1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
|
/*
* 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_ENCODER_TOKENIZE_H_
#define AOM_AV1_ENCODER_TOKENIZE_H_
#include "av1/common/entropy.h"
#include "av1/encoder/block.h"
#include "aom_dsp/bitwriter.h"
#ifdef __cplusplus
extern "C" {
#endif
// The token and color_ctx members of the TokenExtra structure are used
// to store the indices of color and color context of each pixel in
// case of palette mode.
// 1) token can take values in the range of [0, 7] as maximum number of possible
// colors is 8 (PALETTE_COLORS). Hence token requires 3 bits (unsigned).
// 2) The reserved field (1-bit) is positioned such that color_ctx occupies the
// most significant bits and token occupies the least significant bits of the
// byte. Thus accesses to token and color_ctx are optimal. If TokenExtra is
// defined as:
// typedef struct {
// int8_t color_ctx : 4;
// uint8_t token : 3;
// } TokenExtra;
// then read of color_ctx requires an extra left shift to facilitate sign
// extension and write of token requires an extra masking.
// 3) color_ctx can take 5 (PALETTE_COLOR_INDEX_CONTEXTS) valid values, i.e.,
// from 0 to 4. As per the current implementation it can take values in the
// range of [-1, 4]. Here -1 corresponds to invalid color index context and is
// used for default initialization. Hence color_ctx requires 4 bits (signed).
typedef struct {
uint8_t token : 3;
uint8_t reserved : 1;
int8_t color_ctx : 4;
} TokenExtra;
typedef struct {
TokenExtra *start;
unsigned int count;
} TokenList;
typedef struct {
// tile_tok[i][j] is a pointer to the buffer storing palette tokens of the ith
// tile row, jth tile column.
TokenExtra *tile_tok[MAX_TILE_ROWS][MAX_TILE_COLS];
// tplist[i][j][k] holds the start pointer of tile_tok[i][j] and the count of
// palette tokens for the kth superblock row of the ith tile row, jth tile
// column.
TokenList *tplist[MAX_TILE_ROWS][MAX_TILE_COLS];
} TokenInfo;
struct AV1_COMP;
struct ThreadData;
struct FRAME_COUNTS;
enum {
OUTPUT_ENABLED = 0,
DRY_RUN_NORMAL,
DRY_RUN_COSTCOEFFS,
} UENUM1BYTE(RUN_TYPE);
struct tokenize_b_args {
const struct AV1_COMP *cpi;
struct ThreadData *td;
int this_rate;
uint8_t allow_update_cdf;
RUN_TYPE dry_run;
};
// Note in all the tokenize functions rate if non NULL is incremented
// with the coefficient token cost only if dry_run = DRY_RUN_COSTCOEFS,
// otherwise rate is not incremented.
void av1_tokenize_sb_vartx(const struct AV1_COMP *cpi, struct ThreadData *td,
RUN_TYPE dry_run, BLOCK_SIZE bsize, int *rate,
uint8_t allow_update_cdf);
int av1_cost_color_map(const MACROBLOCK *const x, int plane, BLOCK_SIZE bsize,
TX_SIZE tx_size, COLOR_MAP_TYPE type);
void av1_tokenize_color_map(const MACROBLOCK *const x, int plane,
TokenExtra **t, BLOCK_SIZE bsize, TX_SIZE tx_size,
COLOR_MAP_TYPE type, int allow_update_cdf,
struct FRAME_COUNTS *counts);
static INLINE int av1_get_tx_eob(const struct segmentation *seg, int segment_id,
TX_SIZE tx_size) {
const int eob_max = av1_get_max_eob(tx_size);
return segfeature_active(seg, segment_id, SEG_LVL_SKIP) ? 0 : eob_max;
}
// Token buffer is only used for palette tokens.
static INLINE unsigned int get_token_alloc(int mb_rows, int mb_cols,
int sb_size_log2,
const int num_planes) {
// Calculate the maximum number of max superblocks in the image.
const int shift = sb_size_log2 - 4;
const int sb_size = 1 << sb_size_log2;
const int sb_size_square = sb_size * sb_size;
const int sb_rows = ALIGN_POWER_OF_TWO(mb_rows, shift) >> shift;
const int sb_cols = ALIGN_POWER_OF_TWO(mb_cols, shift) >> shift;
// One palette token for each pixel. There can be palettes on two planes.
const int sb_palette_toks = AOMMIN(2, num_planes) * sb_size_square;
return sb_rows * sb_cols * sb_palette_toks;
}
// Allocate memory for token related info.
static AOM_INLINE void alloc_token_info(AV1_COMMON *cm, TokenInfo *token_info) {
int mi_rows_aligned_to_sb =
ALIGN_POWER_OF_TWO(cm->mi_params.mi_rows, cm->seq_params->mib_size_log2);
int sb_rows = mi_rows_aligned_to_sb >> cm->seq_params->mib_size_log2;
const int num_planes = av1_num_planes(cm);
unsigned int tokens =
get_token_alloc(cm->mi_params.mb_rows, cm->mi_params.mb_cols,
MAX_SB_SIZE_LOG2, num_planes);
CHECK_MEM_ERROR(
cm, token_info->tile_tok[0][0],
(TokenExtra *)aom_calloc(tokens, sizeof(*token_info->tile_tok[0][0])));
CHECK_MEM_ERROR(
cm, token_info->tplist[0][0],
(TokenList *)aom_calloc(sb_rows * MAX_TILE_ROWS * MAX_TILE_COLS,
sizeof(*token_info->tplist[0][0])));
}
// Free memory from token related variables.
static AOM_INLINE void free_token_info(TokenInfo *token_info) {
aom_free(token_info->tile_tok[0][0]);
token_info->tile_tok[0][0] = NULL;
aom_free(token_info->tplist[0][0]);
token_info->tplist[0][0] = NULL;
}
#ifdef __cplusplus
} // extern "C"
#endif
#endif // AOM_AV1_ENCODER_TOKENIZE_H_
|
