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Date: Sun, 28 Sep 2008 15:59:29 -0700 (PDT)
From: Fritz Katz <frtzkatz@yahoo.com>
To: freebsd-multimedia@freebsd.org, Hans Petter Selasky <hselasky@c2i.net>
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Subject: V4L-2 support in FreeBSD
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--- On Tue, 9/23/08, Hans Petter Selasky <hselasky(at)c2i(dot)net> wrote:
> 
> Hi,
> 
> Maybe you will find the following file useful:
> http://perforce.freebsd.org/fileLogView.cgi?FSPC=//depot/projects/usb/src/sys/sys/videodev.h
> 

  Thanks!, Yes, very useful.

  Can you point me at any drivers or user applications 
  that include and use this file?

  Are there any plans to check it into the 
  tree for FreeBSD-8?

  Some nits: 

   1) V4L2 has divided the info contained in this file 
      into two: videodev.h which contains the obsolete V4L1
      definitions & videodev2.h
      when I attempt to link a V4L2 application using it,
      I get compiler errors and am forced to edit the source 
      files to get them to compile.
      Without V4L-1 structs and ioctl definitions, many 
      older applications won't compile.

   2) The "#define V4L2_STD_PAL_NC" is "#define V4L2_STD_PAL_Nc"
      in V4L2. (Just because Penguins do something silly like
      putting a lower case letter in a define doesn't mean we
      should do it too -- but it *IS* their standard).

>
> Regarding porting, there is not much you need to do. Simply
> make sure that you handle the IOCTLs directly in the video driver.
> 
> --HPS
> 

  Yes, "piece of cake!" :-)

Cheers,
-- Fritz Katz.