umc_h264_dec_internal_cabac.h

这是在PCA下的基于IPP库示例代码例子,在网上下了IPP的库之后,设置相关参数就可以编译该代码.

/*
//
//              INTEL CORPORATION PROPRIETARY INFORMATION
//  This software is supplied under the terms of a license  agreement or
//  nondisclosure agreement with Intel Corporation and may not be copied
//  or disclosed except in  accordance  with the terms of that agreement.
//        Copyright (c) 2003-2005 Intel Corporation. All Rights Reserved.
//
//
*/
#ifndef __UMC_H264_DEC_INTERNAL_CABAC_H
#define __UMC_H264_DEC_INTERNAL_CABAC_H

namespace UMC
{

// See table 9-11 of H.264 standard
enum // Syntax element type
{
    MB_SKIP_FLAG_P_SP            = 0,
    MB_SKIP_FLAG_B               = 1,
    MB_FIELD_DECODING_FLAG       = 2,
    MB_TYPE_SI                   = 3,
    MB_TYPE_I                    = 4,
    MB_TYPE_P_SP                 = 5,
    MB_TYPE_B                    = 6,
    CODED_BLOCK_PATTERN_LUMA     = 7,
    CODED_BLOCK_PATTERN_CHROMA   = 8,
    MB_QP_DELTA                  = 9,
    PREV_INTRA4X4_PRED_MODE_FLAG = 10,
    PREV_INTRA8X8_PRED_MODE_FLAG = 10,
    REM_INTRA4X4_PRED_MODE       = 11,
    REM_INTRA8X8_PRED_MODE       = 11,
    INTRA_CHROMA_PRED_MODE       = 12,
    REF_IDX_L0                   = 13,
    REF_IDX_L1                   = 14,
    MVD_L0_0                     = 15,
    MVD_L1_0                     = 16,
    MVD_L0_1                     = 17,
    MVD_L1_1                     = 18,
    SUB_MB_TYPE_P_SP             = 19,
    SUB_MB_TYPE_B                = 20,
    TRANSFORM_SIZE_8X8_FLAG      = 21,

    MAIN_SYNTAX_ELEMENT_NUMBER
};

// See table 9-30 of H.264 standard
enum // Syntax element type
{
    CODED_BLOCK_FLAG             = 0,
    SIGNIFICANT_COEFF_FLAG       = 1,
    LAST_SIGNIFICANT_COEFF_FLAG  = 2,
    COEFF_ABS_LEVEL_MINUS1       = 3,

    SYNTAX_ELEMENT_NUMBER
};

// See table 9-32 of H.264 standard
enum // Context block category
{
    BLOCK_LUMA_DC_LEVELS         = 0,
    BLOCK_LUMA_AC_LEVELS         = 1,
    BLOCK_LUMA_LEVELS            = 2,
    BLOCK_CHROMA_DC_LEVELS       = 3,
    BLOCK_CHROMA_AC_LEVELS       = 4,
    BLOCK_LUMA8x8_LEVELS         = 5,

    BLOCK_CATEGORY_NUMBER
};

// See table 9-11 of H.264 standard
const long ctxIdxOffset[MAIN_SYNTAX_ELEMENT_NUMBER] =
{
    11,
    24,
    70,
    0,
    3,
    14,
    27,
    73,
    77,
    60,
    68,
    69,
    64,
    54,
    54,
    40,
    40,
    47,
    47,
    21,
    36,
    399
};

// See table 9-24 of H.264 standard
const Ipp32u ctxIdxOffset4x4FrameCoded[SYNTAX_ELEMENT_NUMBER] =
{
    85,
    105,
    166,
    227
};
const Ipp32u ctxIdxOffset8x8FrameCoded[SYNTAX_ELEMENT_NUMBER] =
{
    85,//unused
    402,
    417,
    426
};

// See table 9-24 of H.264 standard
const Ipp32u ctxIdxOffset4x4FieldCoded[SYNTAX_ELEMENT_NUMBER] =
{
    85,
    277,
    338,
    227
};
const Ipp32u ctxIdxOffset8x8FieldCoded[SYNTAX_ELEMENT_NUMBER] =
{
    85,//unused
    436,
    451,
    426
};

// See table 9-30 of H.264 standard
const Ipp32u ctxIdxBlockCatOffset[SYNTAX_ELEMENT_NUMBER][BLOCK_CATEGORY_NUMBER] =
{
    {0, 4, 8, 12, 16},
    {0, 15, 29, 44, 47},
    {0, 15, 29, 44, 47},
    {0, 10, 20, 30, 39},
};

} // end namespace UMC

#endif //__UMC_H264_DEC_INTERNAL_CABAC_H