Fix incorrect handling of rtpevent packet. In AmRtpStream, rtpevent

packets are treated the same as other RTP packets, they are all put into
a map with timestamp as key. However, some UA may use the same timestamp
for all rtpevent packets that represents a digit.

patch by Rui Jin Zheng rjzheng at boronetworks dot com



git-svn-id: http://svn.berlios.de/svnroot/repos/sems/trunk@1090 8eb893ce-cfd4-0310-b710-fb5ebe64c474

core/AmRtpStream.cpp

@@ -512,8 +512,12 @@ void AmRtpStream::bufferPacket(AmRtpPacket* p)
 
   receive_mut.lock();
   // free packet on double packet for TS received
-  if (receive_buf.find(p->timestamp) != receive_buf.end())
-    mem.freePacket(receive_buf[p->timestamp]);
+  if(!(telephone_event_pt.get() && 
+       (p->payload == telephone_event_pt->payload_type))) {
+    if (receive_buf.find(p->timestamp) != receive_buf.end()) {
+      mem.freePacket(receive_buf[p->timestamp]);
+    }
+  }  
 
 #ifdef WITH_ZRTP
   if (session->zrtp_audio) {
@@ -531,7 +535,12 @@ void AmRtpStream::bufferPacket(AmRtpPacket* p)
 	  ERROR("parsing decoded packet!\n");
 	  mem.freePacket(p);
 	} else {
-	  receive_buf[p->timestamp] = p;
+          if(telephone_event_pt.get() && 
+	     (p->payload == telephone_event_pt->payload_type)) {
+            rtp_ev_qu.push(p);
+          } else {
+	    receive_buf[p->timestamp] = p;
+          }
 	}
       }	break;
 
@@ -555,7 +564,14 @@ void AmRtpStream::bufferPacket(AmRtpPacket* p)
       }
   } else {
 #endif // WITH_ZRTP
-    receive_buf[p->timestamp] = p;
+
+    if(telephone_event_pt.get() && 
+       (p->payload == telephone_event_pt->payload_type)) {
+      rtp_ev_qu.push(p);
+    } else {
+      receive_buf[p->timestamp] = p;
+    }
+
 #ifdef WITH_ZRTP
   }
 #endif
@@ -587,6 +603,14 @@ int AmRtpStream::nextPacket(AmRtpPacket*& p)
     return RTP_TIMEOUT;
   }
 
+  if(!rtp_ev_qu.empty()) {
+    // first return RTP telephone event payloads
+    p = rtp_ev_qu.front();
+    rtp_ev_qu.pop();
+    receive_mut.unlock();
+    return 1;
+  }
+
   if(receive_buf.empty()){
     receive_mut.unlock();
     return RTP_EMPTY;

core/AmRtpStream.h

@@ -39,6 +39,7 @@
 
 #include <string>
 #include <map>
+#include <queue>
 #include <memory>
 using std::string;
 using std::auto_ptr;
@@ -58,7 +59,7 @@ class AmAudio;
 class AmSession;
 class SdpPayload;
 typedef std::map<unsigned int, AmRtpPacket*, ts_less> ReceiveBuffer;
-
+typedef std::queue<AmRtpPacket*>  RtpEventQueue;
 
 /**
  * This provides the memory for the receive buffer.
@@ -131,6 +132,7 @@ protected:
 
   PacketMem       mem;
   ReceiveBuffer   receive_buf;
+  RtpEventQueue   rtp_ev_qu;
   AmMutex         receive_mut;