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 11 #ifndef WEBRTC_VIDEO_CALL_STATS_H_ 12 #define WEBRTC_VIDEO_CALL_STATS_H_ 13 14 #include <list> 15 16 #include "webrtc/base/constructormagic.h" 17 #include "webrtc/base/scoped_ptr.h" 18 #include "webrtc/modules/include/module.h" 19 #include "webrtc/system_wrappers/include/clock.h" 20 21 namespace webrtc { 22 23 class CallStatsObserver; 24 class CriticalSectionWrapper; 25 class RtcpRttStats; 26 27 // CallStats keeps track of statistics for a call. 28 class CallStats : public Module { 29 public: 30 friend class RtcpObserver; 31 32 explicit CallStats(Clock* clock); 33 ~CallStats(); 34 35 // Implements Module, to use the process thread. 36 int64_t TimeUntilNextProcess() override; 37 int32_t Process() override; 38 39 // Returns a RtcpRttStats to register at a statistics provider. The object 40 // has the same lifetime as the CallStats instance. 41 RtcpRttStats* rtcp_rtt_stats() const; 42 43 // Registers/deregisters a new observer to receive statistics updates. 44 void RegisterStatsObserver(CallStatsObserver* observer); 45 void DeregisterStatsObserver(CallStatsObserver* observer); 46 47 // Helper struct keeping track of the time a rtt value is reported. 48 struct RttTime { 49 RttTime(int64_t new_rtt, int64_t rtt_time) 50 : rtt(new_rtt), time(rtt_time) {} 51 const int64_t rtt; 52 const int64_t time; 53 }; 54 55 protected: 56 void OnRttUpdate(int64_t rtt); 57 58 int64_t avg_rtt_ms() const; 59 60 private: 61 Clock* const clock_; 62 // Protecting all members. 63 rtc::scoped_ptr<CriticalSectionWrapper> crit_; 64 // Observer receiving statistics updates. 65 rtc::scoped_ptr<RtcpRttStats> rtcp_rtt_stats_; 66 // The last time 'Process' resulted in statistic update. 67 int64_t last_process_time_; 68 // The last RTT in the statistics update (zero if there is no valid estimate). 69 int64_t max_rtt_ms_; 70 int64_t avg_rtt_ms_; 71 72 // All Rtt reports within valid time interval, oldest first. 73 std::list<RttTime> reports_; 74 75 // Observers getting stats reports. 76 std::list<CallStatsObserver*> observers_; 77 78 RTC_DISALLOW_COPY_AND_ASSIGN(CallStats); 79 }; 80 81 } // namespace webrtc 82 83 #endif // WEBRTC_VIDEO_CALL_STATS_H_ 84
