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/*
* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef WEBRTC_VIDEO_CALL_STATS_H_
#define WEBRTC_VIDEO_CALL_STATS_H_
#include <list>
#include "webrtc/base/constructormagic.h"
#include "webrtc/base/scoped_ptr.h"
#include "webrtc/modules/include/module.h"
#include "webrtc/system_wrappers/include/clock.h"
namespace webrtc {
class CallStatsObserver;
class CriticalSectionWrapper;
class RtcpRttStats;
// CallStats keeps track of statistics for a call.
class CallStats : public Module {
public:
friend class RtcpObserver;
explicit CallStats(Clock* clock);
~CallStats();
// Implements Module, to use the process thread.
int64_t TimeUntilNextProcess() override;
int32_t Process() override;
// Returns a RtcpRttStats to register at a statistics provider. The object
// has the same lifetime as the CallStats instance.
RtcpRttStats* rtcp_rtt_stats() const;
// Registers/deregisters a new observer to receive statistics updates.
void RegisterStatsObserver(CallStatsObserver* observer);
void DeregisterStatsObserver(CallStatsObserver* observer);
// Helper struct keeping track of the time a rtt value is reported.
struct RttTime {
RttTime(int64_t new_rtt, int64_t rtt_time)
: rtt(new_rtt), time(rtt_time) {}
const int64_t rtt;
const int64_t time;
};
protected:
void OnRttUpdate(int64_t rtt);
int64_t avg_rtt_ms() const;
private:
Clock* const clock_;
// Protecting all members.
rtc::scoped_ptr<CriticalSectionWrapper> crit_;
// Observer receiving statistics updates.
rtc::scoped_ptr<RtcpRttStats> rtcp_rtt_stats_;
// The last time 'Process' resulted in statistic update.
int64_t last_process_time_;
// The last RTT in the statistics update (zero if there is no valid estimate).
int64_t max_rtt_ms_;
int64_t avg_rtt_ms_;
// All Rtt reports within valid time interval, oldest first.
std::list<RttTime> reports_;
// Observers getting stats reports.
std::list<CallStatsObserver*> observers_;
RTC_DISALLOW_COPY_AND_ASSIGN(CallStats);
};
} // namespace webrtc
#endif // WEBRTC_VIDEO_CALL_STATS_H_
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