#include <ServerMediaSession.hh>
Inheritance diagram for ServerMediaSubsession:


Public Member Functions | |
| virtual | ~ServerMediaSubsession () |
| unsigned | trackNumber () const |
| char const * | trackId () |
| virtual char const * | sdpLines ()=0 |
| virtual void | getStreamParameters (unsigned clientSessionId, netAddressBits clientAddress, Port const &clientRTPPort, Port const &clientRTCPPort, int tcpSocketNum, unsigned char rtpChannelId, unsigned char rtcpChannelId, netAddressBits &destinationAddress, u_int8_t &destinationTTL, Boolean &isMulticast, Port &serverRTPPort, Port &serverRTCPPort, void *&streamToken)=0 |
| virtual void | startStream (unsigned clientSessionId, void *streamToken, TaskFunc *rtcpRRHandler, void *rtcpRRHandlerClientData, unsigned short &rtpSeqNum, unsigned &rtpTimestamp)=0 |
| virtual void | pauseStream (unsigned clientSessionId, void *streamToken) |
| virtual void | seekStream (unsigned clientSessionId, void *streamToken, float seekNPT) |
| virtual void | setStreamScale (unsigned clientSessionId, void *streamToken, float scale) |
| virtual void | deleteStream (unsigned clientSessionId, void *&streamToken) |
| virtual void | testScaleFactor (float &scale) |
| virtual float | duration () const |
| void | setServerAddressAndPortForSDP (netAddressBits addressBits, portNumBits portBits) |
| UsageEnvironment & | envir () const |
| char const * | name () const |
| virtual Boolean | isSource () const |
| virtual Boolean | isSink () const |
| virtual Boolean | isRTCPInstance () const |
| virtual Boolean | isRTSPClient () const |
| virtual Boolean | isRTSPServer () const |
| virtual Boolean | isMediaSession () const |
| virtual Boolean | isServerMediaSession () const |
| virtual Boolean | isDarwinInjector () const |
Static Public Member Functions | |
| static Boolean | lookupByName (UsageEnvironment &env, char const *mediumName, Medium *&resultMedium) |
| static void | close (UsageEnvironment &env, char const *mediumName) |
| static void | close (Medium *medium) |
Protected Member Functions | |
| ServerMediaSubsession (UsageEnvironment &env) | |
| char const * | rangeSDPLine () const |
| TaskToken & | nextTask () |
Protected Attributes | |
| ServerMediaSession * | fParentSession |
| netAddressBits | fServerAddressForSDP |
| portNumBits | fPortNumForSDP |
Private Attributes | |
| ServerMediaSubsession * | fNext |
| unsigned | fTrackNumber |
| char const * | fTrackId |
Friends | |
| class | ServerMediaSession |
| class | ServerMediaSubsessionIterator |
Definition at line 111 of file ServerMediaSession.hh.
| ServerMediaSubsession::~ServerMediaSubsession | ( | ) | [virtual] |
Definition at line 321 of file ServerMediaSession.cpp.
References Medium::close(), fNext, and fTrackId.
00321 { 00322 delete[] (char*)fTrackId; 00323 Medium::close(fNext); 00324 }
| ServerMediaSubsession::ServerMediaSubsession | ( | UsageEnvironment & | env | ) | [protected] |
Definition at line 315 of file ServerMediaSession.cpp.
00316 : Medium(env), 00317 fParentSession(NULL), fServerAddressForSDP(0), fPortNumForSDP(0), 00318 fNext(NULL), fTrackNumber(0), fTrackId(NULL) { 00319 }
| unsigned ServerMediaSubsession::trackNumber | ( | ) | const [inline] |
Definition at line 115 of file ServerMediaSession.hh.
References fTrackNumber.
Referenced by OnDemandServerMediaSubsession::getStreamParameters(), and OnDemandServerMediaSubsession::sdpLines().
00115 { return fTrackNumber; }
| char const * ServerMediaSubsession::trackId | ( | ) |
Definition at line 326 of file ServerMediaSession.cpp.
References fTrackId, fTrackNumber, NULL, and strDup().
Referenced by PassiveServerMediaSubsession::sdpLines(), and OnDemandServerMediaSubsession::setSDPLinesFromRTPSink().
00326 { 00327 if (fTrackNumber == 0) return NULL; // not yet in a ServerMediaSession 00328 00329 if (fTrackId == NULL) { 00330 char buf[100]; 00331 sprintf(buf, "track%d", fTrackNumber); 00332 fTrackId = strDup(buf); 00333 } 00334 return fTrackId; 00335 }
| virtual char const* ServerMediaSubsession::sdpLines | ( | ) | [pure virtual] |
Implemented in OnDemandServerMediaSubsession, and PassiveServerMediaSubsession.
| virtual void ServerMediaSubsession::getStreamParameters | ( | unsigned | clientSessionId, | |
| netAddressBits | clientAddress, | |||
| Port const & | clientRTPPort, | |||
| Port const & | clientRTCPPort, | |||
| int | tcpSocketNum, | |||
| unsigned char | rtpChannelId, | |||
| unsigned char | rtcpChannelId, | |||
| netAddressBits & | destinationAddress, | |||
| u_int8_t & | destinationTTL, | |||
| Boolean & | isMulticast, | |||
| Port & | serverRTPPort, | |||
| Port & | serverRTCPPort, | |||
| void *& | streamToken | |||
| ) | [pure virtual] |
Implemented in OnDemandServerMediaSubsession, and PassiveServerMediaSubsession.
| virtual void ServerMediaSubsession::startStream | ( | unsigned | clientSessionId, | |
| void * | streamToken, | |||
| TaskFunc * | rtcpRRHandler, | |||
| void * | rtcpRRHandlerClientData, | |||
| unsigned short & | rtpSeqNum, | |||
| unsigned & | rtpTimestamp | |||
| ) | [pure virtual] |
Implemented in MPEG2TransportFileServerMediaSubsession, OnDemandServerMediaSubsession, and PassiveServerMediaSubsession.
| void ServerMediaSubsession::pauseStream | ( | unsigned | clientSessionId, | |
| void * | streamToken | |||
| ) | [virtual] |
Reimplemented in MPEG2TransportFileServerMediaSubsession, and OnDemandServerMediaSubsession.
Definition at line 337 of file ServerMediaSession.cpp.
| void ServerMediaSubsession::seekStream | ( | unsigned | clientSessionId, | |
| void * | streamToken, | |||
| float | seekNPT | |||
| ) | [virtual] |
Reimplemented in MPEG2TransportFileServerMediaSubsession, and OnDemandServerMediaSubsession.
Definition at line 341 of file ServerMediaSession.cpp.
| void ServerMediaSubsession::setStreamScale | ( | unsigned | clientSessionId, | |
| void * | streamToken, | |||
| float | scale | |||
| ) | [virtual] |
Reimplemented in MPEG2TransportFileServerMediaSubsession, and OnDemandServerMediaSubsession.
Definition at line 345 of file ServerMediaSession.cpp.
| void ServerMediaSubsession::deleteStream | ( | unsigned | clientSessionId, | |
| void *& | streamToken | |||
| ) | [virtual] |
Reimplemented in MPEG2TransportFileServerMediaSubsession, and OnDemandServerMediaSubsession.
Definition at line 349 of file ServerMediaSession.cpp.
| void ServerMediaSubsession::testScaleFactor | ( | float & | scale | ) | [virtual] |
Reimplemented in MP3AudioFileServerMediaSubsession, MPEG2TransportFileServerMediaSubsession, and WAVAudioFileServerMediaSubsession.
Definition at line 354 of file ServerMediaSession.cpp.
00354 { 00355 // default implementation: Support scale = 1 only 00356 scale = 1; 00357 }
| float ServerMediaSubsession::duration | ( | ) | const [virtual] |
Reimplemented in MP3AudioFileServerMediaSubsession, MPEG1or2DemuxedServerMediaSubsession, MPEG2TransportFileServerMediaSubsession, and WAVAudioFileServerMediaSubsession.
Definition at line 359 of file ServerMediaSession.cpp.
Referenced by rangeSDPLine().
| void ServerMediaSubsession::setServerAddressAndPortForSDP | ( | netAddressBits | addressBits, | |
| portNumBits | portBits | |||
| ) |
Definition at line 364 of file ServerMediaSession.cpp.
References fPortNumForSDP, and fServerAddressForSDP.
00365 { 00366 fServerAddressForSDP = addressBits; 00367 fPortNumForSDP = portBits; 00368 }
| char const * ServerMediaSubsession::rangeSDPLine | ( | ) | const [protected] |
Definition at line 371 of file ServerMediaSession.cpp.
References duration(), ServerMediaSession::duration(), fParentSession, NULL, and strDup().
Referenced by PassiveServerMediaSubsession::sdpLines(), and OnDemandServerMediaSubsession::setSDPLinesFromRTPSink().
00371 { 00372 if (fParentSession == NULL) return NULL; 00373 00374 // If all of our parent's subsessions have the same duration 00375 // (as indicated by "fParentSession->duration() >= 0"), there's no "a=range:" line: 00376 if (fParentSession->duration() >= 0.0) return strDup(""); 00377 00378 // Use our own duration for a "a=range:" line: 00379 float ourDuration = duration(); 00380 if (ourDuration == 0.0) { 00381 return strDup("a=range:npt=0-\r\n"); 00382 } else { 00383 char buf[100]; 00384 sprintf(buf, "a=range:npt=0-%.3f\r\n", ourDuration); 00385 return strDup(buf); 00386 } 00387 }
| Boolean Medium::lookupByName | ( | UsageEnvironment & | env, | |
| char const * | mediumName, | |||
| Medium *& | resultMedium | |||
| ) | [static, inherited] |
Definition at line 65 of file Media.cpp.
References env, False, MediaLookupTable::lookup(), NULL, MediaLookupTable::ourMedia(), UsageEnvironment::setResultMsg(), and True.
Referenced by ServerMediaSession::lookupByName(), RTSPServer::lookupByName(), RTSPClient::lookupByName(), RTCPInstance::lookupByName(), MediaSource::lookupByName(), MediaSink::lookupByName(), MediaSession::lookupByName(), and DarwinInjector::lookupByName().
00066 { 00067 resultMedium = MediaLookupTable::ourMedia(env)->lookup(mediumName); 00068 if (resultMedium == NULL) { 00069 env.setResultMsg("Medium ", mediumName, " does not exist"); 00070 return False; 00071 } 00072 00073 return True; 00074 }
| void Medium::close | ( | UsageEnvironment & | env, | |
| char const * | mediumName | |||
| ) | [static, inherited] |
Definition at line 76 of file Media.cpp.
References env, MediaLookupTable::ourMedia(), and MediaLookupTable::remove().
Referenced by afterPlaying(), Medium::close(), closeMediaSinks(), OnDemandServerMediaSubsession::closeStreamSource(), WAVAudioFileSource::createNew(), QCELPAudioRTPSource::createNew(), MP3HTTPSource::createNew(), MP3FileSource::createNew(), AMRAudioRTPSource::createNew(), WAVAudioFileServerMediaSubsession::createNewStreamSource(), MPEG1or2DemuxedServerMediaSubsession::createNewStreamSource(), MediaSubsession::deInitiate(), MediaSubsession::initiate(), MPEG1or2ProgramStreamFileDuration(), MPEG1or2Demux::noteElementaryStreamDeletion(), ByteStreamMultiFileSource::onSourceClosure1(), StreamState::reclaim(), RTSPServer::removeServerMediaSession(), OnDemandServerMediaSubsession::sdpLines(), shutdown(), H264VideoRTPSink::stopPlaying(), subsessionAfterPlaying(), ClientTrickPlayState::updateStateOnScaleChange(), AMRDeinterleaver::~AMRDeinterleaver(), ByteStreamMultiFileSource::~ByteStreamMultiFileSource(), DarwinInjector::~DarwinInjector(), FramedFilter::~FramedFilter(), H264VideoRTPSink::~H264VideoRTPSink(), InputESSourceRecord::~InputESSourceRecord(), MPEG1or2Demux::~MPEG1or2Demux(), MPEG1or2FileServerDemux::~MPEG1or2FileServerDemux(), MPEG2TransportFileServerMediaSubsession::~MPEG2TransportFileServerMediaSubsession(), MPEG2TransportStreamFromPESSource::~MPEG2TransportStreamFromPESSource(), ServerMediaSession::~ServerMediaSession(), and ~ServerMediaSubsession().
00076 { 00077 MediaLookupTable::ourMedia(env)->remove(name); 00078 }
| void Medium::close | ( | Medium * | medium | ) | [static, inherited] |
Definition at line 80 of file Media.cpp.
References Medium::close(), Medium::envir(), Medium::name(), and NULL.
00080 { 00081 if (medium == NULL) return; 00082 00083 close(medium->envir(), medium->name()); 00084 }
| UsageEnvironment& Medium::envir | ( | ) | const [inline, inherited] |
Definition at line 59 of file Media.hh.
References Medium::fEnviron.
Referenced by QuickTimeFileSink::addArbitraryString(), FileSink::addData(), MPEG2IFrameIndexFromTransportStream::addToTail(), StreamParser::afterGettingBytes(), MultiFramedRTPSink::afterGettingFrame1(), InputESSourceRecord::afterGettingFrame1(), MPEG2TransportStreamFramer::afterGettingFrame1(), MPEG2IFrameIndexFromTransportStream::afterGettingFrame1(), HTTPSink::afterGettingFrame1(), BasicUDPSink::afterGettingFrame1(), MPEG4VideoFileServerMediaSubsession::afterPlayingDummy1(), MPEG4VideoStreamParser::analyzeVOLHeader(), RTSPClient::announceSDPDescription(), announceStream(), MPEG4VideoFileServerMediaSubsession::checkForAuxSDPLine1(), Medium::close(), MPEG2IFrameIndexFromTransportStream::compactParseBuffer(), QuickTimeFileSink::continuePlaying(), HTTPSink::continuePlaying(), H264VideoRTPSink::continuePlaying(), AVIFileSink::continuePlaying(), MPEG4VideoFileServerMediaSubsession::createNewRTPSink(), MPEG2TransportFileServerMediaSubsession::createNewRTPSink(), MPEG1or2VideoFileServerMediaSubsession::createNewRTPSink(), MPEG1or2DemuxedServerMediaSubsession::createNewRTPSink(), H263plusVideoFileServerMediaSubsession::createNewRTPSink(), AMRAudioFileServerMediaSubsession::createNewRTPSink(), ADTSAudioFileServerMediaSubsession::createNewRTPSink(), MPEG4VideoFileServerMediaSubsession::createNewStreamSource(), MPEG2TransportFileServerMediaSubsession::createNewStreamSource(), MPEG1or2VideoFileServerMediaSubsession::createNewStreamSource(), MPEG1or2DemuxedServerMediaSubsession::createNewStreamSource(), H263plusVideoFileServerMediaSubsession::createNewStreamSource(), AMRAudioFileServerMediaSubsession::createNewStreamSource(), ADTSAudioFileServerMediaSubsession::createNewStreamSource(), MPEG2IFrameIndexFromTransportStream::deliverIndexRecord(), SegmentQueue::dequeue(), RTSPClient::describeURL(), WAVAudioFileSource::doGetNextFrame(), MPEG2IFrameIndexFromTransportStream::doGetNextFrame(), MP3FileSource::doGetNextFrame(), H264FUAFragmenter::doGetNextFrame(), ByteStreamMultiFileSource::doGetNextFrame(), ByteStreamFileSource::doGetNextFrame(), BasicUDPSource::doGetNextFrame(), AMRAudioFileSource::doGetNextFrame(), ADTSAudioFileSource::doGetNextFrame(), MultiFramedRTPSource::doGetNextFrame1(), MP3FileSource::doGetNextFrame1(), ADUFromMP3Source::doGetNextFrame1(), SIPClient::doInviteStateMachine(), ByteStreamFileSource::doReadFromFile(), MPEG1or2VideoRTPSink::doSpecialFrameHandling(), MP3ADURTPSink::doSpecialFrameHandling(), H263plusVideoRTPSink::doSpecialFrameHandling(), ByteStreamFileSource::doStopGettingFrames(), BasicUDPSource::doStopGettingFrames(), SegmentQueue::enqueueNewSegment(), StreamParser::ensureValidBytes1(), MediaSubsession::env(), SubsessionIOState::envir(), RTSPServer::RTSPClientSession::envir(), RTSPOverHTTPServer::HTTPClientConnection::envir(), RTPInterface::envir(), AVISubsessionIOState::envir(), ServerMediaSession::generateSDPDescription(), RTPSource::getAttributes(), MP3FileSource::getAttributes(), MP3ADUTranscoder::getAttributes(), MediaSource::getAttributes(), MPEG4VideoFileServerMediaSubsession::getAuxSDPLine(), RTSPClient::getMediaSessionParameter(), getMPEG1or2TimeCode(), FramedSource::getNextFrame(), getOptionsResponse(), SIPClient::getResponse(), RTSPClient::getResponse(), RTSPClient::getResponse1(), SIPClient::getResponseCode(), getSDPDescriptionFromURL(), OnDemandServerMediaSubsession::getStreamParameters(), RTSPServer::incomingConnectionHandler1(), RTSPOverHTTPServer::incomingConnectionHandler1(), RTCPInstance::incomingReportHandler1(), RTSPClient::incomingRequestHandler1(), MP3FileSource::initializeStream(), MediaSession::initializeWithSDP(), MediaSession::initiateByMediaType(), SIPClient::invite1(), DynamicRTSPServer::lookupServerMediaSession(), MPEG4GenericRTPSource::MPEG4GenericRTPSource(), MPEG1or2FileServerDemux::newElementaryStream(), MPEG1or2Demux::newElementaryStream(), MPEG4GenericBufferedPacket::nextEnclosedFrameSize(), AMRBufferedPacket::nextEnclosedFrameSize(), RTSPClient::openConnectionFromURL(), MPEG2TransportStreamIndexFile::openFid(), MPEG2IFrameIndexFromTransportStream::parseFrame(), AC3AudioStreamParser::parseFrame(), RTSPClient::parseGetParameterHeader(), MPEGProgramStreamParser::parsePackHeader(), MPEGProgramStreamParser::parsePESPacket(), SIPClient::parseResponseCode(), RTSPClient::parseResponseCode(), MediaSession::parseSDPLine(), MPEG1or2VideoStreamParser::parseSlice(), MPEGProgramStreamParser::parseSystemHeader(), MPEG4VideoStreamParser::parseVideoObjectLayer(), MPEG4VideoStreamParser::parseVideoObjectPlane(), MPEG4VideoStreamParser::parseVisualObject(), RTSPClient::pauseMediaSession(), RTSPClient::pauseMediaSubsession(), RTSPClient::playMediaSession(), RTSPClient::playMediaSubsession(), AC3AudioRTPSource::processSpecialHeader(), SIPClient::processURL(), AC3AudioStreamParser::readAndSaveAFrame(), RTSPClient::recordMediaSubsession(), MPEG1or2Demux::registerReadInterest(), RTCPInstance::reschedule(), RTSPServer::rtspURLPrefix(), RTCPInstance::schedule(), OnDemandServerMediaSubsession::sdpLines(), SIPClient::sendACK(), SIPClient::sendBYE(), SIPClient::sendINVITE(), RTSPClient::sendOptionsCmd(), MultiFramedRTPSink::sendPacketIfNecessary(), SIPClient::sendRequest(), RTSPClient::sendRequest(), DarwinInjector::setDestination(), RTSPClient::setMediaSessionParameter(), RTSPClient::setupHTTPTunneling(), RTSPClient::setupMediaSubsession(), QuickTimeFileSink::setWord(), AVIFileSink::setWord(), SIPClient::SIPClient(), AMRAudioRTPSink::sourceIsCompatibleWithUs(), QuickTimeFileSink::startPlaying(), StreamState::startPlaying(), MediaSink::startPlaying(), AVIFileSink::startPlaying(), MediaSink::stopPlaying(), RTSPClient::teardownMediaSession(), RTSPClient::teardownMediaSubsession(), SIPClient::timerAHandler(), SIPClient::timerBHandler(), SIPClient::timerDHandler(), ClientTrickPlayState::updateStateOnScaleChange(), MPEG2TransportStreamFramer::updateTSPacketDurationEstimate(), BasicUDPSource::~BasicUDPSource(), ByteStreamFileSource::~ByteStreamFileSource(), RTSPOverHTTPServer::HTTPClientConnection::~HTTPClientConnection(), RTSPClient::~RTSPClient(), and RTSPServer::~RTSPServer().
00059 {return fEnviron;}
| char const* Medium::name | ( | ) | const [inline, inherited] |
Definition at line 61 of file Media.hh.
References Medium::fMediumName.
Referenced by QuickTimeFileSink::addAtom_hdlr2(), Medium::close(), MP3ADUTranscoder::createNew(), MP3FromADUSource::createNew(), ADUFromMP3Source::createNew(), and MP3FileSource::initializeStream().
00061 {return fMediumName;}
| Boolean Medium::isSource | ( | ) | const [virtual, inherited] |
Reimplemented in MediaSource.
Definition at line 86 of file Media.cpp.
References False.
Referenced by MediaSource::lookupByName().
00086 { 00087 return False; // default implementation 00088 }
| Boolean Medium::isSink | ( | ) | const [virtual, inherited] |
| Boolean Medium::isRTCPInstance | ( | ) | const [virtual, inherited] |
Reimplemented in RTCPInstance.
Definition at line 94 of file Media.cpp.
References False.
Referenced by RTCPInstance::lookupByName().
00094 { 00095 return False; // default implementation 00096 }
| Boolean Medium::isRTSPClient | ( | ) | const [virtual, inherited] |
Reimplemented in RTSPClient.
Definition at line 98 of file Media.cpp.
References False.
Referenced by RTSPClient::lookupByName().
00098 { 00099 return False; // default implementation 00100 }
| Boolean Medium::isRTSPServer | ( | ) | const [virtual, inherited] |
Reimplemented in RTSPServer.
Definition at line 102 of file Media.cpp.
References False.
Referenced by RTSPServer::lookupByName().
00102 { 00103 return False; // default implementation 00104 }
| Boolean Medium::isMediaSession | ( | ) | const [virtual, inherited] |
Reimplemented in MediaSession.
Definition at line 106 of file Media.cpp.
References False.
Referenced by MediaSession::lookupByName().
00106 { 00107 return False; // default implementation 00108 }
| Boolean Medium::isServerMediaSession | ( | ) | const [virtual, inherited] |
Reimplemented in ServerMediaSession.
Definition at line 110 of file Media.cpp.
References False.
Referenced by ServerMediaSession::lookupByName().
00110 { 00111 return False; // default implementation 00112 }
| Boolean Medium::isDarwinInjector | ( | ) | const [virtual, inherited] |
Reimplemented in DarwinInjector.
Definition at line 114 of file Media.cpp.
References False.
Referenced by DarwinInjector::lookupByName().
00114 { 00115 return False; // default implementation 00116 }
| TaskToken& Medium::nextTask | ( | ) | [inline, protected, inherited] |
Definition at line 77 of file Media.hh.
References Medium::fNextTask.
Referenced by BasicUDPSink::afterGettingFrame1(), MPEG4VideoFileServerMediaSubsession::afterPlayingDummy1(), MPEG4VideoFileServerMediaSubsession::checkForAuxSDPLine1(), WAVAudioFileSource::doGetNextFrame(), MP3FileSource::doGetNextFrame(), AMRAudioFileSource::doGetNextFrame(), ADTSAudioFileSource::doGetNextFrame(), MultiFramedRTPSource::doGetNextFrame1(), ByteStreamFileSource::doReadFromFile(), RTCPInstance::reschedule(), RTCPInstance::schedule(), MultiFramedRTPSink::sendPacketIfNecessary(), and MediaSink::stopPlaying().
00077 { 00078 return fNextTask; 00079 }
friend class ServerMediaSession [friend] |
Definition at line 163 of file ServerMediaSession.hh.
friend class ServerMediaSubsessionIterator [friend] |
Definition at line 164 of file ServerMediaSession.hh.
ServerMediaSession* ServerMediaSubsession::fParentSession [protected] |
Definition at line 159 of file ServerMediaSession.hh.
Referenced by OnDemandServerMediaSubsession::setSDPLinesFromRTPSink(), and setServerAddressAndPortForSDP().
portNumBits ServerMediaSubsession::fPortNumForSDP [protected] |
Definition at line 160 of file ServerMediaSession.hh.
Referenced by OnDemandServerMediaSubsession::setSDPLinesFromRTPSink(), and setServerAddressAndPortForSDP().
Definition at line 165 of file ServerMediaSession.hh.
Referenced by ServerMediaSession::addSubsession(), ServerMediaSubsessionIterator::next(), and ~ServerMediaSubsession().
unsigned ServerMediaSubsession::fTrackNumber [private] |
char const* ServerMediaSubsession::fTrackId [private] |
Definition at line 168 of file ServerMediaSession.hh.
Referenced by trackId(), and ~ServerMediaSubsession().
1.5.2