ref: bc3c63c4319949a9da0257d4a195de43987a5db5
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 );
void_t ParseRefBasePicMarking ( PBitStringAux pBs, PRefBasePicMarking pRefBasePicMarking );
void_t ParsePrefixNalUnit ( PWelsDecoderContext pCtx, PBitStringAux pBs );
bool_t CheckAccessUnitBoundary( const PNalUnit kpCurNal, const PNalUnit kpLastNal, const PSps kpSps );
bool_t CheckAccessUnitBoundaryExt( PNalUnitHeaderExt pLastNalHdrExt, PNalUnitHeaderExt pCurNalHeaderExt, PSliceHeader pLastSliceHeader, PSliceHeader pCurSliceHeader );
/*!
*************************************************************************************
* \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 );
/*!
*************************************************************************************
* \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 );
/*!
*************************************************************************************
* \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_t *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__