1 /* 2 * Copyright (c) 2014 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 VIDEO_REPORT_BLOCK_STATS_H_ 12 #define VIDEO_REPORT_BLOCK_STATS_H_ 13 14 #include <stdint.h> 15 16 #include <map> 17 18 #include "modules/rtp_rtcp/include/rtcp_statistics.h" 19 20 namespace webrtc { 21 22 // TODO(nisse): Usefulness of this class is somewhat unclear. The inputs are 23 // cumulative counters, from which we compute deltas, and then accumulate the 24 // deltas. May be needed on the send side, to handle wraparound in the short 25 // counters received over RTCP, but should not be needed on the receive side 26 // where we can use large enough types for all counters we need. 27 28 // Helper class for rtcp statistics. 29 class ReportBlockStats { 30 public: 31 ReportBlockStats(); 32 ~ReportBlockStats(); 33 34 // Updates stats and stores report block. 35 void Store(uint32_t ssrc, const RtcpStatistics& rtcp_stats); 36 37 // Returns the total fraction of lost packets (or -1 if less than two report 38 // blocks have been stored). 39 int FractionLostInPercent() const; 40 41 private: 42 // The information from an RTCP report block that we need. 43 struct Report { 44 uint32_t extended_highest_sequence_number; 45 int32_t packets_lost; 46 }; 47 48 // Updates the total number of packets/lost packets. 49 // Stores the report. 50 void StoreAndAddPacketIncrement(uint32_t ssrc, const Report& report); 51 52 // The total number of packets/lost packets. 53 uint32_t num_sequence_numbers_; 54 uint32_t num_lost_sequence_numbers_; 55 56 // Map holding the last stored report (mapped by the source SSRC). 57 std::map<uint32_t, Report> prev_reports_; 58 }; 59 60 } // namespace webrtc 61 62 #endif // VIDEO_REPORT_BLOCK_STATS_H_ 63