Method UpdateNodeSeekInfo

Source/Modules/nimRecorder/RecorderNode.cpp:497–566

}

XnStatus RecorderNode::UpdateNodeSeekInfo(const XnChar* strNodeName, const RecordedNodeInfo& recordedNodeInfo)
{
	XnStatus nRetVal = XN_STATUS_OK;

	if (recordedNodeInfo.bGotData)
	{
		XnUInt64 nSeekTablePos = 0;

		nSeekTablePos = TellStream();

		// write seek table
		DataIndexRecordHeader seekTableHeader(m_pRecordBuffer, RECORD_MAX_SIZE, FALSE);
		seekTableHeader.SetNodeID(recordedNodeInfo.nNodeID);
		seekTableHeader.SetPayloadSize((recordedNodeInfo.nMaxFrameNum+1) * sizeof(DataIndexEntry));
		nRetVal = seekTableHeader.Encode();
		XN_IS_STATUS_OK(nRetVal);

		nRetVal = WriteRecordToStream(strNodeName, seekTableHeader);
		XN_IS_STATUS_OK(nRetVal);

		// write an empty entry for frame 0 (frames start with 1)
		DataIndexEntry* pPayload = (DataIndexEntry*)m_pPayloadData;
		xnOSMemSet(pPayload, 0, sizeof(DataIndexEntry));
		pPayload++;

		// now write the table itself
		for (DataIndexEntryList::ConstIterator it = recordedNodeInfo.dataIndex.Begin(); it != recordedNodeInfo.dataIndex.End(); ++it, ++pPayload)
		{
			*pPayload = *it;
		}
		XN_ASSERT((recordedNodeInfo.nMaxFrameNum+1) == XnUInt32(pPayload - (DataIndexEntry*)m_pPayloadData));

		nRetVal = WriteToStream(strNodeName, m_pPayloadData, (XnUInt32)((XnUInt8*)pPayload - m_pPayloadData));
		if (nRetVal != XN_STATUS_OK)
		{
			xnLogWarning(XN_MASK_OPEN_NI, "Failed to write Seek Table to file: %s", xnGetStatusString(nRetVal));
			XN_ASSERT(FALSE);
			return nRetVal;
		}

		XnUInt64 nStartPos = TellStream();

		//Seek to position of node added record
		nRetVal = SeekStream(XN_OS_SEEK_SET, recordedNodeInfo.nNodeAddedPos);
		XN_IS_STATUS_OK(nRetVal);

		// re-write this record, this time with seek data
		NodeAddedRecord record(m_pRecordBuffer, RECORD_MAX_SIZE, FALSE);
		record.SetNodeID(recordedNodeInfo.nNodeID);
		record.SetNodeName(strNodeName);
		record.SetCompression(recordedNodeInfo.compression);
		record.SetNodeType(recordedNodeInfo.type);
		record.SetNumberOfFrames(recordedNodeInfo.nMaxFrameNum);
		record.SetMinTimestamp(recordedNodeInfo.nMinTimeStamp);
		record.SetMaxTimestamp(recordedNodeInfo.nMaxTimeStamp);
		record.SetSeekTablePosition(nSeekTablePos);

		nRetVal = record.Encode();