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/**********
This library is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License as published by the
Free Software Foundation; either version 2.1 of the License, or (at your
option) any later version. (See <http://www.gnu.org/copyleft/lesser.html>.)
This library is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
more details.
You should have received a copy of the GNU Lesser General Public License
along with this library; if not, write to the Free Software Foundation, Inc.,
59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
**********/
// "liveMedia"
// Copyright (c) 1996-2004 Live Networks, Inc. All rights reserved.
// A 'ServerMediaSubsession' object that creates new, unicast, "RTPSink"s
// on demand.
// C++ header
#ifndef _ON_DEMAND_SERVER_MEDIA_SUBSESSION_HH
#define _ON_DEMAND_SERVER_MEDIA_SUBSESSION_HH
#ifndef _SERVER_MEDIA_SESSION_HH
#include "ServerMediaSession.hh"
#endif
#ifndef _RTP_SINK_HH
#include "RTPSink.hh"
#endif
class OnDemandServerMediaSubsession: public ServerMediaSubsession {
protected: // we're a virtual base class
OnDemandServerMediaSubsession(UsageEnvironment& env, Boolean reuseFirstSource);
virtual ~OnDemandServerMediaSubsession();
private: // redefined virtual functions
virtual char const* sdpLines(ServerMediaSession& parentSession);
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,
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);
protected: // new virtual functions, possibly redefined by subclasses
virtual char const* getAuxSDPLine(RTPSink* rtpSink,
FramedSource* inputSource);
virtual void seekStreamSource(FramedSource* inputSource, float seekNPT);
virtual void setStreamSourceScale(FramedSource* inputSource, float scale);
protected: // new virtual functions, defined by all subclasses
virtual FramedSource* createNewStreamSource(unsigned clientSessionId,
unsigned& estBitrate) = 0;
// "estBitrate" is the stream's estimated bitrate, in kbps
virtual RTPSink* createNewRTPSink(Groupsock* rtpGroupsock,
unsigned char rtpPayloadTypeIfDynamic,
FramedSource* inputSource) = 0;
private:
void setSDPLinesFromRTPSink(RTPSink* rtpSink, FramedSource* inputSource,
ServerMediaSession& parentSession);
// used to implement "sdpLines()"
private:
Boolean fReuseFirstSource;
HashTable* fDestinationsHashTable; // indexed by client session id
void* fLastStreamToken;
char* fSDPLines;
char fCNAME[100]; // for RTCP
};
#endif
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