ErrVal MbDecoder::xDecodeMbIntra16x16( MbDataAccess& rcMbDataAccess,
IntYuvMbBuffer& cYuvMbBuffer,
IntYuvMbBuffer& rcPredBuffer )
{
Int iStride = cYuvMbBuffer.getLStride();
RNOK( m_pcIntraPrediction->predictLumaMb( cYuvMbBuffer.getMbLumAddr(), iStride, rcMbDataAccess.getMbData().intraPredMode() ) );
rcPredBuffer.loadLuma( cYuvMbBuffer );
MbTransformCoeffs& rcCoeffs = m_cTCoeffs;
Quantizer cQuantizer; cQuantizer.setQp ( rcMbDataAccess, false );
const QpParameter rcLQp = cQuantizer.getLumaQp();
Int iScaleY = g_aaiDequantCoef[rcLQp.rem()][0] << rcLQp.per();
const UChar* pucScaleY = rcMbDataAccess.getSH().getScalingMatrix( 0 );
if( pucScaleY )
{
iScaleY *= pucScaleY[0];
iScaleY >>= 4;
}
RNOK( m_pcTransform->invTransformDcCoeff( rcCoeffs.get( B4x4Idx(0) ), iScaleY ) );
for( B4x4Idx cIdx; cIdx.isLegal(); cIdx++ )
{
RNOK( m_pcTransform->invTransform4x4Blk( cYuvMbBuffer.getYBlk( cIdx ), iStride, rcCoeffs.get( cIdx ) ) );
}
UInt uiChromaCbp = rcMbDataAccess.getMbData().getCbpChroma16x16();
RNOK( xDecodeChroma( rcMbDataAccess, cYuvMbBuffer, rcPredBuffer, uiChromaCbp, true ) );
return Err::m_nOK;
}
ErrVal MbDecoder::xDecodeMbIntra4x4( MbDataAccess& rcMbDataAccess,
IntYuvMbBuffer& cYuvMbBuffer,
IntYuvMbBuffer& rcPredBuffer )
{
Int iStride = cYuvMbBuffer.getLStride();
MbTransformCoeffs& rcCoeffs = m_cTCoeffs;
for( B4x4Idx cIdx; cIdx.isLegal(); cIdx++ )
{
rcMbDataAccess.getMbData().intraPredMode( cIdx ) = rcMbDataAccess.decodeIntraPredMode( cIdx );
XPel* puc = cYuvMbBuffer.getYBlk( cIdx );
UInt uiPredMode = rcMbDataAccess.getMbData().intraPredMode( cIdx );
RNOK( m_pcIntraPrediction->predictLumaBlock( puc, iStride, uiPredMode, cIdx ) );
rcPredBuffer.loadLuma( cYuvMbBuffer, cIdx );
if( rcMbDataAccess.getMbData().is4x4BlkCoded( cIdx ) )
{
RNOK( m_pcTransform->invTransform4x4Blk( puc, iStride, rcCoeffs.get( cIdx ) ) );
}
}
UInt uiChromaCbp = rcMbDataAccess.getMbData().getCbpChroma4x4();
RNOK( xDecodeChroma( rcMbDataAccess, cYuvMbBuffer, rcPredBuffer, uiChromaCbp, true ) );
return Err::m_nOK;
}
Void MbTransformCoeffs::add( MbTransformCoeffs* pcCoeffs, Bool bLuma, Bool bChroma )
{
if( bLuma )
{
for( B4x4Idx bIdx; bIdx.isLegal(); bIdx++ )
{
TCoeff* piCoeff = get( bIdx );
TCoeff* piSrcCoeff = pcCoeffs->get( bIdx );
for( UInt ui=0; ui<16; ui++ )
{
piCoeff[ui]+= piSrcCoeff[ui];
}
}
}
if( bChroma )
{
for( CIdx cIdx; cIdx.isLegal(); cIdx++ )
{
TCoeff* piCoeff = get( cIdx );
TCoeff* piSrcCoeff = pcCoeffs->get( cIdx );
for( UInt ui=0; ui<16; ui++ )
{
piCoeff[ui] += piSrcCoeff[ui];
}
}
}
}
Void
MbTransformCoeffs::switchLevelCoeffData()
{
TCoeff sTemp;
for( B4x4Idx bIdx; bIdx.isLegal(); bIdx++ )
{
//TCoeff* piCoeff = m_aaiLevel[bIdx];
TCoeff* piCoeff = get( bIdx );
for( UInt ui=0; ui<16; ui++ )
{
sTemp = piCoeff[ui].getLevel();
piCoeff[ui].setLevel( piCoeff[ui].getCoeff() );
piCoeff[ui].setCoeff( sTemp );
}
}
for( CIdx cIdx; cIdx.isLegal(); cIdx++ )
{
//TCoeff* piCoeff = m_aaiLevel[cIdx];
TCoeff* piCoeff = get( cIdx );
for( UInt ui=0; ui<16; ui++ )
{
sTemp = piCoeff[ui].getLevel();
piCoeff[ui].setLevel( piCoeff[ui].getCoeff() );
piCoeff[ui].setCoeff( sTemp );
}
}
}
ErrVal MbDecoder::xDecodeMbIntraBL( MbDataAccess& rcMbDataAccess,
IntYuvPicBuffer* pcRecYuvBuffer,
IntYuvMbBuffer& rcPredBuffer,
IntYuvPicBuffer* pcBaseYuvBuffer )
{
IntYuvMbBuffer cYuvMbBuffer;
MbTransformCoeffs& rcCoeffs = m_cTCoeffs;
cYuvMbBuffer.loadBuffer ( pcBaseYuvBuffer );
rcPredBuffer.loadLuma ( cYuvMbBuffer );
rcPredBuffer.loadChroma ( cYuvMbBuffer );
if( rcMbDataAccess.getMbData().isTransformSize8x8() )
{
for( B8x8Idx cIdx; cIdx.isLegal(); cIdx++ )
{
if( rcMbDataAccess.getMbData().is4x4BlkCoded( cIdx ) )
{
RNOK( m_pcTransform->invTransform8x8Blk( cYuvMbBuffer.getYBlk( cIdx ),
cYuvMbBuffer.getLStride(),
rcCoeffs.get8x8(cIdx) ) );
}
}
}
else
{
for( B4x4Idx cIdx; cIdx.isLegal(); cIdx++ )
{
if( rcMbDataAccess.getMbData().is4x4BlkCoded( cIdx ) )
{
RNOK( m_pcTransform->invTransform4x4Blk( cYuvMbBuffer.getYBlk( cIdx ),
cYuvMbBuffer.getLStride(),
rcCoeffs.get(cIdx) ) );
}
}
}
UInt uiChromaCbp = rcMbDataAccess.getMbData().getCbpChroma4x4();
RNOK( xDecodeChroma( rcMbDataAccess, cYuvMbBuffer, rcPredBuffer, uiChromaCbp, false ) );
pcRecYuvBuffer->loadBuffer( &cYuvMbBuffer );
return Err::m_nOK;
}
// functions for SVC to AVC rewrite JVT-V035
Void
MbTransformCoeffs::storeLevelData()
{
for( B4x4Idx bIdx; bIdx.isLegal(); bIdx++ )
{
//TCoeff* piCoeff = m_aaiLevel[bIdx];
TCoeff* piCoeff = get( bIdx );
for( UInt ui=0; ui<16; ui++ )
piCoeff[ui].setLevel( piCoeff[ui].getCoeff() );
}
for( CIdx cIdx; cIdx.isLegal(); cIdx++ )
{
//TCoeff* piCoeff = m_aaiLevel[cIdx];
TCoeff* piCoeff = get( cIdx );
for( UInt ui=0; ui<16; ui++ )
piCoeff[ui].setLevel( piCoeff[ui].getCoeff() );
}
}
ErrVal
SliceEncoder::xAddTCoeffs2( MbDataAccess& rcMbDataAccess, MbDataAccess& rcMbDataAccessBase )
{
if( rcMbDataAccess.getMbData().isPCM() )
{
TCoeff* pSrc = rcMbDataAccessBase.getMbTCoeffs().getTCoeffBuffer();
TCoeff* pDes = rcMbDataAccess .getMbTCoeffs().getTCoeffBuffer();
for( UInt ui = 0; ui < 384; ui++, pSrc++, pDes++ )
{
ROT( pDes->getLevel() );
pDes->setLevel( pSrc->getLevel() );
}
ROT( rcMbDataAccess.getMbData().getMbExtCbp() );
return Err::m_nOK;
}
UInt uiBCBP = 0;
UInt uiCoded = 0;
Bool bCoded = false;
Bool bChromaAC = false;
Bool bChromaDC = false;
// Add the luma coefficients and track the new BCBP
if( rcMbDataAccess.getMbData().isTransformSize8x8() )
{
for( B8x8Idx c8x8Idx; c8x8Idx.isLegal(); c8x8Idx++ )
{
bCoded = false;
m_pcTransform->addPrediction8x8Blk( rcMbDataAccess.getMbTCoeffs().get8x8( c8x8Idx ),
rcMbDataAccessBase.getMbTCoeffs().get8x8( c8x8Idx ),
rcMbDataAccess.getMbData().getQp(),
rcMbDataAccessBase.getMbData().getQp(), bCoded );
if( rcMbDataAccess.getMbData().isIntra16x16() )
AOT(1);
if( bCoded )
uiBCBP |= (0x33 << c8x8Idx.b4x4());
}
}
else
{
for( B4x4Idx cIdx; cIdx.isLegal(); cIdx++ )
{
uiCoded = 0;
m_pcTransform->addPrediction4x4Blk( rcMbDataAccess.getMbTCoeffs().get( cIdx ),
rcMbDataAccessBase.getMbTCoeffs().get( cIdx ),
rcMbDataAccess.getMbData().getQp(),
rcMbDataAccessBase.getMbData().getQp(), uiCoded );
if( rcMbDataAccess.getMbData().isIntra16x16() )
{
if( *(rcMbDataAccess.getMbTCoeffs().get( cIdx )) )
uiCoded--;
}
if( uiCoded )
uiBCBP |= 1<<cIdx;
}
if( rcMbDataAccess.getMbData().isIntra16x16() )
{
uiBCBP = uiBCBP?((1<<16)-1):0;
}
}
// Add the chroma coefficients and update the BCBP
m_pcTransform->addPredictionChromaBlocks( rcMbDataAccess.getMbTCoeffs().get( CIdx(0) ),
rcMbDataAccessBase.getMbTCoeffs().get( CIdx(0) ),
rcMbDataAccess.getSH().getCbQp( rcMbDataAccess.getMbData().getQp() ),
rcMbDataAccess.getSH().getBaseSliceHeader()->getCbQp( rcMbDataAccessBase.getMbData().getQp() ),
bChromaDC, bChromaAC );
m_pcTransform->addPredictionChromaBlocks( rcMbDataAccess.getMbTCoeffs().get( CIdx(4) ),
rcMbDataAccessBase.getMbTCoeffs().get( CIdx(4) ),
rcMbDataAccess.getSH().getCrQp( rcMbDataAccess.getMbData().getQp() ),
rcMbDataAccess.getSH().getBaseSliceHeader()->getCrQp( rcMbDataAccessBase.getMbData().getQp() ),
bChromaDC, bChromaAC );
uiBCBP |= (bChromaAC?2:(bChromaDC?1:0))<<16;
// Update the CBP
rcMbDataAccess.getMbData().setAndConvertMbExtCbp( uiBCBP );
// Update the Intra16x16 mode
if( rcMbDataAccess.getMbData().isIntra16x16() )
{
UInt uiMbType = INTRA_4X4 + 1;
UInt uiPredMode = rcMbDataAccess.getMbData().intraPredMode();
UInt uiChromaCbp = uiBCBP>>16;
Bool bACcoded = (uiBCBP && ((1<<16)-1));
uiMbType += uiPredMode;
uiMbType += ( bACcoded ) ? 12 : 0;
uiMbType += uiChromaCbp << 2;
rcMbDataAccess.getMbData().setMbMode( MbMode(uiMbType) );
// Sanity checks
if( rcMbDataAccess.getMbData().intraPredMode() != uiPredMode )
AOT(1);
if( rcMbDataAccess.getMbData().getCbpChroma16x16() != uiChromaCbp )
AOT(1);
if( rcMbDataAccess.getMbData().isAcCoded() != bACcoded )
AOT(1);
}
// JVT-V035
ErrVal
SliceEncoder::updatePictureAVCRewrite( ControlData& rcControlData, UInt uiMbInRow )
{
ROF( m_bInitDone );
SliceHeader& rcSliceHeader = *rcControlData.getSliceHeader();
FMO& rcFMO = *rcSliceHeader.getFMO();
MbDataCtrl* pcMbDataCtrl = rcControlData.getMbDataCtrl();
MbDataCtrl* pcBaseLayerCtrl = rcControlData.getBaseLayerCtrl();
//====== initialization ======
RNOK( pcMbDataCtrl->initSlice( rcSliceHeader, DECODE_PROCESS, false, NULL ) );
if( rcSliceHeader.getTCoeffLevelPredictionFlag() == true )
{
// Update the macroblock state
// Must be done after the bit-stream has been constructed
for( Int iSliceGroupId = rcFMO.getFirstSliceGroupId(); ! rcFMO.SliceGroupCompletelyCoded( iSliceGroupId ); iSliceGroupId = rcFMO.getNextSliceGroupId( iSliceGroupId ) )
{
UInt uiFirstMbInSliceGroup = rcFMO.getFirstMBOfSliceGroup( iSliceGroupId );
UInt uiLastMbInSliceGroup = rcFMO.getLastMBInSliceGroup ( iSliceGroupId );
for( UInt uiMbAddress = uiFirstMbInSliceGroup; uiMbAddress <= uiLastMbInSliceGroup; uiMbAddress = rcFMO.getNextMBNr( uiMbAddress ) )
{
UInt uiMbY = 0;
UInt uiMbX = 0;
MbDataAccess* pcMbDataAccess = 0;
MbDataAccess* pcMbDataAccessBase = 0;
rcSliceHeader.getMbPositionFromAddress( uiMbY, uiMbX, uiMbAddress );
RNOK( pcMbDataCtrl->initMb( pcMbDataAccess, uiMbY, uiMbX ) );
if( pcBaseLayerCtrl )
{
RNOK( pcBaseLayerCtrl ->initMb( pcMbDataAccessBase, uiMbY, uiMbX ) );
pcMbDataAccess->setMbDataAccessBase( pcMbDataAccessBase );
}
// modify QP values (as specified in G.8.1.5.1.2)
if( pcMbDataAccess->getMbData().getMbCbp() == 0 && ( pcMbDataAccess->getMbData().getMbMode() == INTRA_BL || pcMbDataAccess->getMbData().getResidualPredFlag() ) )
{
pcMbDataAccess->getMbData().setQp( pcMbDataAccessBase->getMbData().getQp() );
}
if( pcMbDataAccess->isTCoeffPred() )
{
if( pcMbDataAccess->getMbData().getMbMode() == INTRA_BL )
{
// We're going to use the BL skip flag to correctly decode the intra prediction mode
AOT( pcMbDataAccess->getMbData().getBLSkipFlag() == false );
// Inherit the mode of the base block
pcMbDataAccess->getMbData().setMbMode( pcMbDataAccessBase->getMbData().getMbMode() );
// Inherit intra prediction modes
for( B4x4Idx cIdx; cIdx.isLegal(); cIdx++ )
pcMbDataAccess->getMbData().intraPredMode(cIdx) = pcMbDataAccessBase->getMbData().intraPredMode(cIdx);
pcMbDataAccess->getMbData().setChromaPredMode( pcMbDataAccessBase->getMbData().getChromaPredMode() );
}
// The 8x8 transform flag is present in the bit-stream unless transform coefficients
// are not transmitted at the enhancement layer. In this case, inherit the base layer
// transform type. This makes intra predition work correctly, etc.
if( ( pcMbDataAccess->getMbData().getMbCbp() & 0x0F ) == 0 )
{
pcMbDataAccess->getMbData().setTransformSize8x8( pcMbDataAccessBase->getMbData().isTransformSize8x8() );
}
xAddTCoeffs2( *pcMbDataAccess, *pcMbDataAccessBase );
}
if( pcMbDataAccess->getMbAddress() != uiFirstMbInSliceGroup &&
pcMbDataAccess->getSH().getTCoeffLevelPredictionFlag() &&
!pcMbDataAccess->getSH().getNoInterLayerPredFlag() &&
!pcMbDataAccess->getMbData().isIntra16x16() &&
pcMbDataAccess->getMbData().getMbExtCbp() == 0 )
{
pcMbDataAccess->getMbData().setQp4LF( pcMbDataAccess->getLastQp4LF() );
}
else
{
pcMbDataAccess->getMbData().setQp4LF( pcMbDataAccess->getMbData().getQp() );
}
}
}
}
return Err::m_nOK;
}
ErrVal MbDecoder::xDecodeMbInter( MbDataAccess& rcMbDataAccess,
MbDataAccess* pcMbDataAccessBase,
IntYuvMbBuffer& rcPredBuffer,
IntYuvPicBuffer* pcRecYuvBuffer,
IntFrame* pcResidual,
IntFrame* pcBaseResidual,
RefFrameList& rcRefFrameList0,
RefFrameList& rcRefFrameList1,
Bool bReconstruct )
{
IntYuvMbBuffer cYuvMbBuffer; cYuvMbBuffer .setAllSamplesToZero();
IntYuvMbBuffer cYuvMbBufferResidual; cYuvMbBufferResidual.setAllSamplesToZero();
MbTransformCoeffs& rcCoeffs = m_cTCoeffs;
Bool bCalcMv = false;
Bool bFaultTolerant = true;
//===== derive motion vectors =====
calcMv( rcMbDataAccess, pcMbDataAccessBase );
//===== get prediction signal when full reconstruction is requested =====
if( bReconstruct )
{
if( rcMbDataAccess.getMbData().getMbMode() == MODE_8x8 || rcMbDataAccess.getMbData().getMbMode() == MODE_8x8ref0 )
{
for( B8x8Idx c8x8Idx; c8x8Idx.isLegal(); c8x8Idx++ )
{
//----- motion compensated prediction -----
RNOK( m_pcMotionCompensation->compensateSubMb ( c8x8Idx,
rcMbDataAccess, rcRefFrameList0, rcRefFrameList1,
&cYuvMbBuffer, bCalcMv, bFaultTolerant ) );
}
}
else
{
//----- motion compensated prediction -----
RNOK( m_pcMotionCompensation->compensateMb ( rcMbDataAccess,
rcRefFrameList0,
rcRefFrameList1,
&cYuvMbBuffer,
bCalcMv ) );
}
rcPredBuffer.loadLuma ( cYuvMbBuffer );
rcPredBuffer.loadChroma ( cYuvMbBuffer );
}
//===== reconstruct residual signal by using transform coefficients ======
m_pcTransform->setClipMode( false );
if( rcMbDataAccess.getMbData().isTransformSize8x8() )
{
for( B8x8Idx cIdx; cIdx.isLegal(); cIdx++ )
{
if( rcMbDataAccess.getMbData().is4x4BlkCoded( cIdx ) )
{
RNOK( m_pcTransform->invTransform8x8Blk( cYuvMbBufferResidual.getYBlk( cIdx ),
cYuvMbBufferResidual.getLStride(),
rcCoeffs.get8x8(cIdx) ) );
}
}
}
else
{
for( B4x4Idx cIdx; cIdx.isLegal(); cIdx++ )
{
if( rcMbDataAccess.getMbData().is4x4BlkCoded( cIdx ) )
{
RNOK( m_pcTransform->invTransform4x4Blk( cYuvMbBufferResidual.getYBlk( cIdx ),
cYuvMbBufferResidual.getLStride(),
rcCoeffs.get(cIdx) ) );
}
}
}
UInt uiChromaCbp = rcMbDataAccess.getMbData().getCbpChroma4x4();
RNOK( xDecodeChroma( rcMbDataAccess, cYuvMbBufferResidual, rcPredBuffer, uiChromaCbp, false ) );
m_pcTransform->setClipMode( true );
//===== add base layer residual =====
if( rcMbDataAccess.getMbData().getResidualPredFlag( PART_16x16 ) )
{
IntYuvMbBuffer cBaseLayerBuffer;
cBaseLayerBuffer.loadBuffer( pcBaseResidual->getFullPelYuvBuffer() );
//-- JVT-R091
if ( bReconstruct && rcMbDataAccess.getMbData().getSmoothedRefFlag() )
{
IntYuvMbBuffer cMbBuffer;
// obtain P
cMbBuffer.loadLuma ( cYuvMbBuffer );
cMbBuffer.loadChroma( cYuvMbBuffer );
// P+Rb
cMbBuffer.add( cBaseLayerBuffer );
// S(P+Rb)
pcRecYuvBuffer->loadBuffer( &cMbBuffer );
pcRecYuvBuffer->smoothMbInside();
if ( rcMbDataAccess.isAboveMbExisting() )
{
pcRecYuvBuffer->smoothMbTop();
}
if ( rcMbDataAccess.isLeftMbExisting() )
{
pcRecYuvBuffer->smoothMbLeft();
}
// store new prediction
cYuvMbBuffer.loadBuffer ( pcRecYuvBuffer );
cYuvMbBuffer.subtract ( cBaseLayerBuffer );
// update rcPredBuffer
rcPredBuffer.loadLuma ( cYuvMbBuffer );
rcPredBuffer.loadChroma ( cYuvMbBuffer );
}
//--
cYuvMbBufferResidual.add( cBaseLayerBuffer );
//--- set CBP ---
rcMbDataAccess.getMbData().setMbExtCbp( rcMbDataAccess.getMbData().getMbExtCbp() | pcMbDataAccessBase->getMbData().getMbExtCbp() );
}
//===== reconstruct signal =====
if( bReconstruct )
{
cYuvMbBuffer.add( cYuvMbBufferResidual );
cYuvMbBuffer.clip();
}
//===== store reconstructed residual =====
if( pcResidual )
{
RNOK( pcResidual->getFullPelYuvBuffer()->loadBuffer( &cYuvMbBufferResidual ) );
}
//===== store reconstructed signal =====
if( pcRecYuvBuffer )
{
RNOK( pcRecYuvBuffer->loadBuffer( &cYuvMbBuffer ) );
}
return Err::m_nOK;
}
ErrVal MbDecoder::xDecodeMbInter( MbDataAccess& rcMbDataAccess,
YuvMbBuffer& rcRecYuvBuffer,
IntYuvMbBuffer& rcPredIntYuvMbBuffer,
IntYuvMbBuffer& rcResIntYuvMbBuffer,
Bool bReconstruct )
{
rcResIntYuvMbBuffer.setAllSamplesToZero();
if( ! bReconstruct )
{
RNOK( m_pcMotionCompensation->calculateMb ( rcMbDataAccess, true ) );
rcRecYuvBuffer.setZero();
}
else
{
RNOK( m_pcMotionCompensation->compensateMb( rcMbDataAccess, &rcRecYuvBuffer, true ) );
}
rcPredIntYuvMbBuffer.loadBuffer( &rcRecYuvBuffer );
MbTransformCoeffs& rcCoeffs = m_cTCoeffs;
m_pcTransform->setClipMode( false );
if( rcMbDataAccess.getMbData().isTransformSize8x8() )
{
for( B8x8Idx cIdx8x8; cIdx8x8.isLegal(); cIdx8x8++ )
{
if( rcMbDataAccess.getMbData().is4x4BlkCoded( cIdx8x8 ) )
{
RNOK( m_pcTransform->invTransform8x8Blk( rcResIntYuvMbBuffer.getYBlk( cIdx8x8 ),
rcResIntYuvMbBuffer.getLStride(),
rcCoeffs.get8x8(cIdx8x8) ) );
}
}
}
else
{
for( B4x4Idx cIdx; cIdx.isLegal(); cIdx++ )
{
if( rcMbDataAccess.getMbData().is4x4BlkCoded( cIdx ) )
{
RNOK( m_pcTransform->invTransform4x4Blk( rcResIntYuvMbBuffer.getYBlk( cIdx ),
rcResIntYuvMbBuffer.getLStride(),
rcCoeffs.get(cIdx) ) );
}
}
}
UInt uiChromaCbp = rcMbDataAccess.getMbData().getCbpChroma4x4();
IntYuvMbBuffer cPredBuffer;
RNOK( xDecodeChroma( rcMbDataAccess, rcResIntYuvMbBuffer, cPredBuffer, uiChromaCbp, false ) );
m_pcTransform->setClipMode( true );
IntYuvMbBuffer cIntYuvMbBuffer;
cIntYuvMbBuffer. loadLuma ( rcPredIntYuvMbBuffer );
cIntYuvMbBuffer. loadChroma ( rcPredIntYuvMbBuffer );
cIntYuvMbBuffer. add ( rcResIntYuvMbBuffer );
rcRecYuvBuffer. loadBufferClip( &cIntYuvMbBuffer );
return Err::m_nOK;
}
