Thanks a lot!!!
I'll be looking forward for your modifications.
Cheers,
Flavio.
On Wed, 13 Jun 2001, Nemosoft Unv. wrote:
> Hi,
>
> On 13-Jun-01 Flavio Villanustre wrote:
> > You're right. It was my fault. However, I saw that format empirically (aka
> > reverse engineering) from the results of YOUR driver :-) when an
> > application requests a hardware unsupported format (like a 730/740 philips
> > webcam under a kernel 2.4.5 requested to deliver CIF or QCIF, while it, in
> > fact delivers a mixed up SIF or QSIF format).
>
> Hmm, looks like I need to do some more damage control here... The 730/740
> only has 160x120, 320x240 or 640x480 sizes. No CIF/QCIF (I already pointed
> out to them that this wasn�t such a great idea).
>
> It used to be in my driver that it could deliver ANY size, just by padding
> with black (RGB) or gray (YUV) borders. However this was done in the
> conversion routines and you know what happened to that :( So right now the
> driver is not checking for image sizes (it didn�t have to).
>
> > I wrote down some quick and dirty conversion routines for openh323 stack
> > and I may tell you that the format is really ugly:
> >
> > If the application requests QCIF, the driver, rather than failing, it says
> > it can deliver that format, but it instead delivers a padded/trimmed
> > format like this:
> >
> > uuyyyyuuyyyy
> > vvyyyyvvyyyy
>
> This is simply not true, unless you�re an Arab or Hebrew native :) It
> delivers yyyy uu yyyy uu etc. But it could be that you�re falling somewhere
> in the middle
>
> > If the application requests CIF, the driver delivers:
> >
> > yyuuyyyyuuyyyy
> > yyvvyyyyvvyyyy
>
> *blink* I think something is being truncated here.
>
> > If you want I may send you the application (pwlib/openh323/ohphone), my
> > conversion routines and my philips ToUcam Fun camera (just kidding about
> > the latter :-)
>
> Thank you, but I don�t have any ports left on my USB hub (already got 5
> webcams:-)) Maybe I�ll hack something up this weekend that will at least
> have the driver complain about invalid formats etc.
>
> - Nemosoft
>
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>
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