HEVC Test Model (HM)  HM-16.3
TEncPreanalyzer.cpp
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33 
38 #include <cfloat>
39 #include <algorithm>
40 
41 #include "TEncPreanalyzer.h"
42 
43 using namespace std;
44 
47 
51 {
52 }
53 
57 {
58 }
59 
65 {
66  TComPicYuv* pcPicYuv = pcEPic->getPicYuvOrg();
67  const Int iWidth = pcPicYuv->getWidth(COMPONENT_Y);
68  const Int iHeight = pcPicYuv->getHeight(COMPONENT_Y);
69  const Int iStride = pcPicYuv->getStride(COMPONENT_Y);
70 
71  for ( UInt d = 0; d < pcEPic->getMaxAQDepth(); d++ )
72  {
73  const Pel* pLineY = pcPicYuv->getAddr(COMPONENT_Y);
74  TEncPicQPAdaptationLayer* pcAQLayer = pcEPic->getAQLayer(d);
75  const UInt uiAQPartWidth = pcAQLayer->getAQPartWidth();
76  const UInt uiAQPartHeight = pcAQLayer->getAQPartHeight();
77  TEncQPAdaptationUnit* pcAQU = pcAQLayer->getQPAdaptationUnit();
78 
79  Double dSumAct = 0.0;
80  for ( UInt y = 0; y < iHeight; y += uiAQPartHeight )
81  {
82  const UInt uiCurrAQPartHeight = min(uiAQPartHeight, iHeight-y);
83  for ( UInt x = 0; x < iWidth; x += uiAQPartWidth, pcAQU++ )
84  {
85  const UInt uiCurrAQPartWidth = min(uiAQPartWidth, iWidth-x);
86  const Pel* pBlkY = &pLineY[x];
87  UInt64 uiSum[4] = {0, 0, 0, 0};
88  UInt64 uiSumSq[4] = {0, 0, 0, 0};
89  UInt uiNumPixInAQPart = 0;
90  UInt by = 0;
91  for ( ; by < uiCurrAQPartHeight>>1; by++ )
92  {
93  UInt bx = 0;
94  for ( ; bx < uiCurrAQPartWidth>>1; bx++, uiNumPixInAQPart++ )
95  {
96  uiSum [0] += pBlkY[bx];
97  uiSumSq[0] += pBlkY[bx] * pBlkY[bx];
98  }
99  for ( ; bx < uiCurrAQPartWidth; bx++, uiNumPixInAQPart++ )
100  {
101  uiSum [1] += pBlkY[bx];
102  uiSumSq[1] += pBlkY[bx] * pBlkY[bx];
103  }
104  pBlkY += iStride;
105  }
106  for ( ; by < uiCurrAQPartHeight; by++ )
107  {
108  UInt bx = 0;
109  for ( ; bx < uiCurrAQPartWidth>>1; bx++, uiNumPixInAQPart++ )
110  {
111  uiSum [2] += pBlkY[bx];
112  uiSumSq[2] += pBlkY[bx] * pBlkY[bx];
113  }
114  for ( ; bx < uiCurrAQPartWidth; bx++, uiNumPixInAQPart++ )
115  {
116  uiSum [3] += pBlkY[bx];
117  uiSumSq[3] += pBlkY[bx] * pBlkY[bx];
118  }
119  pBlkY += iStride;
120  }
121 
122  Double dMinVar = DBL_MAX;
123  for ( Int i=0; i<4; i++)
124  {
125  const Double dAverage = Double(uiSum[i]) / uiNumPixInAQPart;
126  const Double dVariance = Double(uiSumSq[i]) / uiNumPixInAQPart - dAverage * dAverage;
127  dMinVar = min(dMinVar, dVariance);
128  }
129  const Double dActivity = 1.0 + dMinVar;
130  pcAQU->setActivity( dActivity );
131  dSumAct += dActivity;
132  }
133  pLineY += iStride * uiCurrAQPartHeight;
134  }
135 
136  const Double dAvgAct = dSumAct / (pcAQLayer->getNumAQPartInWidth() * pcAQLayer->getNumAQPartInHeight());
137  pcAQLayer->setAvgActivity( dAvgAct );
138  }
139 }
141 
virtual ~TEncPreanalyzer()
picture YUV buffer class
Definition: TComPicYuv.h:55
void Void
Definition: TypeDef.h:285
Void xPreanalyze(TEncPic *pcPic)
Int getStride(const ComponentID id) const
Definition: TComPicYuv.h:113
Int getHeight(const ComponentID id) const
Definition: TComPicYuv.h:109
unsigned int UInt
Definition: TypeDef.h:297
Short Pel
pixel type
Definition: TypeDef.h:692
STL namespace.
Void setAvgActivity(Double d)
Definition: TEncPic.h:91
Picture class including local image characteristics information for QP adaptation.
Definition: TEncPic.h:95
Int getWidth(const ComponentID id) const
Definition: TComPicYuv.h:108
Void setActivity(Double d)
Definition: TEncPic.h:61
UInt getNumAQPartInHeight()
Definition: TEncPic.h:86
TComPicYuv * getPicYuvOrg()
Definition: TComPic.h:108
Local image characteristics for CUs on a specific depth.
Definition: TEncPic.h:66
unsigned long long UInt64
Definition: TypeDef.h:318
UInt getNumAQPartInWidth()
Definition: TEncPic.h:85
TEncPicQPAdaptationLayer * getAQLayer(UInt uiDepth)
Definition: TEncPic.h:108
Pel * getAddr(const ComponentID ch)
Definition: TComPicYuv.h:127
int Int
Definition: TypeDef.h:296
UInt getMaxAQDepth()
Definition: TEncPic.h:109
Unit block for storing image characteristics.
Definition: TEncPic.h:52
source picture analyzer class (header)
double Double
Definition: TypeDef.h:298
TEncQPAdaptationUnit * getQPAdaptationUnit()
Definition: TEncPic.h:88