On Wed, 3 Oct 2001, Peter Surda wrote:
> On Wed, Oct 03, 2001 at 01:17:03AM +0000, David Johnson wrote:
> > Actually I think SiS offers an idct solution as well but beyond protecting
> > intellectual property there are potential legal issues with exposing how ATI
> > decodes copy righted, copy protected DVD.
> I don't understand what this fuss about hardware accelerated idct is. In which
> situation you actually get use of it? When I play DVDs on my Duron 650 I get
> over 50% free CPU time with a software-only dvd decoder (vlc), the card only
> does yuv->rgb and scaling. It really only helps on older computers, but why
> would anyone buy a radeon 8500 and put it in an old computer?
Well, it would be useful on a notebook pc's (cpu is much less power
efficient). I am not familiar with particular implementations, but from
mathematical point of view, one should be able to use it to compress video
and for this you'll need all the speedups you can get.
Vladimir Dergachev
>
> > It may or may not be an issue but I understand why they don't want to
> > necessarily play those games. There are similar issues with releasing TV
> > Out information.
> Yes, there are problems about macrovision, i.e. the manufacturer shouldn't
> give out the docs if they can't ensure control of macrovision. Fortunately
> there has been some progress lately in the area of undocumented TV-Out
> features, thanks to me <g>.
>
> Hmm isn't this dri-devel? Shouldn't we be talking about stuff like how to do
> DMA efficiently and what new functions to add instead? Brings me back to what
> I wrote a couple of weeks ago, there is no function in DRI that is able to
> transfer data from the card to system memory and such a beast could really
> come in handy when doing video capturing.
>
> > David
> Bye,
>
> Peter Surda (Shurdeek) <[EMAIL PROTECTED]>, ICQ 10236103, +436505122023
>
> --
> To boldly go where I surely don't belong.
>
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