[Mplayer-dvb] This might be a it off topic but ..

[Knuts Andy]

hi

i see,
well, if you were gonna write some small patches for that double
memcpy() i will certainly test it (so please send a copy to me too
if you plan to write it).. but it's already late over here so
i'm goin to bed now .. 

Have a good nite !

Cya,
Akke

On Sun, 23 Sep 2001, Arpi wrote:

> Hi,
> 
> > Already 11% that's pretty much already :) hehehe
> > can you send me the files(or patches) you changed to make it go 11% faster
> > or tell me where the memcpy's are so i could try eliminating them too ..
> > want to try and see if that makes the movie play someone a bit smootly
> 
> i don't have patches yet... just measuring cpu usage of things...
> 
> now i've finished:
> 
> 16%  divx decoding
> 
> 11%  2 x memcpy
>  3%  mpeg headers, getpixel
>  9%  dct
>  1%  quant preparation
> 17%  quantization (should be rewritten in MMX)
> 11%  huffman coding
> 16%  ioctl (sending to DVB card)
> 
> it will be hard to pull down drastically.
> memcpy - can be eliminated by API changes (direct rendering)
> dct - already optimized
> quantization - can be mmx optimized, easy work
> huffman coding - optimize tables, won't help too much
> ioctl - can't change, it depends on card/bus speed (maybe lower if
>    we increase quant scale, but it will result worse quality)
> 
> ideally we can eliminate about 25-30 %
> 
> 
> A'rpi / Astral & ESP-team
> 
> --
> mailto:arpi at thot.banki.hu
> http://esp-team.scene.hu
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