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/*
* Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef MODULES_CONGESTION_CONTROLLER_RTP_TRANSPORT_FEEDBACK_ADAPTER_H_
#define MODULES_CONGESTION_CONTROLLER_RTP_TRANSPORT_FEEDBACK_ADAPTER_H_
#include <deque>
#include <map>
#include <utility>
#include <vector>
#include "api/sequence_checker.h"
#include "api/transport/network_types.h"
#include "api/units/timestamp.h"
#include "modules/rtp_rtcp/include/rtp_rtcp_defines.h"
#include "rtc_base/network/sent_packet.h"
#include "rtc_base/network_route.h"
#include "rtc_base/numerics/sequence_number_unwrapper.h"
#include "rtc_base/thread_annotations.h"
namespace webrtc {
struct PacketFeedback {
PacketFeedback() = default;
// Time corresponding to when this object was created.
Timestamp creation_time = Timestamp::MinusInfinity();
SentPacket sent;
// Time corresponding to when the packet was received. Timestamped with the
// receiver's clock. For unreceived packet, Timestamp::PlusInfinity() is
// used.
Timestamp receive_time = Timestamp::PlusInfinity();
// The network route that this packet is associated with.
rtc::NetworkRoute network_route;
};
class InFlightBytesTracker {
public:
void AddInFlightPacketBytes(const PacketFeedback& packet);
void RemoveInFlightPacketBytes(const PacketFeedback& packet);
DataSize GetOutstandingData(const rtc::NetworkRoute& network_route) const;
private:
struct NetworkRouteComparator {
bool operator()(const rtc::NetworkRoute& a,
const rtc::NetworkRoute& b) const;
};
std::map<rtc::NetworkRoute, DataSize, NetworkRouteComparator> in_flight_data_;
};
class TransportFeedbackAdapter {
public:
TransportFeedbackAdapter();
void AddPacket(const RtpPacketSendInfo& packet_info,
size_t overhead_bytes,
Timestamp creation_time);
absl::optional<SentPacket> ProcessSentPacket(
const rtc::SentPacket& sent_packet);
absl::optional<TransportPacketsFeedback> ProcessTransportFeedback(
const rtcp::TransportFeedback& feedback,
Timestamp feedback_receive_time);
void SetNetworkRoute(const rtc::NetworkRoute& network_route);
DataSize GetOutstandingData() const;
private:
enum class SendTimeHistoryStatus { kNotAdded, kOk, kDuplicate };
std::vector<PacketResult> ProcessTransportFeedbackInner(
const rtcp::TransportFeedback& feedback,
Timestamp feedback_receive_time);
DataSize pending_untracked_size_ = DataSize::Zero();
Timestamp last_send_time_ = Timestamp::MinusInfinity();
Timestamp last_untracked_send_time_ = Timestamp::MinusInfinity();
RtpSequenceNumberUnwrapper seq_num_unwrapper_;
std::map<int64_t, PacketFeedback> history_;
// Sequence numbers are never negative, using -1 as it always < a real
// sequence number.
int64_t last_ack_seq_num_ = -1;
InFlightBytesTracker in_flight_;
Timestamp current_offset_ = Timestamp::MinusInfinity();
Timestamp last_timestamp_ = Timestamp::MinusInfinity();
rtc::NetworkRoute network_route_;
};
} // namespace webrtc
#endif // MODULES_CONGESTION_CONTROLLER_RTP_TRANSPORT_FEEDBACK_ADAPTER_H_
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