mirror of
https://github.com/ton-blockchain/ton
synced 2025-03-09 15:40:10 +00:00
24 lines
728 B
C++
24 lines
728 B
C++
#include "FecHelper.h"
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#include "td/utils/check.h"
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namespace ton {
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namespace rldp2 {
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td::uint32 FecHelper::get_fec_symbols_count() const {
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constexpr td::uint32 x = 5;
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constexpr td::uint32 y = 5;
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// smallest (symbols_count + x + y * i) > received_symbols_count
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if (symbols_count + x > received_symbols_count) {
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return symbols_count + x;
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}
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td::uint32 i = (received_symbols_count - (symbols_count + x)) / y + 1;
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return symbols_count + x + i * y;
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}
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td::uint32 FecHelper::get_left_fec_symbols_count() const {
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auto fec_symbols_count = get_fec_symbols_count();
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CHECK(fec_symbols_count > received_symbols_count);
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return fec_symbols_count - received_symbols_count;
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}
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} // namespace rldp2
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} // namespace ton
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