Thanks a lot, Mohammed! There are two sliders in the app to control how often searchAndLock are called and how soon unlock is to be called after it.
1. Could you, please, play with it and see which values seem to give better results? For now I will be fine with any more or less sane combination. 2. Also could you describe the result and how it behaves when you change these values? or well.. it is also external light dependent. Let's say if you go into dark place (where flashlight is to be used anyway), does LED produce light soft and often enough to make, say, locating keys in a bag possible? Or is it more like rare annoying flashes? 3. Unlock That is something I don't understand :/ What do you mean that gstreamer output tells I have to call unlock? Can you then play with the unlocking timer too? Maybe there is a magic combination of values that will keep light almost constant? For example, if we start searchAndLock() as often as every 50ms and don't call unlock() ever. Best regards, Artem. On Sat, Nov 16, 2013 at 6:56 PM, Mohammed Hassan < mohammed.has...@jollamobile.com> wrote: > Great job Artem > > I tried it and it works (it pulses as expected). > > If I point camera to a lamp then the led lights up for a long time. > If I direct it away from the lamp then the pulses are shorter. > > I personally am not sure about the Qt API but from gstreamer output, I see > that > you must call unlock(). > > I will try to test it tomorrow morning and see if it will still fire or > not. > > I guess we also need to tweak the timer for locking and unlocking but I > don't > really have any suggestions. > > Cheers, > > On Sat, Nov 16, 2013 at 06:22:32PM +0200, Artem Marchenko wrote: > > I prepared the next test app, that starts searchAndLock() every given > > number of ms and optionally does unlock() soon after it (not sure if > > you have to unlock before starting the next searchAndLock() ). Plus you > > can play with the search mode if Manual happens to be not good enough. > > Anybody willing to try on real hardware? Preferably both in dark and > > light environment (maybe flash starts in dark conditions only as > > Mohammed told). > > Link to ARM RPM - [1]http://bit.ly/videofla109 > > Or here's full source code > > - [2]https://github.com/amarchen/video-flash-trial/tree/v0.1-9/ > > Cheers, > > Artem. > > > > On Sat, Nov 16, 2013 at 6:05 PM, Mohammed Hassan > > <[3]mohammed.has...@jollamobile.com> wrote: > > > > The point is not to be in continuous focus mode (CAF) because if you > > are in that mode > > then camera might not try to focus if it happens to have focus > > already (CAF mode = camera > > tries to focus all the time). > > In manual or fixed focus modes, camera will not try to focus all the > > time and will instead > > wait until it is instructed to focus and then it will do it. > > That is simply the reason. > > CAF focus is not guaranteed to be out of focus but manual is > > guaranteed to be out > > of focus ;-) > > Cheers, > > > > On Sat, Nov 16, 2013 at 05:58:30PM +0200, Artem Marchenko wrote: > > > Can you explain why Fixed (manual) focus mode? :/ > > > Sorry to ask for details, it's a little difficult without the device > > at > > > hand? > > > Are you trying to tell that in a Fixed mode camera will seek for > > focus > > > forever? > > > Artem. > > > On Sat, Nov 16, 2013 at 5:55 PM, Mohammed Hassan > > > > > <[1][4]mohammed.has...@jollamobile.com> wrote: > > > > > > 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][2][5]mohammed.has...@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][3][6]http://agilesoftwaredevelopment.com > > > > > [2][3][4][7]http://twitter.com/AgileArtem > > > > > > > > > > References > > > > > > > > > > 1. [4][5][8]http://agilesoftwaredevelopment.com/ > > > > > 2. [5][6][9]http://twitter.com/AgileArtem > > > > > > > > -- > > > > Artem Marchenko > > > > [6][7][10]http://agilesoftwaredevelopment.com > > > > [7][8][11]http://twitter.com/AgileArtem > > > > > > > > References > > > > > > > > 1. mailto:[9][12]mohammed.has...@jollamobile.com > > > > 2. [10][13]http://agilesoftwaredevelopment.com/ > > > > 3. [11][14]http://twitter.com/AgileArtem > > > > 4. [12][15]http://agilesoftwaredevelopment.com/ > > > > 5. [13][16]http://twitter.com/AgileArtem > > > > 6. [14][17]http://agilesoftwaredevelopment.com/ > > > > 7. [15][18]http://twitter.com/AgileArtem > > > > > > -- > > > Artem Marchenko > > > [16][19]http://agilesoftwaredevelopment.com > > > [17][20]http://twitter.com/AgileArtem > > > > > > References > > > > > > 1. mailto:[21]mohammed.has...@jollamobile.com > > > 2. mailto:[22]mohammed.has...@jollamobile.com > > > 3. [23]http://agilesoftwaredevelopment.com/ > > > 4. [24]http://twitter.com/AgileArtem > > > 5. [25]http://agilesoftwaredevelopment.com/ > > > 6. [26]http://twitter.com/AgileArtem > > > 7. [27]http://agilesoftwaredevelopment.com/ > > > 8. [28]http://twitter.com/AgileArtem > > > 9. mailto:[29]mohammed.has...@jollamobile.com > > > 10. [30]http://agilesoftwaredevelopment.com/ > > > 11. [31]http://twitter.com/AgileArtem > > > 12. [32]http://agilesoftwaredevelopment.com/ > > > 13. [33]http://twitter.com/AgileArtem > > > 14. [34]http://agilesoftwaredevelopment.com/ > > > 15. [35]http://twitter.com/AgileArtem > > > 16. [36]http://agilesoftwaredevelopment.com/ > > > 17. [37]http://twitter.com/AgileArtem > > > > -- > > Artem Marchenko > > [38]http://agilesoftwaredevelopment.com > > [39]http://twitter.com/AgileArtem > > > > References > > > > 1. http://bit.ly/videofla109 > > 2. https://github.com/amarchen/video-flash-trial/tree/v0.1-9/ > > 3. mailto:mohammed.has...@jollamobile.com > > 4. mailto:mohammed.has...@jollamobile.com > > 5. mailto:mohammed.has...@jollamobile.com > > 6. http://agilesoftwaredevelopment.com/ > > 7. http://twitter.com/AgileArtem > > 8. http://agilesoftwaredevelopment.com/ > > 9. http://twitter.com/AgileArtem > > 10. http://agilesoftwaredevelopment.com/ > > 11. http://twitter.com/AgileArtem > > 12. mailto:mohammed.has...@jollamobile.com > > 13. http://agilesoftwaredevelopment.com/ > > 14. http://twitter.com/AgileArtem > > 15. http://agilesoftwaredevelopment.com/ > > 16. http://twitter.com/AgileArtem > > 17. http://agilesoftwaredevelopment.com/ > > 18. http://twitter.com/AgileArtem > > 19. http://agilesoftwaredevelopment.com/ > > 20. http://twitter.com/AgileArtem > > 21. mailto:mohammed.has...@jollamobile.com > > 22. mailto:mohammed.has...@jollamobile.com > > 23. http://agilesoftwaredevelopment.com/ > > 24. http://twitter.com/AgileArtem > > 25. http://agilesoftwaredevelopment.com/ > > 26. http://twitter.com/AgileArtem > > 27. http://agilesoftwaredevelopment.com/ > > 28. http://twitter.com/AgileArtem > > 29. mailto:mohammed.has...@jollamobile.com > > 30. http://agilesoftwaredevelopment.com/ > > 31. http://twitter.com/AgileArtem > > 32. http://agilesoftwaredevelopment.com/ > > 33. http://twitter.com/AgileArtem > > 34. http://agilesoftwaredevelopment.com/ > > 35. http://twitter.com/AgileArtem > > 36. http://agilesoftwaredevelopment.com/ > > 37. http://twitter.com/AgileArtem > > 38. http://agilesoftwaredevelopment.com/ > > 39. http://twitter.com/AgileArtem > -- Artem Marchenko http://agilesoftwaredevelopment.com http://twitter.com/AgileArtem
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