Re: PATCH: gspca-mercurial fix sn9c103 decoding frames

I've forgot to attach the picture.

2008/7/9 Andoni Zubimendi <[email protected]>:

> 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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