mirror of
https://github.com/mii443/libdatachannel.git
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95 lines
2.6 KiB
C++
95 lines
2.6 KiB
C++
/**
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* Copyright (c) 2020 Filip Klembara (in2core)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program 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 General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef RTC_RTCP_NACK_RESPONDER_H
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#define RTC_RTCP_NACK_RESPONDER_H
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#if RTC_ENABLE_MEDIA
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#include "mediahandlerelement.hpp"
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#include <unordered_map>
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#include <queue>
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namespace rtc {
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class RTC_CPP_EXPORT RtcpNackResponder: public MediaHandlerElement {
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/// Packet storage
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class RTC_CPP_EXPORT Storage {
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/// Packet storage element
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struct RTC_CPP_EXPORT Element {
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Element(binary_ptr packet, uint16_t sequenceNumber, shared_ptr<Element> next = nullptr);
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const binary_ptr packet;
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const uint16_t sequenceNumber;
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/// Pointer to newer element
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shared_ptr<Element> next = nullptr;
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};
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private:
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/// Oldest packet in storage
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shared_ptr<Element> oldest = nullptr;
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/// Newest packet in storage
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shared_ptr<Element> newest = nullptr;
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/// Inner storage
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std::unordered_map<uint16_t, shared_ptr<Element>> storage{};
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/// Maximum storage size
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const unsigned maximumSize;
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/// Returnst current size
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unsigned size();
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public:
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static const unsigned defaultMaximumSize = 512;
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Storage(unsigned _maximumSize);
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/// Returns packet with given sequence number
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optional<binary_ptr> get(uint16_t sequenceNumber);
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/// Stores packet
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/// @param packet Packet
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void store(binary_ptr packet);
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};
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const shared_ptr<Storage> storage;
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std::mutex reportMutex;
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public:
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RtcpNackResponder(unsigned maxStoredPacketCount = Storage::defaultMaximumSize);
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/// Checks for RTCP NACK and handles it,
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/// @param message RTCP message
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/// @returns unchanged RTCP message and requested RTP packets
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ChainedIncomingControlProduct processIncomingControlMessage(message_ptr message) override;
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/// Stores RTP packets in internal storage
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/// @param messages RTP packets
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/// @param control RTCP
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/// @returns Unchanged RTP and RTCP
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ChainedOutgoingProduct processOutgoingBinaryMessage(ChainedMessagesProduct messages, message_ptr control) override;
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};
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} // namespace rtc
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#endif /* RTC_ENABLE_MEDIA */
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#endif /* RTC_RTCP_NACK_RESPONDER_H */
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