XnStatus XnDeviceStream::Read(XnStreamData* pStreamOutput)
{
XnStatus nRetVal = XN_STATUS_OK;
// check the size of the stream output object
nRetVal = XnStreamDataCheckSize(pStreamOutput, GetRequiredDataSize());
XN_IS_STATUS_OK(nRetVal);
// first mark old data as old
pStreamOutput->bIsNew = FALSE;
// now check if we have some new data
if (m_bNewDataAvailable)
{
// copy data
nRetVal = ReadImpl(pStreamOutput);
XN_IS_STATUS_OK(nRetVal);
xnOSEnterCriticalSection(&m_hCriticalSection);
XnBool bMirror = IsMirrored();
xnOSLeaveCriticalSection(&m_hCriticalSection);
// mirror it if needed
if (bMirror)
{
nRetVal = Mirror(pStreamOutput);
XN_IS_STATUS_OK(nRetVal);
}
// mark that data is new
pStreamOutput->bIsNew = TRUE;
// and that we don't have new info
m_bNewDataAvailable = FALSE;
}
return (XN_STATUS_OK);
}
XnStatus XnStreamReaderDevice::HandleStreamData(XnStreamData* pDataProps, XnCompressionFormats nCompression, XnUInt32 nCompressedSize)
{
XnStatus nRetVal = XN_STATUS_OK;
// find the stream
XnStreamDeviceStreamHolder* pStreamHolder;
nRetVal = FindStream(pDataProps->StreamName, &pStreamHolder);
XN_IS_STATUS_OK(nRetVal);
XnStreamReaderStream* pStream = (XnStreamReaderStream*)pStreamHolder->GetStream();
XnStreamData* pStreamData = pStream->GetStreamData();
// check size
nRetVal = XnStreamDataCheckSize(pStreamData, pStream->GetRequiredDataSize());
XN_IS_STATUS_OK(nRetVal);
nRetVal = GetDataPacker()->ReadStreamData(pStreamData, pStreamHolder->GetCodec());
XN_IS_STATUS_OK(nRetVal);
pStream->NewDataAvailable(pStreamData->nTimestamp, pStreamData->nFrameID);
return (XN_STATUS_OK);
}
