shithub: libvpx

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Add a feature to reduce chrome intra mode search

Change-Id: I721ebdeef2b53ce3e5c3eba3f7462ae2103c95a8

--- a/vp9/encoder/vp9_onyx_if.c

+++ b/vp9/encoder/vp9_onyx_if.c

@@ -719,6 +719,7 @@

   sf->last_partitioning_redo_frequency = 4;

   sf->disable_splitmv = 0;

   sf->mode_search_skip_flags = 0;

+  sf->last_chroma_intra_mode = TM_PRED;

   // Skip any mode not chosen at size < X for all sizes > X

   // Hence BLOCK_SIZE_SB64X64 (skip is off)

@@ -746,6 +747,7 @@

       sf->auto_mv_step_size = 1;

       sf->use_avoid_tested_higherror = 1;

       sf->adaptive_rd_thresh = 1;

+      sf->last_chroma_intra_mode = TM_PRED;

       if (speed == 1) {

         sf->comp_inter_joint_search_thresh = BLOCK_SIZE_TYPES;

@@ -764,6 +766,7 @@

         sf->mode_search_skip_flags = FLAG_SKIP_INTRA_DIRMISMATCH |

                                      FLAG_SKIP_INTRA_BESTINTER |

                                      FLAG_SKIP_COMP_BESTINTRA;

+        sf->last_chroma_intra_mode = H_PRED;

       }

       if (speed == 2) {

         sf->adjust_thresholds_by_speed = 1;

@@ -786,6 +789,7 @@

                                      FLAG_SKIP_INTRA_BESTINTER |

                                      FLAG_SKIP_COMP_BESTINTRA |

                                      FLAG_SKIP_COMP_REFMISMATCH;

+        sf->last_chroma_intra_mode = DC_PRED;

       }

       if (speed == 3) {

         sf->comp_inter_joint_search_thresh = BLOCK_SIZE_TYPES;

--- a/vp9/encoder/vp9_onyx_int.h

+++ b/vp9/encoder/vp9_onyx_int.h

@@ -274,6 +274,7 @@

   // The heuristics selected are based on  flags

   // defined in the MODE_SEARCH_SKIP_HEURISTICS enum

   unsigned int mode_search_skip_flags;

+  MB_PREDICTION_MODE last_chroma_intra_mode;

 } SPEED_FEATURES;

 enum BlockSize {

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

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

@@ -1500,12 +1500,16 @@

                                        int64_t *distortion, int *skippable,

                                        BLOCK_SIZE_TYPE bsize) {

   MB_PREDICTION_MODE mode;

+  MB_PREDICTION_MODE last_mode;

   MB_PREDICTION_MODE UNINITIALIZED_IS_SAFE(mode_selected);

   int64_t best_rd = INT64_MAX, this_rd;

   int this_rate_tokenonly, this_rate, s;

   int64_t this_distortion;

-  for (mode = DC_PRED; mode <= TM_PRED; mode++) {

+  last_mode = bsize <= BLOCK_SIZE_SB8X8 ?

+              TM_PRED : cpi->sf.last_chroma_intra_mode;

+

+  for (mode = DC_PRED; mode <= last_mode; mode++) {

     x->e_mbd.mode_info_context->mbmi.uv_mode = mode;

     super_block_uvrd(&cpi->common, x, &this_rate_tokenonly,

                      &this_distortion, &s, NULL, bsize);