umc_mpeg2_dec_blk.cpp

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.
//
*/
#include <ippi.h>
#include <ippvc.h>
#include "ippvc_bs.h"

#define _DEF_BLOCK \
  Ipp16s *pDstBlock = pQuantSpec->dq;

#define DEF_BLOCK \
  Ipp16s pDstBlock[64];

#define MP2_FUNC(type, name, arg)  type name arg

static Ipp16s Qmatrix[64] =
{
    16,16,16,16,16,16,16,16, // It
    16,16,16,16,16,16,16,16, // Is
    16,16,16,16,16,16,16,16, // The
    16,16,16,16,16,16,16,16, // Default
    16,16,16,16,16,16,16,16, // Non
    16,16,16,16,16,16,16,16, // Intra
    16,16,16,16,16,16,16,16, // Quantizer
    16,16,16,16,16,16,16,16, // Matrix
};

#define UHBITS(code, nbits) (((Ipp32u)(code)) >> (32 - (nbits)))
#define SHBITS(code, nbits) (((Ipp32s)(code)) >> (32 - (nbits)))

#define TAB1_OFFSET_10BIT 248
#define TAB1_OFFSET_15BIT 360
#define TAB1_OFFSET_16BIT 408
#define TAB1_OFFSET_8BIT_INTRA 432
#define TAB1_OFFSET_10BIT_INTRA 680

static const Ipp16u MPEG2_VLC_TAB1[] =
{
  0xae2, 0xae2,
  0x6e9, 0x6e9,
  0x12e0, 0x12e0,
  0x6e8, 0x6e8,
  0x6c7, 0x6c7, 0x6c7, 0x6c7,
  0x6c6, 0x6c6, 0x6c6, 0x6c6,
  0xac1, 0xac1, 0xac1, 0xac1,
  0x6c5, 0x6c5, 0x6c5, 0x6c5,
  0x70d,
  0x1b00,
  0x70c,
  0x70b,
  0xb03,
  0xf01,
  0x1700,
  0x70a,
  0xea0, 0xea0, 0xea0, 0xea0, 0xea0, 0xea0, 0xea0, 0xea0, // 0010 10xx
  0x6a4, 0x6a4, 0x6a4, 0x6a4, 0x6a4, 0x6a4, 0x6a4, 0x6a4, // 0011 00xx
  0x6a3, 0x6a3, 0x6a3, 0x6a3, 0x6a3, 0x6a3, 0x6a3, 0x6a3, // 0011 10xx
  0xa80, 0xa80, 0xa80, 0xa80, 0xa80, 0xa80, 0xa80, 0xa80,
  0xa80, 0xa80, 0xa80, 0xa80, 0xa80, 0xa80, 0xa80, 0xa80, // 0100 0xxx
  0x682, 0x682, 0x682, 0x682, 0x682, 0x682, 0x682, 0x682,
  0x682, 0x682, 0x682, 0x682, 0x682, 0x682, 0x682, 0x682, // 0101 0xxx
  0x661, 0x661, 0x661, 0x661, 0x661, 0x661, 0x661, 0x661,
  0x661, 0x661, 0x661, 0x661, 0x661, 0x661, 0x661, 0x661,
  0x661, 0x661, 0x661, 0x661, 0x661, 0x661, 0x661, 0x661,
  0x661, 0x661, 0x661, 0x661, 0x661, 0x661, 0x661, 0x661, // 0110 xxxx
  0x640, 0x640, 0x640, 0x640, 0x640, 0x640, 0x640, 0x640,
  0x640, 0x640, 0x640, 0x640, 0x640, 0x640, 0x640, 0x640,
  0x640, 0x640, 0x640, 0x640, 0x640, 0x640, 0x640, 0x640,
  0x640, 0x640, 0x640, 0x640, 0x640, 0x640, 0x640, 0x640,
  0x640, 0x640, 0x640, 0x640, 0x640, 0x640, 0x640, 0x640,
  0x640, 0x640, 0x640, 0x640, 0x640, 0x640, 0x640, 0x640,
  0x640, 0x640, 0x640, 0x640, 0x640, 0x640, 0x640, 0x640,
  0x640, 0x640, 0x640, 0x640, 0x640, 0x640, 0x640, 0x640,
  0x640, 0x640, 0x640, 0x640, 0x640, 0x640, 0x640, 0x640,
  0x640, 0x640, 0x640, 0x640, 0x640, 0x640, 0x640, 0x640,
  0x640, 0x640, 0x640, 0x640, 0x640, 0x640, 0x640, 0x640,
  0x640, 0x640, 0x640, 0x640, 0x640, 0x640, 0x640, 0x640,
  0x640, 0x640, 0x640, 0x640, 0x640, 0x640, 0x640, 0x640,
  0x640, 0x640, 0x640, 0x640, 0x640, 0x640, 0x640, 0x640,
  0x640, 0x640, 0x640, 0x640, 0x640, 0x640, 0x640, 0x640,
  0x640, 0x640, 0x640, 0x640, 0x640, 0x640, 0x640, 0x640,
  0x640, 0x640, 0x640, 0x640, 0x640, 0x640, 0x640, 0x640,
  0x640, 0x640, 0x640, 0x640, 0x640, 0x640, 0x640, 0x640, // 264

  /* 13-bit code */
  0xbaa, 0xba9, 0xfa5, 0x13a3,
  0x17a2, 0x1fa1, 0x1ba1, 0x3fa0,
  0x3ba0, 0x37a0, 0x33a0, 0x7ba,
  0x7b9, 0x7b8, 0x7b7, 0x7b6,
  0x2f80, 0x2f80, 0xb88, 0xb88,
  0xf84, 0xf84, 0x2b80, 0x2b80,
  0x1382, 0x1382, 0xb87, 0xb87,
  0x795, 0x795, 0x794, 0x794,
  0x2780, 0x2780, 0x793, 0x793,
  0x792, 0x792, 0x1781, 0x1781,
  0xf83, 0xf83, 0x2380, 0x2380,
  0xb86, 0xb86, 0x791, 0x791, // 312

  /* 10-bit code  */
  0x750, 0x750, 0x750, 0x750, 0x750, 0x750, 0x750, 0x750,
  0xb45, 0xb45, 0xb45, 0xb45, 0xb45, 0xb45, 0xb45, 0xb45,
  0x1f40, 0x1f40, 0x1f40, 0x1f40, 0x1f40, 0x1f40, 0x1f40, 0x1f40,
  0xf42, 0xf42, 0xf42, 0xf42, 0xf42, 0xf42, 0xf42, 0xf42,
  0x1341, 0x1341, 0x1341, 0x1341, 0x1341, 0x1341, 0x1341, 0x1341,
  0x74f, 0x74f, 0x74f, 0x74f, 0x74f, 0x74f, 0x74f, 0x74f,
  0x74e, 0x74e, 0x74e, 0x74e, 0x74e, 0x74e, 0x74e, 0x74e,
  0xb44, 0xb44, 0xb44, 0xb44, 0xb44, 0xb44, 0xb44, 0xb44, // 376

  /* 15-bit code */
  0xa3e0, 0x9fe0, 0x9be0, 0x97e0,
  0x93e0, 0x8fe0, 0x8be0, 0x87e0,
  0x83e0, 0x3be1, 0x37e1, 0x33e1,
  0x2fe1, 0x2be1, 0x27e1, 0x23e1,
  0x7fc0, 0x7fc0, 0x7bc0, 0x7bc0,
  0x77c0, 0x77c0, 0x73c0, 0x73c0,
  0x6fc0, 0x6fc0, 0x6bc0, 0x6bc0,
  0x67c0, 0x67c0, 0x63c0, 0x63c0,
  0x5fc0, 0x5fc0, 0x5bc0, 0x5bc0,
  0x57c0, 0x57c0, 0x53c0, 0x53c0,
  0x4fc0, 0x4fc0, 0x4bc0, 0x4bc0,
  0x47c0, 0x47c0, 0x43c0, 0x43c0, // 424
  /* 16-bit code */
  0x4a01, 0x4601, 0x4201, 0x3e01,
  0xe06, 0xa10, 0xa0f, 0xa0e,
  0xa0d, 0xa0c, 0xa0b, 0x61f,
  0x61e, 0x61d, 0x61c, 0x61b, // 440

  /* 8-bit code for B15 */
  0x6e7, 0x6e7, 0x6e8, 0x6e8,
  0x6e6, 0x6e6, 0xae2, 0xae2,
  0x1ec0, 0x1ec0, 0x1ec0, 0x1ec0,
  0x1ac0, 0x1ac0, 0x1ac0, 0x1ac0,
  0x6c4, 0x6c4, 0x6c4, 0x6c4,
  0x6c5, 0x6c5, 0x6c5, 0x6c5,
  0x1701, 0x70b, 0x2f00, 0x2b00,
  0x70d, 0x70c, 0xb03, 0x1301,
  0x6a2, 0x6a2, 0x6a2, 0x6a2,
  0x6a2, 0x6a2, 0x6a2, 0x6a2,
  0xaa1, 0xaa1, 0xaa1, 0xaa1,
  0xaa1, 0xaa1, 0xaa1, 0xaa1,
  0x6a3, 0x6a3, 0x6a3, 0x6a3,
  0x6a3, 0x6a3, 0x6a3, 0x6a3,
  0x661, 0x661, 0x661, 0x661,
  0x661, 0x661, 0x661, 0x661,
  0x661, 0x661, 0x661, 0x661,
  0x661, 0x661, 0x661, 0x661,
  0x661, 0x661, 0x661, 0x661,
  0x661, 0x661, 0x661, 0x661,
  0x661, 0x661, 0x661, 0x661,
  0x661, 0x661, 0x661, 0x661,
  0xffff, 0xffff, 0xffff, 0xffff, // illegal
  0xffff, 0xffff, 0xffff, 0xffff, // bit combination
  0xffff, 0xffff, 0xffff, 0xffff, // proceed with
  0xffff, 0xffff, 0xffff, 0xffff, // previous branch
  0xe80, 0xe80, 0xe80, 0xe80,
  0xe80, 0xe80, 0xe80, 0xe80,
  0xe80, 0xe80, 0xe80, 0xe80,
  0xe80, 0xe80, 0xe80, 0xe80,
  0x640, 0x640, 0x640, 0x640,
  0x640, 0x640, 0x640, 0x640,
  0x640, 0x640, 0x640, 0x640,
  0x640, 0x640, 0x640, 0x640,
  0x640, 0x640, 0x640, 0x640,
  0x640, 0x640, 0x640, 0x640,
  0x640, 0x640, 0x640, 0x640,
  0x640, 0x640, 0x640, 0x640,
  0x640, 0x640, 0x640, 0x640,
  0x640, 0x640, 0x640, 0x640,
  0x640, 0x640, 0x640, 0x640,
  0x640, 0x640, 0x640, 0x640,
  0x640, 0x640, 0x640, 0x640,
  0x640, 0x640, 0x640, 0x640,
  0x640, 0x640, 0x640, 0x640,
  0x640, 0x640, 0x640, 0x640,
  0xa60, 0xa60, 0xa60, 0xa60,
  0xa60, 0xa60, 0xa60, 0xa60,
  0xa60, 0xa60, 0xa60, 0xa60,
  0xa60, 0xa60, 0xa60, 0xa60,
  0xa60, 0xa60, 0xa60, 0xa60,
  0xa60, 0xa60, 0xa60, 0xa60,
  0xa60, 0xa60, 0xa60, 0xa60,
  0xa60, 0xa60, 0xa60, 0xa60,
  0x12a0, 0x12a0, 0x12a0, 0x12a0,
  0x12a0, 0x12a0, 0x12a0, 0x12a0,
  0x16a0, 0x16a0, 0x16a0, 0x16a0,
  0x16a0, 0x16a0, 0x16a0, 0x16a0,
  0x6e9, 0x6e9, 0xee1, 0xee1,
  0x6ea, 0x6ea, 0x22e0, 0x22e0,
  0x26e0, 0x26e0, 0x3300, 0x3700,
  0xf02, 0xb04, 0x3b00, 0x3f00, // 688
  /* 10-bit code for B15 */
  0xb25, 0xb25, 0x72e, 0x72e,
  0x1342, 0x750, 0x72f, 0x72f,
};


#define UNPACK_VLC1(tab_val, run, val, len) \
{ \
  Ipp32u _tab_val = tab_val; \
  run = _tab_val & 0x1f; \
  len = (_tab_val >> 5) & 0xf; \
  val = (_tab_val >> 9); \
}

#define UNPACK_VLC2(tab_val, run, val, len) \
{ \
  Ipp32u _tab_val = tab_val; \
  run = _tab_val & 0x1f; \
  len = (_tab_val >> 5) & 0xf; \
  val = (_tab_val >> 10); \
}
const Ipp8u MPEG2_DCSIZE_TAB[128] = {
  0x21, 0x21, 0x21, 0x21, 0x21, 0x21, 0x21, 0x21,
  0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22,
  0x30, 0x30, 0x30, 0x30, 0x33, 0x33, 0x33, 0x33,
  0x34, 0x34, 0x34, 0x34, 0x45, 0x45, 0x56, 0x00,
  0x67, 0x67, 0x67, 0x67, 0x67, 0x67, 0x67, 0x67,
  0x67, 0x67, 0x67, 0x67, 0x67, 0x67, 0x67, 0x67,
  0x78, 0x78, 0x78, 0x78, 0x78, 0x78, 0x78, 0x78,
  0x89, 0x89, 0x89, 0x89, 0x9a, 0x9a, 0x9b, 0x9b,
  0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
  0x21, 0x21, 0x21, 0x21, 0x21, 0x21, 0x21, 0x21,
  0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22,
  0x33, 0x33, 0x33, 0x33, 0x44, 0x44, 0x55, 0x00,
  0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66,
  0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66,
  0x77, 0x77, 0x77, 0x77, 0x77, 0x77, 0x77, 0x77,
  0x88, 0x88, 0x88, 0x88, 0x99, 0x99, 0xaa, 0xbb
};

#ifdef __ICL
#define DECLALIGN(x) __declspec(align(x))
#else
#define DECLALIGN(x)
#endif

DECLALIGN(16)
static int scan_tbl[4][64] =
{
    {
        0,  8,  1,  2,  9,  16, 24, 17, // It
        10, 3,  4,  11, 18, 25, 32, 40, // is
        33, 26, 19, 12, 5,  6,  13, 20, // transposed
        27, 34, 41, 48, 56, 49, 42, 35, // zigzag
        28, 21, 14, 7,  15, 22, 29, 36, // reverse
        43, 50, 57, 58, 51, 44, 37, 30, // scan
        23, 31, 38, 45, 52, 59, 60, 53, // matrix
        46, 39, 47, 54, 61, 62, 55, 63  // for mpeg2
    },
    {
        0,  1,  2,  3,  8,  9,  16, 17, // It
        10, 11, 4,  5,  6,  7,  15, 14, // is
        13, 12, 19, 18, 24, 25, 32, 33, // transposed
        26, 27, 20, 21, 22, 23, 28, 29, // alternate
        30, 31, 34, 35, 40 ,41, 48, 49, // reverse
        42, 43, 36, 37, 38, 39, 44, 45, // scan
        46, 47, 50, 51, 56, 57, 58, 59, // matrix
        52, 53, 54, 55, 60, 61, 62, 63  // for mpeg2
    },
    {
        0,  1,  8,  16, 9,  2,  3,  10, // It
        17, 24, 32, 25, 18, 11, 4,  5,  // is
        12, 19, 26, 33, 40, 48, 41, 34, // not transposed
        27, 20, 13,  6,  7, 14, 21, 28, // zigzag
        35, 42, 49, 56, 57, 50, 43, 36, // reverse
        29, 22, 15, 23, 30, 37, 44, 51, // scan
        58, 59, 52, 45, 38, 31, 39, 46, // matrix
        53, 60, 61, 54, 47, 55, 62, 63  // for mpeg1
    },
    {
        0,  8,  16, 24, 1,  9,  2,  10, // It
        17, 25, 32, 40, 48, 56, 57, 49, // is
        41, 33, 26, 18,  3, 11, 4,  12, // not transposed
        19, 27, 34, 42, 50, 58, 35, 43, // zigzag
        51, 59, 20, 28, 5 , 13, 6 , 14, // reverse
        21, 29, 36, 44, 52, 60, 37, 45, // scan
        53, 61, 22, 30, 7 , 15, 23, 31, // matrix
        38, 46, 54, 62, 39, 47, 55, 63  // for mpeg1 (not used)
    }
};

Ipp8u default_intra_quantizer_matrix[64] =
{
   8, 16, 16, 19, 16, 19, 22, 22,  // It
  22, 22, 22, 22, 26, 24, 26, 27,  // Is
  27, 27, 26, 26, 26, 26, 27, 27,  // The
  27, 29, 29, 29, 34, 34, 34, 29,  // Default
  29, 29, 27, 27, 29, 29, 32, 32,  // mpeg
  34, 34, 37, 38, 37, 35, 35, 34,  // Intra
  35, 38, 38, 40, 40, 40, 48, 48,  // Quantizer
  46, 46, 56, 56, 58, 69, 69, 83   // Matrix
};

/***************************************************************/

#define DECODE_DC(val)                                    \
{                                                         \
  const Ipp8u *pTab;                                      \
  int dct_dc_size;                                        \
  SHOW_HI9BITS(BS, code);                                 \
  pTab = MPEG2_DCSIZE_TAB + (chromaFlag << 6);            \
  if (code < 0xf8000000) {                                \
    tbl = pTab[UHBITS(code, 5)];                          \
    dct_dc_size = tbl & 0xF;                              \
    len = tbl >> 4;                                       \
    if (dct_dc_size) {                                    \
      EXPAND_17BITS(BS, code);                            \
      code <<= len;                                       \
      val = UHBITS(code, dct_dc_size) - UHBITS(SHBITS(~code, 1), dct_dc_size); \
      SKIP_BITS(BS, len + dct_dc_size);                   \
    } else {                                              \
      val = 0;                                            \
      SKIP_BITS(BS, len);                                 \
    }                                                     \
  } else {                                                \
    tbl = pTab[32 + (UHBITS(code, 10) & 0x1f)];           \
    dct_dc_size = tbl & 0xF;                              \
    len = tbl >> 4;                                       \
    EXPAND_17BITS(BS, code);                              \
    EXPAND_25BITS(BS, code);                              \
    code <<= len;                                         \
    val = UHBITS(code, dct_dc_size) - UHBITS(SHBITS(~code, 1), dct_dc_size); \
    SKIP_BITS(BS, len + dct_dc_size);                     \
  }                                                       \
}

/* ///////////////////////////////////////////////////////////////////////////
//  Name:
//    ippiDecodeInter8x8IDCTAdd_MPEG2_1u8u
//
//  Purpose:
//    Performs VLC decoding of DCT coefficients for one inter 8x8 block,
//    dequantization of coefficients, inverse DCT and addition of resulted
//    8x8 block to destination.
//
//  Parameters:
//    ppBitStream      Pointer to the pointer to the current byte in
//                     the bitstream, it is updated after block decoding.
//    pBitOffset       Pointer to the bit position in the byte pointed by
//                     *ppBitStream, it is updated after block decoding.