ref: 0bae0f869a1f2aa11dc75fedac5bb36a94a87d46
dir: /codec/decoder/core/inc/au_parser.h/
/*! * \copy * Copyright (c) 2009-2013, Cisco Systems * 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. * * 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 au_parser.h * * \brief Interfaces introduced in Access Unit level based parser * * \date 03/10/2009 Created * ************************************************************************************* */ #ifndef WELS_ACCESS_UNIT_PARSER_H__ #define WELS_ACCESS_UNIT_PARSER_H__ #include "typedefs.h" #include "wels_common_basis.h" #include "nal_prefix.h" #include "dec_frame.h" #include "bit_stream.h" #include "parameter_sets.h" #include "decoder_context.h" namespace WelsDec { /*! ************************************************************************************* * \brief Start Code Prefix (0x 00 00 00 01) detection * * \param pBuf bitstream payload buffer * \param pOffset offset between NAL rbsp and original bitsteam that * start code prefix is seperated from. * \param iBufSize count size of buffer * * \return RBSP buffer of start code prefix exclusive * * \note N/A ************************************************************************************* */ uint8_t* DetectStartCodePrefix (const uint8_t* kpBuf, int32_t* pOffset, int32_t iBufSize); /*! ************************************************************************************* * \brief to parse network abstraction layer unit, * escape emulation_prevention_three_byte within it former name is parse_nal * * \param pCtx decoder context * \param pNalUnitHeader parsed result of NAL Unit Header to output * \param pSrcRbsp bitstream buffer to input * \param iSrcRbspLen length size of bitstream buffer payload * \param pSrcNal * \param iSrcNalLen * \param pConsumedBytes consumed bytes during parsing * * \return decoded bytes payload, might be (pSrcRbsp+1) if no escapes * * \note N/A ************************************************************************************* */ uint8_t* ParseNalHeader (PWelsDecoderContext pCtx, SNalUnitHeader* pNalUnitHeader, uint8_t* pSrcRbsp, int32_t iSrcRbspLen, uint8_t* pSrcNal, int32_t iSrcNalLen, int32_t* pConsumedBytes); int32_t ParseNonVclNal (PWelsDecoderContext pCtx, uint8_t* pRbsp, const int32_t kiSrcLen, uint8_t* pSrcNal, const int32_t kSrcNalLen); int32_t ParseRefBasePicMarking (PBitStringAux pBs, PRefBasePicMarking pRefBasePicMarking); int32_t ParsePrefixNalUnit (PWelsDecoderContext pCtx, PBitStringAux pBs); bool CheckAccessUnitBoundary (PWelsDecoderContext pCtx, const PNalUnit kpCurNal, const PNalUnit kpLastNal, const PSps kpSps); bool CheckAccessUnitBoundaryExt (PNalUnitHeaderExt pLastNalHdrExt, PNalUnitHeaderExt pCurNalHeaderExt, PSliceHeader pLastSliceHeader, PSliceHeader pCurSliceHeader); bool CheckNextAuNewSeq (PWelsDecoderContext pCtx, const PNalUnit kpCurNal, const PSps kpSps); /*! ************************************************************************************* * \brief to parse Sequence Parameter Set (SPS) * * \param pCtx Decoder context * \param pBsAux bitstream reader auxiliary * \param pPicWidth picture width current Sps represented * \param pPicHeight picture height current Sps represented * * \return 0 - successed * 1 - failed * * \note Call it in case eNalUnitType is SPS. ************************************************************************************* */ int32_t ParseSps (PWelsDecoderContext pCtx, PBitStringAux pBsAux, int32_t* pPicWidth, int32_t* pPicHeight, uint8_t* pSrcNal, const int32_t kSrcNalLen); /*! ************************************************************************************* * \brief to parse Picture Parameter Set (PPS) * * \param pCtx Decoder context * \param pPpsList pps list * \param pBsAux bitstream reader auxiliary * * \return 0 - successed * 1 - failed * * \note Call it in case eNalUnitType is PPS. ************************************************************************************* */ int32_t ParsePps (PWelsDecoderContext pCtx, PPps pPpsList, PBitStringAux pBsAux, uint8_t* pSrcNal, const int32_t kSrcNalLen); /*! ************************************************************************************* * \brief to parse SEI message payload * * \param pSei sei message to be parsed output * \param pBsAux bitstream reader auxiliary * * \return 0 - successed * 1 - failed * * \note Call it in case eNalUnitType is NAL_UNIT_SEI. ************************************************************************************* */ int32_t ParseSei (void* pSei, PBitStringAux pBsAux); // reserved Sei_Msg type /*! ************************************************************************************* * \brief reset fmo list due to got Sps now * * \param pCtx decoder context * * \return count number of fmo context units are reset ************************************************************************************* */ int32_t ResetFmoList (PWelsDecoderContext pCtx); } // namespace WelsDec #endif//WELS_ACCESS_UNIT_PARSER_H__