1/* Copyright 2013 Google Inc. All Rights Reserved.
2
3 Distributed under MIT license.
4 See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
5*/
6
7/* Models the histograms of literals, commands and distance codes. */
8
9#ifndef BROTLI_ENC_HISTOGRAM_H_
10#define BROTLI_ENC_HISTOGRAM_H_
11
12#include <string.h> /* memset */
13
14#include "../common/constants.h"
15#include "../common/context.h"
16#include "../common/platform.h"
17#include <brotli/types.h>
18#include "./block_splitter.h"
19#include "./command.h"
20
21#if defined(__cplusplus) || defined(c_plusplus)
22extern "C" {
23#endif
24
25/* The distance symbols effectively used by "Large Window Brotli" (32-bit). */
26#define BROTLI_NUM_HISTOGRAM_DISTANCE_SYMBOLS 544
27
28#define FN(X) X ## Literal
29#define DATA_SIZE BROTLI_NUM_LITERAL_SYMBOLS
30#define DataType uint8_t
31#include "./histogram_inc.h" /* NOLINT(build/include) */
32#undef DataType
33#undef DATA_SIZE
34#undef FN
35
36#define FN(X) X ## Command
37#define DataType uint16_t
38#define DATA_SIZE BROTLI_NUM_COMMAND_SYMBOLS
39#include "./histogram_inc.h" /* NOLINT(build/include) */
40#undef DATA_SIZE
41#undef FN
42
43#define FN(X) X ## Distance
44#define DATA_SIZE BROTLI_NUM_HISTOGRAM_DISTANCE_SYMBOLS
45#include "./histogram_inc.h" /* NOLINT(build/include) */
46#undef DataType
47#undef DATA_SIZE
48#undef FN
49
50BROTLI_INTERNAL void BrotliBuildHistogramsWithContext(
51 const Command* cmds, const size_t num_commands,
52 const BlockSplit* literal_split, const BlockSplit* insert_and_copy_split,
53 const BlockSplit* dist_split, const uint8_t* ringbuffer, size_t pos,
54 size_t mask, uint8_t prev_byte, uint8_t prev_byte2,
55 const ContextType* context_modes, HistogramLiteral* literal_histograms,
56 HistogramCommand* insert_and_copy_histograms,
57 HistogramDistance* copy_dist_histograms);
58
59#if defined(__cplusplus) || defined(c_plusplus)
60} /* extern "C" */
61#endif
62
63#endif /* BROTLI_ENC_HISTOGRAM_H_ */
64