UdpVideoStreamServer

Package: inet.applications.udpapp

UdpVideoStreamServer

simple module

Video stream server. To be used with UdpVideoStreamClient.

The server will wait for incoming "video streaming requests". When a request arrives, it draws a random video stream size using the videoSize parameter, and starts streaming to the client. During streaming, it will send UDP packets of size packetLen at every sendInterval, until videoSize is reached. The parameters packetLen and sendInterval can be set to constant values to create CBR traffic, or to random values (e.g. sendInterval=uniform(1e-6, 1.01e-6)) to accomodate jitter.

The server can serve several clients, and several streams per client.

Statistics:

reqStreamBytes: statistic of bytelength of requested video streams. packetSent: statistic of sent packets and sent bytes.

See also: UdpVideoStreamClient

UdpVideoStreamServer

Inheritance diagram

The following diagram shows inheritance relationships for this type. Unresolved types are missing from the diagram.

Parameters

Name Type Default value Description
localPort int

port to listen on

sendInterval double

interval between sending video stream packets

packetLen int

length of a video packet in bytes

videoSize int

length of full a video stream in bytes

stopOperationExtraTime double -1s

extra time after lifecycle stop operation finished

stopOperationTimeout double 2s

timeout value for lifecycle stop operation

Properties

Name Value Description
display i=block/app
lifecycleSupport

Gates

Name Direction Size Description
socketIn input
socketOut output

Signals

Name Type Unit
packetSent inet::Packet
reqStreamBytes long

Statistics

Name Title Source Record Unit Interpolation Mode
packetSent packets sent packetSent count, sum(packetBytes), vector(packetBytes) none
reqStreamBytes requested stream bytes count, sum, vector none

Source code

//
// Video stream server. To be used with ~UdpVideoStreamClient.
//
// The server will wait for incoming "video streaming requests".
// When a request arrives, it draws a random video stream size
// using the videoSize parameter, and starts streaming to the client.
// During streaming, it will send UDP packets of size packetLen at every
// sendInterval, until videoSize is reached. The parameters packetLen
// and sendInterval can be set to constant values to create CBR traffic,
// or to random values (e.g. sendInterval=uniform(1e-6, 1.01e-6)) to
// accomodate jitter.
//
// The server can serve several clients, and several streams per client.
//
// Statistics:
//
// reqStreamBytes: statistic of bytelength of requested video streams.
// packetSent: statistic of sent packets and sent bytes.
//
// @see ~UdpVideoStreamClient
//
simple UdpVideoStreamServer like IApp
{
    parameters:
        int localPort; // port to listen on
        volatile double sendInterval @unit(s); // interval between sending video stream packets
        volatile int packetLen @unit(B);  // length of a video packet in bytes
        volatile int videoSize @unit(B);  // length of full a video stream in bytes
        @display("i=block/app");
        @lifecycleSupport;
        double stopOperationExtraTime @unit(s) = default(-1s);    // extra time after lifecycle stop operation finished
        double stopOperationTimeout @unit(s) = default(2s);    // timeout value for lifecycle stop operation
        @signal[packetSent](type=inet::Packet);
        @signal[reqStreamBytes](type=long);
        @statistic[reqStreamBytes](title="requested stream bytes"; record=count,sum,vector; interpolationmode=none);
        @statistic[packetSent](title="packets sent"; source=packetSent; record=count,"sum(packetBytes)","vector(packetBytes)"; interpolationmode=none);
    gates:
        input socketIn @labels(UdpControlInfo/up);
        output socketOut @labels(UdpControlInfo/down);
}

File: src/inet/applications/udpapp/UdpVideoStreamServer.ned