Remove SOURCE_VAR_BASED_PARTITION.

BUG=aomedia:526

Change-Id: I8271a3c18ac9fa53b6304eb5e2a07ba787b05724

av1/encoder/encodeframe.h

@@ -25,13 +25,6 @@ struct yv12_buffer_config;
 struct AV1_COMP;
 struct ThreadData;
 
-// Constants used in SOURCE_VAR_BASED_PARTITION
-#define VAR_HIST_MAX_BG_VAR 1000
-#define VAR_HIST_FACTOR 10
-#define VAR_HIST_BINS (VAR_HIST_MAX_BG_VAR / VAR_HIST_FACTOR + 1)
-#define VAR_HIST_LARGE_CUT_OFF 75
-#define VAR_HIST_SMALL_CUT_OFF 45
-
 void av1_setup_src_planes(struct macroblock *x,
                           const struct yv12_buffer_config *src, int mi_row,
                           int mi_col);

av1/encoder/encoder.c

@@ -490,10 +490,6 @@ static void dealloc_compressor_data(AV1_COMP *cpi) {
     aom_free(cpi->td.mb.palette_buffer);
 #endif  // CONFIG_PALETTE
 
-  if (cpi->source_diff_var != NULL) {
-    aom_free(cpi->source_diff_var);
-    cpi->source_diff_var = NULL;
-  }
 #if CONFIG_ANS
   aom_buf_ans_free(&cpi->buf_ans);
 #endif  // CONFIG_ANS
@@ -2521,12 +2517,6 @@ AV1_COMP *av1_create_compressor(AV1EncoderConfig *oxcf,
   av1_set_speed_features_framesize_independent(cpi);
   av1_set_speed_features_framesize_dependent(cpi);
 
-  // Allocate memory to store variances for a frame.
-  CHECK_MEM_ERROR(cm, cpi->source_diff_var,
-                  aom_calloc(cm->MBs, sizeof(*cpi->source_diff_var)));
-  cpi->source_var_thresh = 0;
-  cpi->frames_till_next_var_check = 0;
-
 #define BFP(BT, SDF, SDAF, VF, SVF, SVAF, SDX3F, SDX8F, SDX4DF) \
   cpi->fn_ptr[BT].sdf = SDF;                                    \
   cpi->fn_ptr[BT].sdaf = SDAF;                                  \

av1/encoder/encoder.h

@@ -538,12 +538,6 @@ typedef struct AV1_COMP {
                     // number of MBs in the current frame when the frame is
                     // scaled.
 
-  // Store frame variance info in SOURCE_VAR_BASED_PARTITION search type.
-  DIFF *source_diff_var;
-  // The threshold used in SOURCE_VAR_BASED_PARTITION search type.
-  unsigned int source_var_thresh;
-  int frames_till_next_var_check;
-
   int frame_flags;
 
   search_site_config ss_cfg;

av1/encoder/speed_features.h

@@ -199,10 +199,7 @@ typedef enum {
 
   // Use an arbitrary partitioning scheme based on source variance within
   // a 64X64 SB
-  VAR_BASED_PARTITION,
-
-  // Use non-fixed partitions based on source variance
-  SOURCE_VAR_BASED_PARTITION
+  VAR_BASED_PARTITION
 } PARTITION_SEARCH_TYPE;
 
 typedef enum {
@@ -439,7 +436,7 @@ typedef struct SPEED_FEATURES {
   // TODO(aconverse): Fold this into one of the other many mode skips
   BLOCK_SIZE max_intra_bsize;
 
-  // The frequency that we check if SOURCE_VAR_BASED_PARTITION or
+  // The frequency that we check if
   // FIXED_PARTITION search type should be used.
   int search_type_check_frequency;