Date: Mon, 29 Sep 2008 08:51:58 +0200 From: Hans Petter Selasky <hselasky@c2i.net> To: frtzkatz@yahoo.com Cc: freebsd-multimedia@freebsd.org Subject: Re: V4L-2 support in FreeBSD Message-ID: <200809290851.59424.hselasky@c2i.net> In-Reply-To: <182143.1557.qm@web63007.mail.re1.yahoo.com> References: <182143.1557.qm@web63007.mail.re1.yahoo.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On Monday 29 September 2008, Fritz Katz wrote: > --- 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? Hi Fritz, There is an example USB webcam driver in my SVN repository that uses this file. Just search for webcam: find . -name "*webcam*" > > Are there any plans to check it into the > tree for FreeBSD-8? No, not yet. > > 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. The V4L-1 part has been stripped away. It is a pure V4L-2 library. I have compiled with ekiga and was able to use my webcam, although some work remains like moving the decoding of the JPEG frames from a kernel thread to a userland thread. > > 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). Just send me a patch. > > > 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!" :-) > --HPS
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200809290851.59424.hselasky>