81 lines
3.3 KiB
C++
81 lines
3.3 KiB
C++
/*!
|
|
* \copy
|
|
* Copyright (c) 2004-2013, 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.
|
|
*
|
|
*/
|
|
|
|
//bit_stream.h - bit-stream reading and / writing auxiliary data
|
|
#ifndef WELS_BIT_STREAM_H__
|
|
#define WELS_BIT_STREAM_H__
|
|
|
|
#include "typedefs.h"
|
|
namespace WelsDec {
|
|
|
|
/*
|
|
* Bit-stream auxiliary reading / writing
|
|
*/
|
|
typedef struct TagBitStringAux {
|
|
uint8_t* pStartBuf; // buffer to start position
|
|
uint8_t* pEndBuf; // buffer + length
|
|
int32_t iBits; // count bits of overall bitstreaming input
|
|
|
|
intX_t iIndex; //only for cavlc usage
|
|
uint8_t* pCurBuf; // current reading position
|
|
uint32_t uiCurBits;
|
|
int32_t iLeftBits; // count number of available bits left ([1, 8]),
|
|
// need pointer to next byte start position in case 0 bit left then 8 instead
|
|
} SBitStringAux, *PBitStringAux;
|
|
|
|
/*!
|
|
* \brief input bits for decoder or initialize bitstream writing in encoder
|
|
*
|
|
* \param pBitString Bit string auxiliary pointer
|
|
* \param kpBuf bit-stream buffer
|
|
* \param kiSize size in bits for decoder; size in bytes for encoder
|
|
*
|
|
* \return size of buffer data in byte; failed in -1 return
|
|
*/
|
|
int32_t InitBits (PBitStringAux pBitString, const uint8_t* kpBuf, const int32_t kiSize);
|
|
|
|
int32_t InitReadBits (PBitStringAux pBitString, intX_t iEndOffset);
|
|
|
|
//The following for writing bs in decoder for Parse Only purpose
|
|
void DecInitBitsForEncoding (PBitStringAux pBitString, uint8_t* kpBuf, const int32_t kiSize);
|
|
int32_t DecBsWriteBits (PBitStringAux pBitString, int32_t iLen, const uint32_t kuiValue);
|
|
int32_t DecBsWriteOneBit (PBitStringAux pBitString, const uint32_t kuiValue);
|
|
int32_t DecBsFlush (PBitStringAux pBitString);
|
|
int32_t DecBsWriteUe (PBitStringAux pBitString, const uint32_t kuiValue);
|
|
int32_t DecBsWriteSe (PBitStringAux pBitString, const int32_t kiValue);
|
|
int32_t DecBsRbspTrailingBits (PBitStringAux pBitString);
|
|
void RBSP2EBSP (uint8_t* pDstBuf, uint8_t* pSrcBuf, const int32_t kiSize);
|
|
|
|
} // namespace WelsDec
|
|
|
|
#endif//WELS_BIT_STREAM_H__
|