[compiz] video plugin?

[dragoran]

thx I missed this mail...
Andres Blanco wrote:
> David wrote:
>
> On 3/5/07, David Reveman <davidr at novell.com> wrote:I've added a simple
> plugin to compiz that provides a way to render video
> efficiently on a composited desktop.
>
> A video playback client basically copies video data to a pixmap and sets
> an X property on a client window that describes the image format of the
> data and where it should be rendered.
>
> The compiz video plugin will scale and perform necessary colorspace
> conversions when compositing the desktop.
>
> It provides very efficient playback of video on a composited desktop and
> it requires much less resources than e.g. XVideo as no intermediate
> buffer is required and hence also no accelerated offscreen rendering.
>
> RGB and YV12 image formats are currently supported but it's of course
> very easy to add support for additional formats.
>
> YV12 format requires GL_ARB_fragment_program and 8 bpp alpha only GLX
> pixmap support. The server doesn't provide alpha only pixmaps today. The
> attached patch adds an alternative PICT_a8 visual to composite and that
> is enough for xgl to support alpha only GLX pixmaps (not sure it will
> work with aiglx or nvidia's driver, I would guess not).
>
> Adding an alpha only X visual might be a bad idea. It doesn't cause any
> issues with the clients I've been running but I've seen that GDK thinks
> the server is broken and spits out some warnings when it finds a visual
> with masks set to 0. Might be a better idea to just add the fbconfig and
> no visual but the current GLX code in the server relies on every
> fbconfig having a matching X visual so it will need a bit more work and
> I'd like some feedback before I start doing anything like that.
>
> I've created a patch to mplayer's xv output code that makes it use
> compiz video interface when available. Works pretty well and it even
> dynamically detects when the compiz video interface isn't available
> anymore and then switches to xv instead. Similar patches can easily be
> created for other video playback clients, of course.
>
> - David
>
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>
> On 3/7/07, dragoran <drago01 at gmail.com> wrote:
>>
>> Hello,
>> I updated to current git and find the video plugin.
>> What exactly is it supposed to do?
>> I want to test it but I don't know exactly what to test....
>> Enabling it did not make any difference (it loaded successfully).
>>
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>
>
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