<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta http-equiv="Content-Type" content="text/html;charset=ISO-8859-1"> <title></title> </head> <body text="#000000" bgcolor="#ffffff"> Hi, list! Anybody opposed to this going in it's current form? If not, it will be enabled for linux and gcc, where I know the -nostartfiles option will work. /Thomas Thomas Hellström wrote: <blockquote type="cite" cite="mid41423646.8000701@shipmail.org">Hi! I've attached a patch for a proposal of a libXvMC wrapper. The purpose of the wrapper is to allow XvMC clients to link to different hardware-specific dynamic XvMC libraries runtime. Contrary to the situation with libGL.so and the dri 3D drivers there is no builtin mechanism for this. Current available XvMC libs include libI810XvMC.so (in the Xorg tree) libXvMCNVIDIA.so (Closed-source from Nvidia site) libviaXvMC.so (With a nonstandard VLD extension available from the unichrome project) and the savage XvMC code, which I haven't looked closer at. Up to now the option has been to link to either of these (Xine, for example, links to the Nvidia driver) and this will mean the lib has to be present at runtime and the code will only work with Nvidia hardware. The proposed solution eliminates this problem by providing a libXvMCW.so, which, at runtime, dlopens the library listed in the file <configdir>XvMCConfig and resolves the necessary symbols, including , if present, the nonstandard VLD extension. This will make it possible for codes implementing this extension to also runtime link to libraries not including it. Packagers wanting to include XvMC support for a media player can easily do so for all hardware that supports it, without having to include the HW specific libraries. I've tested it with with linux, xine and the via (xine-xxmc) and Nvidia (xine-xvmc) drivers and it works as expected. It also loads and fires up the I810 driver but unfortunately I have no hardware to test it against. Caveats could be portability: linking the lib requires the -nostartfiles gcc flag. I'm also not sure which implementations of dlopen supports library wrapping in this way. Comments / Opinions would be appreciated. The diff is against current Xorg CVS, and also includes the VLD extension header. Thomas Hellström The Unichrome project <pre wrap=""> <hr width="90%" size="4"> _______________________________________________ xorg mailing list <a class="moz-txt-link-abbreviated" href="mailto:xorg@freedesktop.org">xorg@freedesktop.org</a> <a class="moz-txt-link-freetext" href="http://freedesktop.org/mailman/listinfo/xorg">http://freedesktop.org/mailman/listinfo/xorg</a> </pre> </blockquote> </body> </html>