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/****************************************************************************
* *
* PrimeSense Sensor 5.x Alpha *
* Copyright (C) 2011 PrimeSense Ltd. *
* *
* This file is part of PrimeSense Sensor. *
* *
* PrimeSense Sensor is free software: you can redistribute it and/or modify*
* it under the terms of the GNU Lesser General Public License as published *
* by the Free Software Foundation, either version 3 of the License, or *
* (at your option) any later version. *
* *
* PrimeSense Sensor is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public License *
* along with PrimeSense Sensor. If not, see <http://www.gnu.org/licenses/>.*
* *
****************************************************************************/
//---------------------------------------------------------------------------
// Includes
//---------------------------------------------------------------------------
#include "XnDataPacker.h"
#include <XnDDK.h>
#include <XnLog.h>
#include <XnDevice.h>
#include "XnStreamDataInternal.h"
#include "XnPropertySetInternal.h"
//---------------------------------------------------------------------------
// Defines
//---------------------------------------------------------------------------
#define XN_PACKED_STRING 1000
#define XN_PACKED_PROPERTY_SET_MODULES_END_MARKER 1001
#define XN_PACKED_PROPERTY_SET_PROPERTIES_END_MARKER 1002
//---------------------------------------------------------------------------
// Types
//---------------------------------------------------------------------------
#pragma pack (push, 1)
typedef struct XnPackedDataHeader
{
XnPackedDataType nType;
XnUInt32 nSize;
} XnPackedDataHeader;
#pragma pack (pop)
//---------------------------------------------------------------------------
// Macros
//---------------------------------------------------------------------------
#define XN_VALIDATE_OBJECT_TYPE(type) \
if (m_pCurrentHeader == NULL) \
{ \
XN_LOG_WARNING_RETURN(XN_STATUS_ERROR, XN_MASK_DDK, "Cannot read an object before a call to ReadNextObject()!"); \
} \
if (m_pCurrentHeader->nType != type) \
{ \
XN_LOG_WARNING_RETURN(XN_STATUS_ERROR, XN_MASK_DDK, "Trying to read object of type %d when stream contains object of type %d!", type, m_pCurrentHeader->nType); \
}
//---------------------------------------------------------------------------
// Code
//---------------------------------------------------------------------------
XnDataPacker::XnDataPacker(XnIOStream* pStream, XnUInt32 nInternalBufferSize) :
m_pStream(pStream),
m_nBufferSize(nInternalBufferSize),
m_nInternalBufferReadIndex(0),
m_pCurrentHeader(NULL)
{
ResetReadBuffer();
}
XnDataPacker::~XnDataPacker()
{
Free();
}
XnStatus XnDataPacker::Init()
{
XnStatus nRetVal = XN_STATUS_OK;
// we allocate enough space for the data and the header
nRetVal = m_InternalBuffer.Allocate(m_nBufferSize + sizeof(XnPackedDataHeader));
XN_IS_STATUS_OK(nRetVal);
return (XN_STATUS_OK);
}
XnStatus XnDataPacker::Free()
{
m_InternalBuffer.Free();
return (XN_STATUS_OK);
}
XnStatus XnDataPacker::WriteNewStream(const XnChar* strType, const XnChar* strName, const XnPropertySet* pPropertySet)
{
XnStatus nRetVal = XN_STATUS_OK;
StartWritingIntenalObject(XN_PACKED_NEW_STREAM);
nRetVal = WriteStringToBuffer(strType);
XN_IS_STATUS_OK(nRetVal);
nRetVal = WriteStringToBuffer(strName);
XN_IS_STATUS_OK(nRetVal);
nRetVal = WritePropertySetImpl(pPropertySet);
XN_IS_STATUS_OK(nRetVal);
nRetVal = FlushInternalBuffer();
XN_IS_STATUS_OK(nRetVal);
return (XN_STATUS_OK);
}
XnStatus XnDataPacker::ReadNewStreamName(XnChar* csType, XnChar* csName)
{
XnStatus nRetVal = XN_STATUS_OK;
XN_VALIDATE_OBJECT_TYPE(XN_PACKED_NEW_STREAM);
// keep last read index (because we only want to know the stream name, without
// actually removing anything from the buffer
XnUInt32 nReadIndexBefore = m_nInternalBufferReadIndex;
// read stream type
nRetVal = ReadStringFromBuffer(csType);
XN_IS_STATUS_OK(nRetVal);
// read stream name
nRetVal = ReadStringFromBuffer(csName);
XN_IS_STATUS_OK(nRetVal);
// restore read index
m_nInternalBufferReadIndex = nReadIndexBefore;
return (XN_STATUS_OK);
}
XnStatus XnDataPacker::ReadNewStream(XnChar* csType, XnChar* csName, XnPropertySet* pPropertySet)
{
XnStatus nRetVal = XN_STATUS_OK;
XN_VALIDATE_OBJECT_TYPE(XN_PACKED_NEW_STREAM);
nRetVal = ReadStringFromBuffer(csType);
XN_IS_STATUS_OK(nRetVal);
nRetVal = ReadStringFromBuffer(csName);
XN_IS_STATUS_OK(nRetVal);
MoveToNextObject();
nRetVal = ReadPropertySetImpl(pPropertySet);
XN_IS_STATUS_OK(nRetVal);
return (XN_STATUS_OK);
}
XnStatus XnDataPacker::WritePropertySetProperties(const XnPropertySet* pSet)
{
XnStatus nRetVal = XN_STATUS_OK;
for (XnPropertySetData::Iterator it = pSet->pData->begin(); it != pSet->pData->end(); ++it)
{
XnActualPropertiesHash* pModule = it.Value();
for (XnActualPropertiesHash::ConstIterator itProp = pModule->begin(); itProp != pModule->end(); ++itProp)
{
switch (itProp.Value()->GetType())
{
case XN_PROPERTY_TYPE_INTEGER:
{
XnActualIntProperty* pProp = (XnActualIntProperty*)itProp.Value();
nRetVal = WritePropertyImpl(pProp->GetModule(), pProp->GetName(), pProp->GetValue());
XN_IS_STATUS_OK(nRetVal);
break;
}
case XN_PROPERTY_TYPE_REAL:
{
XnActualRealProperty* pProp = (XnActualRealProperty*)itProp.Value();
nRetVal = WritePropertyImpl(pProp->GetModule(), pProp->GetName(), pProp->GetValue());
XN_IS_STATUS_OK(nRetVal);
break;
}
case XN_PROPERTY_TYPE_STRING:
{
XnActualStringProperty* pProp = (XnActualStringProperty*)itProp.Value();
nRetVal = WritePropertyImpl(pProp->GetModule(), pProp->GetName(), pProp->GetValue());
XN_IS_STATUS_OK(nRetVal);
break;
}
case XN_PROPERTY_TYPE_GENERAL:
{
XnActualGeneralProperty* pProp = (XnActualGeneralProperty*)itProp.Value();
nRetVal = WritePropertyImpl(pProp->GetModule(), pProp->GetName(), pProp->GetValue());
XN_IS_STATUS_OK(nRetVal);
break;
}
default:
XN_LOG_WARNING_RETURN(XN_STATUS_ERROR, XN_MASK_DDK, "Unknown property type: %d", itProp.Value()->GetType());
}
}
}
StartWritingIntenalObject(XN_PACKED_PROPERTY_SET_PROPERTIES_END_MARKER);
EndWritingInternalObject();
return (XN_STATUS_OK);
}
XnStatus XnDataPacker::WritePropertySetImpl(const XnPropertySet* pPropertySet)
{
XnStatus nRetVal = XN_STATUS_OK;
StartWritingIntenalObject(XN_PACKED_PROPERTY_SET);
// Write module names
for (XnPropertySetData::Iterator it = pPropertySet->pData->begin(); it != pPropertySet->pData->end(); ++it)
{
nRetVal = WriteString(it.Key());
XN_IS_STATUS_OK(nRetVal);
}
StartWritingIntenalObject(XN_PACKED_PROPERTY_SET_MODULES_END_MARKER);
EndWritingInternalObject();
// write properties
nRetVal = WritePropertySetProperties(pPropertySet);
XN_IS_STATUS_OK(nRetVal);
return (XN_STATUS_OK);
}
XnStatus XnDataPacker::WritePropertySet(const XnPropertySet* pPropertySet)
{
XnStatus nRetVal = XN_STATUS_OK;
nRetVal = WritePropertySetImpl(pPropertySet);
XN_IS_STATUS_OK(nRetVal);
nRetVal = FlushInternalBuffer();
XN_IS_STATUS_OK(nRetVal);
return (XN_STATUS_OK);
}
XnStatus XnDataPacker::ReadPropertySetImpl(XnPropertySet* pPropertySet)
{
XnStatus nRetVal = XN_STATUS_OK;
XN_VALIDATE_OBJECT_TYPE(XN_PACKED_PROPERTY_SET);
XnChar strModule[XN_DEVICE_MAX_STRING_LENGTH];
// read property set marker
MoveToNextObject();
while (m_pCurrentHeader->nType != XN_PACKED_PROPERTY_SET_MODULES_END_MARKER)
{
nRetVal = ReadString(strModule);
XN_IS_STATUS_OK(nRetVal);
nRetVal = XnPropertySetAddModule(pPropertySet, strModule);
XN_IS_STATUS_OK(nRetVal);
}
// read properties
XnChar strName[XN_DEVICE_MAX_STRING_LENGTH];
// read the modules end marker
MoveToNextObject();
while (m_pCurrentHeader->nType != XN_PACKED_PROPERTY_SET_PROPERTIES_END_MARKER)
{
// read property and add it to set
switch (m_pCurrentHeader->nType)
{
case XN_PACKED_INT_PROPERTY:
{
XnUInt64 nValue;
nRetVal = ReadPropertyImpl(strModule, strName, &nValue);
XN_IS_STATUS_OK(nRetVal);
nRetVal = XnPropertySetAddIntProperty(pPropertySet, strModule, strName, nValue);
XN_IS_STATUS_OK(nRetVal);
break;
}
case XN_PACKED_REAL_PROPERTY:
{
XnDouble dValue;
nRetVal = ReadPropertyImpl(strModule, strName, &dValue);
XN_IS_STATUS_OK(nRetVal);
nRetVal = XnPropertySetAddRealProperty(pPropertySet, strModule, strName, dValue);
XN_IS_STATUS_OK(nRetVal);
break;
}
case XN_PACKED_STRING_PROPERTY:
{
XnChar strValue[XN_DEVICE_MAX_STRING_LENGTH];
nRetVal = ReadPropertyImpl(strModule, strName, strValue);
XN_IS_STATUS_OK(nRetVal);
nRetVal = XnPropertySetAddStringProperty(pPropertySet, strModule, strName, strValue);
XN_IS_STATUS_OK(nRetVal);
break;
}
case XN_PACKED_GENERAL_PROPERTY:
{
XnGeneralBuffer gbValue;
nRetVal = ReadPropertyImpl(strModule, strName, &gbValue);
XN_IS_STATUS_OK(nRetVal);
nRetVal = XnPropertySetAddGeneralProperty(pPropertySet, strModule, strName, &gbValue);
XN_IS_STATUS_OK(nRetVal);
break;
}
default:
XN_LOG_WARNING_RETURN(XN_STATUS_ERROR, XN_MASK_DDK, "Stream contains an object of type %d in the middle of a property set!", m_pCurrentHeader->nType);
}
} // props loop
// read properties end marker
MoveToNextObject();
return (XN_STATUS_OK);
}
XnStatus XnDataPacker::ReadPropertySet(XnPropertySet* pPropertySet)
{
XnStatus nRetVal = XN_STATUS_OK;
nRetVal = ReadPropertySetImpl(pPropertySet);
XN_IS_STATUS_OK(nRetVal);
ResetReadBuffer();
return (XN_STATUS_OK);
}
XnStatus XnDataPacker::WriteStreamRemoved(const XnChar* csStreamName)
{
XnStatus nRetVal = XN_STATUS_OK;
StartWritingIntenalObject(XN_PACKED_STREAM_REMOVED);
nRetVal = WriteStringToBuffer(csStreamName);
XN_IS_STATUS_OK(nRetVal);
nRetVal = FlushInternalBuffer();
XN_IS_STATUS_OK(nRetVal);
return (XN_STATUS_OK);
}
XnStatus XnDataPacker::ReadStreamRemoved(XnChar* csStreamName)
{
XnStatus nRetVal = XN_STATUS_OK;
XN_VALIDATE_OBJECT_TYPE(XN_PACKED_STREAM_REMOVED);
nRetVal = ReadStringFromBuffer(csStreamName);
XN_IS_STATUS_OK(nRetVal);
ResetReadBuffer();
return (XN_STATUS_OK);
}
XnStatus XnDataPacker::WritePropertyImpl(const XnChar* csModule, const XnChar* csProp, XnUInt64 nValue)
{
XnStatus nRetVal = XN_STATUS_OK;
StartWritingIntenalObject(XN_PACKED_INT_PROPERTY);
nRetVal = WriteStringToBuffer(csModule);
XN_IS_STATUS_OK(nRetVal);
nRetVal = WriteStringToBuffer(csProp);
XN_IS_STATUS_OK(nRetVal);
nRetVal = m_InternalBuffer.Write((const XnUChar*)&nValue, sizeof(XnUInt64));
XN_IS_STATUS_OK(nRetVal);
EndWritingInternalObject();
return (XN_STATUS_OK);
}
XnStatus XnDataPacker::WriteProperty(const XnChar* csModule, const XnChar* csProp, XnUInt64 nValue)
{
XnStatus nRetVal = XN_STATUS_OK;
nRetVal = WritePropertyImpl(csModule, csProp, nValue);
XN_IS_STATUS_OK(nRetVal);
nRetVal = FlushInternalBuffer();
XN_IS_STATUS_OK(nRetVal);
return (XN_STATUS_OK);
}
XnStatus XnDataPacker::ReadPropertyImpl(XnChar* pcsModule, XnChar* pcsProp, XnUInt64* pnValue)
{
XnStatus nRetVal = XN_STATUS_OK;
XN_VALIDATE_OBJECT_TYPE(XN_PACKED_INT_PROPERTY);
nRetVal = ReadStringFromBuffer(pcsModule);
XN_IS_STATUS_OK(nRetVal);
nRetVal = ReadStringFromBuffer(pcsProp);
XN_IS_STATUS_OK(nRetVal);
nRetVal = ReadInternalBuffer((XnUChar*)pnValue, sizeof(XnUInt64));
XN_IS_STATUS_OK(nRetVal);
MoveToNextObject();
return (XN_STATUS_OK);
}
XnStatus XnDataPacker::ReadProperty(XnChar* pcsModule, XnChar* pcsProp, XnUInt64* pnValue)
{
XnStatus nRetVal = XN_STATUS_OK;
nRetVal = ReadPropertyImpl(pcsModule, pcsProp, pnValue);
XN_IS_STATUS_OK(nRetVal);
ResetReadBuffer();
return (XN_STATUS_OK);
}
XnStatus XnDataPacker::WritePropertyImpl(const XnChar* csModule, const XnChar* csProp, XnDouble dValue)
{
XnStatus nRetVal = XN_STATUS_OK;
StartWritingIntenalObject(XN_PACKED_REAL_PROPERTY);
nRetVal = WriteStringToBuffer(csModule);
XN_IS_STATUS_OK(nRetVal);
nRetVal = WriteStringToBuffer(csProp);
XN_IS_STATUS_OK(nRetVal);
nRetVal = m_InternalBuffer.Write((const XnUChar*)&dValue, sizeof(XnDouble));
XN_IS_STATUS_OK(nRetVal);
EndWritingInternalObject();
return (XN_STATUS_OK);
}
XnStatus XnDataPacker::WriteProperty(const XnChar* csModule, const XnChar* csProp, XnDouble dValue)
{
XnStatus nRetVal = XN_STATUS_OK;
nRetVal = WritePropertyImpl(csModule, csProp, dValue);
XN_IS_STATUS_OK(nRetVal);
nRetVal = FlushInternalBuffer();
XN_IS_STATUS_OK(nRetVal);
return (XN_STATUS_OK);
}
XnStatus XnDataPacker::ReadPropertyImpl(XnChar* pcsModule, XnChar* pcsProp, XnDouble* pdValue)
{
XnStatus nRetVal = XN_STATUS_OK;
XN_VALIDATE_OBJECT_TYPE(XN_PACKED_REAL_PROPERTY);
nRetVal = ReadStringFromBuffer(pcsModule);
XN_IS_STATUS_OK(nRetVal);
nRetVal = ReadStringFromBuffer(pcsProp);
XN_IS_STATUS_OK(nRetVal);
nRetVal = ReadInternalBuffer((XnUChar*)pdValue, sizeof(XnDouble));
XN_IS_STATUS_OK(nRetVal);
MoveToNextObject();
return (XN_STATUS_OK);
}
XnStatus XnDataPacker::ReadProperty(XnChar* pcsModule, XnChar* pcsProp, XnDouble* pdValue)
{
XnStatus nRetVal = XN_STATUS_OK;
nRetVal = ReadPropertyImpl(pcsModule, pcsProp, pdValue);
XN_IS_STATUS_OK(nRetVal);
ResetReadBuffer();
return (XN_STATUS_OK);
}
XnStatus XnDataPacker::WritePropertyImpl(const XnChar* csModule, const XnChar* csProp, const XnChar* csValue)
{
XnStatus nRetVal = XN_STATUS_OK;
StartWritingIntenalObject(XN_PACKED_STRING_PROPERTY);
nRetVal = WriteStringToBuffer(csModule);
XN_IS_STATUS_OK(nRetVal);
nRetVal = WriteStringToBuffer(csProp);
XN_IS_STATUS_OK(nRetVal);
nRetVal = WriteStringToBuffer(csValue);
XN_IS_STATUS_OK(nRetVal);
EndWritingInternalObject();
return (XN_STATUS_OK);
}
XnStatus XnDataPacker::WriteProperty(const XnChar* csModule, const XnChar* csProp, const XnChar* csValue)
{
XnStatus nRetVal = XN_STATUS_OK;
nRetVal = WritePropertyImpl(csModule, csProp, csValue);
XN_IS_STATUS_OK(nRetVal);
nRetVal = FlushInternalBuffer();
XN_IS_STATUS_OK(nRetVal);
return (XN_STATUS_OK);
}
XnStatus XnDataPacker::ReadPropertyImpl(XnChar* pcsModule, XnChar* pcsProp, XnChar* pcsValue)
{
XnStatus nRetVal = XN_STATUS_OK;
XN_VALIDATE_OBJECT_TYPE(XN_PACKED_STRING_PROPERTY);
nRetVal = ReadStringFromBuffer(pcsModule);
XN_IS_STATUS_OK(nRetVal);
nRetVal = ReadStringFromBuffer(pcsProp);
XN_IS_STATUS_OK(nRetVal);
nRetVal = ReadStringFromBuffer(pcsValue);
XN_IS_STATUS_OK(nRetVal);
MoveToNextObject();
return (XN_STATUS_OK);
}
XnStatus XnDataPacker::ReadProperty(XnChar* pcsModule, XnChar* pcsProp, XnChar* pcsValue)
{
XnStatus nRetVal = XN_STATUS_OK;
nRetVal = ReadPropertyImpl(pcsModule, pcsProp, pcsValue);
XN_IS_STATUS_OK(nRetVal);
ResetReadBuffer();
return (XN_STATUS_OK);
}
XnStatus XnDataPacker::WritePropertyImpl(const XnChar* csModule, const XnChar* csProp, XnGeneralBuffer gbValue)
{
XnStatus nRetVal = XN_STATUS_OK;
StartWritingIntenalObject(XN_PACKED_GENERAL_PROPERTY);
nRetVal = WriteStringToBuffer(csModule);
XN_IS_STATUS_OK(nRetVal);
nRetVal = WriteStringToBuffer(csProp);
XN_IS_STATUS_OK(nRetVal);
// write buffer size
nRetVal = m_InternalBuffer.Write((const XnUChar*)&gbValue.nDataSize, sizeof(XnUInt32));
XN_IS_STATUS_OK(nRetVal);
// write buffer
nRetVal = m_InternalBuffer.Write((const XnUChar*)gbValue.pData, gbValue.nDataSize);
XN_IS_STATUS_OK(nRetVal);
EndWritingInternalObject();
return (XN_STATUS_OK);
}
XnStatus XnDataPacker::WriteProperty(const XnChar* csModule, const XnChar* csProp, XnGeneralBuffer gbValue)
{
XnStatus nRetVal = XN_STATUS_OK;
nRetVal = WritePropertyImpl(csModule, csProp, gbValue);
XN_IS_STATUS_OK(nRetVal);
nRetVal = FlushInternalBuffer();
XN_IS_STATUS_OK(nRetVal);
return (XN_STATUS_OK);
}
XnStatus XnDataPacker::ReadPropertyImpl(XnChar* pcsModule, XnChar* pcsProp, XnGeneralBuffer* pgbValue)
{
XnStatus nRetVal = XN_STATUS_OK;
XN_VALIDATE_OBJECT_TYPE(XN_PACKED_GENERAL_PROPERTY);
nRetVal = ReadStringFromBuffer(pcsModule);
XN_IS_STATUS_OK(nRetVal);
nRetVal = ReadStringFromBuffer(pcsProp);
XN_IS_STATUS_OK(nRetVal);
// convert data into general buffer form
XnGeneralBuffer gb;
nRetVal = ReadInternalBuffer((XnUChar*)&gb.nDataSize, sizeof(XnUInt32));
XN_IS_STATUS_OK(nRetVal);
gb.pData = (void*)(m_InternalBuffer.GetData() + m_nInternalBufferReadIndex);
m_nInternalBufferReadIndex += gb.nDataSize;
*pgbValue = gb;
MoveToNextObject();
return (XN_STATUS_OK);
}
XnStatus XnDataPacker::ReadProperty(XnChar* pcsModule, XnChar* pcsProp, XnGeneralBuffer* pgbValue)
{
XnStatus nRetVal = XN_STATUS_OK;
nRetVal = ReadPropertyImpl(pcsModule, pcsProp, pgbValue);
XN_IS_STATUS_OK(nRetVal);
ResetReadBuffer();
return (XN_STATUS_OK);
}
XnStatus XnDataPacker::WriteStreamData(const XnStreamData* pStreamOutput, XnCodec* pCodec)
{
XnStatus nRetVal = XN_STATUS_OK;
StartWritingIntenalObject(XN_PACKED_STREAM_DATA);
// write stream name
nRetVal = WriteStringToBuffer(pStreamOutput->StreamName);
XN_IS_STATUS_OK(nRetVal);
// write timestamp
nRetVal = m_InternalBuffer.Write((const XnUChar*)&pStreamOutput->nTimestamp, sizeof(XnUInt64));
XN_IS_STATUS_OK(nRetVal);
// write frame-id
nRetVal = m_InternalBuffer.Write((const XnUChar*)&pStreamOutput->nFrameID, sizeof(XnUInt32));
XN_IS_STATUS_OK(nRetVal);
// write compression format
XnCompressionFormats nFormat = pCodec->GetCompressionFormat();
nRetVal = m_InternalBuffer.Write((const XnUChar*)&nFormat, sizeof(XnUInt32));
XN_IS_STATUS_OK(nRetVal);
// write original data size
nRetVal = m_InternalBuffer.Write((const XnUChar*)&pStreamOutput->nDataSize, sizeof(XnUInt32));
XN_IS_STATUS_OK(nRetVal);
// leave space for compressed data size
XnUInt32* pnCompressedDataSize = (XnUInt32*)m_InternalBuffer.GetUnsafeWritePointer();
*pnCompressedDataSize = m_InternalBuffer.GetFreeSpaceInBuffer();
m_InternalBuffer.UnsafeUpdateSize(sizeof(XnUInt32));
// compress data
nRetVal = pCodec->Compress((const XnUChar*)pStreamOutput->pData, pStreamOutput->nDataSize, m_InternalBuffer.GetUnsafeWritePointer(), pnCompressedDataSize);
XN_IS_STATUS_OK(nRetVal);
// update size (add compressed data)
m_InternalBuffer.UnsafeUpdateSize(*pnCompressedDataSize);
EndWritingInternalObject();
nRetVal = FlushInternalBuffer();
XN_IS_STATUS_OK(nRetVal);
return (XN_STATUS_OK);
}
XnStatus XnDataPacker::ReadStreamDataProps(XnStreamData* pStreamOutput, XnCompressionFormats* pnCompression, XnUInt32* pnCompressedSize)
{
XnStatus nRetVal = XN_STATUS_OK;
XN_VALIDATE_OBJECT_TYPE(XN_PACKED_STREAM_DATA);
// keep last read index (because we only want to know the stream name, without
// actually removing anything from the buffer
XnUInt32 nReadIndexBefore = m_nInternalBufferReadIndex;
// read stream name
nRetVal = ReadStringFromBuffer(pStreamOutput->StreamName);
XN_IS_STATUS_OK(nRetVal);
// read timestamp
nRetVal = ReadInternalBuffer((XnUChar*)&pStreamOutput->nTimestamp, sizeof(XnUInt64));
XN_IS_STATUS_OK(nRetVal);
// read frame-id
nRetVal = ReadInternalBuffer((XnUChar*)&pStreamOutput->nFrameID, sizeof(XnUInt32));
XN_IS_STATUS_OK(nRetVal);
// read compression format
nRetVal = ReadInternalBuffer((XnUChar*)pnCompression, sizeof(XnCompressionFormats));
XN_IS_STATUS_OK(nRetVal);
// read data size
nRetVal = ReadInternalBuffer((XnUChar*)&pStreamOutput->nDataSize, sizeof(XnUInt32));
XN_IS_STATUS_OK(nRetVal);
// read compressed data size
nRetVal = ReadInternalBuffer((XnUChar*)pnCompressedSize, sizeof(XnUInt32));
XN_IS_STATUS_OK(nRetVal);
// restore read index
m_nInternalBufferReadIndex = nReadIndexBefore;
return (XN_STATUS_OK);
}
XnStatus XnDataPacker::ReadStreamData(XnStreamData* pStreamOutput, XnCodec* pCodec)
{
XnStatus nRetVal = XN_STATUS_OK;
XN_VALIDATE_OBJECT_TYPE(XN_PACKED_STREAM_DATA);
// read stream name
nRetVal = ReadStringFromBuffer(pStreamOutput->StreamName);
XN_IS_STATUS_OK(nRetVal);
// read timestamp
nRetVal = ReadInternalBuffer((XnUChar*)&pStreamOutput->nTimestamp, sizeof(XnUInt64));
XN_IS_STATUS_OK(nRetVal);
// read frame-id
nRetVal = ReadInternalBuffer((XnUChar*)&pStreamOutput->nFrameID, sizeof(XnUInt32));
XN_IS_STATUS_OK(nRetVal);
// read compression format
XnCompressionFormats nFormat;
nRetVal = ReadInternalBuffer((XnUChar*)&nFormat, sizeof(XnCompressionFormats));
XN_IS_STATUS_OK(nRetVal);
if (nFormat != pCodec->GetCompressionFormat())
{
XN_LOG_WARNING_RETURN(XN_STATUS_ERROR, XN_MASK_DDK, "Data in stream is packed with another codec than the one provided!");
}
// read original data size
XnUInt32 nDataSize;
nRetVal = ReadInternalBuffer((XnUChar*)&nDataSize, sizeof(XnUInt32));
XN_IS_STATUS_OK(nRetVal);
if (pStreamOutput->pInternal->bAllocated && pStreamOutput->pInternal->nAllocSize < nDataSize)
{
return XN_STATUS_OUTPUT_BUFFER_OVERFLOW;
}
pStreamOutput->nDataSize = nDataSize;
// read compressed data size
XnUInt32 nCompressedDataSize;
nRetVal = ReadInternalBuffer((XnUChar*)&nCompressedDataSize, sizeof(XnUInt32));
XN_IS_STATUS_OK(nRetVal);
// decompress
nRetVal = pCodec->Decompress(m_InternalBuffer.GetData() + m_nInternalBufferReadIndex, nCompressedDataSize, (XnUChar*)pStreamOutput->pData, &pStreamOutput->nDataSize);
XN_IS_STATUS_OK(nRetVal);
ResetReadBuffer();
return (XN_STATUS_OK);
}
XnStatus XnDataPacker::WriteCustomData(XnUInt32 nObjectType, const void* pData, XnUInt32 nDataSize)
{
XnStatus nRetVal = XN_STATUS_OK;
StartWritingIntenalObject((XnPackedDataType)nObjectType);
// write buffer size
nRetVal = m_InternalBuffer.Write((const XnUChar*)&nDataSize, sizeof(XnUInt32));
XN_IS_STATUS_OK(nRetVal);
// write buffer
nRetVal = m_InternalBuffer.Write((const XnUChar*)pData, nDataSize);
XN_IS_STATUS_OK(nRetVal);
EndWritingInternalObject();
nRetVal = FlushInternalBuffer();
XN_IS_STATUS_OK(nRetVal);
return (XN_STATUS_OK);
}
XnStatus XnDataPacker::ReadCustomData(XnUInt32 nObjectType, void* pData, XnUInt32* pnDataSize)
{
XnStatus nRetVal = XN_STATUS_OK;
XN_VALIDATE_OBJECT_TYPE(nObjectType);
// read buffer size
XnUInt32 nSize = 0;
nRetVal = ReadInternalBuffer((XnUChar*)&nSize, sizeof(XnUInt32));
XN_IS_STATUS_OK(nRetVal);
if (nSize > *pnDataSize)
{
return XN_STATUS_OUTPUT_BUFFER_OVERFLOW;
}
nRetVal = ReadInternalBuffer((XnUChar*)pData, nSize);
XN_IS_STATUS_OK(nRetVal);
*pnDataSize = nSize;
ResetReadBuffer();
return (XN_STATUS_OK);
}
XnStatus XnDataPacker::WriteEnd()
{
XnStatus nRetVal = XN_STATUS_OK;
StartWritingIntenalObject(XN_PACKED_END);
EndWritingInternalObject();
nRetVal = FlushInternalBuffer();
XN_IS_STATUS_OK(nRetVal);
return (XN_STATUS_OK);
}
XnStatus XnDataPacker::WriteString(const XnChar* strString)
{
XnStatus nRetVal = XN_STATUS_OK;
StartWritingIntenalObject((XnPackedDataType)XN_PACKED_STRING);
nRetVal = WriteStringToBuffer(strString);
XN_IS_STATUS_OK(nRetVal);
EndWritingInternalObject();
return (XN_STATUS_OK);
}
XnStatus XnDataPacker::ReadString(XnChar* pcsString)
{
XnStatus nRetVal = XN_STATUS_OK;
XN_VALIDATE_OBJECT_TYPE(XN_PACKED_STRING);
nRetVal = ReadStringFromBuffer(pcsString);
XN_IS_STATUS_OK(nRetVal);
MoveToNextObject();
return (XN_STATUS_OK);
}
XnStatus XnDataPacker::FixReadBCObjects()
{
XnStatus nRetVal = XN_STATUS_OK;
// keep a pointer to current header (it might change if we read additional objects)
XnPackedDataHeader* pHeader = m_pCurrentHeader;
XnUInt32 nStartReadIndex = m_nInternalBufferReadIndex;
switch (m_pCurrentHeader->nType)
{
case XN_PACKED_PROPERTY_SET:
{
// check if this is the old version (with size 0)
if (m_nInternalBufferReadIndex != m_InternalBuffer.GetSize())
{
return (XN_STATUS_OK);
}
// It is old version. Fix it.
// read all module names (+ modules end marker)
for (;;)
{
nRetVal = ReadNextObjectImpl();
XN_IS_STATUS_OK(nRetVal);
if (m_pCurrentHeader->nType == XN_PACKED_PROPERTY_SET_MODULES_END_MARKER)
{
break;
}
// make sure this is a string
XN_VALIDATE_OBJECT_TYPE(XN_PACKED_STRING);
}
// read properties (+ properties end marker)
for (;;)
{
nRetVal = ReadNextObjectImpl();
XN_IS_STATUS_OK(nRetVal);
if (m_pCurrentHeader->nType == XN_PACKED_PROPERTY_SET_PROPERTIES_END_MARKER)
{
break;
}
// make sure this is a property
if (m_pCurrentHeader->nType != XN_PACKED_INT_PROPERTY &&
m_pCurrentHeader->nType != XN_PACKED_REAL_PROPERTY &&
m_pCurrentHeader->nType != XN_PACKED_STRING_PROPERTY &&
m_pCurrentHeader->nType != XN_PACKED_GENERAL_PROPERTY)
{
XN_LOG_WARNING_RETURN(XN_STATUS_ERROR, XN_MASK_DDK, "Trying to read object of type property when stream contains object of type %d!", m_pCurrentHeader->nType);
}
}
break;
}
case XN_PACKED_NEW_STREAM:
{
// check if this is old version (bad size). Read both strings
XnChar strTemp[XN_DEVICE_MAX_STRING_LENGTH];
nRetVal = ReadStringFromBuffer(strTemp);
XN_IS_STATUS_OK(nRetVal);
nRetVal = ReadStringFromBuffer(strTemp);
XN_IS_STATUS_OK(nRetVal);
if (m_nInternalBufferReadIndex != m_InternalBuffer.GetSize())
{
m_nInternalBufferReadIndex = nStartReadIndex;
return (XN_STATUS_OK);
}
// read next object
nRetVal = ReadNextObjectImpl();
XN_IS_STATUS_OK(nRetVal);
// make sure this is a property set
XN_VALIDATE_OBJECT_TYPE(XN_PACKED_PROPERTY_SET);
break;
}
default:
// other objects are not BC
return (XN_STATUS_OK);
}
// move back to start
m_nInternalBufferReadIndex = nStartReadIndex;
// update size accordingly
pHeader->nSize = (XnUInt32)(m_InternalBuffer.GetUnsafeWritePointer() - (XnUChar*)pHeader - sizeof(XnPackedDataHeader));
// now place header back at root object
m_pCurrentHeader = pHeader;
return (XN_STATUS_OK);
}
XnStatus XnDataPacker::ReadNextObjectImpl()
{
XnStatus nRetVal = XN_STATUS_OK;
// read header
m_pCurrentHeader = (XnPackedDataHeader*)m_InternalBuffer.GetUnsafeWritePointer();
nRetVal = m_pStream->ReadData((XnUChar*)m_pCurrentHeader, sizeof(XnPackedDataHeader));
XN_IS_STATUS_OK(nRetVal);
m_InternalBuffer.UnsafeUpdateSize(sizeof(XnPackedDataHeader));
m_nInternalBufferReadIndex += sizeof(XnPackedDataHeader);
// check size
if (m_InternalBuffer.GetFreeSpaceInBuffer() < m_pCurrentHeader->nSize)
{
return (XN_STATUS_INTERNAL_BUFFER_TOO_SMALL);
}
// read data
nRetVal = m_pStream->ReadData(m_InternalBuffer.GetUnsafeWritePointer(), m_pCurrentHeader->nSize);
XN_IS_STATUS_OK(nRetVal);
m_InternalBuffer.UnsafeUpdateSize(m_pCurrentHeader->nSize);
// fix BC objects
nRetVal = FixReadBCObjects();
XN_IS_STATUS_OK(nRetVal);
return (XN_STATUS_OK);
}
XnStatus XnDataPacker::ReadNextObject(XnPackedDataType* pType)
{
XnStatus nRetVal = XN_STATUS_OK;
ResetReadBuffer();
nRetVal = ReadNextObjectImpl();
XN_IS_STATUS_OK(nRetVal);
*pType = m_pCurrentHeader->nType;
return (XN_STATUS_OK);
}
XnStatus XnDataPacker::ReadInternalBuffer(XnUChar* pData, XnUInt32 nDataSize)
{
if ((m_InternalBuffer.GetSize() - m_nInternalBufferReadIndex) < nDataSize)
return XN_STATUS_INTERNAL_BUFFER_TOO_SMALL;
// read
xnOSMemCopy(pData, m_InternalBuffer.GetData() + m_nInternalBufferReadIndex, nDataSize);
// update read index
m_nInternalBufferReadIndex += nDataSize;
return (XN_STATUS_OK);
}
XnStatus XnDataPacker::WriteStringToBuffer(const XnChar* csString)
{
XnStatus nRetVal = XN_STATUS_OK;
// get length (including null termination)
XnUInt32 nLength = (XnUInt32)strlen(csString) + 1;
if (nLength >= XN_DEVICE_MAX_STRING_LENGTH)
return (XN_STATUS_INTERNAL_BUFFER_TOO_SMALL);
// write length
nRetVal = m_InternalBuffer.Write((const XnUChar*)&nLength, sizeof(XnUInt32));
XN_IS_STATUS_OK(nRetVal);
// write string
nRetVal = m_InternalBuffer.Write((const XnUChar*)csString, nLength);
XN_IS_STATUS_OK(nRetVal);
return (XN_STATUS_OK);
}
XnStatus XnDataPacker::ReadStringFromBuffer(XnChar* pcsString)
{
XnStatus nRetVal = XN_STATUS_OK;
// read length
XnUInt32 nLength;
nRetVal = ReadInternalBuffer((XnUChar*)&nLength, sizeof(XnUInt32));
XN_IS_STATUS_OK(nRetVal);
//read string
nRetVal = ReadInternalBuffer((XnUChar*)pcsString, nLength);
XN_IS_STATUS_OK(nRetVal);
// null terminate the string
pcsString[nLength] = '\0';
return (XN_STATUS_OK);
}
void XnDataPacker::StartWritingIntenalObject(XnUInt32 nType)
{
m_pCurrentHeader = (XnPackedDataHeader*)m_InternalBuffer.GetUnsafeWritePointer();
m_InternalBuffer.UnsafeUpdateSize(sizeof(XnPackedDataHeader));
m_pCurrentHeader->nType = (XnPackedDataType)nType;
m_pCurrentHeader->nSize = 0;
}
void XnDataPacker::EndWritingInternalObject()
{
m_pCurrentHeader->nSize = (XnUInt32)(m_InternalBuffer.GetUnsafeWritePointer() - (XnUChar*)m_pCurrentHeader - sizeof(XnPackedDataHeader));
}
XnStatus XnDataPacker::FlushInternalBuffer()
{
XnStatus nRetVal = XN_STATUS_OK;
// make sure root header contains entire size (without the header itself)
XnPackedDataHeader* pHeader = (XnPackedDataHeader*)m_InternalBuffer.GetData();
pHeader->nSize = m_InternalBuffer.GetSize() - sizeof(XnPackedDataHeader);
nRetVal = m_pStream->WriteData(m_InternalBuffer.GetData(), m_InternalBuffer.GetSize());
XN_IS_STATUS_OK(nRetVal);
// reset buffer
m_InternalBuffer.Reset();
return (XN_STATUS_OK);
}
void XnDataPacker::MoveToNextObject()
{
m_pCurrentHeader = (XnPackedDataHeader*)(m_InternalBuffer.GetData() + m_nInternalBufferReadIndex);
m_nInternalBufferReadIndex += sizeof(XnPackedDataHeader);
}
void XnDataPacker::ResetReadBuffer()
{
m_InternalBuffer.Reset();
m_pCurrentHeader = NULL;
m_nInternalBufferReadIndex = 0;
}
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