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Side by Side Diff: third_party/brotli/dec/state.h

Issue 1061993007: Update Brotli to revision ec03509 (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Created 5 years, 8 months ago
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1 /* Copyright 2015 Google Inc. All Rights Reserved. 1 /* Copyright 2015 Google Inc. All Rights Reserved.
2 2
3 Licensed under the Apache License, Version 2.0 (the "License"); 3 Licensed under the Apache License, Version 2.0 (the "License");
4 you may not use this file except in compliance with the License. 4 you may not use this file except in compliance with the License.
5 You may obtain a copy of the License at 5 You may obtain a copy of the License at
6 6
7 http://www.apache.org/licenses/LICENSE-2.0 7 http://www.apache.org/licenses/LICENSE-2.0
8 8
9 Unless required by applicable law or agreed to in writing, software 9 Unless required by applicable law or agreed to in writing, software
10 distributed under the License is distributed on an "AS IS" BASIS, 10 distributed under the License is distributed on an "AS IS" BASIS,
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32 BROTLI_STATE_UNINITED = 0, 32 BROTLI_STATE_UNINITED = 0,
33 BROTLI_STATE_BITREADER_WARMUP = 1, 33 BROTLI_STATE_BITREADER_WARMUP = 1,
34 BROTLI_STATE_METABLOCK_BEGIN = 10, 34 BROTLI_STATE_METABLOCK_BEGIN = 10,
35 BROTLI_STATE_METABLOCK_HEADER_1 = 11, 35 BROTLI_STATE_METABLOCK_HEADER_1 = 11,
36 BROTLI_STATE_METABLOCK_HEADER_2 = 12, 36 BROTLI_STATE_METABLOCK_HEADER_2 = 12,
37 BROTLI_STATE_BLOCK_BEGIN = 13, 37 BROTLI_STATE_BLOCK_BEGIN = 13,
38 BROTLI_STATE_BLOCK_INNER = 14, 38 BROTLI_STATE_BLOCK_INNER = 14,
39 BROTLI_STATE_BLOCK_DISTANCE = 15, 39 BROTLI_STATE_BLOCK_DISTANCE = 15,
40 BROTLI_STATE_BLOCK_POST = 16, 40 BROTLI_STATE_BLOCK_POST = 16,
41 BROTLI_STATE_UNCOMPRESSED = 17, 41 BROTLI_STATE_UNCOMPRESSED = 17,
42 BROTLI_STATE_METADATA = 18,
43 BROTLI_STATE_BLOCK_INNER_WRITE = 19,
42 BROTLI_STATE_METABLOCK_DONE = 20, 44 BROTLI_STATE_METABLOCK_DONE = 20,
45 BROTLI_STATE_BLOCK_POST_WRITE_1 = 21,
46 BROTLI_STATE_BLOCK_POST_WRITE_2 = 22,
47 BROTLI_STATE_BLOCK_POST_CONTINUE = 23,
43 BROTLI_STATE_HUFFMAN_CODE_0 = 30, 48 BROTLI_STATE_HUFFMAN_CODE_0 = 30,
44 BROTLI_STATE_HUFFMAN_CODE_1 = 31, 49 BROTLI_STATE_HUFFMAN_CODE_1 = 31,
45 BROTLI_STATE_HUFFMAN_CODE_2 = 32, 50 BROTLI_STATE_HUFFMAN_CODE_2 = 32,
46 BROTLI_STATE_CONTEXT_MAP_1 = 33, 51 BROTLI_STATE_CONTEXT_MAP_1 = 33,
47 BROTLI_STATE_CONTEXT_MAP_2 = 34, 52 BROTLI_STATE_CONTEXT_MAP_2 = 34,
48 BROTLI_STATE_TREE_GROUP = 35, 53 BROTLI_STATE_TREE_GROUP = 35,
49 BROTLI_STATE_SUB_NONE = 50, 54 BROTLI_STATE_SUB_NONE = 50,
50 BROTLI_STATE_SUB_UNCOMPRESSED_SHORT = 51, 55 BROTLI_STATE_SUB_UNCOMPRESSED_SHORT = 51,
51 BROTLI_STATE_SUB_UNCOMPRESSED_FILL = 52, 56 BROTLI_STATE_SUB_UNCOMPRESSED_FILL = 52,
52 BROTLI_STATE_SUB_UNCOMPRESSED_COPY = 53, 57 BROTLI_STATE_SUB_UNCOMPRESSED_COPY = 53,
53 BROTLI_STATE_SUB_UNCOMPRESSED_WARMUP = 54, 58 BROTLI_STATE_SUB_UNCOMPRESSED_WARMUP = 54,
59 BROTLI_STATE_SUB_UNCOMPRESSED_WRITE_1 = 55,
60 BROTLI_STATE_SUB_UNCOMPRESSED_WRITE_2 = 56,
61 BROTLI_STATE_SUB_UNCOMPRESSED_WRITE_3 = 57,
54 BROTLI_STATE_SUB_HUFFMAN_LENGTH_BEGIN = 60, 62 BROTLI_STATE_SUB_HUFFMAN_LENGTH_BEGIN = 60,
55 BROTLI_STATE_SUB_HUFFMAN_LENGTH_SYMBOLS = 61, 63 BROTLI_STATE_SUB_HUFFMAN_LENGTH_SYMBOLS = 61,
56 BROTLI_STATE_SUB_HUFFMAN_DONE = 62, 64 BROTLI_STATE_SUB_HUFFMAN_DONE = 62,
57 BROTLI_STATE_SUB_TREE_GROUP = 70, 65 BROTLI_STATE_SUB_TREE_GROUP = 70,
58 BROTLI_STATE_SUB_CONTEXT_MAP_HUFFMAN = 80, 66 BROTLI_STATE_SUB_CONTEXT_MAP_HUFFMAN = 80,
59 BROTLI_STATE_SUB_CONTEXT_MAPS = 81, 67 BROTLI_STATE_SUB_CONTEXT_MAPS = 81,
60 BROTLI_STATE_DONE = 100 68 BROTLI_STATE_DONE = 100
61 } BrotliRunningState; 69 } BrotliRunningState;
62 70
63 typedef struct { 71 typedef struct {
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84 HuffmanCode* block_type_trees; 92 HuffmanCode* block_type_trees;
85 HuffmanCode* block_len_trees; 93 HuffmanCode* block_len_trees;
86 BrotliBitReader br; 94 BrotliBitReader br;
87 /* This counter is reused for several disjoint loops. */ 95 /* This counter is reused for several disjoint loops. */
88 int loop_counter; 96 int loop_counter;
89 /* This is true if the literal context map histogram type always matches the 97 /* This is true if the literal context map histogram type always matches the
90 block type. It is then not needed to keep the context (faster decoding). */ 98 block type. It is then not needed to keep the context (faster decoding). */
91 int trivial_literal_context; 99 int trivial_literal_context;
92 100
93 int meta_block_remaining_len; 101 int meta_block_remaining_len;
102 int is_metadata;
94 int is_uncompressed; 103 int is_uncompressed;
95 int block_length[3]; 104 int block_length[3];
96 int block_type[3]; 105 int block_type[3];
97 int num_block_types[3]; 106 int num_block_types[3];
98 int block_type_rb[6]; 107 int block_type_rb[6];
99 int block_type_rb_index[3]; 108 int block_type_rb_index[3];
100 int distance_postfix_bits; 109 int distance_postfix_bits;
101 int num_direct_distance_codes; 110 int num_direct_distance_codes;
102 int distance_postfix_mask; 111 int distance_postfix_mask;
103 int num_distance_codes; 112 int num_distance_codes;
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124 int insert_length; 133 int insert_length;
125 int copy_length; 134 int copy_length;
126 int distance_code; 135 int distance_code;
127 int distance; 136 int distance;
128 const uint8_t* copy_src; 137 const uint8_t* copy_src;
129 uint8_t* copy_dst; 138 uint8_t* copy_dst;
130 139
131 /* For CopyUncompressedBlockToOutput */ 140 /* For CopyUncompressedBlockToOutput */
132 int nbytes; 141 int nbytes;
133 142
143 /* For partial write operations */
144 int partially_written;
145
134 /* For HuffmanTreeGroupDecode */ 146 /* For HuffmanTreeGroupDecode */
135 int htrees_decoded; 147 int htrees_decoded;
136 148
137 /* For ReadHuffmanCodeLengths */ 149 /* For ReadHuffmanCodeLengths */
138 int symbol; 150 int symbol;
139 uint8_t prev_code_len; 151 uint8_t prev_code_len;
140 int repeat; 152 int repeat;
141 uint8_t repeat_code_len; 153 uint8_t repeat_code_len;
142 int space; 154 int space;
143 HuffmanCode table[32]; 155 HuffmanCode table[32];
(...skipping 14 matching lines...) Expand all
158 } BrotliState; 170 } BrotliState;
159 171
160 void BrotliStateInit(BrotliState* s); 172 void BrotliStateInit(BrotliState* s);
161 void BrotliStateCleanup(BrotliState* s); 173 void BrotliStateCleanup(BrotliState* s);
162 174
163 #if defined(__cplusplus) || defined(c_plusplus) 175 #if defined(__cplusplus) || defined(c_plusplus)
164 } /* extern "C" */ 176 } /* extern "C" */
165 #endif 177 #endif
166 178
167 #endif /* BROTLI_DEC_STATE_H_ */ 179 #endif /* BROTLI_DEC_STATE_H_ */
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