Date: Sun, 10 Jan 2010 17:40:17 +0000 From: Brandon Gooch <jamesbrandongooch@gmail.com> To: Hans Petter Selasky <hselasky@c2i.net> Cc: freebsd-multimedia@freebsd.org, freebsd-current@freebsd.org, freebsd-usb@freebsd.org Subject: Re: [FreeBSD 8/9] USB webcamd and video4bsd: Call for testing Message-ID: <179b97fb1001100940o74d5f42arcba36098dd0bdd34@mail.gmail.com> In-Reply-To: <201001101437.37269.hselasky@c2i.net> References: <201001101437.37269.hselasky@c2i.net>
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On Sun, Jan 10, 2010 at 1:37 PM, Hans Petter Selasky <hselasky@c2i.net> wro= te: > Hi, > > During the last couple of days I've spent some time to finish my webcam > daemon. My webcam daemon is basically an application which consists of > userspace Video4Linux USB webcam drivers and some uLinux glue code which = links > with libc, pthreads and libusb. The webcamd talks to /dev/video_daemonX w= hich > is provided by the video4bsd kernel module. There is full support for > mmap/read/write/open/close. poll is not supported. > > Basic operation and idea: > > /dev/video_daemonX is the interface for the webcamd. /dev/videoX is the > interface for the V4L application. The video4bsd transports all data betw= een > these two devices. In the case the V4L application is using mmap, no data= is > copied due to shared kernel memory buffer! > > Licensing issues: > > Effectivly the webcamd userland program becomes GPL'ed due to the V4L USB > drivers which are GPL licensed. Some files inside the webcamd remains BSD > licensed which allows for building similar BSD licensed daemons. > > The rest of the code is BSD licensed. > > Source code: > > 1) FreeBSD 8-stable > > 2) Apply the patch below and re-install libusb in /usr/src/lib/libusb: > > http://p4web.freebsd.org/chv.cgi?CH=3D172876 > > http://perforce.freebsd.org/chv.cgi?CH=3D172876 > > 3) Compile ulinux (webcamd + libv4l + pwcview) and video4bsd (must be che= cked > out in the same folder due to dependencies) > > svn --username anonsvn --password anonsvn \ > =A0 =A0 =A0checkout svn://svn.turbocat.net/i4b/trunk/usbcam/video4bsd > > make all install > kldload video4bsd > > svn --username anonsvn --password anonsvn \ > =A0 =A0 =A0checkout svn://svn.turbocat.net/i4b/trunk/usbcam/ulinux > > make fetch > make patch > make all > make install > > # this will attach to the first detected webcam: > ./webcamd > > # this will try to attach to the given USB unit, interface and V4B unit. > ./webcamd -d ugen4.1 -i 0 -v 0 > > # this will display webcam contents from /dev/video0 by default. > ./pwcview/pwcview > > Feedback and bug reports are welcome. > > Yes, I am working on getting this into ports! > > Known issues: > > 1) If you detach the USB webcam you need to manually restart the webcamd. > > --HPS > > Support: I will be available at #bsdusb on efnet during the day. Seems to work for just a second or two (I see my ugly mug on-screen), and then this: # ./pwcview/pwcview Webcam set to: 320x240 (sif) at 5 fps libv4lconvert: Error decompressing JPEG: fill_nbits error: need 8 more bits libv4l2: error converting / decoding frame data: v4l-convert: error parsing JPEG header: Not a JPG file ? >From another xterm: # ./webcamd -d ugen6.2 -v 0 -i 0 KrefGet: 0x800c90304 =3D 1 KrefGet: 0x800c90304 =3D 2 KrefGet: 0x800c9083c =3D 1 KrefGet: 0x800c9092c =3D 1 Added device 0x800ca4d08 KrefGet: 0x800ca4d0c =3D 1 KrefGet: 0x800ca4d0c =3D 2 size =3D 622592 alloc_nr =3D 0 KrefPut: 0x800ca4d0c =3D 2 >From dmesg: ugen6.2: <vendor 0x17ef> at usbus6
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