live555 实现一个最简单的RTSP服务器

live555 实现一个最简单的RTSP服务器

用live555中的库写了一个最简单的RTSPServer程序，仅用于学习目的。从下例的代码中，可以清析的明白RTSPServer的函数调用流程。

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#include <BasicUsageEnvironment.hh>

#include "liveMedia.hh"

static ServerMediaSession* createNewSMS(UsageEnvironment& env, char const* fileName);

int main()

{

TaskScheduler* scheduler;

UsageEnvironment* env ;

RTSPServer* rtspServer;

ServerMediaSession* sms;

//创建任务调用器

scheduler = BasicTaskScheduler::createNew();

//创建交互环境

env = BasicUsageEnvironment::createNew(*scheduler);

//创建RTSP服务器

rtspServer = RTSPServer::createNew(*env,554); //使用554端口

if(rtspServer == NULL)

{

rtspServer = RTSPServer::createNew(*env,8554); //554端口被占用，就使用8554端口

}

//打印服务器地址

*env << "Play streams from this server using the URL\n\t"

<< rtspServer->rtspURLPrefix() << "<filename>.\n";

//创建session

sms = createNewSMS(*env, "test.mpg");

rtspServer->addServerMediaSession(sms);

//添加其它文件对应的session...

//进行事件循环

env->taskScheduler().doEventLoop(); // does not return

return 0;

}

static ServerMediaSession* createNewSMS(UsageEnvironment& env, char const* fileName)

{

char const* extension = strrchr(fileName, '.');

ServerMediaSession* sms = NULL;

Boolean reuseSource = False; //不重用source

sms = ServerMediaSession::createNew(env, fileName); //创建一个session

//

//在session中添加subssesion

//

if(strcmp(extension, ".aac") == 0)

{

sms->addSubsession(ADTSAudioFileServerMediaSubsession::createNew(env, fileName, reuseSource));

}

else if(strcmp(extension, ".264") == 0)

{

sms->addSubsession(H264VideoFileServerMediaSubsession::createNew(env, fileName, reuseSource));

}

else if(strcmp(extension, ".mpg") == 0)

{

MPEG1or2FileServerDemux* demux

= MPEG1or2FileServerDemux::createNew(env, fileName, reuseSource);

sms->addSubsession(demux->newVideoServerMediaSubsession());

sms->addSubsession(demux->newAudioServerMediaSubsession());

}

//添加其它媒体格式支持...

return sms;

}