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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/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_ENGINE_CALL_STATS_H_ | |
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