Em 17-08-2011 05:37, Ivan T. Ivanov escreveu: > > Hi everybody, > > On Wed, 2011-08-17 at 05:25 -0700, Mauro Carvalho Chehab wrote: >> Em 17-08-2011 00:57, Laurent Pinchart escreveu: >>> Hi Mauro, >>> >>> On Wednesday 17 August 2011 00:36:44 Mauro Carvalho Chehab wrote: >>>> Em 16-08-2011 08:44, Laurent Pinchart escreveu: >>>>> On Tuesday 16 August 2011 17:30:47 Mauro Carvalho Chehab wrote: >>>>>> Em 16-08-2011 01:57, Laurent Pinchart escreveu: >>>>> No. S_INPUT shouldn't be use to select between sensors. The hardware >>>>> pipeline is more complex than just that. We can't make it all fit in the >>>>> S_INPUT API. >>>>> >>>>> For instance, when switching between a b&w and a color sensor you will >>>>> need to reconfigure the whole pipeline to select the right gamma table, >>>>> white balance parameters, color conversion matrix, ... That's not >>>>> something we want to hardcode in the kernel. This needs to be done from >>>>> userspace. >>>> >>>> This is something that, if it is not written somehwere, no userspace >>>> applications not developed by the hardware vendor will ever work. >>>> >>>> I don't see any code for that any at the kernel or at libv4l. Am I missing >>>> something? >>> >>> Code for that needs to be written in libv4l. It's not there yet as I don't >>> think we have any hardware for this particular example at the moment :-) >>> >> As no pure V4L2 application would set the pipelines as you've said, and >> no libv4l code exists yet, > > > Actually there is such code for OMAP3 ISP driver. Plug-in support in > libv4l have been extended a little bit [1] and plugin-in which handle > request for "regular" video device nodes /dev/video0 and /dev/video1 > and translate them to MC and sub-device API have been posted here [2], > but is still not merged. > > Regards, > iivanov > > [1] http://www.spinics.net/lists/linux-media/msg35570.html > [2] http://www.spinics.net/lists/linux-media/msg32539.html
Ah, ok. So, it is just the usual delay of having some features merged. Hans G., FYI. Please review the OMAP3 MC-aware patches for libv4l when you have some time for that. Thanks! Mauro -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
