[Mp4-tech] Corresponding block predictor in Reference frame in JM12.2 ME Algorithms

[Tourapis, Alexis]

All temporal predictors in EPZS are handled in EPZSTemporalPredictors(). The one corresponding to the co-located position is the first one assigned in this function, i.e.
cur_mv[0] = rshift_rnd_sf((mvScale * col_mv[o_block_y][o_block_x][0]), temp_shift_mv);
cur_mv[1] = rshift_rnd_sf((mvScale * col_mv[o_block_y][o_block_x][1]), temp_shift_mv);
Note that all these predictors have already been processed in EPZSSliceInit somewhat similar to the process that was performed for direct modes.
Best regards,
Alexis
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From: mp4-tech-bounces lists.mpegif.org [mailto:mp4-tech-bounces lists.mpegif.org] On Behalf Of Peace
Sent: Monday, January 14, 2024 1:12 AM
To: mp4-tech lists.mpegif.org
Subject: [Mp4-tech] Corresponding block predictor in Reference frame in JM12.2 ME Algorithms
Hi,
I am looking for the predictor of the block that is located at the same p[osition in the previous frame.
IN ME-umhex.c , i have found this....
//prediction using mV of last ref moiton vector
  if(pred_MV_ref_flag == 1)      //Notes: for interlace case, ref==1 should be added
  {
    cand_x = pic_pix_x + (pred_MV_ref[0]/4);
    cand_y = pic_pix_y + (pred_MV_ref[1]/4); 
    SEARCH_ONE_PIXEL
  }
However in Me-EPZS.c , i am unable to find this one, Probably there it does not exists, as all the other temporal predictors are  present.
If yes then can anyone point out?
Thanks and Best REgards
Humaira
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