NED File src/inet/applications/voip/SimpleVoipSender.ned
Name | Type | Description |
---|---|---|
SimpleVoipSender | simple module |
Implements a simple VoIP source. It is a constant bitrate source, with talkspurt support added. Packets do not contain actual voice data. Connection setup/teardown is not modelled. The peer must be a SimpleVoipReceiver. |
Source code
// // Copyright (C) 2011 Adriano (University of Pisa) // Copyright (C) 2012 OpenSim Ltd. // // SPDX-License-Identifier: LGPL-3.0-or-later // package inet.applications.voip; import inet.applications.contract.IApp; // // Implements a simple VoIP source. It is a constant bitrate source, with // talkspurt support added. Packets do not contain actual voice data. // Connection setup/teardown is not modelled. The peer must be a // ~SimpleVoipReceiver. // // The source alternates between two states: talk and silence. The length // the module spends in each state are controlled by the talkspurtDuration and // silenceDuration parameters. In talk state, the module acts as a CBR source, // and sends packets of size talkPacketSize every packetizationInterval seconds // to the destination over UDP. Silence is implicit: in silence state, no packets // are sent, and there is no explicit signalling of silence either. // // Packets are of type SimpleVoipPacket. In addition to packet ID and timestamp, // packets also contain a talkspurt ID and the total number of packets in the // talkspurt to facilitate statistics at the receiver side. (It allows the receiver // to detect loss of packets at the end of a talkspurt; a full talkspurt can still // be lost unnoticed.) // // The destination address/port, the local port, start and stop times can be // set via parameters. // // @author: Adriano // simple SimpleVoipSender like IApp { parameters: int localPort = default(-1); int destPort; string destAddress; int talkPacketSize @unit(B) = default(40B); // size of talk packets in bytes volatile double talkspurtDuration @unit(s) = default(weibull(1.423s, 0.824s)); volatile double silenceDuration @unit(s) = default(weibull(0.899s, 1.089s)); double packetizationInterval @unit(s) = default(20ms); // interval between sending voice packets double startTime @unit(s) = default(0s); // time of start sending double stopTime @unit(s) = default(-1s); // time of end of sending, -1 means forever @display("i=block/source"); gates: input socketIn @labels(UdpControlInfo/up); output socketOut @labels(UdpControlInfo/down); }