chromium/third_party/libaom/source/libaom/av1/common/entropymode.h

/*
 * 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.
 */

#ifndef AOM_AV1_COMMON_ENTROPYMODE_H_
#define AOM_AV1_COMMON_ENTROPYMODE_H_

#include "aom_ports/bitops.h"
#include "av1/common/entropy.h"
#include "av1/common/entropymv.h"
#include "av1/common/filter.h"
#include "av1/common/seg_common.h"

#ifdef __cplusplus
extern "C" {
#endif

#define BLOCK_SIZE_GROUPS …

#define TX_SIZE_CONTEXTS …

#define INTER_OFFSET(mode) …
#define INTER_COMPOUND_OFFSET(mode) …

// Number of possible contexts for a color index.
// As can be seen from av1_get_palette_color_index_context(), the possible
// contexts are (2,0,0), (2,2,1), (3,2,0), (4,1,0), (5,0,0). These are mapped to
// a value from 0 to 4 using 'av1_palette_color_index_context_lookup' table.
#define PALETTE_COLOR_INDEX_CONTEXTS …

// Palette Y mode context for a block is determined by number of neighboring
// blocks (top and/or left) using a palette for Y plane. So, possible Y mode'
// context values are:
// 0 if neither left nor top block uses palette for Y plane,
// 1 if exactly one of left or top block uses palette for Y plane, and
// 2 if both left and top blocks use palette for Y plane.
#define PALETTE_Y_MODE_CONTEXTS …

// Palette UV mode context for a block is determined by whether this block uses
// palette for the Y plane. So, possible values are:
// 0 if this block doesn't use palette for Y plane.
// 1 if this block uses palette for Y plane (i.e. Y palette size > 0).
#define PALETTE_UV_MODE_CONTEXTS …

// Map the number of pixels in a block size to a context
//   64(BLOCK_8X8, BLOCK_4x16, BLOCK_16X4)  -> 0
//  128(BLOCK_8X16, BLOCK_16x8)             -> 1
//   ...
// 4096(BLOCK_64X64)                        -> 6
#define PALATTE_BSIZE_CTXS …

#define MAX_COLOR_CONTEXT_HASH …

#define NUM_PALETTE_NEIGHBORS …

#define KF_MODE_CONTEXTS …

struct AV1Common;

SCAN_ORDER;

FRAME_CONTEXT;

static const int av1_ext_tx_ind[EXT_TX_SET_TYPES][TX_TYPES] = …;

static const int av1_ext_tx_inv[EXT_TX_SET_TYPES][TX_TYPES] = …;

void av1_set_default_ref_deltas(int8_t *ref_deltas);
void av1_set_default_mode_deltas(int8_t *mode_deltas);
void av1_setup_frame_contexts(struct AV1Common *cm);
void av1_setup_past_independence(struct AV1Common *cm);

// Returns (int)ceil(log2(n)).
static inline int av1_ceil_log2(int n) { … }

// Returns the context for palette color index at row 'r' and column 'c',
// along with the 'color_order' of neighbors and the 'color_idx'.
// The 'color_map' is a 2D array with the given 'stride'.
int av1_get_palette_color_index_context(const uint8_t *color_map, int stride,
                                        int r, int c, int palette_size,
                                        uint8_t *color_order, int *color_idx);

extern const int
    av1_palette_color_index_context_lookup[MAX_COLOR_CONTEXT_HASH + 1];

#ifdef __cplusplus
}  // extern "C"
#endif

#endif  // AOM_AV1_COMMON_ENTROPYMODE_H_