[vlc-devel] Re: [MOD] Preventing flooding with ioctls

Laurent Aimar fenrir at via.ecp.fr
Thu Feb 12 18:56:58 CET 2004

On Thu, Feb 12, 2004, System administration wrote:
> Hi there,
> I have done another small modification. If you remove a hot-pluggable video
> device, like an usb web cam, during capturing, vlc floods the driver with
> ioctls. This leads to Kernel Ooops in some drivers.
> The modified v4l.c module does the following now:
> "GrabVideo" returns "VLC_ETIMEOUT" if the question "Did we wait long enough"
> can be answered with yes. If there is a real error in "GrabCapture" or
> "GrabMJPEG", the code "VLC_EGENERIC" is returned. So the calling function
> can distinguish between these two situations. "VLC_EGENERIC" was always
> returned before.
> The function "Read" uses this information to leave the while-loop in case of
> an error, and it returns a "-1" to the calling function. "Read" calls
> "msleep", as it was before, in case of a VLC_ETIMEOUT.
> The brightness-control stuff described below is still in the code. Please
> feel free to use, modify or ignore this file. A short feedback would be
> nice.
> Bye,
 VLC_ETIMEOUT part applied to CVS. The brightness-control stuff was
already applied.

 Thanks for the patches.


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