shithub: libvpx

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Shrink size of mode_map in struct TileDataEnc

To reduce the memcpy() cycles in vp9_rd_pick_inter_mode_sb().
The maximum value of mode_map is (MAX_MODES - 1) = 29.

Change-Id: I5704bd66838ea0b075f0afb001f5cbebfd3f1602

--- a/vp9/encoder/vp9_encoder.h

+++ b/vp9/encoder/vp9_encoder.h

@@ -282,7 +282,7 @@

 typedef struct TileDataEnc {

   TileInfo tile_info;

   int thresh_freq_fact[BLOCK_SIZES][MAX_MODES];

-  int mode_map[BLOCK_SIZES][MAX_MODES];

+  int8_t mode_map[BLOCK_SIZES][MAX_MODES];

   FIRSTPASS_DATA fp_data;

   VP9RowMTSync row_mt_sync;

--- a/vp9/encoder/vp9_rdopt.c

+++ b/vp9/encoder/vp9_rdopt.c

@@ -3074,10 +3074,10 @@

   const int *const rd_threshes = rd_opt->threshes[segment_id][bsize];

   const int *const rd_thresh_freq_fact = tile_data->thresh_freq_fact[bsize];

   int64_t mode_threshold[MAX_MODES];

-  int *tile_mode_map = tile_data->mode_map[bsize];

-  int mode_map[MAX_MODES];  // Maintain mode_map information locally to avoid

-                            // lock mechanism involved with reads from

-                            // tile_mode_map

+  int8_t *tile_mode_map = tile_data->mode_map[bsize];

+  int8_t mode_map[MAX_MODES];  // Maintain mode_map information locally to avoid

+                               // lock mechanism involved with reads from

+                               // tile_mode_map

   const int mode_search_skip_flags = sf->mode_search_skip_flags;

   int64_t mask_filter = 0;

   int64_t filter_cache[SWITCHABLE_FILTER_CONTEXTS];