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_ENGINE_CALL_STATS_H_ 12 #define WEBRTC_VIDEO_ENGINE_CALL_STATS_H_ 13 14 #include <list> 15 16 #include "webrtc/base/constructormagic.h" 17 #include "webrtc/modules/interface/module.h" 18 #include "webrtc/system_wrappers/interface/scoped_ptr.h" 19 20 namespace webrtc { 21 22 class CallStatsObserver; 23 class CriticalSectionWrapper; 24 class RtcpRttStats; 25 26 // CallStats keeps track of statistics for a call. 27 class CallStats : public Module { 28 public: 29 friend class RtcpObserver; 30 31 CallStats(); 32 ~CallStats(); 33 34 // Implements Module, to use the process thread. 35 virtual int32_t TimeUntilNextProcess(); 36 virtual int32_t Process(); 37 38 // Returns a RtcpRttStats to register at a statistics provider. The object 39 // has the same lifetime as the CallStats instance. 40 RtcpRttStats* rtcp_rtt_stats() const; 41 42 // Registers/deregisters a new observer to receive statistics updates. 43 void RegisterStatsObserver(CallStatsObserver* observer); 44 void DeregisterStatsObserver(CallStatsObserver* observer); 45 46 protected: 47 void OnRttUpdate(uint32_t rtt); 48 49 uint32_t last_processed_rtt_ms() const; 50 51 private: 52 // Helper struct keeping track of the time a rtt value is reported. 53 struct RttTime { 54 RttTime(uint32_t new_rtt, int64_t rtt_time) 55 : rtt(new_rtt), time(rtt_time) {} 56 const uint32_t rtt; 57 const int64_t time; 58 }; 59 60 // Protecting all members. 61 scoped_ptr<CriticalSectionWrapper> crit_; 62 // Observer receiving statistics updates. 63 scoped_ptr<RtcpRttStats> rtcp_rtt_stats_; 64 // The last time 'Process' resulted in statistic update. 65 int64_t last_process_time_; 66 // The last RTT in the statistics update (zero if there is no valid estimate). 67 uint32_t last_processed_rtt_ms_; 68 69 // All Rtt reports within valid time interval, oldest first. 70 std::list<RttTime> reports_; 71 72 // Observers getting stats reports. 73 std::list<CallStatsObserver*> observers_; 74 75 DISALLOW_COPY_AND_ASSIGN(CallStats); 76 }; 77 78 } // namespace webrtc 79 80 #endif // WEBRTC_VIDEO_ENGINE_CALL_STATS_H_ 81
