void initFromContextFile() { /* Initialize Context from XML file + lookup generators of the needed type: - depth (for depth images) - image (for RGB images) - skeleton (for Skeleton position and tracking) Errors in the XML file, lack thereof or lack of generators of the mentioned types will stop the program altogether. */ printf("xml file is: %s\n", getKinectXMLConfig()); XnStatus nRetVal = XN_STATUS_OK; xn::EnumerationErrors errors; if (g_useSpecifiedDevice) { xnLogInitFromXmlFile(getKinectXMLConfig()); nRetVal = g_Context.Init(); if (nRetVal != XN_STATUS_OK) { printf("Open failed: %s\n", xnGetStatusString(nRetVal)); exit(1); } // find devices xn::NodeInfoList list; nRetVal = g_Context.EnumerateProductionTrees(XN_NODE_TYPE_DEVICE, NULL, list, &errors); if (nRetVal != XN_STATUS_OK) { printf("Enumerate devices failed: %s\n", xnGetStatusString(nRetVal)); exit(1); } for (xn::NodeInfoList::Iterator it = list.Begin(); it != list.End(); ++it) { xn::NodeInfo deviceNodeInfo = *it; xn::Device deviceNode; deviceNodeInfo.GetInstance(deviceNode); XnBool bExists = deviceNode.IsValid(); if (!bExists) { g_Context.CreateProductionTree(deviceNodeInfo, deviceNode); // this might fail. } if (deviceNode.IsValid() && deviceNode.IsCapabilitySupported(XN_CAPABILITY_DEVICE_IDENTIFICATION)) { deviceNodeInfo.GetAdditionalData(); const XnChar* ci = deviceNodeInfo.GetCreationInfo(); if (deviceMatches(std::string(ci))) { // now run the rest of the XML nRetVal = g_Context.RunXmlScriptFromFile(getKinectXMLConfig(), g_scriptNode, &errors); if (nRetVal != XN_STATUS_OK) { printf("run xml script from file failed: %s\n", xnGetStatusString(nRetVal)); exit(1); } } else { // release the device if we created it if (!bExists && deviceNode.IsValid()) { deviceNode.Release(); } } } } } else { nRetVal = g_Context.InitFromXmlFile(getKinectXMLConfig(), g_scriptNode, &errors); if (nRetVal == XN_STATUS_NO_NODE_PRESENT) { XnChar strError[1024]; errors.ToString(strError, 1024); printf("%s\n", strError); exit(1); } else if (nRetVal != XN_STATUS_OK) { printf("Open failed: %s\n", xnGetStatusString(nRetVal)); exit(1); } } if (g_Context.FindExistingNode(XN_NODE_TYPE_DEPTH, g_DepthGenerator) != XN_STATUS_OK) { printf("XML file should contain a depth generator\n"); exit(1); } if (g_Context.FindExistingNode(XN_NODE_TYPE_IMAGE, g_ImageGenerator) != XN_STATUS_OK) { printf("XML file should contain an image generator\n"); exit(1); } if (g_Context.FindExistingNode(XN_NODE_TYPE_USER, g_UserGenerator) != XN_STATUS_OK) { printf("XML file should contain an user generator\n"); exit(1); } if (!g_UserGenerator.IsCapabilitySupported(XN_CAPABILITY_SKELETON)) { printf("Supplied user generator doesn't support skeleton\n"); exit(1); } }