77 lines
2.5 KiB
C++
77 lines
2.5 KiB
C++
/* Copyright 2018 Dirk Steinke
|
|
|
|
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. */
|
|
|
|
#ifndef PREFLATE_TOKEN_PREDICTOR_H
|
|
#define PREFLATE_TOKEN_PREDICTOR_H
|
|
|
|
#include <vector>
|
|
|
|
#include "preflate_parameter_estimator.h"
|
|
#include "preflate_predictor_state.h"
|
|
#include "preflate_statistical_codec.h"
|
|
|
|
struct PreflateStatisticalModel;
|
|
struct PreflateStatisticalCodec;
|
|
|
|
struct PreflateTokenPredictor {
|
|
PreflatePredictorState state;
|
|
PreflateHashChainExt hash;
|
|
PreflateSeqChain seq;
|
|
PreflateParameters params;
|
|
bool predictionFailure;
|
|
bool fast;
|
|
unsigned prevLen;
|
|
PreflateToken pendingToken;
|
|
unsigned currentTokenCount;
|
|
bool emptyBlockAtEnd;
|
|
|
|
struct BlockAnalysisResult {
|
|
PreflateTokenBlock::Type type;
|
|
unsigned tokenCount;
|
|
bool blockSizePredicted;
|
|
bool inputEOF;
|
|
bool lastBlock;
|
|
uint8_t paddingBits, paddingCounts;
|
|
std::vector<unsigned char> tokenInfo;
|
|
std::vector<signed> correctives;
|
|
};
|
|
std::vector<BlockAnalysisResult> analysisResults;
|
|
|
|
PreflateTokenPredictor(const PreflateParameters& params,
|
|
const std::vector<unsigned char>& uncompressed,
|
|
const size_t offset);
|
|
void analyzeBlock(const unsigned blockno,
|
|
const PreflateTokenBlock& block);
|
|
void updateCounters(PreflateStatisticsCounter*,
|
|
const unsigned blockno);
|
|
void encodeBlock(PreflatePredictionEncoder*,
|
|
const unsigned blockno);
|
|
void encodeEOF(PreflatePredictionEncoder*,
|
|
const unsigned blockno,
|
|
const bool lastBlock);
|
|
|
|
PreflateTokenBlock decodeBlock(PreflatePredictionDecoder*);
|
|
bool decodeEOF(PreflatePredictionDecoder*);
|
|
bool inputEOF();
|
|
|
|
bool predictEOB();
|
|
PreflateToken predictToken();
|
|
bool repredictReference(PreflateToken& token);
|
|
PreflateRematchInfo repredictMatch(const PreflateToken&);
|
|
unsigned recalculateDistance(const PreflateToken&, const unsigned hops);
|
|
void commitToken(const PreflateToken&);
|
|
};
|
|
|
|
#endif /* PREFLATE_TOKEN_PREDICTOR_H */
|