On Tue, Jul 08, 2014 at 01:07:27PM +0200, Hans Verkuil wrote: > Hans, > > I'd like your opinion on this. I really don't think the (sw) suffix serves > any purpose and is just confusing to the end-user. > > If you think that it is important that apps/users know that a control is emulated, > then I would propose adding a V4L2_CTRL_FLAG_EMULATED and setting it in > libv4lcontrol. Similar to the FMT_FLAG_EMULATED. IMHO it'd be important to know whether something is emulated or not, as emulation such as flipping carries often a significant CPU overhead. Format conversions are "easy" in this respect since not performing the conversion obviously avoids the overhead. I'm not sure if the information that a control is emulated is useful as such. For instance, how do you tell which choice of an emulated flipping control would avoid the overhead, if the sensor is mounted upside down? In this case the "default", "unflipped" configuration actually is implemented in software. This looks like another field next to default, min, max and step for QUERY_EXT_CTRL to me. Just my 5 euro cents. -- Kind regards, Sakari Ailus e-mail: sakari.ailus@xxxxxx XMPP: sailus@xxxxxxxxxxxxxx -- 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
