Kopete videodevice fixes #34

A number of fixes to Kopete's webcam support.

There is a problem using __LINUX_VIDEODEV2_H see comment.

@SlavekB These quick fixes were mostly based on my attempt to get my videocam working with Kopete (it showed a blue box instead) and I'm sure those require some refinement, that is also why I marked the PR as WIP. Thank you for the feedback. I'll get back to this PR when I have the time.

Great, looking forward for this. I also had a blue box, I remember

Good work, thank you.

Just for info, in Kopete -> Configure Kopete -> Devices tab, do you see any picture from the camera? I am testing in a VB box and I see just a black square, but I guess it could be because of VB. Just trying to undertand better.

Yes with the fix I see the picture from my webcam. Before that it did not find any device (drop down menu was empty) and showed a blue box.

I look forward to trying it today on my Pine 😺

Yes with the fix I see the picture from my webcam. Before that it did not find any device (drop down menu was empty) and showed a blue box.

I do see a VB camera in the drop down now, but no picture. But as said, it could be virtual box. I will try on another laptop where TDE is installed directly and see how it goes.

Tested on another laptop, works great!! Good work Philippe!!

I can confirm that on my Pine video now works! Although I don't know why two USB Camera devices are shown, but it is a matter between hardware and kernel 😺

Interestingly, it also showed two devices for me. /dev/v4l/by-id/ does in fact contain two devices for the same webcam (not sure why V4L2 does this). The difference between them seems to be, according to debug output from Kopete, that the second one does not have any controls (brightness, gamma, etc.), at least in my case.

I also have two devices, and if I try to select the second one I get a SEGV, both in VB and in the real laptop....

There was also a crash when I chose the second device. Obviously it is not the unusual behavior of my hardware and we should deal with it. For example, find the capabilities of device and exclude from the list that is not possible to use?

Probably yes. Initially I though that it was just my camera, but it seems to be commonplace. I'll try finding a solution when I find time for this.

Probably relevant: https://unix.stackexchange.com/questions/512759/multiple-dev-video-for-one-physical-device

 #define CLEAR(x) memset (&(x), 0, sizeof (x))
 #define STRINGIZE_(x) #x
 #define STRINGIZE(x) STRINGIZE_(x)

 #if (defined(__linux__) || defined(__FreeBSD__)) && defined(ENABLE_AV)
 #ifdef V4L2_CAP_VIDEO_CAPTURE
 #if defined(__LINUX_VIDEODEV2_H) /* V4L2 */

 	const TQString videodevice_dir_filter=TQString::fromLocal8Bit("video*");
 	// Check *video* symlinks in /dev/v4l/by-id
 	const TQString videodevice_dir_path=TQString::fromLocal8Bit("/dev/v4l/by-id/");

Kopete videodevice fixes #34

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