On Wednesday, March 02, 2011 18:51:43 Guennadi Liakhovetski wrote: > ...Just occurred to me: > > On Mon, 28 Feb 2011, Guennadi Liakhovetski wrote: > > > On Mon, 28 Feb 2011, Guennadi Liakhovetski wrote: > > > > > On Mon, 28 Feb 2011, Hans Verkuil wrote: > > > > > > > Does anyone know which drivers stop capture if there are no buffers available? > > > > I'm not aware of any. > > > > > > Many soc-camera hosts do that. > > > > > > > I think this is certainly a good initial approach. > > > > > > > > Can someone make a list of things needed for flash/snapshot? So don't look yet > > > > at the implementation, but just start a list of functionalities that we need > > > > to support. I don't think I have seen that yet. > > > > > > These are not the features, that we _have_ to implement, these are just > > > the ones, that are related to the snapshot mode: > > > > > > * flash strobe (provided, we do not want to control its timing from > > > generic controls, and leave that to "reasonable defaults" or to > > > private controls) > > Wouldn't it be a good idea to also export an LED (drivers/leds/) API from > our flash implementation? At least for applications like torch. Downside: > the LED API itself is not advanced enough for all our uses, and exporting > two interfaces to the same device is usually a bad idea. Still, > conceptually it seems to be a good fit. I believe we discussed LEDs before (during a discussion about adding illuminator controls). I think the preference was to export LEDs as V4L controls. In general I am no fan of exporting multiple interfaces. It only leads to double maintenance and I see no noticable advantage to userspace, only confusion. Just my 2 cents. Regards, Hans > > Thanks > Guennadi > > > > * trigger pin / command > > > * external exposure > > > * exposure mode (ERS, GRR,...) > > > * use "trigger" or "shutter" for readout > > > * number of frames to capture > > > > Add > > > > * multiple videobuffer queues > > > > to the list > > --- > 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 > > -- Hans Verkuil - video4linux developer - sponsored by Cisco -- 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
