Port folder renaming changes from AOM

Manually cherry-picked commits:
ceef058 libvpx->libaom part2
3d26d91 libvpx -> libaom
cfea7dd vp10/ -> av1/
3a8eff7 Fix a build issue for a test
bf4202e Rename vpx to aom

Change-Id: I1b0eb5a40796e3aaf41c58984b4229a439a597dc
diff --git a/av1/common/tile_common.c b/av1/common/tile_common.c
new file mode 100644
index 0000000..e79734e
--- /dev/null
+++ b/av1/common/tile_common.c
@@ -0,0 +1,60 @@
+/*
+ *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "av1/common/tile_common.h"
+#include "av1/common/onyxc_int.h"
+#include "aom_dsp/vpx_dsp_common.h"
+
+void vp10_tile_set_row(TileInfo *tile, const VP10_COMMON *cm, int row) {
+  tile->mi_row_start = row * cm->tile_height;
+  tile->mi_row_end = VPXMIN(tile->mi_row_start + cm->tile_height, cm->mi_rows);
+}
+
+void vp10_tile_set_col(TileInfo *tile, const VP10_COMMON *cm, int col) {
+  tile->mi_col_start = col * cm->tile_width;
+  tile->mi_col_end = VPXMIN(tile->mi_col_start + cm->tile_width, cm->mi_cols);
+}
+
+void vp10_tile_init(TileInfo *tile, const VP10_COMMON *cm, int row, int col) {
+  vp10_tile_set_row(tile, cm, row);
+  vp10_tile_set_col(tile, cm, col);
+}
+
+#if !CONFIG_EXT_TILE
+
+#if CONFIG_EXT_PARTITION
+#define MIN_TILE_WIDTH_MAX_SB 2
+#define MAX_TILE_WIDTH_MAX_SB 32
+#else
+#define MIN_TILE_WIDTH_MAX_SB 4
+#define MAX_TILE_WIDTH_MAX_SB 64
+#endif  // CONFIG_EXT_PARTITION
+
+static int get_min_log2_tile_cols(const int max_sb_cols) {
+  int min_log2 = 0;
+  while ((MAX_TILE_WIDTH_MAX_SB << min_log2) < max_sb_cols) ++min_log2;
+  return min_log2;
+}
+
+static int get_max_log2_tile_cols(const int max_sb_cols) {
+  int max_log2 = 1;
+  while ((max_sb_cols >> max_log2) >= MIN_TILE_WIDTH_MAX_SB) ++max_log2;
+  return max_log2 - 1;
+}
+
+void vp10_get_tile_n_bits(const int mi_cols, int *min_log2_tile_cols,
+                          int *max_log2_tile_cols) {
+  const int max_sb_cols =
+      ALIGN_POWER_OF_TWO(mi_cols, MAX_MIB_SIZE_LOG2) >> MAX_MIB_SIZE_LOG2;
+  *min_log2_tile_cols = get_min_log2_tile_cols(max_sb_cols);
+  *max_log2_tile_cols = get_max_log2_tile_cols(max_sb_cols);
+  assert(*min_log2_tile_cols <= *max_log2_tile_cols);
+}
+#endif  // !CONFIG_EXT_TILE