Linux Plumbers Conf 2009

Excerpt

Description

Last years libv4l2 presentation ended with a slide future with
the following bullet points (abbreviated):

• Add emulated controls
• Better handle rotation
• Software image quality enhancements:
  – White balance
  – Normalize
• Emulated controls persistency

Actually quite a few of these have materialized in the recent
0.5.9x releases of libv4l. The talk will start with a short
talk on what has been implemented, and more importantly how
and the impact of this on existing applications and drivers.

Last year Brandon Philips gave a talk about sharing video devices between multiple applications using a userspace video server. This is the next frontier for v4l userspace, the second
part of this talk will describe several ideas how to handle
this and the advantages and disadvantages of each, after which
the intent is to further discuss this with the audience.

Speakers

• 

  Hans de Goede

  Fedora
  • Website: http://hansdegoede.livejournal.com/

  Biography

  I’ve been a FOSS developer for 10+ years. I started writing
  kernel drivers when I got a motherboard with an unsupported
  hardware monititoring IC (The Abit ųGuru).

  End 2007 I wanted to do something for the greater good of Linux,
  I decided to start working on webcam compatibility as many webcams
  did have drivers floating around, but of mixed quality and most
  where outside the mainline tree because they did decompression
  of various cam specific format inside the kernel which was not
  acceptable in the mainline kernel.

  So I started working on getting drivers into the mainline kernel,
  for which I soon joined forces with Jean-Francois Moine, who was at that time porting the usb webcam driver framework gspca to v4l2
  and cleaning it up for the mainline kernel, and started rewriting existing drivers using that framework.

  I’m probably best known in v4l land for libv4l, the userspace library I wrote to more or less transparently handle the decompression of many proprietary webcam video formats in userspace, fixing the decompression part of the problem.

• 

  Brandon Philips

  Novell
  • Website: http://ifup.org/

  Biography

  Brandon is a Kernel developer at Novell/SuSE Labs. He has presented at several technical conferences in the past including FreedomHEC Taipei, Linux Plumbers Conf and Ignite Portland 2 . In his spare time he tinkers with electronics and software, bikes, hikes and builds robots. For more information checkout his site.