On Fri, 22 Feb 2002, [big5] Kevin Huang wrote:
> >
> >
> > On Fri, 22 Feb 2002, [big5] Kevin Huang wrote:
> >
> > > --- Mark Vojkovich <[EMAIL PROTECTED]> ���T���G> On Fri, 22 Feb
> > 2002,
> > > [big5] Kevin Huang wrote:
> > > >
> > > > > > > Hi Mark :
> > > > > > >
> > > > > > > Thanks for your answer in advance!! :)
> > > > > > >
> > > > > > > I'm working on Xv driver for my company's graphic chip, but I
> > > > > > > encounter an problem & can't fint out the reason. Everytime I
> > > > > > > use other window to clip the video window or move it,
> > > > > > > StopVideo will be called & makes the video flicker. This
> > > > > > > doesn't happen in ATI AiW r128.
> > > > > >
> > > > > > That's because the other drivers don't stop the video then.
> > > > > > They stop it in a few seconds if PutImage doesn't get called
> > > > > > again.
> > > > > >
> > > > >
> > > > > How does the AiW driver make it ? I trace the code of PutImage &
> > > > > StopVideo in r128_video.c but find nothing special. The StopVideo
> > > > > seems be called by X Server & the AiW driver seems cannot control
> > > > > when StopVideo will be called. the driver only provide the
> > > > > StopVideo function call for X Server.
> > > >
> > > >
> > > > Are you saying that the ATI driver's StopVideo is not called?
> > > > It should be called when the window moves.
> > > >
> > > >
> > > > Mark.
> > > >
> > >
> > > Yes, ATI's StopVideo is not called when the video window moves, so
> > > it's video doesn't flicker during window moving. The StopVideo is only
> >
> > > called at the end of playing mpeg2 video file with cleanup = 1. I
> > > attach part of the XFree86.0.log for reference.
> >
> > I see some confusion going on here.. There are two different StopVideo
> > functions: one inside the driver and one in Xv library. The library
> > function instructs X to call StopVideo function in the driver, but the
> > latter can also be called by Xserver without request. For example, if
> > you open a window and make a single PutImage or PutVideo call and then
> > destroy the window Xserver will call StopVideo in the driver even though
> > you did not make StopVideo call through Xv library.
> >
> > Does this help ?
> >
> > Vladimir Dergachev
> >
>
> Hi Vladimir, thanks for ur response.
>
> Ur explanation is very clear. YES, the StopVideo in Xv library can be called by
> Xserver without AP's request.
> I have a DVD player AP which will use PutImage function in Xv library to
> display the video. When I use our own graphic card & driver, in fact, Xserver
> will call StopVideo in my driver not only when I destroy the window but also
> moving or cliping the window. If I remove the flag VIDEO_OVERLAID_IMAGES in my
> driver, Xserver will never call StopVideo even though I destroy the window.
>
> In ATI's driver, it also set VIDEO_OVERLAID_IMAGES flag. But I move or clip the
> video window, Xserver never call StopVideo in ATI's driver. It is only called
> when the window is destroy.
>
> My purpose is to eliminate the flicker state when moving the video window. Coz
> in StopVideo function, we turn off video H/W engine; in PutImage function, we
> turn on video H/W engine, the same does ATI.
> If Xserver will call StopVideo during moving window, the video will flicker due
> to video H/W off & on.
>
> Why ATI can make it that Xserver doesn't call StopVideo in it's driver when I
> move or clip the video window ?
Did you define "ReputImage" function ? It is used to reposition an already
displayed image.
Vladimir Dergachev
>
> Kevin
>
>
> -----------------------------------------------------------------
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>
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