[SailfishDevel] Camera flash control. Wired to Qt level or not?

[Mohammed Hassan]

searchAndLock() should work as long as you are in a dark
place (that's what LED torch is for ;-))
and make sure the focus mode is set to fixed focus mode.

Good luck!

Cheers,

On Sat, Nov 16, 2013 at 05:35:47PM +0200, Artem Marchenko wrote:
>  I used to work a little with GStreamer in the past, it wasn't much fun,
>  though I was doing video processing, not just LED manipulation..
>  Oh well, I try searchAndLock trick, if it doesn't work, I'll need to
>  think if I am into diving to gstreamer or into waiting for the Torch
>  API. Technically, waiting for Torch is correct probably, I am just
>  driven by the opportunity to make the very first torch for Jolla :)
>  Cheers,
>  Artem.
> 
>  On Sat, Nov 16, 2013 at 5:28 PM, Mohammed Hassan
>  <[1]mohammed.hassan at jollamobile.com> wrote:
> 
>  Hi Artem,
> 
>  On Sat, Nov 16, 2013 at 04:43:57PM +0200, Artem Marchenko wrote:
>  > Thanks, Mohammed.
>  >
>  > I know that torch mode is not supported, but ON mode is. So my
>  current
>  > workaround idea is to make phone think it shoots video with flash
>  mode
>  > ON (ok, we can even shoot video for real if needed). Assumption is
>  that
>  > video + flash mode ON should make phone record video with light
>  > constantly ON. Currently it doesn't work for me, maybe because
>  > assumption is wrong or maybe I am just using some api the wrong way.
> 
>  It will not work that way. There is a special mode for torch light
>  but it's
>  not yet been implemented.
> 
>  > 2nd workaround idea is to make phone seekAndLock all the time
>  causing
>  > flash to be ON. That is likely to result in a multitude of short
>  > flashes though.
> 
>  That can work but it will be slow "light bursts".
>  A 3rd option would be going even below GSTreamer and Qt and talk to
>  the camera HW directly.
>  This is harder -trust me- and will tie you to the hardware.
>  I am really sorry I don't have a solution for you :(
>  I can only promise it will be available soon in an update.
>  Cheers,
> 
>  > When you record video with the flash ON in a system camera app, does
>  it
>  > cause LED to have kith ON all the time?
>  >
>  > Artem.
>  >
>  > On Saturday, November 16, 2013, Mohammed Hassan wrote:
>  >
>  > Hi Artem,
>  > On Sat, Nov 16, 2013 at 02:48:30PM +0200, Artem Marchenko wrote:
>  > > Hi All
>  > > *Context*
>  > > I am trying to build a flashlight app, but the same question is
>  > valid
>  > > for any camera app that wants to shoot photos/videos in low
>  > light.
>  > > *The problem*
>  > > I am trying to control LED flash by setting flash mode to ON (api
>  > > confirms that ON mode is supported) and starting camera. Nothing
>  > > happens. I also tried actually capturing photo, shooting video
>  > and
>  > > seekAndLocking. I don't have a device myself, but kind people on
>  > IRC
>  > > told that only two short LED flashes happen (during seeking for
>  > focus
>  > > probably).
>  > > Could somebody, please, advise how to control flash in Sailfish
>  > OS? Or
>  > > maybe you could confirm that libhybris flash control just isn't
>  > wired
>  > > to Qt level?
>  > This is unfortunately not supported.
>  > The only flash modes supported now are: on, off or auto.
>  > Torch light mode is not yet supported but I assure you it will come
>  > in an update soon.
>  > I am not that familiar with Qt but I know it's a limitation of the
>  > layer underneath Qt.
>  > The best you can do now is to wait for the phone itself and tinker
>  > as you like and I am
>  > sure you will manage to do it :-)
>  > Cheers,
>  > P.S. libhybris camera wrapper is not used by sailfish. It might or
>  > might not work.
>  > _______________________________________________
>  > SailfishOS.org Devel mailing list
>  >
>  > --
>  > Artem Marchenko
> 
>  > [1][2]http://agilesoftwaredevelopment.com
>  > [2][3]http://twitter.com/AgileArtem
>  >
>  > References
>  >
>  > 1. [4]http://agilesoftwaredevelopment.com/
>  > 2. [5]http://twitter.com/AgileArtem
> 
>  --
>  Artem Marchenko
>  [6]http://agilesoftwaredevelopment.com
>  [7]http://twitter.com/AgileArtem
> 
> References
> 
>  1. mailto:mohammed.hassan at jollamobile.com
>  2. http://agilesoftwaredevelopment.com/
>  3. http://twitter.com/AgileArtem
>  4. http://agilesoftwaredevelopment.com/
>  5. http://twitter.com/AgileArtem
>  6. http://agilesoftwaredevelopment.com/
>  7. http://twitter.com/AgileArtem