1b77daea81
Since PacketRouter now is only used on the worker thread, there is no need for a lock. Bug: webrtc:14502 Change-Id: I65778f68b7e211d7bc7388a4615888a49ceb5f59 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/300964 Reviewed-by: Erik Språng <sprang@webrtc.org> Commit-Queue: Per Kjellander <perkj@webrtc.org> Reviewed-by: Markus Handell <handellm@webrtc.org> Cr-Commit-Position: refs/heads/main@{#39848}
114 lines
4.2 KiB
C++
114 lines
4.2 KiB
C++
/*
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* Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef MODULES_PACING_PACKET_ROUTER_H_
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#define MODULES_PACING_PACKET_ROUTER_H_
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#include <stddef.h>
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#include <stdint.h>
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#include <list>
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#include <memory>
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#include <unordered_map>
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#include <utility>
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#include <vector>
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#include "api/sequence_checker.h"
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#include "api/transport/network_types.h"
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#include "modules/pacing/pacing_controller.h"
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#include "modules/rtp_rtcp/include/rtp_rtcp_defines.h"
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#include "modules/rtp_rtcp/source/rtcp_packet.h"
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#include "modules/rtp_rtcp/source/rtp_packet_to_send.h"
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#include "rtc_base/thread_annotations.h"
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namespace webrtc {
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class RtpRtcpInterface;
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// PacketRouter keeps track of rtp send modules to support the pacer.
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// In addition, it handles feedback messages, which are sent on a send
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// module if possible (sender report), otherwise on receive module
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// (receiver report). For the latter case, we also keep track of the
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// receive modules.
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class PacketRouter : public PacingController::PacketSender {
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public:
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PacketRouter();
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explicit PacketRouter(uint16_t start_transport_seq);
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~PacketRouter() override;
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PacketRouter(const PacketRouter&) = delete;
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PacketRouter& operator=(const PacketRouter&) = delete;
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void AddSendRtpModule(RtpRtcpInterface* rtp_module, bool remb_candidate);
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void RemoveSendRtpModule(RtpRtcpInterface* rtp_module);
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void AddReceiveRtpModule(RtcpFeedbackSenderInterface* rtcp_sender,
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bool remb_candidate);
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void RemoveReceiveRtpModule(RtcpFeedbackSenderInterface* rtcp_sender);
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void SendPacket(std::unique_ptr<RtpPacketToSend> packet,
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const PacedPacketInfo& cluster_info) override;
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std::vector<std::unique_ptr<RtpPacketToSend>> FetchFec() override;
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std::vector<std::unique_ptr<RtpPacketToSend>> GeneratePadding(
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DataSize size) override;
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void OnAbortedRetransmissions(
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uint32_t ssrc,
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rtc::ArrayView<const uint16_t> sequence_numbers) override;
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absl::optional<uint32_t> GetRtxSsrcForMedia(uint32_t ssrc) const override;
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uint16_t CurrentTransportSequenceNumber() const;
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// Send REMB feedback.
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void SendRemb(int64_t bitrate_bps, std::vector<uint32_t> ssrcs);
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// Sends `packets` in one or more IP packets.
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void SendCombinedRtcpPacket(
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std::vector<std::unique_ptr<rtcp::RtcpPacket>> packets);
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private:
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void AddRembModuleCandidate(RtcpFeedbackSenderInterface* candidate_module,
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bool media_sender);
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void MaybeRemoveRembModuleCandidate(
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RtcpFeedbackSenderInterface* candidate_module,
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bool media_sender);
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void UnsetActiveRembModule();
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void DetermineActiveRembModule();
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void AddSendRtpModuleToMap(RtpRtcpInterface* rtp_module, uint32_t ssrc);
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void RemoveSendRtpModuleFromMap(uint32_t ssrc);
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SequenceChecker thread_checker_;
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// Ssrc to RtpRtcpInterface module;
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std::unordered_map<uint32_t, RtpRtcpInterface*> send_modules_map_
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RTC_GUARDED_BY(thread_checker_);
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std::list<RtpRtcpInterface*> send_modules_list_
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RTC_GUARDED_BY(thread_checker_);
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// The last module used to send media.
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RtpRtcpInterface* last_send_module_ RTC_GUARDED_BY(thread_checker_);
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// Rtcp modules of the rtp receivers.
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std::vector<RtcpFeedbackSenderInterface*> rtcp_feedback_senders_
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RTC_GUARDED_BY(thread_checker_);
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// Candidates for the REMB module can be RTP sender/receiver modules, with
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// the sender modules taking precedence.
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std::vector<RtcpFeedbackSenderInterface*> sender_remb_candidates_
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RTC_GUARDED_BY(thread_checker_);
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std::vector<RtcpFeedbackSenderInterface*> receiver_remb_candidates_
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RTC_GUARDED_BY(thread_checker_);
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RtcpFeedbackSenderInterface* active_remb_module_
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RTC_GUARDED_BY(thread_checker_);
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uint64_t transport_seq_ RTC_GUARDED_BY(thread_checker_);
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std::vector<std::unique_ptr<RtpPacketToSend>> pending_fec_packets_
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RTC_GUARDED_BY(thread_checker_);
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};
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} // namespace webrtc
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#endif // MODULES_PACING_PACKET_ROUTER_H_
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