Re: PATCH: gspca-mercurial fix sn9c103 decoding frames

Hi Hans!

Thanks for answering and excuse me for taking so much time to write. I've
been very busy this week and had problems with the internet provider.

1) You're getting hit by the unknown codes in the compressed data stream
>    problem, see:
>    http://bertrik.sikken.nl/webcam/sn9c101.htm


Interesting I'll take a look.

2) You're exposure is way of, I have the same problem with an sn9c102 cam
> with
>    a tas5110c sensor, try using it in a darker room :)


I think that the generic initialization sets a very high exposure. And the
image looks like this.


> 3) the bayer pattern of your cam is different, no GBRG, like mine, but
> perhaps
>    BGGR ?
>
    ....

> And then change the line:
>           bayer_fmt = V4L2_PIX_FMT_SGBRG8;
>
> To:
>           bayer_fmt = V4L2_PIX_FMT_SBGGR8;


I've tried this and the image was almost the same, I think the problem is
the initialization of the sensor.

I'm playing with different dumps I've made from windows and now I've got a
clearer picture, I think It needs a little tweaking now. I also need to
clear the code, because I've made patches here and there until it worked.
I'm sending a picture of the results.


> Also interesting with regards to this is to try the sn9c102 driver which
> already is part of the kernel together with libv4lconvert? That doesn't
> have
> the headersize problem AFAIK, and also that can give raw bayer in low res
> modes, avoiding the unknown compression codes problem.


I have plans to do this in the next days, I'll tell you the results.

BTW how are you using libv4lconvert? And have you applied the camorama
> nugfix
> patches which come together with libv4l to camorama.


I'm using libv4lconvert as documented in the README, and it's working. I
know because if I don't use the LD_PRELOAD environment variable, the image
that appears in camorama (or skype...) is just garbage. The camorama version
I'm using is an unpatched one.

Regards,

Andoni

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