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。

#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;}