- comment jitter calculation

src/libs/jrtplib/src/rtpsession.h

@@ -49,6 +49,7 @@
 #include "rtptimeutilities.h"
 #include "rtcpcompoundpacketbuilder.h"
 #include "rtpmemoryobject.h"
+#include "rtpsourcedata.h"
 #include <list>
 
 #ifdef RTP_SUPPORT_THREAD
@@ -476,11 +477,7 @@ protected:
 	                              const uint8_t *cname,size_t cnamelength)				{ }
 
 	/** Is called when a new entry \c srcdat is added to the source table. */
-    virtual void OnNewSource(RTPSourceData *srcdat)
-    {
-        // Sync timestamp unit
-        srcdat->SetTimestampUnit(timestampunit);
-    }
+    virtual void OnNewSource(RTPSourceData *srcdat)                         { }
 
 	/** Is called when the entry \c srcdat is about to be deleted from the source table. */
 	virtual void OnRemoveSource(RTPSourceData *srcdat)						{ }
@@ -513,6 +510,10 @@ protected:
 
 	/** Is called when an RTCP compound packet has just been sent (useful to inspect outgoing RTCP data). */
 	virtual void OnSendRTCPCompoundPacket(RTCPCompoundPacket *pack)					{ }
+
+    virtual void OnSenderReport(RTPSourceData* srcdat) {}
+    virtual void OnReceiverReport(RTPSourceData* srcdat) {}
+
 #ifdef RTP_SUPPORT_THREAD
 	/** Is called when error \c errcode was detected in the poll thread. */
 	virtual void OnPollThreadError(int errcode)							{ }

src/libs/jrtplib/src/rtpsessionsources.cpp

@@ -110,5 +110,15 @@ void RTPSessionSources::OnNoteTimeout(RTPSourceData *srcdat)
 	rtpsession.OnNoteTimeout(srcdat);
 }
 
+void RTPSessionSources::OnSenderReport(RTPSourceData *srcdat)
+{
+    rtpsession.OnSenderReport(srcdat);
+}
+
+void RTPSessionSources::OnReceiverReport(RTPSourceData *srcdat)
+{
+    rtpsession.OnReceiverReport(srcdat);
+}
+
 } // end namespace
 

src/libs/jrtplib/src/rtpsessionsources.h

@@ -74,6 +74,8 @@ private:
 	void OnUnknownPacketFormat(RTCPPacket *rtcppack,const RTPTime &receivetime,
 	                           const RTPAddress *senderaddress);
 	void OnNoteTimeout(RTPSourceData *srcdat);
+    void OnSenderReport(RTPSourceData* srcdat);
+    void OnReceiverReport(RTPSourceData* srcdat);
 
 	RTPSession &rtpsession;
 	bool owncollision;

src/libs/jrtplib/src/rtpsourcedata.cpp

@@ -43,6 +43,9 @@
 #include <string>
 #endif // RTPDEBUG
 
+#include <iostream>
+#include <iomanip>
+
 #include "rtpdebug.h"
 
 #define ACCEPTPACKETCODE									\
@@ -197,16 +200,19 @@ void RTPSourceStats::ProcessPacket(RTPPacket *pack,const RTPTime &receivetime,do
             djitter += diff;
             jitter = (uint32_t)djitter;
 #else
+            // Current packet receive time
             RTPTime curtime = receivetime;
             double diffts1,diffts2,diff;
+
+            // Packet timestamp in units
             uint32_t curts = pack->GetTimestamp();
 
-            curtime -= prevpacktime;
-            diffts1 = curtime.GetDouble() / tsunit;
+            curtime -= prevpacktime; // Difference in RTPTime (seconds)
+            diffts1 = curtime.GetDouble() / tsunit;   // Current time in units
 
-            if (curts > prevtimestamp)
+            if (curts > prevtimestamp) // If packets are ordered ok
             {
-                uint32_t unsigneddiff = curts - prevtimestamp;
+                uint32_t unsigneddiff = curts - prevtimestamp; // Difference in units
 
                 if (unsigneddiff < 0x10000000) // okay, curts realy is larger than prevtimestamp
                     diffts2 = (double)unsigneddiff;
@@ -235,13 +241,17 @@ void RTPSourceStats::ProcessPacket(RTPPacket *pack,const RTPTime &receivetime,do
             else
                 diffts2 = 0;
 
-            diff = diffts1 - diffts2;
+            diff = diffts1 - diffts2; // diffts1 is delta between packets in receive time; difftw2 is delta in timestamp. Both are expressed in units.
             if (diff < 0)
-                diff = -diff;
-            diff -= djitter;
-            diff /= 16.0;
-            djitter += diff;
-            jitter = (uint32_t)djitter;
+                diff = -diff; // Get abs() if needed
+
+            djitter = djitter + (diff - djitter) / 16.0;
+            // std::cout << std::setprecision(3) << djitter << std::endl;
+            // diff -= djitter;
+            // diff /= 16.0;
+            // djitter += diff;
+
+            jitter = (uint32_t)djitter; // This is timestamp units !
 #endif
         }
         else

src/libs/jrtplib/src/rtpsources.cpp

@@ -659,6 +659,7 @@ int RTPSources::ProcessRTCPSenderInfo(uint32_t ssrc,const RTPNTPTime &ntptime,ui
 	// Call the callback
 	if (created)
 		OnNewSource(srcdat);
+    OnSenderReport(srcdat);
 
 	return 0;
 }
@@ -683,6 +684,8 @@ int RTPSources::ProcessRTCPReportBlock(uint32_t ssrc,uint8_t fractionlost,int32_
 	if (created)
 		OnNewSource(srcdat);
 
+    OnReceiverReport(srcdat);
+
 	return 0;
 }
 

src/libs/jrtplib/src/rtpsources.h

@@ -340,6 +340,10 @@ protected:
 
     /** Is called when the SDES NOTE item for source \c srcdat has been timed out. */
     virtual void OnNoteTimeout(RTPSourceData * /*srcdat*/)															{ }
+
+    virtual void OnSenderReport(RTPSourceData* /*srcdat*/) {}
+    virtual void OnReceiverReport(RTPSourceData* /*srcdat*/) {}
+
 private:
     void ClearSourceList();
     int ObtainSourceDataInstance(uint32_t ssrc,RTPInternalSourceData **srcdat,bool *created);