-
Karsten Suehring authoredKarsten Suehring authored
DepQuant.cpp 72.19 KiB
/* 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
* 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.
*/
#include "DepQuant.h"
#include "TrQuant.h"
#include "CodingStructure.h"
#include "UnitTools.h"
#include <bitset>
namespace DQIntern
{
/*================================================================================*/
/*===== =====*/
/*===== R A T E E S T I M A T O R =====*/
/*===== =====*/
/*================================================================================*/
struct NbInfoSbb
{
uint8_t num;
uint8_t inPos[5];
};
struct NbInfoOut
{
uint16_t maxDist;
uint16_t num;
uint16_t outPos[5];
};
struct CoeffFracBits
{
int32_t bits[6];
};
enum ScanPosType { SCAN_ISCSBB = 0, SCAN_SOCSBB = 1, SCAN_EOCSBB = 2 };
struct ScanInfo
{
ScanInfo() {}
int sbbSize;
int numSbb;
int scanIdx;
int rasterPos;
int sbbPos;
int insidePos;
bool eosbb;
ScanPosType spt;
unsigned sigCtxOffsetNext;
unsigned gtxCtxOffsetNext;
int nextInsidePos;
NbInfoSbb nextNbInfoSbb;
int nextSbbRight;
int nextSbbBelow;
int posX;
int posY;
#if JVET_O0052_TU_LEVEL_CTX_CODED_BIN_CONSTRAINT
ChannelType chType;
int sbtInfo;
int tuWidth;
int tuHeight;
#endif
};
class Rom;
struct TUParameters
{
TUParameters ( const Rom& rom, const unsigned width, const unsigned height, const ChannelType chType );
~TUParameters()
{
delete [] m_scanInfo;
}
ChannelType m_chType;
unsigned m_width;
unsigned m_height;
unsigned m_numCoeff;
unsigned m_numSbb;
unsigned m_log2SbbWidth;
unsigned m_log2SbbHeight;
unsigned m_log2SbbSize;
unsigned m_sbbSize;
unsigned m_sbbMask;
unsigned m_widthInSbb;
unsigned m_heightInSbb;
CoeffScanType m_scanType;
const ScanElement *m_scanSbbId2SbbPos;
const ScanElement *m_scanId2BlkPos;
const NbInfoSbb* m_scanId2NbInfoSbb;
const NbInfoOut* m_scanId2NbInfoOut;
ScanInfo* m_scanInfo;
private:
void xSetScanInfo( ScanInfo& scanInfo, int scanIdx );
};
class Rom
{
public:
Rom() : m_scansInitialized(false) {}
~Rom() { xUninitScanArrays(); }
void init () { xInitScanArrays(); }
const NbInfoSbb* getNbInfoSbb( int hd, int vd ) const { return m_scanId2NbInfoSbbArray[hd][vd]; }
const NbInfoOut* getNbInfoOut( int hd, int vd ) const { return m_scanId2NbInfoOutArray[hd][vd]; }
const TUParameters* getTUPars ( const CompArea& area, const ComponentID compID ) const
{ return m_tuParameters[floorLog2(area.width)][floorLog2(area.height)][toChannelType(compID)];
}
private:
void xInitScanArrays ();
void xUninitScanArrays ();
private:
bool m_scansInitialized;
NbInfoSbb* m_scanId2NbInfoSbbArray[ MAX_CU_DEPTH+1 ][ MAX_CU_DEPTH+1 ];
NbInfoOut* m_scanId2NbInfoOutArray[ MAX_CU_DEPTH+1 ][ MAX_CU_DEPTH+1 ];
TUParameters* m_tuParameters [ MAX_CU_DEPTH+1 ][ MAX_CU_DEPTH+1 ][ MAX_NUM_CHANNEL_TYPE ];
};
void Rom::xInitScanArrays()
{
if( m_scansInitialized )
{
return;
}
::memset( m_scanId2NbInfoSbbArray, 0, sizeof(m_scanId2NbInfoSbbArray) );
::memset( m_scanId2NbInfoOutArray, 0, sizeof(m_scanId2NbInfoOutArray) );
::memset( m_tuParameters, 0, sizeof(m_tuParameters) );
uint32_t raster2id[ MAX_CU_SIZE * MAX_CU_SIZE ];
::memset(raster2id, 0, sizeof(raster2id));
for( int hd = 0; hd <= MAX_CU_DEPTH; hd++ )
{
for( int vd = 0; vd <= MAX_CU_DEPTH; vd++ )
{
if( (hd == 0 && vd <= 1) || (hd <= 1 && vd == 0) )
{
continue;
}
const uint32_t blockWidth = (1 << hd);
const uint32_t blockHeight = (1 << vd);
const uint32_t log2CGWidth = g_log2SbbSize[hd][vd][0];
const uint32_t log2CGHeight = g_log2SbbSize[hd][vd][1];
const uint32_t groupWidth = 1 << log2CGWidth;
const uint32_t groupHeight = 1 << log2CGHeight;
const uint32_t groupSize = groupWidth * groupHeight;
const CoeffScanType scanType = SCAN_DIAG;
const SizeType blkWidthIdx = gp_sizeIdxInfo->idxFrom( blockWidth );
const SizeType blkHeightIdx = gp_sizeIdxInfo->idxFrom( blockHeight );
const ScanElement * scanId2RP = g_scanOrder[SCAN_GROUPED_4x4][scanType][blkWidthIdx][blkHeightIdx];
NbInfoSbb*& sId2NbSbb = m_scanId2NbInfoSbbArray[hd][vd];
NbInfoOut*& sId2NbOut = m_scanId2NbInfoOutArray[hd][vd];
// consider only non-zero-out region
const uint32_t blkWidthNZOut = std::min<unsigned>( JVET_C0024_ZERO_OUT_TH, blockWidth );
const uint32_t blkHeightNZOut= std::min<unsigned>( JVET_C0024_ZERO_OUT_TH, blockHeight );
const uint32_t totalValues = blkWidthNZOut * blkHeightNZOut;
sId2NbSbb = new NbInfoSbb[ totalValues ];
sId2NbOut = new NbInfoOut[ totalValues ];
for( uint32_t scanId = 0; scanId < totalValues; scanId++ )
{
raster2id[scanId2RP[scanId].idx] = scanId;
}
for( unsigned scanId = 0; scanId < totalValues; scanId++ )
{
const int posX = scanId2RP[scanId].x;
const int posY = scanId2RP[scanId].y;
const int rpos = scanId2RP[scanId].idx;
{
//===== inside subband neighbours =====
NbInfoSbb& nbSbb = sId2NbSbb[ scanId ];
const int begSbb = scanId - ( scanId & (groupSize-1) ); // first pos in current subblock
int cpos[5];
cpos[0] = ( posX + 1 < blkWidthNZOut ? ( raster2id[rpos+1 ] < groupSize + begSbb ? raster2id[rpos+1 ] - begSbb : 0 ) : 0 );
cpos[1] = ( posX + 2 < blkWidthNZOut ? ( raster2id[rpos+2 ] < groupSize + begSbb ? raster2id[rpos+2 ] - begSbb : 0 ) : 0 );
cpos[2] = ( posX + 1 < blkWidthNZOut && posY + 1 < blkHeightNZOut ? ( raster2id[rpos+1+blockWidth] < groupSize + begSbb ? raster2id[rpos+1+blockWidth] - begSbb : 0 ) : 0 );
cpos[3] = ( posY + 1 < blkHeightNZOut ? ( raster2id[rpos+ blockWidth] < groupSize + begSbb ? raster2id[rpos+ blockWidth] - begSbb : 0 ) : 0 );
cpos[4] = ( posY + 2 < blkHeightNZOut ? ( raster2id[rpos+2*blockWidth] < groupSize + begSbb ? raster2id[rpos+2*blockWidth] - begSbb : 0 ) : 0 );
for( nbSbb.num = 0; true; )
{
int nk = -1;
for( int k = 0; k < 5; k++ )
{
if( cpos[k] != 0 && ( nk < 0 || cpos[k] < cpos[nk] ) )
{
nk = k;
}
}
if( nk < 0 )
{
break;
}
nbSbb.inPos[ nbSbb.num++ ] = uint8_t( cpos[nk] );
cpos[nk] = 0;
}
for( int k = nbSbb.num; k < 5; k++ )
{
nbSbb.inPos[k] = 0;
}
}
{
//===== outside subband neighbours =====
NbInfoOut& nbOut = sId2NbOut[ scanId ];
const int begSbb = scanId - ( scanId & (groupSize-1) ); // first pos in current subblock
int cpos[5];
cpos[0] = ( posX + 1 < blkWidthNZOut ? ( raster2id[rpos+1 ] >= groupSize + begSbb ? raster2id[rpos+1 ] : 0 ) : 0 );
cpos[1] = ( posX + 2 < blkWidthNZOut ? ( raster2id[rpos+2 ] >= groupSize + begSbb ? raster2id[rpos+2 ] : 0 ) : 0 );
cpos[2] = ( posX + 1 < blkWidthNZOut && posY + 1 < blkHeightNZOut ? ( raster2id[rpos+1+blockWidth] >= groupSize + begSbb ? raster2id[rpos+1+blockWidth] : 0 ) : 0 );
cpos[3] = ( posY + 1 < blkHeightNZOut ? ( raster2id[rpos+ blockWidth] >= groupSize + begSbb ? raster2id[rpos+ blockWidth] : 0 ) : 0 );
cpos[4] = ( posY + 2 < blkHeightNZOut ? ( raster2id[rpos+2*blockWidth] >= groupSize + begSbb ? raster2id[rpos+2*blockWidth] : 0 ) : 0 );
for( nbOut.num = 0; true; )
{
int nk = -1;
for( int k = 0; k < 5; k++ )
{
if( cpos[k] != 0 && ( nk < 0 || cpos[k] < cpos[nk] ) )
{
nk = k;
}
}
if( nk < 0 )
{
break;
}
nbOut.outPos[ nbOut.num++ ] = uint16_t( cpos[nk] );
cpos[nk] = 0;
}
for( int k = nbOut.num; k < 5; k++ )
{
nbOut.outPos[k] = 0;
}
nbOut.maxDist = ( scanId == 0 ? 0 : sId2NbOut[scanId-1].maxDist );
for( int k = 0; k < nbOut.num; k++ )
{
if( nbOut.outPos[k] > nbOut.maxDist )
{
nbOut.maxDist = nbOut.outPos[k];
}
}
} }
// make it relative
for( unsigned scanId = 0; scanId < totalValues; scanId++ )
{
NbInfoOut& nbOut = sId2NbOut[scanId];
const int begSbb = scanId - ( scanId & (groupSize-1) ); // first pos in current subblock
for( int k = 0; k < nbOut.num; k++ )
{
CHECK(begSbb > nbOut.outPos[k], "Position must be past sub block begin");
nbOut.outPos[k] -= begSbb;
}
nbOut.maxDist -= scanId;
}
for( int chId = 0; chId < MAX_NUM_CHANNEL_TYPE; chId++ )
{
m_tuParameters[hd][vd][chId] = new TUParameters( *this, blockWidth, blockHeight, ChannelType(chId) );
}
}
}
m_scansInitialized = true;
}
void Rom::xUninitScanArrays()
{
if( !m_scansInitialized )
{
return;
}
for( int hd = 0; hd <= MAX_CU_DEPTH; hd++ )
{
for( int vd = 0; vd <= MAX_CU_DEPTH; vd++ )
{
NbInfoSbb*& sId2NbSbb = m_scanId2NbInfoSbbArray[hd][vd];
NbInfoOut*& sId2NbOut = m_scanId2NbInfoOutArray[hd][vd];
if( sId2NbSbb )
{
delete [] sId2NbSbb;
}
if( sId2NbOut )
{
delete [] sId2NbOut;
}
for( int chId = 0; chId < MAX_NUM_CHANNEL_TYPE; chId++ )
{
TUParameters*& tuPars = m_tuParameters[hd][vd][chId];
if( tuPars )
{
delete tuPars;
}
}
}
}
m_scansInitialized = false;
}
static Rom g_Rom;
TUParameters::TUParameters( const Rom& rom, const unsigned width, const unsigned height, const ChannelType chType )
{
m_chType = chType;
m_width = width;
m_height = height;
const uint32_t nonzeroWidth = std::min<uint32_t>(JVET_C0024_ZERO_OUT_TH, m_width);
const uint32_t nonzeroHeight = std::min<uint32_t>(JVET_C0024_ZERO_OUT_TH, m_height);
m_numCoeff = nonzeroWidth * nonzeroHeight;
const int log2W = floorLog2( m_width ); const int log2H = floorLog2( m_height );
m_log2SbbWidth = g_log2SbbSize[ log2W ][ log2H ][0];
m_log2SbbHeight = g_log2SbbSize[ log2W ][ log2H ][1];
m_log2SbbSize = m_log2SbbWidth + m_log2SbbHeight;
m_sbbSize = ( 1 << m_log2SbbSize );
m_sbbMask = m_sbbSize - 1;
m_widthInSbb = nonzeroWidth >> m_log2SbbWidth;
m_heightInSbb = nonzeroHeight >> m_log2SbbHeight;
m_numSbb = m_widthInSbb * m_heightInSbb;
m_scanType = SCAN_DIAG;
SizeType hsbb = gp_sizeIdxInfo->idxFrom( m_widthInSbb );
SizeType vsbb = gp_sizeIdxInfo->idxFrom( m_heightInSbb );
SizeType hsId = gp_sizeIdxInfo->idxFrom( m_width );
SizeType vsId = gp_sizeIdxInfo->idxFrom( m_height );
m_scanSbbId2SbbPos = g_scanOrder [ SCAN_UNGROUPED ][ m_scanType ][ hsbb ][ vsbb ];
m_scanId2BlkPos = g_scanOrder [ SCAN_GROUPED_4x4 ][ m_scanType ][ hsId ][ vsId ];
m_scanId2NbInfoSbb = rom.getNbInfoSbb( log2W, log2H );
m_scanId2NbInfoOut = rom.getNbInfoOut( log2W, log2H );
m_scanInfo = new ScanInfo[ m_numCoeff ];
for( int scanIdx = 0; scanIdx < m_numCoeff; scanIdx++ )
{
xSetScanInfo( m_scanInfo[scanIdx], scanIdx );
}
}
void TUParameters::xSetScanInfo( ScanInfo& scanInfo, int scanIdx )
{
#if JVET_O0052_TU_LEVEL_CTX_CODED_BIN_CONSTRAINT
scanInfo.chType = m_chType;
scanInfo.tuWidth = m_width;
scanInfo.tuHeight = m_height;
#endif
scanInfo.sbbSize = m_sbbSize;
scanInfo.numSbb = m_numSbb;
scanInfo.scanIdx = scanIdx;
scanInfo.rasterPos = m_scanId2BlkPos[scanIdx].idx;
scanInfo.sbbPos = m_scanSbbId2SbbPos[scanIdx >> m_log2SbbSize].idx;
scanInfo.insidePos = scanIdx & m_sbbMask;
scanInfo.eosbb = ( scanInfo.insidePos == 0 );
scanInfo.spt = SCAN_ISCSBB;
if( scanInfo.insidePos == m_sbbMask && scanIdx > scanInfo.sbbSize && scanIdx < m_numCoeff - 1 )
scanInfo.spt = SCAN_SOCSBB;
else if( scanInfo.eosbb && scanIdx > 0 && scanIdx < m_numCoeff - m_sbbSize )
scanInfo.spt = SCAN_EOCSBB;
scanInfo.posX = m_scanId2BlkPos[scanIdx].x;
scanInfo.posY = m_scanId2BlkPos[scanIdx].y;
if( scanIdx )
{
const int nextScanIdx = scanIdx - 1;
const int diag = m_scanId2BlkPos[nextScanIdx].x + m_scanId2BlkPos[nextScanIdx].y;
if( m_chType == CHANNEL_TYPE_LUMA )
{
#if JVET_O0617_SIG_FLAG_CONTEXT_REDUCTION
scanInfo.sigCtxOffsetNext = ( diag < 2 ? 8 : diag < 5 ? 4 : 0 );
#else
scanInfo.sigCtxOffsetNext = ( diag < 2 ? 12 : diag < 5 ? 6 : 0 );
#endif
scanInfo.gtxCtxOffsetNext = ( diag < 1 ? 16 : diag < 3 ? 11 : diag < 10 ? 6 : 1 );
}
else
{
#if JVET_O0617_SIG_FLAG_CONTEXT_REDUCTION
scanInfo.sigCtxOffsetNext = ( diag < 2 ? 4 : 0 );
#else
scanInfo.sigCtxOffsetNext = ( diag < 2 ? 6 : 0 );
#endif
scanInfo.gtxCtxOffsetNext = ( diag < 1 ? 6 : 1 );
}
scanInfo.nextInsidePos = nextScanIdx & m_sbbMask; scanInfo.nextNbInfoSbb = m_scanId2NbInfoSbb[ nextScanIdx ];
if( scanInfo.eosbb )
{
const int nextSbbPos = m_scanSbbId2SbbPos[nextScanIdx >> m_log2SbbSize].idx;
const int nextSbbPosY = nextSbbPos / m_widthInSbb;
const int nextSbbPosX = nextSbbPos - nextSbbPosY * m_widthInSbb;
scanInfo.nextSbbRight = ( nextSbbPosX < m_widthInSbb - 1 ? nextSbbPos + 1 : 0 );
scanInfo.nextSbbBelow = ( nextSbbPosY < m_heightInSbb - 1 ? nextSbbPos + m_widthInSbb : 0 );
}
}
}
class RateEstimator
{
public:
RateEstimator () {}
~RateEstimator() {}
void initCtx ( const TUParameters& tuPars, const TransformUnit& tu, const ComponentID compID, const FracBitsAccess& fracBitsAccess );
inline const BinFracBits *sigSbbFracBits() const { return m_sigSbbFracBits; }
inline const BinFracBits *sigFlagBits(unsigned stateId) const
{
return m_sigFracBits[std::max(((int) stateId) - 1, 0)];
}
inline const CoeffFracBits *gtxFracBits(unsigned stateId) const { return m_gtxFracBits; }
inline int32_t lastOffset(unsigned scanIdx) const
{
return m_lastBitsX[m_scanId2Pos[scanIdx].x] + m_lastBitsY[m_scanId2Pos[scanIdx].y];
}
private:
void xSetLastCoeffOffset ( const FracBitsAccess& fracBitsAccess, const TUParameters& tuPars, const TransformUnit& tu, const ComponentID compID );
void xSetSigSbbFracBits ( const FracBitsAccess& fracBitsAccess, ChannelType chType );
void xSetSigFlagBits ( const FracBitsAccess& fracBitsAccess, ChannelType chType );
void xSetGtxFlagBits ( const FracBitsAccess& fracBitsAccess, ChannelType chType );
private:
static const unsigned sm_numCtxSetsSig = 3;
static const unsigned sm_numCtxSetsGtx = 2;
static const unsigned sm_maxNumSigSbbCtx = 2;
#if JVET_O0617_SIG_FLAG_CONTEXT_REDUCTION
static const unsigned sm_maxNumSigCtx = 12;
#else
static const unsigned sm_maxNumSigCtx = 18;
#endif
static const unsigned sm_maxNumGtxCtx = 21;
private:
const ScanElement * m_scanId2Pos;
int32_t m_lastBitsX [ MAX_TB_SIZEY ];
int32_t m_lastBitsY [ MAX_TB_SIZEY ];
BinFracBits m_sigSbbFracBits [ sm_maxNumSigSbbCtx ];
BinFracBits m_sigFracBits [ sm_numCtxSetsSig ][ sm_maxNumSigCtx ];
CoeffFracBits m_gtxFracBits [ sm_maxNumGtxCtx ];
};
void RateEstimator::initCtx( const TUParameters& tuPars, const TransformUnit& tu, const ComponentID compID, const FracBitsAccess& fracBitsAccess )
{
m_scanId2Pos = tuPars.m_scanId2BlkPos;
xSetSigSbbFracBits ( fracBitsAccess, tuPars.m_chType );
xSetSigFlagBits ( fracBitsAccess, tuPars.m_chType );
xSetGtxFlagBits ( fracBitsAccess, tuPars.m_chType );
xSetLastCoeffOffset ( fracBitsAccess, tuPars, tu, compID );
}
void RateEstimator::xSetLastCoeffOffset( const FracBitsAccess& fracBitsAccess, const TUParameters& tuPars, const TransformUnit& tu, const ComponentID compID )
{
const ChannelType chType = ( compID == COMPONENT_Y ? CHANNEL_TYPE_LUMA : CHANNEL_TYPE_CHROMA ); int32_t cbfDeltaBits = 0;
if( compID == COMPONENT_Y && !CU::isIntra(*tu.cu) && !tu.depth )
{
const BinFracBits bits = fracBitsAccess.getFracBitsArray( Ctx::QtRootCbf() );
cbfDeltaBits = int32_t( bits.intBits[1] ) - int32_t( bits.intBits[0] );
}
else
{
BinFracBits bits;
bool prevLumaCbf = false;
bool lastCbfIsInferred = false;
bool useIntraSubPartitions = tu.cu->ispMode && isLuma(chType);
if( useIntraSubPartitions )
{
bool rootCbfSoFar = false;
bool isLastSubPartition = CU::isISPLast(*tu.cu, tu.Y(), compID);
uint32_t nTus = tu.cu->ispMode == HOR_INTRA_SUBPARTITIONS ? tu.cu->lheight() >> floorLog2(tu.lheight()) : tu.cu->lwidth() >> floorLog2(tu.lwidth());
if( isLastSubPartition )
{
TransformUnit* tuPointer = tu.cu->firstTU;
for( int tuIdx = 0; tuIdx < nTus - 1; tuIdx++ )
{
rootCbfSoFar |= TU::getCbfAtDepth(*tuPointer, COMPONENT_Y, tu.depth);
tuPointer = tuPointer->next;
}
if( !rootCbfSoFar )
{
lastCbfIsInferred = true;
}
}
if( !lastCbfIsInferred )
{
prevLumaCbf = TU::getPrevTuCbfAtDepth(tu, compID, tu.depth);
}
#if JVET_O0193_REMOVE_TR_DEPTH_IN_CBF_CTX
bits = fracBitsAccess.getFracBitsArray(Ctx::QtCbf[compID](DeriveCtx::CtxQtCbf(compID, prevLumaCbf, true)));
#else
bits = fracBitsAccess.getFracBitsArray(Ctx::QtCbf[compID](DeriveCtx::CtxQtCbf(compID, tu.depth, prevLumaCbf, true)));
#endif
}
else
{
#if JVET_O0193_REMOVE_TR_DEPTH_IN_CBF_CTX
bits = fracBitsAccess.getFracBitsArray(Ctx::QtCbf[compID](DeriveCtx::CtxQtCbf(compID, tu.cbf[COMPONENT_Cb])));
#else
bits = fracBitsAccess.getFracBitsArray(Ctx::QtCbf[compID](DeriveCtx::CtxQtCbf(compID, tu.depth, tu.cbf[COMPONENT_Cb])));
#endif
}
cbfDeltaBits = lastCbfIsInferred ? 0 : int32_t(bits.intBits[1]) - int32_t(bits.intBits[0]);
}
static const unsigned prefixCtx[] = { 0, 0, 0, 3, 6, 10, 15, 21 };
uint32_t ctxBits [ LAST_SIGNIFICANT_GROUPS ];
for( unsigned xy = 0; xy < 2; xy++ )
{
int32_t bitOffset = ( xy ? cbfDeltaBits : 0 );
int32_t* lastBits = ( xy ? m_lastBitsY : m_lastBitsX );
const unsigned size = ( xy ? tuPars.m_height : tuPars.m_width );
const unsigned log2Size = ceilLog2( size );
const bool useYCtx = ( xy != 0 );
const CtxSet& ctxSetLast = ( useYCtx ? Ctx::LastY : Ctx::LastX )[ chType ];
const unsigned lastShift = ( compID == COMPONENT_Y ? (log2Size+1)>>2 : Clip3<unsigned>(0,2,size>>3) );
const unsigned lastOffset = ( compID == COMPONENT_Y ? ( prefixCtx[log2Size] ) : 0 );
uint32_t sumFBits = 0;
unsigned maxCtxId = g_uiGroupIdx[std::min<unsigned>(JVET_C0024_ZERO_OUT_TH, size) - 1];
for( unsigned ctxId = 0; ctxId < maxCtxId; ctxId++ )
{
const BinFracBits bits = fracBitsAccess.getFracBitsArray( ctxSetLast( lastOffset + ( ctxId >> lastShift ) ) );
ctxBits[ ctxId ] = sumFBits + bits.intBits[0] + ( ctxId>3 ? ((ctxId-2)>>1)<<SCALE_BITS : 0 ) + bitOffset;
sumFBits += bits.intBits[1]; }
ctxBits [ maxCtxId ] = sumFBits + ( maxCtxId>3 ? ((maxCtxId-2)>>1)<<SCALE_BITS : 0 ) + bitOffset;
for (unsigned pos = 0; pos < std::min<unsigned>(JVET_C0024_ZERO_OUT_TH, size); pos++)
{
lastBits[ pos ] = ctxBits[ g_uiGroupIdx[ pos ] ];
}
}
}
void RateEstimator::xSetSigSbbFracBits( const FracBitsAccess& fracBitsAccess, ChannelType chType )
{
const CtxSet& ctxSet = Ctx::SigCoeffGroup[ chType ];
for( unsigned ctxId = 0; ctxId < sm_maxNumSigSbbCtx; ctxId++ )
{
m_sigSbbFracBits[ ctxId ] = fracBitsAccess.getFracBitsArray( ctxSet( ctxId ) );
}
}
void RateEstimator::xSetSigFlagBits( const FracBitsAccess& fracBitsAccess, ChannelType chType )
{
for( unsigned ctxSetId = 0; ctxSetId < sm_numCtxSetsSig; ctxSetId++ )
{
BinFracBits* bits = m_sigFracBits [ ctxSetId ];
const CtxSet& ctxSet = Ctx::SigFlag [ chType + 2*ctxSetId ];
#if JVET_O0617_SIG_FLAG_CONTEXT_REDUCTION
const unsigned numCtx = ( chType == CHANNEL_TYPE_LUMA ? 12 : 8 );
#else
const unsigned numCtx = ( chType == CHANNEL_TYPE_LUMA ? 18 : 12 );
#endif
for( unsigned ctxId = 0; ctxId < numCtx; ctxId++ )
{
bits[ ctxId ] = fracBitsAccess.getFracBitsArray( ctxSet( ctxId ) );
}
}
}
void RateEstimator::xSetGtxFlagBits( const FracBitsAccess& fracBitsAccess, ChannelType chType )
{
const CtxSet& ctxSetPar = Ctx::ParFlag [ chType ];
const CtxSet& ctxSetGt1 = Ctx::GtxFlag [ 2 + chType ];
const CtxSet& ctxSetGt2 = Ctx::GtxFlag [ chType ];
const unsigned numCtx = ( chType == CHANNEL_TYPE_LUMA ? 21 : 11 );
for( unsigned ctxId = 0; ctxId < numCtx; ctxId++ )
{
BinFracBits fbPar = fracBitsAccess.getFracBitsArray( ctxSetPar( ctxId ) );
BinFracBits fbGt1 = fracBitsAccess.getFracBitsArray( ctxSetGt1( ctxId ) );
BinFracBits fbGt2 = fracBitsAccess.getFracBitsArray( ctxSetGt2( ctxId ) );
CoeffFracBits& cb = m_gtxFracBits[ ctxId ];
int32_t par0 = (1<<SCALE_BITS) + int32_t(fbPar.intBits[0]);
int32_t par1 = (1<<SCALE_BITS) + int32_t(fbPar.intBits[1]);
cb.bits[0] = 0;
cb.bits[1] = fbGt1.intBits[0] + (1 << SCALE_BITS);
cb.bits[2] = fbGt1.intBits[1] + par0 + fbGt2.intBits[0];
cb.bits[3] = fbGt1.intBits[1] + par1 + fbGt2.intBits[0];
cb.bits[4] = fbGt1.intBits[1] + par0 + fbGt2.intBits[1];
cb.bits[5] = fbGt1.intBits[1] + par1 + fbGt2.intBits[1];
}
}
/*================================================================================*/
/*===== =====*/
/*===== D A T A S T R U C T U R E S =====*/
/*===== =====*/
/*================================================================================*/
struct PQData
{
TCoeff absLevel;
int64_t deltaDist;
};
struct Decision
{
int64_t rdCost;
TCoeff absLevel;
int prevId;
};
/*================================================================================*/
/*===== =====*/
/*===== P R E - Q U A N T I Z E R =====*/
/*===== =====*/
/*================================================================================*/
class Quantizer
{
public:
Quantizer() {}
void dequantBlock ( const TransformUnit& tu, const ComponentID compID, const QpParam& cQP, CoeffBuf& recCoeff, bool enableScalingLists, int* piDequantCoef ) const;
void initQuantBlock ( const TransformUnit& tu, const ComponentID compID, const QpParam& cQP, const double lambda, int gValue );
inline void preQuantCoeff( const TCoeff absCoeff, PQData *pqData, int quanCoeff ) const;
inline TCoeff getLastThreshold() const { return m_thresLast; }
inline TCoeff getSSbbThreshold() const { return m_thresSSbb; }
inline int64_t getQScale() const { return m_QScale; }
private:
// quantization
int m_QShift;
int64_t m_QAdd;
int64_t m_QScale;
TCoeff m_maxQIdx;
TCoeff m_thresLast;
TCoeff m_thresSSbb;
// distortion normalization
int m_DistShift;
int64_t m_DistAdd;
int64_t m_DistStepAdd;
int64_t m_DistOrgFact;
};
inline int ceil_log2(uint64_t x)
{
static const uint64_t t[6] = { 0xFFFFFFFF00000000ull, 0x00000000FFFF0000ull, 0x000000000000FF00ull, 0x00000000000000F0ull, 0x000000000000000Cull, 0x0000000000000002ull };
int y = (((x & (x - 1)) == 0) ? 0 : 1);
int j = 32;
for( int i = 0; i < 6; i++)
{
int k = (((x & t[i]) == 0) ? 0 : j);
y += k;
x >>= k;
j >>= 1;
}
return y;
}
void Quantizer::initQuantBlock(const TransformUnit& tu, const ComponentID compID, const QpParam& cQP, const double lambda, int gValue = -1)
{
CHECKD( lambda <= 0.0, "Lambda must be greater than 0" );
#if JVET_O0919_TS_MIN_QP
const int qpDQ = cQP.Qp(tu.mtsIdx==MTS_SKIP && isLuma(compID)) + 1;
#else const int qpDQ = cQP.Qp + 1;
#endif
const int qpPer = qpDQ / 6;
const int qpRem = qpDQ - 6 * qpPer;
const SPS& sps = *tu.cs->sps;
const CompArea& area = tu.blocks[ compID ];
const ChannelType chType = toChannelType( compID );
const int channelBitDepth = sps.getBitDepth( chType );
const int maxLog2TrDynamicRange = sps.getMaxLog2TrDynamicRange( chType );
const int nomTransformShift = getTransformShift( channelBitDepth, area.size(), maxLog2TrDynamicRange );
const bool clipTransformShift = ( tu.mtsIdx==MTS_SKIP && sps.getSpsRangeExtension().getExtendedPrecisionProcessingFlag() );
const bool needsSqrt2ScaleAdjustment = TU::needsSqrt2Scale(tu, compID);
const int transformShift = ( clipTransformShift ? std::max<int>( 0, nomTransformShift ) : nomTransformShift ) + (needsSqrt2ScaleAdjustment?-1:0);
// quant parameters
m_QShift = QUANT_SHIFT - 1 + qpPer + transformShift;
m_QAdd = -( ( 3 << m_QShift ) >> 1 );
Intermediate_Int invShift = IQUANT_SHIFT + 1 - qpPer - transformShift;
m_QScale = g_quantScales[needsSqrt2ScaleAdjustment?1:0][ qpRem ];
const unsigned qIdxBD = std::min<unsigned>( maxLog2TrDynamicRange + 1, 8*sizeof(Intermediate_Int) + invShift - IQUANT_SHIFT - 1 );
m_maxQIdx = ( 1 << (qIdxBD-1) ) - 4;
#if JVET_O0256_ADJUST_THD_DEPQUANT
m_thresLast = TCoeff((int64_t(4) << m_QShift));
#else
m_thresLast = TCoeff((int64_t(3) << m_QShift));
#endif
m_thresSSbb = TCoeff((int64_t(3) << m_QShift));
// distortion calculation parameters
const int64_t qScale = (gValue==-1) ? m_QScale : gValue;
const int nomDShift =
SCALE_BITS - 2 * (nomTransformShift + DISTORTION_PRECISION_ADJUSTMENT(channelBitDepth)) + m_QShift + (needsSqrt2ScaleAdjustment ? 1 : 0);
const double qScale2 = double( qScale * qScale );
const double nomDistFactor = ( nomDShift < 0 ? 1.0/(double(int64_t(1)<<(-nomDShift))*qScale2*lambda) : double(int64_t(1)<<nomDShift)/(qScale2*lambda) );
const int64_t pow2dfShift = (int64_t)( nomDistFactor * qScale2 ) + 1;
const int dfShift = ceil_log2( pow2dfShift );
m_DistShift = 62 + m_QShift - 2*maxLog2TrDynamicRange - dfShift;
m_DistAdd = (int64_t(1) << m_DistShift) >> 1;
m_DistStepAdd = (int64_t)( nomDistFactor * double(int64_t(1)<<(m_DistShift+m_QShift)) + .5 );
m_DistOrgFact = (int64_t)( nomDistFactor * double(int64_t(1)<<(m_DistShift+1 )) + .5 );
}
void Quantizer::dequantBlock( const TransformUnit& tu, const ComponentID compID, const QpParam& cQP, CoeffBuf& recCoeff, bool enableScalingLists, int* piDequantCoef) const
{
//----- set basic parameters -----
const CompArea& area = tu.blocks[ compID ];
const int numCoeff = area.area();
const SizeType hsId = gp_sizeIdxInfo->idxFrom( area.width );
const SizeType vsId = gp_sizeIdxInfo->idxFrom( area.height );
const CoeffScanType scanType = SCAN_DIAG;
const ScanElement *scan = g_scanOrder[SCAN_GROUPED_4x4][scanType][hsId][vsId];
const TCoeff* qCoeff = tu.getCoeffs( compID ).buf;
TCoeff* tCoeff = recCoeff.buf;
//----- reset coefficients and get last scan index -----
::memset( tCoeff, 0, numCoeff * sizeof(TCoeff) );
int lastScanIdx = -1;
for( int scanIdx = numCoeff - 1; scanIdx >= 0; scanIdx-- )
{
if (qCoeff[scan[scanIdx].idx])
{
lastScanIdx = scanIdx;
break;
}
}
if( lastScanIdx < 0 )
{
return;
}
//----- set dequant parameters -----#if JVET_O0919_TS_MIN_QP
const int qpDQ = cQP.Qp(tu.mtsIdx==MTS_SKIP && isLuma(compID)) + 1;
#else
const int qpDQ = cQP.Qp + 1;
#endif
const int qpPer = qpDQ / 6;
const int qpRem = qpDQ - 6 * qpPer;
const SPS& sps = *tu.cs->sps;
const ChannelType chType = toChannelType( compID );
const int channelBitDepth = sps.getBitDepth( chType );
const int maxLog2TrDynamicRange = sps.getMaxLog2TrDynamicRange( chType );
const TCoeff minTCoeff = -( 1 << maxLog2TrDynamicRange );
const TCoeff maxTCoeff = ( 1 << maxLog2TrDynamicRange ) - 1;
const int nomTransformShift = getTransformShift( channelBitDepth, area.size(), maxLog2TrDynamicRange );
const bool clipTransformShift = ( tu.mtsIdx==MTS_SKIP && sps.getSpsRangeExtension().getExtendedPrecisionProcessingFlag() );
const bool needsSqrt2ScaleAdjustment = TU::needsSqrt2Scale(tu, compID);
const int transformShift = ( clipTransformShift ? std::max<int>( 0, nomTransformShift ) : nomTransformShift ) + (needsSqrt2ScaleAdjustment?-1:0);
Intermediate_Int shift = IQUANT_SHIFT + 1 - qpPer - transformShift + (enableScalingLists ? LOG2_SCALING_LIST_NEUTRAL_VALUE : 0);
Intermediate_Int invQScale = g_invQuantScales[needsSqrt2ScaleAdjustment?1:0][ qpRem ];
Intermediate_Int add = (shift < 0) ? 0 : ((1 << shift) >> 1);
//----- dequant coefficients -----
for( int state = 0, scanIdx = lastScanIdx; scanIdx >= 0; scanIdx-- )
{
const unsigned rasterPos = scan[scanIdx].idx;
const TCoeff& level = qCoeff[ rasterPos ];
if( level )
{
if (enableScalingLists)
invQScale = piDequantCoef[rasterPos];//scalingfactor*levelScale
if (shift < 0 && (enableScalingLists || scanIdx == lastScanIdx))
{
invQScale <<= -shift;
}
Intermediate_Int qIdx = ( level << 1 ) + ( level > 0 ? -(state>>1) : (state>>1) );
int64_t nomTCoeff = ((int64_t)qIdx * (int64_t)invQScale + add) >> ((shift < 0) ? 0 : shift);
tCoeff[rasterPos] = (TCoeff)Clip3<int64_t>(minTCoeff, maxTCoeff, nomTCoeff);
}
state = ( 32040 >> ((state<<2)+((level&1)<<1)) ) & 3; // the 16-bit value "32040" represent the state transition table
}
}
inline void Quantizer::preQuantCoeff(const TCoeff absCoeff, PQData *pqData, int quanCoeff) const
{
int64_t scaledOrg = int64_t( absCoeff ) * quanCoeff;
TCoeff qIdx = std::max<TCoeff>( 1, std::min<TCoeff>( m_maxQIdx, TCoeff( ( scaledOrg + m_QAdd ) >> m_QShift ) ) );
int64_t scaledAdd = qIdx * m_DistStepAdd - scaledOrg * m_DistOrgFact;
PQData& pq_a = pqData[ qIdx & 3 ];
pq_a.deltaDist = ( scaledAdd * qIdx + m_DistAdd ) >> m_DistShift;
pq_a.absLevel = ( ++qIdx ) >> 1;
scaledAdd += m_DistStepAdd;
PQData& pq_b = pqData[ qIdx & 3 ];
pq_b.deltaDist = ( scaledAdd * qIdx + m_DistAdd ) >> m_DistShift;
pq_b.absLevel = ( ++qIdx ) >> 1;
scaledAdd += m_DistStepAdd;
PQData& pq_c = pqData[ qIdx & 3 ];
pq_c.deltaDist = ( scaledAdd * qIdx + m_DistAdd ) >> m_DistShift;
pq_c.absLevel = ( ++qIdx ) >> 1;
scaledAdd += m_DistStepAdd;
PQData& pq_d = pqData[ qIdx & 3 ];
pq_d.deltaDist = ( scaledAdd * qIdx + m_DistAdd ) >> m_DistShift;
pq_d.absLevel = ( ++qIdx ) >> 1;
}
/*================================================================================*/ /*===== =====*/
/*===== T C Q S T A T E =====*/
/*===== =====*/
/*================================================================================*/
class State;
struct SbbCtx
{
uint8_t* sbbFlags;
uint8_t* levels;
};
class CommonCtx
{
public:
CommonCtx() : m_currSbbCtx( m_allSbbCtx ), m_prevSbbCtx( m_currSbbCtx + 4 ) {}
inline void swap() { std::swap(m_currSbbCtx, m_prevSbbCtx); }
inline void reset( const TUParameters& tuPars, const RateEstimator &rateEst)
{
m_nbInfo = tuPars.m_scanId2NbInfoOut;
::memcpy( m_sbbFlagBits, rateEst.sigSbbFracBits(), 2*sizeof(BinFracBits) );
const int numSbb = tuPars.m_numSbb;
const int chunkSize = numSbb + tuPars.m_numCoeff;
uint8_t* nextMem = m_memory;
for( int k = 0; k < 8; k++, nextMem += chunkSize )
{
m_allSbbCtx[k].sbbFlags = nextMem;
m_allSbbCtx[k].levels = nextMem + numSbb;
}
}
inline void update(const ScanInfo &scanInfo, const State *prevState, State &currState);
private:
const NbInfoOut* m_nbInfo;
BinFracBits m_sbbFlagBits[2];
SbbCtx m_allSbbCtx [8];
SbbCtx* m_currSbbCtx;
SbbCtx* m_prevSbbCtx;
uint8_t m_memory[ 8 * ( MAX_TB_SIZEY * MAX_TB_SIZEY + MLS_GRP_NUM ) ];
};
#define RICEMAX 32
const int32_t g_goRiceBits[4][RICEMAX] =
{
{ 32768, 65536, 98304, 131072, 163840, 196608, 262144, 262144, 327680, 327680, 327680, 327680, 393216, 393216, 393216, 393216, 393216, 393216, 393216, 393216, 458752, 458752, 458752, 458752, 458752, 458752, 458752, 458752, 458752, 458752, 458752, 458752},
{ 65536, 65536, 98304, 98304, 131072, 131072, 163840, 163840, 196608, 196608, 229376, 229376, 294912, 294912, 294912, 294912, 360448, 360448, 360448, 360448, 360448, 360448, 360448, 360448, 425984, 425984, 425984, 425984, 425984, 425984, 425984, 425984},
{ 98304, 98304, 98304, 98304, 131072, 131072, 131072, 131072, 163840, 163840, 163840, 163840, 196608, 196608, 196608, 196608, 229376, 229376, 229376, 229376, 262144, 262144, 262144, 262144, 327680, 327680, 327680, 327680, 327680, 327680, 327680, 327680},
{131072, 131072, 131072, 131072, 131072, 131072, 131072, 131072, 163840, 163840, 163840, 163840, 163840, 163840, 163840, 163840, 196608, 196608, 196608, 196608, 196608, 196608, 196608, 196608, 229376, 229376, 229376, 229376, 229376, 229376, 229376, 229376}
};
class State
{
friend class CommonCtx;
public:
State( const RateEstimator& rateEst, CommonCtx& commonCtx, const int stateId );
template<uint8_t numIPos>
inline void updateState(const ScanInfo &scanInfo, const State *prevStates, const Decision &decision);
inline void updateStateEOS(const ScanInfo &scanInfo, const State *prevStates, const State *skipStates,
const Decision &decision);
inline void init()
{
m_rdCost = std::numeric_limits<int64_t>::max()>>1;
m_numSigSbb = 0;
m_remRegBins = 4; // just large enough for last scan pos m_refSbbCtxId = -1;
m_sigFracBits = m_sigFracBitsArray[ 0 ];
m_coeffFracBits = m_gtxFracBitsArray[ 0 ];
m_goRicePar = 0;
m_goRiceZero = 0;
}
#if JVET_O0094_LFNST_ZERO_PRIM_COEFFS
void checkRdCosts( const ScanPosType spt, const PQData& pqDataA, const PQData& pqDataB, Decision& decisionA, Decision& decisionB ) const
#else
void checkRdCosts( const ScanPosType spt, const PQData& pqDataA, const PQData& pqDataB, Decision& decisionA, Decision& decisionB, bool zeroOut ) const
#endif
{
const int32_t* goRiceTab = g_goRiceBits[m_goRicePar];
int64_t rdCostA = m_rdCost + pqDataA.deltaDist;
int64_t rdCostB = m_rdCost + pqDataB.deltaDist;
int64_t rdCostZ = m_rdCost;
#if !JVET_O0094_LFNST_ZERO_PRIM_COEFFS
if( zeroOut )
{
rdCostZ = m_rdCost;
if( m_remRegBins >= 4 )
{
if( spt == SCAN_ISCSBB )
{
rdCostZ += m_sigFracBits.intBits[ 0 ];
}
else if( spt == SCAN_SOCSBB )
{
rdCostZ += m_sbbFracBits.intBits[ 1 ] + m_sigFracBits.intBits[ 0 ];
}
else if( m_numSigSbb )
{
rdCostZ += m_sigFracBits.intBits[ 0 ];
}
else
{
rdCostZ = decisionA.rdCost;
}
}
else
{
rdCostZ += goRiceTab[ m_goRiceZero ];
}
if( rdCostZ < decisionA.rdCost )
{
decisionA.rdCost = rdCostZ;
decisionA.absLevel = 0;
decisionA.prevId = m_stateId;
}
}
else
{
#endif
if( m_remRegBins >= 4 )
{
if( pqDataA.absLevel < 4 )
rdCostA += m_coeffFracBits.bits[ pqDataA.absLevel ];
else
{
const unsigned value = ( pqDataA.absLevel - 4 ) >> 1;
rdCostA += m_coeffFracBits.bits[ pqDataA.absLevel - ( value << 1 ) ] + goRiceTab[ value < RICEMAX ? value : RICEMAX - 1 ];
}
if( pqDataB.absLevel < 4 )
rdCostB += m_coeffFracBits.bits[ pqDataB.absLevel ];
else
{
const unsigned value = ( pqDataB.absLevel - 4 ) >> 1;
rdCostB += m_coeffFracBits.bits[ pqDataB.absLevel - ( value << 1 ) ] + goRiceTab[ value < RICEMAX ? value : RICEMAX - 1 ];
}
if( spt == SCAN_ISCSBB ) {
rdCostA += m_sigFracBits.intBits[ 1 ];
rdCostB += m_sigFracBits.intBits[ 1 ];
rdCostZ += m_sigFracBits.intBits[ 0 ];
}
else if( spt == SCAN_SOCSBB )
{
rdCostA += m_sbbFracBits.intBits[ 1 ] + m_sigFracBits.intBits[ 1 ];
rdCostB += m_sbbFracBits.intBits[ 1 ] + m_sigFracBits.intBits[ 1 ];
rdCostZ += m_sbbFracBits.intBits[ 1 ] + m_sigFracBits.intBits[ 0 ];
}
else if( m_numSigSbb )
{
rdCostA += m_sigFracBits.intBits[ 1 ];
rdCostB += m_sigFracBits.intBits[ 1 ];
rdCostZ += m_sigFracBits.intBits[ 0 ];
}
else
{
rdCostZ = decisionA.rdCost;
}
}
else
{
rdCostA += ( 1 << SCALE_BITS ) + goRiceTab[ pqDataA.absLevel <= m_goRiceZero ? pqDataA.absLevel - 1 : ( pqDataA.absLevel < RICEMAX ? pqDataA.absLevel : RICEMAX - 1 ) ];
rdCostB += ( 1 << SCALE_BITS ) + goRiceTab[ pqDataB.absLevel <= m_goRiceZero ? pqDataB.absLevel - 1 : ( pqDataB.absLevel < RICEMAX ? pqDataB.absLevel : RICEMAX - 1 ) ];
rdCostZ += goRiceTab[ m_goRiceZero ];
}
if( rdCostA < decisionA.rdCost )
{
decisionA.rdCost = rdCostA;
decisionA.absLevel = pqDataA.absLevel;
decisionA.prevId = m_stateId;
}
if( rdCostZ < decisionA.rdCost )
{
decisionA.rdCost = rdCostZ;
decisionA.absLevel = 0;
decisionA.prevId = m_stateId;
}
if( rdCostB < decisionB.rdCost )
{
decisionB.rdCost = rdCostB;
decisionB.absLevel = pqDataB.absLevel;
decisionB.prevId = m_stateId;
}
}
#if !JVET_O0094_LFNST_ZERO_PRIM_COEFFS
}
#endif
inline void checkRdCostStart(int32_t lastOffset, const PQData &pqData, Decision &decision) const
{
int64_t rdCost = pqData.deltaDist + lastOffset;
if (pqData.absLevel < 4)
{
rdCost += m_coeffFracBits.bits[pqData.absLevel];
}
else
{
const unsigned value = (pqData.absLevel - 4) >> 1;
rdCost += m_coeffFracBits.bits[pqData.absLevel - (value << 1)] + g_goRiceBits[m_goRicePar][value < RICEMAX ? value : RICEMAX-1];
}
if( rdCost < decision.rdCost )
{
decision.rdCost = rdCost;
decision.absLevel = pqData.absLevel;
decision.prevId = -1;
}
}
inline void checkRdCostSkipSbb(Decision &decision) const
{
int64_t rdCost = m_rdCost + m_sbbFracBits.intBits[0];
if( rdCost < decision.rdCost )
{
decision.rdCost = rdCost;
decision.absLevel = 0;
decision.prevId = 4+m_stateId;
}
}
inline void checkRdCostSkipSbbZeroOut(Decision &decision) const
{
int64_t rdCost = m_rdCost + m_sbbFracBits.intBits[0];
decision.rdCost = rdCost;
decision.absLevel = 0;
decision.prevId = 4 + m_stateId;
}
private:
int64_t m_rdCost;
uint16_t m_absLevelsAndCtxInit[24]; // 16x8bit for abs levels + 16x16bit for ctx init id
int8_t m_numSigSbb;
#if JVET_O0052_TU_LEVEL_CTX_CODED_BIN_CONSTRAINT
int m_remRegBins;
#else
int8_t m_remRegBins;
#endif
int8_t m_refSbbCtxId;
BinFracBits m_sbbFracBits;
BinFracBits m_sigFracBits;
CoeffFracBits m_coeffFracBits;
int8_t m_goRicePar;
int8_t m_goRiceZero;
const int8_t m_stateId;
const BinFracBits*const m_sigFracBitsArray;
const CoeffFracBits*const m_gtxFracBitsArray;
const uint32_t*const m_goRiceZeroArray;
CommonCtx& m_commonCtx;
#if JVET_O0052_TU_LEVEL_CTX_CODED_BIN_CONSTRAINT
public:
unsigned effWidth;
unsigned effHeight;
#endif
};
State::State( const RateEstimator& rateEst, CommonCtx& commonCtx, const int stateId )
: m_sbbFracBits { { 0, 0 } }
, m_stateId ( stateId )
, m_sigFracBitsArray( rateEst.sigFlagBits(stateId) )
, m_gtxFracBitsArray( rateEst.gtxFracBits(stateId) )
, m_goRiceZeroArray ( g_auiGoRicePosCoeff0[std::max(0,stateId-1)] )
, m_commonCtx ( commonCtx )
{
}
template<uint8_t numIPos>
inline void State::updateState(const ScanInfo &scanInfo, const State *prevStates, const Decision &decision)
{
m_rdCost = decision.rdCost;
if( decision.prevId > -2 )
{
if( decision.prevId >= 0 )
{
const State* prvState = prevStates + decision.prevId;
m_numSigSbb = prvState->m_numSigSbb + !!decision.absLevel;
m_refSbbCtxId = prvState->m_refSbbCtxId;
m_sbbFracBits = prvState->m_sbbFracBits; m_remRegBins = prvState->m_remRegBins - 1;
m_goRicePar = prvState->m_goRicePar;
if( m_remRegBins >= 4 )
{
m_remRegBins -= (decision.absLevel < 2 ? decision.absLevel : 3);
}
::memcpy( m_absLevelsAndCtxInit, prvState->m_absLevelsAndCtxInit, 48*sizeof(uint8_t) );
}
else
{
m_numSigSbb = 1;
m_refSbbCtxId = -1;
#if JVET_O0052_TU_LEVEL_CTX_CODED_BIN_CONSTRAINT
int ctxBinSampleRatio = (scanInfo.chType == CHANNEL_TYPE_LUMA) ? MAX_TU_LEVEL_CTX_CODED_BIN_CONSTRAINT_LUMA : MAX_TU_LEVEL_CTX_CODED_BIN_CONSTRAINT_CHROMA;
m_remRegBins = (effWidth * effHeight *ctxBinSampleRatio) / 16 - (decision.absLevel < 2 ? decision.absLevel : 3);
#else
if ( scanInfo.sbbSize == 4 )
{
m_remRegBins = MAX_NUM_REG_BINS_2x2SUBBLOCK - (decision.absLevel < 2 ? decision.absLevel : 3);
}
else
{
m_remRegBins = MAX_NUM_REG_BINS_4x4SUBBLOCK - (decision.absLevel < 2 ? decision.absLevel : 3);
}
#endif
::memset( m_absLevelsAndCtxInit, 0, 48*sizeof(uint8_t) );
}
uint8_t* levels = reinterpret_cast<uint8_t*>(m_absLevelsAndCtxInit);
levels[ scanInfo.insidePos ] = (uint8_t)std::min<TCoeff>( 255, decision.absLevel );
if (m_remRegBins >= 4)
{
TCoeff tinit = m_absLevelsAndCtxInit[8 + scanInfo.nextInsidePos];
TCoeff sumAbs1 = (tinit >> 3) & 31;
TCoeff sumNum = tinit & 7;
#define UPDATE(k) {TCoeff t=levels[scanInfo.nextNbInfoSbb.inPos[k]]; sumAbs1+=std::min<TCoeff>(4+(t&1),t); sumNum+=!!t; }
if (numIPos == 1)
{
UPDATE(0);
}
else if (numIPos == 2)
{
UPDATE(0);
UPDATE(1);
}
else if (numIPos == 3)
{
UPDATE(0);
UPDATE(1);
UPDATE(2);
}
else if (numIPos == 4)
{
UPDATE(0);
UPDATE(1);
UPDATE(2);
UPDATE(3);
}
else if (numIPos == 5)
{
UPDATE(0);
UPDATE(1);
UPDATE(2);
UPDATE(3);
UPDATE(4);
}
#undef UPDATE
TCoeff sumGt1 = sumAbs1 - sumNum;
#if JVET_O0617_SIG_FLAG_CONTEXT_REDUCTION m_sigFracBits = m_sigFracBitsArray[scanInfo.sigCtxOffsetNext + std::min( (sumAbs1+1)>>1, 3 )];
#else
m_sigFracBits = m_sigFracBitsArray[scanInfo.sigCtxOffsetNext + (sumAbs1 < 5 ? sumAbs1 : 5)];
#endif
m_coeffFracBits = m_gtxFracBitsArray[scanInfo.gtxCtxOffsetNext + (sumGt1 < 4 ? sumGt1 : 4)];
TCoeff sumAbs = m_absLevelsAndCtxInit[8 + scanInfo.nextInsidePos] >> 8;
#define UPDATE(k) {TCoeff t=levels[scanInfo.nextNbInfoSbb.inPos[k]]; sumAbs+=t; }
if (numIPos == 1)
{
UPDATE(0);
}
else if (numIPos == 2)
{
UPDATE(0);
UPDATE(1);
}
else if (numIPos == 3)
{
UPDATE(0);
UPDATE(1);
UPDATE(2);
}
else if (numIPos == 4)
{
UPDATE(0);
UPDATE(1);
UPDATE(2);
UPDATE(3);
}
else if (numIPos == 5)
{
UPDATE(0);
UPDATE(1);
UPDATE(2);
UPDATE(3);
UPDATE(4);
}
#undef UPDATE
int sumAll = std::max(std::min(31, (int)sumAbs - 4 * 5), 0);
m_goRicePar = g_auiGoRiceParsCoeff[sumAll];
}
else
{
TCoeff sumAbs = m_absLevelsAndCtxInit[8 + scanInfo.nextInsidePos] >> 8;
#define UPDATE(k) {TCoeff t=levels[scanInfo.nextNbInfoSbb.inPos[k]]; sumAbs+=t; }
if (numIPos == 1)
{
UPDATE(0);
}
else if (numIPos == 2)
{
UPDATE(0);
UPDATE(1);
}
else if (numIPos == 3)
{
UPDATE(0);
UPDATE(1);
UPDATE(2);
}
else if (numIPos == 4)
{
UPDATE(0);
UPDATE(1);
UPDATE(2);
UPDATE(3);
}
else if (numIPos == 5)
{ UPDATE(0);
UPDATE(1);
UPDATE(2);
UPDATE(3);
UPDATE(4);
}
#undef UPDATE
sumAbs = std::min<TCoeff>(31, sumAbs);
m_goRicePar = g_auiGoRiceParsCoeff[sumAbs];
m_goRiceZero = m_goRiceZeroArray[sumAbs];
}
}
}
inline void State::updateStateEOS(const ScanInfo &scanInfo, const State *prevStates, const State *skipStates,
const Decision &decision)
{
m_rdCost = decision.rdCost;
if( decision.prevId > -2 )
{
const State* prvState = 0;
if( decision.prevId >= 4 )
{
CHECK( decision.absLevel != 0, "cannot happen" );
prvState = skipStates + ( decision.prevId - 4 );
m_numSigSbb = 0;
::memset( m_absLevelsAndCtxInit, 0, 16*sizeof(uint8_t) );
}
else if( decision.prevId >= 0 )
{
prvState = prevStates + decision.prevId;
m_numSigSbb = prvState->m_numSigSbb + !!decision.absLevel;
::memcpy( m_absLevelsAndCtxInit, prvState->m_absLevelsAndCtxInit, 16*sizeof(uint8_t) );
}
else
{
m_numSigSbb = 1;
::memset( m_absLevelsAndCtxInit, 0, 16*sizeof(uint8_t) );
}
reinterpret_cast<uint8_t*>(m_absLevelsAndCtxInit)[ scanInfo.insidePos ] = (uint8_t)std::min<TCoeff>( 255, decision.absLevel );
m_commonCtx.update( scanInfo, prvState, *this );
TCoeff tinit = m_absLevelsAndCtxInit[ 8 + scanInfo.nextInsidePos ];
TCoeff sumNum = tinit & 7;
TCoeff sumAbs1 = ( tinit >> 3 ) & 31;
TCoeff sumGt1 = sumAbs1 - sumNum;
#if JVET_O0617_SIG_FLAG_CONTEXT_REDUCTION
m_sigFracBits = m_sigFracBitsArray[ scanInfo.sigCtxOffsetNext + std::min( (sumAbs1+1)>>1, 3 ) ];
#else
m_sigFracBits = m_sigFracBitsArray[ scanInfo.sigCtxOffsetNext + ( sumAbs1 < 5 ? sumAbs1 : 5 ) ];
#endif
m_coeffFracBits = m_gtxFracBitsArray[ scanInfo.gtxCtxOffsetNext + ( sumGt1 < 4 ? sumGt1 : 4 ) ];
}
}
inline void CommonCtx::update(const ScanInfo &scanInfo, const State *prevState, State &currState)
{
uint8_t* sbbFlags = m_currSbbCtx[ currState.m_stateId ].sbbFlags;
uint8_t* levels = m_currSbbCtx[ currState.m_stateId ].levels;
std::size_t setCpSize = m_nbInfo[ scanInfo.scanIdx - 1 ].maxDist * sizeof(uint8_t);
if( prevState && prevState->m_refSbbCtxId >= 0 )
{
::memcpy( sbbFlags, m_prevSbbCtx[prevState->m_refSbbCtxId].sbbFlags, scanInfo.numSbb*sizeof(uint8_t) );
::memcpy( levels + scanInfo.scanIdx, m_prevSbbCtx[prevState->m_refSbbCtxId].levels + scanInfo.scanIdx, setCpSize );
}
else
{
::memset( sbbFlags, 0, scanInfo.numSbb*sizeof(uint8_t) );
::memset( levels + scanInfo.scanIdx, 0, setCpSize ); }
sbbFlags[ scanInfo.sbbPos ] = !!currState.m_numSigSbb;
::memcpy( levels + scanInfo.scanIdx, currState.m_absLevelsAndCtxInit, scanInfo.sbbSize*sizeof(uint8_t) );
const int sigNSbb = ( ( scanInfo.nextSbbRight ? sbbFlags[ scanInfo.nextSbbRight ] : false ) || ( scanInfo.nextSbbBelow ? sbbFlags[ scanInfo.nextSbbBelow ] : false ) ? 1 : 0 );
currState.m_numSigSbb = 0;
#if JVET_O0052_TU_LEVEL_CTX_CODED_BIN_CONSTRAINT
if (prevState)
{
currState.m_remRegBins = prevState->m_remRegBins;
}
else
{
int ctxBinSampleRatio = (scanInfo.chType == CHANNEL_TYPE_LUMA) ? MAX_TU_LEVEL_CTX_CODED_BIN_CONSTRAINT_LUMA : MAX_TU_LEVEL_CTX_CODED_BIN_CONSTRAINT_CHROMA;
currState.m_remRegBins = (currState.effWidth * currState.effHeight *ctxBinSampleRatio) / 16;
}
#else
if (scanInfo.sbbSize == 4)
{
currState.m_remRegBins = MAX_NUM_REG_BINS_2x2SUBBLOCK;
}
else
{
currState.m_remRegBins = MAX_NUM_REG_BINS_4x4SUBBLOCK;
}
#endif
currState.m_goRicePar = 0;
currState.m_refSbbCtxId = currState.m_stateId;
currState.m_sbbFracBits = m_sbbFlagBits[ sigNSbb ];
uint16_t templateCtxInit[16];
const int scanBeg = scanInfo.scanIdx - scanInfo.sbbSize;
const NbInfoOut* nbOut = m_nbInfo + scanBeg;
const uint8_t* absLevels = levels + scanBeg;
for( int id = 0; id < scanInfo.sbbSize; id++, nbOut++ )
{
if( nbOut->num )
{
TCoeff sumAbs = 0, sumAbs1 = 0, sumNum = 0;
#define UPDATE(k) {TCoeff t=absLevels[nbOut->outPos[k]]; sumAbs+=t; sumAbs1+=std::min<TCoeff>(4+(t&1),t); sumNum+=!!t; }
UPDATE(0);
if( nbOut->num > 1 )
{
UPDATE(1);
if( nbOut->num > 2 )
{
UPDATE(2);
if( nbOut->num > 3 )
{
UPDATE(3);
if( nbOut->num > 4 )
{
UPDATE(4);
}
}
}
}
#undef UPDATE
templateCtxInit[id] = uint16_t(sumNum) + ( uint16_t(sumAbs1) << 3 ) + ( (uint16_t)std::min<TCoeff>( 127, sumAbs ) << 8 );
}
else
{
templateCtxInit[id] = 0;
}
}
::memset( currState.m_absLevelsAndCtxInit, 0, 16*sizeof(uint8_t) );
::memcpy( currState.m_absLevelsAndCtxInit + 8, templateCtxInit, 16*sizeof(uint16_t) );
}
/*================================================================================*/
/*===== =====*/
/*===== T C Q =====*/
/*===== =====*/
/*================================================================================*/
class DepQuant : private RateEstimator
{
public:
DepQuant();
void quant ( TransformUnit& tu, const CCoeffBuf& srcCoeff, const ComponentID compID, const QpParam& cQP, const double lambda, const Ctx& ctx, TCoeff& absSum, bool enableScalingLists, int* quantCoeff );
void dequant ( const TransformUnit& tu, CoeffBuf& recCoeff, const ComponentID compID, const QpParam& cQP, bool enableScalingLists, int* quantCoeff );
private:
void xDecideAndUpdate ( const TCoeff absCoeff, const ScanInfo& scanInfo, bool zeroOut, int quantCoeff);
void xDecide ( const ScanPosType spt, const TCoeff absCoeff, const int lastOffset, Decision* decisions, bool zeroOut, int quantCoeff );
private:
CommonCtx m_commonCtx;
State m_allStates[ 12 ];
State* m_currStates;
State* m_prevStates;
State* m_skipStates;
State m_startState;
Quantizer m_quant;
Decision m_trellis[ MAX_TB_SIZEY * MAX_TB_SIZEY ][ 8 ];
};
#define TINIT(x) {*this,m_commonCtx,x}
DepQuant::DepQuant()
: RateEstimator ()
, m_commonCtx ()
, m_allStates {TINIT(0),TINIT(1),TINIT(2),TINIT(3),TINIT(0),TINIT(1),TINIT(2),TINIT(3),TINIT(0),TINIT(1),TINIT(2),TINIT(3)}
, m_currStates ( m_allStates )
, m_prevStates ( m_currStates + 4 )
, m_skipStates ( m_prevStates + 4 )
, m_startState TINIT(0)
{}
#undef TINIT
void DepQuant::dequant( const TransformUnit& tu, CoeffBuf& recCoeff, const ComponentID compID, const QpParam& cQP, bool enableScalingLists, int* piDequantCoef )
{
m_quant.dequantBlock( tu, compID, cQP, recCoeff, enableScalingLists, piDequantCoef );
}
#define DINIT(l,p) {std::numeric_limits<int64_t>::max()>>2,l,p}
static const Decision startDec[8] = {DINIT(-1,-2),DINIT(-1,-2),DINIT(-1,-2),DINIT(-1,-2),DINIT(0,4),DINIT(0,5),DINIT(0,6),DINIT(0,7)};
#undef DINIT
void DepQuant::xDecide( const ScanPosType spt, const TCoeff absCoeff, const int lastOffset, Decision* decisions, bool zeroOut, int quanCoeff)
{
::memcpy( decisions, startDec, 8*sizeof(Decision) );
#if JVET_O0094_LFNST_ZERO_PRIM_COEFFS
if( zeroOut )
{
if( spt==SCAN_EOCSBB )
{
m_skipStates[0].checkRdCostSkipSbbZeroOut( decisions[0] );
m_skipStates[1].checkRdCostSkipSbbZeroOut( decisions[1] );
m_skipStates[2].checkRdCostSkipSbbZeroOut( decisions[2] );
m_skipStates[3].checkRdCostSkipSbbZeroOut( decisions[3] );
}
return;
}#endif
PQData pqData[4];
m_quant.preQuantCoeff( absCoeff, pqData, quanCoeff );
#if JVET_O0094_LFNST_ZERO_PRIM_COEFFS
m_prevStates[0].checkRdCosts( spt, pqData[0], pqData[2], decisions[0], decisions[2]);
m_prevStates[1].checkRdCosts( spt, pqData[0], pqData[2], decisions[2], decisions[0]);
m_prevStates[2].checkRdCosts( spt, pqData[3], pqData[1], decisions[1], decisions[3]);
m_prevStates[3].checkRdCosts( spt, pqData[3], pqData[1], decisions[3], decisions[1]);
#else
m_prevStates[0].checkRdCosts( spt, pqData[0], pqData[2], decisions[0], decisions[2], zeroOut );
m_prevStates[1].checkRdCosts( spt, pqData[0], pqData[2], decisions[2], decisions[0], zeroOut );
m_prevStates[2].checkRdCosts( spt, pqData[3], pqData[1], decisions[1], decisions[3], zeroOut );
m_prevStates[3].checkRdCosts( spt, pqData[3], pqData[1], decisions[3], decisions[1], zeroOut );
#endif
if( spt==SCAN_EOCSBB )
{
#if !JVET_O0094_LFNST_ZERO_PRIM_COEFFS
if( zeroOut )
{
m_skipStates[0].checkRdCostSkipSbbZeroOut( decisions[0] );
m_skipStates[1].checkRdCostSkipSbbZeroOut( decisions[1] );
m_skipStates[2].checkRdCostSkipSbbZeroOut( decisions[2] );
m_skipStates[3].checkRdCostSkipSbbZeroOut( decisions[3] );
}
else
{
#endif
m_skipStates[0].checkRdCostSkipSbb( decisions[0] );
m_skipStates[1].checkRdCostSkipSbb( decisions[1] );
m_skipStates[2].checkRdCostSkipSbb( decisions[2] );
m_skipStates[3].checkRdCostSkipSbb( decisions[3] );
#if !JVET_O0094_LFNST_ZERO_PRIM_COEFFS
}
#endif
}
#if !JVET_O0094_LFNST_ZERO_PRIM_COEFFS
if( !zeroOut )
{
#endif
m_startState.checkRdCostStart( lastOffset, pqData[0], decisions[0] );
m_startState.checkRdCostStart( lastOffset, pqData[2], decisions[2] );
#if !JVET_O0094_LFNST_ZERO_PRIM_COEFFS
}
#endif
}
void DepQuant::xDecideAndUpdate( const TCoeff absCoeff, const ScanInfo& scanInfo, bool zeroOut, int quantCoeff )
{
Decision* decisions = m_trellis[ scanInfo.scanIdx ];
std::swap( m_prevStates, m_currStates );
xDecide( scanInfo.spt, absCoeff, lastOffset(scanInfo.scanIdx), decisions, zeroOut, quantCoeff );
if( scanInfo.scanIdx )
{
if( scanInfo.eosbb )
{
m_commonCtx.swap();
m_currStates[0].updateStateEOS( scanInfo, m_prevStates, m_skipStates, decisions[0] );
m_currStates[1].updateStateEOS( scanInfo, m_prevStates, m_skipStates, decisions[1] );
m_currStates[2].updateStateEOS( scanInfo, m_prevStates, m_skipStates, decisions[2] );
m_currStates[3].updateStateEOS( scanInfo, m_prevStates, m_skipStates, decisions[3] );
::memcpy( decisions+4, decisions, 4*sizeof(Decision) );
}
#if JVET_O0094_LFNST_ZERO_PRIM_COEFFS
else if( !zeroOut )
#else else
#endif
{
switch( scanInfo.nextNbInfoSbb.num )
{
case 0:
m_currStates[0].updateState<0>( scanInfo, m_prevStates, decisions[0] );
m_currStates[1].updateState<0>( scanInfo, m_prevStates, decisions[1] );
m_currStates[2].updateState<0>( scanInfo, m_prevStates, decisions[2] );
m_currStates[3].updateState<0>( scanInfo, m_prevStates, decisions[3] );
break;
case 1:
m_currStates[0].updateState<1>( scanInfo, m_prevStates, decisions[0] );
m_currStates[1].updateState<1>( scanInfo, m_prevStates, decisions[1] );
m_currStates[2].updateState<1>( scanInfo, m_prevStates, decisions[2] );
m_currStates[3].updateState<1>( scanInfo, m_prevStates, decisions[3] );
break;
case 2:
m_currStates[0].updateState<2>( scanInfo, m_prevStates, decisions[0] );
m_currStates[1].updateState<2>( scanInfo, m_prevStates, decisions[1] );
m_currStates[2].updateState<2>( scanInfo, m_prevStates, decisions[2] );
m_currStates[3].updateState<2>( scanInfo, m_prevStates, decisions[3] );
break;
case 3:
m_currStates[0].updateState<3>( scanInfo, m_prevStates, decisions[0] );
m_currStates[1].updateState<3>( scanInfo, m_prevStates, decisions[1] );
m_currStates[2].updateState<3>( scanInfo, m_prevStates, decisions[2] );
m_currStates[3].updateState<3>( scanInfo, m_prevStates, decisions[3] );
break;
case 4:
m_currStates[0].updateState<4>( scanInfo, m_prevStates, decisions[0] );
m_currStates[1].updateState<4>( scanInfo, m_prevStates, decisions[1] );
m_currStates[2].updateState<4>( scanInfo, m_prevStates, decisions[2] );
m_currStates[3].updateState<4>( scanInfo, m_prevStates, decisions[3] );
break;
default:
m_currStates[0].updateState<5>( scanInfo, m_prevStates, decisions[0] );
m_currStates[1].updateState<5>( scanInfo, m_prevStates, decisions[1] );
m_currStates[2].updateState<5>( scanInfo, m_prevStates, decisions[2] );
m_currStates[3].updateState<5>( scanInfo, m_prevStates, decisions[3] );
}
}
if( scanInfo.spt == SCAN_SOCSBB )
{
std::swap( m_prevStates, m_skipStates );
}
}
}
void DepQuant::quant( TransformUnit& tu, const CCoeffBuf& srcCoeff, const ComponentID compID, const QpParam& cQP, const double lambda, const Ctx& ctx, TCoeff& absSum, bool enableScalingLists, int* quantCoeff )
{
CHECKD( tu.cs->sps->getSpsRangeExtension().getExtendedPrecisionProcessingFlag(), "ext precision is not supported" );
//===== reset / pre-init =====
const TUParameters& tuPars = *g_Rom.getTUPars( tu.blocks[compID], compID );
m_quant.initQuantBlock ( tu, compID, cQP, lambda );
TCoeff* qCoeff = tu.getCoeffs( compID ).buf;
const TCoeff* tCoeff = srcCoeff.buf;
const int numCoeff = tu.blocks[compID].area();
::memset( tu.getCoeffs( compID ).buf, 0x00, numCoeff*sizeof(TCoeff) );
absSum = 0;
const CompArea& area = tu.blocks[ compID ];
const uint32_t width = area.width;
const uint32_t height = area.height;
const uint32_t lfnstIdx = tu.cu->lfnstIdx;
//===== scaling matrix ====
//const int qpDQ = cQP.Qp + 1; //const int qpPer = qpDQ / 6;
//const int qpRem = qpDQ - 6 * qpPer;
//TCoeff thresTmp = thres;
bool zeroOut = false;
bool zeroOutforThres = false;
int effWidth = tuPars.m_width, effHeight = tuPars.m_height;
#if JVET_O0538_SPS_CONTROL_ISP_SBT
if( ( tu.mtsIdx > MTS_SKIP || ( tu.cs->sps->getUseMTS() && tu.cu->sbtInfo != 0 && tuPars.m_height <= 32 && tuPars.m_width <= 32 ) ) && !tu.cu->transQuantBypass && compID == COMPONENT_Y )
#else
if ((tu.mtsIdx > MTS_SKIP || (tu.cu->sbtInfo != 0 && tuPars.m_height <= 32 && tuPars.m_width <= 32)) && !tu.cu->transQuantBypass && compID == COMPONENT_Y)
#endif
{
effHeight = (tuPars.m_height == 32) ? 16 : tuPars.m_height;
effWidth = (tuPars.m_width == 32) ? 16 : tuPars.m_width;
zeroOut = (effHeight < tuPars.m_height || effWidth < tuPars.m_width);
}
zeroOutforThres = zeroOut || (32 < tuPars.m_height || 32 < tuPars.m_width);
//===== find first test position =====
int firstTestPos = numCoeff - 1;
#if JVET_O0094_LFNST_ZERO_PRIM_COEFFS
if( lfnstIdx > 0 && tu.mtsIdx != MTS_SKIP && width >= 4 && height >= 4 )
{
firstTestPos = ( ( width == 4 && height == 4 ) || ( width == 8 && height == 8 ) ) ? 7 : 15 ;
}
#else
if( lfnstIdx > 0 && tu.mtsIdx != MTS_SKIP && ( ( width == 4 && height == 4 ) || ( width == 8 && height == 8 ) ) )
{
firstTestPos = 7;
}
#endif
const TCoeff defaultQuantisationCoefficient = (TCoeff)m_quant.getQScale();
const TCoeff thres = m_quant.getLastThreshold();
for( ; firstTestPos >= 0; firstTestPos-- )
{
if (zeroOutforThres && (tuPars.m_scanId2BlkPos[firstTestPos].x >= ((tuPars.m_width == 32 && zeroOut) ? 16 : 32)
|| tuPars.m_scanId2BlkPos[firstTestPos].y >= ((tuPars.m_height == 32 && zeroOut) ? 16 : 32)))
continue;
TCoeff thresTmp = (enableScalingLists) ? TCoeff(thres / (4 * quantCoeff[tuPars.m_scanId2BlkPos[firstTestPos].idx]))
: TCoeff(thres / (4 * defaultQuantisationCoefficient));
if (abs(tCoeff[tuPars.m_scanId2BlkPos[firstTestPos].idx]) > thresTmp)
{
break;
}
}
if( firstTestPos < 0 )
{
return;
}
//===== real init =====
RateEstimator::initCtx( tuPars, tu, compID, ctx.getFracBitsAcess() );
m_commonCtx.reset( tuPars, *this );
for( int k = 0; k < 12; k++ )
{
m_allStates[k].init();
}
m_startState.init();
#if JVET_O0052_TU_LEVEL_CTX_CODED_BIN_CONSTRAINT
int effectWidth = std::min(32, effWidth);
int effectHeight = std::min(32, effHeight);
for (int k = 0; k < 12; k++)
{
m_allStates[k].effWidth = effectWidth;
m_allStates[k].effHeight = effectHeight;
}
m_startState.effWidth = effectWidth; m_startState.effHeight = effectHeight;
#endif
//===== populate trellis =====
for( int scanIdx = firstTestPos; scanIdx >= 0; scanIdx-- )
{
const ScanInfo& scanInfo = tuPars.m_scanInfo[ scanIdx ];
#if !JVET_O0094_LFNST_ZERO_PRIM_COEFFS
bool lfnstZeroOut = lfnstIdx > 0 && tu.mtsIdx != MTS_SKIP && width >= 4 && height >= 4 &&
( ( ( ( width >= 8 && height >= 8 ) && scanIdx >= 16 ) || ( ( ( width == 4 && height == 4 ) || ( width == 8 && height == 8 ) ) && scanIdx >= 8 ) ) && scanIdx < 48 );
if (enableScalingLists)
{
m_quant.initQuantBlock(tu, compID, cQP, lambda, quantCoeff[scanInfo.rasterPos]);
xDecideAndUpdate( abs( tCoeff[scanInfo.rasterPos]), scanInfo, (zeroOut && (scanInfo.posX >= effWidth || scanInfo.posY >= effHeight)) || lfnstZeroOut, quantCoeff[scanInfo.rasterPos] );
}
else
xDecideAndUpdate( abs( tCoeff[scanInfo.rasterPos]), scanInfo, (zeroOut && (scanInfo.posX >= effWidth || scanInfo.posY >= effHeight)) || lfnstZeroOut, defaultQuantisationCoefficient );
#else
if (enableScalingLists)
{
m_quant.initQuantBlock(tu, compID, cQP, lambda, quantCoeff[scanInfo.rasterPos]);
xDecideAndUpdate( abs( tCoeff[scanInfo.rasterPos]), scanInfo, (zeroOut && (scanInfo.posX >= effWidth || scanInfo.posY >= effHeight)), quantCoeff[scanInfo.rasterPos] );
}
else
xDecideAndUpdate( abs( tCoeff[scanInfo.rasterPos]), scanInfo, (zeroOut && (scanInfo.posX >= effWidth || scanInfo.posY >= effHeight)), defaultQuantisationCoefficient );
#endif
}
//===== find best path =====
Decision decision = { std::numeric_limits<int64_t>::max(), -1, -2 };
int64_t minPathCost = 0;
for( int8_t stateId = 0; stateId < 4; stateId++ )
{
int64_t pathCost = m_trellis[0][stateId].rdCost;
if( pathCost < minPathCost )
{
decision.prevId = stateId;
minPathCost = pathCost;
}
}
//===== backward scanning =====
int scanIdx = 0;
for( ; decision.prevId >= 0; scanIdx++ )
{
decision = m_trellis[ scanIdx ][ decision.prevId ];
int32_t blkpos = tuPars.m_scanId2BlkPos[scanIdx].idx;
qCoeff[ blkpos ] = ( tCoeff[ blkpos ] < 0 ? -decision.absLevel : decision.absLevel );
absSum += decision.absLevel;
}
}
}; // namespace DQIntern
//===== interface class =====
DepQuant::DepQuant( const Quant* other, bool enc ) : QuantRDOQ( other )
{
const DepQuant* dq = dynamic_cast<const DepQuant*>( other );
CHECK( other && !dq, "The DepQuant cast must be successfull!" );
p = new DQIntern::DepQuant();
if( enc )
{
DQIntern::g_Rom.init();
}
}
DepQuant::~DepQuant(){
delete static_cast<DQIntern::DepQuant*>(p);
}
void DepQuant::quant( TransformUnit &tu, const ComponentID &compID, const CCoeffBuf &pSrc, TCoeff &uiAbsSum, const QpParam &cQP, const Ctx& ctx )
{
if( tu.cs->slice->getDepQuantEnabledFlag() && (tu.mtsIdx != MTS_SKIP || !isLuma(compID)) )
{
//===== scaling matrix ====
#if JVET_O0919_TS_MIN_QP
const int qpDQ = cQP.Qp(tu.mtsIdx==MTS_SKIP && isLuma(compID)) + 1;
#else
const int qpDQ = cQP.Qp + 1;
#endif
const int qpPer = qpDQ / 6;
const int qpRem = qpDQ - 6 * qpPer;
const CompArea &rect = tu.blocks[compID];
const int width = rect.width;
const int height = rect.height;
uint32_t scalingListType = getScalingListType(tu.cu->predMode, compID);
CHECK(scalingListType >= SCALING_LIST_NUM, "Invalid scaling list");
const uint32_t log2TrWidth = floorLog2(width);
const uint32_t log2TrHeight = floorLog2(height);
const bool enableScalingLists = getUseScalingList(width, height, (tu.mtsIdx == MTS_SKIP && isLuma(compID)));
static_cast<DQIntern::DepQuant*>(p)->quant( tu, pSrc, compID, cQP, Quant::m_dLambda, ctx, uiAbsSum, enableScalingLists, Quant::getQuantCoeff(scalingListType, qpRem, log2TrWidth, log2TrHeight) );
}
else
{
QuantRDOQ::quant( tu, compID, pSrc, uiAbsSum, cQP, ctx );
}
}
void DepQuant::dequant( const TransformUnit &tu, CoeffBuf &dstCoeff, const ComponentID &compID, const QpParam &cQP )
{
if( tu.cs->slice->getDepQuantEnabledFlag() && (tu.mtsIdx != MTS_SKIP || !isLuma(compID)) )
{
#if JVET_O0919_TS_MIN_QP
const int qpDQ = cQP.Qp(tu.mtsIdx==MTS_SKIP && isLuma(compID)) + 1;
#else
const int qpDQ = cQP.Qp + 1;
#endif
const int qpPer = qpDQ / 6;
const int qpRem = qpDQ - 6 * qpPer;
const CompArea &rect = tu.blocks[compID];
const int width = rect.width;
const int height = rect.height;
uint32_t scalingListType = getScalingListType(tu.cu->predMode, compID);
CHECK(scalingListType >= SCALING_LIST_NUM, "Invalid scaling list");
const uint32_t log2TrWidth = floorLog2(width);
const uint32_t log2TrHeight = floorLog2(height);
const bool enableScalingLists = getUseScalingList(width, height, (tu.mtsIdx == MTS_SKIP && isLuma(compID)));
static_cast<DQIntern::DepQuant*>(p)->dequant( tu, dstCoeff, compID, cQP, enableScalingLists, Quant::getDequantCoeff(scalingListType, qpRem, log2TrWidth, log2TrHeight) );
}
else
{
QuantRDOQ::dequant( tu, dstCoeff, compID, cQP );
}
}