XnStatus Enumerate(XnUInt16 nVendor, XnUInt16 nProduct, XnStringsHash& devicesSet)
{
XnStatus nRetVal = XN_STATUS_OK;
const XnUSBConnectionString* astrDevicePaths;
XnUInt32 nCount;
nRetVal = xnUSBEnumerateDevices(nVendor, nProduct, &astrDevicePaths, &nCount);
XN_IS_STATUS_OK(nRetVal);
for (XnUInt32 i = 0; i < nCount; ++i)
{
nRetVal = devicesSet.Set(astrDevicePaths[i], NULL);
XN_IS_STATUS_OK(nRetVal);
}
xnUSBFreeDevicesList(astrDevicePaths);
return (XN_STATUS_OK);
}
XnStatus XnFileDevice::HandleStreamRemoved(const XnChar* strName)
{
XnStatus nRetVal = XN_STATUS_OK;
// check for specific case: all streams are removed and then end-of-file is reached.
// in this case, we don't really want to destroy streams, just wrap around.
XnStringsHash StreamsToRemove;
nRetVal = StreamsToRemove.Set(strName, NULL);
XN_IS_STATUS_OK(nRetVal);
XnPackedDataType nType = XN_PACKED_STREAM_REMOVED;
XnUInt32 nPositionBefore;
while (TRUE)
{
nRetVal = m_pInputStream->Tell(&nPositionBefore);
XN_IS_STATUS_OK(nRetVal);
nRetVal = m_pDataPacker->ReadNextObject(&nType);
XN_IS_STATUS_OK(nRetVal);
if (nType == XN_PACKED_STREAM_REMOVED)
{
XnChar strTempName[XN_DEVICE_MAX_STRING_LENGTH];
nRetVal = m_pDataPacker->ReadStreamRemoved(strTempName);
XN_IS_STATUS_OK(nRetVal);
nRetVal = StreamsToRemove.Set(strTempName, NULL);
XN_IS_STATUS_OK(nRetVal);
}
else
{
break;
}
}
if (nType != XN_PACKED_END)
{
// Not the case we were looking for. Remove those streams.
for (XnStringsHash::Iterator it = StreamsToRemove.begin(); it != StreamsToRemove.end(); ++it)
{
nRetVal = m_pNotifications->OnNodeRemoved(m_pNotificationsCookie, it.Key());
XN_IS_STATUS_OK(nRetVal);
XnNodeInfo* pNodeInfo;
m_nodeInfoMap.Get(it.Key(), pNodeInfo);
XN_DELETE(pNodeInfo->pXnCodec);
m_nodeInfoMap.Remove(it.Key());
m_ignoreNewNodes.Remove(it.Key());
}
m_bNodeCollectionChanged = TRUE;
}
// in any case, the last object we read wasn't handled yet (end-of-stream or another event), so
// seek back, so it will be handled.
nRetVal = m_pInputStream->Seek(nPositionBefore);
XN_IS_STATUS_OK(nRetVal);
return (XN_STATUS_OK);
}
