[linux-dvb] Re: OSD Patch

[Jeremy Jones <mr.lebowski@gmail.com>]

On Fri, 23 Jul 2004 02:15:34 +0200, Oliver Endriss <o.endriss@gmx.de> wrote:
> On Thursday 22 July 2004 23:51, Jeremy Jones wrote:
> > On Thu, 22 Jul 2004 13:06:15 +0200, Oliver Endriss <o.endriss@gmx.de> wrote:
> > > On Thursday 22 July 2004 07:24, Jeremy Jones wrote:
> > > > ...
> > > > I am really only interested in using the VIDEOHSIZE window to create
> > > > an IRD-like EPG, but if the OSD API were to change I figured why not
> > > > change it to be able to create all the window types.  I have done
> > > > testing of the change and haven't noticed any problems yet.  Would it
> > > > be possible to get these changes added to the CVS repository.
> > >
> > > Hm, there is a small problem with this patch:
> > > The application cannot detect whether the running driver really supports
> > > the new function. I'd rather add a new OSD command OSD_OpenRaw. An old
> > > driver would return EINVAL in this case.
> >
> > Hi Oliver,
> >
> > Thanks for the feedback.  I have created a new patch using the
> > implementation you suggested.
> 
> Looks ok. If nobody complains I will add the patch to CVS.
> I will also move av7110_window_display_type from av7110_hw.h to osd.h.
> (Should not matter, as the OSD stuff is av7110-specific anyway.)
> 
> BTW, what's the difference between true size and normal size display
> type, e.g. VIDEOTHSIZE/VIDEOHSIZE?

I don't know the formal definition of the true size display types but
when I compare them to regular video windows the width of the true
size video is thinner (maybe 15%-20%) while the height seems
unchanged.  (NTSC)
 
> While playing with these functions I found something interesting:
> Euro1080 will not crash the ARM if you open a VIDEOHSIZE or VIDEOQSIZE
> OSD window! You will get a terrible picture but the ARM keeps running.
> 
> I found that the video decoder does not obey the x-size of the window,
> while the y-limit works fine. This could explain why Euro1080 crashes
> the ARM in normal mode. Maybe the decoder writes beyond the right border
> of the screen. Could this be fixed in the firmware?

Thank You,
bball