1 /* 2 * Copyright (c) 2015 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 11 #ifndef WEBRTC_MODULES_RTP_RTCP_SOURCE_PACKET_LOSS_STATS_H_ 12 #define WEBRTC_MODULES_RTP_RTCP_SOURCE_PACKET_LOSS_STATS_H_ 13 14 #include <stdint.h> 15 #include <set> 16 17 namespace webrtc { 18 19 // Keeps track of statistics of packet loss including whether losses are a 20 // single packet or multiple packets in a row. 21 class PacketLossStats { 22 public: 23 PacketLossStats(); ~PacketLossStats()24 ~PacketLossStats() {} 25 26 // Adds a lost packet to the stats by sequence number. 27 void AddLostPacket(uint16_t sequence_number); 28 29 // Queries the number of packets that were lost by themselves, no neighboring 30 // packets were lost. 31 int GetSingleLossCount() const; 32 33 // Queries the number of times that multiple packets with sequential numbers 34 // were lost. This is the number of events with more than one packet lost, 35 // regardless of the size of the event; 36 int GetMultipleLossEventCount() const; 37 38 // Queries the number of packets lost in multiple packet loss events. Combined 39 // with the event count, this can be used to determine the average event size. 40 int GetMultipleLossPacketCount() const; 41 42 private: 43 std::set<uint16_t> lost_packets_buffer_; 44 std::set<uint16_t> lost_packets_wrapped_buffer_; 45 int single_loss_historic_count_; 46 int multiple_loss_historic_event_count_; 47 int multiple_loss_historic_packet_count_; 48 49 void ComputeLossCounts(int* out_single_loss_count, 50 int* out_multiple_loss_event_count, 51 int* out_multiple_loss_packet_count) const; 52 void PruneBuffer(); 53 }; 54 55 } // namespace webrtc 56 57 #endif // WEBRTC_MODULES_RTP_RTCP_SOURCE_PACKET_LOSS_STATS_H_ 58