vp9: consistent 'log2' variable naming

lg2 -> log2

Change-Id: I0602ddff49e42c9c40c29c084d04b7592b9f8edf

vp9/common/vp9_blockd.h

@@ -615,11 +615,11 @@ static int txfrm_block_to_raster_block(MACROBLOCKD *xd,
                                        int ss_txfrm_size) {
   const int bwl = b_width_log2(bsize) - xd->plane[plane].subsampling_x;
   const int txwl = ss_txfrm_size / 2;
-  const int tx_cols_lg2 = bwl - txwl;
-  const int tx_cols = 1 << tx_cols_lg2;
+  const int tx_cols_log2 = bwl - txwl;
+  const int tx_cols = 1 << tx_cols_log2;
   const int raster_mb = block >> ss_txfrm_size;
   const int x = (raster_mb & (tx_cols - 1)) << (txwl);
-  const int y = raster_mb >> tx_cols_lg2 << (txwl);
+  const int y = raster_mb >> tx_cols_log2 << (txwl);
   return x + (y << bwl);
 }
 
@@ -630,11 +630,11 @@ static void txfrm_block_to_raster_xy(MACROBLOCKD *xd,
                                      int *x, int *y) {
   const int bwl = b_width_log2(bsize) - xd->plane[plane].subsampling_x;
   const int txwl = ss_txfrm_size / 2;
-  const int tx_cols_lg2 = bwl - txwl;
-  const int tx_cols = 1 << tx_cols_lg2;
+  const int tx_cols_log2 = bwl - txwl;
+  const int tx_cols = 1 << tx_cols_log2;
   const int raster_mb = block >> ss_txfrm_size;
   *x = (raster_mb & (tx_cols - 1)) << (txwl);
-  *y = raster_mb >> tx_cols_lg2 << (txwl);
+  *y = raster_mb >> tx_cols_log2 << (txwl);
 }
 
 static void extend_for_intra(MACROBLOCKD* const xd, int plane, int block,

vp9/common/vp9_onyxc_int.h

@@ -28,7 +28,7 @@
 
 // Define the number of candidate reference buffers.
 #define NUM_REF_FRAMES 8
-#define NUM_REF_FRAMES_LG2 3
+#define NUM_REF_FRAMES_LOG2 3
 
 #define ALLOWED_REFS_PER_FRAME 3
 
@@ -37,8 +37,8 @@
 // normal reference pool.
 #define NUM_YV12_BUFFERS (NUM_REF_FRAMES + 4)
 
-#define NUM_FRAME_CONTEXTS_LG2 2
-#define NUM_FRAME_CONTEXTS (1 << NUM_FRAME_CONTEXTS_LG2)
+#define NUM_FRAME_CONTEXTS_LOG2 2
+#define NUM_FRAME_CONTEXTS (1 << NUM_FRAME_CONTEXTS_LOG2)
 
 #define MAX_LAG_BUFFERS 25
 

vp9/decoder/vp9_decodframe.c

@@ -868,7 +868,7 @@ static size_t read_uncompressed_header(VP9D_COMP *pbi,
        pbi->refresh_frame_flags = vp9_rb_read_literal(rb, NUM_REF_FRAMES);
 
       for (i = 0; i < ALLOWED_REFS_PER_FRAME; ++i) {
-        const int ref = vp9_rb_read_literal(rb, NUM_REF_FRAMES_LG2);
+        const int ref = vp9_rb_read_literal(rb, NUM_REF_FRAMES_LOG2);
         cm->active_ref_idx[i] = cm->ref_frame_map[ref];
         cm->ref_frame_sign_bias[LAST_FRAME + i] = vp9_rb_read_bit(rb);
       }
@@ -893,7 +893,7 @@ static size_t read_uncompressed_header(VP9D_COMP *pbi,
     cm->frame_parallel_decoding_mode = 1;
   }
 
-  cm->frame_context_idx = vp9_rb_read_literal(rb, NUM_FRAME_CONTEXTS_LG2);
+  cm->frame_context_idx = vp9_rb_read_literal(rb, NUM_FRAME_CONTEXTS_LOG2);
 
   if (cm->frame_type == KEY_FRAME || cm->error_resilient_mode || cm->intra_only)
     vp9_setup_past_independence(cm, xd);

vp9/encoder/vp9_bitstream.c

@@ -1352,7 +1352,7 @@ static void write_uncompressed_header(VP9_COMP *cpi,
       int i;
       vp9_wb_write_literal(wb, get_refresh_mask(cpi), NUM_REF_FRAMES);
       for (i = 0; i < ALLOWED_REFS_PER_FRAME; ++i) {
-        vp9_wb_write_literal(wb, refs[i], NUM_REF_FRAMES_LG2);
+        vp9_wb_write_literal(wb, refs[i], NUM_REF_FRAMES_LOG2);
         vp9_wb_write_bit(wb, cm->ref_frame_sign_bias[LAST_FRAME + i]);
       }
 
@@ -1370,7 +1370,7 @@ static void write_uncompressed_header(VP9_COMP *cpi,
     vp9_wb_write_bit(wb, cm->frame_parallel_decoding_mode);
   }
 
-  vp9_wb_write_literal(wb, cm->frame_context_idx, NUM_FRAME_CONTEXTS_LG2);
+  vp9_wb_write_literal(wb, cm->frame_context_idx, NUM_FRAME_CONTEXTS_LOG2);
 
   encode_loopfilter(cm, xd, wb);
   encode_quantization(cm, wb);