1 /*
2  *  Copyright (c) 2016 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_SEND_DELAY_STATS_H_
12 #define VIDEO_SEND_DELAY_STATS_H_
13 
14 #include <map>
15 #include <memory>
16 #include <set>
17 
18 #include "common_types.h"  // NOLINT(build/include)
19 #include "modules/include/module_common_types.h"
20 #include "rtc_base/criticalsection.h"
21 #include "rtc_base/thread_annotations.h"
22 #include "system_wrappers/include/clock.h"
23 #include "video/stats_counter.h"
24 #include "call/video_send_stream.h"
25 
26 namespace webrtc {
27 
28 class SendDelayStats : public SendPacketObserver {
29  public:
30   explicit SendDelayStats(Clock* clock);
31   virtual ~SendDelayStats();
32 
33   // Adds the configured ssrcs for the rtp streams.
34   // Stats will be calculated for these streams.
35   void AddSsrcs(const VideoSendStream::Config& config);
36 
37   // Called when a packet is sent (leaving socket).
38   bool OnSentPacket(int packet_id, int64_t time_ms);
39 
40  protected:
41   // From SendPacketObserver.
42   // Called when a packet is sent to the transport.
43   void OnSendPacket(uint16_t packet_id,
44                     int64_t capture_time_ms,
45                     uint32_t ssrc) override;
46 
47  private:
48   // Map holding sent packets (mapped by sequence number).
49   struct SequenceNumberOlderThan {
operatorSequenceNumberOlderThan50     bool operator()(uint16_t seq1, uint16_t seq2) const {
51       return IsNewerSequenceNumber(seq2, seq1);
52     }
53   };
54   struct Packet {
PacketPacket55     Packet(uint32_t ssrc, int64_t capture_time_ms, int64_t send_time_ms)
56         : ssrc(ssrc),
57           capture_time_ms(capture_time_ms),
58           send_time_ms(send_time_ms) {}
59     uint32_t ssrc;
60     int64_t capture_time_ms;
61     int64_t send_time_ms;
62   };
63   typedef std::map<uint16_t, Packet, SequenceNumberOlderThan> PacketMap;
64 
65   void UpdateHistograms();
66   void RemoveOld(int64_t now, PacketMap* packets)
67       RTC_EXCLUSIVE_LOCKS_REQUIRED(crit_);
68   AvgCounter* GetSendDelayCounter(uint32_t ssrc)
69       RTC_EXCLUSIVE_LOCKS_REQUIRED(crit_);
70 
71   Clock* const clock_;
72   rtc::CriticalSection crit_;
73 
74   PacketMap packets_ RTC_GUARDED_BY(crit_);
75   size_t num_old_packets_ RTC_GUARDED_BY(crit_);
76   size_t num_skipped_packets_ RTC_GUARDED_BY(crit_);
77 
78   std::set<uint32_t> ssrcs_ RTC_GUARDED_BY(crit_);
79 
80   // Mapped by SSRC.
81   std::map<uint32_t, std::unique_ptr<AvgCounter>> send_delay_counters_
82       RTC_GUARDED_BY(crit_);
83 };
84 
85 }  // namespace webrtc
86 #endif  // VIDEO_SEND_DELAY_STATS_H_
87