Messages in this thread | | | Date | Tue, 13 Nov 2007 20:40:42 +0100 | From | Thierry Merle <> | Subject | Re: Problems using quickcam_messenger on ARM (FYI) |
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Hi Mauro, Mauro Carvalho Chehab a écrit : > Em Ter, 2007-11-06 às 18:25 +0100, Markus Hirschmann escreveu: > >> Hello Kernel-Developer, >> >> Module quickcam_messenger seems to be broken (tried 2.6.18 and 2.6.22) >> on 2 different NSLU2 (ARM). Picture is attached. Same kernel and module >> can be used without any problems on x86 here. I don't have any ARM >> device beside the NSLU2, so I cannot check. >> >> The solution was to use Christian Magnusson's quickcam module. >> Everything worked without any problem. Webcam is: >> > > Hmm... you're mentioning the quickcam module, but some of your logs are > related to usbvideo driver. > > On a quick glance, I didn't find anything that could explain your > troubles. It seems to be related to a wrong order at the output format > (for example, the driver is sending RGB, instead of BGR). > > It may also be an issue at the userspace application that is using the > wrong logic to deal with Big Endian. > > The NSLU2 is based on a IXP420 processor that can change its endianess. I suppose Markus has installed the debian-arm distribution on his NSLU2 so it is configured as little-endian. Nevertheless, I took a look at the code of quickcam messenger that is in usbvideo/ This macro: RGB24_PUTPIXEL puts in memory the following bytes: *pf++ = (vb); *pf++ = (vg); *pf++ = (vr); vb, vg, vr are blue, green, red values. Since the driver is still v4l1 this can be normal(?)
Cheers, Thierry - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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