brotli/enc/block_splitter.h
Zoltan Szabadka 89a6fb85fb Add params to disable static dictionary and context modeling.
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.
2015-04-23 13:15:42 +02:00

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_