Replace b_width_log2_lookup[] with direct block size access

Replace b_width_log2_lookup[] and b_height_log2_lookup[] computation
with direct block_size_wide/high[] access.

Change-Id: I3947085d2269309aada6f6e805e8d1c58c197316

av1/encoder/rdopt.c

@@ -460,8 +460,8 @@ static void get_energy_distribution_fine(const AV1_COMP *cpi, BLOCK_SIZE bsize,
                                          uint8_t *src, int src_stride,
                                          uint8_t *dst, int dst_stride,
                                          double *hordist, double *verdist) {
-  int bw = 4 << (b_width_log2_lookup[bsize]);
-  int bh = 4 << (b_height_log2_lookup[bsize]);
+  int bw = block_size_wide[bsize];
+  int bh = block_size_high[bsize];
   unsigned int esq[16] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
   unsigned int var[16];
   double total = 0;

test/denoiser_sse2_test.cc

@@ -82,8 +82,8 @@ TEST_P(AV1DenoiserTest, BitexactCheck) {
         motion_magnitude_random));
 
     // Test bitexactness.
-    for (int h = 0; h < (4 << b_height_log2_lookup[bs_]); ++h) {
-      for (int w = 0; w < (4 << b_width_log2_lookup[bs_]); ++w) {
+    for (int h = 0; h < block_size_high[bs_]; ++h) {
+      for (int w = 0; w < block_size_wide[bs_]; ++w) {
         EXPECT_EQ(avg_block_c[h * 64 + w], avg_block_sse2[h * 64 + w]);
       }
     }