/*! * \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    cabac_decoder.h * * \brief   Interfaces introduced for cabac decoder * * \date    10/10/2014 Created * ************************************************************************************* */#ifndef WELS_CABAC_DECODER_H__#define WELS_CABAC_DECODER_H__ #include "decoder_context.h"#include "error_code.h"#include "wels_common_defs.h"static const uint8_t g_kRenormTable256[256] = {  6, 6, 6, 6, 6, 6, 6, 6,  5, 5, 5, 5, 5, 5, 5, 5,  4, 4, 4, 4, 4, 4, 4, 4,  4, 4, 4, 4, 4, 4, 4, 4,  3, 3, 3, 3, 3, 3, 3, 3,  3, 3, 3, 3, 3, 3, 3, 3,  3, 3, 3, 3, 3, 3, 3, 3,  3, 3, 3, 3, 3, 3, 3, 3,  2, 2, 2, 2, 2, 2, 2, 2,  2, 2, 2, 2, 2, 2, 2, 2,  2, 2, 2, 2, 2, 2, 2, 2,  2, 2, 2, 2, 2, 2, 2, 2,  2, 2, 2, 2, 2, 2, 2, 2,  2, 2, 2, 2, 2, 2, 2, 2,  2, 2, 2, 2, 2, 2, 2, 2,  2, 2, 2, 2, 2, 2, 2, 2,  1, 1, 1, 1, 1, 1, 1, 1,  1, 1, 1, 1, 1, 1, 1, 1,  1, 1, 1, 1, 1, 1, 1, 1,  1, 1, 1, 1, 1, 1, 1, 1,  1, 1, 1, 1, 1, 1, 1, 1,  1, 1, 1, 1, 1, 1, 1, 1,  1, 1, 1, 1, 1, 1, 1, 1,  1, 1, 1, 1, 1, 1, 1, 1,  1, 1, 1, 1, 1, 1, 1, 1,  1, 1, 1, 1, 1, 1, 1, 1,  1, 1, 1, 1, 1, 1, 1, 1,  1, 1, 1, 1, 1, 1, 1, 1,  1, 1, 1, 1, 1, 1, 1, 1,  1, 1, 1, 1, 1, 1, 1, 1,  1, 1, 1, 1, 1, 1, 1, 1,  1, 1, 1, 1, 1, 1, 1, 1};  //1. CABAC context initializationvoid WelsCabacGlobalInit (PWelsDecoderContext pCabacCtx);void WelsCabacContextInit (PWelsDecoderContext  pCtx, uint8_t eSliceType, int32_t iCabacInitIdc, int32_t iQp); //2. decoding Engine initializationint32_t InitCabacDecEngineFromBS (PWelsCabacDecEngine pDecEngine, SBitStringAux* pBsAux);void RestoreCabacDecEngineToBS (PWelsCabacDecEngine pDecEngine, SBitStringAux* pBsAux);//3. actual decodingint32_t Read32BitsCabac (PWelsCabacDecEngine pDecEngine, uint32_t *uiValue, int32_t *iNumBitsRead);int32_t DecodeBinCabac (PWelsCabacDecEngine pDecEngine, PWelsCabacCtx pBinCtx, uint32_t *uiBit);int32_t DecodeBypassCabac (PWelsCabacDecEngine pDecEngine, uint32_t *uiBinVal);int32_t  DecodeTerminateCabac (PWelsCabacDecEngine pDecEngine, uint32_t *uiBinVal); //4. unary parsingint32_t DecodeUnaryBinCabac (PWelsCabacDecEngine pDecEngine, PWelsCabacCtx pBinCtx, int32_t iCtxOffset,                             uint32_t *uiSymVal); //5. EXGk parsingint32_t DecodeExpBypassCabac (PWelsCabacDecEngine pDecEngine, int32_t iCount, uint32_t *uiSymVal);uint32_t DecodeUEGLevelCabac (PWelsCabacDecEngine pDecEngine, PWelsCabacCtx pBinCtx, uint32_t *uiBinVal);int32_t DecodeUEGMvCabac (PWelsCabacDecEngine pDecEngine, PWelsCabacCtx pBinCtx, uint32_t iMaxC,  uint32_t *uiCode); #define WELS_CABAC_HALF    0x01FE#define WELS_CABAC_QUARTER 0x0100#define WELS_CABAC_FALSE_RETURN(iErrorInfo) \if(iErrorInfo) { \  return iErrorInfo; \}#endif