The Tor Browser: media/libvpx/vp8/encoder/mcomp.c@ac0c01689b40 (annotated)

media/libvpx/vp8/encoder/mcomp.c@ac0c01689b40 (annotated)

media/libvpx/vp8/encoder/mcomp.c

Thu, 15 Jan 2015 15:59:08 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 15 Jan 2015 15:59:08 +0100
branch: TOR_BUG_9701
changeset 10: ac0c01689b40
permissions: -rw-r--r--

Implement a real Private Browsing Mode condition by changing the API/ABI;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

 /*
  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 #include "onyx_int.h"
 #include "mcomp.h"
 #include "vpx_mem/vpx_mem.h"
 #include "vpx_config.h"
 #include <stdio.h>
 #include <limits.h>
 #include <math.h>
 #include "vp8/common/findnearmv.h"
 #ifdef VP8_ENTROPY_STATS
 static int mv_ref_ct [31] [4] [2];
 static int mv_mode_cts [4] [2];
 #endif
 int vp8_mv_bit_cost(int_mv *mv, int_mv *ref, int *mvcost[2], int Weight)
 {
     /* MV costing is based on the distribution of vectors in the previous
      * frame and as such will tend to over state the cost of vectors. In
      * addition coding a new vector can have a knock on effect on the cost
      * of subsequent vectors and the quality of prediction from NEAR and
      * NEAREST for subsequent blocks. The "Weight" parameter allows, to a
      * limited extent, for some account to be taken of these factors.
      */
     return ((mvcost[0][(mv->as_mv.row - ref->as_mv.row) >> 1] + mvcost[1][(mv->as_mv.col - ref->as_mv.col) >> 1]) * Weight) >> 7;
 }
 static int mv_err_cost(int_mv *mv, int_mv *ref, int *mvcost[2], int error_per_bit)
 {
     /* Ignore mv costing if mvcost is NULL */
     if (mvcost)
         return ((mvcost[0][(mv->as_mv.row - ref->as_mv.row) >> 1] +
                  mvcost[1][(mv->as_mv.col - ref->as_mv.col) >> 1])
                  * error_per_bit + 128) >> 8;
     return 0;
 }
 static int mvsad_err_cost(int_mv *mv, int_mv *ref, int *mvsadcost[2], int error_per_bit)
 {
     /* Calculate sad error cost on full pixel basis. */
     /* Ignore mv costing if mvsadcost is NULL */
     if (mvsadcost)
         return ((mvsadcost[0][(mv->as_mv.row - ref->as_mv.row)] +
                  mvsadcost[1][(mv->as_mv.col - ref->as_mv.col)])
                 * error_per_bit + 128) >> 8;
     return 0;
 }
 void vp8_init_dsmotion_compensation(MACROBLOCK *x, int stride)
 {
     int Len;
     int search_site_count = 0;
     /* Generate offsets for 4 search sites per step. */
     Len = MAX_FIRST_STEP;
     x->ss[search_site_count].mv.col = 0;
     x->ss[search_site_count].mv.row = 0;
     x->ss[search_site_count].offset = 0;
     search_site_count++;
     while (Len > 0)
     {
         /* Compute offsets for search sites. */
         x->ss[search_site_count].mv.col = 0;
         x->ss[search_site_count].mv.row = -Len;
         x->ss[search_site_count].offset = -Len * stride;
         search_site_count++;
         /* Compute offsets for search sites. */
         x->ss[search_site_count].mv.col = 0;
         x->ss[search_site_count].mv.row = Len;
         x->ss[search_site_count].offset = Len * stride;
         search_site_count++;
         /* Compute offsets for search sites. */
         x->ss[search_site_count].mv.col = -Len;
         x->ss[search_site_count].mv.row = 0;
         x->ss[search_site_count].offset = -Len;
         search_site_count++;
         /* Compute offsets for search sites. */
         x->ss[search_site_count].mv.col = Len;
         x->ss[search_site_count].mv.row = 0;
         x->ss[search_site_count].offset = Len;
         search_site_count++;
         /* Contract. */
         Len /= 2;
     }
     x->ss_count = search_site_count;
     x->searches_per_step = 4;
 }
 void vp8_init3smotion_compensation(MACROBLOCK *x, int stride)
 {
     int Len;
     int search_site_count = 0;
     /* Generate offsets for 8 search sites per step. */
     Len = MAX_FIRST_STEP;
     x->ss[search_site_count].mv.col = 0;
     x->ss[search_site_count].mv.row = 0;
     x->ss[search_site_count].offset = 0;
     search_site_count++;
     while (Len > 0)
     {
         /* Compute offsets for search sites. */
         x->ss[search_site_count].mv.col = 0;
         x->ss[search_site_count].mv.row = -Len;
         x->ss[search_site_count].offset = -Len * stride;
         search_site_count++;
         /* Compute offsets for search sites. */
         x->ss[search_site_count].mv.col = 0;
         x->ss[search_site_count].mv.row = Len;
         x->ss[search_site_count].offset = Len * stride;
         search_site_count++;
         /* Compute offsets for search sites. */
         x->ss[search_site_count].mv.col = -Len;
         x->ss[search_site_count].mv.row = 0;
         x->ss[search_site_count].offset = -Len;
         search_site_count++;
         /* Compute offsets for search sites. */
         x->ss[search_site_count].mv.col = Len;
         x->ss[search_site_count].mv.row = 0;
         x->ss[search_site_count].offset = Len;
         search_site_count++;
         /* Compute offsets for search sites. */
         x->ss[search_site_count].mv.col = -Len;
         x->ss[search_site_count].mv.row = -Len;
         x->ss[search_site_count].offset = -Len * stride - Len;
         search_site_count++;
         /* Compute offsets for search sites. */
         x->ss[search_site_count].mv.col = Len;
         x->ss[search_site_count].mv.row = -Len;
         x->ss[search_site_count].offset = -Len * stride + Len;
         search_site_count++;
         /* Compute offsets for search sites. */
         x->ss[search_site_count].mv.col = -Len;
         x->ss[search_site_count].mv.row = Len;
         x->ss[search_site_count].offset = Len * stride - Len;
         search_site_count++;
         /* Compute offsets for search sites. */
         x->ss[search_site_count].mv.col = Len;
         x->ss[search_site_count].mv.row = Len;
         x->ss[search_site_count].offset = Len * stride + Len;
         search_site_count++;
         /* Contract. */
         Len /= 2;
     }
     x->ss_count = search_site_count;
     x->searches_per_step = 8;
 }
 /*
  * To avoid the penalty for crossing cache-line read, preload the reference
  * area in a small buffer, which is aligned to make sure there won't be crossing
  * cache-line read while reading from this buffer. This reduced the cpu
  * cycles spent on reading ref data in sub-pixel filter functions.
  * TODO: Currently, since sub-pixel search range here is -3 ~ 3, copy 22 rows x
  * 32 cols area that is enough for 16x16 macroblock. Later, for SPLITMV, we
  * could reduce the area.
  */
 /* estimated cost of a motion vector (r,c) */
 #define MVC(r,c) (mvcost ? ((mvcost[0][(r)-rr] + mvcost[1][(c) - rc]) * error_per_bit + 128 )>>8 : 0)
 /* pointer to predictor base of a motionvector */
 #define PRE(r,c) (y + (((r)>>2) * y_stride + ((c)>>2) -(offset)))
 /* convert motion vector component to offset for svf calc */
 #define SP(x) (((x)&3)<<1)
 /* returns subpixel variance error function. */
 #define DIST(r,c) vfp->svf( PRE(r,c), y_stride, SP(c),SP(r), z,b->src_stride,&sse)
 #define IFMVCV(r,c,s,e) if ( c >= minc && c <= maxc && r >= minr && r <= maxr) s else e;
 /* returns distortion + motion vector cost */
 #define ERR(r,c) (MVC(r,c)+DIST(r,c))
 /* checks if (r,c) has better score than previous best */
 #define CHECK_BETTER(v,r,c) IFMVCV(r,c,{thismse = DIST(r,c); if((v = (MVC(r,c)+thismse)) < besterr) { besterr = v; br=r; bc=c; *distortion = thismse; *sse1 = sse; }}, v=UINT_MAX;)
 int vp8_find_best_sub_pixel_step_iteratively(MACROBLOCK *x, BLOCK *b, BLOCKD *d,
                                              int_mv *bestmv, int_mv *ref_mv,
                                              int error_per_bit,
                                              const vp8_variance_fn_ptr_t *vfp,
                                              int *mvcost[2], int *distortion,
                                              unsigned int *sse1)
 {
     unsigned char *z = (*(b->base_src) + b->src);
     int rr = ref_mv->as_mv.row >> 1, rc = ref_mv->as_mv.col >> 1;
     int br = bestmv->as_mv.row * 4, bc = bestmv->as_mv.col * 4;
     int tr = br, tc = bc;
     unsigned int besterr;
     unsigned int left, right, up, down, diag;
     unsigned int sse;
     unsigned int whichdir;
     unsigned int halfiters = 4;
     unsigned int quarteriters = 4;
     int thismse;
     int minc = MAX(x->mv_col_min * 4,
                    (ref_mv->as_mv.col >> 1) - ((1 << mvlong_width) - 1));
     int maxc = MIN(x->mv_col_max * 4,
                    (ref_mv->as_mv.col >> 1) + ((1 << mvlong_width) - 1));
     int minr = MAX(x->mv_row_min * 4,
                    (ref_mv->as_mv.row >> 1) - ((1 << mvlong_width) - 1));
     int maxr = MIN(x->mv_row_max * 4,
                    (ref_mv->as_mv.row >> 1) + ((1 << mvlong_width) - 1));
     int y_stride;
     int offset;
     int pre_stride = x->e_mbd.pre.y_stride;
     unsigned char *base_pre = x->e_mbd.pre.y_buffer;
 #if ARCH_X86 || ARCH_X86_64
     MACROBLOCKD *xd = &x->e_mbd;
     unsigned char *y_0 = base_pre + d->offset + (bestmv->as_mv.row) * pre_stride + bestmv->as_mv.col;
     unsigned char *y;
     int buf_r1, buf_r2, buf_c1;
     /* Clamping to avoid out-of-range data access */
     buf_r1 = ((bestmv->as_mv.row - 3) < x->mv_row_min)?(bestmv->as_mv.row - x->mv_row_min):3;
     buf_r2 = ((bestmv->as_mv.row + 3) > x->mv_row_max)?(x->mv_row_max - bestmv->as_mv.row):3;
     buf_c1 = ((bestmv->as_mv.col - 3) < x->mv_col_min)?(bestmv->as_mv.col - x->mv_col_min):3;
     y_stride = 32;
     /* Copy to intermediate buffer before searching. */
     vfp->copymem(y_0 - buf_c1 - pre_stride*buf_r1, pre_stride, xd->y_buf, y_stride, 16+buf_r1+buf_r2);
     y = xd->y_buf + y_stride*buf_r1 +buf_c1;
 #else
     unsigned char *y = base_pre + d->offset + (bestmv->as_mv.row) * pre_stride + bestmv->as_mv.col;
     y_stride = pre_stride;
 #endif
     offset = (bestmv->as_mv.row) * y_stride + bestmv->as_mv.col;
     /* central mv */
     bestmv->as_mv.row *= 8;
     bestmv->as_mv.col *= 8;
     /* calculate central point error */
     besterr = vfp->vf(y, y_stride, z, b->src_stride, sse1);
     *distortion = besterr;
     besterr += mv_err_cost(bestmv, ref_mv, mvcost, error_per_bit);
     /* TODO: Each subsequent iteration checks at least one point in common
      * with the last iteration could be 2 ( if diag selected)
      */
     while (--halfiters)
     {
         /* 1/2 pel */
         CHECK_BETTER(left, tr, tc - 2);
         CHECK_BETTER(right, tr, tc + 2);
         CHECK_BETTER(up, tr - 2, tc);
         CHECK_BETTER(down, tr + 2, tc);
         whichdir = (left < right ? 0 : 1) + (up < down ? 0 : 2);
         switch (whichdir)
         {
         case 0:
             CHECK_BETTER(diag, tr - 2, tc - 2);
             break;
         case 1:
             CHECK_BETTER(diag, tr - 2, tc + 2);
             break;
         case 2:
             CHECK_BETTER(diag, tr + 2, tc - 2);
             break;
         case 3:
             CHECK_BETTER(diag, tr + 2, tc + 2);
             break;
         }
         /* no reason to check the same one again. */
         if (tr == br && tc == bc)
             break;
         tr = br;
         tc = bc;
     }
     /* TODO: Each subsequent iteration checks at least one point in common
      * with the last iteration could be 2 ( if diag selected)
      */
     /* 1/4 pel */
     while (--quarteriters)
     {
         CHECK_BETTER(left, tr, tc - 1);
         CHECK_BETTER(right, tr, tc + 1);
         CHECK_BETTER(up, tr - 1, tc);
         CHECK_BETTER(down, tr + 1, tc);
         whichdir = (left < right ? 0 : 1) + (up < down ? 0 : 2);
         switch (whichdir)
         {
         case 0:
             CHECK_BETTER(diag, tr - 1, tc - 1);
             break;
         case 1:
             CHECK_BETTER(diag, tr - 1, tc + 1);
             break;
         case 2:
             CHECK_BETTER(diag, tr + 1, tc - 1);
             break;
         case 3:
             CHECK_BETTER(diag, tr + 1, tc + 1);
             break;
         }
         /* no reason to check the same one again. */
         if (tr == br && tc == bc)
             break;
         tr = br;
         tc = bc;
     }
     bestmv->as_mv.row = br * 2;
     bestmv->as_mv.col = bc * 2;
     if ((abs(bestmv->as_mv.col - ref_mv->as_mv.col) > (MAX_FULL_PEL_VAL<<3)) ||
         (abs(bestmv->as_mv.row - ref_mv->as_mv.row) > (MAX_FULL_PEL_VAL<<3)))
         return INT_MAX;
     return besterr;
 }
 #undef MVC
 #undef PRE
 #undef SP
 #undef DIST
 #undef IFMVCV
 #undef ERR
 #undef CHECK_BETTER
 int vp8_find_best_sub_pixel_step(MACROBLOCK *x, BLOCK *b, BLOCKD *d,
                                  int_mv *bestmv, int_mv *ref_mv,
                                  int error_per_bit,
                                  const vp8_variance_fn_ptr_t *vfp,
                                  int *mvcost[2], int *distortion,
                                  unsigned int *sse1)
 {
     int bestmse = INT_MAX;
     int_mv startmv;
     int_mv this_mv;
     unsigned char *z = (*(b->base_src) + b->src);
     int left, right, up, down, diag;
     unsigned int sse;
     int whichdir ;
     int thismse;
     int y_stride;
     int pre_stride = x->e_mbd.pre.y_stride;
     unsigned char *base_pre = x->e_mbd.pre.y_buffer;
 #if ARCH_X86 || ARCH_X86_64
     MACROBLOCKD *xd = &x->e_mbd;
     unsigned char *y_0 = base_pre + d->offset + (bestmv->as_mv.row) * pre_stride + bestmv->as_mv.col;
     unsigned char *y;
     y_stride = 32;
     /* Copy 18 rows x 32 cols area to intermediate buffer before searching. */
      vfp->copymem(y_0 - 1 - pre_stride, pre_stride, xd->y_buf, y_stride, 18);
      y = xd->y_buf + y_stride + 1;
 #else
      unsigned char *y = base_pre + d->offset + (bestmv->as_mv.row) * pre_stride + bestmv->as_mv.col;
      y_stride = pre_stride;
 #endif
     /* central mv */
     bestmv->as_mv.row <<= 3;
     bestmv->as_mv.col <<= 3;
     startmv = *bestmv;
     /* calculate central point error */
     bestmse = vfp->vf(y, y_stride, z, b->src_stride, sse1);
     *distortion = bestmse;
     bestmse += mv_err_cost(bestmv, ref_mv, mvcost, error_per_bit);
     /* go left then right and check error */
     this_mv.as_mv.row = startmv.as_mv.row;
     this_mv.as_mv.col = ((startmv.as_mv.col - 8) | 4);
     thismse = vfp->svf_halfpix_h(y - 1, y_stride, z, b->src_stride, &sse);
     left = thismse + mv_err_cost(&this_mv, ref_mv, mvcost, error_per_bit);
     if (left < bestmse)
     {
         *bestmv = this_mv;
         bestmse = left;
         *distortion = thismse;
         *sse1 = sse;
     }
     this_mv.as_mv.col += 8;
     thismse = vfp->svf_halfpix_h(y, y_stride, z, b->src_stride, &sse);
     right = thismse + mv_err_cost(&this_mv, ref_mv, mvcost, error_per_bit);
     if (right < bestmse)
     {
         *bestmv = this_mv;
         bestmse = right;
         *distortion = thismse;
         *sse1 = sse;
     }
     /* go up then down and check error */
     this_mv.as_mv.col = startmv.as_mv.col;
     this_mv.as_mv.row = ((startmv.as_mv.row - 8) | 4);
     thismse =  vfp->svf_halfpix_v(y - y_stride, y_stride, z, b->src_stride, &sse);
     up = thismse + mv_err_cost(&this_mv, ref_mv, mvcost, error_per_bit);
     if (up < bestmse)
     {
         *bestmv = this_mv;
         bestmse = up;
         *distortion = thismse;
         *sse1 = sse;
     }
     this_mv.as_mv.row += 8;
     thismse = vfp->svf_halfpix_v(y, y_stride, z, b->src_stride, &sse);
     down = thismse + mv_err_cost(&this_mv, ref_mv, mvcost, error_per_bit);
     if (down < bestmse)
     {
         *bestmv = this_mv;
         bestmse = down;
         *distortion = thismse;
         *sse1 = sse;
     }
     /* now check 1 more diagonal */
     whichdir = (left < right ? 0 : 1) + (up < down ? 0 : 2);
     this_mv = startmv;
     switch (whichdir)
     {
     case 0:
         this_mv.as_mv.col = (this_mv.as_mv.col - 8) | 4;
         this_mv.as_mv.row = (this_mv.as_mv.row - 8) | 4;
         thismse = vfp->svf_halfpix_hv(y - 1 - y_stride, y_stride, z, b->src_stride, &sse);
         break;
     case 1:
         this_mv.as_mv.col += 4;
         this_mv.as_mv.row = (this_mv.as_mv.row - 8) | 4;
         thismse = vfp->svf_halfpix_hv(y - y_stride, y_stride, z, b->src_stride, &sse);
         break;
     case 2:
         this_mv.as_mv.col = (this_mv.as_mv.col - 8) | 4;
         this_mv.as_mv.row += 4;
         thismse = vfp->svf_halfpix_hv(y - 1, y_stride, z, b->src_stride, &sse);
         break;
     case 3:
     default:
         this_mv.as_mv.col += 4;
         this_mv.as_mv.row += 4;
         thismse = vfp->svf_halfpix_hv(y, y_stride, z, b->src_stride, &sse);
         break;
     }
     diag = thismse + mv_err_cost(&this_mv, ref_mv, mvcost, error_per_bit);
     if (diag < bestmse)
     {
         *bestmv = this_mv;
         bestmse = diag;
         *distortion = thismse;
         *sse1 = sse;
     }
     /* time to check quarter pels. */
     if (bestmv->as_mv.row < startmv.as_mv.row)
         y -= y_stride;
     if (bestmv->as_mv.col < startmv.as_mv.col)
         y--;
     startmv = *bestmv;
     /* go left then right and check error */
     this_mv.as_mv.row = startmv.as_mv.row;
     if (startmv.as_mv.col & 7)
     {
         this_mv.as_mv.col = startmv.as_mv.col - 2;
         thismse = vfp->svf(y, y_stride, this_mv.as_mv.col & 7, this_mv.as_mv.row & 7, z, b->src_stride, &sse);
     }
     else
     {
         this_mv.as_mv.col = (startmv.as_mv.col - 8) | 6;
         thismse = vfp->svf(y - 1, y_stride, 6, this_mv.as_mv.row & 7, z, b->src_stride, &sse);
     }
     left = thismse + mv_err_cost(&this_mv, ref_mv, mvcost, error_per_bit);
     if (left < bestmse)
     {
         *bestmv = this_mv;
         bestmse = left;
         *distortion = thismse;
         *sse1 = sse;
     }
     this_mv.as_mv.col += 4;
     thismse = vfp->svf(y, y_stride, this_mv.as_mv.col & 7, this_mv.as_mv.row & 7, z, b->src_stride, &sse);
     right = thismse + mv_err_cost(&this_mv, ref_mv, mvcost, error_per_bit);
     if (right < bestmse)
     {
         *bestmv = this_mv;
         bestmse = right;
         *distortion = thismse;
         *sse1 = sse;
     }
     /* go up then down and check error */
     this_mv.as_mv.col = startmv.as_mv.col;
     if (startmv.as_mv.row & 7)
     {
         this_mv.as_mv.row = startmv.as_mv.row - 2;
         thismse = vfp->svf(y, y_stride, this_mv.as_mv.col & 7, this_mv.as_mv.row & 7, z, b->src_stride, &sse);
     }
     else
     {
         this_mv.as_mv.row = (startmv.as_mv.row - 8) | 6;
         thismse = vfp->svf(y - y_stride, y_stride, this_mv.as_mv.col & 7, 6, z, b->src_stride, &sse);
     }
     up = thismse + mv_err_cost(&this_mv, ref_mv, mvcost, error_per_bit);
     if (up < bestmse)
     {
         *bestmv = this_mv;
         bestmse = up;
         *distortion = thismse;
         *sse1 = sse;
     }
     this_mv.as_mv.row += 4;
     thismse = vfp->svf(y, y_stride, this_mv.as_mv.col & 7, this_mv.as_mv.row & 7, z, b->src_stride, &sse);
     down = thismse + mv_err_cost(&this_mv, ref_mv, mvcost, error_per_bit);
     if (down < bestmse)
     {
         *bestmv = this_mv;
         bestmse = down;
         *distortion = thismse;
         *sse1 = sse;
     }
     /* now check 1 more diagonal */
     whichdir = (left < right ? 0 : 1) + (up < down ? 0 : 2);
     this_mv = startmv;
     switch (whichdir)
     {
     case 0:
         if (startmv.as_mv.row & 7)
         {
             this_mv.as_mv.row -= 2;
             if (startmv.as_mv.col & 7)
             {
                 this_mv.as_mv.col -= 2;
                 thismse = vfp->svf(y, y_stride, this_mv.as_mv.col & 7, this_mv.as_mv.row & 7, z, b->src_stride, &sse);
             }
             else
             {
                 this_mv.as_mv.col = (startmv.as_mv.col - 8) | 6;
                 thismse = vfp->svf(y - 1, y_stride, 6, this_mv.as_mv.row & 7, z, b->src_stride, &sse);;
             }
         }
         else
         {
             this_mv.as_mv.row = (startmv.as_mv.row - 8) | 6;
             if (startmv.as_mv.col & 7)
             {
                 this_mv.as_mv.col -= 2;
                 thismse = vfp->svf(y - y_stride, y_stride, this_mv.as_mv.col & 7, 6, z, b->src_stride, &sse);
             }
             else
             {
                 this_mv.as_mv.col = (startmv.as_mv.col - 8) | 6;
                 thismse = vfp->svf(y - y_stride - 1, y_stride, 6, 6, z, b->src_stride, &sse);
             }
         }
         break;
     case 1:
         this_mv.as_mv.col += 2;
         if (startmv.as_mv.row & 7)
         {
             this_mv.as_mv.row -= 2;
             thismse = vfp->svf(y, y_stride, this_mv.as_mv.col & 7, this_mv.as_mv.row & 7, z, b->src_stride, &sse);
         }
         else
         {
             this_mv.as_mv.row = (startmv.as_mv.row - 8) | 6;
             thismse = vfp->svf(y - y_stride, y_stride, this_mv.as_mv.col & 7, 6, z, b->src_stride, &sse);
         }
         break;
     case 2:
         this_mv.as_mv.row += 2;
         if (startmv.as_mv.col & 7)
         {
             this_mv.as_mv.col -= 2;
             thismse = vfp->svf(y, y_stride, this_mv.as_mv.col & 7, this_mv.as_mv.row & 7, z, b->src_stride, &sse);
         }
         else
         {
             this_mv.as_mv.col = (startmv.as_mv.col - 8) | 6;
             thismse = vfp->svf(y - 1, y_stride, 6, this_mv.as_mv.row & 7, z, b->src_stride, &sse);
         }
         break;
     case 3:
         this_mv.as_mv.col += 2;
         this_mv.as_mv.row += 2;
         thismse = vfp->svf(y, y_stride,  this_mv.as_mv.col & 7, this_mv.as_mv.row & 7, z, b->src_stride, &sse);
         break;
     }
     diag = thismse + mv_err_cost(&this_mv, ref_mv, mvcost, error_per_bit);
     if (diag < bestmse)
     {
         *bestmv = this_mv;
         bestmse = diag;
         *distortion = thismse;
         *sse1 = sse;
     }
     return bestmse;
 }
 int vp8_find_best_half_pixel_step(MACROBLOCK *x, BLOCK *b, BLOCKD *d,
                                   int_mv *bestmv, int_mv *ref_mv,
                                   int error_per_bit,
                                   const vp8_variance_fn_ptr_t *vfp,
                                   int *mvcost[2], int *distortion,
                                   unsigned int *sse1)
 {
     int bestmse = INT_MAX;
     int_mv startmv;
     int_mv this_mv;
     unsigned char *z = (*(b->base_src) + b->src);
     int left, right, up, down, diag;
     unsigned int sse;
     int whichdir ;
     int thismse;
     int y_stride;
     int pre_stride = x->e_mbd.pre.y_stride;
     unsigned char *base_pre = x->e_mbd.pre.y_buffer;
 #if ARCH_X86 || ARCH_X86_64
     MACROBLOCKD *xd = &x->e_mbd;
     unsigned char *y_0 = base_pre + d->offset + (bestmv->as_mv.row) * pre_stride + bestmv->as_mv.col;
     unsigned char *y;
     y_stride = 32;
     /* Copy 18 rows x 32 cols area to intermediate buffer before searching. */
     vfp->copymem(y_0 - 1 - pre_stride, pre_stride, xd->y_buf, y_stride, 18);
     y = xd->y_buf + y_stride + 1;
 #else
     unsigned char *y = base_pre + d->offset + (bestmv->as_mv.row) * pre_stride + bestmv->as_mv.col;
     y_stride = pre_stride;
 #endif
     /* central mv */
     bestmv->as_mv.row *= 8;
     bestmv->as_mv.col *= 8;
     startmv = *bestmv;
     /* calculate central point error */
     bestmse = vfp->vf(y, y_stride, z, b->src_stride, sse1);
     *distortion = bestmse;
     bestmse += mv_err_cost(bestmv, ref_mv, mvcost, error_per_bit);
     /* go left then right and check error */
     this_mv.as_mv.row = startmv.as_mv.row;
     this_mv.as_mv.col = ((startmv.as_mv.col - 8) | 4);
     thismse = vfp->svf_halfpix_h(y - 1, y_stride, z, b->src_stride, &sse);
     left = thismse + mv_err_cost(&this_mv, ref_mv, mvcost, error_per_bit);
     if (left < bestmse)
     {
         *bestmv = this_mv;
         bestmse = left;
         *distortion = thismse;
         *sse1 = sse;
     }
     this_mv.as_mv.col += 8;
     thismse = vfp->svf_halfpix_h(y, y_stride, z, b->src_stride, &sse);
     right = thismse + mv_err_cost(&this_mv, ref_mv, mvcost, error_per_bit);
     if (right < bestmse)
     {
         *bestmv = this_mv;
         bestmse = right;
         *distortion = thismse;
         *sse1 = sse;
     }
     /* go up then down and check error */
     this_mv.as_mv.col = startmv.as_mv.col;
     this_mv.as_mv.row = ((startmv.as_mv.row - 8) | 4);
     thismse = vfp->svf_halfpix_v(y - y_stride, y_stride, z, b->src_stride, &sse);
     up = thismse + mv_err_cost(&this_mv, ref_mv, mvcost, error_per_bit);
     if (up < bestmse)
     {
         *bestmv = this_mv;
         bestmse = up;
         *distortion = thismse;
         *sse1 = sse;
     }
     this_mv.as_mv.row += 8;
     thismse = vfp->svf_halfpix_v(y, y_stride, z, b->src_stride, &sse);
     down = thismse + mv_err_cost(&this_mv, ref_mv, mvcost, error_per_bit);
     if (down < bestmse)
     {
         *bestmv = this_mv;
         bestmse = down;
         *distortion = thismse;
         *sse1 = sse;
     }
     /* now check 1 more diagonal - */
     whichdir = (left < right ? 0 : 1) + (up < down ? 0 : 2);
     this_mv = startmv;
     switch (whichdir)
     {
     case 0:
         this_mv.as_mv.col = (this_mv.as_mv.col - 8) | 4;
         this_mv.as_mv.row = (this_mv.as_mv.row - 8) | 4;
         thismse = vfp->svf_halfpix_hv(y - 1 - y_stride, y_stride, z, b->src_stride, &sse);
         break;
     case 1:
         this_mv.as_mv.col += 4;
         this_mv.as_mv.row = (this_mv.as_mv.row - 8) | 4;
         thismse = vfp->svf_halfpix_hv(y - y_stride, y_stride, z, b->src_stride, &sse);
         break;
     case 2:
         this_mv.as_mv.col = (this_mv.as_mv.col - 8) | 4;
         this_mv.as_mv.row += 4;
         thismse = vfp->svf_halfpix_hv(y - 1, y_stride, z, b->src_stride, &sse);
         break;
     case 3:
     default:
         this_mv.as_mv.col += 4;
         this_mv.as_mv.row += 4;
         thismse = vfp->svf_halfpix_hv(y, y_stride, z, b->src_stride, &sse);
         break;
     }
     diag = thismse + mv_err_cost(&this_mv, ref_mv, mvcost, error_per_bit);
     if (diag < bestmse)
     {
         *bestmv = this_mv;
         bestmse = diag;
         *distortion = thismse;
         *sse1 = sse;
     }
     return bestmse;
 }
 #define CHECK_BOUNDS(range) \
 {\
     all_in = 1;\
     all_in &= ((br-range) >= x->mv_row_min);\
     all_in &= ((br+range) <= x->mv_row_max);\
     all_in &= ((bc-range) >= x->mv_col_min);\
     all_in &= ((bc+range) <= x->mv_col_max);\
 }
 #define CHECK_POINT \
 {\
     if (this_mv.as_mv.col < x->mv_col_min) continue;\
     if (this_mv.as_mv.col > x->mv_col_max) continue;\
     if (this_mv.as_mv.row < x->mv_row_min) continue;\
     if (this_mv.as_mv.row > x->mv_row_max) continue;\
 }
 #define CHECK_BETTER \
 {\
     if (thissad < bestsad)\
     {\
         thissad += mvsad_err_cost(&this_mv, &fcenter_mv, mvsadcost, sad_per_bit);\
         if (thissad < bestsad)\
         {\
             bestsad = thissad;\
             best_site = i;\
         }\
     }\
 }
 static const MV next_chkpts[6][3] =
 {
     {{ -2, 0}, { -1, -2}, {1, -2}},
     {{ -1, -2}, {1, -2}, {2, 0}},
     {{1, -2}, {2, 0}, {1, 2}},
     {{2, 0}, {1, 2}, { -1, 2}},
     {{1, 2}, { -1, 2}, { -2, 0}},
     {{ -1, 2}, { -2, 0}, { -1, -2}}
 };
 int vp8_hex_search
 (
     MACROBLOCK *x,
     BLOCK *b,
     BLOCKD *d,
     int_mv *ref_mv,
     int_mv *best_mv,
     int search_param,
     int sad_per_bit,
     const vp8_variance_fn_ptr_t *vfp,
     int *mvsadcost[2],
     int *mvcost[2],
     int_mv *center_mv
 )
 {
     MV hex[6] = { { -1, -2}, {1, -2}, {2, 0}, {1, 2}, { -1, 2}, { -2, 0} } ;
     MV neighbors[4] = {{0, -1}, { -1, 0}, {1, 0}, {0, 1}} ;
     int i, j;
     unsigned char *what = (*(b->base_src) + b->src);
     int what_stride = b->src_stride;
     int pre_stride = x->e_mbd.pre.y_stride;
     unsigned char *base_pre = x->e_mbd.pre.y_buffer;
     int in_what_stride = pre_stride;
     int br, bc;
     int_mv this_mv;
     unsigned int bestsad;
     unsigned int thissad;
     unsigned char *base_offset;
     unsigned char *this_offset;
     int k = -1;
     int all_in;
     int best_site = -1;
     int hex_range = 127;
     int dia_range = 8;
     int_mv fcenter_mv;
     fcenter_mv.as_mv.row = center_mv->as_mv.row >> 3;
     fcenter_mv.as_mv.col = center_mv->as_mv.col >> 3;
     /* adjust ref_mv to make sure it is within MV range */
     vp8_clamp_mv(ref_mv, x->mv_col_min, x->mv_col_max, x->mv_row_min, x->mv_row_max);
     br = ref_mv->as_mv.row;
     bc = ref_mv->as_mv.col;
     /* Work out the start point for the search */
     base_offset = (unsigned char *)(base_pre + d->offset);
     this_offset = base_offset + (br * (pre_stride)) + bc;
     this_mv.as_mv.row = br;
     this_mv.as_mv.col = bc;
     bestsad = vfp->sdf(what, what_stride, this_offset, in_what_stride, UINT_MAX)
             + mvsad_err_cost(&this_mv, &fcenter_mv, mvsadcost, sad_per_bit);
 #if CONFIG_MULTI_RES_ENCODING
     /* Lower search range based on prediction info */
     if (search_param >= 6) goto cal_neighbors;
     else if (search_param >= 5) hex_range = 4;
     else if (search_param >= 4) hex_range = 6;
     else if (search_param >= 3) hex_range = 15;
     else if (search_param >= 2) hex_range = 31;
     else if (search_param >= 1) hex_range = 63;
     dia_range = 8;
 #endif
     /* hex search */
     CHECK_BOUNDS(2)
     if(all_in)
     {
         for (i = 0; i < 6; i++)
         {
             this_mv.as_mv.row = br + hex[i].row;
             this_mv.as_mv.col = bc + hex[i].col;
             this_offset = base_offset + (this_mv.as_mv.row * in_what_stride) + this_mv.as_mv.col;
             thissad = vfp->sdf(what, what_stride, this_offset, in_what_stride, bestsad);
             CHECK_BETTER
         }
     }else
     {
         for (i = 0; i < 6; i++)
         {
             this_mv.as_mv.row = br + hex[i].row;
             this_mv.as_mv.col = bc + hex[i].col;
             CHECK_POINT
             this_offset = base_offset + (this_mv.as_mv.row * in_what_stride) + this_mv.as_mv.col;
             thissad = vfp->sdf(what, what_stride, this_offset, in_what_stride, bestsad);
             CHECK_BETTER
         }
     }
     if (best_site == -1)
         goto cal_neighbors;
     else
     {
         br += hex[best_site].row;
         bc += hex[best_site].col;
         k = best_site;
     }
     for (j = 1; j < hex_range; j++)
     {
         best_site = -1;
         CHECK_BOUNDS(2)
         if(all_in)
         {
             for (i = 0; i < 3; i++)
             {
                 this_mv.as_mv.row = br + next_chkpts[k][i].row;
                 this_mv.as_mv.col = bc + next_chkpts[k][i].col;
                 this_offset = base_offset + (this_mv.as_mv.row * (in_what_stride)) + this_mv.as_mv.col;
                 thissad = vfp->sdf(what, what_stride, this_offset, in_what_stride, bestsad);
                 CHECK_BETTER
             }
         }else
         {
             for (i = 0; i < 3; i++)
             {
                 this_mv.as_mv.row = br + next_chkpts[k][i].row;
                 this_mv.as_mv.col = bc + next_chkpts[k][i].col;
                 CHECK_POINT
                 this_offset = base_offset + (this_mv.as_mv.row * (in_what_stride)) + this_mv.as_mv.col;
                 thissad = vfp->sdf(what, what_stride, this_offset, in_what_stride, bestsad);
                 CHECK_BETTER
             }
         }
         if (best_site == -1)
             break;
         else
         {
             br += next_chkpts[k][best_site].row;
             bc += next_chkpts[k][best_site].col;
             k += 5 + best_site;
             if (k >= 12) k -= 12;
             else if (k >= 6) k -= 6;
         }
     }
     /* check 4 1-away neighbors */
 cal_neighbors:
     for (j = 0; j < dia_range; j++)
     {
         best_site = -1;
         CHECK_BOUNDS(1)
         if(all_in)
         {
             for (i = 0; i < 4; i++)
             {
                 this_mv.as_mv.row = br + neighbors[i].row;
                 this_mv.as_mv.col = bc + neighbors[i].col;
                 this_offset = base_offset + (this_mv.as_mv.row * (in_what_stride)) + this_mv.as_mv.col;
                 thissad = vfp->sdf(what, what_stride, this_offset, in_what_stride, bestsad);
                 CHECK_BETTER
             }
         }else
         {
             for (i = 0; i < 4; i++)
             {
                 this_mv.as_mv.row = br + neighbors[i].row;
                 this_mv.as_mv.col = bc + neighbors[i].col;
                 CHECK_POINT
                 this_offset = base_offset + (this_mv.as_mv.row * (in_what_stride)) + this_mv.as_mv.col;
                 thissad = vfp->sdf(what, what_stride, this_offset, in_what_stride, bestsad);
                 CHECK_BETTER
             }
         }
         if (best_site == -1)
             break;
         else
         {
             br += neighbors[best_site].row;
             bc += neighbors[best_site].col;
         }
     }
     best_mv->as_mv.row = br;
     best_mv->as_mv.col = bc;
     return bestsad;
 }
 #undef CHECK_BOUNDS
 #undef CHECK_POINT
 #undef CHECK_BETTER
 int vp8_diamond_search_sad_c
 (
     MACROBLOCK *x,
     BLOCK *b,
     BLOCKD *d,
     int_mv *ref_mv,
     int_mv *best_mv,
     int search_param,
     int sad_per_bit,
     int *num00,
     vp8_variance_fn_ptr_t *fn_ptr,
     int *mvcost[2],
     int_mv *center_mv
 )
 {
     int i, j, step;
     unsigned char *what = (*(b->base_src) + b->src);
     int what_stride = b->src_stride;
     unsigned char *in_what;
     int pre_stride = x->e_mbd.pre.y_stride;
     unsigned char *base_pre = x->e_mbd.pre.y_buffer;
     int in_what_stride = pre_stride;
     unsigned char *best_address;
     int tot_steps;
     int_mv this_mv;
     unsigned int bestsad;
     unsigned int thissad;
     int best_site = 0;
     int last_site = 0;
     int ref_row;
     int ref_col;
     int this_row_offset;
     int this_col_offset;
     search_site *ss;
     unsigned char *check_here;
     int *mvsadcost[2];
     int_mv fcenter_mv;
     mvsadcost[0] = x->mvsadcost[0];
     mvsadcost[1] = x->mvsadcost[1];
     fcenter_mv.as_mv.row = center_mv->as_mv.row >> 3;
     fcenter_mv.as_mv.col = center_mv->as_mv.col >> 3;
     vp8_clamp_mv(ref_mv, x->mv_col_min, x->mv_col_max, x->mv_row_min, x->mv_row_max);
     ref_row = ref_mv->as_mv.row;
     ref_col = ref_mv->as_mv.col;
     *num00 = 0;
     best_mv->as_mv.row = ref_row;
     best_mv->as_mv.col = ref_col;
     /* Work out the start point for the search */
     in_what = (unsigned char *)(base_pre + d->offset + (ref_row * pre_stride) + ref_col);
     best_address = in_what;
     /* Check the starting position */
     bestsad = fn_ptr->sdf(what, what_stride, in_what, in_what_stride, UINT_MAX)
             + mvsad_err_cost(best_mv, &fcenter_mv, mvsadcost, sad_per_bit);
     /* search_param determines the length of the initial step and hence
      * the number of iterations 0 = initial step (MAX_FIRST_STEP) pel :
      * 1 = (MAX_FIRST_STEP/2) pel, 2 = (MAX_FIRST_STEP/4) pel... etc.
      */
     ss = &x->ss[search_param * x->searches_per_step];
     tot_steps = (x->ss_count / x->searches_per_step) - search_param;
     i = 1;
     for (step = 0; step < tot_steps ; step++)
     {
         for (j = 0 ; j < x->searches_per_step ; j++)
         {
             /* Trap illegal vectors */
             this_row_offset = best_mv->as_mv.row + ss[i].mv.row;
             this_col_offset = best_mv->as_mv.col + ss[i].mv.col;
             if ((this_col_offset > x->mv_col_min) && (this_col_offset < x->mv_col_max) &&
             (this_row_offset > x->mv_row_min) && (this_row_offset < x->mv_row_max))
             {
                 check_here = ss[i].offset + best_address;
                 thissad = fn_ptr->sdf(what, what_stride, check_here, in_what_stride, bestsad);
                 if (thissad < bestsad)
                 {
                     this_mv.as_mv.row = this_row_offset;
                     this_mv.as_mv.col = this_col_offset;
                     thissad += mvsad_err_cost(&this_mv, &fcenter_mv,
                                               mvsadcost, sad_per_bit);
                     if (thissad < bestsad)
                     {
                         bestsad = thissad;
                         best_site = i;
                     }
                 }
             }
             i++;
         }
         if (best_site != last_site)
         {
             best_mv->as_mv.row += ss[best_site].mv.row;
             best_mv->as_mv.col += ss[best_site].mv.col;
             best_address += ss[best_site].offset;
             last_site = best_site;
         }
         else if (best_address == in_what)
             (*num00)++;
     }
     this_mv.as_mv.row = best_mv->as_mv.row << 3;
     this_mv.as_mv.col = best_mv->as_mv.col << 3;
     return fn_ptr->vf(what, what_stride, best_address, in_what_stride, &thissad)
            + mv_err_cost(&this_mv, center_mv, mvcost, x->errorperbit);
 }
 int vp8_diamond_search_sadx4
 (
     MACROBLOCK *x,
     BLOCK *b,
     BLOCKD *d,
     int_mv *ref_mv,
     int_mv *best_mv,
     int search_param,
     int sad_per_bit,
     int *num00,
     vp8_variance_fn_ptr_t *fn_ptr,
     int *mvcost[2],
     int_mv *center_mv
 )
 {
     int i, j, step;
     unsigned char *what = (*(b->base_src) + b->src);
     int what_stride = b->src_stride;
     unsigned char *in_what;
     int pre_stride = x->e_mbd.pre.y_stride;
     unsigned char *base_pre = x->e_mbd.pre.y_buffer;
     int in_what_stride = pre_stride;
     unsigned char *best_address;
     int tot_steps;
     int_mv this_mv;
     unsigned int bestsad;
     unsigned int thissad;
     int best_site = 0;
     int last_site = 0;
     int ref_row;
     int ref_col;
     int this_row_offset;
     int this_col_offset;
     search_site *ss;
     unsigned char *check_here;
     int *mvsadcost[2];
     int_mv fcenter_mv;
     mvsadcost[0] = x->mvsadcost[0];
     mvsadcost[1] = x->mvsadcost[1];
     fcenter_mv.as_mv.row = center_mv->as_mv.row >> 3;
     fcenter_mv.as_mv.col = center_mv->as_mv.col >> 3;
     vp8_clamp_mv(ref_mv, x->mv_col_min, x->mv_col_max, x->mv_row_min, x->mv_row_max);
     ref_row = ref_mv->as_mv.row;
     ref_col = ref_mv->as_mv.col;
     *num00 = 0;
     best_mv->as_mv.row = ref_row;
     best_mv->as_mv.col = ref_col;
     /* Work out the start point for the search */
     in_what = (unsigned char *)(base_pre + d->offset + (ref_row * pre_stride) + ref_col);
     best_address = in_what;
     /* Check the starting position */
     bestsad = fn_ptr->sdf(what, what_stride, in_what, in_what_stride, UINT_MAX)
             + mvsad_err_cost(best_mv, &fcenter_mv, mvsadcost, sad_per_bit);
     /* search_param determines the length of the initial step and hence the
      * number of iterations 0 = initial step (MAX_FIRST_STEP) pel : 1 =
      * (MAX_FIRST_STEP/2) pel, 2 = (MAX_FIRST_STEP/4) pel... etc.
      */
     ss = &x->ss[search_param * x->searches_per_step];
     tot_steps = (x->ss_count / x->searches_per_step) - search_param;
     i = 1;
     for (step = 0; step < tot_steps ; step++)
     {
         int all_in = 1, t;
         /* To know if all neighbor points are within the bounds, 4 bounds
          * checking are enough instead of checking 4 bounds for each
          * points.
          */
         all_in &= ((best_mv->as_mv.row + ss[i].mv.row)> x->mv_row_min);
         all_in &= ((best_mv->as_mv.row + ss[i+1].mv.row) < x->mv_row_max);
         all_in &= ((best_mv->as_mv.col + ss[i+2].mv.col) > x->mv_col_min);
         all_in &= ((best_mv->as_mv.col + ss[i+3].mv.col) < x->mv_col_max);
         if (all_in)
         {
             unsigned int sad_array[4];
             for (j = 0 ; j < x->searches_per_step ; j += 4)
             {
                 const unsigned char *block_offset[4];
                 for (t = 0; t < 4; t++)
                     block_offset[t] = ss[i+t].offset + best_address;
                 fn_ptr->sdx4df(what, what_stride, block_offset, in_what_stride, sad_array);
                 for (t = 0; t < 4; t++, i++)
                 {
                     if (sad_array[t] < bestsad)
                     {
                         this_mv.as_mv.row = best_mv->as_mv.row + ss[i].mv.row;
                         this_mv.as_mv.col = best_mv->as_mv.col + ss[i].mv.col;
                         sad_array[t] += mvsad_err_cost(&this_mv, &fcenter_mv,
                                                        mvsadcost, sad_per_bit);
                         if (sad_array[t] < bestsad)
                         {
                             bestsad = sad_array[t];
                             best_site = i;
                         }
                     }
                 }
             }
         }
         else
         {
             for (j = 0 ; j < x->searches_per_step ; j++)
             {
                 /* Trap illegal vectors */
                 this_row_offset = best_mv->as_mv.row + ss[i].mv.row;
                 this_col_offset = best_mv->as_mv.col + ss[i].mv.col;
                 if ((this_col_offset > x->mv_col_min) && (this_col_offset < x->mv_col_max) &&
                 (this_row_offset > x->mv_row_min) && (this_row_offset < x->mv_row_max))
                 {
                     check_here = ss[i].offset + best_address;
                     thissad = fn_ptr->sdf(what, what_stride, check_here, in_what_stride, bestsad);
                     if (thissad < bestsad)
                     {
                         this_mv.as_mv.row = this_row_offset;
                         this_mv.as_mv.col = this_col_offset;
                         thissad += mvsad_err_cost(&this_mv, &fcenter_mv,
                                                   mvsadcost, sad_per_bit);
                         if (thissad < bestsad)
                         {
                             bestsad = thissad;
                             best_site = i;
                         }
                     }
                 }
                 i++;
             }
         }
         if (best_site != last_site)
         {
             best_mv->as_mv.row += ss[best_site].mv.row;
             best_mv->as_mv.col += ss[best_site].mv.col;
             best_address += ss[best_site].offset;
             last_site = best_site;
         }
         else if (best_address == in_what)
             (*num00)++;
     }
     this_mv.as_mv.row = best_mv->as_mv.row * 8;
     this_mv.as_mv.col = best_mv->as_mv.col * 8;
     return fn_ptr->vf(what, what_stride, best_address, in_what_stride, &thissad)
            + mv_err_cost(&this_mv, center_mv, mvcost, x->errorperbit);
 }
 int vp8_full_search_sad_c(MACROBLOCK *x, BLOCK *b, BLOCKD *d, int_mv *ref_mv,
                         int sad_per_bit, int distance,
                         vp8_variance_fn_ptr_t *fn_ptr, int *mvcost[2],
                         int_mv *center_mv)
 {
     unsigned char *what = (*(b->base_src) + b->src);
     int what_stride = b->src_stride;
     unsigned char *in_what;
     int pre_stride = x->e_mbd.pre.y_stride;
     unsigned char *base_pre = x->e_mbd.pre.y_buffer;
     int in_what_stride = pre_stride;
     int mv_stride = pre_stride;
     unsigned char *bestaddress;
     int_mv *best_mv = &d->bmi.mv;
     int_mv this_mv;
     unsigned int bestsad;
     unsigned int thissad;
     int r, c;
     unsigned char *check_here;
     int ref_row = ref_mv->as_mv.row;
     int ref_col = ref_mv->as_mv.col;
     int row_min = ref_row - distance;
     int row_max = ref_row + distance;
     int col_min = ref_col - distance;
     int col_max = ref_col + distance;
     int *mvsadcost[2];
     int_mv fcenter_mv;
     mvsadcost[0] = x->mvsadcost[0];
     mvsadcost[1] = x->mvsadcost[1];
     fcenter_mv.as_mv.row = center_mv->as_mv.row >> 3;
     fcenter_mv.as_mv.col = center_mv->as_mv.col >> 3;
     /* Work out the mid point for the search */
     in_what = base_pre + d->offset;
     bestaddress = in_what + (ref_row * pre_stride) + ref_col;
     best_mv->as_mv.row = ref_row;
     best_mv->as_mv.col = ref_col;
     /* Baseline value at the centre */
     bestsad = fn_ptr->sdf(what, what_stride, bestaddress,
                           in_what_stride, UINT_MAX)
             + mvsad_err_cost(best_mv, &fcenter_mv, mvsadcost, sad_per_bit);
     /* Apply further limits to prevent us looking using vectors that
      * stretch beyiond the UMV border
      */
     if (col_min < x->mv_col_min)
         col_min = x->mv_col_min;
     if (col_max > x->mv_col_max)
         col_max = x->mv_col_max;
     if (row_min < x->mv_row_min)
         row_min = x->mv_row_min;
     if (row_max > x->mv_row_max)
         row_max = x->mv_row_max;
     for (r = row_min; r < row_max ; r++)
     {
         this_mv.as_mv.row = r;
         check_here = r * mv_stride + in_what + col_min;
         for (c = col_min; c < col_max; c++)
         {
             thissad = fn_ptr->sdf(what, what_stride, check_here, in_what_stride, bestsad);
             this_mv.as_mv.col = c;
             thissad += mvsad_err_cost(&this_mv, &fcenter_mv,
                                       mvsadcost, sad_per_bit);
             if (thissad < bestsad)
             {
                 bestsad = thissad;
                 best_mv->as_mv.row = r;
                 best_mv->as_mv.col = c;
                 bestaddress = check_here;
             }
             check_here++;
         }
     }
     this_mv.as_mv.row = best_mv->as_mv.row << 3;
     this_mv.as_mv.col = best_mv->as_mv.col << 3;
     return fn_ptr->vf(what, what_stride, bestaddress, in_what_stride, &thissad)
            + mv_err_cost(&this_mv, center_mv, mvcost, x->errorperbit);
 }
 int vp8_full_search_sadx3(MACROBLOCK *x, BLOCK *b, BLOCKD *d, int_mv *ref_mv,
                           int sad_per_bit, int distance,
                           vp8_variance_fn_ptr_t *fn_ptr, int *mvcost[2],
                           int_mv *center_mv)
 {
     unsigned char *what = (*(b->base_src) + b->src);
     int what_stride = b->src_stride;
     unsigned char *in_what;
     int pre_stride = x->e_mbd.pre.y_stride;
     unsigned char *base_pre = x->e_mbd.pre.y_buffer;
     int in_what_stride = pre_stride;
     int mv_stride = pre_stride;
     unsigned char *bestaddress;
     int_mv *best_mv = &d->bmi.mv;
     int_mv this_mv;
     unsigned int bestsad;
     unsigned int thissad;
     int r, c;
     unsigned char *check_here;
     int ref_row = ref_mv->as_mv.row;
     int ref_col = ref_mv->as_mv.col;
     int row_min = ref_row - distance;
     int row_max = ref_row + distance;
     int col_min = ref_col - distance;
     int col_max = ref_col + distance;
     unsigned int sad_array[3];
     int *mvsadcost[2];
     int_mv fcenter_mv;
     mvsadcost[0] = x->mvsadcost[0];
     mvsadcost[1] = x->mvsadcost[1];
     fcenter_mv.as_mv.row = center_mv->as_mv.row >> 3;
     fcenter_mv.as_mv.col = center_mv->as_mv.col >> 3;
     /* Work out the mid point for the search */
     in_what = base_pre + d->offset;
     bestaddress = in_what + (ref_row * pre_stride) + ref_col;
     best_mv->as_mv.row = ref_row;
     best_mv->as_mv.col = ref_col;
     /* Baseline value at the centre */
     bestsad = fn_ptr->sdf(what, what_stride, bestaddress,
                           in_what_stride, UINT_MAX)
             + mvsad_err_cost(best_mv, &fcenter_mv, mvsadcost, sad_per_bit);
     /* Apply further limits to prevent us looking using vectors that stretch
      * beyond the UMV border
      */
     if (col_min < x->mv_col_min)
         col_min = x->mv_col_min;
     if (col_max > x->mv_col_max)
         col_max = x->mv_col_max;
     if (row_min < x->mv_row_min)
         row_min = x->mv_row_min;
     if (row_max > x->mv_row_max)
         row_max = x->mv_row_max;
     for (r = row_min; r < row_max ; r++)
     {
         this_mv.as_mv.row = r;
         check_here = r * mv_stride + in_what + col_min;
         c = col_min;
         while ((c + 2) < col_max)
         {
             int i;
             fn_ptr->sdx3f(what, what_stride, check_here, in_what_stride, sad_array);
             for (i = 0; i < 3; i++)
             {
                 thissad = sad_array[i];
                 if (thissad < bestsad)
                 {
                     this_mv.as_mv.col = c;
                     thissad += mvsad_err_cost(&this_mv, &fcenter_mv,
                                               mvsadcost, sad_per_bit);
                     if (thissad < bestsad)
                     {
                         bestsad = thissad;
                         best_mv->as_mv.row = r;
                         best_mv->as_mv.col = c;
                         bestaddress = check_here;
                     }
                 }
                 check_here++;
                 c++;
             }
         }
         while (c < col_max)
         {
             thissad = fn_ptr->sdf(what, what_stride, check_here, in_what_stride, bestsad);
             if (thissad < bestsad)
             {
                 this_mv.as_mv.col = c;
                 thissad += mvsad_err_cost(&this_mv, &fcenter_mv,
                                           mvsadcost, sad_per_bit);
                 if (thissad < bestsad)
                 {
                     bestsad = thissad;
                     best_mv->as_mv.row = r;
                     best_mv->as_mv.col = c;
                     bestaddress = check_here;
                 }
             }
             check_here ++;
             c ++;
         }
     }
     this_mv.as_mv.row = best_mv->as_mv.row << 3;
     this_mv.as_mv.col = best_mv->as_mv.col << 3;
     return fn_ptr->vf(what, what_stride, bestaddress, in_what_stride, &thissad)
            + mv_err_cost(&this_mv, center_mv, mvcost, x->errorperbit);
 }
 int vp8_full_search_sadx8(MACROBLOCK *x, BLOCK *b, BLOCKD *d, int_mv *ref_mv,
                           int sad_per_bit, int distance,
                           vp8_variance_fn_ptr_t *fn_ptr, int *mvcost[2],
                           int_mv *center_mv)
 {
     unsigned char *what = (*(b->base_src) + b->src);
     int what_stride = b->src_stride;
     int pre_stride = x->e_mbd.pre.y_stride;
     unsigned char *base_pre = x->e_mbd.pre.y_buffer;
     unsigned char *in_what;
     int in_what_stride = pre_stride;
     int mv_stride = pre_stride;
     unsigned char *bestaddress;
     int_mv *best_mv = &d->bmi.mv;
     int_mv this_mv;
     unsigned int bestsad;
     unsigned int thissad;
     int r, c;
     unsigned char *check_here;
     int ref_row = ref_mv->as_mv.row;
     int ref_col = ref_mv->as_mv.col;
     int row_min = ref_row - distance;
     int row_max = ref_row + distance;
     int col_min = ref_col - distance;
     int col_max = ref_col + distance;
     DECLARE_ALIGNED_ARRAY(16, unsigned short, sad_array8, 8);
     unsigned int sad_array[3];
     int *mvsadcost[2];
     int_mv fcenter_mv;
     mvsadcost[0] = x->mvsadcost[0];
     mvsadcost[1] = x->mvsadcost[1];
     fcenter_mv.as_mv.row = center_mv->as_mv.row >> 3;
     fcenter_mv.as_mv.col = center_mv->as_mv.col >> 3;
     /* Work out the mid point for the search */
     in_what = base_pre + d->offset;
     bestaddress = in_what + (ref_row * pre_stride) + ref_col;
     best_mv->as_mv.row = ref_row;
     best_mv->as_mv.col = ref_col;
     /* Baseline value at the centre */
     bestsad = fn_ptr->sdf(what, what_stride,
                           bestaddress, in_what_stride, UINT_MAX)
             + mvsad_err_cost(best_mv, &fcenter_mv, mvsadcost, sad_per_bit);
     /* Apply further limits to prevent us looking using vectors that stretch
      * beyond the UMV border
      */
     if (col_min < x->mv_col_min)
         col_min = x->mv_col_min;
     if (col_max > x->mv_col_max)
         col_max = x->mv_col_max;
     if (row_min < x->mv_row_min)
         row_min = x->mv_row_min;
     if (row_max > x->mv_row_max)
         row_max = x->mv_row_max;
     for (r = row_min; r < row_max ; r++)
     {
         this_mv.as_mv.row = r;
         check_here = r * mv_stride + in_what + col_min;
         c = col_min;
         while ((c + 7) < col_max)
         {
             int i;
             fn_ptr->sdx8f(what, what_stride, check_here, in_what_stride, sad_array8);
             for (i = 0; i < 8; i++)
             {
                 thissad = sad_array8[i];
                 if (thissad < bestsad)
                 {
                     this_mv.as_mv.col = c;
                     thissad += mvsad_err_cost(&this_mv, &fcenter_mv,
                                               mvsadcost, sad_per_bit);
                     if (thissad < bestsad)
                     {
                         bestsad = thissad;
                         best_mv->as_mv.row = r;
                         best_mv->as_mv.col = c;
                         bestaddress = check_here;
                     }
                 }
                 check_here++;
                 c++;
             }
         }
         while ((c + 2) < col_max)
         {
             int i;
             fn_ptr->sdx3f(what, what_stride, check_here , in_what_stride, sad_array);
             for (i = 0; i < 3; i++)
             {
                 thissad = sad_array[i];
                 if (thissad < bestsad)
                 {
                     this_mv.as_mv.col = c;
                     thissad  += mvsad_err_cost(&this_mv, &fcenter_mv,
                         mvsadcost, sad_per_bit);
                     if (thissad < bestsad)
                     {
                         bestsad = thissad;
                         best_mv->as_mv.row = r;
                         best_mv->as_mv.col = c;
                         bestaddress = check_here;
                     }
                 }
                 check_here++;
                 c++;
             }
         }
         while (c < col_max)
         {
             thissad = fn_ptr->sdf(what, what_stride, check_here , in_what_stride, bestsad);
             if (thissad < bestsad)
             {
                 this_mv.as_mv.col = c;
                 thissad  += mvsad_err_cost(&this_mv, &fcenter_mv,
                     mvsadcost, sad_per_bit);
                 if (thissad < bestsad)
                 {
                     bestsad = thissad;
                     best_mv->as_mv.row = r;
                     best_mv->as_mv.col = c;
                     bestaddress = check_here;
                 }
             }
             check_here ++;
             c ++;
         }
     }
     this_mv.as_mv.row = best_mv->as_mv.row * 8;
     this_mv.as_mv.col = best_mv->as_mv.col * 8;
     return fn_ptr->vf(what, what_stride, bestaddress, in_what_stride, &thissad)
            + mv_err_cost(&this_mv, center_mv, mvcost, x->errorperbit);
 }
 int vp8_refining_search_sad_c(MACROBLOCK *x, BLOCK *b, BLOCKD *d, int_mv *ref_mv,
                             int error_per_bit, int search_range,
                             vp8_variance_fn_ptr_t *fn_ptr, int *mvcost[2],
                             int_mv *center_mv)
 {
     MV neighbors[4] = {{-1, 0}, {0, -1}, {0, 1}, {1, 0}};
     int i, j;
     short this_row_offset, this_col_offset;
     int what_stride = b->src_stride;
     int pre_stride = x->e_mbd.pre.y_stride;
     unsigned char *base_pre = x->e_mbd.pre.y_buffer;
     int in_what_stride = pre_stride;
     unsigned char *what = (*(b->base_src) + b->src);
     unsigned char *best_address = (unsigned char *)(base_pre + d->offset +
         (ref_mv->as_mv.row * pre_stride) + ref_mv->as_mv.col);
     unsigned char *check_here;
     int_mv this_mv;
     unsigned int bestsad;
     unsigned int thissad;
     int *mvsadcost[2];
     int_mv fcenter_mv;
     mvsadcost[0] = x->mvsadcost[0];
     mvsadcost[1] = x->mvsadcost[1];
     fcenter_mv.as_mv.row = center_mv->as_mv.row >> 3;
     fcenter_mv.as_mv.col = center_mv->as_mv.col >> 3;
     bestsad = fn_ptr->sdf(what, what_stride, best_address,
                           in_what_stride, UINT_MAX)
             + mvsad_err_cost(ref_mv, &fcenter_mv, mvsadcost, error_per_bit);
     for (i=0; i<search_range; i++)
     {
         int best_site = -1;
         for (j = 0 ; j < 4 ; j++)
         {
             this_row_offset = ref_mv->as_mv.row + neighbors[j].row;
             this_col_offset = ref_mv->as_mv.col + neighbors[j].col;
             if ((this_col_offset > x->mv_col_min) && (this_col_offset < x->mv_col_max) &&
             (this_row_offset > x->mv_row_min) && (this_row_offset < x->mv_row_max))
             {
                 check_here = (neighbors[j].row)*in_what_stride + neighbors[j].col + best_address;
                 thissad = fn_ptr->sdf(what, what_stride, check_here , in_what_stride, bestsad);
                 if (thissad < bestsad)
                 {
                     this_mv.as_mv.row = this_row_offset;
                     this_mv.as_mv.col = this_col_offset;
                     thissad += mvsad_err_cost(&this_mv, &fcenter_mv, mvsadcost, error_per_bit);
                     if (thissad < bestsad)
                     {
                         bestsad = thissad;
                         best_site = j;
                     }
                 }
             }
         }
         if (best_site == -1)
             break;
         else
         {
             ref_mv->as_mv.row += neighbors[best_site].row;
             ref_mv->as_mv.col += neighbors[best_site].col;
             best_address += (neighbors[best_site].row)*in_what_stride + neighbors[best_site].col;
         }
     }
     this_mv.as_mv.row = ref_mv->as_mv.row << 3;
     this_mv.as_mv.col = ref_mv->as_mv.col << 3;
     return fn_ptr->vf(what, what_stride, best_address, in_what_stride, &thissad)
            + mv_err_cost(&this_mv, center_mv, mvcost, x->errorperbit);
 }
 int vp8_refining_search_sadx4(MACROBLOCK *x, BLOCK *b, BLOCKD *d,
                               int_mv *ref_mv, int error_per_bit,
                               int search_range, vp8_variance_fn_ptr_t *fn_ptr,
                               int *mvcost[2], int_mv *center_mv)
 {
     MV neighbors[4] = {{-1, 0}, {0, -1}, {0, 1}, {1, 0}};
     int i, j;
     short this_row_offset, this_col_offset;
     int what_stride = b->src_stride;
     int pre_stride = x->e_mbd.pre.y_stride;
     unsigned char *base_pre = x->e_mbd.pre.y_buffer;
     int in_what_stride = pre_stride;
     unsigned char *what = (*(b->base_src) + b->src);
     unsigned char *best_address = (unsigned char *)(base_pre + d->offset +
         (ref_mv->as_mv.row * pre_stride) + ref_mv->as_mv.col);
     unsigned char *check_here;
     int_mv this_mv;
     unsigned int bestsad;
     unsigned int thissad;
     int *mvsadcost[2];
     int_mv fcenter_mv;
     mvsadcost[0] = x->mvsadcost[0];
     mvsadcost[1] = x->mvsadcost[1];
     fcenter_mv.as_mv.row = center_mv->as_mv.row >> 3;
     fcenter_mv.as_mv.col = center_mv->as_mv.col >> 3;
     bestsad = fn_ptr->sdf(what, what_stride, best_address,
                           in_what_stride, UINT_MAX)
             + mvsad_err_cost(ref_mv, &fcenter_mv, mvsadcost, error_per_bit);
     for (i=0; i<search_range; i++)
     {
         int best_site = -1;
         int all_in = 1;
         all_in &= ((ref_mv->as_mv.row - 1) > x->mv_row_min);
         all_in &= ((ref_mv->as_mv.row + 1) < x->mv_row_max);
         all_in &= ((ref_mv->as_mv.col - 1) > x->mv_col_min);
         all_in &= ((ref_mv->as_mv.col + 1) < x->mv_col_max);
         if(all_in)
         {
             unsigned int sad_array[4];
             const unsigned char *block_offset[4];
             block_offset[0] = best_address - in_what_stride;
             block_offset[1] = best_address - 1;
             block_offset[2] = best_address + 1;
             block_offset[3] = best_address + in_what_stride;
             fn_ptr->sdx4df(what, what_stride, block_offset, in_what_stride, sad_array);
             for (j = 0; j < 4; j++)
             {
                 if (sad_array[j] < bestsad)
                 {
                     this_mv.as_mv.row = ref_mv->as_mv.row + neighbors[j].row;
                     this_mv.as_mv.col = ref_mv->as_mv.col + neighbors[j].col;
                     sad_array[j] += mvsad_err_cost(&this_mv, &fcenter_mv, mvsadcost, error_per_bit);
                     if (sad_array[j] < bestsad)
                     {
                         bestsad = sad_array[j];
                         best_site = j;
                     }
                 }
             }
         }
         else
         {
             for (j = 0 ; j < 4 ; j++)
             {
                 this_row_offset = ref_mv->as_mv.row + neighbors[j].row;
                 this_col_offset = ref_mv->as_mv.col + neighbors[j].col;
                 if ((this_col_offset > x->mv_col_min) && (this_col_offset < x->mv_col_max) &&
                 (this_row_offset > x->mv_row_min) && (this_row_offset < x->mv_row_max))
                 {
                     check_here = (neighbors[j].row)*in_what_stride + neighbors[j].col + best_address;
                     thissad = fn_ptr->sdf(what, what_stride, check_here , in_what_stride, bestsad);
                     if (thissad < bestsad)
                     {
                         this_mv.as_mv.row = this_row_offset;
                         this_mv.as_mv.col = this_col_offset;
                         thissad += mvsad_err_cost(&this_mv, &fcenter_mv, mvsadcost, error_per_bit);
                         if (thissad < bestsad)
                         {
                             bestsad = thissad;
                             best_site = j;
                         }
                     }
                 }
             }
         }
         if (best_site == -1)
             break;
         else
         {
             ref_mv->as_mv.row += neighbors[best_site].row;
             ref_mv->as_mv.col += neighbors[best_site].col;
             best_address += (neighbors[best_site].row)*in_what_stride + neighbors[best_site].col;
         }
     }
     this_mv.as_mv.row = ref_mv->as_mv.row * 8;
     this_mv.as_mv.col = ref_mv->as_mv.col * 8;
     return fn_ptr->vf(what, what_stride, best_address, in_what_stride, &thissad)
            + mv_err_cost(&this_mv, center_mv, mvcost, x->errorperbit);
 }
 #ifdef VP8_ENTROPY_STATS
 void print_mode_context(void)
 {
     FILE *f = fopen("modecont.c", "w");
     int i, j;
     fprintf(f, "#include \"entropy.h\"\n");
     fprintf(f, "const int vp8_mode_contexts[6][4] =\n");
     fprintf(f, "{\n");
     for (j = 0; j < 6; j++)
     {
         fprintf(f, "  { /* %d */\n", j);
         fprintf(f, "    ");
         for (i = 0; i < 4; i++)
         {
             int overal_prob;
             int this_prob;
             int count;
             /* Overall probs */
             count = mv_mode_cts[i][0] + mv_mode_cts[i][1];
             if (count)
                 overal_prob = 256 * mv_mode_cts[i][0] / count;
             else
                 overal_prob = 128;
             if (overal_prob == 0)
                 overal_prob = 1;
             /* context probs */
             count = mv_ref_ct[j][i][0] + mv_ref_ct[j][i][1];
             if (count)
                 this_prob = 256 * mv_ref_ct[j][i][0] / count;
             else
                 this_prob = 128;
             if (this_prob == 0)
                 this_prob = 1;
             fprintf(f, "%5d, ", this_prob);
         }
         fprintf(f, "  },\n");
     }
     fprintf(f, "};\n");
     fclose(f);
 }
 /* MV ref count VP8_ENTROPY_STATS stats code */
 #ifdef VP8_ENTROPY_STATS
 void init_mv_ref_counts()
 {
     vpx_memset(mv_ref_ct, 0, sizeof(mv_ref_ct));
     vpx_memset(mv_mode_cts, 0, sizeof(mv_mode_cts));
 }
 void accum_mv_refs(MB_PREDICTION_MODE m, const int ct[4])
 {
     if (m == ZEROMV)
     {
         ++mv_ref_ct [ct[0]] [0] [0];
         ++mv_mode_cts[0][0];
     }
     else
     {
         ++mv_ref_ct [ct[0]] [0] [1];
         ++mv_mode_cts[0][1];
         if (m == NEARESTMV)
         {
             ++mv_ref_ct [ct[1]] [1] [0];
             ++mv_mode_cts[1][0];
         }
         else
         {
             ++mv_ref_ct [ct[1]] [1] [1];
             ++mv_mode_cts[1][1];
             if (m == NEARMV)
             {
                 ++mv_ref_ct [ct[2]] [2] [0];
                 ++mv_mode_cts[2][0];
             }
             else
             {
                 ++mv_ref_ct [ct[2]] [2] [1];
                 ++mv_mode_cts[2][1];
                 if (m == NEWMV)
                 {
                     ++mv_ref_ct [ct[3]] [3] [0];
                     ++mv_mode_cts[3][0];
                 }
                 else
                 {
                     ++mv_ref_ct [ct[3]] [3] [1];
                     ++mv_mode_cts[3][1];
                 }
             }
         }
     }
 }
 #endif/* END MV ref count VP8_ENTROPY_STATS stats code */
 #endif

The Tor Browser / annotate

media/libvpx/vp8/encoder/mcomp.c@ac0c01689b40 (annotated)

media/libvpx/vp8/encoder/mcomp.c