Import aom library

This is the reference implementation for the Alliance for Open Media's av1 video code.

The commit used was 4d668d7feb1f8abd809d1bca0418570a7f142a36.

third_party/aom/av1/common/tile_common.c

@@ -0,0 +1,125 @@
+/*
+ * Copyright (c) 2016, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+ */
+
+#include "av1/common/tile_common.h"
+#include "av1/common/onyxc_int.h"
+#include "aom_dsp/aom_dsp_common.h"
+
+void av1_tile_set_row(TileInfo *tile, const AV1_COMMON *cm, int row) {
+  tile->mi_row_start = row * cm->tile_height;
+  tile->mi_row_end = AOMMIN(tile->mi_row_start + cm->tile_height, cm->mi_rows);
+}
+
+void av1_tile_set_col(TileInfo *tile, const AV1_COMMON *cm, int col) {
+  tile->mi_col_start = col * cm->tile_width;
+  tile->mi_col_end = AOMMIN(tile->mi_col_start + cm->tile_width, cm->mi_cols);
+}
+
+#if CONFIG_DEPENDENT_HORZTILES && CONFIG_TILE_GROUPS
+void av1_tile_set_tg_boundary(TileInfo *tile, const AV1_COMMON *const cm,
+                              int row, int col) {
+  if (row < cm->tile_rows - 1) {
+    tile->tg_horz_boundary =
+        col >= cm->tile_group_start_col[row][col]
+            ? (row == cm->tile_group_start_row[row][col] ? 1 : 0)
+            : (row == cm->tile_group_start_row[row + 1][col] ? 1 : 0);
+  } else {
+    assert(col >= cm->tile_group_start_col[row][col]);
+    tile->tg_horz_boundary =
+        (row == cm->tile_group_start_row[row][col] ? 1 : 0);
+  }
+}
+#endif
+void av1_tile_init(TileInfo *tile, const AV1_COMMON *cm, int row, int col) {
+  av1_tile_set_row(tile, cm, row);
+  av1_tile_set_col(tile, cm, col);
+#if CONFIG_DEPENDENT_HORZTILES && CONFIG_TILE_GROUPS
+  av1_tile_set_tg_boundary(tile, cm, row, col);
+#endif
+}
+
+#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(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(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 av1_get_tile_n_bits(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
+
+void av1_update_boundary_info(const struct AV1Common *cm,
+                              const TileInfo *const tile_info, int mi_row,
+                              int mi_col) {
+  int row, col;
+  for (row = mi_row; row < (mi_row + cm->mib_size); row++)
+    for (col = mi_col; col < (mi_col + cm->mib_size); col++) {
+      MODE_INFO *const mi = cm->mi + row * cm->mi_stride + col;
+      mi->mbmi.boundary_info = 0;
+      if (cm->tile_cols * cm->tile_rows > 1) {
+#if CONFIG_DEPENDENT_HORZTILES
+        if (row == tile_info->mi_row_start &&
+            (!cm->dependent_horz_tiles || tile_info->tg_horz_boundary))
+#if CONFIG_TILE_GROUPS
+#else
+          if (row == tile_info->mi_row_start && !cm->dependent_horz_tiles)
+#endif  // CONFIG_TILE_GROUPS
+#else
+        if (row == tile_info->mi_row_start)
+#endif  // CONFIG_DEPENDENT_HORZTILES
+          mi->mbmi.boundary_info |= TILE_ABOVE_BOUNDARY;
+        if (col == tile_info->mi_col_start)
+          mi->mbmi.boundary_info |= TILE_LEFT_BOUNDARY;
+        if ((row + 1) >= tile_info->mi_row_end)
+          mi->mbmi.boundary_info |= TILE_BOTTOM_BOUNDARY;
+        if ((col + 1) >= tile_info->mi_col_end)
+          mi->mbmi.boundary_info |= TILE_RIGHT_BOUNDARY;
+      }
+      // Frame boundary is treated as tile boundary
+      if (row == 0)
+        mi->mbmi.boundary_info |= FRAME_ABOVE_BOUNDARY | TILE_ABOVE_BOUNDARY;
+      if (col == 0)
+        mi->mbmi.boundary_info |= FRAME_LEFT_BOUNDARY | TILE_LEFT_BOUNDARY;
+      if ((row + 1) >= cm->mi_rows)
+        mi->mbmi.boundary_info |= FRAME_BOTTOM_BOUNDARY | TILE_BOTTOM_BOUNDARY;
+      if ((col + 1) >= cm->mi_cols)
+        mi->mbmi.boundary_info |= FRAME_RIGHT_BOUNDARY | TILE_RIGHT_BOUNDARY;
+    }
+}
+
+#if CONFIG_LOOPFILTERING_ACROSS_TILES
+int av1_disable_loopfilter_on_tile_boundary(const struct AV1Common *cm) {
+  return (!cm->loop_filter_across_tiles_enabled &&
+          (cm->tile_cols * cm->tile_rows > 1));
+}
+#endif  // CONFIG_LOOPFILTERING_ACROSS_TILES