/* 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) 2010-2020, 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.
*/
/** \file TrQuant.cpp
\brief transform and quantization class
*/
#include "TrQuant.h"
#include "TrQuant_EMT.h"
#include "UnitTools.h"
#include "ContextModelling.h"
#include "CodingStructure.h"
#include "CrossCompPrediction.h"
#include "dtrace_buffer.h"
#include <stdlib.h>
#include <limits>
#include <memory.h>
#include "QuantRDOQ.h"
#include "DepQuant.h"
#if RExt__DECODER_DEBUG_TOOL_STATISTICS
#include "CommonLib/CodingStatistics.h"
#endif
struct coeffGroupRDStats
{
int iNNZbeforePos0;
double d64CodedLevelandDist; // distortion and level cost only
double d64UncodedDist; // all zero coded block distortion
double d64SigCost;
double d64SigCost_0;
};
FwdTrans *fastFwdTrans[NUM_TRANS_TYPE][g_numTransformMatrixSizes] =
{
{ fastForwardDCT2_B2, fastForwardDCT2_B4, fastForwardDCT2_B8, fastForwardDCT2_B16, fastForwardDCT2_B32, fastForwardDCT2_B64 },
{ nullptr, fastForwardDCT8_B4, fastForwardDCT8_B8, fastForwardDCT8_B16, fastForwardDCT8_B32, nullptr },
{ nullptr, fastForwardDST7_B4, fastForwardDST7_B8, fastForwardDST7_B16, fastForwardDST7_B32, nullptr },
};
InvTrans *fastInvTrans[NUM_TRANS_TYPE][g_numTransformMatrixSizes] =
{
{ fastInverseDCT2_B2, fastInverseDCT2_B4, fastInverseDCT2_B8, fastInverseDCT2_B16, fastInverseDCT2_B32, fastInverseDCT2_B64 },
{ nullptr, fastInverseDCT8_B4, fastInverseDCT8_B8, fastInverseDCT8_B16, fastInverseDCT8_B32, nullptr },
{ nullptr, fastInverseDST7_B4, fastInverseDST7_B8, fastInverseDST7_B16, fastInverseDST7_B32, nullptr },
};
//! \ingroup CommonLib
//! \{
static inline int64_t square( const int d ) { return d * (int64_t)d; }
template<int signedMode> std::pair<int64_t,int64_t> fwdTransformCbCr( const PelBuf &resCb, const PelBuf &resCr, PelBuf& resC1, PelBuf& resC2 )
{
const Pel* cb = resCb.buf;
const Pel* cr = resCr.buf;
Pel* c1 = resC1.buf;
Pel* c2 = resC2.buf;
int64_t d1 = 0;
int64_t d2 = 0;
for( SizeType y = 0; y < resCb.height; y++, cb += resCb.stride, cr += resCr.stride, c1 += resC1.stride, c2 += resC2.stride )
{
for( SizeType x = 0; x < resCb.width; x++ )
{
int cbx = cb[x], crx = cr[x];
if ( signedMode == 1 )
{
c1[x] = Pel( ( 4*cbx + 2*crx ) / 5 );
d1 += square( cbx - c1[x] ) + square( crx - (c1[x]>>1) );
}
else if ( signedMode == -1 )
{
c1[x] = Pel( ( 4*cbx - 2*crx ) / 5 );
d1 += square( cbx - c1[x] ) + square( crx - (-c1[x]>>1) );
}
else if ( signedMode == 2 )
{
c1[x] = Pel( ( cbx + crx ) / 2 );
d1 += square( cbx - c1[x] ) + square( crx - c1[x] );
}
else if ( signedMode == -2 )
{
c1[x] = Pel( ( cbx - crx ) / 2 );
d1 += square( cbx - c1[x] ) + square( crx + c1[x] );
}
else if ( signedMode == 3 )
{
c2[x] = Pel( ( 4*crx + 2*cbx ) / 5 );
d1 += square( cbx - (c2[x]>>1) ) + square( crx - c2[x] );
}
else if ( signedMode == -3 )
{
c2[x] = Pel( ( 4*crx - 2*cbx ) / 5 );
d1 += square( cbx - (-c2[x]>>1) ) + square( crx - c2[x] );
}
else
{
d1 += square( cbx );
d2 += square( crx );
}
}
}
return std::make_pair(d1,d2);
}
template<int signedMode> void invTransformCbCr( PelBuf &resCb, PelBuf &resCr )
{
Pel* cb = resCb.buf;
Pel* cr = resCr.buf;
for( SizeType y = 0; y < resCb.height; y++, cb += resCb.stride, cr += resCr.stride )
{
for( SizeType x = 0; x < resCb.width; x++ )
{
if ( signedMode == 1 ) { cr[x] = cb[x] >> 1; }
else if ( signedMode == -1 ) { cr[x] = -cb[x] >> 1; }
else if ( signedMode == 2 ) { cr[x] = cb[x]; }
else if ( signedMode == -2 ) { cr[x] = (cb[x] == -32768 && sizeof(Pel) == 2) ? 32767 : -cb[x]; } // non-normative clipping to prevent 16-bit overflow
else if ( signedMode == 3 ) { cb[x] = cr[x] >> 1; }
else if ( signedMode == -3 ) { cb[x] = -cr[x] >> 1; }
}
}
}
// ====================================================================================================================
// TrQuant class member functions
// ====================================================================================================================
TrQuant::TrQuant() : m_quant( nullptr )
{
// allocate temporary buffers
{
m_invICT = m_invICTMem + maxAbsIctMode;
m_invICT[ 0] = invTransformCbCr< 0>;
m_invICT[ 1] = invTransformCbCr< 1>;
m_invICT[-1] = invTransformCbCr<-1>;
m_invICT[ 2] = invTransformCbCr< 2>;
m_invICT[-2] = invTransformCbCr<-2>;
m_invICT[ 3] = invTransformCbCr< 3>;
m_invICT[-3] = invTransformCbCr<-3>;
m_fwdICT = m_fwdICTMem + maxAbsIctMode;
m_fwdICT[ 0] = fwdTransformCbCr< 0>;
m_fwdICT[ 1] = fwdTransformCbCr< 1>;
m_fwdICT[-1] = fwdTransformCbCr<-1>;
m_fwdICT[ 2] = fwdTransformCbCr< 2>;
m_fwdICT[-2] = fwdTransformCbCr<-2>;
m_fwdICT[ 3] = fwdTransformCbCr< 3>;
m_fwdICT[-3] = fwdTransformCbCr<-3>;
}
}
TrQuant::~TrQuant()
{
if( m_quant )
{
delete m_quant;
m_quant = nullptr;
}
}
#if ENABLE_SPLIT_PARALLELISM
void TrQuant::copyState( const TrQuant& other )
{
m_quant->copyState( *other.m_quant );
}
#endif
void TrQuant::xDeQuant(const TransformUnit &tu,
CoeffBuf &dstCoeff,
const ComponentID &compID,
const QpParam &cQP)
{
m_quant->dequant( tu, dstCoeff, compID, cQP );
}
void TrQuant::init( const Quant* otherQuant,
const uint32_t uiMaxTrSize,
const bool bUseRDOQ,
const bool bUseRDOQTS,
#if T0196_SELECTIVE_RDOQ
const bool useSelectiveRDOQ,
#endif
const bool bEnc
)
{
delete m_quant;
m_quant = nullptr;
{
m_quant = new DepQuant( otherQuant, bEnc );
}
if( m_quant )
{
m_quant->init( uiMaxTrSize, bUseRDOQ, bUseRDOQTS, useSelectiveRDOQ );
}
}
#if JVET_R0351_HIGH_BIT_DEPTH_SUPPORT
void TrQuant::fwdLfnstNxN( TCoeff* src, TCoeff* dst, const uint32_t mode, const uint32_t index, const uint32_t size, int zeroOutSize )
#else
void TrQuant::fwdLfnstNxN( int* src, int* dst, const uint32_t mode, const uint32_t index, const uint32_t size, int zeroOutSize )
#endif
{
const int8_t* trMat = ( size > 4 ) ? g_lfnst8x8[ mode ][ index ][ 0 ] : g_lfnst4x4[ mode ][ index ][ 0 ];
const int trSize = ( size > 4 ) ? 48 : 16;
#if JVET_R0351_HIGH_BIT_DEPTH_SUPPORT
TCoeff coef;
TCoeff* out = dst;
#else
int coef;
int* out = dst;
#endif
assert( index < 3 );
for( int j = 0; j < zeroOutSize; j++ )
{
#if JVET_R0351_HIGH_BIT_DEPTH_SUPPORT
TCoeff* srcPtr = src;
#else
int* srcPtr = src;
#endif
const int8_t* trMatTmp = trMat;
coef = 0;
for( int i = 0; i < trSize; i++ )
{
coef += *srcPtr++ * *trMatTmp++;
}
*out++ = ( coef + 64 ) >> 7;
trMat += trSize;
}
::memset( out, 0, ( trSize - zeroOutSize ) * sizeof( int ) );
}
#if JVET_R0351_HIGH_BIT_DEPTH_SUPPORT
void TrQuant::invLfnstNxN( TCoeff* src, TCoeff* dst, const uint32_t mode, const uint32_t index, const uint32_t size, int zeroOutSize, const int maxLog2TrDynamicRange )
{
#else
void TrQuant::invLfnstNxN( int* src, int* dst, const uint32_t mode, const uint32_t index, const uint32_t size, int zeroOutSize )
{
int maxLog2TrDynamicRange = 15;
#endif
const TCoeff outputMinimum = -( 1 << maxLog2TrDynamicRange );
const TCoeff outputMaximum = ( 1 << maxLog2TrDynamicRange ) - 1;
const int8_t* trMat = ( size > 4 ) ? g_lfnst8x8[ mode ][ index ][ 0 ] : g_lfnst4x4[ mode ][ index ][ 0 ];
const int trSize = ( size > 4 ) ? 48 : 16;
#if JVET_R0351_HIGH_BIT_DEPTH_SUPPORT
TCoeff resi;
TCoeff* out = dst;
#else
int resi;
int* out = dst;
#endif
assert( index < 3 );
for( int j = 0; j < trSize; j++ )
{
resi = 0;
const int8_t* trMatTmp = trMat;
#if JVET_R0351_HIGH_BIT_DEPTH_SUPPORT
TCoeff* srcPtr = src;
#else
int* srcPtr = src;
#endif
for( int i = 0; i < zeroOutSize; i++ )
{
resi += *srcPtr++ * *trMatTmp;
trMatTmp += trSize;
}
#if JVET_R0351_HIGH_BIT_DEPTH_SUPPORT
*out++ = Clip3<TCoeff>( outputMinimum, outputMaximum, ( resi + 64 ) >> 7 );
#else
*out++ = Clip3( outputMinimum, outputMaximum, ( int ) ( resi + 64 ) >> 7 );
#endif
trMat++;
}
}
uint32_t TrQuant::getLFNSTIntraMode( int wideAngPredMode )
{
uint32_t intraMode;
if( wideAngPredMode < 0 )
{
intraMode = ( uint32_t ) ( wideAngPredMode + ( NUM_EXT_LUMA_MODE >> 1 ) + NUM_LUMA_MODE );
}
else if( wideAngPredMode >= NUM_LUMA_MODE )
{
intraMode = ( uint32_t ) ( wideAngPredMode + ( NUM_EXT_LUMA_MODE >> 1 ) );
}
else
{
intraMode = ( uint32_t ) wideAngPredMode;
}
return intraMode;
}
bool TrQuant::getTransposeFlag( uint32_t intraMode )
{
return ( ( intraMode >= NUM_LUMA_MODE ) && ( intraMode >= ( NUM_LUMA_MODE + ( NUM_EXT_LUMA_MODE >> 1 ) ) ) ) ||
( ( intraMode < NUM_LUMA_MODE ) && ( intraMode > DIA_IDX ) );
}
void TrQuant::xInvLfnst( const TransformUnit &tu, const ComponentID compID )
{
#if JVET_R0351_HIGH_BIT_DEPTH_SUPPORT
const int maxLog2TrDynamicRange = tu.cs->sps->getMaxLog2TrDynamicRange(toChannelType(compID));
#endif
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;
if( lfnstIdx && tu.mtsIdx[compID] != MTS_SKIP && (tu.cu->isSepTree() ? true : isLuma(compID)) )
{
const bool whge3 = width >= 8 && height >= 8;
const ScanElement * scan = whge3 ? g_coefTopLeftDiagScan8x8[ gp_sizeIdxInfo->idxFrom( width ) ] : g_scanOrder[ SCAN_GROUPED_4x4 ][ SCAN_DIAG ][ gp_sizeIdxInfo->idxFrom( width ) ][ gp_sizeIdxInfo->idxFrom( height ) ];
uint32_t intraMode = PU::getFinalIntraMode( *tu.cs->getPU( area.pos(), toChannelType( compID ) ), toChannelType( compID ) );
if( PU::isLMCMode( tu.cs->getPU( area.pos(), toChannelType( compID ) )->intraDir[ toChannelType( compID ) ] ) )
{
intraMode = PU::getCoLocatedIntraLumaMode( *tu.cs->getPU( area.pos(), toChannelType( compID ) ) );
}
if (PU::isMIP(*tu.cs->getPU(area.pos(), toChannelType(compID)), toChannelType(compID)))
{
intraMode = PLANAR_IDX;
}
CHECK( intraMode >= NUM_INTRA_MODE - 1, "Invalid intra mode" );
if( lfnstIdx < 3 )
{
intraMode = getLFNSTIntraMode( PU::getWideAngle( tu, intraMode, compID ) );
#if RExt__DECODER_DEBUG_TOOL_STATISTICS
CodingStatistics::IncrementStatisticTool( CodingStatisticsClassType { STATS__TOOL_LFNST, width, height, compID } );
#endif
bool transposeFlag = getTransposeFlag( intraMode );
const int sbSize = whge3 ? 8 : 4;
bool tu4x4Flag = ( width == 4 && height == 4 );
bool tu8x8Flag = ( width == 8 && height == 8 );
TCoeff* lfnstTemp;
TCoeff* coeffTemp;
int y;
lfnstTemp = m_tempInMatrix; // inverse spectral rearrangement
coeffTemp = m_tempCoeff;
TCoeff * dst = lfnstTemp;
const ScanElement * scanPtr = scan;
for( y = 0; y < 16; y++ )
{
*dst++ = coeffTemp[ scanPtr->idx ];
scanPtr++;
}
#if JVET_R0351_HIGH_BIT_DEPTH_SUPPORT
invLfnstNxN( m_tempInMatrix, m_tempOutMatrix, g_lfnstLut[ intraMode ], lfnstIdx - 1, sbSize, ( tu4x4Flag || tu8x8Flag ) ? 8 : 16, maxLog2TrDynamicRange );
#else
invLfnstNxN( m_tempInMatrix, m_tempOutMatrix, g_lfnstLut[ intraMode ], lfnstIdx - 1, sbSize, ( tu4x4Flag || tu8x8Flag ) ? 8 : 16 );
#endif
lfnstTemp = m_tempOutMatrix; // inverse spectral rearrangement
if( transposeFlag )
{
if( sbSize == 4 )
{
for( y = 0; y < 4; y++ )
{
coeffTemp[ 0 ] = lfnstTemp[ 0 ]; coeffTemp[ 1 ] = lfnstTemp[ 4 ];
coeffTemp[ 2 ] = lfnstTemp[ 8 ]; coeffTemp[ 3 ] = lfnstTemp[ 12 ];
lfnstTemp++;
coeffTemp += width;
}
}
else // ( sbSize == 8 )
{
for( y = 0; y < 8; y++ )
{
coeffTemp[ 0 ] = lfnstTemp[ 0 ]; coeffTemp[ 1 ] = lfnstTemp[ 8 ];
coeffTemp[ 2 ] = lfnstTemp[ 16 ]; coeffTemp[ 3 ] = lfnstTemp[ 24 ];
if( y < 4 )
{
coeffTemp[ 4 ] = lfnstTemp[ 32 ]; coeffTemp[ 5 ] = lfnstTemp[ 36 ];
coeffTemp[ 6 ] = lfnstTemp[ 40 ]; coeffTemp[ 7 ] = lfnstTemp[ 44 ];
}
lfnstTemp++;
coeffTemp += width;
}
}
}
else
{
for( y = 0; y < sbSize; y++ )
{
uint32_t uiStride = ( y < 4 ) ? sbSize : 4;
::memcpy( coeffTemp, lfnstTemp, uiStride * sizeof( TCoeff ) );
lfnstTemp += uiStride;
coeffTemp += width;
}
}
}
}
}
void TrQuant::xFwdLfnst( const TransformUnit &tu, const ComponentID compID, const bool loadTr )
{
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;
if( lfnstIdx && tu.mtsIdx[compID] != MTS_SKIP && (tu.cu->isSepTree() ? true : isLuma(compID)) )
{
const bool whge3 = width >= 8 && height >= 8;
const ScanElement * scan = whge3 ? g_coefTopLeftDiagScan8x8[ gp_sizeIdxInfo->idxFrom( width ) ] : g_scanOrder[ SCAN_GROUPED_4x4 ][ SCAN_DIAG ][ gp_sizeIdxInfo->idxFrom( width ) ][ gp_sizeIdxInfo->idxFrom( height ) ];
uint32_t intraMode = PU::getFinalIntraMode( *tu.cs->getPU( area.pos(), toChannelType( compID ) ), toChannelType( compID ) );
if( PU::isLMCMode( tu.cs->getPU( area.pos(), toChannelType( compID ) )->intraDir[ toChannelType( compID ) ] ) )
{
intraMode = PU::getCoLocatedIntraLumaMode( *tu.cs->getPU( area.pos(), toChannelType( compID ) ) );
}
if (PU::isMIP(*tu.cs->getPU(area.pos(), toChannelType(compID)), toChannelType(compID)))
{
intraMode = PLANAR_IDX;
}
CHECK( intraMode >= NUM_INTRA_MODE - 1, "Invalid intra mode" );
if( lfnstIdx < 3 )
{
intraMode = getLFNSTIntraMode( PU::getWideAngle( tu, intraMode, compID ) );
bool transposeFlag = getTransposeFlag( intraMode );
const int sbSize = whge3 ? 8 : 4;
bool tu4x4Flag = ( width == 4 && height == 4 );
bool tu8x8Flag = ( width == 8 && height == 8 );
TCoeff* lfnstTemp;
TCoeff* coeffTemp;
TCoeff * tempCoeff = loadTr ? m_mtsCoeffs[tu.mtsIdx[compID]] : m_tempCoeff;
int y;
lfnstTemp = m_tempInMatrix; // forward low frequency non-separable transform
coeffTemp = tempCoeff;
if( transposeFlag )
{
if( sbSize == 4 )
{
for( y = 0; y < 4; y++ )
{
lfnstTemp[ 0 ] = coeffTemp[ 0 ]; lfnstTemp[ 4 ] = coeffTemp[ 1 ];
lfnstTemp[ 8 ] = coeffTemp[ 2 ]; lfnstTemp[ 12 ] = coeffTemp[ 3 ];
lfnstTemp++;
coeffTemp += width;
}
}
else // ( sbSize == 8 )
{
for( y = 0; y < 8; y++ )
{
lfnstTemp[ 0 ] = coeffTemp[ 0 ]; lfnstTemp[ 8 ] = coeffTemp[ 1 ];
lfnstTemp[ 16 ] = coeffTemp[ 2 ]; lfnstTemp[ 24 ] = coeffTemp[ 3 ];
if( y < 4 )
{
lfnstTemp[ 32 ] = coeffTemp[ 4 ]; lfnstTemp[ 36 ] = coeffTemp[ 5 ];
lfnstTemp[ 40 ] = coeffTemp[ 6 ]; lfnstTemp[ 44 ] = coeffTemp[ 7 ];
}
lfnstTemp++;
coeffTemp += width;
}
}
}
else
{
for( y = 0; y < sbSize; y++ )
{
uint32_t uiStride = ( y < 4 ) ? sbSize : 4;
::memcpy( lfnstTemp, coeffTemp, uiStride * sizeof( TCoeff ) );
lfnstTemp += uiStride;
coeffTemp += width;
}
}
fwdLfnstNxN( m_tempInMatrix, m_tempOutMatrix, g_lfnstLut[ intraMode ], lfnstIdx - 1, sbSize, ( tu4x4Flag || tu8x8Flag ) ? 8 : 16 );
lfnstTemp = m_tempOutMatrix; // forward spectral rearrangement
coeffTemp = tempCoeff;
const ScanElement * scanPtr = scan;
int lfnstCoeffNum = ( sbSize == 4 ) ? sbSize * sbSize : 48;
for( y = 0; y < lfnstCoeffNum; y++ )
{
coeffTemp[ scanPtr->idx ] = *lfnstTemp++;
scanPtr++;
}
}
}
}
void TrQuant::invTransformNxN( TransformUnit &tu, const ComponentID &compID, PelBuf &pResi, const QpParam &cQP )
{
const CompArea &area = tu.blocks[compID];
const uint32_t uiWidth = area.width;
const uint32_t uiHeight = area.height;
CHECK( uiWidth > tu.cs->sps->getMaxTbSize() || uiHeight > tu.cs->sps->getMaxTbSize(), "Maximal allowed transformation size exceeded!" );
CoeffBuf tempCoeff = CoeffBuf(m_tempCoeff, area);
xDeQuant( tu, tempCoeff, compID, cQP );
DTRACE_COEFF_BUF( D_TCOEFF, tempCoeff, tu, tu.cu->predMode, compID );
if( tu.cs->sps->getUseLFNST() )
{
xInvLfnst( tu, compID );
}
if( tu.mtsIdx[compID] == MTS_SKIP )
{
xITransformSkip( tempCoeff, pResi, tu, compID );
}
else
{
xIT( tu, compID, tempCoeff, pResi );
}
//DTRACE_BLOCK_COEFF(tu.getCoeffs(compID), tu, tu.cu->predMode, compID);
DTRACE_PEL_BUF( D_RESIDUALS, pResi, tu, tu.cu->predMode, compID);
invRdpcmNxN(tu, compID, pResi);
}
void TrQuant::invRdpcmNxN(TransformUnit& tu, const ComponentID &compID, PelBuf &pcResidual)
{
const CompArea &area = tu.blocks[compID];
if (CU::isRDPCMEnabled(*tu.cu) && (tu.mtsIdx[compID] == MTS_SKIP))
{
const uint32_t uiWidth = area.width;
const uint32_t uiHeight = area.height;
RDPCMMode rdpcmMode = RDPCM_OFF;
if (tu.cu->predMode == MODE_INTRA)
{
const ChannelType chType = toChannelType(compID);
const uint32_t uiChFinalMode = PU::getFinalIntraMode(*tu.cs->getPU(area.pos(), chType), chType);
if (uiChFinalMode == VER_IDX || uiChFinalMode == HOR_IDX)
{
rdpcmMode = (uiChFinalMode == VER_IDX) ? RDPCM_VER : RDPCM_HOR;
}
}
else // not intra case
{
rdpcmMode = RDPCMMode(tu.rdpcm[compID]);
}
const TCoeff pelMin = (TCoeff) std::numeric_limits<Pel>::min();
const TCoeff pelMax = (TCoeff) std::numeric_limits<Pel>::max();
if (rdpcmMode == RDPCM_VER)
{
for (uint32_t uiX = 0; uiX < uiWidth; uiX++)
{
TCoeff accumulator = pcResidual.at(uiX, 0); // 32-bit accumulator
for (uint32_t uiY = 1; uiY < uiHeight; uiY++)
{
accumulator += pcResidual.at(uiX, uiY);
pcResidual.at(uiX, uiY) = (Pel) Clip3<TCoeff>(pelMin, pelMax, accumulator);
}
}
}
else if (rdpcmMode == RDPCM_HOR)
{
for (uint32_t uiY = 0; uiY < uiHeight; uiY++)
{
TCoeff accumulator = pcResidual.at(0, uiY);
for (uint32_t uiX = 1; uiX < uiWidth; uiX++)
{
accumulator += pcResidual.at(uiX, uiY);
pcResidual.at(uiX, uiY) = (Pel) Clip3<TCoeff>(pelMin, pelMax, accumulator);
}
}
}
}
}
std::pair<int64_t,int64_t> TrQuant::fwdTransformICT( const TransformUnit &tu, const PelBuf &resCb, const PelBuf &resCr, PelBuf &resC1, PelBuf &resC2, int jointCbCr )
{
CHECK( Size(resCb) != Size(resCr), "resCb and resCr have different sizes" );
CHECK( Size(resCb) != Size(resC1), "resCb and resC1 have different sizes" );
CHECK( Size(resCb) != Size(resC2), "resCb and resC2 have different sizes" );
return (*m_fwdICT[ TU::getICTMode(tu, jointCbCr) ])( resCb, resCr, resC1, resC2 );
}
void TrQuant::invTransformICT( const TransformUnit &tu, PelBuf &resCb, PelBuf &resCr )
{
CHECK( Size(resCb) != Size(resCr), "resCb and resCr have different sizes" );
(*m_invICT[ TU::getICTMode(tu) ])( resCb, resCr );
}
std::vector<int> TrQuant::selectICTCandidates( const TransformUnit &tu, CompStorage* resCb, CompStorage* resCr )
{
CHECK( !resCb[0].valid() || !resCr[0].valid(), "standard components are not valid" );
if( !CU::isIntra( *tu.cu ) )
{
int cbfMask = 3;
resCb[cbfMask].create( tu.blocks[COMPONENT_Cb] );
resCr[cbfMask].create( tu.blocks[COMPONENT_Cr] );
fwdTransformICT( tu, resCb[0], resCr[0], resCb[cbfMask], resCr[cbfMask], cbfMask );
std::vector<int> cbfMasksToTest;
cbfMasksToTest.push_back( cbfMask );
return cbfMasksToTest;
}
std::pair<int64_t,int64_t> pairDist[4];
for( int cbfMask = 0; cbfMask < 4; cbfMask++ )
{
if( cbfMask )
{
CHECK( resCb[cbfMask].valid() || resCr[cbfMask].valid(), "target components for cbfMask=" << cbfMask << " are already present" );
resCb[cbfMask].create( tu.blocks[COMPONENT_Cb] );
resCr[cbfMask].create( tu.blocks[COMPONENT_Cr] );
}
pairDist[cbfMask] = fwdTransformICT( tu, resCb[0], resCr[0], resCb[cbfMask], resCr[cbfMask], cbfMask );
}
std::vector<int> cbfMasksToTest;
int64_t minDist1 = std::min<int64_t>( pairDist[0].first, pairDist[0].second );
int64_t minDist2 = std::numeric_limits<int64_t>::max();
int cbfMask1 = 0;
int cbfMask2 = 0;
for( int cbfMask : { 1, 2, 3 } )
{
if( pairDist[cbfMask].first < minDist1 )
{
cbfMask2 = cbfMask1; minDist2 = minDist1;
cbfMask1 = cbfMask; minDist1 = pairDist[cbfMask1].first;
}
else if( pairDist[cbfMask].first < minDist2 )
{
cbfMask2 = cbfMask; minDist2 = pairDist[cbfMask2].first;
}
}
if( cbfMask1 )
{
cbfMasksToTest.push_back( cbfMask1 );
}
if( cbfMask2 && ( ( minDist2 < (9*minDist1)/8 ) || ( !cbfMask1 && minDist2 < (3*minDist1)/2 ) ) )
{
cbfMasksToTest.push_back( cbfMask2 );
}
return cbfMasksToTest;
}
// ------------------------------------------------------------------------------------------------
// Logical transform
// ------------------------------------------------------------------------------------------------
void TrQuant::getTrTypes(const TransformUnit tu, const ComponentID compID, int &trTypeHor, int &trTypeVer)
{
const bool isExplicitMTS = (CU::isIntra(*tu.cu) ? tu.cs->sps->getUseIntraMTS() : tu.cs->sps->getUseInterMTS() && CU::isInter(*tu.cu)) && isLuma(compID);
const bool isImplicitMTS = CU::isIntra(*tu.cu) && tu.cs->sps->getUseImplicitMTS() && isLuma(compID) && tu.cu->lfnstIdx == 0 && tu.cu->mipFlag == 0;
const bool isISP = CU::isIntra(*tu.cu) && tu.cu->ispMode && isLuma(compID);
const bool isSBT = CU::isInter(*tu.cu) && tu.cu->sbtInfo && isLuma(compID);
trTypeHor = DCT2;
trTypeVer = DCT2;
if (isISP && tu.cu->lfnstIdx)
{
return;
}
if (!tu.cs->sps->getUseMTS())
return;
if (isImplicitMTS || isISP)
{
int width = tu.blocks[compID].width;
int height = tu.blocks[compID].height;
bool widthDstOk = width >= 4 && width <= 16;
bool heightDstOk = height >= 4 && height <= 16;
if (widthDstOk)
trTypeHor = DST7;
if (heightDstOk)
trTypeVer = DST7;
return;
}
if (isSBT)
{
uint8_t sbtIdx = tu.cu->getSbtIdx();
uint8_t sbtPos = tu.cu->getSbtPos();
if( sbtIdx == SBT_VER_HALF || sbtIdx == SBT_VER_QUAD )
{
assert( tu.lwidth() <= MTS_INTER_MAX_CU_SIZE );
if( tu.lheight() > MTS_INTER_MAX_CU_SIZE )
{
trTypeHor = trTypeVer = DCT2;
}
else
{
if( sbtPos == SBT_POS0 ) { trTypeHor = DCT8; trTypeVer = DST7; }
else { trTypeHor = DST7; trTypeVer = DST7; }
}
}
else
{
assert( tu.lheight() <= MTS_INTER_MAX_CU_SIZE );
if( tu.lwidth() > MTS_INTER_MAX_CU_SIZE )
{
trTypeHor = trTypeVer = DCT2;
}
else
{
if( sbtPos == SBT_POS0 ) { trTypeHor = DST7; trTypeVer = DCT8; }
else { trTypeHor = DST7; trTypeVer = DST7; }
}
}
return;
}
if (isExplicitMTS)
{
if (tu.mtsIdx[compID] > MTS_SKIP)
{
int indHor = (tu.mtsIdx[compID] - MTS_DST7_DST7) & 1;
int indVer = (tu.mtsIdx[compID] - MTS_DST7_DST7) >> 1;
trTypeHor = indHor ? DCT8 : DST7;
trTypeVer = indVer ? DCT8 : DST7;
}
}
}
void TrQuant::xT( const TransformUnit &tu, const ComponentID &compID, const CPelBuf &resi, CoeffBuf &dstCoeff, const int width, const int height )
{
const unsigned maxLog2TrDynamicRange = tu.cs->sps->getMaxLog2TrDynamicRange( toChannelType( compID ) );
const unsigned bitDepth = tu.cs->sps->getBitDepth( toChannelType( compID ) );
const int TRANSFORM_MATRIX_SHIFT = g_transformMatrixShift[TRANSFORM_FORWARD];
const uint32_t transformWidthIndex = floorLog2(width ) - 1; // nLog2WidthMinus1, since transform start from 2-point
const uint32_t transformHeightIndex = floorLog2(height) - 1; // nLog2HeightMinus1, since transform start from 2-point
int trTypeHor = DCT2;
int trTypeVer = DCT2;
getTrTypes ( tu, compID, trTypeHor, trTypeVer );
int skipWidth = ( trTypeHor != DCT2 && width == 32 ) ? 16 : width > JVET_C0024_ZERO_OUT_TH ? width - JVET_C0024_ZERO_OUT_TH : 0;
int skipHeight = ( trTypeVer != DCT2 && height == 32 ) ? 16 : height > JVET_C0024_ZERO_OUT_TH ? height - JVET_C0024_ZERO_OUT_TH : 0;
if( tu.cs->sps->getUseLFNST() && tu.cu->lfnstIdx )
{
if( (width == 4 && height > 4) || (width > 4 && height == 4) )
{
skipWidth = width - 4;
skipHeight = height - 4;
}
else if( (width >= 8 && height >= 8) )
{
skipWidth = width - 8;
skipHeight = height - 8;
}
}
#if RExt__DECODER_DEBUG_TOOL_STATISTICS
if ( trTypeHor != DCT2 )
{
CodingStatistics::IncrementStatisticTool( CodingStatisticsClassType{ STATS__TOOL_EMT, uint32_t( width ), uint32_t( height ), compID } );
}
#endif
ALIGN_DATA( MEMORY_ALIGN_DEF_SIZE, TCoeff block[MAX_TB_SIZEY * MAX_TB_SIZEY] );
const Pel *resiBuf = resi.buf;
const int resiStride = resi.stride;
for( int y = 0; y < height; y++ )
{
for( int x = 0; x < width; x++ )
{
block[( y * width ) + x] = resiBuf[( y * resiStride ) + x];
}
}
if( width > 1 && height > 1 ) // 2-D transform
{
const int shift_1st = ((floorLog2(width )) + bitDepth + TRANSFORM_MATRIX_SHIFT) - maxLog2TrDynamicRange + COM16_C806_TRANS_PREC;
const int shift_2nd = (floorLog2(height)) + TRANSFORM_MATRIX_SHIFT + COM16_C806_TRANS_PREC;
CHECK( shift_1st < 0, "Negative shift" );
CHECK( shift_2nd < 0, "Negative shift" );
TCoeff *tmp = ( TCoeff * ) alloca( width * height * sizeof( TCoeff ) );
fastFwdTrans[trTypeHor][transformWidthIndex ](block, tmp, shift_1st, height, 0, skipWidth);
fastFwdTrans[trTypeVer][transformHeightIndex](tmp, dstCoeff.buf, shift_2nd, width, skipWidth, skipHeight);
}
else if( height == 1 ) //1-D horizontal transform
{
const int shift = ((floorLog2(width )) + bitDepth + TRANSFORM_MATRIX_SHIFT) - maxLog2TrDynamicRange + COM16_C806_TRANS_PREC;
CHECK( shift < 0, "Negative shift" );
CHECKD( ( transformWidthIndex < 0 ), "There is a problem with the width." );
fastFwdTrans[trTypeHor][transformWidthIndex]( block, dstCoeff.buf, shift, 1, 0, skipWidth );
}
else //if (iWidth == 1) //1-D vertical transform
{
int shift = ( ( floorLog2(height) ) + bitDepth + TRANSFORM_MATRIX_SHIFT ) - maxLog2TrDynamicRange + COM16_C806_TRANS_PREC;
CHECK( shift < 0, "Negative shift" );
CHECKD( ( transformHeightIndex < 0 ), "There is a problem with the height." );
fastFwdTrans[trTypeVer][transformHeightIndex]( block, dstCoeff.buf, shift, 1, 0, skipHeight );
}
}
void TrQuant::xIT( const TransformUnit &tu, const ComponentID &compID, const CCoeffBuf &pCoeff, PelBuf &pResidual )
{
const int width = pCoeff.width;
const int height = pCoeff.height;
const unsigned maxLog2TrDynamicRange = tu.cs->sps->getMaxLog2TrDynamicRange( toChannelType( compID ) );
const unsigned bitDepth = tu.cs->sps->getBitDepth( toChannelType( compID ) );
const int TRANSFORM_MATRIX_SHIFT = g_transformMatrixShift[TRANSFORM_INVERSE];
const TCoeff clipMinimum = -( 1 << maxLog2TrDynamicRange );
const TCoeff clipMaximum = ( 1 << maxLog2TrDynamicRange ) - 1;
const uint32_t transformWidthIndex = floorLog2(width ) - 1; // nLog2WidthMinus1, since transform start from 2-point
const uint32_t transformHeightIndex = floorLog2(height) - 1; // nLog2HeightMinus1, since transform start from 2-point
int trTypeHor = DCT2;
int trTypeVer = DCT2;
getTrTypes ( tu, compID, trTypeHor, trTypeVer );
int skipWidth = ( trTypeHor != DCT2 && width == 32 ) ? 16 : width > JVET_C0024_ZERO_OUT_TH ? width - JVET_C0024_ZERO_OUT_TH : 0;
int skipHeight = ( trTypeVer != DCT2 && height == 32 ) ? 16 : height > JVET_C0024_ZERO_OUT_TH ? height - JVET_C0024_ZERO_OUT_TH : 0;
if( tu.cs->sps->getUseLFNST() && tu.cu->lfnstIdx )
{
if( (width == 4 && height > 4) || (width > 4 && height == 4) )
{
skipWidth = width - 4;
skipHeight = height - 4;
}
else if( (width >= 8 && height >= 8) )
{
skipWidth = width - 8;
skipHeight = height - 8;
}
}
TCoeff *block = ( TCoeff * ) alloca( width * height * sizeof( TCoeff ) );
if( width > 1 && height > 1 ) //2-D transform
{
const int shift_1st = TRANSFORM_MATRIX_SHIFT + 1 + COM16_C806_TRANS_PREC; // 1 has been added to shift_1st at the expense of shift_2nd
const int shift_2nd = ( TRANSFORM_MATRIX_SHIFT + maxLog2TrDynamicRange - 1 ) - bitDepth + COM16_C806_TRANS_PREC;
CHECK( shift_1st < 0, "Negative shift" );
CHECK( shift_2nd < 0, "Negative shift" );
TCoeff *tmp = ( TCoeff * ) alloca( width * height * sizeof( TCoeff ) );
fastInvTrans[trTypeVer][transformHeightIndex](pCoeff.buf, tmp, shift_1st, width, skipWidth, skipHeight, clipMinimum, clipMaximum);
fastInvTrans[trTypeHor][transformWidthIndex] (tmp, block, shift_2nd, height, 0, skipWidth, clipMinimum, clipMaximum);
}
else if( width == 1 ) //1-D vertical transform
{
int shift = ( TRANSFORM_MATRIX_SHIFT + maxLog2TrDynamicRange - 1 ) - bitDepth + COM16_C806_TRANS_PREC;
CHECK( shift < 0, "Negative shift" );
CHECK( ( transformHeightIndex < 0 ), "There is a problem with the height." );
fastInvTrans[trTypeVer][transformHeightIndex]( pCoeff.buf, block, shift + 1, 1, 0, skipHeight, clipMinimum, clipMaximum );
}
else //if(iHeight == 1) //1-D horizontal transform
{
const int shift = ( TRANSFORM_MATRIX_SHIFT + maxLog2TrDynamicRange - 1 ) - bitDepth + COM16_C806_TRANS_PREC;
CHECK( shift < 0, "Negative shift" );
CHECK( ( transformWidthIndex < 0 ), "There is a problem with the width." );
fastInvTrans[trTypeHor][transformWidthIndex]( pCoeff.buf, block, shift + 1, 1, 0, skipWidth, clipMinimum, clipMaximum );
}
Pel *resiBuf = pResidual.buf;
int resiStride = pResidual.stride;
for( int y = 0; y < height; y++ )
{
for( int x = 0; x < width; x++ )
{
resiBuf[( y * resiStride ) + x] = Pel( block[( y * width ) + x] );
}
}
}
/** Wrapper function between HM interface and core NxN transform skipping
*/
void TrQuant::xITransformSkip(const CCoeffBuf &pCoeff,
PelBuf &pResidual,
const TransformUnit &tu,
const ComponentID &compID)
{
const CompArea &area = tu.blocks[compID];
const int width = area.width;
const int height = area.height;
for (uint32_t y = 0; y < height; y++)
{
for (uint32_t x = 0; x < width; x++)
{
pResidual.at(x, y) = Pel(pCoeff.at(x, y));
}
}
}
void TrQuant::xQuant(TransformUnit &tu, const ComponentID &compID, const CCoeffBuf &pSrc, TCoeff &uiAbsSum, const QpParam &cQP, const Ctx& ctx)
{
m_quant->quant( tu, compID, pSrc, uiAbsSum, cQP, ctx );
}
void TrQuant::transformNxN( TransformUnit& tu, const ComponentID& compID, const QpParam& cQP, std::vector<TrMode>* trModes, const int maxCand )
{
CodingStructure &cs = *tu.cs;
const CompArea &rect = tu.blocks[compID];
const uint32_t width = rect.width;
const uint32_t height = rect.height;
const CPelBuf resiBuf = cs.getResiBuf(rect);
CHECK( cs.sps->getMaxTbSize() < width, "Unsupported transformation size" );
int pos = 0;
std::vector<TrCost> trCosts;
std::vector<TrMode>::iterator it = trModes->begin();
const double facBB[] = { 1.2, 1.3, 1.3, 1.4, 1.5 };
while( it != trModes->end() )
{
tu.mtsIdx[compID] = it->first;
CoeffBuf tempCoeff( m_mtsCoeffs[tu.mtsIdx[compID]], rect);
if( tu.noResidual )
{
int sumAbs = 0;
trCosts.push_back( TrCost( sumAbs, pos++ ) );
it++;
continue;
}
if ( tu.mtsIdx[compID] == MTS_SKIP )
{
xTransformSkip( tu, compID, resiBuf, tempCoeff.buf );
}
else
{
xT( tu, compID, resiBuf, tempCoeff, width, height );
}
int sumAbs = 0;
for( int pos = 0; pos < width*height; pos++ )
{
sumAbs += abs( tempCoeff.buf[pos] );
}
double scaleSAD=1.0;
if ( tu.mtsIdx[compID] == MTS_SKIP && ((floorLog2(width) + floorLog2(height)) & 1) == 1)
{
scaleSAD=1.0/1.414213562; // compensate for not scaling transform skip coefficients by 1/sqrt(2)
}
if (tu.mtsIdx[compID] == MTS_SKIP)
{
int trShift = getTransformShift(tu.cu->slice->getSPS()->getBitDepth(toChannelType(compID)), rect.size(), tu.cu->slice->getSPS()->getMaxLog2TrDynamicRange(toChannelType(compID)));
scaleSAD *= pow(2, trShift);
}
trCosts.push_back( TrCost( int(sumAbs*scaleSAD), pos++ ) );
it++;
}
int numTests = 0;
std::vector<TrCost>::iterator itC = trCosts.begin();
const double fac = facBB[std::max(0, floorLog2(std::max(width, height)) - 2)];
const double thr = fac * trCosts.begin()->first;
const double thrTS = trCosts.begin()->first;
while( itC != trCosts.end() )
{
const bool testTr = itC->first <= ( itC->second == 1 ? thrTS : thr ) && numTests <= maxCand;
trModes->at( itC->second ).second = testTr;
numTests += testTr;
itC++;
}
}
void TrQuant::transformNxN( TransformUnit& tu, const ComponentID& compID, const QpParam& cQP, TCoeff& uiAbsSum, const Ctx& ctx, const bool loadTr )
{
CodingStructure &cs = *tu.cs;
const SPS &sps = *cs.sps;
const CompArea &rect = tu.blocks[compID];
const uint32_t uiWidth = rect.width;
const uint32_t uiHeight = rect.height;
const CPelBuf resiBuf = cs.getResiBuf(rect);
if( tu.noResidual )
{
uiAbsSum = 0;
TU::setCbfAtDepth( tu, compID, tu.depth, uiAbsSum > 0 );
return;
}
RDPCMMode rdpcmMode = RDPCM_OFF;
rdpcmNxN(tu, compID, cQP, uiAbsSum, rdpcmMode);
if ((tu.cu->bdpcmMode && isLuma(compID)) || (!isLuma(compID) && tu.cu->bdpcmModeChroma))
{
tu.mtsIdx[compID] = MTS_SKIP;
}
if (rdpcmMode == RDPCM_OFF)
{
uiAbsSum = 0;
// transform and quantize
CHECK( cs.sps->getMaxTbSize() < uiWidth, "Unsupported transformation size" );
CoeffBuf tempCoeff(loadTr ? m_mtsCoeffs[tu.mtsIdx[compID]] : m_tempCoeff, rect);
DTRACE_PEL_BUF( D_RESIDUALS, resiBuf, tu, tu.cu->predMode, compID );
if( !loadTr )
{
if ( tu.mtsIdx[compID] == MTS_SKIP )
{
xTransformSkip( tu, compID, resiBuf, tempCoeff.buf );
}
else
{
xT( tu, compID, resiBuf, tempCoeff, uiWidth, uiHeight );
}
}
if( sps.getUseLFNST() )
{
xFwdLfnst( tu, compID, loadTr );
}
DTRACE_COEFF_BUF( D_TCOEFF, tempCoeff, tu, tu.cu->predMode, compID );
xQuant( tu, compID, tempCoeff, uiAbsSum, cQP, ctx );
DTRACE_COEFF_BUF( D_TCOEFF, tu.getCoeffs( compID ), tu, tu.cu->predMode, compID );
}
// set coded block flag (CBF)
TU::setCbfAtDepth (tu, compID, tu.depth, uiAbsSum > 0);
}
void TrQuant::applyForwardRDPCM(TransformUnit &tu, const ComponentID &compID, const QpParam &cQP, TCoeff &uiAbsSum, const RDPCMMode &mode)
{
const uint32_t uiWidth = tu.blocks[compID].width;
const uint32_t uiHeight = tu.blocks[compID].height;
const bool rotateResidual = TU::isNonTransformedResidualRotated(tu, compID);
const uint32_t uiSizeMinus1 = (uiWidth * uiHeight) - 1;
const CPelBuf pcResidual = tu.cs->getResiBuf(tu.blocks[compID]);
const CoeffBuf pcCoeff = tu.getCoeffs(compID);
uint32_t uiX = 0;
uint32_t uiY = 0;
uint32_t &majorAxis = (mode == RDPCM_VER) ? uiX : uiY;
uint32_t &minorAxis = (mode == RDPCM_VER) ? uiY : uiX;
const uint32_t majorAxisLimit = (mode == RDPCM_VER) ? uiWidth : uiHeight;
const uint32_t minorAxisLimit = (mode == RDPCM_VER) ? uiHeight : uiWidth;
const bool bUseHalfRoundingPoint = (mode != RDPCM_OFF);
uiAbsSum = 0;
for (majorAxis = 0; majorAxis < majorAxisLimit; majorAxis++)
{
TCoeff accumulatorValue = 0; // 32-bit accumulator
for (minorAxis = 0; minorAxis < minorAxisLimit; minorAxis++)
{
const uint32_t sampleIndex = (uiY * uiWidth) + uiX;
const uint32_t coefficientIndex = (rotateResidual ? (uiSizeMinus1-sampleIndex) : sampleIndex);
const Pel currentSample = pcResidual.at(uiX, uiY);
const TCoeff encoderSideDelta = TCoeff(currentSample) - accumulatorValue;
Pel reconstructedDelta;
m_quant->transformSkipQuantOneSample(tu, compID, encoderSideDelta, pcCoeff.buf[coefficientIndex], coefficientIndex, cQP, bUseHalfRoundingPoint);
m_quant->invTrSkipDeQuantOneSample (tu, compID, pcCoeff.buf[coefficientIndex], reconstructedDelta, coefficientIndex, cQP);
uiAbsSum += abs(pcCoeff.buf[coefficientIndex]);
if (mode != RDPCM_OFF)
{
accumulatorValue += reconstructedDelta;
}
}
}
}
void TrQuant::rdpcmNxN(TransformUnit &tu, const ComponentID &compID, const QpParam &cQP, TCoeff &uiAbsSum, RDPCMMode &rdpcmMode)
{
if (!CU::isRDPCMEnabled(*tu.cu) || (tu.mtsIdx[compID] != MTS_SKIP))
{
rdpcmMode = RDPCM_OFF;
}
else if (CU::isIntra(*tu.cu))
{
const ChannelType chType = toChannelType(compID);
const uint32_t uiChFinalMode = PU::getFinalIntraMode(*tu.cs->getPU(tu.blocks[compID].pos(), chType), chType);
if (uiChFinalMode == VER_IDX || uiChFinalMode == HOR_IDX)
{
rdpcmMode = (uiChFinalMode == VER_IDX) ? RDPCM_VER : RDPCM_HOR;
applyForwardRDPCM(tu, compID, cQP, uiAbsSum, rdpcmMode);
}
else
{
rdpcmMode = RDPCM_OFF;
}
}
else // not intra, need to select the best mode
{
const CompArea &area = tu.blocks[compID];
const uint32_t uiWidth = area.width;
const uint32_t uiHeight = area.height;
RDPCMMode bestMode = NUMBER_OF_RDPCM_MODES;
TCoeff bestAbsSum = std::numeric_limits<TCoeff>::max();
TCoeff bestCoefficients[MAX_TB_SIZEY * MAX_TB_SIZEY];
for (uint32_t modeIndex = 0; modeIndex < NUMBER_OF_RDPCM_MODES; modeIndex++)
{
const RDPCMMode mode = RDPCMMode(modeIndex);
TCoeff currAbsSum = 0;
applyForwardRDPCM(tu, compID, cQP, uiAbsSum, rdpcmMode);
if (currAbsSum < bestAbsSum)
{
bestMode = mode;
bestAbsSum = currAbsSum;
if (mode != RDPCM_OFF)
{
CoeffBuf(bestCoefficients, uiWidth, uiHeight).copyFrom(tu.getCoeffs(compID));
}
}
}
rdpcmMode = bestMode;
uiAbsSum = bestAbsSum;
if (rdpcmMode != RDPCM_OFF) //the TU is re-transformed and quantized if DPCM_OFF is returned, so there is no need to preserve it here
{
tu.getCoeffs(compID).copyFrom(CoeffBuf(bestCoefficients, uiWidth, uiHeight));
}
}
tu.rdpcm[compID] = rdpcmMode;
}
void TrQuant::xTransformSkip(const TransformUnit &tu, const ComponentID &compID, const CPelBuf &resi, TCoeff* psCoeff)
{
const CompArea &rect = tu.blocks[compID];
const uint32_t width = rect.width;
const uint32_t height = rect.height;
for (uint32_t y = 0, coefficientIndex = 0; y < height; y++)
{
for (uint32_t x = 0; x < width; x++, coefficientIndex++)
{
psCoeff[ coefficientIndex ] = TCoeff(resi.at(x, y));
}
}
}
//! \}