80 lines
2.8 KiB
C++
80 lines
2.8 KiB
C++
/* Copyright 2018 Dirk Steinke
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License. */
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#ifndef PREFLATE_REENCODER_H
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#define PREFLATE_REENCODER_H
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#include <vector>
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#include "preflate_statistical_codec.h"
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#include "support/stream.h"
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#include "support/task_pool.h"
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class PreflateReencoderTask {
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public:
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class Handler {
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public:
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virtual ~Handler() {}
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virtual bool beginDecoding(const uint32_t metaBlockId,
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PreflatePredictionDecoder&, PreflateParameters&) = 0;
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virtual bool endDecoding(const uint32_t metaBlockId, PreflatePredictionDecoder&,
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std::vector<PreflateTokenBlock>&& tokenData,
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std::vector<uint8_t>&& uncompressedData,
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const size_t uncompressedOffset,
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const size_t paddingBitCount,
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const size_t paddingValue) = 0;
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virtual void markProgress() = 0;
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};
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PreflateReencoderTask(Handler& handler,
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const uint32_t metaBlockId,
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std::vector<uint8_t>&& uncompressedData,
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const size_t uncompressedOffset,
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const bool lastMetaBlock);
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bool decodeAndRepredict();
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bool reencode();
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uint32_t id() {
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return metaBlockId;
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}
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private:
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Handler& handler;
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uint32_t metaBlockId;
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std::vector<uint8_t> uncompressedData;
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size_t uncompressedOffset;
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bool lastMetaBlock;
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std::vector<PreflateTokenBlock> tokenData;
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PreflatePredictionDecoder pcodec;
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size_t paddingBitCount;
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size_t paddingBits;
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};
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bool preflate_reencode(std::vector<unsigned char>& deflate_raw,
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const std::vector<unsigned char>& preflate_diff,
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const std::vector<unsigned char>& unpacked_input);
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bool preflate_reencode(OutputStream& os,
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const std::vector<unsigned char>& preflate_diff,
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InputStream& unpacked_input,
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const uint64_t unpacked_size,
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std::function<void(void)> block_callback);
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bool preflate_reencode(OutputStream& os,
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const std::vector<unsigned char>& preflate_diff,
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const std::vector<unsigned char>& unpacked_input,
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std::function<void(void)> block_callback);
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#endif /* PREFLATE_REENCODER_H */
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