topic You need add sm->init() in Software Archive

Cannot get Device Instance

John_M_9 — Tue, 20 Oct 2015 18:02:28 GMT

Hi All,

I have seen numerous examples of getting the device instance; looks simple enough. However, I am getting a null return from QueryDevice(). I have tried (using c++):

	// Create a PXCSenseManager instance
	PXCSenseManager *sm = PXCSenseManager::CreateInstance();
	if (!sm)
		return 1;

	// find Device Instance
	PXCCapture::Device *cp = sm->QueryCaptureManager()->QueryDevice();
	if (!cp)
	{
		sm->Release();
		return 3;
	}

and

	// Create a PXCSenseManager instance
	PXCSenseManager *sm = PXCSenseManager::CreateInstance();
	if (!sm)
		return 1;

	// find Capture Manager Instance
	PXCCaptureManager *cm = sm->QueryCaptureManager();
	if (!cm)
	{
		sm->Release();
		return 2;
	}

	// find Device Instance
	PXCCapture::Device *cp = cm->QueryDevice();
	if (!cp)
	{
		sm->Release();
		return 3;
	}

QueryCaptureManager() returns a non-NULL cm, but QueryDevice() returns a NULL for cp.

Any help would be greatly appreciated. Thanks!

John

Probably should have

John_M_9 — Tue, 20 Oct 2015 18:07:04 GMT

Probably should have mentioned: Using R200 camera with latest SDK

You need add sm->init()

Xusheng_L_Intel — Tue, 20 Oct 2015 20:54:32 GMT

You need add sm->init() before PXCCaptureManager *cm = sm->QueryCaptureManager(); Thanks!

That did it, David! Thank

John_M_9 — Wed, 21 Oct 2015 14:25:54 GMT

That did it, David! Thank you very much!

Is it possible to get a

Aaron_S_4 — Thu, 05 Nov 2015 15:32:42 GMT

Is it possible to get a PXCMCapture::Device without initializing SenseManager?

I want to be able to enumerate allowed stream configurations (e.g. which configurations of color+depth are possible) before calling SenseManager::init()

The "Enumerating Streams" and "Enumerating Stream Configurations" sections of the SDK Documentation assume that we already have a reference to the device, but as best I can tell, the only way to get the actual Device (and not just DeviceInfo) is to initialize SenseManager, but that seems so round-about.

Yes, there is another option:

Henning_J_ — Thu, 05 Nov 2015 15:46:34 GMT

Yes, there is another option: create a PXCMCapture (by using PXCSession::CreateImpl()), then use PXCCapture::CreateDevice().

Something like this:

PXCSession::ImplDesc desc={};
desc.group=PXCSession::IMPL_GROUP_SENSOR;
desc.subgroup=PXCSession::IMPL_SUBGROUP_VIDEO_CAPTURE;

for (int i=0;;i++) {
   PXCSession::ImplDesc desc1;
   if (session->QueryImpl(&desc,i,&desc1)<PXC_STATUS_NO_ERROR) break;

   PXCCapture *capture;
   session->CreateImpl<PXCCapture>(&desc1,&capture);

   for (int d=0;;d++) {
       PXCCapture::DeviceInfo dinfo;
       if (capture->QueryDevice(d,&dinfo)<PXC_STATUS_NO_ERROR) break;
       
	   PXCCapture::Device *device = capture->CreateDevice(d);
	   break;
   }
   capture->Release();
}