Remove mi_grid_* structures.

mi_grid_* are arrays of pointer to pointer. They save the pointers that point
to the MIs in cm->mi. But they are unnecessary and complicated. The original
goal was to remove MODE_INFO_t copy. But with an extra MODE_INFO_t pointer
inside MODE_INFO_t, same goal could be achieved.

This commit totally removes the mi_grid_* structures. But there are still
many dummy MODE_INFO_t inside cm->mi which are a waste of memory. Next commit
will do on-demand MODE_INFO_t allocation in order to save these memories.

Change-Id: I3a05cf1610679fed26e0b2eadd315a9ae91afdd6

1 files changed, 6 insertions, 6 deletions

diff --git a/vp9/common/vp9_mvref_common.c b/vp9/common/vp9_mvref_common.c
index ab64d3036..a09afff01 100644
--- a/vp9/common/vp9_mvref_common.c
+++ b/vp9/common/vp9_mvref_common.c
@@ -21,9 +21,9 @@ static void find_mv_refs_idx(const VP9_COMMON *cm, const MACROBLOCKD *xd,
   const int *ref_sign_bias = cm->ref_frame_sign_bias;
   int i, refmv_count = 0;
   const MODE_INFO *prev_mi = !cm->error_resilient_mode && cm->prev_mi
-        ? cm->prev_mi_grid_visible[mi_row * xd->mi_stride + mi_col]
+        ? cm->prev_mi[mi_row * xd->mi_stride + mi_col].src_mi
         : NULL;
-  const MB_MODE_INFO *const prev_mbmi = prev_mi ? &prev_mi->mbmi : NULL;
+  const MB_MODE_INFO *const prev_mbmi = prev_mi ? &prev_mi->src_mi->mbmi : NULL;
 
 
   const POSITION *const mv_ref_search = mv_ref_blocks[mi->mbmi.sb_type];
@@ -41,7 +41,7 @@ static void find_mv_refs_idx(const VP9_COMMON *cm, const MACROBLOCKD *xd,
     const POSITION *const mv_ref = &mv_ref_search[i];
     if (is_inside(tile, mi_col, mi_row, cm->mi_rows, mv_ref)) {
       const MODE_INFO *const candidate_mi = xd->mi[mv_ref->col + mv_ref->row *
-                                                   xd->mi_stride];
+                                                   xd->mi_stride].src_mi;
       const MB_MODE_INFO *const candidate = &candidate_mi->mbmi;
       // Keep counts for entropy encoding.
       context_counter += mode_2_counter[candidate->mode];
@@ -61,7 +61,7 @@ static void find_mv_refs_idx(const VP9_COMMON *cm, const MACROBLOCKD *xd,
     const POSITION *const mv_ref = &mv_ref_search[i];
     if (is_inside(tile, mi_col, mi_row, cm->mi_rows, mv_ref)) {
       const MB_MODE_INFO *const candidate = &xd->mi[mv_ref->col + mv_ref->row *
-                                                    xd->mi_stride]->mbmi;
+                                                    xd->mi_stride].src_mi->mbmi;
       different_ref_found = 1;
 
       if (candidate->ref_frame[0] == ref_frame)
@@ -87,7 +87,7 @@ static void find_mv_refs_idx(const VP9_COMMON *cm, const MACROBLOCKD *xd,
       const POSITION *mv_ref = &mv_ref_search[i];
       if (is_inside(tile, mi_col, mi_row, cm->mi_rows, mv_ref)) {
         const MB_MODE_INFO *const candidate = &xd->mi[mv_ref->col + mv_ref->row
-                                              * xd->mi_stride]->mbmi;
+                                              * xd->mi_stride].src_mi->mbmi;
 
         // If the candidate is INTRA we don't want to consider its mv.
         IF_DIFF_REF_FRAME_ADD_MV(candidate);
@@ -145,7 +145,7 @@ void vp9_append_sub8x8_mvs_for_idx(VP9_COMMON *cm, MACROBLOCKD *xd,
                                    int block, int ref, int mi_row, int mi_col,
                                    int_mv *nearest, int_mv *near) {
   int_mv mv_list[MAX_MV_REF_CANDIDATES];
-  MODE_INFO *const mi = xd->mi[0];
+  MODE_INFO *const mi = xd->mi[0].src_mi;
   b_mode_info *bmi = mi->bmi;
   int n;