1 /* 2 * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 * 10 * FEC and NACK added bitrate is handled outside class 11 */ 12 13 #ifndef WEBRTC_MODULES_BITRATE_CONTROLLER_SEND_SIDE_BANDWIDTH_ESTIMATION_H_ 14 #define WEBRTC_MODULES_BITRATE_CONTROLLER_SEND_SIDE_BANDWIDTH_ESTIMATION_H_ 15 16 #include <deque> 17 18 #include "webrtc/modules/rtp_rtcp/include/rtp_rtcp_defines.h" 19 #include "webrtc/system_wrappers/include/critical_section_wrapper.h" 20 21 namespace webrtc { 22 23 class RtcEventLog; 24 25 class SendSideBandwidthEstimation { 26 public: 27 SendSideBandwidthEstimation(); 28 virtual ~SendSideBandwidthEstimation(); 29 30 void CurrentEstimate(int* bitrate, uint8_t* loss, int64_t* rtt) const; 31 32 // Call periodically to update estimate. 33 void UpdateEstimate(int64_t now_ms); 34 35 // Call when we receive a RTCP message with TMMBR or REMB. 36 void UpdateReceiverEstimate(int64_t now_ms, uint32_t bandwidth); 37 38 // Call when we receive a RTCP message with a ReceiveBlock. 39 void UpdateReceiverBlock(uint8_t fraction_loss, 40 int64_t rtt, 41 int number_of_packets, 42 int64_t now_ms); 43 44 void SetSendBitrate(int bitrate); 45 void SetMinMaxBitrate(int min_bitrate, int max_bitrate); 46 int GetMinBitrate() const; 47 48 void SetEventLog(RtcEventLog* event_log); 49 50 private: 51 enum UmaState { kNoUpdate, kFirstDone, kDone }; 52 53 bool IsInStartPhase(int64_t now_ms) const; 54 55 void UpdateUmaStats(int64_t now_ms, int64_t rtt, int lost_packets); 56 57 // Returns the input bitrate capped to the thresholds defined by the max, 58 // min and incoming bandwidth. 59 uint32_t CapBitrateToThresholds(int64_t now_ms, uint32_t bitrate); 60 61 // Updates history of min bitrates. 62 // After this method returns min_bitrate_history_.front().second contains the 63 // min bitrate used during last kBweIncreaseIntervalMs. 64 void UpdateMinHistory(int64_t now_ms); 65 66 std::deque<std::pair<int64_t, uint32_t> > min_bitrate_history_; 67 68 // incoming filters 69 int lost_packets_since_last_loss_update_Q8_; 70 int expected_packets_since_last_loss_update_; 71 72 uint32_t bitrate_; 73 uint32_t min_bitrate_configured_; 74 uint32_t max_bitrate_configured_; 75 int64_t last_low_bitrate_log_ms_; 76 77 bool has_decreased_since_last_fraction_loss_; 78 int64_t time_last_receiver_block_ms_; 79 uint8_t last_fraction_loss_; 80 int64_t last_round_trip_time_ms_; 81 82 uint32_t bwe_incoming_; 83 int64_t time_last_decrease_ms_; 84 int64_t first_report_time_ms_; 85 int initially_lost_packets_; 86 int bitrate_at_2_seconds_kbps_; 87 UmaState uma_update_state_; 88 std::vector<bool> rampup_uma_stats_updated_; 89 RtcEventLog* event_log_; 90 }; 91 } // namespace webrtc 92 #endif // WEBRTC_MODULES_BITRATE_CONTROLLER_SEND_SIDE_BANDWIDTH_ESTIMATION_H_ 93