Xv (Xvideo) tha API for using the hardware scaler, color space convertion and video overlay on modern chipsets. XvMC - extention to Xv to handle hardware based motion compensation and (I think) IDCT for video overlays. Only 3 drivers that I know of support this (i810, VIA's savage driver, and nvidia's binary driver). Gatos - a project that develops drivers for the video in/out, tv tuner, etc. functionality for ati all-in-wonder cards. Mesa - opensource OpenGL library. forms the basis for the opensource 3D drivers. DRI - direct rendering infrastructure. The group that develops opensource 3D drivers. Most xfree86 video drivers consist of 1 or 3 parts. 1 for 2D only drivers, 3 for 2D+3D drivers. 1. the 2D driver - the 2D server handles 2D operations and Xv 2. the 3D driver - the 3D client driver handles 3D direct rendering 3. the DRM kernel module - arbitrates access to video card for 3D (and in some cases 2D) operations That should give you the basics. Alex --- Bret Hughes <bhughes@xxxxxxxxxxxxx> wrote: > On Mon, 2003-11-03 at 22:57, Alex Deucher wrote: > > Other than 3D Thomas' sis driver is very flexible and full > featured, > > plus some sff boxes based on sis chipsets offer DVI ports (not sure > > about your model). The latest code drop from S3/VIA offers good > > functionality for the savage chip (3D, Xvmc), however it has not > yet > > been ported to mesa 5.x. see the savage-2_0_0 branch in DRI cvs. > I'm > > not sure the savage chips support DVI. As I recall the video > engine in > > the savage chips wasn't the greatest, but that might be overcome by > > using the Xvmc stuff. I'm not too familiar with the sis video > engine > > performance-wise, but I think it is decent, plus there are a lot of > Xv > > related controls that other chipsets don't offer like chromakey and > > good tv out support. > > > > Add on cards may perform better due to havin discrete memory, but > few > > xfree86 drivers support TV out. The few that come to mind are > mostly > > integrated chips (trident, via, savage, sis). > > > > Thanks for the additional info. the shuttle models do have a $40 add > on > card that plug into the agp port that provides dvi and tv out > connections to the onboard video. > > It appears that with the gatos ati.2 driver the radeon 7200 chip has > good tv out support using their ati.2 driver. I installed this > driver > to get xv support in mplayer on an ati expertLCD (Mach64 based) and > it > was dead easy. > > It also appears that the card will fit into the box which is a good > thing ;) > > Is there some document that explains the relationship between mesa > gatos > xfree86 XvImage Xvideo and all the other names that keep cropping up > in > my reading? Every time I start to think I am beginning to see the > light, it is another train. Or even worse I have the feeling I have > read a decent explaination somewhere and can't get back to it after > reading another hundred pages or so of information. > > Thanks again. > > Bret > __________________________________ Do you Yahoo!? Protect your identity with Yahoo! Mail AddressGuard http://antispam.yahoo.com/whatsnewfree _______________________________________________ xfree86-list mailing list xfree86-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/xfree86-list IRC: #xfree86 on irc.redhat.com
