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/interface/rtp_rtcp_defines.h" 19 #include "webrtc/system_wrappers/interface/critical_section_wrapper.h" 20 21 namespace webrtc { 22 class SendSideBandwidthEstimation { 23 public: 24 SendSideBandwidthEstimation(); 25 virtual ~SendSideBandwidthEstimation(); 26 27 void CurrentEstimate(uint32_t* bitrate, uint8_t* loss, uint32_t* rtt) const; 28 29 // Call periodically to update estimate. 30 void UpdateEstimate(uint32_t now_ms); 31 32 // Call when we receive a RTCP message with TMMBR or REMB. 33 void UpdateReceiverEstimate(uint32_t bandwidth); 34 35 // Call when we receive a RTCP message with a ReceiveBlock. 36 void UpdateReceiverBlock(uint8_t fraction_loss, 37 uint32_t rtt, 38 int number_of_packets, 39 uint32_t now_ms); 40 41 void SetSendBitrate(uint32_t bitrate); 42 void SetMinMaxBitrate(uint32_t min_bitrate, uint32_t max_bitrate); 43 void SetMinBitrate(uint32_t min_bitrate); 44 45 private: 46 void CapBitrateToThresholds(); 47 48 // Updates history of min bitrates. 49 // After this method returns min_bitrate_history_.front().second contains the 50 // min bitrate used during last kBweIncreaseIntervalMs. 51 void UpdateMinHistory(uint32_t now_ms); 52 53 std::deque<std::pair<uint32_t, uint32_t> > min_bitrate_history_; 54 55 // incoming filters 56 int accumulate_lost_packets_Q8_; 57 int accumulate_expected_packets_; 58 59 uint32_t bitrate_; 60 uint32_t min_bitrate_configured_; 61 uint32_t max_bitrate_configured_; 62 63 uint32_t time_last_receiver_block_ms_; 64 uint8_t last_fraction_loss_; 65 uint16_t last_round_trip_time_ms_; 66 67 uint32_t bwe_incoming_; 68 uint32_t time_last_decrease_ms_; 69 }; 70 } // namespace webrtc 71 #endif // WEBRTC_MODULES_BITRATE_CONTROLLER_SEND_SIDE_BANDWIDTH_ESTIMATION_H_ 72