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);
}
}
