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/****************************************************************************
* *
* OpenNI 1.x Alpha *
* Copyright (C) 2011 PrimeSense Ltd. *
* *
* This file is part of OpenNI. *
* *
* OpenNI 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. *
* *
* OpenNI 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 OpenNI. If not, see <http://www.gnu.org/licenses/>. *
* *
****************************************************************************/
// --------------------------------
// Include
// --------------------------------
#include "Statistics.h"
#include "Device.h"
#include "Draw.h"
#include <math.h>
// --------------------------------
// Global Variables
// --------------------------------
XnPixelStatistics* g_PixelStatistics = NULL;
enum XnCollectionStatus
{
NOT_COLLECTING,
SHOULD_COLLECT,
COLLECTING,
COLLECTION_ENDED,
} g_StatisticsState;
// --------------------------------
// Code
// --------------------------------
void statisticsInit()
{
g_PixelStatistics = NULL;
g_StatisticsState = NOT_COLLECTING;
const DepthMetaData* pDepthMD = getDepthMetaData();
if (pDepthMD != NULL)
{
g_PixelStatistics = new XnPixelStatistics[pDepthMD->FullXRes() * pDepthMD->FullYRes()];
}
}
void statisticsStart(int)
{
const DepthMetaData* pDepthMD = getDepthMetaData();
if (pDepthMD == NULL)
{
displayMessage("Can't collect statistics: Depth is turned off!");
return;
}
int nCount = pDepthMD->FullXRes() * pDepthMD->FullYRes();
XnDepthPixel nMaxDepth = getDepthGenerator()->GetDeviceMaxDepth();
XnPixelStatistics* pPixel = g_PixelStatistics;
for (int i = 0; i < nCount; ++i, ++pPixel)
{
xnOSMemSet(pPixel, 0, sizeof(XnPixelStatistics));
pPixel->nMin = nMaxDepth;
}
g_StatisticsState = SHOULD_COLLECT;
}
void toggleStatistics(int)
{
switch (g_StatisticsState)
{
case SHOULD_COLLECT:
case COLLECTING:
statisticsStop(0);
break;
case NOT_COLLECTING:
case COLLECTION_ENDED:
statisticsStart(0);
break;
}
}
void statisticsStop(int)
{
g_StatisticsState = COLLECTION_ENDED;
}
void statisticsClear(int)
{
g_StatisticsState = NOT_COLLECTING;
}
void statisticsAddFrame()
{
if (g_StatisticsState == SHOULD_COLLECT)
{
g_StatisticsState = COLLECTING;
}
if (g_StatisticsState == COLLECTING)
{
const DepthMetaData* pDepthMD = getDepthMetaData();
const XnDepthPixel* pDepth = pDepthMD->Data();
for (XnUInt32 y = pDepthMD->YOffset(); y < pDepthMD->YRes() + pDepthMD->YOffset(); ++y)
{
XnPixelStatistics* pPixel = &g_PixelStatistics[y*pDepthMD->FullXRes() + pDepthMD->XOffset()];
for (XnUInt32 x = pDepthMD->XOffset(); x < pDepthMD->XRes() + pDepthMD->XOffset(); ++x, ++pDepth, ++pPixel)
{
XnDepthPixel nDepth = *pDepth;
if (nDepth > pPixel->nMax)
pPixel->nMax = nDepth;
if (nDepth < pPixel->nMin)
pPixel->nMin = nDepth;
pPixel->nSum += nDepth;
pPixel->nSumSquare += (nDepth * nDepth);
pPixel->nCount++;
pPixel->dAverage = pPixel->nSum / pPixel->nCount;
pPixel->dStdDev = sqrt( (1.0/pPixel->nCount) * (pPixel->nSumSquare) - (pPixel->dAverage * pPixel->dAverage) );
}
}
}
}
bool isStatisticsActive()
{
return (g_StatisticsState == COLLECTING || g_StatisticsState == COLLECTION_ENDED);
}
void getStatisticsMessage(char* csMessage)
{
switch (g_StatisticsState)
{
case NOT_COLLECTING:
case SHOULD_COLLECT:
csMessage[0] = 0;
break;
case COLLECTING:
case COLLECTION_ENDED:
const DepthMetaData* pDepthMD = getDepthMetaData();
sprintf(csMessage, "Collected Statistics for %u frames", g_PixelStatistics[pDepthMD->YOffset()*pDepthMD->FullXRes() + pDepthMD->XOffset()].nCount);
break;
}
}
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