mirror of
https://github.com/google/brotli.git
synced 2024-11-22 11:40:06 +00:00
89a6fb85fb
Disable all slow features for quality <= 9 (literal cost modeling, dictionary, context modeling, advanced block splitting). Change vector<Command> arguments of internal functions to Command* and size_t.
75 lines
2.1 KiB
C++
75 lines
2.1 KiB
C++
// Copyright 2013 Google Inc. All Rights Reserved.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
//
|
|
// Block split point selection utilities.
|
|
|
|
#ifndef BROTLI_ENC_BLOCK_SPLITTER_H_
|
|
#define BROTLI_ENC_BLOCK_SPLITTER_H_
|
|
|
|
#include <stddef.h>
|
|
#include <stdint.h>
|
|
#include <string.h>
|
|
#include <vector>
|
|
#include <utility>
|
|
|
|
#include "./command.h"
|
|
#include "./metablock.h"
|
|
|
|
namespace brotli {
|
|
|
|
struct BlockSplitIterator {
|
|
explicit BlockSplitIterator(const BlockSplit& split)
|
|
: split_(split), idx_(0), type_(0), length_(0) {
|
|
if (!split.lengths.empty()) {
|
|
length_ = split.lengths[0];
|
|
}
|
|
}
|
|
|
|
void Next() {
|
|
if (length_ == 0) {
|
|
++idx_;
|
|
type_ = split_.types[idx_];
|
|
length_ = split_.lengths[idx_];
|
|
}
|
|
--length_;
|
|
}
|
|
|
|
const BlockSplit& split_;
|
|
int idx_;
|
|
int type_;
|
|
int length_;
|
|
};
|
|
|
|
void CopyLiteralsToByteArray(const Command* cmds,
|
|
const size_t num_commands,
|
|
const uint8_t* data,
|
|
std::vector<uint8_t>* literals);
|
|
|
|
void SplitBlock(const Command* cmds,
|
|
const size_t num_commands,
|
|
const uint8_t* data,
|
|
BlockSplit* literal_split,
|
|
BlockSplit* insert_and_copy_split,
|
|
BlockSplit* dist_split);
|
|
|
|
void SplitBlockByTotalLength(const Command* all_commands,
|
|
const size_t num_commands,
|
|
int input_size,
|
|
int target_length,
|
|
std::vector<std::vector<Command> >* blocks);
|
|
|
|
} // namespace brotli
|
|
|
|
#endif // BROTLI_ENC_BLOCK_SPLITTER_H_
|