Re: [patch] propagating controls in libv4l2 was Re: support autofocus / autogain in libv4l2

Hi! > > Now. There is autogain support in libv4lconvert, but it expects to use > > same fd for camera and for the gain... which does not work with > > subdevs. > > > > Of course, opening subdevs by name like this is not really > > acceptable. But can you suggest a method that is? > > There are

Re: [patch] propagating controls in libv4l2 was Re: support autofocus / autogain in libv4l2

Hi! > > + devices[index].subdev_fds[0] = SYS_OPEN("/dev/video_sensor", O_RDWR, 0); > > + devices[index].subdev_fds[1] = SYS_OPEN("/dev/video_focus", O_RDWR, 0); > > + devices[index].subdev_fds[2] = -1; > > Hardcoding names here is not a good idea. Ideally, it should open > the MC, using

Re: [patch] propagating controls in libv4l2 was Re: support autofocus / autogain in libv4l2

Em Wed, 26 Apr 2017 12:53:00 +0200 Pavel Machek escreveu: > Hi! > > > > > IMO, the best place for autofocus is at libv4l2. Putting it on a > > > > separate "video server" application looks really weird for me. > > > > > > Well... let me see. libraries are quite limited -- it

Re: [patch] propagating controls in libv4l2 was Re: support autofocus / autogain in libv4l2

Hi Pavel, Em Wed, 26 Apr 2017 12:53:00 +0200 Pavel Machek escreveu: > Hi! > > > > > IMO, the best place for autofocus is at libv4l2. Putting it on a > > > > separate "video server" application looks really weird for me. > > > > > > Well... let me see. libraries are quite

Re: support autofocus / autogain in libv4l2

On Tue 2017-04-25 12:53:27, Nicolas Dufresne wrote: > Le mardi 25 avril 2017 à 10:05 +0200, Pavel Machek a écrit : > > Well, fd's are hard, because application can do fork() and now > > interesting stuff happens. Threads are tricky, because now you have > > locking etc. > > > > libv4l2 is

[patch] propagating controls in libv4l2 was Re: support autofocus / autogain in libv4l2

Hi! > > > IMO, the best place for autofocus is at libv4l2. Putting it on a > > > separate "video server" application looks really weird for me. > > > > Well... let me see. libraries are quite limited -- it is hard to open > > files, or use threads/have custom main loop. It may be useful to > >

Re: support autofocus / autogain in libv4l2

Le mardi 25 avril 2017 à 13:30 +0200, Pali Rohár a écrit : > Pinos (renamed from PulseVideo) > > https://blogs.gnome.org/uraeus/2015/06/30/introducing-pulse-video/ > https://cgit.freedesktop.org/~wtay/pinos/ > > But from git history it looks like it is probably dead now... This is also

Re: support autofocus / autogain in libv4l2

Le mardi 25 avril 2017 à 10:05 +0200, Pavel Machek a écrit : > Well, fd's are hard, because application can do fork() and now > interesting stuff happens. Threads are tricky, because now you have > locking etc. > > libv4l2 is designed to be LD_PRELOADED. That is not really feasible > with

Re: support autofocus / autogain in libv4l2

Le mardi 25 avril 2017 à 10:08 +0200, Pali Rohár a écrit : > On Tuesday 25 April 2017 10:05:38 Pavel Machek wrote: > > > > It would be nice if more than one application could be > > > > accessing the > > > > camera at the same time... (I.e. something graphical running > > > > preview > > > > then

Re: support autofocus / autogain in libv4l2

On Tuesday 25 April 2017 14:28:20 Pavel Machek wrote: > On Tue 2017-04-25 13:30:09, Pali Rohár wrote: > > On Tuesday 25 April 2017 13:23:30 Pavel Machek wrote: > > > Hi! > > > On Tue 2017-04-25 10:08:15, Pali Rohár wrote: > > > > On Tuesday 25 April 2017 10:05:38 Pavel Machek wrote: > > > > > > >

Re: support autofocus / autogain in libv4l2

On Tue 2017-04-25 13:30:09, Pali Rohár wrote: > On Tuesday 25 April 2017 13:23:30 Pavel Machek wrote: > > Hi! > > On Tue 2017-04-25 10:08:15, Pali Rohár wrote: > > > On Tuesday 25 April 2017 10:05:38 Pavel Machek wrote: > > > > > > It would be nice if more than one application could be accessing

Re: support autofocus / autogain in libv4l2

On Tuesday 25 April 2017 13:23:30 Pavel Machek wrote: > Hi! > On Tue 2017-04-25 10:08:15, Pali Rohár wrote: > > On Tuesday 25 April 2017 10:05:38 Pavel Machek wrote: > > > > > It would be nice if more than one application could be accessing the > > > > > camera at the same time... (I.e. something

Re: support autofocus / autogain in libv4l2

Hi! On Tue 2017-04-25 10:08:15, Pali Rohár wrote: > On Tuesday 25 April 2017 10:05:38 Pavel Machek wrote: > > > > It would be nice if more than one application could be accessing the > > > > camera at the same time... (I.e. something graphical running preview > > > > then using command line tool

Re: support autofocus / autogain in libv4l2

Hi! > > Umm, and it looks like libv4l can not automatically convert from > > GRBG10.. and if it could, going through RGB24 would probably be too > > slow on this device :-(. > > I suspect it shouldn't be hard to add support for GRBG10. It already > supports 8 and 16 bits Bayer formats, at

Re: support autofocus / autogain in libv4l2

Hi! > > > Please don't add a new application under lib/. It is fine if you want > > > some testing application, if the ones there aren't enough, but please > > > place it under contrib/test/. > > > > > > You should likely take a look at v4l2grab first, as it could have > > > almost everything

Re: support autofocus / autogain in libv4l2

On Tuesday 25 April 2017 10:05:38 Pavel Machek wrote: > > > It would be nice if more than one application could be accessing the > > > camera at the same time... (I.e. something graphical running preview > > > then using command line tool to grab a picture.) This one is > > > definitely not

Re: support autofocus / autogain in libv4l2

Hi! > > > > For focus to be useful, we need autofocus implmented > > > > somewhere. Unfortunately, v4l framework does not seem to provide good > > > > place where to put autofocus. I believe, long-term, we'll need some > > > > kind of "video server" providing this kind of services. > > > > > > >

Re: support autofocus / autogain in libv4l2

Em Tue, 25 Apr 2017 00:07:01 +0200 Pavel Machek escreveu: > Hi! > > > Please don't add a new application under lib/. It is fine if you want > > some testing application, if the ones there aren't enough, but please > > place it under contrib/test/. > > > > You should likely take a

Re: support autofocus / autogain in libv4l2

Em Mon, 24 Apr 2017 23:29:14 +0200 Pavel Machek escreveu: > Hi! > > > > For focus to be useful, we need autofocus implmented > > > somewhere. Unfortunately, v4l framework does not seem to provide good > > > place where to put autofocus. I believe, long-term, we'll need some > > >

Re: support autofocus / autogain in libv4l2

Hi! > Please don't add a new application under lib/. It is fine if you want > some testing application, if the ones there aren't enough, but please > place it under contrib/test/. > > You should likely take a look at v4l2grab first, as it could have > almost everything you would need. I really

Re: support autofocus / autogain in libv4l2

Hi! > > For focus to be useful, we need autofocus implmented > > somewhere. Unfortunately, v4l framework does not seem to provide good > > place where to put autofocus. I believe, long-term, we'll need some > > kind of "video server" providing this kind of services. > > > > Anyway, we probably

Re: support autofocus / autogain in libv4l2

Hi Pavel, Em Mon, 24 Apr 2017 11:30:59 +0200 Pavel Machek escreveu: > Hi! > > For focus to be useful, we need autofocus implmented > somewhere. Unfortunately, v4l framework does not seem to provide good > place where to put autofocus. I believe, long-term, we'll need some > kind

support autofocus / autogain in libv4l2

Hi! For focus to be useful, we need autofocus implmented somewhere. Unfortunately, v4l framework does not seem to provide good place where to put autofocus. I believe, long-term, we'll need some kind of "video server" providing this kind of services. Anyway, we probably don't want autofocus in