/* ----------------------------------------------------------------------------- The copyright in this software is being made available under the Clear BSD License, included below. No patent rights, trademark rights and/or other Intellectual Property Rights other than the copyrights concerning the Software are granted under this license. The Clear BSD License Copyright (c) 2018-2023, Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. & The VVdeC Authors. All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted (subject to the limitations in the disclaimer below) 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 copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED BY THIS LICENSE. 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 CABACReader.h * \brief Reader for low level syntax */ #pragma once #include "BinDecoder.h" #include "CommonLib/ContextModelling.h" #include "CommonLib/MotionInfo.h" #include "CommonLib/UnitPartitioner.h" #include "CommonLib/TrQuant.h" namespace vvdec { class CABACReader { public: CABACReader() = default; ~CABACReader() = default; public: void initCtxModels ( Slice& slice ); void initBitstream ( InputBitstream* bitstream ) { m_Bitstream = bitstream; // Add a byte to prevent readByteFlag from crossing the boundary m_Bitstream->inputZeroByte(); m_BinDecoder.init( m_Bitstream ); } const Ctx& getCtx () const { return m_BinDecoder.getCtx(); } void setCtx ( const Ctx& ctx ) { m_BinDecoder.setCtx( ctx ); } // slice segment data (clause 7.3.8.1) bool terminating_bit (); void remaining_bytes ( bool noTrailingBytesExpected ); // coding tree unit (clause 7.3.11.2) bool coding_tree_unit ( CodingStructure& cs, Slice* slice, const UnitArea& area, int (&qps)[2], unsigned ctuRsAddr ); bool dt_implicit_qt_split ( CodingStructure& cs, Partitioner& pL, CUCtx& cuCtxL, Partitioner& pC, CUCtx& cuCtxC ); // sao (clause 7.3.11.3) void sao ( CodingStructure& cs, unsigned ctuRsAddr ); void readAlf ( CodingStructure& cs, unsigned ctuRsAddr, const Partitioner& partitioner); short readAlfCtuFilterIndex ( CodingStructure& cs, unsigned ctuRsAddr ); // coding (quad)tree (clause 7.3.11.4) bool coding_tree ( CodingStructure& cs, Partitioner& pm, CUCtx& cuCtx ); PartSplit split_cu_mode ( CodingStructure& cs, Partitioner& pm ); ModeType mode_constraint ( CodingStructure& cs, Partitioner& pm, const PartSplit splitMode ); // coding unit (clause 7.3.11.5) bool coding_unit ( CodingUnit& cu, Partitioner& pm, CUCtx& cuCtx ); void cu_skip_flag ( CodingUnit& cu ); void pred_mode ( CodingUnit& cu ); void bdpcm_mode ( CodingUnit& cu, const ComponentID compID ); void cu_pred_data ( CodingUnit& cu ); void cu_bcw_flag ( CodingUnit& cu ); void extend_ref_line ( CodingUnit& cu ); void intra_luma_pred_mode ( CodingUnit& cu ); bool intra_chroma_lmc_mode ( CodingUnit& cu ); void intra_chroma_pred_mode ( CodingUnit& cu ); void cu_residual ( CodingUnit& cu, Partitioner& pm, CUCtx& cuCtx ); void rqt_root_cbf ( CodingUnit& cu ); void adaptive_color_transform ( CodingUnit& cu ); void sbt_mode ( CodingUnit& cu ); void mip_flag ( CodingUnit& cu ); void mip_pred_mode ( CodingUnit& cu ); bool end_of_ctu ( CodingUnit& cu, CUCtx& cuCtx ); // prediction unit (clause 7.3.11.7) void prediction_unit ( CodingUnit& cu ); void general_merge_flag ( CodingUnit& cu ); void merge_data ( CodingUnit& cu ); void affine_flag ( CodingUnit& cu ); void subblock_merge_flag ( CodingUnit& cu ); void merge_idx ( CodingUnit& cu ); void mmvd_merge_idx ( CodingUnit& cu ); void amvr_mode ( CodingUnit& cu ); void affine_amvr_mode ( CodingUnit& cu ); void inter_pred_idc ( CodingUnit& cu ); void ref_idx ( CodingUnit& cu, RefPicList eRefList ); void mvp_flag ( CodingUnit& cu, RefPicList eRefList ); void ciip_flag ( CodingUnit& cu ); void smvd_mode ( CodingUnit& cu ); // mvd coding (clause 7.3.11.8) void mvd_coding( Mv &rMvd ); // transform tree (clause 7.3.11.9) void transform_tree ( CodingStructure& cs, CodingUnit& cu, Partitioner& pm, CUCtx& cuCtx ); bool cbf_comp ( CodingUnit& cu, const CompArea& area, unsigned depth, const bool prevCbCbf = false, const bool useISP = false ); // transform unit (clause 7.3.11.10) void transform_unit ( TransformUnit& tu, CUCtx& cuCtx, Partitioner& pm ); void cu_qp_delta ( CodingUnit& cu, int predQP, int8_t& qp ); void cu_chroma_qp_offset ( CodingUnit& cu ); // residual coding (clause 7.3.11.11) void residual_coding ( TransformUnit& tu, ComponentID compID, CUCtx& cuCtx ); void ts_flag ( TransformUnit& tu, ComponentID compID ); void mts_idx ( CodingUnit& cu, CUCtx& cuCtx ); void residual_lfnst_mode ( CodingUnit& cu, CUCtx& cuCtx ); void isp_mode ( CodingUnit& cu ); int last_sig_coeff ( CoeffCodingContext& cctx, TransformUnit& tu, ComponentID compID ); int residual_coding_subblock ( CoeffCodingContext& cctx, TCoeffSig* coeff, const int stateTransTable, int& state, unsigned& signVal, int *&sigPos, unsigned &stateVal ); void residual_codingTS ( TransformUnit& tu, ComponentID compID ); void residual_coding_subblockTS( CoeffCodingContext& cctx, TCoeffSig* coeff, CoeffSigBuf dstcoeff, int& maxX, int& maxY ); void joint_cb_cr ( TransformUnit& tu, const int cbfMask ); private: unsigned unary_max_symbol ( unsigned ctxId0, unsigned ctxIdN, unsigned maxSymbol ); unsigned unary_max_eqprob ( unsigned maxSymbol ); unsigned exp_golomb_eqprob ( unsigned count ); unsigned get_num_bits_read () { return m_BinDecoder.getNumBitsRead(); } unsigned code_unary_fixed ( unsigned ctxId, unsigned unary_max, unsigned fixed ); void xReadTruncBinCode ( uint32_t &symbol, uint32_t maxSymbol ); private: TCoeffSig m_cffTmp [MAX_TU_SIZE_FOR_PROFILE * MAX_TU_SIZE_FOR_PROFILE]; unsigned m_signVal[256]; int m_numSig [256]; unsigned m_sub1 [256]; CtxTpl m_tplBuf [MAX_TU_SIZE_FOR_PROFILE * MAX_TU_SIZE_FOR_PROFILE]; int m_blkPos [MAX_TU_SIZE_FOR_PROFILE * MAX_TU_SIZE_FOR_PROFILE]; BinDecoder m_BinDecoder; InputBitstream* m_Bitstream = nullptr; Slice* m_slice = nullptr; Partitioner m_partL, m_partC; }; }