| /* |
| * 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_REMOTE_BITRATE_ESTIMATOR_REMOTE_BITRATE_ESTIMATOR_ABS_SEND_TIME_H_ |
| #define MODULES_REMOTE_BITRATE_ESTIMATOR_REMOTE_BITRATE_ESTIMATOR_ABS_SEND_TIME_H_ |
| |
| #include <stddef.h> |
| #include <stdint.h> |
| |
| #include <list> |
| #include <map> |
| #include <memory> |
| #include <vector> |
| |
| #include "api/rtp_headers.h" |
| #include "api/transport/field_trial_based_config.h" |
| #include "api/units/data_rate.h" |
| #include "api/units/data_size.h" |
| #include "api/units/time_delta.h" |
| #include "api/units/timestamp.h" |
| #include "modules/remote_bitrate_estimator/aimd_rate_control.h" |
| #include "modules/remote_bitrate_estimator/include/remote_bitrate_estimator.h" |
| #include "modules/remote_bitrate_estimator/inter_arrival.h" |
| #include "modules/remote_bitrate_estimator/overuse_detector.h" |
| #include "modules/remote_bitrate_estimator/overuse_estimator.h" |
| #include "rtc_base/checks.h" |
| #include "rtc_base/race_checker.h" |
| #include "rtc_base/rate_statistics.h" |
| #include "rtc_base/synchronization/mutex.h" |
| #include "rtc_base/thread_annotations.h" |
| #include "system_wrappers/include/clock.h" |
| |
| namespace webrtc { |
| |
| class RemoteBitrateEstimatorAbsSendTime : public RemoteBitrateEstimator { |
| public: |
| RemoteBitrateEstimatorAbsSendTime(RemoteBitrateObserver* observer, |
| Clock* clock); |
| |
| RemoteBitrateEstimatorAbsSendTime() = delete; |
| RemoteBitrateEstimatorAbsSendTime(const RemoteBitrateEstimatorAbsSendTime&) = |
| delete; |
| RemoteBitrateEstimatorAbsSendTime& operator=( |
| const RemoteBitrateEstimatorAbsSendTime&) = delete; |
| |
| ~RemoteBitrateEstimatorAbsSendTime() override; |
| |
| void IncomingPacket(int64_t arrival_time_ms, |
| size_t payload_size, |
| const RTPHeader& header) override; |
| TimeDelta Process() override; |
| void OnRttUpdate(int64_t avg_rtt_ms, int64_t max_rtt_ms) override; |
| void RemoveStream(uint32_t ssrc) override; |
| DataRate LatestEstimate() const override; |
| |
| private: |
| struct Probe { |
| Probe(Timestamp send_time, Timestamp recv_time, DataSize payload_size) |
| : send_time(send_time), |
| recv_time(recv_time), |
| payload_size(payload_size) {} |
| |
| Timestamp send_time; |
| Timestamp recv_time; |
| DataSize payload_size; |
| }; |
| |
| struct Cluster { |
| DataRate SendBitrate() const { return mean_size / send_mean; } |
| DataRate RecvBitrate() const { return mean_size / recv_mean; } |
| |
| TimeDelta send_mean = TimeDelta::Zero(); |
| TimeDelta recv_mean = TimeDelta::Zero(); |
| // TODO(holmer): Add some variance metric as well? |
| DataSize mean_size = DataSize::Zero(); |
| int count = 0; |
| int num_above_min_delta = 0; |
| }; |
| |
| enum class ProbeResult { kBitrateUpdated, kNoUpdate }; |
| |
| static bool IsWithinClusterBounds(TimeDelta send_delta, |
| const Cluster& cluster_aggregate); |
| |
| static void MaybeAddCluster(const Cluster& cluster_aggregate, |
| std::list<Cluster>& clusters); |
| |
| void IncomingPacketInfo(Timestamp arrival_time, |
| uint32_t send_time_24bits, |
| DataSize payload_size, |
| uint32_t ssrc); |
| |
| std::list<Cluster> ComputeClusters() const; |
| |
| const Cluster* FindBestProbe(const std::list<Cluster>& clusters) const; |
| |
| // Returns true if a probe which changed the estimate was detected. |
| ProbeResult ProcessClusters(Timestamp now) |
| RTC_EXCLUSIVE_LOCKS_REQUIRED(&mutex_); |
| |
| bool IsBitrateImproving(DataRate probe_bitrate) const |
| RTC_EXCLUSIVE_LOCKS_REQUIRED(&mutex_); |
| |
| void TimeoutStreams(Timestamp now) RTC_EXCLUSIVE_LOCKS_REQUIRED(&mutex_); |
| |
| rtc::RaceChecker network_race_; |
| Clock* const clock_; |
| const FieldTrialBasedConfig field_trials_; |
| RemoteBitrateObserver* const observer_; |
| std::unique_ptr<InterArrival> inter_arrival_; |
| std::unique_ptr<OveruseEstimator> estimator_; |
| OveruseDetector detector_; |
| RateStatistics incoming_bitrate_{kBitrateWindowMs, 8000}; |
| bool incoming_bitrate_initialized_ = false; |
| std::list<Probe> probes_; |
| size_t total_probes_received_ = 0; |
| Timestamp first_packet_time_ = Timestamp::MinusInfinity(); |
| Timestamp last_update_ = Timestamp::MinusInfinity(); |
| bool uma_recorded_ = false; |
| |
| mutable Mutex mutex_; |
| std::map<uint32_t, Timestamp> ssrcs_ RTC_GUARDED_BY(&mutex_); |
| AimdRateControl remote_rate_ RTC_GUARDED_BY(&mutex_); |
| }; |
| |
| } // namespace webrtc |
| |
| #endif // MODULES_REMOTE_BITRATE_ESTIMATOR_REMOTE_BITRATE_ESTIMATOR_ABS_SEND_TIME_H_ |