XnStatus XnFileDevice::Rewind()
{
XnStatus nRetVal = XN_STATUS_OK;
// go back to start of stream
nRetVal = m_pInputStream->Seek(XN_DEVICE_FILE_MAGIC_LEN);
XN_IS_STATUS_OK(nRetVal);
// read initial state
XN_PROPERTY_SET_CREATE_ON_STACK(state);
nRetVal = ReadInitialState(&state);
XN_IS_STATUS_OK(nRetVal);
// first handle current streams. remove or reset them
for (XnNodeInfoMap::Iterator it = m_nodeInfoMap.Begin(); it != m_nodeInfoMap.End(); ++it)
{
const XnChar* strName = it->Key();
if (m_bNodeCollectionChanged)
{
// we need to destroy all streams, and recreate them later
nRetVal = m_pNotifications->OnNodeRemoved(m_pNotificationsCookie, strName);
XN_IS_STATUS_OK(nRetVal);
}
else
{
// just reset frame ID
it->Value().nCurrFrameID = 0;
// and mark not to recreate it
nRetVal = m_ignoreNewNodes.Set(strName, it->Value());
XN_IS_STATUS_OK(nRetVal);
}
}
// if we need, recreate nodes
if (m_bNodeCollectionChanged)
{
nRetVal = SetInitialState(&state);
XN_IS_STATUS_OK(nRetVal);
}
// ResetLastTimestampAndFrame();
// m_nReferenceTimestamp = 0;
// m_nReferenceTime = 0;
m_bNodeCollectionChanged = FALSE;
m_nCurrTimestamp = 0;
return (XN_STATUS_OK);
}
XnStatus XnFileDevice::SetInputStream(void *pStreamCookie, XnPlayerInputStreamInterface *pStream)
{
XnStatus nRetVal = XN_STATUS_OK;
XN_VALIDATE_NEW(m_pInputStream, XnInputStream, pStream, pStreamCookie);
nRetVal = m_pInputStream->Init();
if (nRetVal != XN_STATUS_OK)
{
XN_DELETE(m_pInputStream);
m_pInputStream = NULL;
return (nRetVal);
}
// read format version
nRetVal = ReadFileVersion();
XN_IS_STATUS_OK(nRetVal);
m_pDataPacker = XN_NEW(XnDataPacker, m_pInputStream, XN_DEVICE_FILE_MAX_INTERNAL_BUFFER);
if (m_pDataPacker == NULL)
{
XN_DELETE(m_pInputStream);
return (XN_STATUS_ALLOC_FAILED);
}
nRetVal = m_pDataPacker->Init();
if (nRetVal != XN_STATUS_OK)
{
XN_DELETE(m_pDataPacker);
XN_DELETE(m_pInputStream);
return (nRetVal);
}
// read initial state
XN_PROPERTY_SET_CREATE_ON_STACK(props);
nRetVal = ReadInitialState(&props);
XN_IS_STATUS_OK(nRetVal);
nRetVal = SetInitialState(&props);
XN_IS_STATUS_OK(nRetVal);
// now read till first data
XnBool bWrap;
nRetVal = ReadTillNextData(&bWrap);
XN_IS_STATUS_OK(nRetVal);
return (XN_STATUS_OK);
}
XnStatus XnStreamReaderDevice::InitImpl(const XnDeviceConfig* pDeviceConfig)
{
XnStatus nRetVal = XN_STATUS_OK;
// we will init the device using state from the stream, instead of the one from user.
// the one from user will be used to set properties afterwards.
// first open the stream
nRetVal = InitPacker(pDeviceConfig->cpConnectionString);
XN_IS_STATUS_OK(nRetVal);
// create a property set
XnPropertySet* pSet;
nRetVal = XnPropertySetCreate(&pSet);
XN_IS_STATUS_OK(nRetVal);
// read initial state (we assume first object in the stream is the initial state)
nRetVal = ReadInitialState(pSet);
if (nRetVal != XN_STATUS_OK)
{
XnPropertySetDestroy(&pSet);
return (nRetVal);
}
nRetVal = SetInitialState(pDeviceConfig, pSet);
if (nRetVal != XN_STATUS_OK)
{
XnPropertySetDestroy(&pSet);
return (nRetVal);
}
// destroy the property set (we don't need it anymore)
nRetVal = XnPropertySetDestroy(&pSet);
XN_IS_STATUS_OK(nRetVal);
return (XN_STATUS_OK);
}
XnStatus XnDeviceFileReader::Rewind()
{
XnStatus nRetVal = XN_STATUS_OK;
// go back to start of stream
nRetVal = GetIOStream()->Seek(XN_DEVICE_FILE_MAGIC_LEN);
XN_IS_STATUS_OK(nRetVal);
// read initial state
XN_PROPERTY_SET_CREATE_ON_STACK(state);
nRetVal = ReadInitialState(&state);
XN_IS_STATUS_OK(nRetVal);
// first handle current streams. remove or reset them
XnDeviceModuleHolderList streams;
nRetVal = GetStreamsList(streams);
XN_IS_STATUS_OK(nRetVal);
for (XnDeviceModuleHolderList::Iterator it = streams.Begin(); it != streams.End(); ++it)
{
XnDeviceModuleHolder* pHolder = *it;
if (m_bStreamsCollectionChanged)
{
// we need to destroy all streams, and recreate them later
nRetVal = DestroyStream(pHolder->GetModule()->GetName());
XN_IS_STATUS_OK(nRetVal);
}
else
{
// just reset frame ID
XnStreamReaderStream* pStream = (XnStreamReaderStream*)pHolder->GetModule();
pStream->Reset();
}
}
// if we need, recreate streams
if (m_bStreamsCollectionChanged)
{
nRetVal = CreateStreams(&state);
XN_IS_STATUS_OK(nRetVal);
}
// now set state.
for (XnPropertySetData::Iterator it = state.pData->Begin(); it != state.pData->End(); ++it)
{
const XnChar* strName = it->Key();
XnActualPropertiesHash* pHash = it->Value();
// fix it first
if (strcmp(strName, XN_MODULE_NAME_DEVICE) == 0)
{
pHash->Remove(XN_MODULE_PROPERTY_READ_WRITE_MODE);
pHash->Remove(XN_MODULE_PROPERTY_PRIMARY_STREAM);
}
XnDeviceModule* pModule;
nRetVal = FindModule(strName, &pModule);
XN_IS_STATUS_OK(nRetVal);
nRetVal = pModule->UnsafeBatchConfig(*pHash);
XN_IS_STATUS_OK(nRetVal);
}
ResetLastTimestampAndFrame();
m_nReferenceTimestamp = 0;
m_nReferenceTime = 0;
m_bStreamsCollectionChanged = FALSE;
return (XN_STATUS_OK);
}
