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Karsten Suehring
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/* The copyright in this software is being made available under the BSD
* License, included below. This software may be subject to other third party
* and contributor rights, including patent rights, and no such rights are
* granted under this license.
*
* Copyright (c) 2010-2019, ITU/ISO/IEC
Karsten Suehring
committed
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* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* * Neither the name of the ITU/ISO/IEC nor the names of its contributors may
* be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
/** \file AQp.cpp
\brief class of picture which includes side information for encoder
*/
#include "AQp.h"
#include <float.h>
//! \ingroup EncoderLib
//! \{
/** Constructor
*/
AQpLayer::AQpLayer( int iWidth, int iHeight, uint32_t uiAQPartWidth, uint32_t uiAQPartHeight )
: m_uiAQPartWidth(uiAQPartWidth)
, m_uiAQPartHeight(uiAQPartHeight)
, m_uiNumAQPartInWidth((iWidth + uiAQPartWidth-1) / uiAQPartWidth)
, m_uiNumAQPartInHeight((iHeight + uiAQPartHeight-1) / uiAQPartHeight)
, m_dAvgActivity(0.0)
, m_acEncAQU( m_uiNumAQPartInWidth * m_uiNumAQPartInHeight, 0.0 )
{
}
/** Destructor
*/
AQpLayer::~AQpLayer()
{
}
/** Analyze source picture and compute local image characteristics used for QP adaptation
* \param pcEPic Picture object to be analyzed
* \return void
*/
void AQpPreanalyzer::preanalyze( Picture* pcEPic )
{
const CPelBuf lumaPlane = pcEPic->getOrigBuf().Y();
const int iWidth = lumaPlane.width;
const int iHeight = lumaPlane.height;
const int iStride = lumaPlane.stride;
for ( uint32_t d = 0; d < pcEPic->aqlayer.size(); d++ )
{
const Pel* pLineY = lumaPlane.bufAt( 0, 0);
AQpLayer* pcAQLayer = pcEPic->aqlayer[d];
const uint32_t uiAQPartWidth = pcAQLayer->getAQPartWidth();
const uint32_t uiAQPartHeight = pcAQLayer->getAQPartHeight();
double* pcAQU = &pcAQLayer->getQPAdaptationUnit()[0];
double dSumAct = 0.0;
for ( uint32_t y = 0; y < iHeight; y += uiAQPartHeight )
{
const uint32_t uiCurrAQPartHeight = std::min(uiAQPartHeight, iHeight-y);
for ( uint32_t x = 0; x < iWidth; x += uiAQPartWidth, pcAQU++ )
{
const uint32_t uiCurrAQPartWidth = std::min(uiAQPartWidth, iWidth-x);
const Pel* pBlkY = &pLineY[x];
uint64_t uiSum[4] = {0, 0, 0, 0};
uint64_t uiSumSq[4] = {0, 0, 0, 0};
uint32_t by = 0;
for ( ; by < uiCurrAQPartHeight>>1; by++ )
{
uint32_t bx = 0;
for ( ; bx < uiCurrAQPartWidth>>1; bx++ )
{
uiSum [0] += pBlkY[bx];
uiSumSq[0] += pBlkY[bx] * pBlkY[bx];
}
for ( ; bx < uiCurrAQPartWidth; bx++ )
{
uiSum [1] += pBlkY[bx];
uiSumSq[1] += pBlkY[bx] * pBlkY[bx];
}
pBlkY += iStride;
}
for ( ; by < uiCurrAQPartHeight; by++ )
{
uint32_t bx = 0;
for ( ; bx < uiCurrAQPartWidth>>1; bx++ )
{
uiSum [2] += pBlkY[bx];
uiSumSq[2] += pBlkY[bx] * pBlkY[bx];
}
for ( ; bx < uiCurrAQPartWidth; bx++ )
{
uiSum [3] += pBlkY[bx];
uiSumSq[3] += pBlkY[bx] * pBlkY[bx];
}
pBlkY += iStride;
}
CHECK((uiCurrAQPartWidth&1)!=0, "Odd part width unsupported");
CHECK((uiCurrAQPartHeight&1)!=0, "Odd part height unsupported");
const uint32_t pixelWidthOfQuadrants = uiCurrAQPartWidth >>1;
const uint32_t pixelHeightOfQuadrants = uiCurrAQPartHeight>>1;
const uint32_t numPixInAQPart = pixelWidthOfQuadrants * pixelHeightOfQuadrants;
double dMinVar = DBL_MAX;
if (numPixInAQPart!=0)
{
for ( int i=0; i<4; i++)
{
const double dAverage = double(uiSum[i]) / numPixInAQPart;
const double dVariance = double(uiSumSq[i]) / numPixInAQPart - dAverage * dAverage;
dMinVar = std::min(dMinVar, dVariance);
}
}
else
{
dMinVar = 0.0;
}
const double dActivity = 1.0 + dMinVar;
*pcAQU = dActivity;
dSumAct += dActivity;
}
pLineY += iStride * uiCurrAQPartHeight;
}
const double dAvgAct = dSumAct / (pcAQLayer->getNumAQPartInWidth() * pcAQLayer->getNumAQPartInHeight());
pcAQLayer->setAvgActivity( dAvgAct );
}
}
//! \}