mirror of https://github.com/acidanthera/audk.git
108 lines
4.9 KiB
C
108 lines
4.9 KiB
C
/* 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 "../common/types.h"
|
|
#include "./command.h"
|
|
#include "./context.h"
|
|
#include "./entropy_encode.h"
|
|
#include "./memory.h"
|
|
#include "./metablock.h"
|
|
#include "./port.h"
|
|
|
|
#if defined(__cplusplus) || defined(c_plusplus)
|
|
extern "C" {
|
|
#endif
|
|
|
|
/* All Store functions here will use a storage_ix, which is always the bit
|
|
position for the current storage. */
|
|
|
|
BROTLI_INTERNAL void BrotliStoreHuffmanTree(const uint8_t* depths, size_t num,
|
|
HuffmanTree* tree, size_t *storage_ix, uint8_t *storage);
|
|
|
|
BROTLI_INTERNAL void BrotliBuildAndStoreHuffmanTreeFast(
|
|
MemoryManager* m, 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);
|
|
|
|
/* REQUIRES: length > 0 */
|
|
/* REQUIRES: length <= (1 << 24) */
|
|
BROTLI_INTERNAL void BrotliStoreMetaBlock(MemoryManager* m,
|
|
const uint8_t* input,
|
|
size_t start_pos,
|
|
size_t length,
|
|
size_t mask,
|
|
uint8_t prev_byte,
|
|
uint8_t prev_byte2,
|
|
BROTLI_BOOL is_final_block,
|
|
uint32_t num_direct_distance_codes,
|
|
uint32_t distance_postfix_bits,
|
|
ContextType literal_context_mode,
|
|
const 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) */
|
|
BROTLI_INTERNAL void BrotliStoreMetaBlockTrivial(MemoryManager* m,
|
|
const uint8_t* input,
|
|
size_t start_pos,
|
|
size_t length,
|
|
size_t mask,
|
|
BROTLI_BOOL is_last,
|
|
const 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) */
|
|
BROTLI_INTERNAL void BrotliStoreMetaBlockFast(MemoryManager* m,
|
|
const uint8_t* input,
|
|
size_t start_pos,
|
|
size_t length,
|
|
size_t mask,
|
|
BROTLI_BOOL is_last,
|
|
const 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) */
|
|
BROTLI_INTERNAL void BrotliStoreUncompressedMetaBlock(
|
|
BROTLI_BOOL is_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. */
|
|
BROTLI_INTERNAL void BrotliStoreSyncMetaBlock(size_t* storage_ix,
|
|
uint8_t* storage);
|
|
|
|
#if defined(__cplusplus) || defined(c_plusplus)
|
|
} /* extern "C" */
|
|
#endif
|
|
|
|
#endif /* BROTLI_ENC_BROTLI_BIT_STREAM_H_ */
|