XnStatus XnDeviceBase::GetSupportedStreams(const XnChar** aStreamNames, XnUInt32* pnStreamNamesCount)
{
XN_VALIDATE_OUTPUT_PTR(pnStreamNamesCount);
// NOTE: we allow aStreamName to be NULL
// first of all count streams
XnUInt32 nStreamsCount = m_SupportedStreams.Size();
// now check if we have enough room
if (nStreamsCount > *pnStreamNamesCount)
{
*pnStreamNamesCount = nStreamsCount;
return XN_STATUS_OUTPUT_BUFFER_OVERFLOW;
}
// now copy values
nStreamsCount = 0;
for (XnStringsSet::Iterator it = m_SupportedStreams.Begin(); it != m_SupportedStreams.End(); ++it)
{
aStreamNames[nStreamsCount] = it->Key();
nStreamsCount++;
}
*pnStreamNamesCount = nStreamsCount;
return XN_STATUS_OK;
}
XnStatus XnDeviceFileReader::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.
XnStringsSet StreamsToRemove;
nRetVal = StreamsToRemove.Set(strName);
XN_IS_STATUS_OK(nRetVal);
XnPackedDataType nType = XN_PACKED_STREAM_REMOVED;
XnUInt64 nPositionBefore;
for (;;)
{
nRetVal = GetIOStream()->Tell(&nPositionBefore);
XN_IS_STATUS_OK(nRetVal);
nRetVal = GetDataPacker()->ReadNextObject(&nType);
XN_IS_STATUS_OK(nRetVal);
if (nType == XN_PACKED_STREAM_REMOVED)
{
XnChar strTempName[XN_DEVICE_MAX_STRING_LENGTH];
nRetVal = GetDataPacker()->ReadStreamRemoved(strTempName);
XN_IS_STATUS_OK(nRetVal);
nRetVal = StreamsToRemove.Set(strTempName);
XN_IS_STATUS_OK(nRetVal);
}
else
{
break;
}
}
if (nType != XN_PACKED_END)
{
// Not the case we were looking for. Remove those streams.
for (XnStringsSet::Iterator it = StreamsToRemove.Begin(); it != StreamsToRemove.End(); ++it)
{
nRetVal = XnStreamReaderDevice::HandleStreamRemoved(it->Key());
XN_IS_STATUS_OK(nRetVal);
}
}
// 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 = GetIOStream()->Seek(nPositionBefore);
XN_IS_STATUS_OK(nRetVal);
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.
XnStringsSet StreamsToRemove;
nRetVal = StreamsToRemove.Set(strName);
XN_IS_STATUS_OK(nRetVal);
XnPackedDataType nType = XN_PACKED_STREAM_REMOVED;
XnUInt32 nPositionBefore;
for (;;)
{
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);
XN_IS_STATUS_OK(nRetVal);
}
else
{
break;
}
}
if (nType != XN_PACKED_END)
{
// Not the case we were looking for. Remove those streams.
for (XnStringsSet::Iterator it = StreamsToRemove.Begin(); it != StreamsToRemove.End(); ++it)
{
nRetVal = m_pNotifications->OnNodeRemoved(m_pNotificationsCookie, it->Key());
XN_IS_STATUS_OK(nRetVal);
XnNodeInfo* pNodeInfo = NULL;
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);
}