On Tuesday 05 April 2011 14:40:16 Hans Verkuil wrote: > On Tuesday, April 05, 2011 14:02:17 Laurent Pinchart wrote: > > On Monday 04 April 2011 10:06:47 Hans Verkuil wrote: > > > > On Mon, 4 Apr 2011, Hans Verkuil wrote: > > > >> On Friday, April 01, 2011 10:13:02 Guennadi Liakhovetski wrote: > > [snip] > > > > > BTW, REQBUFS and CREATE/DESTROY_BUFS should definitely co-exist. > > > REQBUFS is compulsory, while CREATE/DESTROY are optional. > > > > Drivers must support REQBUFS and should support CREATE/DESTROY, but I > > think applications should not be allowed to mix calls. > > Why not? The videobuf2-core.c implementation shouldn't care about that, so > I don't see why userspace should care.
Because it makes the API semantics much more complex to define. We would have to precisely define interactions between REQBUFS and CREATE/DESTROY. That will be error-prone, for very little benefits (if any at all). If an application is aware of the CREATE/DESTROY ioctls and wants to use them, why would it need to use REQBUFS ? -- Regards, Laurent Pinchart -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
