mode_decision.c

H264视频编解码程序

      }
    }
  }
  else if (list == BI_PRED)
  {
    bmcost[list]  = (input->rdopt 
      ? (REF_COST  (enc_mb.lambda_mf, (short)best_ref[LIST_0], cur_list)
      +  REF_COST  (enc_mb.lambda_mf, (short)best_ref[LIST_1], cur_list + LIST_1)) 
      : (int) (2 * (enc_mb.lambda_me * (min((short)best_ref[LIST_0], 1) + min((short)best_ref[LIST_1], 1)))));    
    bmcost[list] += BIDPartitionCost (mode, block, (short)best_ref[LIST_0], (short)best_ref[LIST_1], enc_mb.lambda_mf);    
  }
  else
  {
    bmcost[list]  = (input->rdopt 
      ? (REF_COST (enc_mb.lambda_mf, 0, cur_list) 
      +  REF_COST (enc_mb.lambda_mf, 0, cur_list + LIST_1)) 
      : (int) (4 * enc_mb.lambda_me));
    bmcost[list] += BPredPartitionCost(mode, block, 0, 0, enc_mb.lambda_mf, !(list&1));                
  }
}  

int compute_ref_cost(RD_PARAMS enc_mb, int ref, int list)
{  
  return WEIGHTED_COST(enc_mb.lambda_mf,((listXsize[enc_mb.list_offset[list]] <= 1)? 0:refbits[ref]));
}

/*!
*************************************************************************************
* \brief
*    Determination of prediction list based on simple distortion computation
*************************************************************************************
*/
void determine_prediction_list(int mode, int bmcost[5], char best_ref[2], short *best_pdir, int *cost, short *bi_pred_me)
{  
  if ((!input->BiPredMotionEstimation) || (mode != 1))
  {               
    //--- get prediction direction ----
    if  (bmcost[LIST_0] <= bmcost[LIST_1] 
      && bmcost[LIST_0] <= bmcost[BI_PRED])
    {
      *best_pdir = 0;
//      if(*cost!=INT_MAX)
        *cost += bmcost[LIST_0];
      //best_ref[LIST_1] = 0;
    }
    else if (bmcost[LIST_1] <= bmcost[LIST_0] 
      &&     bmcost[LIST_1] <= bmcost[BI_PRED])
    {
      *best_pdir = 1;
//      if(*cost!=INT_MAX)
        *cost += bmcost[LIST_1];
      //best_ref[LIST_0] = 0;
    }
    else
    {
      *best_pdir = 2;
//      if((bmcost[BI_PRED]==INT_MAX) | (*cost==INT_MAX))
//        *cost=INT_MAX;
//      else
        *cost += bmcost[BI_PRED];
      //best_ref[LIST_1] = 0;
    }
  }
  else
  {                            
    img->bi_pred_me[mode]=0;
    *bi_pred_me = 0;
    //--- get prediction direction ----
    if  (bmcost[LIST_0] <= bmcost[LIST_1] 
      && bmcost[LIST_0] <= bmcost[BI_PRED] 
      && bmcost[LIST_0] <= bmcost[BI_PRED_L0] 
      && bmcost[LIST_0] <= bmcost[BI_PRED_L1])
    {
      *best_pdir = 0;
      *cost += bmcost[LIST_0];
      //best_ref[LIST_1] = 0;
    }
    else if (bmcost[LIST_1] <= bmcost[LIST_0] 
      &&     bmcost[LIST_1] <= bmcost[BI_PRED] 
      &&     bmcost[LIST_1] <= bmcost[BI_PRED_L0] 
      &&     bmcost[LIST_1] <= bmcost[BI_PRED_L1])
    {
      *best_pdir = 1;
      *cost += bmcost[LIST_1];
      //best_ref[LIST_0] = 0;
    }
    else if (bmcost[BI_PRED] <= bmcost[LIST_0] 
      &&     bmcost[BI_PRED] <= bmcost[LIST_1] 
      &&     bmcost[BI_PRED] <= bmcost[BI_PRED_L0] 
      &&     bmcost[BI_PRED] <= bmcost[BI_PRED_L1])
    {
      *best_pdir = 2;
      *cost += bmcost[BI_PRED];
      //best_ref[LIST_1] = 0;  
    }
    else if (bmcost[BI_PRED_L0] <= bmcost[LIST_0] 
      &&     bmcost[BI_PRED_L0] <= bmcost[LIST_1] 
      &&     bmcost[BI_PRED_L0] <= bmcost[BI_PRED]
      &&     bmcost[BI_PRED_L0] <= bmcost[BI_PRED_L1])
    {
      *best_pdir = 2;
      *cost += bmcost[BI_PRED_L0];                  
      *bi_pred_me = 1;
      img->bi_pred_me[mode]=1;
      best_ref[LIST_1] = 0;
      best_ref[LIST_0] = 0;
    }
    else
    {
      *best_pdir = 2;
      *cost += bmcost[BI_PRED_L1];                                  
      *bi_pred_me = 2;
      best_ref[LIST_1] = 0;
      best_ref[LIST_0] = 0;
      img->bi_pred_me[mode]=2;
    }               
  }
}

/*!
*************************************************************************************
* \brief
*    RD decision process
*************************************************************************************
*/
void compute_mode_RD_cost(int mode, 
                          Macroblock *currMB, 
                          RD_PARAMS enc_mb, 
                          double *min_rdcost, 
                          double *min_rate, 
                          int i16mode, 
                          short bslice, 
                          short *inter_skip)
{
  //--- transform size ---           
  currMB->luma_transform_size_8x8_flag = input->Transform8x8Mode==2
    ?  (mode >= 1 && mode <= 3)
    || (mode == 0 && bslice && active_sps->direct_8x8_inference_flag)
    || ((mode == P8x8) && (enc_mb.valid[4]))
    :  0;
//store_coding_state (cs_cm); // RD  
  SetModesAndRefframeForBlocks (mode);
  
  // Encode with coefficients
  img->NoResidueDirect = 0;  
  if (currMB->c_ipred_mode == DC_PRED_8 || (IS_INTRA(currMB) ))
  {
    while(1)
    {
      if (RDCost_for_macroblocks (enc_mb.lambda_md, mode, min_rdcost, min_rate, i16mode))
      {
        //Rate control
        if (input->RCEnable)
        {
          if(mode == P8x8)
            rc_store_diff(img->opix_x,img->opix_y,
            currMB->luma_transform_size_8x8_flag == 1 ? tr8x8.mpr8x8 : tr4x4.mpr8x8);
          else
            rc_store_diff(img->opix_x, img->opix_y, pred);
        }      
        store_macroblock_parameters (mode);
        
        if(input->rdopt==2 && mode == 0 && input->EarlySkipEnable)
        {
          // check transform quantized coeff.
          if(currMB->cbp == 0)
            *inter_skip = 1;
        }
        
      }
      
      // Go through transform modes. 
      // Note that if currMB->cbp is 0 one could choose to skip 8x8 mode
      // although this could be due to deadzoning decisions.
      //if (input->Transform8x8Mode==1 && currMB->cbp!=0) 
      if (input->Transform8x8Mode==1)
      {
        //=========== try mb_types 1,2,3 with 8x8 transform ===========
        if ((mode >= 1 && mode <= 3) && currMB->luma_transform_size_8x8_flag == 0)
        {
          //try with 8x8 transform size
          currMB->luma_transform_size_8x8_flag = 1;
          continue;
        }
        //=========== try DIRECT-MODE with 8x8 transform ===========
        else if (mode == 0 && bslice && active_sps->direct_8x8_inference_flag && currMB->luma_transform_size_8x8_flag == 0)
        {
          //try with 8x8 transform size
          currMB->luma_transform_size_8x8_flag = 1;
          continue;
        }
        //=========== try mb_type P8x8 for mode 4 with 4x4/8x8 transform ===========
        else if ((mode == P8x8) && (enc_mb.valid[4]) && (currMB->luma_transform_size_8x8_flag == 0))
        {
          currMB->luma_transform_size_8x8_flag = 1; //check 8x8 partition for transform size 8x8
          continue;
        }
        else
        {
          currMB->luma_transform_size_8x8_flag = 0;
          break;
        }
      }
      else
        break;
    }
  
  // Encode with no coefficients. Currently only for direct. This could be extended to all other modes as in example.
  //if (mode < P8x8 && (*inter_skip == 0) && enc_mb.valid[mode] && currMB->cbp && (currMB->cbp&15) != 15 && !input->nobskip)
  if ( bslice && mode == 0 && (*inter_skip == 0) && enc_mb.valid[mode] 
    && currMB->cbp && (currMB->cbp&15) != 15 && !input->nobskip) 
  {
    img->NoResidueDirect = 1;
    if (RDCost_for_macroblocks (enc_mb.lambda_md, mode, min_rdcost, min_rate, i16mode)) 
    {
      //Rate control
      if (input->RCEnable)
        rc_store_diff(img->opix_x,img->opix_y,pred);
      
      store_macroblock_parameters (mode);
    }
  }
  }
};


/*!
*************************************************************************************
* \brief
*    Mode Decision for an 8x8 sub-macroblock
*************************************************************************************
*/
void submacroblock_mode_decision(RD_PARAMS enc_mb, 
                                 RD_8x8DATA *dataTr, 
                                 Macroblock *currMB,
                                 int ***cofACtr, 
                                 int *have_direct, 
                                 short bslice, 
                                 int block, 
                                 int *cost_direct,                                  
                                 int *cost,
                                 int *cost8x8_direct,
                                 int transform8x8)  
{
  int j0, i0, j1, i1;
  int i,j, k;
  int min_cost8x8, index;
  double min_rdcost, rdcost = 0.0;
  short best_pdir = 0;
  char best_ref[2] = {0, -1};
  int mode;
  int64 curr_cbp_blk;
  int direct4x4_tmp, direct8x8_tmp;
  int bmcost[5] = {INT_MAX};
  int cnt_nonz = 0;
  short pdir;
  int dummy;
  short bi_pred_me;
  int best_cnt_nonz = 0;
  int maxindex =  (transform8x8) ? 2 : 5;
  int pix_x, pix_y;
  int block_x, block_y;
  
  int fadjust[16][16], fadjustCr[2][16][16];    
  int (*fadjustTransform)[16][16] = transform8x8? img->fadjust8x8 : img->fadjust4x4;
  int (*fadjustTransformCr)[2][16][16] = transform8x8? img->fadjust8x8Cr : img->fadjust4x4Cr;
  int lumaAdjustIndex = transform8x8? 2 : 3;
  int chromaAdjustIndex = transform8x8? 0 : 2;
#ifdef BEST_NZ_COEFF
  int best_nz_coeff[2][2];
#endif

 
  //--- set coordinates ---
  j0 = ((block/2)<<3);    j1 = (j0>>2);
  i0 = ((block%2)<<3);    i1 = (i0>>2);

#ifdef BEST_NZ_COEFF
  for(j = 0; j <= 1; j++)
  {
    for(i = 0; i <= 1; i++)
      best_nz_coeff[i][j] = img->nz_coeff[img->current_mb_nr][i1 + i][j1 + j] = 0;
  }
#endif

  if (transform8x8)
    currMB->luma_transform_size_8x8_flag = 1; //switch to transform size 8x8
  
  //--- store coding state before coding ---
  store_coding_state (cs_cm);

  //=====  LOOP OVER POSSIBLE CODING MODES FOR 8x8 SUB-PARTITION  =====
  for (min_cost8x8=INT_MAX, min_rdcost=1e30, index=(bslice?0:1); index<maxindex; index++)
  {
    mode = b8_mode_table[index]; 
    *cost = 0;
    if (enc_mb.valid[mode] && (transform8x8 == 0 || mode != 0 || (mode == 0 && active_sps->direct_8x8_inference_flag)))
    {
      curr_cbp_blk = 0;
      
      if (mode==0)
      {
        //--- Direct Mode ---                                      
        if (!input->rdopt )
        {
          direct4x4_tmp = 0; 
          direct8x8_tmp = 0;
          direct4x4_tmp = Get_Direct_Cost8x8 ( block, &direct8x8_tmp);
          
          if ((direct4x4_tmp==INT_MAX)||(*cost_direct==INT_MAX))
          {
            *cost_direct = INT_MAX;
            if (transform8x8) 
              *cost8x8_direct = INT_MAX;
          }
          else
          {
            *cost_direct += direct4x4_tmp;
            if (transform8x8) 
              *cost8x8_direct += direct8x8_tmp;
          }                     
          *have_direct ++;
          
          if (transform8x8)
          {
            switch(input->Transform8x8Mode)
            {
            case 1: // Mixture of 8x8 & 4x4 transform
              if((direct8x8_tmp < direct4x4_tmp) || !(enc_mb.valid[5] && enc_mb.valid[6] && enc_mb.valid[7]))
                *cost = direct8x8_tmp;
              else
                *cost = direct4x4_tmp;
              break;
            case 2: // 8x8 Transform only
              *cost = direct8x8_tmp;
              break;
            default: // 4x4 Transform only
              *cost = direct4x4_tmp;
              break;
            }            
            if (input->Transform8x8Mode==2) 
              *cost = INT_MAX;                                       
          }
          else
          {
            *cost = direct4x4_tmp;
          }
        }

        block_x = img->block_x+(block&1)*2;
        block_y = img->block_y+(block&2);
        best_ref[LIST_0] = direct_ref_idx[LIST_0][block_y][block_x];
        best_ref[LIST_1] = direct_ref_idx[LIST_1][block_y][block_x];
        best_pdir   = direct_pdir[block_y][block_x];
      } // if (mode==0)
      else
      {        
        //======= motion estimation for all reference frames ========