/usr/include/ni/XnFPSCalculator.h is in libopenni-dev 1.5.4.0-8.
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* *
* OpenNI 1.x Alpha *
* Copyright (C) 2011 PrimeSense Ltd. *
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* This file is part of OpenNI. *
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* *
* You should have received a copy of the GNU Lesser General Public License *
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****************************************************************************/
#ifndef __XN_FPS_CALCULATOR_H__
#define __XN_FPS_CALCULATOR_H__
//---------------------------------------------------------------------------
// Includes
//---------------------------------------------------------------------------
#include <XnPlatform.h>
#include <XnStatus.h>
//---------------------------------------------------------------------------
// Types
//---------------------------------------------------------------------------
struct XnFPSDataImpl;
typedef struct XnFPSDataImpl* XnFPSData;
//---------------------------------------------------------------------------
// Exported Functions
//---------------------------------------------------------------------------
/**
* This function initializes the FPS calculator.
*
* @param pFPS [in] A pointer to an XnFPSData struct.
* @param nSamplesCount [in] The number of last frames to be kept.
*/
XN_C_API XnStatus XN_C_DECL xnFPSInit(XnFPSData* pFPS, XnUInt32 nSamplesCount);
/**
* This function marks that another frame was processed.
*
* @param pFPS [in] A pointer to an XnFPSData struct.
* @param nNow [in] Optional. Current time. When not provided, function will take it itself.
*/
XN_C_API XnStatus XN_C_DECL xnFPSMarkFrame(XnFPSData* pFPS, XnUInt64 nNow = 0);
/**
* This function calculates the average FPS over the last frames.
*
* @param pFPS [in] A pointer to an XnFPSData struct.
* @param nAverageOver [in] The number of milliseconds to average over.
* @param nNow [in] Optional. Current time. When not provided, function will take it itself.
*/
XN_C_API XnDouble XN_C_DECL xnFPSCalc(XnFPSData* pFPS, XnUInt32 nAverageOver = 3000, XnUInt64 nNow = 0);
/**
* This function frees the FPS calculator.
*
* @param pFPS [in] A pointer to an XnFPSData struct.
*/
XN_C_API XnStatus XN_C_DECL xnFPSFree(XnFPSData* pFPS);
#endif //__XN_FPS_CALCULATOR_H__
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