Mercurial > hgrepos > Python2 > PyMuPDF
annotate mupdf-source/thirdparty/brotli/c/enc/state.h @ 46:7ee69f120f19 default tip
>>>>> tag v1.26.5+1 for changeset b74429b0f5c4
| author | Franz Glasner <fzglas.hg@dom66.de> |
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| date | Sat, 11 Oct 2025 17:17:30 +0200 |
| parents | b50eed0cc0ef |
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| rev | line source |
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1 /* Copyright 2022 Google Inc. All Rights Reserved. |
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2 |
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3 Distributed under MIT license. |
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4 See file LICENSE for detail or copy at https://opensource.org/licenses/MIT |
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5 */ |
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6 |
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7 /* Encoder state. */ |
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8 |
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9 #ifndef BROTLI_ENC_STATE_H_ |
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10 #define BROTLI_ENC_STATE_H_ |
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11 |
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12 #include <brotli/types.h> |
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13 |
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14 #include "command.h" |
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15 #include "compress_fragment.h" |
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16 #include "compress_fragment_two_pass.h" |
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17 #include "hash.h" |
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18 #include "memory.h" |
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19 #include "params.h" |
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20 #include "ringbuffer.h" |
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21 |
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22 typedef enum BrotliEncoderStreamState { |
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23 /* Default state. */ |
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24 BROTLI_STREAM_PROCESSING = 0, |
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25 /* Intermediate state; after next block is emitted, byte-padding should be |
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26 performed before getting back to default state. */ |
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27 BROTLI_STREAM_FLUSH_REQUESTED = 1, |
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28 /* Last metablock was produced; no more input is acceptable. */ |
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29 BROTLI_STREAM_FINISHED = 2, |
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30 /* Flushing compressed block and writing meta-data block header. */ |
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31 BROTLI_STREAM_METADATA_HEAD = 3, |
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32 /* Writing metadata block body. */ |
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33 BROTLI_STREAM_METADATA_BODY = 4 |
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34 } BrotliEncoderStreamState; |
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35 |
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36 typedef enum BrotliEncoderFlintState { |
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37 BROTLI_FLINT_NEEDS_2_BYTES = 2, |
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38 BROTLI_FLINT_NEEDS_1_BYTE = 1, |
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39 BROTLI_FLINT_WAITING_FOR_PROCESSING = 0, |
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40 BROTLI_FLINT_WAITING_FOR_FLUSHING = -1, |
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41 BROTLI_FLINT_DONE = -2 |
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42 } BrotliEncoderFlintState; |
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43 |
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44 typedef struct BrotliEncoderStateStruct { |
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45 BrotliEncoderParams params; |
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46 |
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47 MemoryManager memory_manager_; |
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48 |
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49 uint64_t input_pos_; |
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50 RingBuffer ringbuffer_; |
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51 size_t cmd_alloc_size_; |
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52 Command* commands_; |
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53 size_t num_commands_; |
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54 size_t num_literals_; |
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55 size_t last_insert_len_; |
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56 uint64_t last_flush_pos_; |
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57 uint64_t last_processed_pos_; |
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58 int dist_cache_[BROTLI_NUM_DISTANCE_SHORT_CODES]; |
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59 int saved_dist_cache_[4]; |
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60 uint16_t last_bytes_; |
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61 uint8_t last_bytes_bits_; |
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62 /* "Flint" is a tiny uncompressed block emitted before the continuation |
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63 block to unwire literal context from previous data. Despite being int8_t, |
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64 field is actually BrotliEncoderFlintState enum. */ |
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65 int8_t flint_; |
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66 uint8_t prev_byte_; |
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67 uint8_t prev_byte2_; |
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68 size_t storage_size_; |
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69 uint8_t* storage_; |
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70 |
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71 Hasher hasher_; |
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72 |
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73 /* Hash table for FAST_ONE_PASS_COMPRESSION_QUALITY mode. */ |
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74 int small_table_[1 << 10]; /* 4KiB */ |
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75 int* large_table_; /* Allocated only when needed */ |
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76 size_t large_table_size_; |
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77 |
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78 BrotliOnePassArena* one_pass_arena_; |
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79 BrotliTwoPassArena* two_pass_arena_; |
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80 |
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81 /* Command and literal buffers for FAST_TWO_PASS_COMPRESSION_QUALITY. */ |
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82 uint32_t* command_buf_; |
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83 uint8_t* literal_buf_; |
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84 |
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85 uint64_t total_in_; |
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86 uint8_t* next_out_; |
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87 size_t available_out_; |
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88 uint64_t total_out_; |
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89 /* Temporary buffer for padding flush bits or metadata block header / body. */ |
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90 union { |
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91 uint64_t u64[2]; |
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92 uint8_t u8[16]; |
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93 } tiny_buf_; |
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94 uint32_t remaining_metadata_bytes_; |
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95 BrotliEncoderStreamState stream_state_; |
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96 |
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97 BROTLI_BOOL is_last_block_emitted_; |
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98 BROTLI_BOOL is_initialized_; |
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99 } BrotliEncoderStateStruct; |
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100 |
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101 typedef struct BrotliEncoderStateStruct BrotliEncoderStateInternal; |
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102 #define BrotliEncoderState BrotliEncoderStateInternal |
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103 |
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104 #endif // BROTLI_ENC_STATE_H_ |
