XnStatus PlayerNode::UndoRecord(PlayerNode::RecordUndoInfo& undoInfo, XnUInt32 nDestPos, XnBool& bUndone)
{
XnStatus nRetVal = XN_STATUS_OK;
XnUInt32 nOriginalPos = TellStream();
bUndone = FALSE;
Record record(m_pRecordBuffer, RECORD_MAX_SIZE);
while ((undoInfo.nRecordPos > nDestPos) && (undoInfo.nUndoRecordPos != 0))
{
nRetVal = SeekStream(XN_OS_SEEK_SET, undoInfo.nUndoRecordPos);
XN_IS_STATUS_OK(nRetVal);
nRetVal = ReadRecordHeader(record);
XN_IS_STATUS_OK(nRetVal);
undoInfo.nRecordPos = undoInfo.nUndoRecordPos;
undoInfo.nUndoRecordPos = record.GetUndoRecordPos();
}
if (undoInfo.nRecordPos <= nDestPos)
{
/*We found a record that can undo the record originally pointed to by undoInfo.nDestRecordPos,
so now we handle it. */
nRetVal = ReadRecordFields(record);
XN_IS_STATUS_OK(nRetVal);
nRetVal = HandleRecord(record, FALSE);
XN_IS_STATUS_OK(nRetVal);
bUndone = TRUE;
}
else
{
nRetVal = SeekStream(XN_OS_SEEK_SET, nOriginalPos);
XN_IS_STATUS_OK(nRetVal);
}
return XN_STATUS_OK;
}
XnStatus PlayerNode::ReadRecord(Record &record)
{
XnStatus nRetVal = ReadRecordHeader(record);
XN_IS_STATUS_OK(nRetVal);
nRetVal = ReadRecordFields(record);
XN_IS_STATUS_OK(nRetVal);
return XN_STATUS_OK;
}
RecordTypeIR
JsonIRReader::RecordTypeJsonToIR(const JsonObjectRef &record_type) {
RecordTypeIR record_type_ir;
ReadTypeInfo(record_type, &record_type_ir);
ReadTemplateInfo(record_type, &record_type_ir);
record_type_ir.SetAccess(GetAccess(record_type));
ReadVTableLayout(record_type, &record_type_ir);
ReadRecordFields(record_type, &record_type_ir);
ReadBaseSpecifiers(record_type, &record_type_ir);
record_type_ir.SetRecordKind(GetRecordKind(record_type));
record_type_ir.SetAnonymity(record_type.GetBool("is_anonymous"));
ReadTagTypeInfo(record_type, &record_type_ir);
return record_type_ir;
}
XnStatus PlayerNode::SeekToFrameAbsolute(XnUInt32 nNodeID, XnUInt32 nDestFrame)
{
XN_ASSERT((nNodeID != INVALID_NODE_ID) && (nNodeID < m_nMaxNodes));
PlayerNodeInfo* pPlayerNodeInfo = &m_pNodeInfoMap[nNodeID];
XN_ASSERT((nDestFrame > 0) && (nDestFrame <= pPlayerNodeInfo->nFrames));
XN_VALIDATE_INPUT_PTR(m_pNodeNotifications);
XnUInt32 nStartPos = TellStream();
XnUInt32 nNextFrame = pPlayerNodeInfo->nCurFrame + 1;
XnUInt32 nFrames = pPlayerNodeInfo->nFrames;
XnStatus nRetVal = XN_STATUS_OK;
if (nDestFrame == pPlayerNodeInfo->nCurFrame)
{
//Just go back to position of current frame
nRetVal = SeekStream(XN_OS_SEEK_SET, pPlayerNodeInfo->nLastDataPos);
XN_IS_STATUS_OK(nRetVal);
}
else if (nDestFrame < nNextFrame)
{
//Seek backwards
XnUInt32 nDestRecordPos = pPlayerNodeInfo->newDataUndoInfo.nRecordPos;
XnUInt32 nUndoRecordPos = pPlayerNodeInfo->newDataUndoInfo.nUndoRecordPos;
NewDataRecordHeader record(m_pRecordBuffer, RECORD_MAX_SIZE);
/*Scan back through the frames' undo positions until we get to a frame number that is smaller or equal
to nDestFrame. We put the position of the frame we find in nDestRecordPos. */
do
{
if (nUndoRecordPos == 0)
{
/* The last frame we encountered doesn't have an undo frame. But this data frame can't be the first,
so the file is corrupt */
XN_LOG_ERROR_RETURN(XN_STATUS_CORRUPT_FILE, XN_MASK_OPEN_NI, "Undo frame not found for frame in position %u", nDestRecordPos);
}
nRetVal = SeekStream(XN_OS_SEEK_SET, nUndoRecordPos);
XN_IS_STATUS_OK(nRetVal);
nDestRecordPos = nUndoRecordPos;
record.ResetRead();
nRetVal = ReadRecordHeader(record);
XN_IS_STATUS_OK(nRetVal);
if (record.GetType() != RECORD_NEW_DATA)
{
XN_ASSERT(FALSE);
XN_LOG_ERROR_RETURN(XN_STATUS_CORRUPT_FILE, XN_MASK_OPEN_NI, "Unexpected record type: %u", record.GetType());
}
if (record.GetNodeID() != nNodeID)
{
XN_ASSERT(FALSE);
XN_LOG_ERROR_RETURN(XN_STATUS_CORRUPT_FILE, XN_MASK_OPEN_NI, "Unexpected node id: %u", record.GetNodeID());
}
nRetVal = ReadRecordFields(record);
XN_IS_STATUS_OK(nRetVal);
nRetVal = record.Decode();
XN_IS_STATUS_OK(nRetVal);
nUndoRecordPos = record.GetUndoRecordPos();
} while (record.GetFrameNumber() > nDestFrame);
//Now handle the frame
nRetVal = HandleNewDataRecord(record, FALSE);
XnBool bUndone = FALSE;
for (XnUInt32 i = 0; i < m_nMaxNodes; i++)
{
//Rollback all properties to match the state the stream was in at position nDestRecordPos
PlayerNodeInfo &pni = m_pNodeInfoMap[i];
for (RecordUndoInfoMap::Iterator it = pni.recordUndoInfoMap.begin();
it != pni.recordUndoInfoMap.end(); it++)
{
if ((it.Value().nRecordPos > nDestRecordPos) && (it.Value().nRecordPos < nStartPos))
{
//This property was set between nDestRecordPos and our start position, so we need to undo it.
nRetVal = UndoRecord(it.Value(), nDestRecordPos, bUndone);
XN_IS_STATUS_OK(nRetVal);
}
}
if ((i != nNodeID) && pni.bIsGenerator)
{
//Undo all other generator nodes' data
RecordUndoInfo &undoInfo = pni.newDataUndoInfo;
if ((undoInfo.nRecordPos > nDestRecordPos) && (undoInfo.nRecordPos < nStartPos))
{
nRetVal = UndoRecord(undoInfo, nDestRecordPos, bUndone);
XN_IS_STATUS_OK(nRetVal);
if (!bUndone)
{
//We couldn't find a record that can undo this data record
pni.nLastDataPos = 0;
pni.newDataUndoInfo.Reset();
}
}
}
}
/*Now, for each node, go to the position of the last encountered data record, and process that record
(including its payload).*/
/*TODO: Optimization: remember each node's last data pos, and later, see if it changes. Only process data
frames of nodes whose last data pos actually changed.*/
nRetVal = ProcessEachNodeLastData(nNodeID);
XN_IS_STATUS_OK(nRetVal);
}
else //(nDestFrame >= nNextFrame)
{
//Skip all frames until we get to our frame number, but handle any properties we run into.
while (pPlayerNodeInfo->nCurFrame < nDestFrame)
{
nRetVal = ProcessRecord(FALSE);
XN_IS_STATUS_OK(nRetVal);
}
/*Now, for each node, go to the position of the last encountered data record, and process that record
(including its payload).*/
/*TODO: Optimization: remember each node's last data pos, and later, see if it changes. Only process data
frames of nodes whose last data pos actually changed.*/
nRetVal = ProcessEachNodeLastData(nNodeID);
XN_IS_STATUS_OK(nRetVal);
}
return XN_STATUS_OK;
}