/*
 *  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 "vp10/common/tile_common.h"
#include "vp10/common/onyxc_int.h"
#include "vpx_dsp/vpx_dsp_common.h"

#define MIN_TILE_WIDTH_B64 4
#define MAX_TILE_WIDTH_B64 64

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
// TODO(geza.lore): CU_SIZE dependent.
static int get_min_log2_tile_cols(const int sb64_cols) {
  int min_log2 = 0;
  while ((MAX_TILE_WIDTH_B64 << min_log2) < sb64_cols)
    ++min_log2;
  return min_log2;
}

static int get_max_log2_tile_cols(const int sb64_cols) {
  int max_log2 = 1;
  while ((sb64_cols >> max_log2) >= MIN_TILE_WIDTH_B64)
    ++max_log2;
  return max_log2 - 1;
}

void vp10_get_tile_n_bits(int mi_cols,
                          int *min_log2_tile_cols, int *max_log2_tile_cols) {
  const int sb64_cols = mi_cols_aligned_to_sb(mi_cols) >> MAX_MIB_SIZE_LOG2;
  *min_log2_tile_cols = get_min_log2_tile_cols(sb64_cols);
  *max_log2_tile_cols = get_max_log2_tile_cols(sb64_cols);
  assert(*min_log2_tile_cols <= *max_log2_tile_cols);
}
#endif  // !CONFIG_EXT_TILE