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72 lines
1.9 KiB
C++
72 lines
1.9 KiB
C++
/*
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This file is part of TON Blockchain Library.
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TON Blockchain Library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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TON Blockchain Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with TON Blockchain Library. If not, see <http://www.gnu.org/licenses/>.
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Copyright 2017-2019 Telegram Systems LLP
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*/
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#pragma once
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#include "td/fec/raptorq/Solver.h"
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#include "td/fec/raptorq/Encoder.h"
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#include <set>
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namespace td {
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namespace raptorq {
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class Decoder {
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public:
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static Result<std::unique_ptr<Decoder>> create(Encoder::Parameters p);
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Decoder(const Rfc::Parameters &p, size_t symbol_size, size_t data_size);
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Status add_symbol(SymbolRef symbol);
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struct DataWithEncoder {
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BufferSlice data;
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std::unique_ptr<Encoder> encoder;
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};
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Result<DataWithEncoder> try_decode(bool need_encoder);
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bool may_try_decode() const;
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private:
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Rfc::Parameters p_;
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size_t symbol_size_;
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bool may_decode_{false};
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vector<bool> mask_;
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size_t mask_size_{0};
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BufferSlice data_;
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size_t data_size_;
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bool flush_symbols_{false};
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bool slow_path_{false};
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size_t slow_symbols_;
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BufferSlice buffer_;
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std::vector<SymbolRef> symbols_;
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std::set<uint32> slow_symbols_set_;
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std::string zero_symbol_;
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void add_small_symbol(SymbolRef symbol);
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void add_big_symbol(SymbolRef symbol);
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void update_may_decode();
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void on_first_slow_path();
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void flush_symbols();
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};
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} // namespace raptorq
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} // namespace td
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