[linux-dvb] Re: maximum overlay-size of dvb?

[Joachim 'roh' Steiger <roh@convergence.de>]

On Sun, 4 Feb 2001, Guido Fiala wrote:

> It seems the Windows software coming with the Siemens card can do more than 
> 800x600 pixel for the overlay (e.g.1024x768) - is this a trick or really done 
> in hardware?
the scaling would be done with the pci-businterface saa7146
this chip can only scale down what means you get 768x576 maximum
a solution for you will be using the hardware-scaler on your grafics-board
the saa7146 will then transfer the frames via busmaster into
offscreen-graficcardram and the graficboard has to scale it while blitting
it to the visible memory

under linux you have no support for this mode in the dvb-driver because
its a job for your grafic-driver

regards

roh

-- 
Joachim "roh" Steiger                      roh@convergence.de
Convergence Integrated Media GmbH          http://www.convergence.de
Rosenthaler Str. 51                        fon: +49(0)30-72 62 06 77
D-10178 Berlin                             fax: +49(0)30-72 62 06 55



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