⭐ 欢迎来到虫虫下载站! | 📦 资源下载 📁 资源专辑 ℹ️ 关于我们
⭐ 虫虫下载站

📄 mv-search.c

📁 H.264标准代码(用于视频编码)
💻 C
📖 第 1 页 / 共 5 页
字号:
    d[11] = m[11] - m[10];
    d[12] = m[12] + m[13];
    d[13] = m[12] - m[13];
    d[14] = m[14] + m[15];
    d[15] = m[15] - m[14];
    
    /*===== sum up =====*/
    for (dd=diff[k=0]; k<16; dd=diff[++k])
    {
      satd += (dd < 0 ? -dd : dd);
    }
    satd >>= 1;
  }
  else
  {
    /*===== sum up =====*/
    for (k = 0; k < 16; k++)
    {
      satd += byte_abs [diff [k]];
    }
  }
  
  return satd;
}



/*!
 ***********************************************************************
 * \brief
 *    Sub pixel block motion search
 ***********************************************************************
 */
int                                               //  ==> minimum motion cost after search
SubPelBlockMotionSearch (pel_t**   orig_pic,      // <--  original pixel values for the AxB block
                         int       ref,           // <--  reference frame (0... or -1 (backward))
                         int       list,          // <--  reference picture list 
                         int       pic_pix_x,     // <--  absolute x-coordinate of regarded AxB block
                         int       pic_pix_y,     // <--  absolute y-coordinate of regarded AxB block
                         int       blocktype,     // <--  block type (1-16x16 ... 7-4x4)
                         int       pred_mv_x,     // <--  motion vector predictor (x) in sub-pel units
                         int       pred_mv_y,     // <--  motion vector predictor (y) in sub-pel units
                         int*      mv_x,          // <--> in: search center (x) / out: motion vector (x) - in pel units
                         int*      mv_y,          // <--> in: search center (y) / out: motion vector (y) - in pel units
                         int       search_pos2,   // <--  search positions for    half-pel search  (default: 9)
                         int       search_pos4,   // <--  search positions for quarter-pel search  (default: 9)
                         int       min_mcost,     // <--  minimum motion cost (cost for center or huge value)
                         double    lambda         // <--  lagrangian parameter for determining motion cost
                         )
{
  int   diff[16], *d;
  int   pos, best_pos, mcost, abort_search;
  int   y0, x0, ry0, rx0, ry;
  int   cand_mv_x, cand_mv_y;
  pel_t *orig_line;
  int   incr            = ref==-1 ? ((!img->fld_type)&&(enc_picture!=enc_frame_picture)&&(img->type==B_SLICE)) : (enc_picture==enc_frame_picture)&&(img->type==B_SLICE) ;
  pel_t **ref_pic;      
  int   lambda_factor   = LAMBDA_FACTOR (lambda);
  int   mv_shift        = 0;
  int   check_position0 = (blocktype==1 && *mv_x==0 && *mv_y==0 && input->hadamard && !input->rdopt && img->type!=B_SLICE && ref==0);
  int   blocksize_x     = input->blc_size[blocktype][0];
  int   blocksize_y     = input->blc_size[blocktype][1];
  int   pic4_pix_x      = (pic_pix_x << 2);
  int   pic4_pix_y      = (pic_pix_y << 2);
  int   max_pos_x4      = ((img->width -blocksize_x+1)<<2);
  int   max_pos_y4      = ((img->height-blocksize_y+1)<<2);
  int   min_pos2        = (input->hadamard ? 0 : 1);
  int   max_pos2        = (input->hadamard ? max(1,search_pos2) : search_pos2);
  int apply_weights = ( (input->WeightedPrediction && (img->type == P_SLICE||img->type == SP_SLICE)) ||
                          (input->WeightedBiprediction && (img->type == B_SLICE)));                    
		//(input->WeightedBiprediction && (img->type == B_SLICE || img->type == BS_IMG)));

  if (apply_weights)
    ref_pic = img->type==B_SLICE? mref_w [ref+1+incr] : mref_w [ref];
  else
    ref_pic = listX[list][ref]->imgY_ups;

  if(input->InterlaceCodingOption >= MB_CODING && mb_adaptive && img->field_mode && img->type == B_SLICE)
  {
    incr    =  ref == -1 ? (img->top_field && img->field_mode):(img->field_mode);
    if (input->WeightedPrediction || input->WeightedBiprediction)
      ref_pic =  mref_w[ref+1+incr];
    else
      ref_pic =  mref[ref+1+incr];
  }

  
  /*********************************
   *****                       *****
   *****  HALF-PEL REFINEMENT  *****
   *****                       *****
   *********************************/
  //===== convert search center to quarter-pel units =====
  *mv_x <<= 2;
  *mv_y <<= 2;
  //===== set function for getting pixel values =====
  if ((pic4_pix_x + *mv_x > 1) && (pic4_pix_x + *mv_x < max_pos_x4 - 2) &&
      (pic4_pix_y + *mv_y > 1) && (pic4_pix_y + *mv_y < max_pos_y4 - 2)   )
  {
    PelY_14 = FastPelY_14;
  }
  else
  {
    PelY_14 = UMVPelY_14;
  }
  //===== loop over search positions =====
  for (best_pos = 0, pos = min_pos2; pos < max_pos2; pos++)
  {
    cand_mv_x = *mv_x + (spiral_search_x[pos] << 1);    // quarter-pel units
    cand_mv_y = *mv_y + (spiral_search_y[pos] << 1);    // quarter-pel units

    //----- set motion vector cost -----
    mcost = MV_COST (lambda_factor, mv_shift, cand_mv_x, cand_mv_y, pred_mv_x, pred_mv_y);
    if (check_position0 && pos==0)
    {
      mcost -= WEIGHTED_COST (lambda_factor, 16);
    }

    //----- add up SATD -----
    for (y0=0, abort_search=0; y0<blocksize_y && !abort_search; y0+=4)
    {
      ry0 = ((pic_pix_y+y0)<<2) + cand_mv_y;

      for (x0=0; x0<blocksize_x; x0+=4)
      {
        rx0 = ((pic_pix_x+x0)<<2) + cand_mv_x;
        d   = diff;

        orig_line = orig_pic [y0  ];    ry=ry0;
        *d++      = orig_line[x0  ]  -  PelY_14 (ref_pic, ry, rx0   );
        *d++      = orig_line[x0+1]  -  PelY_14 (ref_pic, ry, rx0+ 4);
        *d++      = orig_line[x0+2]  -  PelY_14 (ref_pic, ry, rx0+ 8);
        *d++      = orig_line[x0+3]  -  PelY_14 (ref_pic, ry, rx0+12);

        orig_line = orig_pic [y0+1];    ry=ry0+4;
        *d++      = orig_line[x0  ]  -  PelY_14 (ref_pic, ry, rx0   );
        *d++      = orig_line[x0+1]  -  PelY_14 (ref_pic, ry, rx0+ 4);
        *d++      = orig_line[x0+2]  -  PelY_14 (ref_pic, ry, rx0+ 8);
        *d++      = orig_line[x0+3]  -  PelY_14 (ref_pic, ry, rx0+12);

        orig_line = orig_pic [y0+2];    ry=ry0+8;
        *d++      = orig_line[x0  ]  -  PelY_14 (ref_pic, ry, rx0   );
        *d++      = orig_line[x0+1]  -  PelY_14 (ref_pic, ry, rx0+ 4);
        *d++      = orig_line[x0+2]  -  PelY_14 (ref_pic, ry, rx0+ 8);
        *d++      = orig_line[x0+3]  -  PelY_14 (ref_pic, ry, rx0+12);

        orig_line = orig_pic [y0+3];    ry=ry0+12;
        *d++      = orig_line[x0  ]  -  PelY_14 (ref_pic, ry, rx0   );
        *d++      = orig_line[x0+1]  -  PelY_14 (ref_pic, ry, rx0+ 4);
        *d++      = orig_line[x0+2]  -  PelY_14 (ref_pic, ry, rx0+ 8);
        *d        = orig_line[x0+3]  -  PelY_14 (ref_pic, ry, rx0+12);

        if ((mcost += SATD (diff, input->hadamard)) > min_mcost)
        {
          abort_search = 1;
          break;
        }
      }
    }

    if (mcost < min_mcost)
    {
      min_mcost = mcost;
      best_pos  = pos;
    }
  }
  if (best_pos)
  {
    *mv_x += (spiral_search_x [best_pos] << 1);
    *mv_y += (spiral_search_y [best_pos] << 1);
  }


  /************************************
   *****                          *****
   *****  QUARTER-PEL REFINEMENT  *****
   *****                          *****
   ************************************/
  //===== set function for getting pixel values =====
  if ((pic4_pix_x + *mv_x > 1) && (pic4_pix_x + *mv_x < max_pos_x4 - 1) &&
      (pic4_pix_y + *mv_y > 1) && (pic4_pix_y + *mv_y < max_pos_y4 - 1)   )
  {
    PelY_14 = FastPelY_14;
  }
  else
  {
    PelY_14 = UMVPelY_14;
  }
  //===== loop over search positions =====
  for (best_pos = 0, pos = 1; pos < search_pos4; pos++)
  {
    cand_mv_x = *mv_x + spiral_search_x[pos];    // quarter-pel units
    cand_mv_y = *mv_y + spiral_search_y[pos];    // quarter-pel units

    //----- set motion vector cost -----
    mcost = MV_COST (lambda_factor, mv_shift, cand_mv_x, cand_mv_y, pred_mv_x, pred_mv_y);

    //----- add up SATD -----
    for (y0=0, abort_search=0; y0<blocksize_y && !abort_search; y0+=4)
    {
      ry0 = ((pic_pix_y+y0)<<2) + cand_mv_y;

      for (x0=0; x0<blocksize_x; x0+=4)
      {
        rx0 = ((pic_pix_x+x0)<<2) + cand_mv_x;
        d   = diff;

        orig_line = orig_pic [y0  ];    ry=ry0;
        *d++      = orig_line[x0  ]  -  PelY_14 (ref_pic, ry, rx0   );
        *d++      = orig_line[x0+1]  -  PelY_14 (ref_pic, ry, rx0+ 4);
        *d++      = orig_line[x0+2]  -  PelY_14 (ref_pic, ry, rx0+ 8);
        *d++      = orig_line[x0+3]  -  PelY_14 (ref_pic, ry, rx0+12);

        orig_line = orig_pic [y0+1];    ry=ry0+4;
        *d++      = orig_line[x0  ]  -  PelY_14 (ref_pic, ry, rx0   );
        *d++      = orig_line[x0+1]  -  PelY_14 (ref_pic, ry, rx0+ 4);
        *d++      = orig_line[x0+2]  -  PelY_14 (ref_pic, ry, rx0+ 8);
        *d++      = orig_line[x0+3]  -  PelY_14 (ref_pic, ry, rx0+12);

        orig_line = orig_pic [y0+2];    ry=ry0+8;
        *d++      = orig_line[x0  ]  -  PelY_14 (ref_pic, ry, rx0   );
        *d++      = orig_line[x0+1]  -  PelY_14 (ref_pic, ry, rx0+ 4);
        *d++      = orig_line[x0+2]  -  PelY_14 (ref_pic, ry, rx0+ 8);
        *d++      = orig_line[x0+3]  -  PelY_14 (ref_pic, ry, rx0+12);

        orig_line = orig_pic [y0+3];    ry=ry0+12;
        *d++      = orig_line[x0  ]  -  PelY_14 (ref_pic, ry, rx0   );
        *d++      = orig_line[x0+1]  -  PelY_14 (ref_pic, ry, rx0+ 4);
        *d++      = orig_line[x0+2]  -  PelY_14 (ref_pic, ry, rx0+ 8);
        *d        = orig_line[x0+3]  -  PelY_14 (ref_pic, ry, rx0+12);

        if ((mcost += SATD (diff, input->hadamard)) > min_mcost)
        {
          abort_search = 1;
          break;
        }
      }
    }

    if (mcost < min_mcost)
    {
      min_mcost = mcost;
      best_pos  = pos;
    }
  }
  if (best_pos)
  {
    *mv_x += spiral_search_x [best_pos];
    *mv_y += spiral_search_y [best_pos];
  }

  //===== return minimum motion cost =====
  return min_mcost;
}



/*!
 ***********************************************************************
 * \brief
 *    Block motion search
 ***********************************************************************
 */
int                                         //  ==> minimum motion cost after search
BlockMotionSearch (int       ref,           // <--  reference frame (0... or -1 (backward))
                   int       list,
                   int       pic_pix_x,     // <--  absolute x-coordinate of regarded AxB block
                   int       pic_pix_y,     // <--  absolute y-coordinate of regarded AxB block
                   int       blocktype,     // <--  block type (1-16x16 ... 7-4x4)
                   int       search_range,  // <--  1-d search range for integer-position search
                   double    lambda         // <--  lagrangian parameter for determining motion cost
                   )
{
  static pel_t   orig_val [256];
  static pel_t  *orig_pic  [16] = {orig_val,     orig_val+ 16, orig_val+ 32, orig_val+ 48,
                                   orig_val+ 64, orig_val+ 80, orig_val+ 96, orig_val+112,
                                   orig_val+128, orig_val+144, orig_val+160, orig_val+176,
                                   orig_val+192, orig_val+208, orig_val+224, orig_val+240};

  int       pred_mv_x, pred_mv_y, mv_x, mv_y, i, j;

  int       max_value = (1<<20);
  int       min_mcost = max_value;
  int       mb_x      = pic_pix_x-img->pix_x;
  int       mb_y      = pic_pix_y-img->pix_y;
  int       block_x   = (mb_x>>2);
  int       block_y   = (mb_y>>2);
  int       bsx       = input->blc_size[blocktype][0];
  int       bsy       = input->blc_size[blocktype][1];
  int       refframe  = (ref==-1 ? 0 : ref);
  int*      pred_mv;
  int**     ref_array;
  int***    mv_array;
  int*****  all_bmv   = img->all_bmv;
  int*****  all_mv    = (list ? img->all_bmv : img->all_mv);
  byte**    imgY_org_pic = imgY_org;

  ref_array = enc_picture->ref_idx[list];
  mv_array  = enc_picture->mv[list];


  if(input->InterlaceCodingOption >= MB_CODING && mb_adaptive && img->field_mode)
  {
    mb_y    = pic_pix_y - img->field_pix_y;
    block_y = mb_y >> 2;
    if(img->top_field)
    {
      //pred_mv   = ((img->type!=B_SLICE && img->type!=BS_IMG) ? img->mv_top  : ref>=0 ? img->p_fwMV_top : img->p_bwMV_top)[mb_x>>2][mb_y>>2][refframe][blocktype];
      //ref_array = ((img->type!=B_SLICE && img->type!=BS_IMG) ? refFrArr_top : ref>=0 ? fw_refFrArr_top : bw_refFrArr_top);
      //mv_array  = ((img->type!=B_SLICE && img->type!=BS_IMG) ? tmp_mv_top   : ref>=0 ? tmp_fwMV_top    : tmp_bwMV_top);
			pred_mv   = ((img->type!=B_SLICE) ? img->mv_top  : ref>=0 ? img->p_fwMV_top : img->p_bwMV_top)[mb_x>>2][mb_y>>2][refframe][blocktype];
      ref_array = ((img->type!=B_SLICE) ? refFrArr_top : ref>=0 ? fw_refFrArr_top : bw_refFrArr_top);
      mv_array  = ((img->type!=B_SLICE) ? tmp_mv_top   : ref>=0 ? tmp_fwMV_top    : tmp_bwMV_top);
      all_bmv   = img->all_bmv_top;
      all_mv    = (ref==-1 ? img->all_bmv_top    : img->all_mv_top);
      imgY_org_pic = imgY_org_top;
    }
    else
    {
      //pred_mv   = ((img->type!=B_SLICE && img->type!=BS_IMG) ? img->mv_bot   : ref>=0 ? img->p_fwMV_bot : img->p_bwMV_bot)[mb_x>>2][mb_y>>2][refframe][blocktype];
      //ref_array = ((img->type!=B_SLICE && img->type!=BS_IMG) ? refFrArr_bot  : ref>=0 ? fw_refFrArr_bot : bw_refFrArr_bot);
      //mv_array  = ((img->type!=B_SLICE && img->type!=BS_IMG) ? tmp_mv_bot    : ref>=0 ? tmp_fwMV_bot    : tmp_bwMV_bot);
			pred_mv   = ((img->type!=B_SLICE) ? img->mv_bot   : ref>=0 ? img->p_fwMV_bot : img->p_bwMV_bot)[mb_x>>2][mb_y>>2][refframe][blocktype];
      ref_array = ((img->type!=B_SLICE) ? refFrArr_bot  : ref>=0 ? fw_refFrArr_bot : bw_refFrArr_bot);
      mv_array  = ((img->type!=B_SLICE) ? tmp_mv_bot    : ref>=0 ? tmp_fwMV_bot    : tmp_bwMV_bot);

      all_bmv   = img->all_bmv_bot;
      all_mv    = (ref==-1      ? img->all_bmv_bot  : img->all_mv_bot);
      imgY_org_pic = imgY_org_bot;
    }
  }
  else
    pred_mv = (img->type!=B_SLICE  ? img->mv  : list==0 ? img->p_fwMV : img->p_bwMV)[mb_x>>2][mb_y>>2][ref][blocktype];



  //==================================
  //=====   GET ORIGINAL BLOCK   =====
  //==================================
  for (j = 0; j < bsy; j++)
  {
    for (i = 0; i < bsx; i++)
    {
      orig_pic[j][i] = imgY_org_pic[pic_pix_y+j][pic_pix_x+i];
    }
  }


  //===========================================
  //=====   GET MOTION VECTOR PREDICTOR   =====
  //===========================================
  SetMotionVectorPredictor (pred_mv, enc_picture->ref_idx, enc_picture->mv, ref, list, block_x, block_y, bsx, bsy);
  pred_mv_x = pred_mv[0];
  pred_mv_y = pred_mv[1];


  //==================================
  //=====   INTEGER-PEL SEARCH   =====

⌨️ 快捷键说明

复制代码 Ctrl + C
搜索代码 Ctrl + F
全屏模式 F11
切换主题 Ctrl + Shift + D
显示快捷键 ?
增大字号 Ctrl + =
减小字号 Ctrl + -