On Thu, Apr 9, 2009 at 17:18, Alex Deucher <alexdeuc...@gmail.com> wrote: > On 4/9/09, Stephane Marchesin <marche...@icps.u-strasbg.fr> wrote: >> On Thu, Apr 9, 2009 at 08:49, Zou, Nanhai <nanhai....@intel.com> wrote: >> > >> > >> > I have not been looking into gallium support yet. >> > Are you working on software fallback or on some real hardware? >> >> >> We have xvmc on top of g3dvl working on nv40-class hardware (and more >> generically, it should work any card which has a gallium driver). >> We've had this since last year's summer of code. Our main purpose is >> to avoid reinventing the wheel with each driver... >> >> >> > >> > I am now working on HW accelerated media support for our chip(XVMC etc), >> next plan is to support VAAPI. >> > The code is now in our 2D dirver, in freedesktop.org xf86-video-driver . >> The master branch has MC only implement, >> > There is a branch xvmc-vld which support offload mpeg2 decode to GPU from >> VLD entry. >> > Media kernels running on GPU will do MC and IDCT and IQ, fix function >> unit HW will do VLD decode. >> > >> >> >> Well, we don't have hw video decoding specs for nvidia/ati (and on >> some hardware we don't even have any video decoding hw), so we use the >> shaders for everything anyway. > > FWIW, MC is done using the 3D engine on our hardware, so MC should be > able to be implemented now for those that are interested. r3xx+ use > shaders. r1xx/r2xx have a couple special bits to flip in the 3D > engine. idct is handled by a separate block what we hope to > eventually release either code or docs for. >
For r100/r200 a specific implementation is going to be your only option, but let's be honest, those cards can't do H.264. And these days you can to H.262/263 just fine on the CPU anyway... That's my point: video codecs move too fast to be put into silicon, and require too many resources to implement. So we should use shaders and lay everything onto an API that takes care of the hardware details. Stephane ------------------------------------------------------------------------------ This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com _______________________________________________ Mesa3d-dev mailing list Mesa3d-dev@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mesa3d-dev
