Re: [Q] v4l buffer format inside isoc

[Andy Walls <awalls@xxxxxxxxxxxxxxxx>]

On Tue, 2012-03-20 at 21:05 -0300, Ezequiel García wrote:
> Hello,
> 
> I'm a little lost while writing a driver for an easycap device
> (saa7113 capture device).
> I have my isoc handler, and the isoc urb flying OK.
> I also have the videobuf2 queue setup (or at least I think so), and I understand
> I need to call vb2_buffer_done() with a filled buffer.
> 
> What I DON'T understand is how should I fill such buffer?
> I mean, what *format* comes inside the isoc buffer?
> 
> Should I look at saa7113 datasheet?

Section 8.10 of the SAA7113 data sheet shows 16 "data formats".  The
interesting one for video is #15 Y:U:V 4:2:2.

The EM28xx chip programming might rearrange some data, but I have no
knowledge or experience with the eMPIA chips.

Regards,
Andy

> Should I base in em28xx?
> 
> I'm sorry to ask such a generic question.
> Perhaps, someone cares enough to give me a hint.
> 
> Thanks,
> Ezequiel.
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