darwin在轉(zhuǎn)發(fā)流過程中對推送端斷開的處理問題 .

1、最近在做項目的過程中遇到一個問題，在用DarwinStreamingServer中的QTSSReflectModule模塊做為流轉(zhuǎn)發(fā)和分發(fā)服務(wù)，用live555的DarwinInject類做為模擬設(shè)備進行流推送時，如果按照正常RTSP推送流程:Announce、Setup、Play…、Teardown，Darwin能較好地完成流的轉(zhuǎn)發(fā)，但是假如設(shè)備在不正常工作，例如網(wǎng)絡(luò)異常斷開，設(shè)備斷電等中斷了數(shù)據(jù)流的推送，而缺少了服務(wù)器的Teardo

2、wn過程，這樣與此路推送相關(guān)的RTSPSession、RTPSession以及ReflectSession等都需要等到配置的“rtp_timeout”時間后、RTPSession超時才能析構(gòu)所有相關(guān)轉(zhuǎn)發(fā)對象。先分析下原因：RTSPSession在創(chuàng)建RTPSession時[cpp]viewplaincopyprint1.SetthecurrentRTSPsessionfthisRTPsession.2.Wedothisherebecau

3、seweneedtomakesuretheSessionMutex3.isgrabbedwhilewedothis.OnlydothisiftheRTSPsession4.isstillaliveofcourse.5.if(thisIsLiveSession())6.fRTPSessionUpdateRTSPSession(this)[cpp]viewplaincopyprint1.voidRTPSessionInterface::Up

4、dateRTSPSession(RTSPSessionInterfaceinNewRTSPSession)2.3.if(inNewRTSPSession!=fRTSPSession)4.5.Iftherewasanoldsessionletitknowthatwearedone6.if(fRTSPSession!=NULL)7.fRTSPSessionDecrementObjectHolderCount()8.9.Incrementth

5、iscounttopreventtheRTSPsessionfrombeingd10.fRTSPSession=inNewRTSPSession3.thisCleanupRequest()4.5.6.Kill與RTSPSession相關(guān)的RTPSession7.if(!IsLiveSession())8.OSRefTabletheMap=QTSServerInterface::GetServer()GetRTPSessionMap()9

6、.OSReftheRef=theMapResolve(10.if(theRef!=NULL)11.fRTPSession=(RTPSession)theRefGetObject()12.if(fRTPSession)fRTPSessionTeardown()13.theMapRelease(fRTPSessionGetRef())14.fRTPSession=NULL15.16.17.Onlyifitisokto!18.if(fObje

7、ctHolders==0)return119.Ifweareherebecauseofatimeoutbutwecantbecausesomeone20.isholdingontoareferencetothissessionjustreschedulethetimeout.21.AtthispointhoweverthesessionisDEAD.22.return0注意thisCleanupRequest()在前這樣就能在RTSPS