91 lines
3.2 KiB
C++
91 lines
3.2 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_DECODER_H
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#define PREFLATE_DECODER_H
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#include <functional>
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#include <queue>
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#include <vector>
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#include "preflate_statistical_codec.h"
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#include "preflate_token.h"
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#include "support/stream.h"
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#include "support/task_pool.h"
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struct PreflateTokenPredictor;
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struct PreflateTreePredictor;
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class PreflateDecoderTask {
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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 uint32_t setModel(const PreflateStatisticsCounter&, const PreflateParameters&) = 0;
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virtual bool beginEncoding(const uint32_t metaBlockId, PreflatePredictionEncoder&, const uint32_t modelId) = 0;
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virtual bool endEncoding(const uint32_t metaBlockId, PreflatePredictionEncoder&, const size_t uncompressedSize) = 0;
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virtual void markProgress() = 0;
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};
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PreflateDecoderTask(Handler& handler,
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const uint32_t metaBlockId,
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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 bool lastMetaBlock,
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const uint32_t paddingBits);
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bool analyze();
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bool encode();
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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<PreflateTokenBlock> tokenData;
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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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uint32_t paddingBits;
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PreflateParameters params;
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PreflateStatisticsCounter counter;
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std::unique_ptr<PreflateTokenPredictor> tokenPredictor;
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std::unique_ptr<PreflateTreePredictor> treePredictor;
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};
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bool preflate_decode(OutputStream& unpacked_output,
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std::vector<unsigned char>& preflate_diff,
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uint64_t& deflate_size,
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InputStream& deflate_raw,
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std::function<void(void)> block_callback,
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const size_t min_deflate_size,
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const size_t metaBlockSize = INT32_MAX);
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bool preflate_decode(std::vector<unsigned char>& unpacked_output,
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std::vector<unsigned char>& preflate_diff,
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const std::vector<unsigned char>& deflate_raw,
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const size_t metaBlockSize = INT32_MAX);
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bool preflate_decode(std::vector<unsigned char>& unpacked_output,
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std::vector<unsigned char>& preflate_diff,
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uint64_t& deflate_size,
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InputStream& deflate_raw,
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std::function<void (void)> block_callback,
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const size_t min_deflate_size,
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const size_t metaBlockSize = INT32_MAX);
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#endif /* PREFLATE_DECODER_H */
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