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author | wolfbeast <mcwerewolf@wolfbeast.com> | 2019-11-14 09:07:29 +0100 |
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committer | wolfbeast <mcwerewolf@wolfbeast.com> | 2019-11-14 09:07:29 +0100 |
commit | 56de283899bc91f7110aba58a3ca174c10852683 (patch) | |
tree | 779e6501bbbe4f015509c423ab44f2f40ea97cc8 /modules/brotli/enc/compress_fragment.h | |
parent | ce0dd36a78814c59950fde6c19413c1f7ea85ee1 (diff) | |
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Issue #1288 - Part 1a: Update brotli to 1.0.7
This also reorganizes the exports in the build system to use `brotli/`
as include directory.
Diffstat (limited to 'modules/brotli/enc/compress_fragment.h')
-rw-r--r-- | modules/brotli/enc/compress_fragment.h | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/modules/brotli/enc/compress_fragment.h b/modules/brotli/enc/compress_fragment.h new file mode 100644 index 000000000..80007f5dc --- /dev/null +++ b/modules/brotli/enc/compress_fragment.h @@ -0,0 +1,61 @@ +/* Copyright 2015 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* Function for fast encoding of an input fragment, independently from the input + history. This function uses one-pass processing: when we find a backward + match, we immediately emit the corresponding command and literal codes to + the bit stream. */ + +#ifndef BROTLI_ENC_COMPRESS_FRAGMENT_H_ +#define BROTLI_ENC_COMPRESS_FRAGMENT_H_ + +#include "../common/platform.h" +#include <brotli/types.h> +#include "./memory.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +/* Compresses "input" string to the "*storage" buffer as one or more complete + meta-blocks, and updates the "*storage_ix" bit position. + + If "is_last" is 1, emits an additional empty last meta-block. + + "cmd_depth" and "cmd_bits" contain the command and distance prefix codes + (see comment in encode.h) used for the encoding of this input fragment. + If "is_last" is 0, they are updated to reflect the statistics + of this input fragment, to be used for the encoding of the next fragment. + + "*cmd_code_numbits" is the number of bits of the compressed representation + of the command and distance prefix codes, and "cmd_code" is an array of + at least "(*cmd_code_numbits + 7) >> 3" size that contains the compressed + command and distance prefix codes. If "is_last" is 0, these are also + updated to represent the updated "cmd_depth" and "cmd_bits". + + REQUIRES: "input_size" is greater than zero, or "is_last" is 1. + REQUIRES: "input_size" is less or equal to maximal metablock size (1 << 24). + REQUIRES: All elements in "table[0..table_size-1]" are initialized to zero. + REQUIRES: "table_size" is an odd (9, 11, 13, 15) power of two + OUTPUT: maximal copy distance <= |input_size| + OUTPUT: maximal copy distance <= BROTLI_MAX_BACKWARD_LIMIT(18) */ +BROTLI_INTERNAL void BrotliCompressFragmentFast(MemoryManager* m, + const uint8_t* input, + size_t input_size, + BROTLI_BOOL is_last, + int* table, size_t table_size, + uint8_t cmd_depth[128], + uint16_t cmd_bits[128], + size_t* cmd_code_numbits, + uint8_t* cmd_code, + size_t* storage_ix, + uint8_t* storage); + +#if defined(__cplusplus) || defined(c_plusplus) +} /* extern "C" */ +#endif + +#endif /* BROTLI_ENC_COMPRESS_FRAGMENT_H_ */ |