Date: Thu, 8 Mar 2012 12:21:45 +0100 From: Matthias Apitz <guru@unixarea.de> To: Hans Petter Selasky <hselasky@c2i.net> Cc: freebsd-multimedia@freebsd.org Subject: Re: webcamd/cuse4bsd && Skype Message-ID: <20120308112144.GA1540@tiny> In-Reply-To: <201203080744.55805.hselasky@c2i.net> References: <20120101164408.GA2389@tinyCurrent> <20120106160400.GA87768@tinyCurrent> <20120306115747.GA1796@tiny> <201203080744.55805.hselasky@c2i.net>
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El día Thursday, March 08, 2012 a las 07:44:55AM +0100, Hans Petter Selasky escribió:
> > Hello Hans,
> >
> > Can we please return to this thread?
> >
> > The problem was/is that the Linux binary skype-2.0.0.72,1 is sending
> > V4L1 ioctl's, the cam only understands V4l2 ioctl's and webcamd(8) does
> > not translate them to V4l2; you wanted to check why?
>
> Hi,
>
> Webcamd compiles the Linux code which translates V4L1 IOCTL into V4L2 IOCTL's
> maybe the IOCTL's are not numerically right?
>
> media_tree/drivers/media/video/v4l2-compat-ioctl32.c
>
> Add some breakpoints in that file and run webcamd from GDB.
Hi,
I haven't used GDB, but only a look into tha above source; it says
"conversion between 32bit and 64bit native ioctls" and in the defines I
only see for example _IOWR('V', 4,...) i.e. with capital 'V' while v4l1
is 'v' small v (0x76..);
I don't see how this could translate v4l1 into v4l2 ioctls; am I
missing some point here?
Thanks
matthias
--
Matthias Apitz
e <guru@unixarea.de> - w http://www.unixarea.de/
UNIX since V7 on PDP-11, UNIX on mainframe since ESER 1055 (IBM /370)
UNIX on x86 since SVR4.2 UnixWare 2.1.2, FreeBSD since 2.2.5
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