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Diffstat (limited to 'debian/vendor-h2o/deps/brotli/enc/brotli_bit_stream.h')
| -rw-r--r-- | debian/vendor-h2o/deps/brotli/enc/brotli_bit_stream.h | 175 |
1 files changed, 0 insertions, 175 deletions
diff --git a/debian/vendor-h2o/deps/brotli/enc/brotli_bit_stream.h b/debian/vendor-h2o/deps/brotli/enc/brotli_bit_stream.h deleted file mode 100644 index b05f1e2..0000000 --- a/debian/vendor-h2o/deps/brotli/enc/brotli_bit_stream.h +++ /dev/null @@ -1,175 +0,0 @@ -/* Copyright 2014 Google Inc. All Rights Reserved. - - Distributed under MIT license. - See file LICENSE for detail or copy at https://opensource.org/licenses/MIT -*/ - -// Functions to convert brotli-related data structures into the -// brotli bit stream. The functions here operate under -// assumption that there is enough space in the storage, i.e., there are -// no out-of-range checks anywhere. -// -// These functions do bit addressing into a byte array. The byte array -// is called "storage" and the index to the bit is called storage_ix -// in function arguments. - -#ifndef BROTLI_ENC_BROTLI_BIT_STREAM_H_ -#define BROTLI_ENC_BROTLI_BIT_STREAM_H_ - -#include <vector> - -#include "./metablock.h" -#include "./types.h" - -namespace brotli { - -// All Store functions here will use a storage_ix, which is always the bit -// position for the current storage. - -// Stores a number between 0 and 255. -void StoreVarLenUint8(size_t n, size_t* storage_ix, uint8_t* storage); - -// Stores the compressed meta-block header. -// REQUIRES: length > 0 -// REQUIRES: length <= (1 << 24) -void StoreCompressedMetaBlockHeader(bool final_block, - size_t length, - size_t* storage_ix, - uint8_t* storage); - -// Stores the uncompressed meta-block header. -// REQUIRES: length > 0 -// REQUIRES: length <= (1 << 24) -void StoreUncompressedMetaBlockHeader(size_t length, - size_t* storage_ix, - uint8_t* storage); - -// Stores a context map where the histogram type is always the block type. -void StoreTrivialContextMap(size_t num_types, - size_t context_bits, - size_t* storage_ix, - uint8_t* storage); - -void StoreHuffmanTreeOfHuffmanTreeToBitMask( - const int num_codes, - const uint8_t *code_length_bitdepth, - size_t *storage_ix, - uint8_t *storage); - -void StoreHuffmanTree(const uint8_t* depths, size_t num, - size_t *storage_ix, uint8_t *storage); - -// Builds a Huffman tree from histogram[0:length] into depth[0:length] and -// bits[0:length] and stores the encoded tree to the bit stream. -void BuildAndStoreHuffmanTree(const uint32_t *histogram, - const size_t length, - uint8_t* depth, - uint16_t* bits, - size_t* storage_ix, - uint8_t* storage); - -void BuildAndStoreHuffmanTreeFast(const uint32_t *histogram, - const size_t histogram_total, - const size_t max_bits, - uint8_t* depth, - uint16_t* bits, - size_t* storage_ix, - uint8_t* storage); - -// Encodes the given context map to the bit stream. The number of different -// histogram ids is given by num_clusters. -void EncodeContextMap(const std::vector<uint32_t>& context_map, - size_t num_clusters, - size_t* storage_ix, uint8_t* storage); - -// Data structure that stores everything that is needed to encode each block -// switch command. -struct BlockSplitCode { - std::vector<uint32_t> type_code; - std::vector<uint32_t> length_prefix; - std::vector<uint32_t> length_nextra; - std::vector<uint32_t> length_extra; - std::vector<uint8_t> type_depths; - std::vector<uint16_t> type_bits; - std::vector<uint8_t> length_depths; - std::vector<uint16_t> length_bits; -}; - -// Builds a BlockSplitCode data structure from the block split given by the -// vector of block types and block lengths and stores it to the bit stream. -void BuildAndStoreBlockSplitCode(const std::vector<uint8_t>& types, - const std::vector<uint32_t>& lengths, - const size_t num_types, - BlockSplitCode* code, - size_t* storage_ix, - uint8_t* storage); - -// Stores the block switch command with index block_ix to the bit stream. -void StoreBlockSwitch(const BlockSplitCode& code, - const size_t block_ix, - size_t* storage_ix, - uint8_t* storage); - -// REQUIRES: length > 0 -// REQUIRES: length <= (1 << 24) -void StoreMetaBlock(const uint8_t* input, - size_t start_pos, - size_t length, - size_t mask, - uint8_t prev_byte, - uint8_t prev_byte2, - bool final_block, - uint32_t num_direct_distance_codes, - uint32_t distance_postfix_bits, - ContextType literal_context_mode, - const brotli::Command *commands, - size_t n_commands, - const MetaBlockSplit& mb, - size_t *storage_ix, - uint8_t *storage); - -// Stores the meta-block without doing any block splitting, just collects -// one histogram per block category and uses that for entropy coding. -// REQUIRES: length > 0 -// REQUIRES: length <= (1 << 24) -void StoreMetaBlockTrivial(const uint8_t* input, - size_t start_pos, - size_t length, - size_t mask, - bool is_last, - const brotli::Command *commands, - size_t n_commands, - size_t *storage_ix, - uint8_t *storage); - -// Same as above, but uses static prefix codes for histograms with a only a few -// symbols, and uses static code length prefix codes for all other histograms. -// REQUIRES: length > 0 -// REQUIRES: length <= (1 << 24) -void StoreMetaBlockFast(const uint8_t* input, - size_t start_pos, - size_t length, - size_t mask, - bool is_last, - const brotli::Command *commands, - size_t n_commands, - size_t *storage_ix, - uint8_t *storage); - -// This is for storing uncompressed blocks (simple raw storage of -// bytes-as-bytes). -// REQUIRES: length > 0 -// REQUIRES: length <= (1 << 24) -void StoreUncompressedMetaBlock(bool final_block, - const uint8_t* input, - size_t position, size_t mask, - size_t len, - size_t* storage_ix, - uint8_t* storage); - -// Stores an empty metadata meta-block and syncs to a byte boundary. -void StoreSyncMetaBlock(size_t* storage_ix, uint8_t* storage); - -} // namespace brotli - -#endif // BROTLI_ENC_BROTLI_BIT_STREAM_H_ |