only contains a single
> int-- the slice number to be processed. Then I submit 68 slices to the
> thread dispatcher for processing.
>
> ...and it still doesn't work quite right.
>
> --
> ? ?-Mike Melanson

I had these patches in an old git branch; they might help, though I
didn't see much speed up.
The Theora decoder spends much more time doing linear searches than it
does actually decoding, IIRC.

And I don't mean to submit patch 4 yet, the "enc->thread_count=" lines
should be deleted from ffplay/ffmpeg too.

(and could you look at
http://article.gmane.org/gmane.comp.video.ffmpeg.devel/95138/?)
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