MPEG1or2DemuxedServerMediaSubsession Class Reference

#include <MPEG1or2DemuxedServerMediaSubsession.hh>

Inheritance diagram for MPEG1or2DemuxedServerMediaSubsession:

[legend]Collaboration diagram for MPEG1or2DemuxedServerMediaSubsession:


Public Member Functions
unsigned	trackNumber () const
char const *	trackId ()
virtual void	testScaleFactor (float &scale)
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 MPEG1or2DemuxedServerMediaSubsession *	createNew (MPEG1or2FileServerDemux &demux, u_int8_t streamIdTag, Boolean reuseFirstSource, Boolean iFramesOnly=False, double vshPeriod=5.0)
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
virtual char const *	sdpLines ()
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)
virtual void	startStream (unsigned clientSessionId, void streamToken, TaskFunc rtcpRRHandler, void *rtcpRRHandlerClientData, unsigned short &rtpSeqNum, unsigned &rtpTimestamp)
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 char const *	getAuxSDPLine (RTPSink rtpSink, FramedSource inputSource)
virtual void	setStreamSourceScale (FramedSource *inputSource, float scale)
virtual void	closeStreamSource (FramedSource *inputSource)
char const *	rangeSDPLine () const
TaskToken &	nextTask ()
Protected Attributes
ServerMediaSession *	fParentSession
netAddressBits	fServerAddressForSDP
portNumBits	fPortNumForSDP
Private Member Functions
	MPEG1or2DemuxedServerMediaSubsession (MPEG1or2FileServerDemux &demux, u_int8_t streamIdTag, Boolean reuseFirstSource, Boolean iFramesOnly, double vshPeriod)
virtual	~MPEG1or2DemuxedServerMediaSubsession ()
virtual void	seekStreamSource (FramedSource *inputSource, float seekNPT)
virtual FramedSource *	createNewStreamSource (unsigned clientSessionId, unsigned &estBitrate)
virtual RTPSink *	createNewRTPSink (Groupsock rtpGroupsock, unsigned char rtpPayloadTypeIfDynamic, FramedSource inputSource)
virtual float	duration () const
Private Attributes
MPEG1or2FileServerDemux &	fOurDemux
u_int8_t	fStreamIdTag
Boolean	fIFramesOnly
double	fVSHPeriod

Detailed Description

Definition at line 32 of file MPEG1or2DemuxedServerMediaSubsession.hh.

Constructor & Destructor Documentation

MPEG1or2DemuxedServerMediaSubsession::MPEG1or2DemuxedServerMediaSubsession	(	MPEG1or2FileServerDemux &	demux,
		u_int8_t	streamIdTag,
		Boolean	reuseFirstSource,
		Boolean	iFramesOnly,
		double	vshPeriod
	)			`[private]`

Definition at line 40 of file MPEG1or2DemuxedServerMediaSubsession.cpp.

00043   : OnDemandServerMediaSubsession(demux.envir(), reuseFirstSource),
00044     fOurDemux(demux), fStreamIdTag(streamIdTag),
00045     fIFramesOnly(iFramesOnly), fVSHPeriod(vshPeriod) {
00046 }

MPEG1or2DemuxedServerMediaSubsession::~MPEG1or2DemuxedServerMediaSubsession ( ) [private, virtual]

Definition at line 48 of file MPEG1or2DemuxedServerMediaSubsession.cpp.

00048                                                                             {
00049 }

Member Function Documentation

MPEG1or2DemuxedServerMediaSubsession * MPEG1or2DemuxedServerMediaSubsession::createNew	(	MPEG1or2FileServerDemux &	demux,
		u_int8_t	streamIdTag,
		Boolean	reuseFirstSource,
		Boolean	iFramesOnly = `False`,
		double	vshPeriod = `5.0`
	)			`[static]`

Definition at line 32 of file MPEG1or2DemuxedServerMediaSubsession.cpp.

Referenced by MPEG1or2FileServerDemux::newAC3AudioServerMediaSubsession(), MPEG1or2FileServerDemux::newAudioServerMediaSubsession(), and MPEG1or2FileServerDemux::newVideoServerMediaSubsession().

00033                                                                              {
00034   return new MPEG1or2DemuxedServerMediaSubsession(demux, streamIdTag,
00035                                                   reuseFirstSource,
00036                                                   iFramesOnly, vshPeriod);
00037 }

void MPEG1or2DemuxedServerMediaSubsession::seekStreamSource	(	FramedSource *	inputSource,
		float	seekNPT
	)			`[private, virtual]`

Reimplemented from OnDemandServerMediaSubsession.

Definition at line 97 of file MPEG1or2DemuxedServerMediaSubsession.cpp.

References duration(), MPEG1or2FileServerDemux::fileSize(), MPEG1or2Demux::flushInput(), MPEGVideoStreamFramer::flushInput(), MPEG1or2AudioStreamFramer::flushInput(), fOurDemux, fStreamIdTag, MPEG1or2Demux::inputSource(), ByteStreamFileSource::seekToByteAbsolute(), size, and MPEG1or2DemuxedElementaryStream::sourceDemux().

00097                                                            {
00098   float const dur = duration();
00099   unsigned const size = fOurDemux.fileSize();
00100   unsigned absBytePosition = dur == 0.0 ? 0 : (unsigned)((seekNPT/dur)*size);
00101 
00102   // "inputSource" is a 'framer'
00103   // Flush its data, to account for the seek that we're about to do:
00104   if ((fStreamIdTag&0xF0) == 0xC0 /*MPEG audio*/) {
00105     MPEG1or2AudioStreamFramer* framer = (MPEG1or2AudioStreamFramer*)inputSource;
00106     framer->flushInput();
00107   } else if ((fStreamIdTag&0xF0) == 0xE0 /*video*/) {
00108     MPEG1or2VideoStreamFramer* framer = (MPEG1or2VideoStreamFramer*)inputSource;
00109     framer->flushInput();
00110   }
00111 
00112   // "inputSource" is a filter; its input source is the original elem stream source:
00113   MPEG1or2DemuxedElementaryStream* elemStreamSource
00114     = (MPEG1or2DemuxedElementaryStream*)(((FramedFilter*)inputSource)->inputSource());
00115 
00116   // Next, get the original source demux:
00117   MPEG1or2Demux& sourceDemux = elemStreamSource->sourceDemux();
00118 
00119   // and flush its input buffers:
00120   sourceDemux.flushInput();
00121 
00122   // Then, get the original input file stream from the source demux:
00123   ByteStreamFileSource* inputFileSource
00124     = (ByteStreamFileSource*)(sourceDemux.inputSource());
00125   // Note: We can make that cast, because we know that the demux was originally
00126   // created from a "ByteStreamFileSource".
00127 
00128   // Do the appropriate seek within the input file stream:
00129   inputFileSource->seekToByteAbsolute(absBytePosition);
00130 }

FramedSource * MPEG1or2DemuxedServerMediaSubsession::createNewStreamSource	(	unsigned	clientSessionId,
		unsigned &	estBitrate
	)			`[private, virtual]`

Implements OnDemandServerMediaSubsession.

Definition at line 52 of file MPEG1or2DemuxedServerMediaSubsession.cpp.

References Medium::close(), AC3AudioStreamFramer::createNew(), MPEG1or2VideoStreamFramer::createNew(), MPEG1or2AudioStreamFramer::createNew(), Medium::envir(), fIFramesOnly, fOurDemux, fStreamIdTag, fVSHPeriod, MPEG1or2FileServerDemux::newElementaryStream(), and NULL.

00052                                                                       {
00053   FramedSource* es = NULL;
00054   do {
00055     es = fOurDemux.newElementaryStream(clientSessionId, fStreamIdTag);
00056     if (es == NULL) break;
00057 
00058     if ((fStreamIdTag&0xF0) == 0xC0 /*MPEG audio*/) {
00059       estBitrate = 128; // kbps, estimate
00060       return MPEG1or2AudioStreamFramer::createNew(envir(), es);
00061     } else if ((fStreamIdTag&0xF0) == 0xE0 /*video*/) {
00062       estBitrate = 500; // kbps, estimate
00063       return MPEG1or2VideoStreamFramer::createNew(envir(), es,
00064                                                   fIFramesOnly, fVSHPeriod);
00065     } else if (fStreamIdTag == 0xBD /*AC-3 audio*/) {
00066       estBitrate = 192; // kbps, estimate
00067       return AC3AudioStreamFramer::createNew(envir(), es);
00068     } else { // unknown stream type
00069       break;
00070     }
00071   } while (0);
00072 
00073   // An error occurred:
00074   Medium::close(es);
00075   return NULL;
00076 }

RTPSink * MPEG1or2DemuxedServerMediaSubsession::createNewRTPSink	(	Groupsock *	rtpGroupsock,
		unsigned char	rtpPayloadTypeIfDynamic,
		FramedSource *	inputSource
	)			`[private, virtual]`

Implements OnDemandServerMediaSubsession.

Definition at line 79 of file MPEG1or2DemuxedServerMediaSubsession.cpp.

References audioSource, AC3AudioRTPSink::createNew(), MPEG1or2VideoRTPSink::createNew(), MPEG1or2AudioRTPSink::createNew(), Medium::envir(), fStreamIdTag, and NULL.

00080                                               {
00081   if ((fStreamIdTag&0xF0) == 0xC0 /*MPEG audio*/) {
00082     return MPEG1or2AudioRTPSink::createNew(envir(), rtpGroupsock);
00083   } else if ((fStreamIdTag&0xF0) == 0xE0 /*video*/) {
00084     return MPEG1or2VideoRTPSink::createNew(envir(), rtpGroupsock);
00085   } else if (fStreamIdTag == 0xBD /*AC-3 audio*/) {
00086     // Get the sampling frequency from the audio source; use it for the RTP frequency:
00087     AC3AudioStreamFramer* audioSource
00088       = (AC3AudioStreamFramer*)inputSource;
00089     return AC3AudioRTPSink::createNew(envir(), rtpGroupsock, rtpPayloadTypeIfDynamic,
00090                                       audioSource->samplingRate());
00091   } else {
00092     return NULL;
00093   }
00094 }

float MPEG1or2DemuxedServerMediaSubsession::duration ( ) const [private, virtual]

Reimplemented from ServerMediaSubsession.

Definition at line 132 of file MPEG1or2DemuxedServerMediaSubsession.cpp.

References MPEG1or2FileServerDemux::fileDuration(), and fOurDemux.

Referenced by seekStreamSource().

00132                                                            {
00133   return fOurDemux.fileDuration();
00134 }

char const * OnDemandServerMediaSubsession::sdpLines ( ) [protected, virtual, inherited]

Implements ServerMediaSubsession.

Definition at line 74 of file OnDemandServerMediaSubsession.cpp.

References Medium::close(), OnDemandServerMediaSubsession::closeStreamSource(), OnDemandServerMediaSubsession::createNewRTPSink(), OnDemandServerMediaSubsession::createNewStreamSource(), Medium::envir(), OnDemandServerMediaSubsession::fSDPLines, NULL, OnDemandServerMediaSubsession::setSDPLinesFromRTPSink(), and ServerMediaSubsession::trackNumber().

Referenced by OnDemandServerMediaSubsession::setSDPLinesFromRTPSink().

00074                                         {
00075   if (fSDPLines == NULL) {
00076     // We need to construct a set of SDP lines that describe this
00077     // subsession (as a unicast stream).  To do so, we first create
00078     // dummy (unused) source and "RTPSink" objects,
00079     // whose parameters we use for the SDP lines: 
00080     unsigned estBitrate; // unused
00081     FramedSource* inputSource = createNewStreamSource(0, estBitrate);
00082     if (inputSource == NULL) return NULL; // file not found
00083 
00084     struct in_addr dummyAddr;
00085     dummyAddr.s_addr = 0;
00086     Groupsock dummyGroupsock(envir(), dummyAddr, 0, 0);
00087     unsigned char rtpPayloadType = 96 + trackNumber()-1; // if dynamic
00088     RTPSink* dummyRTPSink
00089       = createNewRTPSink(&dummyGroupsock, rtpPayloadType, inputSource);
00090 
00091     setSDPLinesFromRTPSink(dummyRTPSink, inputSource);
00092     Medium::close(dummyRTPSink);
00093     closeStreamSource(inputSource);
00094   }
00095 
00096   return fSDPLines;
00097 }

void OnDemandServerMediaSubsession::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
	)			`[protected, virtual, inherited]`

Implements ServerMediaSubsession.

Definition at line 145 of file OnDemandServerMediaSubsession.cpp.

References HashTable::Add(), BasicUDPSink::createNew(), OnDemandServerMediaSubsession::createNewRTPSink(), OnDemandServerMediaSubsession::createNewStreamSource(), Medium::envir(), False, OnDemandServerMediaSubsession::fDestinationsHashTable, OnDemandServerMediaSubsession::fInitialPortNum, OnDemandServerMediaSubsession::fLastStreamToken, OnDemandServerMediaSubsession::fReuseFirstSource, NULL, Port::num(), Groupsock::removeAllDestinations(), Socket::socketNum(), OnDemandServerMediaSubsession::StreamState, and ServerMediaSubsession::trackNumber().

00157                                           {
00158   if (destinationAddress == 0) destinationAddress = clientAddress;
00159   struct in_addr destinationAddr; destinationAddr.s_addr = destinationAddress;
00160   isMulticast = False;
00161 
00162   if (fLastStreamToken != NULL && fReuseFirstSource) {
00163     // Special case: Rather than creating a new 'StreamState',
00164     // we reuse the one that we've already created:
00165     serverRTPPort = ((StreamState*)fLastStreamToken)->serverRTPPort();
00166     serverRTCPPort = ((StreamState*)fLastStreamToken)->serverRTCPPort();
00167     ++((StreamState*)fLastStreamToken)->referenceCount();
00168     streamToken = fLastStreamToken;
00169   } else {
00170     // Normal case: Create a new media source:
00171     unsigned streamBitrate;
00172     FramedSource* mediaSource
00173       = createNewStreamSource(clientSessionId, streamBitrate);
00174 
00175     // Create 'groupsock' and 'sink' objects for the destination,
00176     // using previously unused server port numbers:
00177     RTPSink* rtpSink;
00178     BasicUDPSink* udpSink;
00179     Groupsock* rtpGroupsock;
00180     Groupsock* rtcpGroupsock;
00181     portNumBits serverPortNum;
00182     if (clientRTCPPort.num() == 0) {
00183       // We're streaming raw UDP (not RTP). Create a single groupsock:
00184       NoReuse dummy; // ensures that we skip over ports that are already in use
00185       for (serverPortNum = fInitialPortNum; ; ++serverPortNum) {
00186         struct in_addr dummyAddr; dummyAddr.s_addr = 0;
00187 
00188         serverRTPPort = serverPortNum;
00189         rtpGroupsock = new Groupsock(envir(), dummyAddr, serverRTPPort, 255);
00190         if (rtpGroupsock->socketNum() >= 0) break; // success
00191       }
00192 
00193       rtcpGroupsock = NULL;
00194       rtpSink = NULL;
00195       udpSink = BasicUDPSink::createNew(envir(), rtpGroupsock);
00196     } else {
00197       // Normal case: We're streaming RTP (over UDP or TCP).  Create a pair of
00198       // groupsocks (RTP and RTCP), with adjacent port numbers (RTP port number even):
00199       NoReuse dummy; // ensures that we skip over ports that are already in use
00200       for (portNumBits serverPortNum = fInitialPortNum; ; serverPortNum += 2) {
00201         struct in_addr dummyAddr; dummyAddr.s_addr = 0;
00202 
00203         serverRTPPort = serverPortNum;
00204         rtpGroupsock = new Groupsock(envir(), dummyAddr, serverRTPPort, 255);
00205         if (rtpGroupsock->socketNum() < 0) {
00206           delete rtpGroupsock;
00207           continue; // try again
00208         }
00209 
00210         serverRTCPPort = serverPortNum+1;
00211         rtcpGroupsock = new Groupsock(envir(), dummyAddr, serverRTCPPort, 255);
00212         if (rtcpGroupsock->socketNum() < 0) {
00213           delete rtpGroupsock;
00214           delete rtcpGroupsock;
00215           continue; // try again
00216         }
00217 
00218         break; // success
00219       }
00220       
00221       unsigned char rtpPayloadType = 96 + trackNumber()-1; // if dynamic
00222       rtpSink = createNewRTPSink(rtpGroupsock, rtpPayloadType, mediaSource);
00223       udpSink = NULL;
00224     }
00225     
00226     // Turn off the destinations for each groupsock.  They'll get set later
00227     // (unless TCP is used instead):
00228     if (rtpGroupsock != NULL) rtpGroupsock->removeAllDestinations();
00229     if (rtcpGroupsock != NULL) rtcpGroupsock->removeAllDestinations();
00230 
00231     // Set up the state of the stream.  The stream will get started later:
00232     streamToken = fLastStreamToken
00233       = new StreamState(*this, serverRTPPort, serverRTCPPort, rtpSink, udpSink,
00234                         streamBitrate, mediaSource,
00235                         rtpGroupsock, rtcpGroupsock);
00236   }
00237   
00238   // Record these destinations as being for this client session id:
00239   Destinations* destinations;
00240   if (tcpSocketNum < 0) { // UDP
00241     destinations = new Destinations(destinationAddr, clientRTPPort, clientRTCPPort);
00242   } else { // TCP
00243     destinations = new Destinations(tcpSocketNum, rtpChannelId, rtcpChannelId);
00244   }
00245   fDestinationsHashTable->Add((char const*)clientSessionId, destinations);
00246 }

void OnDemandServerMediaSubsession::startStream	(	unsigned	clientSessionId,
		void *	streamToken,
		TaskFunc *	rtcpRRHandler,
		void *	rtcpRRHandlerClientData,
		unsigned short &	rtpSeqNum,
		unsigned &	rtpTimestamp
	)			`[protected, virtual, inherited]`

Implements ServerMediaSubsession.

Reimplemented in MPEG2TransportFileServerMediaSubsession.

Definition at line 248 of file OnDemandServerMediaSubsession.cpp.

References RTPSink::currentSeqNo(), OnDemandServerMediaSubsession::fDestinationsHashTable, HashTable::Lookup(), NULL, RTPSink::presetNextTimestamp(), StreamState::rtpSink(), and StreamState::startPlaying().

Referenced by MPEG2TransportFileServerMediaSubsession::startStream().

00253                                                                         {
00254   StreamState* streamState = (StreamState*)streamToken; 
00255   Destinations* destinations
00256     = (Destinations*)(fDestinationsHashTable->Lookup((char const*)clientSessionId));
00257   if (streamState != NULL) {
00258     streamState->startPlaying(destinations,
00259                               rtcpRRHandler, rtcpRRHandlerClientData);
00260     if (streamState->rtpSink() != NULL) {
00261       rtpSeqNum = streamState->rtpSink()->currentSeqNo();
00262       rtpTimestamp = streamState->rtpSink()->presetNextTimestamp();
00263     }
00264   }
00265 }

void OnDemandServerMediaSubsession::pauseStream	(	unsigned	clientSessionId,
		void *	streamToken
	)			`[protected, virtual, inherited]`

Reimplemented from ServerMediaSubsession.

Reimplemented in MPEG2TransportFileServerMediaSubsession.

Definition at line 267 of file OnDemandServerMediaSubsession.cpp.

References OnDemandServerMediaSubsession::fReuseFirstSource, NULL, and StreamState::pause().

Referenced by MPEG2TransportFileServerMediaSubsession::pauseStream(), and MPEG2TransportFileServerMediaSubsession::startStream().

00268                                                                    {
00269   // Pausing isn't allowed if multiple clients are receiving data from
00270   // the same source:
00271   if (fReuseFirstSource) return;
00272 
00273   StreamState* streamState = (StreamState*)streamToken; 
00274   if (streamState != NULL) streamState->pause();
00275 }

void OnDemandServerMediaSubsession::seekStream	(	unsigned	clientSessionId,
		void *	streamToken,
		float	seekNPT
	)			`[protected, virtual, inherited]`

Reimplemented from ServerMediaSubsession.

Reimplemented in MPEG2TransportFileServerMediaSubsession.

Definition at line 277 of file OnDemandServerMediaSubsession.cpp.

References OnDemandServerMediaSubsession::fReuseFirstSource, StreamState::mediaSource(), NULL, and OnDemandServerMediaSubsession::seekStreamSource().

Referenced by MPEG2TransportFileServerMediaSubsession::seekStream().

00278                                                                                  {
00279   // Seeking isn't allowed if multiple clients are receiving data from
00280   // the same source:
00281   if (fReuseFirstSource) return;
00282 
00283   StreamState* streamState = (StreamState*)streamToken; 
00284   if (streamState != NULL && streamState->mediaSource() != NULL) {
00285     seekStreamSource(streamState->mediaSource(), seekNPT);
00286   }
00287 }

void OnDemandServerMediaSubsession::setStreamScale	(	unsigned	clientSessionId,
		void *	streamToken,
		float	scale
	)			`[protected, virtual, inherited]`

Reimplemented from ServerMediaSubsession.

Reimplemented in MPEG2TransportFileServerMediaSubsession.

Definition at line 289 of file OnDemandServerMediaSubsession.cpp.

References OnDemandServerMediaSubsession::fReuseFirstSource, StreamState::mediaSource(), NULL, and OnDemandServerMediaSubsession::setStreamSourceScale().

Referenced by MPEG2TransportFileServerMediaSubsession::setStreamScale().

00290                                                                                    {
00291   // Changing the scale factor isn't allowed if multiple clients are receiving data
00292   // from the same source:
00293   if (fReuseFirstSource) return;
00294 
00295   StreamState* streamState = (StreamState*)streamToken; 
00296   if (streamState != NULL && streamState->mediaSource() != NULL) {
00297     setStreamSourceScale(streamState->mediaSource(), scale);
00298   }
00299 }

void OnDemandServerMediaSubsession::deleteStream	(	unsigned	clientSessionId,
		void *&	streamToken
	)			`[protected, virtual, inherited]`

Reimplemented from ServerMediaSubsession.

Reimplemented in MPEG2TransportFileServerMediaSubsession.

Definition at line 301 of file OnDemandServerMediaSubsession.cpp.

References StreamState::endPlaying(), OnDemandServerMediaSubsession::fDestinationsHashTable, OnDemandServerMediaSubsession::fLastStreamToken, HashTable::Lookup(), NULL, StreamState::referenceCount(), and HashTable::Remove().

Referenced by MPEG2TransportFileServerMediaSubsession::deleteStream().

00302                                                                      {
00303   StreamState* streamState = (StreamState*)streamToken; 
00304 
00305   // Look up (and remove) the destinations for this client session:
00306   Destinations* destinations
00307     = (Destinations*)(fDestinationsHashTable->Lookup((char const*)clientSessionId));
00308   if (destinations != NULL) {
00309     fDestinationsHashTable->Remove((char const*)clientSessionId);
00310 
00311     // Stop streaming to these destinations:
00312     if (streamState != NULL) streamState->endPlaying(destinations);
00313   }
00314 
00315   // Delete the "StreamState" structure if it's no longer being used:
00316   if (streamState != NULL) {
00317     if (streamState->referenceCount() > 0) --streamState->referenceCount();
00318     if (streamState->referenceCount() == 0) {
00319       delete streamState;
00320       if (fLastStreamToken == streamToken) fLastStreamToken = NULL; 
00321       streamToken = NULL;
00322     }
00323   }
00324 
00325   // Finally, delete the destinations themselves:
00326   delete destinations;
00327 }

char const * OnDemandServerMediaSubsession::getAuxSDPLine	(	RTPSink *	rtpSink,
		FramedSource *	inputSource
	)			`[protected, virtual, inherited]`

Reimplemented in MPEG4VideoFileServerMediaSubsession.

Definition at line 330 of file OnDemandServerMediaSubsession.cpp.

References RTPSink::auxSDPLine(), and NULL.

Referenced by OnDemandServerMediaSubsession::setSDPLinesFromRTPSink().

00330                                                                {
00331   // Default implementation:
00332   return rtpSink == NULL ? NULL : rtpSink->auxSDPLine();
00333 }

void OnDemandServerMediaSubsession::setStreamSourceScale	(	FramedSource *	inputSource,
		float	scale
	)			`[protected, virtual, inherited]`

Reimplemented in MP3AudioFileServerMediaSubsession, and WAVAudioFileServerMediaSubsession.

Definition at line 341 of file OnDemandServerMediaSubsession.cpp.

Referenced by OnDemandServerMediaSubsession::setStreamScale().

00341                                                                      {
00342   // Default implementation: Do nothing
00343 }

void OnDemandServerMediaSubsession::closeStreamSource ( FramedSource * inputSource ) [protected, virtual, inherited]

Definition at line 345 of file OnDemandServerMediaSubsession.cpp.

References Medium::close().

Referenced by StreamState::reclaim(), and OnDemandServerMediaSubsession::sdpLines().

00345                                                                                {
00346   Medium::close(inputSource);
00347 }

unsigned ServerMediaSubsession::trackNumber ( ) const [inline, inherited]

Definition at line 115 of file ServerMediaSession.hh.

References ServerMediaSubsession::fTrackNumber.

Referenced by OnDemandServerMediaSubsession::getStreamParameters(), and OnDemandServerMediaSubsession::sdpLines().

00115 { return fTrackNumber; }

char const * ServerMediaSubsession::trackId ( ) [inherited]

Definition at line 326 of file ServerMediaSession.cpp.

References ServerMediaSubsession::fTrackId, ServerMediaSubsession::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 }

void ServerMediaSubsession::testScaleFactor ( float & scale ) [virtual, inherited]

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 }

void ServerMediaSubsession::setServerAddressAndPortForSDP	(	netAddressBits	addressBits,
		portNumBits	portBits
	)			`[inherited]`

Definition at line 364 of file ServerMediaSession.cpp.

References ServerMediaSubsession::fPortNumForSDP, and ServerMediaSubsession::fServerAddressForSDP.

00365                                                                                 {
00366   fServerAddressForSDP = addressBits;
00367   fPortNumForSDP = portBits;
00368 }

char const * ServerMediaSubsession::rangeSDPLine ( ) const [protected, inherited]

Definition at line 371 of file ServerMediaSession.cpp.

References ServerMediaSubsession::duration(), ServerMediaSession::duration(), ServerMediaSubsession::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(), 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::~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(),

MPEG1or2DemuxedServerMediaSubsession Class Reference

Public Member Functions

Static Public Member Functions

Protected Member Functions

Protected Attributes

Private Member Functions

Private Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation