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Date:      Sat, 30 May 2009 21:39:28 -0700
From:      Julian Elischer <julian@elischer.org>
To:        Luigi Rizzo <rizzo@iet.unipi.it>
Cc:        freebsd-multimedia@freebsd.org, freebsd-emulation@freebsd.org, Hans Petter Selasky <hselasky@freebsd.org>
Subject:   Re: Skype-2.0 is here!
Message-ID:  <4A220A00.4040007@elischer.org>
In-Reply-To: <20090530090540.GC46541@onelab2.iet.unipi.it>
References:  <200804142217.17035.beech@FreeBSD.org>	<20090530070025.GA2465@current.Sisis.de>	<200905300955.34102.hselasky@freebsd.org> <20090530090540.GC46541@onelab2.iet.unipi.it>

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Luigi Rizzo wrote:
> On Sat, May 30, 2009 at 09:55:32AM +0200, Hans Petter Selasky wrote:
>> On Saturday 30 May 2009, Matthias Apitz wrote:
>>> El d?a Monday, April 14, 2008 a las 10:17:12PM -0800, Beech Rintoul 
>> escribi?:
>>>> Finally, skype-devel has been updated to the new 2.0.0.68 version.
>>>> This is the one that includes video and any input to get this (video)
>>>> going is appreciated. Everything else seems to work as advertised.
>>>>
>>>> If you're going to update to this version, please read
>>>> UPDATING-20080318.
>>>>
>>>> Enjoy,
>>>>
>>>> Beech
>>> Hello Beech,
>>>
>>> I'm running on my laptop 8-CURRENT (of May 28), have the pwc.ko loaded
>>> which gives me a device /dev/video0 and pwcview is showing my face; as
>>> well I have installed skype-2.0.0.72,1 from the ports which works fine
>>> but does not recognice the video device; what should I do or test to
>>> bring this together? Thanks
>>>
>>> 	matthias
>> Hi all,
>>
>> We need some common effort to get Video4Linux USB devices working on FreeBSD. 
>> First of all we need to push a video4linux library.
>>
>> -lvideodevx
>>
>> Methods:
>>
>> int videodevx_open(int unit); /* returns a handle, not neccesarily a 
>> file-handle */
>> int videodevx_read(int hdl, ptr, len);
>> int videodevx_write(int hdl, ptr, len);
>> int videodevx_ioctl(int hdl, cmd, arg);
>> int videodevx_mmap(int hdl, void *addr, size_t len, int prot, int flags, int 
>> fd, off_t offset);
>> int videodevx_getfd(int hdl); /* used for polling */
>> int videodevx_close(int hdl);
>>
>> Some work in progress is available from:
>>
>> svn --username anonsvn --password anonsvn \
>>       checkout svn://svn.turbocat.net/i4b/trunk/usbcam
>>
>> Download "linux-2.6.29" to "ulinux/linux"
>>
>> cd ulinux
>>
>> make clean all
>>
>> NOTE: It's not linking yet.
>>
>> Second, we need a userland port for Video4Linux, which I am working on. So 
>> that the application directly receives the USB data and talks to the webcam 
>> through -lvideodevx and the new BSD licensed -lusb .
>>
>> Third we need to convince everyone to use videodevx when opening video 
>> devices. On linux videodevx will simply be a wrapper for 
>> open/close/ioctl/... . On FreeBSD videodevx will be a complete USB webcam 
>> driver library.
>>
>> Anyone that wants to join heads?
> 
> Excellent summary which covers the situation for native apps.
> 
> I wonder if the case is a bit different for skype and linux binaries
> in general, as they run under linux emulation so perhaps the
> it is the linuxulator that has to emulate the v4l(2?) calls,
> and i have no idea if this needs to be done in the kernel or we
> can deal with this in some libc wrapper ?

there was a v4L2 implementation for FreeBSD that worked
I checked some of it into P4 (v4l2 branch I think...)
we actually have permsission to use the V4L2 and V4L include files 
directly (I have email from the authors) as they are not copyright at 
all but just reflect the ABI/API.


> 
> cheers
> luigi
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