Add 2x4 and 4x2 variance functions

Change-Id: Ic2fbc66e9212da32930c6a8ba1a749e3a37c5b9a

aom_dsp/aom_dsp_rtcd_defs.pl

@@ -1592,6 +1592,12 @@ specialize qw/aom_get4x4sse_cs neon msa/;
   add_proto qw/unsigned int/, "aom_variance2x2", "const uint8_t *src_ptr, int source_stride, const uint8_t *ref_ptr, int ref_stride, unsigned int *sse";
   specialize qw/aom_variance2x2/;
 
+  add_proto qw/unsigned int/, "aom_variance2x4", "const uint8_t *src_ptr, int source_stride, const uint8_t *ref_ptr, int ref_stride, unsigned int *sse";
+  specialize qw/aom_variance2x4/;
+
+  add_proto qw/unsigned int/, "aom_variance4x2", "const uint8_t *src_ptr, int source_stride, const uint8_t *ref_ptr, int ref_stride, unsigned int *sse";
+  specialize qw/aom_variance4x2/;
+
 foreach (@block_sizes) {
   ($w, $h) = @$_;
   add_proto qw/unsigned int/, "aom_variance${w}x${h}", "const uint8_t *src_ptr, int source_stride, const uint8_t *ref_ptr, int ref_stride, unsigned int *sse";

aom_dsp/variance.c

@@ -233,6 +233,8 @@ VARIANCES(8, 8)
 VARIANCES(8, 4)
 VARIANCES(4, 8)
 VARIANCES(4, 4)
+VARIANCES(4, 2)
+VARIANCES(2, 4)
 VARIANCES(2, 2)
 
 GET_VAR(16, 16)

av1/encoder/encoder.c

@@ -2298,6 +2298,8 @@ AV1_COMP *av1_create_compressor(AV1EncoderConfig *oxcf,
 
 #if CONFIG_CB4X4
   BFP(BLOCK_2X2, NULL, NULL, aom_variance2x2, NULL, NULL, NULL, NULL, NULL)
+  BFP(BLOCK_2X4, NULL, NULL, aom_variance2x4, NULL, NULL, NULL, NULL, NULL)
+  BFP(BLOCK_4X2, NULL, NULL, aom_variance4x2, NULL, NULL, NULL, NULL, NULL)
 #endif
 
 #if CONFIG_MOTION_VAR