LCOV - code coverage report
Current view: directory - media/libvpx/vp8/common - findnearmv.c (source / functions) Found Hit Coverage
Test: app.info Lines: 60 0 0.0 %
Date: 2012-06-02 Functions: 2 0 0.0 %

       1                 : /*
       2                 :  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
       3                 :  *
       4                 :  *  Use of this source code is governed by a BSD-style license
       5                 :  *  that can be found in the LICENSE file in the root of the source
       6                 :  *  tree. An additional intellectual property rights grant can be found
       7                 :  *  in the file PATENTS.  All contributing project authors may
       8                 :  *  be found in the AUTHORS file in the root of the source tree.
       9                 :  */
      10                 : 
      11                 : 
      12                 : #include "findnearmv.h"
      13                 : 
      14                 : const unsigned char vp8_mbsplit_offset[4][16] = {
      15                 :     { 0,  8,  0,  0,  0,  0,  0,  0,  0,  0,   0,  0,  0,  0,  0,  0},
      16                 :     { 0,  2,  0,  0,  0,  0,  0,  0,  0,  0,   0,  0,  0,  0,  0,  0},
      17                 :     { 0,  2,  8, 10,  0,  0,  0,  0,  0,  0,   0,  0,  0,  0,  0,  0},
      18                 :     { 0,  1,  2,  3,  4,  5,  6,  7,  8,  9,  10, 11, 12, 13, 14, 15}
      19                 : };
      20                 : 
      21                 : /* Predict motion vectors using those from already-decoded nearby blocks.
      22                 :    Note that we only consider one 4x4 subblock from each candidate 16x16
      23                 :    macroblock.   */
      24               0 : void vp8_find_near_mvs
      25                 : (
      26                 :     MACROBLOCKD *xd,
      27                 :     const MODE_INFO *here,
      28                 :     int_mv *nearest,
      29                 :     int_mv *nearby,
      30                 :     int_mv *best_mv,
      31                 :     int cnt[4],
      32                 :     int refframe,
      33                 :     int *ref_frame_sign_bias
      34                 : )
      35                 : {
      36               0 :     const MODE_INFO *above = here - xd->mode_info_stride;
      37               0 :     const MODE_INFO *left = here - 1;
      38               0 :     const MODE_INFO *aboveleft = above - 1;
      39                 :     int_mv            near_mvs[4];
      40               0 :     int_mv           *mv = near_mvs;
      41               0 :     int             *cntx = cnt;
      42                 :     enum {CNT_INTRA, CNT_NEAREST, CNT_NEAR, CNT_SPLITMV};
      43                 : 
      44                 :     /* Zero accumulators */
      45               0 :     mv[0].as_int = mv[1].as_int = mv[2].as_int = 0;
      46               0 :     cnt[0] = cnt[1] = cnt[2] = cnt[3] = 0;
      47                 : 
      48                 :     /* Process above */
      49               0 :     if (above->mbmi.ref_frame != INTRA_FRAME)
      50                 :     {
      51               0 :         if (above->mbmi.mv.as_int)
      52                 :         {
      53               0 :             (++mv)->as_int = above->mbmi.mv.as_int;
      54               0 :             mv_bias(ref_frame_sign_bias[above->mbmi.ref_frame], refframe, mv, ref_frame_sign_bias);
      55               0 :             ++cntx;
      56                 :         }
      57                 : 
      58               0 :         *cntx += 2;
      59                 :     }
      60                 : 
      61                 :     /* Process left */
      62               0 :     if (left->mbmi.ref_frame != INTRA_FRAME)
      63                 :     {
      64               0 :         if (left->mbmi.mv.as_int)
      65                 :         {
      66                 :             int_mv this_mv;
      67                 : 
      68               0 :             this_mv.as_int = left->mbmi.mv.as_int;
      69               0 :             mv_bias(ref_frame_sign_bias[left->mbmi.ref_frame], refframe, &this_mv, ref_frame_sign_bias);
      70                 : 
      71               0 :             if (this_mv.as_int != mv->as_int)
      72                 :             {
      73               0 :                 (++mv)->as_int = this_mv.as_int;
      74               0 :                 ++cntx;
      75                 :             }
      76                 : 
      77               0 :             *cntx += 2;
      78                 :         }
      79                 :         else
      80               0 :             cnt[CNT_INTRA] += 2;
      81                 :     }
      82                 : 
      83                 :     /* Process above left */
      84               0 :     if (aboveleft->mbmi.ref_frame != INTRA_FRAME)
      85                 :     {
      86               0 :         if (aboveleft->mbmi.mv.as_int)
      87                 :         {
      88                 :             int_mv this_mv;
      89                 : 
      90               0 :             this_mv.as_int = aboveleft->mbmi.mv.as_int;
      91               0 :             mv_bias(ref_frame_sign_bias[aboveleft->mbmi.ref_frame], refframe, &this_mv, ref_frame_sign_bias);
      92                 : 
      93               0 :             if (this_mv.as_int != mv->as_int)
      94                 :             {
      95               0 :                 (++mv)->as_int = this_mv.as_int;
      96               0 :                 ++cntx;
      97                 :             }
      98                 : 
      99               0 :             *cntx += 1;
     100                 :         }
     101                 :         else
     102               0 :             cnt[CNT_INTRA] += 1;
     103                 :     }
     104                 : 
     105                 :     /* If we have three distinct MV's ... */
     106               0 :     if (cnt[CNT_SPLITMV])
     107                 :     {
     108                 :         /* See if above-left MV can be merged with NEAREST */
     109               0 :         if (mv->as_int == near_mvs[CNT_NEAREST].as_int)
     110               0 :             cnt[CNT_NEAREST] += 1;
     111                 :     }
     112                 : 
     113               0 :     cnt[CNT_SPLITMV] = ((above->mbmi.mode == SPLITMV)
     114               0 :                         + (left->mbmi.mode == SPLITMV)) * 2
     115               0 :                        + (aboveleft->mbmi.mode == SPLITMV);
     116                 : 
     117                 :     /* Swap near and nearest if necessary */
     118               0 :     if (cnt[CNT_NEAR] > cnt[CNT_NEAREST])
     119                 :     {
     120                 :         int tmp;
     121               0 :         tmp = cnt[CNT_NEAREST];
     122               0 :         cnt[CNT_NEAREST] = cnt[CNT_NEAR];
     123               0 :         cnt[CNT_NEAR] = tmp;
     124               0 :         tmp = near_mvs[CNT_NEAREST].as_int;
     125               0 :         near_mvs[CNT_NEAREST].as_int = near_mvs[CNT_NEAR].as_int;
     126               0 :         near_mvs[CNT_NEAR].as_int = tmp;
     127                 :     }
     128                 : 
     129                 :     /* Use near_mvs[0] to store the "best" MV */
     130               0 :     if (cnt[CNT_NEAREST] >= cnt[CNT_INTRA])
     131               0 :         near_mvs[CNT_INTRA] = near_mvs[CNT_NEAREST];
     132                 : 
     133                 :     /* Set up return values */
     134               0 :     best_mv->as_int = near_mvs[0].as_int;
     135               0 :     nearest->as_int = near_mvs[CNT_NEAREST].as_int;
     136               0 :     nearby->as_int = near_mvs[CNT_NEAR].as_int;
     137                 : 
     138                 :     //TODO: move clamp outside findnearmv
     139               0 :     vp8_clamp_mv2(nearest, xd);
     140               0 :     vp8_clamp_mv2(nearby, xd);
     141               0 :     vp8_clamp_mv2(best_mv, xd);
     142               0 : }
     143                 : 
     144               0 : vp8_prob *vp8_mv_ref_probs(
     145                 :     vp8_prob p[VP8_MVREFS-1], const int near_mv_ref_ct[4]
     146                 : )
     147                 : {
     148               0 :     p[0] = vp8_mode_contexts [near_mv_ref_ct[0]] [0];
     149               0 :     p[1] = vp8_mode_contexts [near_mv_ref_ct[1]] [1];
     150               0 :     p[2] = vp8_mode_contexts [near_mv_ref_ct[2]] [2];
     151               0 :     p[3] = vp8_mode_contexts [near_mv_ref_ct[3]] [3];
     152                 :     /*p[3] = vp8_mode_contexts [near_mv_ref_ct[1] + near_mv_ref_ct[2] + near_mv_ref_ct[3]] [3];*/
     153               0 :     return p;
     154                 : }
     155                 : 

Generated by: LCOV version 1.7