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 _______________________________________________ SailfishOS.org Devel mailing list
