[Linphone-users] meeting problem when using ortp with version of 0.13.1

[god lu]

Hi all,

      I am using ortp to send and receive audio packets bwtween my pc and developing board.  I have made oRTP work in schedule mode not in blocking mode, the code is:      

 

       mysession = rtp_session_new(RTP_SESSION_SENDRECV);

       rtp_session_set_scheduling_mode(mysession, 1);  

       rtp_session_set_blocking_mode(mysession, 0);

 

       rtp_session_enable_adaptive_jitter_compensation(mysession, TRUE);
       rtp_session_set_recv_buf_size(mysession,1024);
       rtp_session_set_local_addr(mysession, _localip, 10500);
       rtp_session_set_remote_addr(mysession, remote_sdp_audio_ip, remote_sdp_audio_port);
       rtp_session_set_payload_type(mysession, payload);  

 

      when receiving packets i use :

     SessionSet *recv_session_set;
     recv_session_set = session_set_new();
     session_set_set(recv_session_set, mysession);

    

     while(1)

     {

          ret = session_set_select(recv_session_set, NULL, NULL);
         if((ret != -1) && session_set_is_set(recv_session_set, mysession))
        {
              i = rtp_session_recv_with_ts(mysession, data_in, length, timestamp, &have_more);

              if (i > 0)

              {

                         // then i save the data_in to a file and do other things.

                        timestamp += i;

              }

            

         }

         // do other thins

   }

   when I send the packets I use rtp_session_send_with_ts( ) to send packets directly.  Both my board and pc work in the same way.

 

  And the problem is, when I speak  about 10s on the board side (i save my voice to a file), and the pc side receive about 8s of my voice ( i also save the packets received to a file). 

  According to reading the source code, I know in schedule mode (the blocking mode is off), we can use session_set_select  to block the thread until the packet arrives, then we can use rtp_session_recv_with_ts to receive packets.

  But now, obviously there are some packets lost.  In my program the packet size is 320, and the timestamp is incresed by 320.  

 

  Would anyone please give me some advice to solve this problem? 

  

   Any other care needs to be taken.?

   

  By the way, when I set both blocking mode and schedule mode on, there are more packets lost.

 

  Thank you in advance! 

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