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 > > ----------------------------------------------------------------------------- > Try SorceryNet! One of the best IRC-networks around! irc.sorcery.net:9000 > URL: never IRC: nemosoft IscaBBS (bbs.isca.uiowa.edu): Nemosoft > >> Never mind the daylight << > > > > _______________________________________________ > Video4linux-list mailing list > Video4linux-list@xxxxxxxxxx > https://listman.redhat.com/mailman/listinfo/video4linux-list >
