Rewrite hex search function
Reduced some bound checks in hex search function. Change-Id: Ie5f73a6c227590341c960a74dc508cff80f8aa06
This commit is contained in:
Yunqing Wang
parent
00a1e2f8e4
commit
7838f4cfff
@ -793,12 +793,36 @@ int vp8_find_best_half_pixel_step(MACROBLOCK *mb, BLOCK *b, BLOCKD *d,
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return bestmse;
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}
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#define CHECK_BOUNDS(range) \
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{\
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all_in = 1;\
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all_in &= ((br-range) >= x->mv_row_min);\
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all_in &= ((br+range) <= x->mv_row_max);\
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all_in &= ((bc-range) >= x->mv_col_min);\
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all_in &= ((bc+range) <= x->mv_col_max);\
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}
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#define CHECK_POINT \
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{\
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if (this_mv.as_mv.col < x->mv_col_min) continue;\
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if (this_mv.as_mv.col > x->mv_col_max) continue;\
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if (this_mv.as_mv.row < x->mv_row_min) continue;\
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if (this_mv.as_mv.row > x->mv_row_max) continue;\
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}
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#define CHECK_BETTER \
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{\
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if (thissad < bestsad)\
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{\
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thissad += mvsad_err_cost(&this_mv, &fcenter_mv, mvsadcost, error_per_bit);\
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if (thissad < bestsad)\
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{\
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bestsad = thissad;\
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best_site = i;\
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}\
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}\
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}
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#define MVC(r,c) (((mvsadcost[0][r-rr] + mvsadcost[1][c-rc]) * error_per_bit + 128 )>>8 ) // estimated cost of a motion vector (r,c)
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#define PRE(r,c) (*(d->base_pre) + d->pre + (r) * d->pre_stride + (c)) // pointer to predictor base of a motionvector
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#define DIST(r,c,v) vfp->sdf( src,src_stride,PRE(r,c),d->pre_stride, v) // returns sad error score.
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#define ERR(r,c,v) (MVC(r,c)+DIST(r,c,v)) // returns distortion + motion vector cost
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#define CHECK_BETTER(v,r,c) if ((v = ERR(r,c,besterr)) < besterr) { besterr = v; br=r; bc=c; } // checks if (r,c) has better score than previous best
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static const MV next_chkpts[6][3] =
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{
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{{ -2, 0}, { -1, -2}, {1, -2}},
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@ -808,6 +832,7 @@ static const MV next_chkpts[6][3] =
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{{1, 2}, { -1, 2}, { -2, 0}},
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{{ -1, 2}, { -2, 0}, { -1, -2}}
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};
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int vp8_hex_search
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(
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MACROBLOCK *x,
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@ -825,135 +850,160 @@ int vp8_hex_search
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)
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{
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MV hex[6] = { { -1, -2}, {1, -2}, {2, 0}, {1, 2}, { -1, 2}, { -2, 0} } ;
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//MV neighbors[8] = { { -1, -1}, {0, -1}, {1, -1}, { -1, 0}, {1, 0}, { -1, 1}, {0, 1}, {1, 1} } ;
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MV neighbors[4] = {{0, -1}, { -1, 0}, {1, 0}, {0, 1}} ;
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int i, j;
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unsigned char *src = (*(b->base_src) + b->src);
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int src_stride = b->src_stride;
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int rr = center_mv->as_mv.row, rc = center_mv->as_mv.col;
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int br = ref_mv->as_mv.row >> 3, bc = ref_mv->as_mv.col >> 3, tr, tc;
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unsigned int besterr, thiserr = 0x7fffffff;
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int k = -1, tk;
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if (bc < x->mv_col_min) bc = x->mv_col_min;
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unsigned char *what = (*(b->base_src) + b->src);
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int what_stride = b->src_stride;
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int in_what_stride = d->pre_stride;
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int br = ref_mv->as_mv.row >> 3, bc = ref_mv->as_mv.col >> 3;
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int_mv this_mv;
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unsigned int bestsad = 0x7fffffff;
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unsigned int thissad;
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unsigned char *base_offset;
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unsigned char *this_offset;
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int k = -1;
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int all_in;
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int best_site = -1;
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if (bc > x->mv_col_max) bc = x->mv_col_max;
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int_mv fcenter_mv;
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fcenter_mv.as_mv.row = center_mv->as_mv.row >> 3;
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fcenter_mv.as_mv.col = center_mv->as_mv.col >> 3;
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if (br < x->mv_row_min) br = x->mv_row_min;
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if (br > x->mv_row_max) br = x->mv_row_max;
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rr >>= 3;
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rc >>= 3;
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besterr = ERR(br, bc, thiserr);
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// Work out the start point for the search
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base_offset = (unsigned char *)(*(d->base_pre) + d->pre);
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this_offset = base_offset + (br * (d->pre_stride)) + bc;
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this_mv.as_mv.row = br;
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this_mv.as_mv.col = bc;
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bestsad = vfp->sdf( what, what_stride, this_offset, in_what_stride, 0x7fffffff) + mvsad_err_cost(&this_mv, &fcenter_mv, mvsadcost, error_per_bit);
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// hex search
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//j=0
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tr = br;
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tc = bc;
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CHECK_BOUNDS(2)
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for (i = 0; i < 6; i++)
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if(all_in)
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{
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int nr = tr + hex[i].row, nc = tc + hex[i].col;
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if (nc < x->mv_col_min) continue;
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if (nc > x->mv_col_max) continue;
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if (nr < x->mv_row_min) continue;
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if (nr > x->mv_row_max) continue;
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//CHECK_BETTER(thiserr,nr,nc);
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if ((thiserr = ERR(nr, nc, besterr)) < besterr)
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for (i = 0; i < 6; i++)
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{
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besterr = thiserr;
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br = nr;
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bc = nc;
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k = i;
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this_mv.as_mv.row = br + hex[i].row;
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this_mv.as_mv.col = bc + hex[i].col;
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this_offset = base_offset + (this_mv.as_mv.row * in_what_stride) + this_mv.as_mv.col;
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thissad=vfp->sdf( what, what_stride, this_offset, in_what_stride, bestsad);
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CHECK_BETTER
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}
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}else
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{
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for (i = 0; i < 6; i++)
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{
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this_mv.as_mv.row = br + hex[i].row;
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this_mv.as_mv.col = bc + hex[i].col;
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CHECK_POINT
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this_offset = base_offset + (this_mv.as_mv.row * in_what_stride) + this_mv.as_mv.col;
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thissad=vfp->sdf( what, what_stride, this_offset, in_what_stride, bestsad);
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CHECK_BETTER
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}
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}
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if (tr == br && tc == bc)
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if (best_site == -1)
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goto cal_neighbors;
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else
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{
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br += hex[best_site].row;
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bc += hex[best_site].col;
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k = best_site;
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}
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for (j = 1; j < 127; j++)
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{
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tr = br;
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tc = bc;
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tk = k;
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best_site = -1;
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CHECK_BOUNDS(2)
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for (i = 0; i < 3; i++)
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if(all_in)
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{
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int nr = tr + next_chkpts[tk][i].row, nc = tc + next_chkpts[tk][i].col;
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if (nc < x->mv_col_min) continue;
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if (nc > x->mv_col_max) continue;
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if (nr < x->mv_row_min) continue;
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if (nr > x->mv_row_max) continue;
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//CHECK_BETTER(thiserr,nr,nc);
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if ((thiserr = ERR(nr, nc, besterr)) < besterr)
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for (i = 0; i < 3; i++)
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{
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besterr = thiserr;
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br = nr;
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bc = nc; //k=(tk+5+i)%6;}
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k = tk + 5 + i;
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if (k >= 12) k -= 12;
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else if (k >= 6) k -= 6;
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this_mv.as_mv.row = br + next_chkpts[k][i].row;
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this_mv.as_mv.col = bc + next_chkpts[k][i].col;
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this_offset = base_offset + (this_mv.as_mv.row * (in_what_stride)) + this_mv.as_mv.col;
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thissad = vfp->sdf( what, what_stride, this_offset, in_what_stride, bestsad);
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CHECK_BETTER
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}
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}else
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{
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for (i = 0; i < 3; i++)
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{
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this_mv.as_mv.row = br + next_chkpts[k][i].row;
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this_mv.as_mv.col = bc + next_chkpts[k][i].col;
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CHECK_POINT
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this_offset = base_offset + (this_mv.as_mv.row * (in_what_stride)) + this_mv.as_mv.col;
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thissad = vfp->sdf( what, what_stride, this_offset, in_what_stride, bestsad);
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CHECK_BETTER
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}
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}
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if (tr == br && tc == bc)
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if (best_site == -1)
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break;
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else
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{
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br += next_chkpts[k][best_site].row;
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bc += next_chkpts[k][best_site].col;
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k += 5 + best_site;
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if (k >= 12) k -= 12;
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else if (k >= 6) k -= 6;
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}
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}
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// check 4 1-away neighbors
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cal_neighbors:
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for (j = 0; j < 32; j++)
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{
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tr = br;
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tc = bc;
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best_site = -1;
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CHECK_BOUNDS(1)
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for (i = 0; i < 4; i++)
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if(all_in)
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{
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int nr = tr + neighbors[i].row, nc = tc + neighbors[i].col;
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if (nc < x->mv_col_min) continue;
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if (nc > x->mv_col_max) continue;
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if (nr < x->mv_row_min) continue;
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if (nr > x->mv_row_max) continue;
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CHECK_BETTER(thiserr, nr, nc);
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for (i = 0; i < 4; i++)
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{
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this_mv.as_mv.row = br + neighbors[i].row;
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this_mv.as_mv.col = bc + neighbors[i].col;
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this_offset = base_offset + (this_mv.as_mv.row * (in_what_stride)) + this_mv.as_mv.col;
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thissad = vfp->sdf( what, what_stride, this_offset, in_what_stride, bestsad);
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CHECK_BETTER
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}
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}else
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{
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for (i = 0; i < 4; i++)
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{
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this_mv.as_mv.row = br + neighbors[i].row;
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this_mv.as_mv.col = bc + neighbors[i].col;
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CHECK_POINT
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this_offset = base_offset + (this_mv.as_mv.row * (in_what_stride)) + this_mv.as_mv.col;
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thissad = vfp->sdf( what, what_stride, this_offset, in_what_stride, bestsad);
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CHECK_BETTER
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}
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}
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if (tr == br && tc == bc)
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if (best_site == -1)
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break;
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else
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{
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br += neighbors[best_site].row;
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bc += neighbors[best_site].col;
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}
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}
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best_mv->as_mv.row = br;
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best_mv->as_mv.col = bc;
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this_mv.as_mv.row = br<<3;
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this_mv.as_mv.col = bc<<3;
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return vfp->vf(src, src_stride, PRE(br, bc), d->pre_stride, &thiserr) + mv_err_cost(best_mv, center_mv, mvcost, error_per_bit) ;
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this_offset = (unsigned char *)(*(d->base_pre) + d->pre + (br * (in_what_stride)) + bc);
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return vfp->vf(what, what_stride, this_offset, in_what_stride, &bestsad) + mv_err_cost(&this_mv, center_mv, mvcost, error_per_bit) ;
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}
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#undef MVC
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#undef PRE
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#undef SP
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#undef DIST
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#undef ERR
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#undef CHECK_BOUNDS
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#undef CHECK_POINT
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#undef CHECK_BETTER
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int vp8_diamond_search_sad
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(
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MACROBLOCK *x,
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