Пример #1
0
MV32 vp9_scale_mv(const MV *mv, int x, int y, const struct scale_factors *sf) {
  const int x_off_q4 = scaled_x(x << SUBPEL_BITS, sf) & SUBPEL_MASK;
  const int y_off_q4 = scaled_y(y << SUBPEL_BITS, sf) & SUBPEL_MASK;
  const MV32 res = {
    scaled_y(mv->row, sf) + y_off_q4,
    scaled_x(mv->col, sf) + x_off_q4
  };
  return res;
}
Пример #2
0
static MV32 scaled_mv(const MV *mv, const struct scale_factors *scale) {
  const MV32 res = {
    scaled_y(mv->row, scale) + scale->y_offset_q4,
    scaled_x(mv->col, scale) + scale->x_offset_q4
  };
  return res;
}
Пример #3
0
void vp9_setup_scale_factors_for_frame(struct scale_factors *sf,
                                       int other_w, int other_h,
                                       int this_w, int this_h) {
  if (!check_scale_factors(other_w, other_h, this_w, this_h)) {
    sf->x_scale_fp = REF_INVALID_SCALE;
    sf->y_scale_fp = REF_INVALID_SCALE;
    return;
  }

  sf->x_scale_fp = get_fixed_point_scale_factor(other_w, this_w);
  sf->y_scale_fp = get_fixed_point_scale_factor(other_h, this_h);
  sf->x_step_q4 = scaled_x(16, sf);
  sf->y_step_q4 = scaled_y(16, sf);

  if (vp9_is_scaled(sf)) {
    sf->scale_value_x = scaled_x;
    sf->scale_value_y = scaled_y;
  } else {
    sf->scale_value_x = unscaled_value;
    sf->scale_value_y = unscaled_value;
  }

  // TODO(agrange): Investigate the best choice of functions to use here
  // for EIGHTTAP_SMOOTH. Since it is not interpolating, need to choose what
  // to do at full-pel offsets. The current selection, where the filter is
  // applied in one direction only, and not at all for 0,0, seems to give the
  // best quality, but it may be worth trying an additional mode that does
  // do the filtering on full-pel.
  if (sf->x_step_q4 == 16) {
    if (sf->y_step_q4 == 16) {
      // No scaling in either direction.
      sf->predict[0][0][0] = vp9_convolve_copy;
      sf->predict[0][0][1] = vp9_convolve_avg;
      sf->predict[0][1][0] = vp9_convolve8_vert;
      sf->predict[0][1][1] = vp9_convolve8_avg_vert;
      sf->predict[1][0][0] = vp9_convolve8_horiz;
      sf->predict[1][0][1] = vp9_convolve8_avg_horiz;
    } else {
      // No scaling in x direction. Must always scale in the y direction.
      sf->predict[0][0][0] = vp9_convolve8_vert;
      sf->predict[0][0][1] = vp9_convolve8_avg_vert;
      sf->predict[0][1][0] = vp9_convolve8_vert;
      sf->predict[0][1][1] = vp9_convolve8_avg_vert;
      sf->predict[1][0][0] = vp9_convolve8;
      sf->predict[1][0][1] = vp9_convolve8_avg;
    }
  } else {
    if (sf->y_step_q4 == 16) {
      // No scaling in the y direction. Must always scale in the x direction.
      sf->predict[0][0][0] = vp9_convolve8_horiz;
      sf->predict[0][0][1] = vp9_convolve8_avg_horiz;
      sf->predict[0][1][0] = vp9_convolve8;
      sf->predict[0][1][1] = vp9_convolve8_avg;
      sf->predict[1][0][0] = vp9_convolve8_horiz;
      sf->predict[1][0][1] = vp9_convolve8_avg_horiz;
    } else {
      // Must always scale in both directions.
      sf->predict[0][0][0] = vp9_convolve8;
      sf->predict[0][0][1] = vp9_convolve8_avg;
      sf->predict[0][1][0] = vp9_convolve8;
      sf->predict[0][1][1] = vp9_convolve8_avg;
      sf->predict[1][0][0] = vp9_convolve8;
      sf->predict[1][0][1] = vp9_convolve8_avg;
    }
  }
  // 2D subpel motion always gets filtered in both directions
  sf->predict[1][1][0] = vp9_convolve8;
  sf->predict[1][1][1] = vp9_convolve8_avg;
}
Пример #4
0
static void set_offsets_with_scaling(struct scale_factors *scale,
                                     int row, int col) {
  scale->x_offset_q4 = scaled_x(col << SUBPEL_BITS, scale) & SUBPEL_MASK;
  scale->y_offset_q4 = scaled_y(row << SUBPEL_BITS, scale) & SUBPEL_MASK;
}