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tdfec/td/fec/online/Decoder.h

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+/*
+    This file is part of TON Blockchain Library.
+
+    TON Blockchain Library is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation, either version 2 of the License, or
+    (at your option) any later version.
+
+    TON Blockchain Library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with TON Blockchain Library.  If not, see <http://www.gnu.org/licenses/>.
+
+    Copyright 2017-2019 Telegram Systems LLP
+*/
+#pragma once
+#include "td/fec/online/Rfc.h"
+#include "td/fec/common/SymbolRef.h"
+#include "td/fec/algebra/BeliefPropagationDecoding.h"
+
+#include "td/fec/online/Encoder.h"
+
+namespace td {
+namespace online_code {
+class Decoder {
+ public:
+  static Result<std::unique_ptr<Decoder>> create(Encoder::Parameters p);
+
+  Decoder(size_t symbol_size, size_t data_size);
+  Status add_symbol(raptorq::SymbolRef symbol_ref);
+
+  bool is_ready() const;
+
+  BufferSlice get_data() const;
+
+ private:
+  Rfc::Parameters parameters_;
+  size_t symbol_size_;
+  size_t data_size_;
+  size_t ready_cnt_{0};
+
+  BeliefPropagationDecoding decoding_{parameters_.source_blocks_count() + parameters_.outer_encoding_blocks_count(),
+                                      symbol_size_};
+};
+}  // namespace online_code
+}  // namespace td