Le Vendredi 28 Septembre 2007 20:01, Greg KH a ?crit?: > On Fri, Sep 28, 2007 at 07:38:17PM +0200, Hans de Goede wrote: > > Greg KH wrote: > >> On Fri, Sep 28, 2007 at 02:13:37PM +0200, Bertrik Sikken wrote: > >>> Many webcam drivers are consequently maintained out of the > >>> official kernel and *DO* include decompression and bayer > >>> conversion to at least get webcams into a workable state. > >>> (Examples, there are many more: > >>> * Philips PWC driver: http://www.saillard.org/linux/pwc/ > >>> * Various other drivers: http://www.linux-projects.org > >>> * Spca driver: http://mxhaard.free.fr/spca5xx.html ) > >>> > >>> Some ideas: > >>> * create a user-space library for webcams that reads the compressed > >>> data from a v4l(2) device file, decompresses and unbayers it, > >>> then exposes it through a standard API to applications. > >>> * as above, instead of library, use gstreamer plug-ins (each compressed > >>> webcam format would have its own plugin, with perhaps a single plugin > >>> for unbayering). > >>> * bypass the kernel drivers entirely and use libusb to talk to the > >>> webcams. A problem is that (AFAIK) libusb does not support > >>> isochronous USB transfers and many cameras use this transfer mode. > >>> > >>> Any thoughts on how to improve Linux webcam support? > >> > >> Yes, work with the existing Linux video driver developers. They need > >> all the help they can get. > >> More information about them can be found at http://linuxtv.org > >> That being said, I have no objection to people helping on this project > >> to take some of the current out-of-tree drivers and cleaning them up to > >> get them included in the main kernel source tree. That would be an > >> immense help that the people here could provide. > >> Does anyone want to pick up one of the above mentioned drivers, or any > >> of the other ones floating around on the net, and do this? > > > > Actually I've been toying with the idea to work on the UVC webcam driver > > to make it suitable for upstream / mainstream kernel merging. I haven't > > contacted the UVC developers about this yet, as I've been swamped with > > other stuff. > > There is already a developer, Brandon (on the CC:) who is actively > working on this. You might want to work with him, if he needs any help. > His response might be delayed as he is traveling this weekend across > the globe... Is Brandon working with the Linux UVC team ? You should forward to the uvcvideo mailing list !! > > > But if the linuxdriverproject could help me in someway to do this that > > would be great! > > > > Actually I think that helping existing drivers reach the mainline might > > be a very worthwhile goal to add to the list of goals for this projects > > in general. > > I agree, feel free to edit the wiki and propose some drivers here on the > list that fall under that category. Off the top of my head, I know of a > few... > > thanks, > > greg k-h regards -- Michel Xhaard http://mxhaard.free.fr
