ref: cbe5acfbab50a1f6174cace440d5ad111d82aeec
dir: /codec/encoder/core/inc/nal_encap.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 nal_encap.h
*
* \brief NAL pRawNal pData encapsulation
*
* \date 2/4/2009 Created
*
*************************************************************************************
*/
#ifndef WELS_NAL_UNIT_ENCAPSULATION_H__
#define WELS_NAL_UNIT_ENCAPSULATION_H__
#include "typedefs.h"
#include "wels_common_defs.h"
#include "wels_const.h"
using namespace WelsCommon;
//SBitStringAux
namespace WelsEnc {
#define NAL_HEADER_SIZE (4)
/*
* Raw payload pData for NAL unit, AVC/SVC compatible
*/
typedef struct TagWelsNalRaw {
uint8_t* pRawData; // pRawNal payload for slice pData
int32_t iPayloadSize; // size of pRawNal pData
SNalUnitHeaderExt sNalExt; // NAL header information
int32_t iStartPos; //NAL start position in buffer
} SWelsNalRaw;
/*
* Encoder majoy output pData
*/
typedef struct TagWelsEncoderOutput {
uint8_t* pBsBuffer; // overall bitstream pBuffer allocation for a coded picture, recycling use intend.
uint32_t uiSize; // size of allocation pBuffer above
SBitStringAux sBsWrite;
// SWelsNalRaw raw_nals[MAX_DEPENDENCY_LAYER*2+MAX_DEPENDENCY_LAYER*MAX_QUALITY_LEVEL]; // AVC: max up to SPS+PPS+max_slice_idc (2 + 8) for FMO;
SWelsNalRaw* sNalList; // nal list, adaptive for AVC/SVC in case single slice, multiple slices or fmo
int32_t* pNalLen;
int32_t iCountNals; // count number of NAL in list
// SVC: num_sps (MAX_D) + num_pps (MAX_D) + num_vcl (MAX_D * MAX_Q)
int32_t iNalIndex; // coding NAL currently, 0 based
int32_t iLayerBsIndex; // layer index of bit stream for SFrameBsIfo
// bool bAnnexBFlag; // annexeb flag, to figure it pOut the packetization mode whether need 4 bytes (0 0 0 1) of start code prefix
} SWelsEncoderOutput;
//#define MT_DEBUG_BS_WR 0 // for MT debugging if needed
typedef struct TagWelsSliceBs {
uint8_t* pBs; // output bitstream, pBitStringAux not needed for slice 0 due to no dependency of pFrameBs available
uint32_t uiBsPos; // position of output bitstream
uint8_t* pBsBuffer; // overall bitstream pBuffer allocation for a coded slice, recycling use intend.
uint32_t uiSize; // size of allocation pBuffer above
SBitStringAux sBsWrite;
SWelsNalRaw sNalList[2]; // nal list, PREFIX NAL(if applicable) + SLICE NAL
// int32_t iCountNals; // count number of NAL in list
int32_t iNalLen[2];
int32_t iNalIndex; // coding NAL currently, 0 based
// bool bAnnexBFlag; // annexeb flag, to figure it pOut the packetization mode whether need 4 bytes (0 0 0 1) of start code prefix
#if MT_DEBUG_BS_WR
bool bSliceCodedFlag;
#endif//MT_DEBUG_BS_WR
} SWelsSliceBs;
/*!
* \brief load an initialize NAL pRawNal pData
*/
void WelsLoadNal (SWelsEncoderOutput* pEncoderOuput, const int32_t/*EWelsNalUnitType*/ kiType,
const int32_t/*EWelsNalRefIdc*/ kiNalRefIdc);
/*!
* \brief unload pRawNal NAL
*/
void WelsUnloadNal (SWelsEncoderOutput* pEncoderOuput);
/*!
* \brief load an initialize NAL pRawNal pData
*/
void WelsLoadNalForSlice (SWelsSliceBs* pSliceBs, const int32_t/*EWelsNalUnitType*/ kiType,
const int32_t/*EWelsNalRefIdc*/ kiNalRefIdc);
/*!
* \brief unload pRawNal NAL
*/
void WelsUnloadNalForSlice (SWelsSliceBs* pSliceBs);
/*!
* \brief encode NAL with emulation forbidden three bytes checking
* \param pDst pDst NAL pData
* \param pDstLen length of pDst NAL output
* \param annexeb annexeb flag
* \param pRawNal pRawNal NAL pData
* \return ERR_CODE
*/
int32_t WelsEncodeNal (SWelsNalRaw* pRawNal, void* pNalHeaderExt, const int32_t kiDstBufferLen, void* pDst,
int32_t* pDstLen);
/*!
* \brief write prefix nal
*/
int32_t WelsWriteSVCPrefixNal (SBitStringAux* pBitStringAux, const int32_t keNalRefIdc, const bool kbIdrFlag);
}
#endif//WELS_NAL_UNIT_ENCAPSULATION_H__