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69 lines
2.0 KiB
C++
69 lines
2.0 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/RawEncoder.h"
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#include "td/fec/common/SymbolsView.h"
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#include "td/utils/optional.h"
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#include "td/utils/buffer.h"
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#include <atomic>
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namespace td {
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namespace raptorq {
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class Encoder {
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public:
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struct Parameters {
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size_t symbols_count;
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size_t symbol_size;
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size_t data_size;
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};
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struct Info {
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uint32 symbol_count;
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uint32 ready_symbol_count;
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};
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static Result<std::unique_ptr<Encoder>> create(size_t symbol_size, BufferSlice data);
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static std::unique_ptr<Encoder> create(size_t symbol_size, RawEncoder raw_encoder);
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Encoder(Rfc::Parameters p, size_t symbol_size, BufferSlice data, optional<RawEncoder> raw_encoder = {});
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Status gen_symbol(uint32 id, MutableSlice slice);
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Parameters get_parameters() const;
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Info get_info() const;
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bool has_precalc() const;
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// Must be called only once. No concurrent calls are allowed.
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// Also it may be and should be called from another thread.
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void precalc();
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private:
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Rfc::Parameters p_;
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size_t symbol_size_;
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BufferSlice data_;
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SymbolsView first_symbols_{p_.K_padded, symbol_size_, data_.as_slice()};
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optional<RawEncoder> raw_encoder_;
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std::atomic<bool> has_encoder_{false};
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};
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} // namespace raptorq
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} // namespace td
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