XnStatus PlayerNode::OpenStream()
{
XN_VALIDATE_INPUT_PTR(m_pInputStream);
XnStatus nRetVal = m_pInputStream->Open(m_pStreamCookie);
XN_IS_STATUS_OK(nRetVal);
RecordingHeader header;
XnUInt32 nBytesRead = 0;
nRetVal = m_pInputStream->Read(m_pStreamCookie, &header, sizeof(header), &nBytesRead);
XN_IS_STATUS_OK(nRetVal);
if (nBytesRead < sizeof(header))
{
XN_LOG_ERROR_RETURN(XN_STATUS_CORRUPT_FILE, XN_MASK_OPEN_NI, "Not enough bytes read");
}
/* Check header */
if (xnOSMemCmp(header.headerMagic, DEFAULT_RECORDING_HEADER.headerMagic, sizeof(header.headerMagic)) != 0)
{
XN_LOG_ERROR_RETURN(XN_STATUS_CORRUPT_FILE, XN_MASK_OPEN_NI, "Invalid header magic");
}
if ((xnVersionCompare(&header.version, &OLDEST_SUPPORTED_FILE_FORMAT_VERSION) < 0) || //File format is too old
(xnVersionCompare(&header.version, &DEFAULT_RECORDING_HEADER.version) > 0)) //File format is too new
{
XN_LOG_ERROR_RETURN(XN_STATUS_UNSUPPORTED_VERSION, XN_MASK_OPEN_NI, "Unsupported file format version: %u.%u.%u.%u", header.version.nMajor, header.version.nMinor, header.version.nMaintenance, header.version.nBuild);
}
m_nGlobalMaxTimeStamp = header.nGlobalMaxTimeStamp;
m_nMaxNodes = header.nMaxNodeID + 1;
XN_ASSERT(m_nMaxNodes > 0);
XN_DELETE_ARR(m_pNodeInfoMap);
xnOSFree(m_aSeekTempArray);
m_pNodeInfoMap = XN_NEW_ARR(PlayerNodeInfo, m_nMaxNodes);
XN_VALIDATE_ALLOC_PTR(m_pNodeInfoMap);
XN_VALIDATE_CALLOC(m_aSeekTempArray, DataIndexEntry*, m_nMaxNodes);
m_bOpen = TRUE;
nRetVal = ProcessUntilFirstData();
if (nRetVal != XN_STATUS_OK)
{
XN_DELETE_ARR(m_pNodeInfoMap);
m_pNodeInfoMap = NULL;
xnOSFree(m_aSeekTempArray);
m_aSeekTempArray = NULL;
return nRetVal;
}
return XN_STATUS_OK;
}
XnStatus PlayerNode::Rewind()
{
//skip recording header
XnStatus nRetVal = SeekStream(XN_OS_SEEK_SET, sizeof(RecordingHeader));
XN_IS_STATUS_OK(nRetVal);
//Reset all node info's
for (XnUInt32 i = 0; i < m_nMaxNodes; i++)
{
m_pNodeInfoMap[i].Reset();
}
m_bDataBegun = FALSE;
m_nTimeStamp = 0;
m_bEOF = FALSE;
//Skip to first data
nRetVal = ProcessUntilFirstData();
XN_IS_STATUS_OK(nRetVal);
return XN_STATUS_OK;
}