b7559258a4
Eliminating usage of mb-units, switching to mi-units. Adding ALIGN_POWER_OF_TWO macro. Change-Id: I2491c969f713207c062011878b57e4e531818607
68 lines
2.3 KiB
C
68 lines
2.3 KiB
C
/*
|
|
* 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 "vp9/common/vp9_tile_common.h"
|
|
|
|
#define MIN_TILE_WIDTH 256
|
|
#define MAX_TILE_WIDTH 4096
|
|
#define MIN_TILE_WIDTH_SBS (MIN_TILE_WIDTH >> 6)
|
|
#define MAX_TILE_WIDTH_SBS (MAX_TILE_WIDTH >> 6)
|
|
|
|
static int to_sbs(n_mis) {
|
|
return mi_cols_aligned_to_sb(n_mis) >> LOG2_MI_BLOCK_SIZE;
|
|
}
|
|
|
|
static void vp9_get_tile_offsets(VP9_COMMON *cm, int *min_tile_off,
|
|
int *max_tile_off, int tile_idx,
|
|
int log2_n_tiles, int n_mis) {
|
|
const int n_sbs = to_sbs(n_mis);
|
|
const int sb_off1 = (tile_idx * n_sbs) >> log2_n_tiles;
|
|
const int sb_off2 = ((tile_idx + 1) * n_sbs) >> log2_n_tiles;
|
|
|
|
*min_tile_off = MIN(sb_off1 << 3, n_mis);
|
|
*max_tile_off = MIN(sb_off2 << 3, n_mis);
|
|
}
|
|
|
|
void vp9_get_tile_col_offsets(VP9_COMMON *cm, int tile_col_idx) {
|
|
cm->cur_tile_col_idx = tile_col_idx;
|
|
vp9_get_tile_offsets(cm, &cm->cur_tile_mi_col_start,
|
|
&cm->cur_tile_mi_col_end, tile_col_idx,
|
|
cm->log2_tile_columns, cm->mi_cols);
|
|
}
|
|
|
|
void vp9_get_tile_row_offsets(VP9_COMMON *cm, int tile_row_idx) {
|
|
cm->cur_tile_row_idx = tile_row_idx;
|
|
vp9_get_tile_offsets(cm, &cm->cur_tile_mi_row_start,
|
|
&cm->cur_tile_mi_row_end, tile_row_idx,
|
|
cm->log2_tile_rows, cm->mi_rows);
|
|
}
|
|
|
|
|
|
void vp9_get_tile_n_bits(VP9_COMMON *cm, int *min_log2_n_tiles_ptr,
|
|
int *delta_log2_n_tiles) {
|
|
const int sb_cols = to_sbs(cm->mi_cols);
|
|
int min_log2_n_tiles, max_log2_n_tiles;
|
|
|
|
for (max_log2_n_tiles = 0;
|
|
(sb_cols >> max_log2_n_tiles) >= MIN_TILE_WIDTH_SBS;
|
|
max_log2_n_tiles++) {}
|
|
max_log2_n_tiles--;
|
|
if (max_log2_n_tiles < 0)
|
|
max_log2_n_tiles = 0;
|
|
|
|
for (min_log2_n_tiles = 0;
|
|
(MAX_TILE_WIDTH_SBS << min_log2_n_tiles) < sb_cols;
|
|
min_log2_n_tiles++) {}
|
|
|
|
assert(max_log2_n_tiles >= min_log2_n_tiles);
|
|
*min_log2_n_tiles_ptr = min_log2_n_tiles;
|
|
*delta_log2_n_tiles = max_log2_n_tiles - min_log2_n_tiles;
|
|
}
|