blob: d76a210701a0add6d03b98fbf9f7a1d69e2933f7 [file] [log] [blame]
* 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.
#include <list>
#include <vector>
#include "webrtc/common_types.h"
#include "webrtc/modules/pacing/paced_sender.h"
#include "webrtc/modules/remote_bitrate_estimator/include/remote_bitrate_estimator.h"
#include "webrtc/modules/rtp_rtcp/include/rtp_rtcp_defines.h"
#include "webrtc/rtc_base/constructormagic.h"
#include "webrtc/rtc_base/criticalsection.h"
#include "webrtc/rtc_base/race_checker.h"
#include "webrtc/rtc_base/thread_annotations.h"
namespace webrtc {
class RtpRtcp;
namespace rtcp {
class TransportFeedback;
} // namespace rtcp
// PacketRouter keeps track of rtp send modules to support the pacer.
// In addition, it handles feedback messages, which are sent on a send
// module if possible (sender report), otherwise on receive module
// (receiver report). For the latter case, we also keep track of the
// receive modules.
class PacketRouter : public PacedSender::PacketSender,
public TransportSequenceNumberAllocator,
public RemoteBitrateObserver {
~PacketRouter() override;
// TODO(nisse): Delete, as soon as downstream app is updated.
RTC_DEPRECATED void AddRtpModule(RtpRtcp* rtp_module) {
RTC_DEPRECATED void RemoveRtpModule(RtpRtcp* rtp_module) {
void AddSendRtpModule(RtpRtcp* rtp_module, bool remb_candidate);
void RemoveSendRtpModule(RtpRtcp* rtp_module);
RTC_DEPRECATED void AddSendRtpModule(RtpRtcp* rtp_module) {
AddSendRtpModule(rtp_module, true);
void AddReceiveRtpModule(RtpRtcp* rtp_module, bool remb_candidate);
void RemoveReceiveRtpModule(RtpRtcp* rtp_module);
RTC_DEPRECATED void AddReceiveRtpModule(RtpRtcp* rtp_module) {
AddReceiveRtpModule(rtp_module, true);
// Implements PacedSender::Callback.
bool TimeToSendPacket(uint32_t ssrc,
uint16_t sequence_number,
int64_t capture_timestamp,
bool retransmission,
const PacedPacketInfo& packet_info) override;
size_t TimeToSendPadding(size_t bytes,
const PacedPacketInfo& packet_info) override;
void SetTransportWideSequenceNumber(uint16_t sequence_number);
uint16_t AllocateSequenceNumber() override;
// Called every time there is a new bitrate estimate for a receive channel
// group. This call will trigger a new RTCP REMB packet if the bitrate
// estimate has decreased or if no RTCP REMB packet has been sent for
// a certain time interval.
// Implements RtpReceiveBitrateUpdate.
void OnReceiveBitrateChanged(const std::vector<uint32_t>& ssrcs,
uint32_t bitrate_bps) override;
// Ensures remote party notified of the receive bitrate limit no larger than
// |bitrate_bps|.
void SetMaxDesiredReceiveBitrate(uint32_t bitrate_bps);
// Send REMB feedback.
virtual bool SendRemb(uint32_t bitrate_bps,
const std::vector<uint32_t>& ssrcs);
// Send transport feedback packet to send-side.
virtual bool SendTransportFeedback(rtcp::TransportFeedback* packet);
void AddRembModuleCandidate(RtpRtcp* candidate_module, bool sender)
void MaybeRemoveRembModuleCandidate(RtpRtcp* candidate_module, bool sender)
void UnsetActiveRembModule() RTC_EXCLUSIVE_LOCKS_REQUIRED(modules_crit_);
void DetermineActiveRembModule() RTC_EXCLUSIVE_LOCKS_REQUIRED(modules_crit_);
rtc::RaceChecker pacer_race_;
rtc::CriticalSection modules_crit_;
std::list<RtpRtcp*> rtp_send_modules_ RTC_GUARDED_BY(modules_crit_);
std::vector<RtpRtcp*> rtp_receive_modules_ RTC_GUARDED_BY(modules_crit_);
// TODO(eladalon): remb_crit_ only ever held from one function, and it's not
// clear if that function can actually be called from more than one thread.
rtc::CriticalSection remb_crit_;
// The last time a REMB was sent.
int64_t last_remb_time_ms_ RTC_GUARDED_BY(remb_crit_);
uint32_t last_send_bitrate_bps_ RTC_GUARDED_BY(remb_crit_);
// The last bitrate update.
uint32_t bitrate_bps_ RTC_GUARDED_BY(remb_crit_);
uint32_t max_bitrate_bps_ RTC_GUARDED_BY(remb_crit_);
// Candidates for the REMB module can be RTP sender/receiver modules, with
// the sender modules taking precedence.
std::vector<RtpRtcp*> sender_remb_candidates_ RTC_GUARDED_BY(modules_crit_);
std::vector<RtpRtcp*> receiver_remb_candidates_ RTC_GUARDED_BY(modules_crit_);
RtpRtcp* active_remb_module_ RTC_GUARDED_BY(modules_crit_);
volatile int transport_seq_;
} // namespace webrtc