/* 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) 2010-2014, 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 TDecSbac.cpp \brief Context-adaptive entropy decoder class */ #include "TDecSbac.h" #include "TLibCommon/TComTU.h" #if RExt__DECODER_DEBUG_BIT_STATISTICS #include "TLibCommon/TComCodingStatistics.h" // #define RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(a) , a #else #define RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(a) #endif //! \ingroup TLibDecoder //! \{ #if ENVIRONMENT_VARIABLE_DEBUG_AND_TEST #include "../TLibCommon/Debug.h" #endif ////////////////////////////////////////////////////////////////////// // Construction/Destruction ////////////////////////////////////////////////////////////////////// TDecSbac::TDecSbac() // new structure here : m_pcBitstream ( 0 ) , m_pcTDecBinIf ( NULL ) , m_numContextModels ( 0 ) , m_cCUSplitFlagSCModel ( 1, 1, NUM_SPLIT_FLAG_CTX , m_contextModels + m_numContextModels, m_numContextModels) , m_cCUSkipFlagSCModel ( 1, 1, NUM_SKIP_FLAG_CTX , m_contextModels + m_numContextModels, m_numContextModels) , m_cCUMergeFlagExtSCModel ( 1, 1, NUM_MERGE_FLAG_EXT_CTX , m_contextModels + m_numContextModels, m_numContextModels) , m_cCUMergeIdxExtSCModel ( 1, 1, NUM_MERGE_IDX_EXT_CTX , m_contextModels + m_numContextModels, m_numContextModels) , m_cCUPartSizeSCModel ( 1, 1, NUM_PART_SIZE_CTX , m_contextModels + m_numContextModels, m_numContextModels) , m_cCUPredModeSCModel ( 1, 1, NUM_PRED_MODE_CTX , m_contextModels + m_numContextModels, m_numContextModels) , m_cCUIntraPredSCModel ( 1, 1, NUM_ADI_CTX , m_contextModels + m_numContextModels, m_numContextModels) , m_cCUChromaPredSCModel ( 1, 1, NUM_CHROMA_PRED_CTX , m_contextModels + m_numContextModels, m_numContextModels) , m_cCUDeltaQpSCModel ( 1, 1, NUM_DELTA_QP_CTX , m_contextModels + m_numContextModels, m_numContextModels) , m_cCUInterDirSCModel ( 1, 1, NUM_INTER_DIR_CTX , m_contextModels + m_numContextModels, m_numContextModels) , m_cCURefPicSCModel ( 1, 1, NUM_REF_NO_CTX , m_contextModels + m_numContextModels, m_numContextModels) , m_cCUMvdSCModel ( 1, 1, NUM_MV_RES_CTX , m_contextModels + m_numContextModels, m_numContextModels) , m_cCUQtCbfSCModel ( 1, NUM_QT_CBF_CTX_SETS, NUM_QT_CBF_CTX_PER_SET , m_contextModels + m_numContextModels, m_numContextModels) , m_cCUTransSubdivFlagSCModel ( 1, 1, NUM_TRANS_SUBDIV_FLAG_CTX , m_contextModels + m_numContextModels, m_numContextModels) , m_cCUQtRootCbfSCModel ( 1, 1, NUM_QT_ROOT_CBF_CTX , m_contextModels + m_numContextModels, m_numContextModels) , m_cCUSigCoeffGroupSCModel ( 1, 2, NUM_SIG_CG_FLAG_CTX , m_contextModels + m_numContextModels, m_numContextModels) , m_cCUSigSCModel ( 1, 1, NUM_SIG_FLAG_CTX , m_contextModels + m_numContextModels, m_numContextModels) , m_cCuCtxLastX ( 1, NUM_CTX_LAST_FLAG_SETS, NUM_CTX_LAST_FLAG_XY , m_contextModels + m_numContextModels, m_numContextModels) , m_cCuCtxLastY ( 1, NUM_CTX_LAST_FLAG_SETS, NUM_CTX_LAST_FLAG_XY , m_contextModels + m_numContextModels, m_numContextModels) , m_cCUOneSCModel ( 1, 1, NUM_ONE_FLAG_CTX , m_contextModels + m_numContextModels, m_numContextModels) , m_cCUAbsSCModel ( 1, 1, NUM_ABS_FLAG_CTX , m_contextModels + m_numContextModels, m_numContextModels) , m_cMVPIdxSCModel ( 1, 1, NUM_MVP_IDX_CTX , m_contextModels + m_numContextModels, m_numContextModels) , m_cSaoMergeSCModel ( 1, 1, NUM_SAO_MERGE_FLAG_CTX , m_contextModels + m_numContextModels, m_numContextModels) , m_cSaoTypeIdxSCModel ( 1, 1, NUM_SAO_TYPE_IDX_CTX , m_contextModels + m_numContextModels, m_numContextModels) , m_cTransformSkipSCModel ( 1, MAX_NUM_CHANNEL_TYPE, NUM_TRANSFORMSKIP_FLAG_CTX , m_contextModels + m_numContextModels, m_numContextModels) , m_CUTransquantBypassFlagSCModel ( 1, 1, NUM_CU_TRANSQUANT_BYPASS_FLAG_CTX , m_contextModels + m_numContextModels, m_numContextModels) , m_explicitRdpcmFlagSCModel ( 1, MAX_NUM_CHANNEL_TYPE, NUM_EXPLICIT_RDPCM_FLAG_CTX , m_contextModels + m_numContextModels, m_numContextModels) , m_explicitRdpcmDirSCModel ( 1, MAX_NUM_CHANNEL_TYPE, NUM_EXPLICIT_RDPCM_DIR_CTX , m_contextModels + m_numContextModels, m_numContextModels) , m_cCrossComponentPredictionSCModel ( 1, 1, NUM_CROSS_COMPONENT_PREDICTION_CTX , m_contextModels + m_numContextModels, m_numContextModels) , m_ChromaQpAdjFlagSCModel ( 1, 1, NUM_CHROMA_QP_ADJ_FLAG_CTX , m_contextModels + m_numContextModels, m_numContextModels) , m_ChromaQpAdjIdcSCModel ( 1, 1, NUM_CHROMA_QP_ADJ_IDC_CTX , m_contextModels + m_numContextModels, m_numContextModels) { assert( m_numContextModels <= MAX_NUM_CTX_MOD ); } TDecSbac::~TDecSbac() { } // ==================================================================================================================== // Public member functions // ==================================================================================================================== Void TDecSbac::resetEntropy(TComSlice* pSlice) { SliceType sliceType = pSlice->getSliceType(); Int qp = pSlice->getSliceQp(); if (pSlice->getPPS()->getCabacInitPresentFlag() && pSlice->getCabacInitFlag()) { switch (sliceType) { case P_SLICE: // change initialization table to B_SLICE initialization sliceType = B_SLICE; break; case B_SLICE: // change initialization table to P_SLICE initialization sliceType = P_SLICE; break; default : // should not occur assert(0); break; } } m_cCUSplitFlagSCModel.initBuffer ( sliceType, qp, (UChar*)INIT_SPLIT_FLAG ); m_cCUSkipFlagSCModel.initBuffer ( sliceType, qp, (UChar*)INIT_SKIP_FLAG ); m_cCUMergeFlagExtSCModel.initBuffer ( sliceType, qp, (UChar*)INIT_MERGE_FLAG_EXT ); m_cCUMergeIdxExtSCModel.initBuffer ( sliceType, qp, (UChar*)INIT_MERGE_IDX_EXT ); m_cCUPartSizeSCModel.initBuffer ( sliceType, qp, (UChar*)INIT_PART_SIZE ); m_cCUPredModeSCModel.initBuffer ( sliceType, qp, (UChar*)INIT_PRED_MODE ); m_cCUIntraPredSCModel.initBuffer ( sliceType, qp, (UChar*)INIT_INTRA_PRED_MODE ); m_cCUChromaPredSCModel.initBuffer ( sliceType, qp, (UChar*)INIT_CHROMA_PRED_MODE ); m_cCUInterDirSCModel.initBuffer ( sliceType, qp, (UChar*)INIT_INTER_DIR ); m_cCUMvdSCModel.initBuffer ( sliceType, qp, (UChar*)INIT_MVD ); m_cCURefPicSCModel.initBuffer ( sliceType, qp, (UChar*)INIT_REF_PIC ); m_cCUDeltaQpSCModel.initBuffer ( sliceType, qp, (UChar*)INIT_DQP ); m_cCUQtCbfSCModel.initBuffer ( sliceType, qp, (UChar*)INIT_QT_CBF ); m_cCUQtRootCbfSCModel.initBuffer ( sliceType, qp, (UChar*)INIT_QT_ROOT_CBF ); m_cCUSigCoeffGroupSCModel.initBuffer ( sliceType, qp, (UChar*)INIT_SIG_CG_FLAG ); m_cCUSigSCModel.initBuffer ( sliceType, qp, (UChar*)INIT_SIG_FLAG ); m_cCuCtxLastX.initBuffer ( sliceType, qp, (UChar*)INIT_LAST ); m_cCuCtxLastY.initBuffer ( sliceType, qp, (UChar*)INIT_LAST ); m_cCUOneSCModel.initBuffer ( sliceType, qp, (UChar*)INIT_ONE_FLAG ); m_cCUAbsSCModel.initBuffer ( sliceType, qp, (UChar*)INIT_ABS_FLAG ); m_cMVPIdxSCModel.initBuffer ( sliceType, qp, (UChar*)INIT_MVP_IDX ); m_cSaoMergeSCModel.initBuffer ( sliceType, qp, (UChar*)INIT_SAO_MERGE_FLAG ); m_cSaoTypeIdxSCModel.initBuffer ( sliceType, qp, (UChar*)INIT_SAO_TYPE_IDX ); m_cCUTransSubdivFlagSCModel.initBuffer ( sliceType, qp, (UChar*)INIT_TRANS_SUBDIV_FLAG ); m_cTransformSkipSCModel.initBuffer ( sliceType, qp, (UChar*)INIT_TRANSFORMSKIP_FLAG ); m_CUTransquantBypassFlagSCModel.initBuffer ( sliceType, qp, (UChar*)INIT_CU_TRANSQUANT_BYPASS_FLAG ); m_explicitRdpcmFlagSCModel.initBuffer ( sliceType, qp, (UChar*)INIT_EXPLICIT_RDPCM_FLAG); m_explicitRdpcmDirSCModel.initBuffer ( sliceType, qp, (UChar*)INIT_EXPLICIT_RDPCM_DIR); m_cCrossComponentPredictionSCModel.initBuffer ( sliceType, qp, (UChar*)INIT_CROSS_COMPONENT_PREDICTION ); m_ChromaQpAdjFlagSCModel.initBuffer ( sliceType, qp, (UChar*)INIT_CHROMA_QP_ADJ_FLAG ); m_ChromaQpAdjIdcSCModel.initBuffer ( sliceType, qp, (UChar*)INIT_CHROMA_QP_ADJ_IDC ); for (UInt statisticIndex = 0; statisticIndex < RExt__GOLOMB_RICE_ADAPTATION_STATISTICS_SETS ; statisticIndex++) { m_golombRiceAdaptationStatistics[statisticIndex] = 0; } m_pcTDecBinIf->start(); } Void TDecSbac::parseTerminatingBit( UInt& ruiBit ) { m_pcTDecBinIf->decodeBinTrm( ruiBit ); if ( ruiBit == 1 ) { m_pcTDecBinIf->finish(); #if RExt__DECODER_DEBUG_BIT_STATISTICS TComCodingStatistics::IncrementStatisticEP(STATS__TRAILING_BITS, m_pcBitstream->readOutTrailingBits(),0); #else m_pcBitstream->readOutTrailingBits(); #endif } } Void TDecSbac::parseRemainingBytes( Bool noTrailingBytesExpected ) { if (noTrailingBytesExpected) { const UInt numberOfRemainingSubstreamBytes=m_pcBitstream->getNumBitsLeft(); assert (numberOfRemainingSubstreamBytes == 0); } else { while (m_pcBitstream->getNumBitsLeft()) { UInt trailingNullByte=m_pcBitstream->readByte(); if (trailingNullByte!=0) { printf("Trailing byte should be 0, but has value %02x\n", trailingNullByte); assert(trailingNullByte==0); } } } } #if RExt__DECODER_DEBUG_BIT_STATISTICS Void TDecSbac::xReadUnaryMaxSymbol( UInt& ruiSymbol, ContextModel* pcSCModel, Int iOffset, UInt uiMaxSymbol, const class TComCodingStatisticsClassType &whichStat ) #else Void TDecSbac::xReadUnaryMaxSymbol( UInt& ruiSymbol, ContextModel* pcSCModel, Int iOffset, UInt uiMaxSymbol ) #endif { if (uiMaxSymbol == 0) { ruiSymbol = 0; return; } m_pcTDecBinIf->decodeBin( ruiSymbol, pcSCModel[0] RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(whichStat) ); if( ruiSymbol == 0 || uiMaxSymbol == 1 ) { return; } UInt uiSymbol = 0; UInt uiCont; do { m_pcTDecBinIf->decodeBin( uiCont, pcSCModel[ iOffset ] RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(whichStat) ); uiSymbol++; } while( uiCont && ( uiSymbol < uiMaxSymbol - 1 ) ); if( uiCont && ( uiSymbol == uiMaxSymbol - 1 ) ) { uiSymbol++; } ruiSymbol = uiSymbol; } #if RExt__DECODER_DEBUG_BIT_STATISTICS Void TDecSbac::xReadEpExGolomb( UInt& ruiSymbol, UInt uiCount, const class TComCodingStatisticsClassType &whichStat ) #else Void TDecSbac::xReadEpExGolomb( UInt& ruiSymbol, UInt uiCount ) #endif { UInt uiSymbol = 0; UInt uiBit = 1; while( uiBit ) { m_pcTDecBinIf->decodeBinEP( uiBit RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(whichStat) ); uiSymbol += uiBit << uiCount++; } if ( --uiCount ) { UInt bins; m_pcTDecBinIf->decodeBinsEP( bins, uiCount RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(whichStat) ); uiSymbol += bins; } ruiSymbol = uiSymbol; } #if RExt__DECODER_DEBUG_BIT_STATISTICS Void TDecSbac::xReadUnarySymbol( UInt& ruiSymbol, ContextModel* pcSCModel, Int iOffset, const class TComCodingStatisticsClassType &whichStat ) #else Void TDecSbac::xReadUnarySymbol( UInt& ruiSymbol, ContextModel* pcSCModel, Int iOffset ) #endif { m_pcTDecBinIf->decodeBin( ruiSymbol, pcSCModel[0] RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(whichStat)); if( !ruiSymbol ) { return; } UInt uiSymbol = 0; UInt uiCont; do { m_pcTDecBinIf->decodeBin( uiCont, pcSCModel[ iOffset ] RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(whichStat)); uiSymbol++; } while( uiCont ); ruiSymbol = uiSymbol; } /** Parsing of coeff_abs_level_remaing * \param ruiSymbol reference to coeff_abs_level_remaing * \param ruiParam reference to parameter * \returns Void */ #if RExt__DECODER_DEBUG_BIT_STATISTICS Void TDecSbac::xReadCoefRemainExGolomb ( UInt &rSymbol, UInt &rParam, const Bool useLimitedPrefixLength, const ChannelType channelType, const class TComCodingStatisticsClassType &whichStat ) #else Void TDecSbac::xReadCoefRemainExGolomb ( UInt &rSymbol, UInt &rParam, const Bool useLimitedPrefixLength, const ChannelType channelType ) #endif { UInt prefix = 0; UInt codeWord = 0; if (useLimitedPrefixLength) { const UInt longestPossiblePrefix = (32 - (COEF_REMAIN_BIN_REDUCTION + g_maxTrDynamicRange[channelType])) + COEF_REMAIN_BIN_REDUCTION; do { prefix++; m_pcTDecBinIf->decodeBinEP( codeWord RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(whichStat) ); } while((codeWord != 0) && (prefix < longestPossiblePrefix)); } else { do { prefix++; m_pcTDecBinIf->decodeBinEP( codeWord RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(whichStat) ); } while( codeWord); } codeWord = 1 - codeWord; prefix -= codeWord; codeWord=0; if (prefix < COEF_REMAIN_BIN_REDUCTION ) { m_pcTDecBinIf->decodeBinsEP(codeWord,rParam RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(whichStat)); rSymbol = (prefix<decodeBinsEP(codeWord, (suffixLength + rParam) RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(whichStat)); rSymbol = codeWord + ((((1 << prefixLength) - 1) + COEF_REMAIN_BIN_REDUCTION) << rParam); } else { m_pcTDecBinIf->decodeBinsEP(codeWord,prefix-COEF_REMAIN_BIN_REDUCTION+rParam RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(whichStat)); rSymbol = (((1<<(prefix-COEF_REMAIN_BIN_REDUCTION))+COEF_REMAIN_BIN_REDUCTION-1)<decodeBinTrm(uiSymbol); if (uiSymbol == 1) { Bool bIpcmFlag = true; pcCU->setPartSizeSubParts ( SIZE_2Nx2N, uiAbsPartIdx, uiDepth ); pcCU->setSizeSubParts ( g_uiMaxCUWidth>>uiDepth, g_uiMaxCUHeight>>uiDepth, uiAbsPartIdx, uiDepth ); pcCU->setTrIdxSubParts ( 0, uiAbsPartIdx, uiDepth ); pcCU->setIPCMFlagSubParts ( bIpcmFlag, uiAbsPartIdx, uiDepth ); const UInt minCoeffSizeY = pcCU->getPic()->getMinCUWidth() * pcCU->getPic()->getMinCUHeight(); const UInt offsetY = minCoeffSizeY * uiAbsPartIdx; for (UInt ch=0; ch < pcCU->getPic()->getNumberValidComponents(); ch++) { const ComponentID compID = ComponentID(ch); const UInt offset = offsetY >> (pcCU->getPic()->getComponentScaleX(compID) + pcCU->getPic()->getComponentScaleY(compID)); Pel * pPCMSample = pcCU->getPCMSample(compID) + offset; const UInt width = pcCU->getWidth (uiAbsPartIdx) >> pcCU->getPic()->getComponentScaleX(compID); const UInt height = pcCU->getHeight(uiAbsPartIdx) >> pcCU->getPic()->getComponentScaleY(compID); const UInt sampleBits = pcCU->getSlice()->getSPS()->getPCMBitDepth(toChannelType(compID)); for (UInt y=0; yxReadPCMCode(sampleBits, sample); pPCMSample[x] = sample; } pPCMSample += width; } } m_pcTDecBinIf->start(); } } Void TDecSbac::parseCUTransquantBypassFlag( TComDataCU* pcCU, UInt uiAbsPartIdx, UInt uiDepth ) { UInt uiSymbol; m_pcTDecBinIf->decodeBin( uiSymbol, m_CUTransquantBypassFlagSCModel.get( 0, 0, 0 ) RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(STATS__CABAC_BITS__TQ_BYPASS_FLAG) ); pcCU->setCUTransquantBypassSubParts(uiSymbol ? true : false, uiAbsPartIdx, uiDepth); } /** parse skip flag * \param pcCU * \param uiAbsPartIdx * \param uiDepth * \returns Void */ Void TDecSbac::parseSkipFlag( TComDataCU* pcCU, UInt uiAbsPartIdx, UInt uiDepth ) { if( pcCU->getSlice()->isIntra() ) { return; } UInt uiSymbol = 0; UInt uiCtxSkip = pcCU->getCtxSkipFlag( uiAbsPartIdx ); m_pcTDecBinIf->decodeBin( uiSymbol, m_cCUSkipFlagSCModel.get( 0, 0, uiCtxSkip ) RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(STATS__CABAC_BITS__SKIP_FLAG) ); DTRACE_CABAC_VL( g_nSymbolCounter++ ); DTRACE_CABAC_T( "\tSkipFlag" ); DTRACE_CABAC_T( "\tuiCtxSkip: "); DTRACE_CABAC_V( uiCtxSkip ); DTRACE_CABAC_T( "\tuiSymbol: "); DTRACE_CABAC_V( uiSymbol ); DTRACE_CABAC_T( "\n"); if( uiSymbol ) { pcCU->setSkipFlagSubParts( true, uiAbsPartIdx, uiDepth ); pcCU->setPredModeSubParts( MODE_INTER, uiAbsPartIdx, uiDepth ); pcCU->setPartSizeSubParts( SIZE_2Nx2N, uiAbsPartIdx, uiDepth ); pcCU->setSizeSubParts( g_uiMaxCUWidth>>uiDepth, g_uiMaxCUHeight>>uiDepth, uiAbsPartIdx, uiDepth ); pcCU->setMergeFlagSubParts( true , uiAbsPartIdx, 0, uiDepth ); } } /** parse merge flag * \param pcCU * \param uiAbsPartIdx * \param uiDepth * \param uiPUIdx * \returns Void */ Void TDecSbac::parseMergeFlag ( TComDataCU* pcCU, UInt uiAbsPartIdx, UInt uiDepth, UInt uiPUIdx ) { UInt uiSymbol; m_pcTDecBinIf->decodeBin( uiSymbol, *m_cCUMergeFlagExtSCModel.get( 0 ) RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(STATS__CABAC_BITS__MERGE_FLAG) ); pcCU->setMergeFlagSubParts( uiSymbol ? true : false, uiAbsPartIdx, uiPUIdx, uiDepth ); DTRACE_CABAC_VL( g_nSymbolCounter++ ); DTRACE_CABAC_T( "\tMergeFlag: " ); DTRACE_CABAC_V( uiSymbol ); DTRACE_CABAC_T( "\tAddress: " ); DTRACE_CABAC_V( pcCU->getCtuRsAddr() ); DTRACE_CABAC_T( "\tuiAbsPartIdx: " ); DTRACE_CABAC_V( uiAbsPartIdx ); DTRACE_CABAC_T( "\n" ); } Void TDecSbac::parseMergeIndex ( TComDataCU* pcCU, UInt& ruiMergeIndex ) { UInt uiUnaryIdx = 0; UInt uiNumCand = pcCU->getSlice()->getMaxNumMergeCand(); if ( uiNumCand > 1 ) { for( ; uiUnaryIdx < uiNumCand - 1; ++uiUnaryIdx ) { UInt uiSymbol = 0; if ( uiUnaryIdx==0 ) { m_pcTDecBinIf->decodeBin( uiSymbol, m_cCUMergeIdxExtSCModel.get( 0, 0, 0 ) RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(STATS__CABAC_BITS__MERGE_INDEX) ); } else { m_pcTDecBinIf->decodeBinEP( uiSymbol RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(STATS__CABAC_BITS__MERGE_INDEX) ); } if( uiSymbol == 0 ) { break; } } } ruiMergeIndex = uiUnaryIdx; DTRACE_CABAC_VL( g_nSymbolCounter++ ) DTRACE_CABAC_T( "\tparseMergeIndex()" ) DTRACE_CABAC_T( "\tuiMRGIdx= " ) DTRACE_CABAC_V( ruiMergeIndex ) DTRACE_CABAC_T( "\n" ) } Void TDecSbac::parseMVPIdx ( Int& riMVPIdx ) { UInt uiSymbol; xReadUnaryMaxSymbol(uiSymbol, m_cMVPIdxSCModel.get(0), 1, AMVP_MAX_NUM_CANDS-1 RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(STATS__CABAC_BITS__MVP_IDX) ); riMVPIdx = uiSymbol; } Void TDecSbac::parseSplitFlag ( TComDataCU* pcCU, UInt uiAbsPartIdx, UInt uiDepth ) { if( uiDepth == g_uiMaxCUDepth - g_uiAddCUDepth ) { pcCU->setDepthSubParts( uiDepth, uiAbsPartIdx ); return; } #if RExt__DECODER_DEBUG_BIT_STATISTICS const TComCodingStatisticsClassType ctype(STATS__CABAC_BITS__SPLIT_FLAG, g_aucConvertToBit[g_uiMaxCUWidth>>uiDepth]+2); #endif UInt uiSymbol; m_pcTDecBinIf->decodeBin( uiSymbol, m_cCUSplitFlagSCModel.get( 0, 0, pcCU->getCtxSplitFlag( uiAbsPartIdx, uiDepth ) ) RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(ctype) ); DTRACE_CABAC_VL( g_nSymbolCounter++ ) DTRACE_CABAC_T( "\tSplitFlag\n" ) pcCU->setDepthSubParts( uiDepth + uiSymbol, uiAbsPartIdx ); return; } /** parse partition size * \param pcCU * \param uiAbsPartIdx * \param uiDepth * \returns Void */ Void TDecSbac::parsePartSize( TComDataCU* pcCU, UInt uiAbsPartIdx, UInt uiDepth ) { UInt uiSymbol, uiMode = 0; PartSize eMode; #if RExt__DECODER_DEBUG_BIT_STATISTICS const TComCodingStatisticsClassType ctype(STATS__CABAC_BITS__PART_SIZE, g_aucConvertToBit[g_uiMaxCUWidth>>uiDepth]+2); #endif if ( pcCU->isIntra( uiAbsPartIdx ) ) { uiSymbol = 1; if( uiDepth == g_uiMaxCUDepth - g_uiAddCUDepth ) { m_pcTDecBinIf->decodeBin( uiSymbol, m_cCUPartSizeSCModel.get( 0, 0, 0) RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(ctype) ); } eMode = uiSymbol ? SIZE_2Nx2N : SIZE_NxN; UInt uiTrLevel = 0; UInt uiWidthInBit = g_aucConvertToBit[pcCU->getWidth(uiAbsPartIdx)]+2; UInt uiTrSizeInBit = g_aucConvertToBit[pcCU->getSlice()->getSPS()->getMaxTrSize()]+2; uiTrLevel = uiWidthInBit >= uiTrSizeInBit ? uiWidthInBit - uiTrSizeInBit : 0; if( eMode == SIZE_NxN ) { pcCU->setTrIdxSubParts( 1+uiTrLevel, uiAbsPartIdx, uiDepth ); } else { pcCU->setTrIdxSubParts( uiTrLevel, uiAbsPartIdx, uiDepth ); } } else { UInt uiMaxNumBits = 2; if( uiDepth == g_uiMaxCUDepth - g_uiAddCUDepth && !( (g_uiMaxCUWidth>>uiDepth) == 8 && (g_uiMaxCUHeight>>uiDepth) == 8 ) ) { uiMaxNumBits ++; } for ( UInt ui = 0; ui < uiMaxNumBits; ui++ ) { m_pcTDecBinIf->decodeBin( uiSymbol, m_cCUPartSizeSCModel.get( 0, 0, ui) RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(ctype) ); if ( uiSymbol ) { break; } uiMode++; } eMode = (PartSize) uiMode; if ( pcCU->getSlice()->getSPS()->getAMPAcc( uiDepth ) ) { if (eMode == SIZE_2NxN) { m_pcTDecBinIf->decodeBin(uiSymbol, m_cCUPartSizeSCModel.get( 0, 0, 3 ) RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(ctype)); if (uiSymbol == 0) { m_pcTDecBinIf->decodeBinEP(uiSymbol RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(ctype) ); eMode = (uiSymbol == 0? SIZE_2NxnU : SIZE_2NxnD); } } else if (eMode == SIZE_Nx2N) { m_pcTDecBinIf->decodeBin(uiSymbol, m_cCUPartSizeSCModel.get( 0, 0, 3 ) RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(ctype) ); if (uiSymbol == 0) { m_pcTDecBinIf->decodeBinEP(uiSymbol RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(ctype) ); eMode = (uiSymbol == 0? SIZE_nLx2N : SIZE_nRx2N); } } } } pcCU->setPartSizeSubParts( eMode, uiAbsPartIdx, uiDepth ); pcCU->setSizeSubParts( g_uiMaxCUWidth>>uiDepth, g_uiMaxCUHeight>>uiDepth, uiAbsPartIdx, uiDepth ); } /** parse prediction mode * \param pcCU * \param uiAbsPartIdx * \param uiDepth * \returns Void */ Void TDecSbac::parsePredMode( TComDataCU* pcCU, UInt uiAbsPartIdx, UInt uiDepth ) { if( pcCU->getSlice()->isIntra() ) { pcCU->setPredModeSubParts( MODE_INTRA, uiAbsPartIdx, uiDepth ); return; } UInt uiSymbol; Int iPredMode = MODE_INTER; m_pcTDecBinIf->decodeBin( uiSymbol, m_cCUPredModeSCModel.get( 0, 0, 0 ) RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(STATS__CABAC_BITS__PRED_MODE) ); iPredMode += uiSymbol; pcCU->setPredModeSubParts( (PredMode)iPredMode, uiAbsPartIdx, uiDepth ); } Void TDecSbac::parseIntraDirLumaAng ( TComDataCU* pcCU, UInt absPartIdx, UInt depth ) { PartSize mode = pcCU->getPartitionSize( absPartIdx ); UInt partNum = mode==SIZE_NxN?4:1; UInt partOffset = ( pcCU->getPic()->getNumPartitionsInCtu() >> ( pcCU->getDepth(absPartIdx) << 1 ) ) >> 2; UInt mpmPred[4],symbol; Int j,intraPredMode; if (mode==SIZE_NxN) { depth++; } #if RExt__DECODER_DEBUG_BIT_STATISTICS const TComCodingStatisticsClassType ctype(STATS__CABAC_BITS__INTRA_DIR_ANG, g_aucConvertToBit[g_uiMaxCUWidth>>depth]+2, CHANNEL_TYPE_LUMA); #endif for (j=0;jdecodeBin( symbol, m_cCUIntraPredSCModel.get( 0, 0, 0) RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(ctype) ); mpmPred[j] = symbol; } for (j=0;jgetIntraDirPredictor(absPartIdx+partOffset*j, preds, COMPONENT_Y); if (mpmPred[j]) { m_pcTDecBinIf->decodeBinEP( symbol RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(ctype) ); if (symbol) { m_pcTDecBinIf->decodeBinEP( symbol RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(ctype) ); symbol++; } intraPredMode = preds[symbol]; } else { m_pcTDecBinIf->decodeBinsEP( symbol, 5 RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(ctype) ); intraPredMode = symbol; //postponed sorting of MPMs (only in remaining branch) assert(predNum>=3); // It is currently always 3! if (preds[0] > preds[1]) { std::swap(preds[0], preds[1]); } if (preds[0] > preds[2]) { std::swap(preds[0], preds[2]); } if (preds[1] > preds[2]) { std::swap(preds[1], preds[2]); } for ( Int i = 0; i < predNum; i++ ) { intraPredMode += ( intraPredMode >= preds[i] ); } } pcCU->setIntraDirSubParts(CHANNEL_TYPE_LUMA, (UChar)intraPredMode, absPartIdx+partOffset*j, depth ); } } Void TDecSbac::parseIntraDirChroma( TComDataCU* pcCU, UInt uiAbsPartIdx, UInt uiDepth ) { UInt uiSymbol; #if RExt__DECODER_DEBUG_BIT_STATISTICS const TComCodingStatisticsClassType ctype(STATS__CABAC_BITS__INTRA_DIR_ANG, g_aucConvertToBit[g_uiMaxCUWidth>>uiDepth]+2, CHANNEL_TYPE_CHROMA); #endif m_pcTDecBinIf->decodeBin( uiSymbol, m_cCUChromaPredSCModel.get( 0, 0, 0 ) RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(ctype) ); if( uiSymbol == 0 ) { uiSymbol = DM_CHROMA_IDX; } else { UInt uiIPredMode; m_pcTDecBinIf->decodeBinsEP( uiIPredMode, 2 RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(ctype) ); UInt uiAllowedChromaDir[ NUM_CHROMA_MODE ]; pcCU->getAllowedChromaDir( uiAbsPartIdx, uiAllowedChromaDir ); uiSymbol = uiAllowedChromaDir[ uiIPredMode ]; } pcCU->setIntraDirSubParts( CHANNEL_TYPE_CHROMA, uiSymbol, uiAbsPartIdx, uiDepth ); } Void TDecSbac::parseInterDir( TComDataCU* pcCU, UInt& ruiInterDir, UInt uiAbsPartIdx ) { UInt uiSymbol; const UInt uiCtx = pcCU->getCtxInterDir( uiAbsPartIdx ); ContextModel *pCtx = m_cCUInterDirSCModel.get( 0 ); uiSymbol = 0; if (pcCU->getPartitionSize(uiAbsPartIdx) == SIZE_2Nx2N || pcCU->getHeight(uiAbsPartIdx) != 8 ) { m_pcTDecBinIf->decodeBin( uiSymbol, *( pCtx + uiCtx ) RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(STATS__CABAC_BITS__INTER_DIR) ); } if( uiSymbol ) { uiSymbol = 2; } else { m_pcTDecBinIf->decodeBin( uiSymbol, *( pCtx + 4 ) RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(STATS__CABAC_BITS__INTER_DIR) ); assert(uiSymbol == 0 || uiSymbol == 1); } uiSymbol++; ruiInterDir = uiSymbol; return; } Void TDecSbac::parseRefFrmIdx( TComDataCU* pcCU, Int& riRefFrmIdx, RefPicList eRefList ) { UInt uiSymbol; ContextModel *pCtx = m_cCURefPicSCModel.get( 0 ); m_pcTDecBinIf->decodeBin( uiSymbol, *pCtx RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(STATS__CABAC_BITS__REF_FRM_IDX) ); if( uiSymbol ) { UInt uiRefNum = pcCU->getSlice()->getNumRefIdx( eRefList ) - 2; pCtx++; UInt ui; for( ui = 0; ui < uiRefNum; ++ui ) { if( ui == 0 ) { m_pcTDecBinIf->decodeBin( uiSymbol, *pCtx RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(STATS__CABAC_BITS__REF_FRM_IDX) ); } else { m_pcTDecBinIf->decodeBinEP( uiSymbol RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(STATS__CABAC_BITS__REF_FRM_IDX) ); } if( uiSymbol == 0 ) { break; } } uiSymbol = ui + 1; } riRefFrmIdx = uiSymbol; return; } Void TDecSbac::parseMvd( TComDataCU* pcCU, UInt uiAbsPartIdx, UInt uiPartIdx, UInt uiDepth, RefPicList eRefList ) { UInt uiSymbol; UInt uiHorAbs; UInt uiVerAbs; UInt uiHorSign = 0; UInt uiVerSign = 0; ContextModel *pCtx = m_cCUMvdSCModel.get( 0 ); if(pcCU->getSlice()->getMvdL1ZeroFlag() && eRefList == REF_PIC_LIST_1 && pcCU->getInterDir(uiAbsPartIdx)==3) { uiHorAbs=0; uiVerAbs=0; } else { m_pcTDecBinIf->decodeBin( uiHorAbs, *pCtx RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(STATS__CABAC_BITS__MVD) ); m_pcTDecBinIf->decodeBin( uiVerAbs, *pCtx RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(STATS__CABAC_BITS__MVD) ); const Bool bHorAbsGr0 = uiHorAbs != 0; const Bool bVerAbsGr0 = uiVerAbs != 0; pCtx++; if( bHorAbsGr0 ) { m_pcTDecBinIf->decodeBin( uiSymbol, *pCtx RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(STATS__CABAC_BITS__MVD) ); uiHorAbs += uiSymbol; } if( bVerAbsGr0 ) { m_pcTDecBinIf->decodeBin( uiSymbol, *pCtx RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(STATS__CABAC_BITS__MVD) ); uiVerAbs += uiSymbol; } if( bHorAbsGr0 ) { if( 2 == uiHorAbs ) { xReadEpExGolomb( uiSymbol, 1 RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(STATS__CABAC_BITS__MVD_EP) ); uiHorAbs += uiSymbol; } m_pcTDecBinIf->decodeBinEP( uiHorSign RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(STATS__CABAC_BITS__MVD_EP) ); } if( bVerAbsGr0 ) { if( 2 == uiVerAbs ) { xReadEpExGolomb( uiSymbol, 1 RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(STATS__CABAC_BITS__MVD_EP) ); uiVerAbs += uiSymbol; } m_pcTDecBinIf->decodeBinEP( uiVerSign RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(STATS__CABAC_BITS__MVD_EP) ); } } const TComMv cMv( uiHorSign ? -Int( uiHorAbs ): uiHorAbs, uiVerSign ? -Int( uiVerAbs ) : uiVerAbs ); pcCU->getCUMvField( eRefList )->setAllMvd( cMv, pcCU->getPartitionSize( uiAbsPartIdx ), uiAbsPartIdx, uiDepth, uiPartIdx ); return; } Void TDecSbac::parseCrossComponentPrediction( TComTU &rTu, ComponentID compID ) { TComDataCU *pcCU = rTu.getCU(); if( isLuma(compID) || !pcCU->getSlice()->getPPS()->getUseCrossComponentPrediction() ) return; const UInt uiAbsPartIdx = rTu.GetAbsPartIdxTU(); if (!pcCU->isIntra(uiAbsPartIdx) || (pcCU->getIntraDir( CHANNEL_TYPE_CHROMA, uiAbsPartIdx ) == DM_CHROMA_IDX)) { Char alpha = 0; UInt symbol = 0; DTRACE_CABAC_VL( g_nSymbolCounter++ ) DTRACE_CABAC_T("\tparseCrossComponentPrediction()") DTRACE_CABAC_T( "\tAddr=" ) DTRACE_CABAC_V( compID ) DTRACE_CABAC_T( "\tuiAbsPartIdx=" ) DTRACE_CABAC_V( uiAbsPartIdx ) #if RExt__DECODER_DEBUG_BIT_STATISTICS TComCodingStatisticsClassType ctype(STATS__CABAC_BITS__CROSS_COMPONENT_PREDICTION, (g_aucConvertToBit[rTu.getRect(compID).width] + 2), compID); #endif ContextModel *pCtx = m_cCrossComponentPredictionSCModel.get(0, 0) + ((compID == COMPONENT_Cr) ? (NUM_CROSS_COMPONENT_PREDICTION_CTX >> 1) : 0); m_pcTDecBinIf->decodeBin( symbol, pCtx[0] RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(ctype) ); if(symbol != 0) { // Cross-component prediction alpha is non-zero. UInt sign = 0; m_pcTDecBinIf->decodeBin( symbol, pCtx[1] RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(ctype) ); if (symbol != 0) { // alpha is 2 (symbol=1), 4(symbol=2) or 8(symbol=3). // Read up to two more bits xReadUnaryMaxSymbol( symbol, (pCtx + 2), 1, 2 RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(ctype) ); symbol += 1; } m_pcTDecBinIf->decodeBin( sign, pCtx[4] RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(ctype) ); alpha = (sign != 0) ? -(1 << symbol) : (1 << symbol); } DTRACE_CABAC_T( "\tAlpha=" ) DTRACE_CABAC_V( alpha ) DTRACE_CABAC_T( "\n" ) pcCU->setCrossComponentPredictionAlphaPartRange( alpha, compID, uiAbsPartIdx, rTu.GetAbsPartIdxNumParts( compID ) ); } } Void TDecSbac::parseTransformSubdivFlag( UInt& ruiSubdivFlag, UInt uiLog2TransformBlockSize ) { m_pcTDecBinIf->decodeBin( ruiSubdivFlag, m_cCUTransSubdivFlagSCModel.get( 0, 0, uiLog2TransformBlockSize ) RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(TComCodingStatisticsClassType(STATS__CABAC_BITS__TRANSFORM_SUBDIV_FLAG, 5-uiLog2TransformBlockSize)) ); DTRACE_CABAC_VL( g_nSymbolCounter++ ) DTRACE_CABAC_T( "\tparseTransformSubdivFlag()" ) DTRACE_CABAC_T( "\tsymbol=" ) DTRACE_CABAC_V( ruiSubdivFlag ) DTRACE_CABAC_T( "\tctx=" ) DTRACE_CABAC_V( uiLog2TransformBlockSize ) DTRACE_CABAC_T( "\n" ) } Void TDecSbac::parseQtRootCbf( UInt uiAbsPartIdx, UInt& uiQtRootCbf ) { UInt uiSymbol; const UInt uiCtx = 0; m_pcTDecBinIf->decodeBin( uiSymbol , m_cCUQtRootCbfSCModel.get( 0, 0, uiCtx ) RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(STATS__CABAC_BITS__QT_ROOT_CBF) ); DTRACE_CABAC_VL( g_nSymbolCounter++ ) DTRACE_CABAC_T( "\tparseQtRootCbf()" ) DTRACE_CABAC_T( "\tsymbol=" ) DTRACE_CABAC_V( uiSymbol ) DTRACE_CABAC_T( "\tctx=" ) DTRACE_CABAC_V( uiCtx ) DTRACE_CABAC_T( "\tuiAbsPartIdx=" ) DTRACE_CABAC_V( uiAbsPartIdx ) DTRACE_CABAC_T( "\n" ) uiQtRootCbf = uiSymbol; } Void TDecSbac::parseDeltaQP( TComDataCU* pcCU, UInt uiAbsPartIdx, UInt uiDepth ) { Int qp; UInt uiDQp; Int iDQp; UInt uiSymbol; xReadUnaryMaxSymbol (uiDQp, &m_cCUDeltaQpSCModel.get( 0, 0, 0 ), 1, CU_DQP_TU_CMAX RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(STATS__CABAC_BITS__DELTA_QP_EP) ); if( uiDQp >= CU_DQP_TU_CMAX) { xReadEpExGolomb( uiSymbol, CU_DQP_EG_k RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(STATS__CABAC_BITS__DELTA_QP_EP)); uiDQp+=uiSymbol; } if ( uiDQp > 0 ) { UInt uiSign; #if SVC_EXTENSION Int qpBdOffsetY = pcCU->getSlice()->getQpBDOffsetY(); #else Int qpBdOffsetY = pcCU->getSlice()->getSPS()->getQpBDOffset(CHANNEL_TYPE_LUMA); #endif m_pcTDecBinIf->decodeBinEP(uiSign RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(STATS__CABAC_BITS__DELTA_QP_EP)); iDQp = uiDQp; if(uiSign) { iDQp = -iDQp; } qp = (((Int) pcCU->getRefQP( uiAbsPartIdx ) + iDQp + 52 + 2*qpBdOffsetY )%(52+qpBdOffsetY)) - qpBdOffsetY; } else { qp = pcCU->getRefQP(uiAbsPartIdx); } pcCU->setQPSubParts(qp, uiAbsPartIdx, uiDepth); pcCU->setCodedQP(qp); } /** parse chroma qp adjustment, converting to the internal table representation. * \returns Void */ Void TDecSbac::parseChromaQpAdjustment( TComDataCU* cu, UInt absPartIdx, UInt depth ) { UInt symbol; #if RExt__DECODER_DEBUG_BIT_STATISTICS const TComCodingStatisticsClassType ctype(STATS__CABAC_BITS__CHROMA_QP_ADJUSTMENT, g_aucConvertToBit[g_uiMaxCUWidth>>depth]+2, CHANNEL_TYPE_CHROMA); #endif Int tableSize = cu->getSlice()->getPPS()->getChromaQpAdjTableSize(); /* cu_chroma_qp_adjustment_flag */ m_pcTDecBinIf->decodeBin( symbol, m_ChromaQpAdjFlagSCModel.get( 0, 0, 0 ) RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(ctype) ); if (symbol && tableSize > 1) { /* cu_chroma_qp_adjustment_idc */ xReadUnaryMaxSymbol( symbol, &m_ChromaQpAdjIdcSCModel.get( 0, 0, 0 ), 0, tableSize - 1 RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(ctype) ); symbol++; } /* NB, symbol = 0 if outer flag is not set, * 1 if outer flag is set and there is no inner flag * 1+ otherwise */ cu->setChromaQpAdjSubParts( symbol, absPartIdx, depth ); cu->setCodedChromaQpAdj(symbol); } Void TDecSbac::parseQtCbf( TComTU &rTu, const ComponentID compID, const Bool lowestLevel ) { TComDataCU* pcCU = rTu.getCU(); const UInt absPartIdx = rTu.GetAbsPartIdxTU(compID); const UInt TUDepth = rTu.GetTransformDepthRel(); const UInt uiCtx = pcCU->getCtxQtCbf( rTu, toChannelType(compID) ); const UInt contextSet = toChannelType(compID); const UInt width = rTu.getRect(compID).width; const UInt height = rTu.getRect(compID).height; const Bool canQuadSplit = (width >= (MIN_TU_SIZE * 2)) && (height >= (MIN_TU_SIZE * 2)); const UInt coveredPartIdxes = rTu.GetAbsPartIdxNumParts(compID); // Since the CBF for chroma is coded at the highest level possible, if sub-TUs are // to be coded for a 4x8 chroma TU, their CBFs must be coded at the highest 4x8 level // (i.e. where luma TUs are 8x8 rather than 4x4) // ___ ___ // | | | <- 4 x (8x8 luma + 4x8 4:2:2 chroma) // |___|___| each quadrant has its own chroma CBF // | | | _ _ _ _ // |___|___| | // <--16---> V // _ _ // |_|_| <- 4 x 4x4 luma + 1 x 4x8 4:2:2 chroma // |_|_| no chroma CBF is coded - instead the parent CBF is inherited // <-8-> if sub-TUs are present, their CBFs had to be coded at the parent level const UInt lowestTUDepth = TUDepth + ((!lowestLevel && !canQuadSplit) ? 1 : 0); //unsplittable TUs inherit their parent's CBF UInt lowestTUCBF = 0; if ((width != height) && (lowestLevel || !canQuadSplit)) //if sub-TUs are present { const UInt subTUDepth = lowestTUDepth + 1; const UInt partIdxesPerSubTU = rTu.GetAbsPartIdxNumParts(compID) >> 1; UInt combinedSubTUCBF = 0; for (UInt subTU = 0; subTU < 2; subTU++) { UInt uiCbf = MAX_UINT; m_pcTDecBinIf->decodeBin(uiCbf, m_cCUQtCbfSCModel.get(0, contextSet, uiCtx) RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(TComCodingStatisticsClassType(STATS__CABAC_BITS__QT_CBF, g_aucConvertToBit[rTu.getRect(compID).width]+2, compID))); const UInt subTUAbsPartIdx = absPartIdx + (subTU * partIdxesPerSubTU); pcCU->setCbfPartRange((uiCbf << subTUDepth), compID, subTUAbsPartIdx, partIdxesPerSubTU); combinedSubTUCBF |= uiCbf; DTRACE_CABAC_VL( g_nSymbolCounter++ ) DTRACE_CABAC_T( "\tparseQtCbf()" ) DTRACE_CABAC_T( "\tsub-TU=" ) DTRACE_CABAC_V( subTU ) DTRACE_CABAC_T( "\tsymbol=" ) DTRACE_CABAC_V( uiCbf ) DTRACE_CABAC_T( "\tctx=" ) DTRACE_CABAC_V( uiCtx ) DTRACE_CABAC_T( "\tetype=" ) DTRACE_CABAC_V( compID ) DTRACE_CABAC_T( "\tuiAbsPartIdx=" ) DTRACE_CABAC_V( subTUAbsPartIdx ) DTRACE_CABAC_T( "\n" ) } //propagate the sub-TU CBF up to the lowest TU level if (combinedSubTUCBF != 0) { pcCU->bitwiseOrCbfPartRange((combinedSubTUCBF << lowestTUDepth), compID, absPartIdx, coveredPartIdxes); lowestTUCBF = combinedSubTUCBF; } } else { UInt uiCbf = MAX_UINT; m_pcTDecBinIf->decodeBin(uiCbf, m_cCUQtCbfSCModel.get(0, contextSet, uiCtx) RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(TComCodingStatisticsClassType(STATS__CABAC_BITS__QT_CBF, g_aucConvertToBit[rTu.getRect(compID).width]+2, compID))); pcCU->setCbfSubParts((uiCbf << lowestTUDepth), compID, absPartIdx, rTu.GetTransformDepthTotalAdj(compID)); DTRACE_CABAC_VL( g_nSymbolCounter++ ) DTRACE_CABAC_T( "\tparseQtCbf()" ) DTRACE_CABAC_T( "\tsymbol=" ) DTRACE_CABAC_V( uiCbf ) DTRACE_CABAC_T( "\tctx=" ) DTRACE_CABAC_V( uiCtx ) DTRACE_CABAC_T( "\tetype=" ) DTRACE_CABAC_V( compID ) DTRACE_CABAC_T( "\tuiAbsPartIdx=" ) DTRACE_CABAC_V( rTu.GetAbsPartIdxTU(compID) ) DTRACE_CABAC_T( "\n" ) lowestTUCBF = uiCbf; } //propagate the lowest level CBF up to the current level if (lowestTUCBF != 0) { for (UInt depth = TUDepth; depth < lowestTUDepth; depth++) { pcCU->bitwiseOrCbfPartRange((lowestTUCBF << depth), compID, absPartIdx, coveredPartIdxes); } } } Void TDecSbac::parseTransformSkipFlags (TComTU &rTu, ComponentID component) { TComDataCU* pcCU=rTu.getCU(); UInt uiAbsPartIdx=rTu.GetAbsPartIdxTU(component); if (pcCU->getCUTransquantBypass(uiAbsPartIdx)) { return; } if (!TUCompRectHasAssociatedTransformSkipFlag(rTu.getRect(component), pcCU->getSlice()->getPPS()->getTransformSkipLog2MaxSize())) { return; } UInt useTransformSkip; m_pcTDecBinIf->decodeBin( useTransformSkip , m_cTransformSkipSCModel.get( 0, toChannelType(component), 0 ) RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(TComCodingStatisticsClassType(STATS__CABAC_BITS__TRANSFORM_SKIP_FLAGS, component)) ); DTRACE_CABAC_VL( g_nSymbolCounter++ ) DTRACE_CABAC_T("\tparseTransformSkip()"); DTRACE_CABAC_T( "\tsymbol=" ) DTRACE_CABAC_V( useTransformSkip ) DTRACE_CABAC_T( "\tAddr=" ) DTRACE_CABAC_V( pcCU->getCtuRsAddr() ) DTRACE_CABAC_T( "\tetype=" ) DTRACE_CABAC_V( component ) DTRACE_CABAC_T( "\tuiAbsPartIdx=" ) DTRACE_CABAC_V( rTu.GetAbsPartIdxTU() ) DTRACE_CABAC_T( "\n" ) pcCU->setTransformSkipPartRange( useTransformSkip, component, uiAbsPartIdx, rTu.GetAbsPartIdxNumParts(component)); } /** Parse (X,Y) position of the last significant coefficient * \param uiPosLastX reference to X component of last coefficient * \param uiPosLastY reference to Y component of last coefficient * \param width Block width * \param height Block height * \param eTType plane type / luminance or chrominance * \param uiScanIdx scan type (zig-zag, hor, ver) * * This method decodes the X and Y component within a block of the last significant coefficient. */ Void TDecSbac::parseLastSignificantXY( UInt& uiPosLastX, UInt& uiPosLastY, Int width, Int height, ComponentID component, UInt uiScanIdx ) { UInt uiLast; ContextModel *pCtxX = m_cCuCtxLastX.get( 0, toChannelType(component) ); ContextModel *pCtxY = m_cCuCtxLastY.get( 0, toChannelType(component) ); #if RExt__DECODER_DEBUG_BIT_STATISTICS TComCodingStatisticsClassType ctype(STATS__CABAC_BITS__LAST_SIG_X_Y, g_aucConvertToBit[width]+2, component); #endif if ( uiScanIdx == SCAN_VER ) { swap( width, height ); } Int blkSizeOffsetX, blkSizeOffsetY, shiftX, shiftY; getLastSignificantContextParameters(component, width, height, blkSizeOffsetX, blkSizeOffsetY, shiftX, shiftY); //------------------ // posX for( uiPosLastX = 0; uiPosLastX < g_uiGroupIdx[ width - 1 ]; uiPosLastX++ ) { m_pcTDecBinIf->decodeBin( uiLast, *( pCtxX + blkSizeOffsetX + (uiPosLastX >>shiftX) ) RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(ctype) ); if( !uiLast ) { break; } } // posY for( uiPosLastY = 0; uiPosLastY < g_uiGroupIdx[ height - 1 ]; uiPosLastY++ ) { m_pcTDecBinIf->decodeBin( uiLast, *( pCtxY + blkSizeOffsetY + (uiPosLastY >>shiftY)) RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(ctype) ); if( !uiLast ) { break; } } // EP-coded part if ( uiPosLastX > 3 ) { UInt uiTemp = 0; UInt uiCount = ( uiPosLastX - 2 ) >> 1; for ( Int i = uiCount - 1; i >= 0; i-- ) { m_pcTDecBinIf->decodeBinEP( uiLast RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(ctype) ); uiTemp += uiLast << i; } uiPosLastX = g_uiMinInGroup[ uiPosLastX ] + uiTemp; } if ( uiPosLastY > 3 ) { UInt uiTemp = 0; UInt uiCount = ( uiPosLastY - 2 ) >> 1; for ( Int i = uiCount - 1; i >= 0; i-- ) { m_pcTDecBinIf->decodeBinEP( uiLast RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(ctype) ); uiTemp += uiLast << i; } uiPosLastY = g_uiMinInGroup[ uiPosLastY ] + uiTemp; } if( uiScanIdx == SCAN_VER ) { swap( uiPosLastX, uiPosLastY ); } } Void TDecSbac::parseCoeffNxN( TComTU &rTu, ComponentID compID ) { TComDataCU* pcCU=rTu.getCU(); const UInt uiAbsPartIdx=rTu.GetAbsPartIdxTU(compID); const TComRectangle &rRect=rTu.getRect(compID); const UInt uiWidth=rRect.width; const UInt uiHeight=rRect.height; TCoeff* pcCoef=(pcCU->getCoeff(compID)+rTu.getCoefficientOffset(compID)); DTRACE_CABAC_VL( g_nSymbolCounter++ ) DTRACE_CABAC_T( "\tparseCoeffNxN()\teType=" ) DTRACE_CABAC_V( compID ) DTRACE_CABAC_T( "\twidth=" ) DTRACE_CABAC_V( uiWidth ) DTRACE_CABAC_T( "\theight=" ) DTRACE_CABAC_V( uiHeight ) DTRACE_CABAC_T( "\tdepth=" ) // DTRACE_CABAC_V( rTu.GetTransformDepthTotalAdj(compID) ) DTRACE_CABAC_V( rTu.GetTransformDepthTotal() ) DTRACE_CABAC_T( "\tabspartidx=" ) // DTRACE_CABAC_V( uiAbsPartIdx ) DTRACE_CABAC_V( rTu.GetAbsPartIdxTU(compID) ) DTRACE_CABAC_T( "\ttoCU-X=" ) DTRACE_CABAC_V( pcCU->getCUPelX() ) DTRACE_CABAC_T( "\ttoCU-Y=" ) DTRACE_CABAC_V( pcCU->getCUPelY() ) DTRACE_CABAC_T( "\tCU-addr=" ) DTRACE_CABAC_V( pcCU->getCtuRsAddr() ) DTRACE_CABAC_T( "\tinCU-X=" ) // DTRACE_CABAC_V( g_auiRasterToPelX[ g_auiZscanToRaster[uiAbsPartIdx] ] ) DTRACE_CABAC_V( g_auiRasterToPelX[ g_auiZscanToRaster[rTu.GetAbsPartIdxTU(compID)] ] ) DTRACE_CABAC_T( "\tinCU-Y=" ) // DTRACE_CABAC_V( g_auiRasterToPelY[ g_auiZscanToRaster[uiAbsPartIdx] ] ) DTRACE_CABAC_V( g_auiRasterToPelY[ g_auiZscanToRaster[rTu.GetAbsPartIdxTU(compID)] ] ) DTRACE_CABAC_T( "\tpredmode=" ) DTRACE_CABAC_V( pcCU->getPredictionMode( uiAbsPartIdx ) ) DTRACE_CABAC_T( "\n" ) //-------------------------------------------------------------------------------------------------- if( uiWidth > pcCU->getSlice()->getSPS()->getMaxTrSize() ) { std::cerr << "ERROR: parseCoeffNxN was passed a TU with dimensions larger than the maximum allowed size" << std::endl; assert(false); exit(1); } //-------------------------------------------------------------------------------------------------- //set parameters const ChannelType chType = toChannelType(compID); const UInt uiLog2BlockWidth = g_aucConvertToBit[ uiWidth ] + 2; const UInt uiLog2BlockHeight = g_aucConvertToBit[ uiHeight ] + 2; const UInt uiMaxNumCoeff = uiWidth * uiHeight; const UInt uiMaxNumCoeffM1 = uiMaxNumCoeff - 1; const ChannelType channelType = toChannelType(compID); const Bool extendedPrecision = pcCU->getSlice()->getSPS()->getUseExtendedPrecision(); const Bool alignCABACBeforeBypass = pcCU->getSlice()->getSPS()->getAlignCABACBeforeBypass(); #if RExt__DECODER_DEBUG_BIT_STATISTICS TComCodingStatisticsClassType ctype_group(STATS__CABAC_BITS__SIG_COEFF_GROUP_FLAG, uiLog2BlockWidth, compID); TComCodingStatisticsClassType ctype_map(STATS__CABAC_BITS__SIG_COEFF_MAP_FLAG, uiLog2BlockWidth, compID); TComCodingStatisticsClassType ctype_gt1(STATS__CABAC_BITS__GT1_FLAG, uiLog2BlockWidth, compID); TComCodingStatisticsClassType ctype_gt2(STATS__CABAC_BITS__GT2_FLAG, uiLog2BlockWidth, compID); #endif Bool beValid; if (pcCU->getCUTransquantBypass(uiAbsPartIdx)) { beValid = false; if((!pcCU->isIntra(uiAbsPartIdx)) && pcCU->isRDPCMEnabled(uiAbsPartIdx)) parseExplicitRdpcmMode(rTu, compID); } else { beValid = pcCU->getSlice()->getPPS()->getSignHideFlag() > 0; } UInt absSum = 0; //-------------------------------------------------------------------------------------------------- if(pcCU->getSlice()->getPPS()->getUseTransformSkip()) { parseTransformSkipFlags(rTu, compID); // This TU has coefficients and is transform skipped. Check whether is inter coded and if yes decode the explicit RDPCM mode if(pcCU->getTransformSkip(uiAbsPartIdx, compID) && (!pcCU->isIntra(uiAbsPartIdx)) && pcCU->isRDPCMEnabled(uiAbsPartIdx) ) { parseExplicitRdpcmMode(rTu, compID); if(pcCU->getExplicitRdpcmMode(compID, uiAbsPartIdx) != RDPCM_OFF) { // Sign data hiding is avoided for horizontal and vertical RDPCM modes beValid = false; } } } Int uiIntraMode = -1; const Bool bIsLuma = isLuma(compID); Int isIntra = pcCU->isIntra(uiAbsPartIdx) ? 1 : 0; if ( isIntra && pcCU->isRDPCMEnabled(uiAbsPartIdx) ) { uiIntraMode = pcCU->getIntraDir( toChannelType(compID), uiAbsPartIdx ); uiIntraMode = (uiIntraMode==DM_CHROMA_IDX && !bIsLuma) ? pcCU->getIntraDir(CHANNEL_TYPE_LUMA, getChromasCorrespondingPULumaIdx(uiAbsPartIdx, rTu.GetChromaFormat())) : uiIntraMode; uiIntraMode = ((rTu.GetChromaFormat() == CHROMA_422) && !bIsLuma) ? g_chroma422IntraAngleMappingTable[uiIntraMode] : uiIntraMode; Bool transformSkip = pcCU->getTransformSkip( uiAbsPartIdx,compID); Bool rdpcm_lossy = ( transformSkip /*&& isIntra*/ && ( (uiIntraMode == HOR_IDX) || (uiIntraMode == VER_IDX) ) ); if ( rdpcm_lossy ) { beValid = false; } } //-------------------------------------------------------------------------------------------------- const Bool bUseGolombRiceParameterAdaptation = pcCU->getSlice()->getSPS()->getUseGolombRiceParameterAdaptation(); UInt ¤tGolombRiceStatistic = m_golombRiceAdaptationStatistics[rTu.getGolombRiceStatisticsIndex(compID)]; //select scans TUEntropyCodingParameters codingParameters; getTUEntropyCodingParameters(codingParameters, rTu, compID); //===== decode last significant ===== UInt uiPosLastX, uiPosLastY; parseLastSignificantXY( uiPosLastX, uiPosLastY, uiWidth, uiHeight, compID, codingParameters.scanType ); UInt uiBlkPosLast = uiPosLastX + (uiPosLastY<> MLS_CG_SIZE; UInt c1 = 1; UInt uiGoRiceParam = 0; UInt uiSigCoeffGroupFlag[ MLS_GRP_NUM ]; memset( uiSigCoeffGroupFlag, 0, sizeof(UInt) * MLS_GRP_NUM ); Int iScanPosSig = (Int) uiScanPosLast; for( Int iSubSet = iLastScanSet; iSubSet >= 0; iSubSet-- ) { Int iSubPos = iSubSet << MLS_CG_SIZE; uiGoRiceParam = currentGolombRiceStatistic / RExt__GOLOMB_RICE_INCREMENT_DIVISOR; Bool updateGolombRiceStatistics = bUseGolombRiceParameterAdaptation; //leave the statistics at 0 when not using the adaptation system Int numNonZero = 0; Int lastNZPosInCG = -1; Int firstNZPosInCG = 1 << MLS_CG_SIZE; Bool escapeDataPresentInGroup = false; Int pos[1 << MLS_CG_SIZE]; if( iScanPosSig == (Int) uiScanPosLast ) { lastNZPosInCG = iScanPosSig; firstNZPosInCG = iScanPosSig; iScanPosSig--; pos[ numNonZero ] = uiBlkPosLast; numNonZero = 1; } // decode significant_coeffgroup_flag Int iCGBlkPos = codingParameters.scanCG[ iSubSet ]; Int iCGPosY = iCGBlkPos / codingParameters.widthInGroups; Int iCGPosX = iCGBlkPos - (iCGPosY * codingParameters.widthInGroups); if( iSubSet == iLastScanSet || iSubSet == 0) { uiSigCoeffGroupFlag[ iCGBlkPos ] = 1; } else { UInt uiSigCoeffGroup; UInt uiCtxSig = TComTrQuant::getSigCoeffGroupCtxInc( uiSigCoeffGroupFlag, iCGPosX, iCGPosY, codingParameters.widthInGroups, codingParameters.heightInGroups ); m_pcTDecBinIf->decodeBin( uiSigCoeffGroup, baseCoeffGroupCtx[ uiCtxSig ] RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(ctype_group) ); uiSigCoeffGroupFlag[ iCGBlkPos ] = uiSigCoeffGroup; } // decode significant_coeff_flag const Int patternSigCtx = TComTrQuant::calcPatternSigCtx(uiSigCoeffGroupFlag, iCGPosX, iCGPosY, codingParameters.widthInGroups, codingParameters.heightInGroups); UInt uiBlkPos, uiSig, uiCtxSig; for( ; iScanPosSig >= iSubPos; iScanPosSig-- ) { uiBlkPos = codingParameters.scan[ iScanPosSig ]; uiSig = 0; if( uiSigCoeffGroupFlag[ iCGBlkPos ] ) { if( iScanPosSig > iSubPos || iSubSet == 0 || numNonZero ) { uiCtxSig = TComTrQuant::getSigCtxInc( patternSigCtx, codingParameters, iScanPosSig, uiLog2BlockWidth, uiLog2BlockHeight, chType ); m_pcTDecBinIf->decodeBin( uiSig, baseCtx[ uiCtxSig ] RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(ctype_map) ); } else { uiSig = 1; } } pcCoef[ uiBlkPos ] = uiSig; if( uiSig ) { pos[ numNonZero ] = uiBlkPos; numNonZero ++; if( lastNZPosInCG == -1 ) { lastNZPosInCG = iScanPosSig; } firstNZPosInCG = iScanPosSig; } } if( numNonZero > 0 ) { Bool signHidden = ( lastNZPosInCG - firstNZPosInCG >= SBH_THRESHOLD ); absSum = 0; const UInt uiCtxSet = getContextSetIndex(compID, iSubSet, (c1 == 0)); c1 = 1; UInt uiBin; ContextModel *baseCtxMod = m_cCUOneSCModel.get( 0, 0 ) + (NUM_ONE_FLAG_CTX_PER_SET * uiCtxSet); Int absCoeff[1 << MLS_CG_SIZE]; for ( Int i = 0; i < numNonZero; i++) absCoeff[i] = 1; Int numC1Flag = min(numNonZero, C1FLAG_NUMBER); Int firstC2FlagIdx = -1; for( Int idx = 0; idx < numC1Flag; idx++ ) { m_pcTDecBinIf->decodeBin( uiBin, baseCtxMod[c1] RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(ctype_gt1) ); if( uiBin == 1 ) { c1 = 0; if (firstC2FlagIdx == -1) { firstC2FlagIdx = idx; } else //if a greater-than-one has been encountered already this group { escapeDataPresentInGroup = true; } } else if( (c1 < 3) && (c1 > 0) ) { c1++; } absCoeff[ idx ] = uiBin + 1; } if (c1 == 0) { baseCtxMod = m_cCUAbsSCModel.get( 0, 0 ) + (NUM_ABS_FLAG_CTX_PER_SET * uiCtxSet); if ( firstC2FlagIdx != -1) { m_pcTDecBinIf->decodeBin( uiBin, baseCtxMod[0] RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(ctype_gt2) ); absCoeff[ firstC2FlagIdx ] = uiBin + 2; if (uiBin != 0) { escapeDataPresentInGroup = true; } } } escapeDataPresentInGroup = escapeDataPresentInGroup || (numNonZero > C1FLAG_NUMBER); const Bool alignGroup = escapeDataPresentInGroup && alignCABACBeforeBypass; #if RExt__DECODER_DEBUG_BIT_STATISTICS TComCodingStatisticsClassType ctype_signs((alignGroup ? STATS__CABAC_BITS__ALIGNED_SIGN_BIT : STATS__CABAC_BITS__SIGN_BIT ), uiLog2BlockWidth, compID); TComCodingStatisticsClassType ctype_escs ((alignGroup ? STATS__CABAC_BITS__ALIGNED_ESCAPE_BITS : STATS__CABAC_BITS__ESCAPE_BITS), uiLog2BlockWidth, compID); #endif if (alignGroup) { m_pcTDecBinIf->align(); } UInt coeffSigns; if ( signHidden && beValid ) { m_pcTDecBinIf->decodeBinsEP( coeffSigns, numNonZero-1 RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(ctype_signs) ); coeffSigns <<= 32 - (numNonZero-1); } else { m_pcTDecBinIf->decodeBinsEP( coeffSigns, numNonZero RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(ctype_signs) ); coeffSigns <<= 32 - numNonZero; } Int iFirstCoeff2 = 1; if (escapeDataPresentInGroup) { for( Int idx = 0; idx < numNonZero; idx++ ) { UInt baseLevel = (idx < C1FLAG_NUMBER)? (2 + iFirstCoeff2) : 1; if( absCoeff[ idx ] == baseLevel) { UInt uiLevel; xReadCoefRemainExGolomb( uiLevel, uiGoRiceParam, extendedPrecision, channelType RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(ctype_escs) ); absCoeff[ idx ] = uiLevel + baseLevel; if (absCoeff[idx] > (3 << uiGoRiceParam)) { uiGoRiceParam = bUseGolombRiceParameterAdaptation ? (uiGoRiceParam + 1) : (std::min((uiGoRiceParam + 1), 4)); } if (updateGolombRiceStatistics) { const UInt initialGolombRiceParameter = currentGolombRiceStatistic / RExt__GOLOMB_RICE_INCREMENT_DIVISOR; if (uiLevel >= (3 << initialGolombRiceParameter)) { currentGolombRiceStatistic++; } else if (((uiLevel * 2) < (1 << initialGolombRiceParameter)) && (currentGolombRiceStatistic > 0)) { currentGolombRiceStatistic--; } updateGolombRiceStatistics = false; } } if(absCoeff[ idx ] >= 2) { iFirstCoeff2 = 0; } } } for( Int idx = 0; idx < numNonZero; idx++ ) { Int blkPos = pos[ idx ]; // Signs applied later. pcCoef[ blkPos ] = absCoeff[ idx ]; absSum += absCoeff[ idx ]; if ( idx == numNonZero-1 && signHidden && beValid ) { // Infer sign of 1st element. if (absSum&0x1) pcCoef[ blkPos ] = -pcCoef[ blkPos ]; } else { Int sign = static_cast( coeffSigns ) >> 31; pcCoef[ blkPos ] = ( pcCoef[ blkPos ] ^ sign ) - sign; coeffSigns <<= 1; } } } } #if ENVIRONMENT_VARIABLE_DEBUG_AND_TEST printSBACCoeffData(uiPosLastX, uiPosLastY, uiWidth, uiHeight, compID, uiAbsPartIdx, codingParameters.scanType, pcCoef); #endif return; } Void TDecSbac::parseSaoMaxUvlc ( UInt& val, UInt maxSymbol ) { if (maxSymbol == 0) { val = 0; return; } UInt code; Int i; m_pcTDecBinIf->decodeBinEP( code RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(STATS__CABAC_BITS__SAO) ); if ( code == 0 ) { val = 0; return; } i=1; while (1) { m_pcTDecBinIf->decodeBinEP( code RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(STATS__CABAC_BITS__SAO) ); if ( code == 0 ) { break; } i++; if (i == maxSymbol) { break; } } val = i; } Void TDecSbac::parseSaoUflc (UInt uiLength, UInt& riVal) { m_pcTDecBinIf->decodeBinsEP ( riVal, uiLength RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(STATS__CABAC_BITS__SAO) ); } Void TDecSbac::parseSaoMerge (UInt& ruiVal) { UInt uiCode; m_pcTDecBinIf->decodeBin( uiCode, m_cSaoMergeSCModel.get( 0, 0, 0 ) RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(STATS__CABAC_BITS__SAO) ); ruiVal = (Int)uiCode; } Void TDecSbac::parseSaoTypeIdx (UInt& ruiVal) { UInt uiCode; m_pcTDecBinIf->decodeBin( uiCode, m_cSaoTypeIdxSCModel.get( 0, 0, 0 ) RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(STATS__CABAC_BITS__SAO) ); if (uiCode == 0) { ruiVal = 0; } else { m_pcTDecBinIf->decodeBinEP( uiCode RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(STATS__CABAC_BITS__SAO) ); if (uiCode == 0) { ruiVal = 1; } else { ruiVal = 2; } } } Void TDecSbac::parseSaoSign(UInt& val) { m_pcTDecBinIf->decodeBinEP ( val RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(STATS__CABAC_BITS__SAO) ); } Void TDecSbac::parseSAOBlkParam (SAOBlkParam& saoBlkParam #if SVC_EXTENSION , UInt* saoMaxOffsetQVal #endif , Bool* sliceEnabled , Bool leftMergeAvail , Bool aboveMergeAvail ) { UInt uiSymbol; Bool isLeftMerge = false; Bool isAboveMerge= false; if(leftMergeAvail) { parseSaoMerge(uiSymbol); //sao_merge_left_flag isLeftMerge = (uiSymbol?true:false); } if( aboveMergeAvail && !isLeftMerge) { parseSaoMerge(uiSymbol); //sao_merge_up_flag isAboveMerge = (uiSymbol?true:false); } if(isLeftMerge || isAboveMerge) //merge mode { for (UInt componentIndex = 0; componentIndex < MAX_NUM_COMPONENT; componentIndex++) { saoBlkParam[componentIndex].modeIdc = (sliceEnabled[componentIndex]) ? SAO_MODE_MERGE : SAO_MODE_OFF; saoBlkParam[componentIndex].typeIdc = (isLeftMerge)?SAO_MERGE_LEFT:SAO_MERGE_ABOVE; } } else //new or off mode { for(Int compId=COMPONENT_Y; compId < MAX_NUM_COMPONENT; compId++) { const ComponentID compIdx=ComponentID(compId); const ComponentID firstCompOfChType = getFirstComponentOfChannel(toChannelType(compIdx)); SAOOffset& ctbParam = saoBlkParam[compIdx]; if(!sliceEnabled[compIdx]) { //off ctbParam.modeIdc = SAO_MODE_OFF; continue; } //type if(compIdx == firstCompOfChType) { parseSaoTypeIdx(uiSymbol); //sao_type_idx_luma or sao_type_idx_chroma assert(uiSymbol ==0 || uiSymbol ==1 || uiSymbol ==2); if(uiSymbol ==0) //OFF { ctbParam.modeIdc = SAO_MODE_OFF; } else if(uiSymbol == 1) //BO { ctbParam.modeIdc = SAO_MODE_NEW; ctbParam.typeIdc = SAO_TYPE_START_BO; } else //2, EO { ctbParam.modeIdc = SAO_MODE_NEW; ctbParam.typeIdc = SAO_TYPE_START_EO; } } else //Cr, follow Cb SAO type { ctbParam.modeIdc = saoBlkParam[COMPONENT_Cb].modeIdc; ctbParam.typeIdc = saoBlkParam[COMPONENT_Cb].typeIdc; } if(ctbParam.modeIdc == SAO_MODE_NEW) { #if O0043_BEST_EFFORT_DECODING Int bitDepthOrig = g_bitDepthInStream[toChannelType(compIdx)]; Int forceBitDepthAdjust = bitDepthOrig - g_bitDepth[toChannelType(compIdx)]; #endif Int offset[4]; for(Int i=0; i< 4; i++) { #if SVC_EXTENSION parseSaoMaxUvlc(uiSymbol, saoMaxOffsetQVal[compIdx] ); //sao_offset_abs #else #if O0043_BEST_EFFORT_DECODING Int saoMaxOffsetQVal = (1<<(min(bitDepthOrig, MAX_SAO_TRUNCATED_BITDEPTH)-5))-1; parseSaoMaxUvlc(uiSymbol, saoMaxOffsetQVal); //sao_offset_abs #else parseSaoMaxUvlc(uiSymbol, g_saoMaxOffsetQVal[compIdx] ); //sao_offset_abs #endif #endif offset[i] = (Int)uiSymbol; } if(ctbParam.typeIdc == SAO_TYPE_START_BO) { for(Int i=0; i< 4; i++) { if(offset[i] != 0) { parseSaoSign(uiSymbol); //sao_offset_sign if(uiSymbol) { #if O0043_BEST_EFFORT_DECODING offset[i] >>= forceBitDepthAdjust; #endif offset[i] = -offset[i]; } } } parseSaoUflc(NUM_SAO_BO_CLASSES_LOG2, uiSymbol ); //sao_band_position ctbParam.typeAuxInfo = uiSymbol; for(Int i=0; i<4; i++) { ctbParam.offset[(ctbParam.typeAuxInfo+i)%MAX_NUM_SAO_CLASSES] = offset[i]; } } else //EO { ctbParam.typeAuxInfo = 0; if(firstCompOfChType == compIdx) { parseSaoUflc(NUM_SAO_EO_TYPES_LOG2, uiSymbol ); //sao_eo_class_luma or sao_eo_class_chroma ctbParam.typeIdc += uiSymbol; } else { ctbParam.typeIdc = saoBlkParam[firstCompOfChType].typeIdc; } ctbParam.offset[SAO_CLASS_EO_FULL_VALLEY] = offset[0]; ctbParam.offset[SAO_CLASS_EO_HALF_VALLEY] = offset[1]; ctbParam.offset[SAO_CLASS_EO_PLAIN ] = 0; ctbParam.offset[SAO_CLASS_EO_HALF_PEAK ] = -offset[2]; ctbParam.offset[SAO_CLASS_EO_FULL_PEAK ] = -offset[3]; } } } } } /** - Initialize our contexts from the nominated source. . \param pSrc Contexts to be copied. */ Void TDecSbac::xCopyContextsFrom( const TDecSbac* pSrc ) { memcpy(m_contextModels, pSrc->m_contextModels, m_numContextModels*sizeof(m_contextModels[0])); memcpy(m_golombRiceAdaptationStatistics, pSrc->m_golombRiceAdaptationStatistics, (sizeof(UInt) * RExt__GOLOMB_RICE_ADAPTATION_STATISTICS_SETS)); } Void TDecSbac::xCopyFrom( const TDecSbac* pSrc ) { m_pcTDecBinIf->copyState( pSrc->m_pcTDecBinIf ); xCopyContextsFrom( pSrc ); } Void TDecSbac::load ( const TDecSbac* pSrc ) { xCopyFrom(pSrc); } Void TDecSbac::loadContexts ( const TDecSbac* pSrc ) { xCopyContextsFrom(pSrc); } /** Performs CABAC decoding of the explicit RDPCM mode * \param rTu current TU data structure * \param compID component identifier */ Void TDecSbac::parseExplicitRdpcmMode( TComTU &rTu, ComponentID compID ) { TComDataCU* cu = rTu.getCU(); const UInt absPartIdx=rTu.GetAbsPartIdxTU(compID); const TComRectangle &rect = rTu.getRect(compID); const UInt tuHeight = g_aucConvertToBit[rect.height]; const UInt tuWidth = g_aucConvertToBit[rect.width]; UInt code = 0; assert(tuHeight == tuWidth); #if RExt__DECODER_DEBUG_BIT_STATISTICS const TComCodingStatisticsClassType ctype(STATS__EXPLICIT_RDPCM_BITS, g_aucConvertToBit[g_uiMaxCUWidth>>rTu.GetTransformDepthTotal()]+2); #endif m_pcTDecBinIf->decodeBin(code, m_explicitRdpcmFlagSCModel.get (0, toChannelType(compID), 0) RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(ctype)); if(code == 0) { cu->setExplicitRdpcmModePartRange( RDPCM_OFF, compID, absPartIdx, rTu.GetAbsPartIdxNumParts(compID)); } else { m_pcTDecBinIf->decodeBin(code, m_explicitRdpcmDirSCModel.get (0, toChannelType(compID), 0) RExt__DECODER_DEBUG_BIT_STATISTICS_PASS_OPT_ARG(ctype)); if(code == 0) { cu->setExplicitRdpcmModePartRange( RDPCM_HOR, compID, absPartIdx, rTu.GetAbsPartIdxNumParts(compID)); } else { cu->setExplicitRdpcmModePartRange( RDPCM_VER, compID, absPartIdx, rTu.GetAbsPartIdxNumParts(compID)); } } } //! \}