Re: Xv MOX extensions multiple client overlays
Nearly all PC hardware has a single video (YUV) overlay engine. Which means it not possible to display more that one overlay video rectangle at a time. Most hardware also has non-overlay mechanisms for scaling and displaying YUV data, and many drivers expose these as Xv adaptors. For example, the driver I'm using exposes 1 overlay adaptor and 32 blit adaptors on my NVIDIA card. If the apps are smart enough to look for free adaptors, the first instance will use the overlay adaptor and subsequent ones will use the blit adaptors. Thanx very much for this info! I did not know that. This gives me a great opportunity to pester app developers to improve Xv usage. Is the number of blit adaptos hardware limited or is it determined by the xfree86 module? Furthermore is my understanding correct: a single window app will be able to use the hardware accelerated YUV video scaling engine. Others will have to use software (or is it hardware but non-overlay mechanism?) scaling/transfromation of YUV data that still can be visualized using Xv? What is the performance hit of using video overlay to non-overlay mechanism? And if someone wonders how my questions started: Sun Microsystems recently announced sth called Looking Glass (http://www.sun.com/bigadmin/xtreme/shows/lg_media.html) (WARNING - Quick Time movie!) I was wondering whether they were using video overlays for the movie apps and whether it would be possible to use many apps per a single overlay hardware. Best regards: al_shopov ___ Devel mailing list [EMAIL PROTECTED] http://XFree86.Org/mailman/listinfo/devel
Re: Xv MOX extensions multiple client overlays
Your link isn't related. "Overlay" in the traditional X-Window sense of the word means that windows go into different layers and do not clip each other. This is a workstation feature and is popular with the CAD and DCC folks. XFree86 supports this type of non-destructive overlays on the hardware that supports it (very few). This has nothing to do with video. Nearly all PC hardware has a single video (YUV) overlay engine. Which means it not possible to display more that one overlay video rectangle at a time. Most hardware also has non-overlay mechanisms for scaling and displaying YUV data, and many drivers expose these as Xv adaptors. For example, the driver I'm using exposes 1 overlay adaptor and 32 blit adaptors on my NVIDIA card. If the apps are smart enough to look for free adaptors, the first instance will use the overlay adaptor and subsequent ones will use the blit adaptors. Mark. On Sat, 17 Jan 2004, Alexander Shopov wrote: > Hi guys, > I am interested whether it is possible for multiple clients to use a > single overlay (possibly via the Xv extension)? I am not talking about > multi head video cards that have several overlays - one for each monitor > but instead normal cards. If one application uses Xv, does it occupy it > exclusively? > I am also interested whether this extension - MOX > http://www.techsource.com/mox.htm#x11extension has been integrated or > deprecated in Xfree86? > Best regards: > al_shopov > ___ > Devel mailing list > [EMAIL PROTECTED] > http://XFree86.Org/mailman/listinfo/devel > ___ Devel mailing list [EMAIL PROTECTED] http://XFree86.Org/mailman/listinfo/devel
Re: Xv MOX extensions multiple client overlays
What about using a single overlay with multiple clients? (3 mplayers for example) Best regards: al_shopov ___ Devel mailing list [EMAIL PROTECTED] http://XFree86.Org/mailman/listinfo/devel
Re: Xv MOX extensions multiple client overlays
On Sat, 17 Jan 2004, Alexander Shopov wrote: >I am also interested whether this extension - MOX >http://www.techsource.com/mox.htm#x11extension has been integrated or >deprecated in Xfree86? It appears that the MOX extension, is a proprietary X11 extension which only exists in that company's X server (Tech Source), at least that's what I see when I read that webpage. It has not ever been part of the official X11 standard, nor part of the X.org sample implementation nor XFree86 implementation at least to my knowledge, and as far as I can see from that webpage at least, it is not open source and never was. It has not been deprecated from XFree86, because it would have had to at one point been included in XFree86 in order to deprecate it, and it wasn't, so that's not possible. ;o) Keith Packard has been working on various X extensions lately on freedesktop.org, including the XFIXES extension, DAMAGE extension, and COMPOSITE extension, bits of which provide similar functionality in the freedesktop.org kdrive xserver to what MOX appears to do. This functionality is not available (yet at least) in XFree86 core X server, however it's theoretically possible that someone could port Keith's extensions to the XFree86 DDX in the future, once they're considered feature complete and ready. You may wish to investigate the freedesktop.org experimental X server, to see how the current development compares to MOX. It might be interesting to discuss any suggestions for improvement, etc. on the xserver mailing list on fd.o also, as things are in development and not locked in stone currently, and feedback is always appreciated by developers. Hope this helps. -- Mike A. Harris ___ Devel mailing list [EMAIL PROTECTED] http://XFree86.Org/mailman/listinfo/devel
Xv MOX extensions multiple client overlays
Hi guys, I am interested whether it is possible for multiple clients to use a single overlay (possibly via the Xv extension)? I am not talking about multi head video cards that have several overlays - one for each monitor but instead normal cards. If one application uses Xv, does it occupy it exclusively? I am also interested whether this extension - MOX http://www.techsource.com/mox.htm#x11extension has been integrated or deprecated in Xfree86? Best regards: al_shopov ___ Devel mailing list [EMAIL PROTECTED] http://XFree86.Org/mailman/listinfo/devel
