/* ----------------------------------------------------------------------------- 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 BinDecoder.h * \brief Low level binary symbol writer */ #pragma once #include "CommonLib/Contexts.h" #include "CommonLib/BitStream.h" namespace vvdec { class BinDecoder { public: BinDecoder() = default; ~BinDecoder() = default; void init ( InputBitstream* bitstream ); void uninit (); void start (); void finish (); void reset ( int qp, int initId ); const Ctx& getCtx() const { return m_Ctx; } void setCtx( const Ctx& ctx ) { m_Ctx = ctx; } unsigned decodeBin ( unsigned ctxId ); unsigned decodeBinEP (); unsigned decodeBinsEP ( unsigned numBins ); unsigned decodeRemAbsEP ( unsigned goRicePar, unsigned cutoff, int maxLog2TrDynamicRange ); unsigned decodeBinTrm (); void align (); unsigned getNumBitsRead () { return m_Bitstream->getNumBitsRead() + m_bitsNeeded; } private: unsigned decodeAlignedBinsEP ( unsigned numBins ); Ctx m_Ctx; protected: InputBitstream* m_Bitstream = nullptr; uint32_t m_Range = 0; uint32_t m_Value = 0; int32_t m_bitsNeeded = 0; }; }