On Thu, 14 Jul 2011, Sakari Ailus wrote: > Hi all, > > I was thinking about the sensor binning controls. What wrong with just doing S_FMT on the subdev pad? Binning does in fact implement scaling. Thanks Guennadi > > I have a sensor which can do binning both horizontally and vertically, but > the two are connected. So, the sensor supports e.g. 3x1 and 1x3 binning but > not 3x3. > > However, most (I assume) sensors do not have dependencies between the two. > The interface which would be provided to the user still should be able to > tell what is supported, whether the two are independent or not. > > I have a few ideas how to achieve this. > > 1. Implement dependent binning as a menu control. The user will have an easy > way to enumerate binning and select it. If horizontal and vertical binning > factors are independent, two integer controls are provided. The downside is > that there are two ways to do this, and integer to string and back > conversions involved. > > 2. Menu control is used all the time. The benefit is that the user gets a > single interface, but the downside is that if there are many possible > binning factors both horizontally and vertically, the size of the menu grows > large. Typically binning ends at 2 or 4, though. > > 3. Implement two integer controls. The user is responsible for selecting a > valid configuration. A way to enumerate possible values would have to be > implemented. One option would be an ioctl but I don't like the idea. > > Comments are welcome as always. > > Cheers, > > -- > Sakari Ailus > sakari.ailus@xxxxxx > -- > 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 > --- Guennadi Liakhovetski, Ph.D. Freelance Open-Source Software Developer http://www.open-technology.de/ -- 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
