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
|
/*
* 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 <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "aom/aom_integer.h"
#include "av1/decoder/accounting.h"
static int accounting_hash(const char *str) {
uint32_t val;
const unsigned char *ustr;
val = 0;
ustr = (const unsigned char *)str;
/* This is about the worst hash one can design, but it should be good enough
here. */
while (*ustr) val += *ustr++;
return val % AOM_ACCOUNTING_HASH_SIZE;
}
/* Dictionary lookup based on an open-addressing hash table. */
int aom_accounting_dictionary_lookup(Accounting *accounting, const char *str) {
int hash;
size_t len;
AccountingDictionary *dictionary;
dictionary = &accounting->syms.dictionary;
hash = accounting_hash(str);
while (accounting->hash_dictionary[hash] != -1) {
if (strcmp(dictionary->strs[accounting->hash_dictionary[hash]], str) == 0) {
return accounting->hash_dictionary[hash];
}
hash++;
if (hash == AOM_ACCOUNTING_HASH_SIZE) hash = 0;
}
/* No match found. */
assert(dictionary->num_strs + 1 < MAX_SYMBOL_TYPES);
accounting->hash_dictionary[hash] = dictionary->num_strs;
len = strlen(str);
dictionary->strs[dictionary->num_strs] = malloc(len + 1);
if (!dictionary->strs[dictionary->num_strs]) abort();
snprintf(dictionary->strs[dictionary->num_strs], len + 1, "%s", str);
dictionary->num_strs++;
return dictionary->num_strs - 1;
}
void aom_accounting_init(Accounting *accounting) {
int i;
accounting->num_syms_allocated = 1000;
accounting->syms.syms =
malloc(sizeof(AccountingSymbol) * accounting->num_syms_allocated);
if (!accounting->syms.syms) abort();
accounting->syms.dictionary.num_strs = 0;
assert(AOM_ACCOUNTING_HASH_SIZE > 2 * MAX_SYMBOL_TYPES);
for (i = 0; i < AOM_ACCOUNTING_HASH_SIZE; i++)
accounting->hash_dictionary[i] = -1;
aom_accounting_reset(accounting);
}
void aom_accounting_reset(Accounting *accounting) {
accounting->syms.num_syms = 0;
accounting->syms.num_binary_syms = 0;
accounting->syms.num_multi_syms = 0;
accounting->context.x = -1;
accounting->context.y = -1;
accounting->last_tell_frac = 0;
}
void aom_accounting_clear(Accounting *accounting) {
int i;
AccountingDictionary *dictionary;
free(accounting->syms.syms);
dictionary = &accounting->syms.dictionary;
for (i = 0; i < dictionary->num_strs; i++) {
free(dictionary->strs[i]);
}
}
void aom_accounting_set_context(Accounting *accounting, int16_t x, int16_t y) {
accounting->context.x = x;
accounting->context.y = y;
}
void aom_accounting_record(Accounting *accounting, const char *str,
uint32_t bits) {
AccountingSymbol sym;
// Reuse previous symbol if it has the same context and symbol id.
if (accounting->syms.num_syms) {
AccountingSymbol *last_sym;
last_sym = &accounting->syms.syms[accounting->syms.num_syms - 1];
if (memcmp(&last_sym->context, &accounting->context,
sizeof(AccountingSymbolContext)) == 0) {
uint32_t id;
id = aom_accounting_dictionary_lookup(accounting, str);
if (id == last_sym->id) {
last_sym->bits += bits;
last_sym->samples++;
return;
}
}
}
sym.context = accounting->context;
sym.samples = 1;
sym.bits = bits;
sym.id = aom_accounting_dictionary_lookup(accounting, str);
assert(sym.id <= 255);
if (accounting->syms.num_syms == accounting->num_syms_allocated) {
accounting->num_syms_allocated *= 2;
accounting->syms.syms =
realloc(accounting->syms.syms,
sizeof(AccountingSymbol) * accounting->num_syms_allocated);
if (!accounting->syms.syms) abort();
}
accounting->syms.syms[accounting->syms.num_syms++] = sym;
}
void aom_accounting_dump(Accounting *accounting) {
int i;
AccountingSymbol *sym;
printf("\n----- Number of recorded syntax elements = %d -----\n",
accounting->syms.num_syms);
printf("----- Total number of symbol calls = %d (%d binary) -----\n",
accounting->syms.num_multi_syms + accounting->syms.num_binary_syms,
accounting->syms.num_binary_syms);
for (i = 0; i < accounting->syms.num_syms; i++) {
sym = &accounting->syms.syms[i];
printf("%s x: %d, y: %d bits: %f samples: %d\n",
accounting->syms.dictionary.strs[sym->id], sym->context.x,
sym->context.y, (float)sym->bits / 8.0, sym->samples);
}
}
|
