Hi Hans, On Monday 20 December 2010 14:09:40 Hans Verkuil wrote: > On Monday, December 20, 2010 13:48:51 Laurent Pinchart wrote: > > > > What if the application wants to change the resolution during capture ? > > It will have to stop capture, call REQBUFS(0), change the format, > > request buffers and restart capture. If filehandle ownership is dropped > > after REQBUFS(0) that will open the door to a race condition. > > That's why S_PRIORITY was invented. Right, I should implement that. I think the documentation isn't clear though. What is the background priority for exactly ? And the "unset" priority ? Are other applications allowed to change controls when an application has the record priority ? In general I find the priority ioctls underspecified, that's why I haven't implemented them yet. On a side note, I've just tested the latest uvcvideo driver, and I've successfully captured video using a second application after calling REQBUFS(0) in a first application. -- Regards, Laurent Pinchart -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
