UDPVideoStreamSvr Class Reference

#include <UDPVideoStreamSvr.h>

Inheritance diagram for UDPVideoStreamSvr:

List of all members.

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Detailed Description

Stream VBR video streams to clients.

Cooperates with UDPVideoStreamCli. UDPVideoStreamCli requests a stream and UDPVideoStreamSvr starts streaming to them. Capable of handling streaming to multiple clients.

Public Member Functions
	UDPVideoStreamSvr ()
virtual	~UDPVideoStreamSvr ()
Protected Types
typedef std::vector< VideoStreamData * >	VideoStreamVector
Protected Member Functions
void	processStreamRequest (cMessage *msg)
void	sendStreamData (cMessage *timer)
Overidden cSimpleModule functions
virtual void	initialize ()
virtual void	finish ()
virtual void	handleMessage (cMessage *msg)
Protected Attributes
VideoStreamVector	streamVector
int	serverPort
cPar *	waitInterval
cPar *	packetLen
cPar *	videoSize
unsigned int	numStreams
unsigned long	numPkSent
Classes
struct	VideoStreamData

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Member Typedef Documentation

typedef std::vector<VideoStreamData *> UDPVideoStreamSvr::VideoStreamVector [protected]

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Constructor & Destructor Documentation

UDPVideoStreamSvr::UDPVideoStreamSvr (   )

{ }

UDPVideoStreamSvr::~UDPVideoStreamSvr (   )  [virtual]

{ for (unsigned int i=0; i<streamVector.size(); i++) delete streamVector[i]; }

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Member Function Documentation

void UDPVideoStreamSvr::finish (   )  [protected, virtual]

{ recordScalar("streams served", numStreams); recordScalar("packets sent", numPkSent); }

void UDPVideoStreamSvr::handleMessage (  cMessage *  msg  )  [protected, virtual]

{ if (msg->isSelfMessage()) { // timer for a particular video stream expired, send packet sendStreamData(msg); } else { // start streaming processStreamRequest(msg); } }

void UDPVideoStreamSvr::initialize (   )  [protected, virtual]

{ waitInterval = &par("waitInterval"); packetLen = &par("packetLen"); videoSize = &par("videoSize"); serverPort = par("serverPort"); numStreams = 0; numPkSent = 0; WATCH_PTRVECTOR(streamVector); bindToPort(serverPort); }

void UDPVideoStreamSvr::processStreamRequest (  cMessage *  msg  )  [protected]

{ // register video stream... UDPControlInfo *ctrl = check_and_cast<UDPControlInfo *>(msg->controlInfo()); VideoStreamData *d = new VideoStreamData; d->clientAddr = ctrl->srcAddr(); d->clientPort = ctrl->srcPort(); d->videoSize = (*videoSize); d->bytesLeft = d->videoSize; d->numPkSent = 0; streamVector.push_back(d); cMessage *timer = new cMessage("VideoStreamTmr"); timer->setContextPointer(d); // ... then transmit first packet right away sendStreamData(timer); numStreams++; }

void UDPVideoStreamSvr::sendStreamData (  cMessage *  timer  )  [protected]

{ VideoStreamData *d = (VideoStreamData *) timer->contextPointer(); // generate and send a packet cMessage *pkt = new cMessage("VideoStrmPk"); int pktLen = (*packetLen); if (pktLen > d->bytesLeft) pktLen = d->bytesLeft; pkt->setByteLength(pktLen); sendToUDP(pkt, serverPort, d->clientAddr, d->clientPort); d->bytesLeft -= pktLen; d->numPkSent++; numPkSent++; // reschedule timer if there's bytes left to send if (d->bytesLeft!=0) { double interval = (*waitInterval); scheduleAt(simTime()+interval, timer); } else { delete timer; // TBD find VideoStreamData in streamVector and delete it } }

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Member Data Documentation

unsigned long UDPVideoStreamSvr::numPkSent [protected]

unsigned int UDPVideoStreamSvr::numStreams [protected]

cPar* UDPVideoStreamSvr::packetLen [protected]

int UDPVideoStreamSvr::serverPort [protected]

VideoStreamVector UDPVideoStreamSvr::streamVector [protected]

cPar* UDPVideoStreamSvr::videoSize [protected]

cPar* UDPVideoStreamSvr::waitInterval [protected]

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The documentation for this class was generated from the following files:

• UDPVideoStreamSvr.h
• UDPVideoStreamSvr.cc

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