- report packet loss timeline

src/engine/media/MT_AudioReceiver.cpp

@@ -224,11 +224,6 @@ RtpBuffer::FetchResult RtpBuffer::fetch(ResultList& rl)
     }
     else
     {
-        // Did we fetch any packet before ?
-        bool is_fetched_packet = mFetchedPacket.get() != nullptr;
-        if (is_fetched_packet)
-            is_fetched_packet &= mFetchedPacket->rtp().get() != nullptr;
-
         if (mLastSeqno.has_value())
         {
             if (mPacketList.empty())
@@ -239,7 +234,8 @@ RtpBuffer::FetchResult RtpBuffer::fetch(ResultList& rl)
             else
             {
                 // Current sequence number ?
-                uint32_t seqno = mPacketList.front()->rtp()->GetExtendedSequenceNumber();
+                auto& packet = *mPacketList.front();
+                uint32_t seqno = packet.rtp()->GetExtendedSequenceNumber();
 
                 // Gap between new packet and previous on
                 int gap = (int64_t)seqno - (int64_t)*mLastSeqno - 1;
@@ -248,7 +244,8 @@ RtpBuffer::FetchResult RtpBuffer::fetch(ResultList& rl)
                 {
                     // std::cout << "Increase the packet loss for SSRC " << std::hex << mSsrc << std::endl;
                     mStat.mPacketLoss++;
-                    //mStat.mLoss[gap]++;
+                    auto currentTimestamp = uint64_t(packet.rtp()->GetReceiveTime().GetDouble() * 1000000);
+                    mStat.mPacketLossTimeline.push_back({gap, std::chrono::microseconds(currentTimestamp)});
                     mLastSeqno = *mLastSeqno + 1;
                     result = FetchResult::Gap;
                 }

src/engine/media/MT_AudioReceiver.h

@@ -18,6 +18,8 @@
 #include "../audio/Audio_Resampler.h"
 
 #include <optional>
+#include <chrono>
+using namespace std::chrono_literals;
 
 namespace MT
 {
@@ -45,10 +47,15 @@ namespace MT
         const std::vector<short>& pcm() const;
         std::vector<short>& pcm();
 
+        const std::chrono::microseconds& timestamp() const;
+        std::chrono::microseconds& timestamp();
+
     protected:
         std::shared_ptr<RTPPacket> mRtp;
-      int mTimelength = 0, mRate = 0;
+        int mTimelength = 0,
+            mRate = 0;
         std::vector<short> mPcm;
+        std::chrono::microseconds mTimestamp = 0us;
     };
 
     RtpBuffer(Statistics& stat);

src/engine/media/MT_Statistics.h

@@ -50,6 +50,12 @@ protected:
     float                   mMaxDelta = 0.0f;
 };
 
+struct PacketLossEvent
+{
+    int mGap = 0;
+    std::chrono::microseconds mTimestamp;
+};
+
 class Statistics
 {
 public:
@@ -86,6 +92,8 @@ public:
 
     std::map<int, int>          mCodecCount;            // Stats on used codecs
 
+    std::vector<PacketLossEvent> mPacketLossTimeline;   // Packet loss timeline
+
     // It is to calculate network MOS
     void calculateBurstr(double* burstr, double* loss) const;
     double calculateMos(double maximalMos) const;