mirror of https://github.com/NekoX-Dev/NekoX.git
200 lines
8.0 KiB
C++
200 lines
8.0 KiB
C++
/*!
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* \copy
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* Copyright (c) 2009-2013, Cisco Systems
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* \file au_parser.h
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*
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* \brief Interfaces introduced in Access Unit level based parser
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*
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* \date 03/10/2009 Created
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*
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*************************************************************************************
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*/
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#ifndef WELS_ACCESS_UNIT_PARSER_H__
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#define WELS_ACCESS_UNIT_PARSER_H__
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#include "typedefs.h"
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#include "wels_common_basis.h"
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#include "nal_prefix.h"
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#include "dec_frame.h"
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#include "bit_stream.h"
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#include "parameter_sets.h"
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#include "decoder_context.h"
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namespace WelsDec {
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/*!
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*************************************************************************************
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* \brief Start Code Prefix (0x 00 00 00 01) detection
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*
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* \param pBuf bitstream payload buffer
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* \param pOffset offset between NAL rbsp and original bitsteam that
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* start code prefix is seperated from.
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* \param iBufSize count size of buffer
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*
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* \return RBSP buffer of start code prefix exclusive
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*
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* \note N/A
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*************************************************************************************
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*/
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uint8_t* DetectStartCodePrefix (const uint8_t* kpBuf, int32_t* pOffset, int32_t iBufSize);
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/*!
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*************************************************************************************
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* \brief to parse network abstraction layer unit,
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* escape emulation_prevention_three_byte within it
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former name is parse_nal
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*
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* \param pCtx decoder context
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* \param pNalUnitHeader parsed result of NAL Unit Header to output
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* \param pSrcRbsp bitstream buffer to input
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* \param iSrcRbspLen length size of bitstream buffer payload
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* \param pSrcNal
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* \param iSrcNalLen
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* \param pConsumedBytes consumed bytes during parsing
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*
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* \return decoded bytes payload, might be (pSrcRbsp+1) if no escapes
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*
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* \note N/A
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*************************************************************************************
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*/
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uint8_t* ParseNalHeader (PWelsDecoderContext pCtx, SNalUnitHeader* pNalUnitHeader, uint8_t* pSrcRbsp,
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int32_t iSrcRbspLen, uint8_t* pSrcNal, int32_t iSrcNalLen, int32_t* pConsumedBytes);
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int32_t ParseNonVclNal (PWelsDecoderContext pCtx, uint8_t* pRbsp, const int32_t kiSrcLen, uint8_t* pSrcNal,
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const int32_t kSrcNalLen);
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int32_t ParseRefBasePicMarking (PBitStringAux pBs, PRefBasePicMarking pRefBasePicMarking);
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int32_t ParsePrefixNalUnit (PWelsDecoderContext pCtx, PBitStringAux pBs);
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bool CheckAccessUnitBoundary (PWelsDecoderContext pCtx, const PNalUnit kpCurNal, const PNalUnit kpLastNal,
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const PSps kpSps);
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bool CheckAccessUnitBoundaryExt (PNalUnitHeaderExt pLastNalHdrExt, PNalUnitHeaderExt pCurNalHeaderExt,
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PSliceHeader pLastSliceHeader, PSliceHeader pCurSliceHeader);
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bool CheckNextAuNewSeq (PWelsDecoderContext pCtx, const PNalUnit kpCurNal, const PSps kpSps);
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/*!
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*************************************************************************************
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* \brief to parse Sequence Parameter Set (SPS)
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*
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* \param pCtx Decoder context
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* \param pBsAux bitstream reader auxiliary
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* \param pPicWidth picture width current Sps represented
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* \param pPicHeight picture height current Sps represented
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*
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* \return 0 - successed
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* 1 - failed
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*
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* \note Call it in case eNalUnitType is SPS.
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*************************************************************************************
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*/
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int32_t ParseSps (PWelsDecoderContext pCtx, PBitStringAux pBsAux, int32_t* pPicWidth, int32_t* pPicHeight,
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uint8_t* pSrcNal, const int32_t kSrcNalLen);
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/*!
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*************************************************************************************
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* \brief to parse Picture Parameter Set (PPS)
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*
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* \param pCtx Decoder context
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* \param pPpsList pps list
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* \param pBsAux bitstream reader auxiliary
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*
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* \return 0 - successed
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* 1 - failed
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*
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* \note Call it in case eNalUnitType is PPS.
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*************************************************************************************
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*/
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int32_t ParsePps (PWelsDecoderContext pCtx, PPps pPpsList, PBitStringAux pBsAux, uint8_t* pSrcNal,
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const int32_t kSrcNalLen);
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/*!
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*************************************************************************************
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* \brief to parse Video Usability Information (VUI) parameter of the SPS
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*
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* \param pCtx Decoder context
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* \param pSps the sps which current Vui parameter belongs to
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* \param pBsAux bitstream reader auxiliary
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*
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* \return 0 - successed
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* 1 - failed
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*
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* \note Call it in case the flag "vui_parameters_present_flag" in sps is true.
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*************************************************************************************
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*/
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int32_t ParseVui (PWelsDecoderContext pCtx, PSps pSps, PBitStringAux pBsAux);
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/*!
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*************************************************************************************
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* \brief to parse scaling list message payload
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*
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* \param PPS SPS scaling list matrix message to be parsed output
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* \param pBsAux bitstream reader auxiliary
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*
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* \return 0 - successed
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* 1 - failed
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*
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* \note Call it in case scaling matrix present at sps or pps
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*************************************************************************************
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*/
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int32_t SetScalingListValue (uint8_t* pScalingList, int iScalingListNum, bool* bUseDefaultScalingMatrixFlag,
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PBitStringAux pBsAux);
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int32_t ParseScalingList (PSps pSps, PBitStringAux pBs, bool bPPS, const bool kbTrans8x8ModeFlag,
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bool* bScalingListPresentFlag, uint8_t (*iScalingList4x4)[16], uint8_t (*iScalingList8x8)[64]);
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/*!
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*************************************************************************************
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* \brief to parse SEI message payload
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*
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* \param pSei sei message to be parsed output
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* \param pBsAux bitstream reader auxiliary
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*
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* \return 0 - successed
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* 1 - failed
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*
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* \note Call it in case eNalUnitType is NAL_UNIT_SEI.
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*************************************************************************************
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*/
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int32_t ParseSei (void* pSei, PBitStringAux pBsAux); // reserved Sei_Msg type
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/*!
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*************************************************************************************
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* \brief reset fmo list due to got Sps now
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*
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* \param pCtx decoder context
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*
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* \return count number of fmo context units are reset
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*************************************************************************************
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*/
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int32_t ResetFmoList (PWelsDecoderContext pCtx);
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} // namespace WelsDec
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#endif//WELS_ACCESS_UNIT_PARSER_H__
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