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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 3 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., |
| | | 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| | | **********/ |
| | | // "liveMedia" |
| | | // Copyright (c) 1996-2017 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 |
| | | #ifndef _BASIC_UDP_SINK_HH |
| | | #include "BasicUDPSink.hh" |
| | | #endif |
| | | #ifndef _RTCP_HH |
| | | #include "RTCP.hh" |
| | | #endif |
| | | |
| | | class OnDemandServerMediaSubsession: public ServerMediaSubsession { |
| | | protected: // we're a virtual base class |
| | | OnDemandServerMediaSubsession(UsageEnvironment& env, Boolean reuseFirstSource, |
| | | portNumBits initialPortNum = 6970, |
| | | Boolean multiplexRTCPWithRTP = False); |
| | | virtual ~OnDemandServerMediaSubsession(); |
| | | |
| | | protected: // redefined virtual 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, |
| | | ServerRequestAlternativeByteHandler* serverRequestAlternativeByteHandler, |
| | | void* serverRequestAlternativeByteHandlerClientData); |
| | | virtual void pauseStream(unsigned clientSessionId, void* streamToken); |
| | | virtual void seekStream(unsigned clientSessionId, void* streamToken, double& seekNPT, double streamDuration, u_int64_t& numBytes); |
| | | virtual void seekStream(unsigned clientSessionId, void* streamToken, char*& absStart, char*& absEnd); |
| | | virtual void nullSeekStream(unsigned clientSessionId, void* streamToken, |
| | | double streamEndTime, u_int64_t& numBytes); |
| | | virtual void setStreamScale(unsigned clientSessionId, void* streamToken, float scale); |
| | | virtual float getCurrentNPT(void* streamToken); |
| | | virtual FramedSource* getStreamSource(void* streamToken); |
| | | virtual void getRTPSinkandRTCP(void* streamToken, |
| | | RTPSink const*& rtpSink, RTCPInstance const*& rtcp); |
| | | 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, double& seekNPT, double streamDuration, u_int64_t& numBytes); |
| | | // This routine is used to seek by relative (i.e., NPT) time. |
| | | // "streamDuration", if >0.0, specifies how much data to stream, past "seekNPT". (If <=0.0, all remaining data is streamed.) |
| | | // "numBytes" returns the size (in bytes) of the data to be streamed, or 0 if unknown or unlimited. |
| | | virtual void seekStreamSource(FramedSource* inputSource, char*& absStart, char*& absEnd); |
| | | // This routine is used to seek by 'absolute' time. |
| | | // "absStart" should be a string of the form "YYYYMMDDTHHMMSSZ" or "YYYYMMDDTHHMMSS.<frac>Z". |
| | | // "absEnd" should be either NULL (for no end time), or a string of the same form as "absStart". |
| | | // These strings may be modified in-place, or can be reassigned to a newly-allocated value (after delete[]ing the original). |
| | | virtual void setStreamSourceScale(FramedSource* inputSource, float scale); |
| | | virtual void setStreamSourceDuration(FramedSource* inputSource, double streamDuration, u_int64_t& numBytes); |
| | | virtual void closeStreamSource(FramedSource* inputSource); |
| | | |
| | | 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; |
| | | |
| | | protected: // new virtual functions, may be redefined by a subclass: |
| | | virtual Groupsock* createGroupsock(struct in_addr const& addr, Port port); |
| | | virtual RTCPInstance* createRTCP(Groupsock* RTCPgs, unsigned totSessionBW, /* in kbps */ |
| | | unsigned char const* cname, RTPSink* sink); |
| | | |
| | | public: |
| | | void multiplexRTCPWithRTP() { fMultiplexRTCPWithRTP = True; } |
| | | // An alternative to passing the "multiplexRTCPWithRTP" parameter as True in the constructor |
| | | |
| | | void setRTCPAppPacketHandler(RTCPAppHandlerFunc* handler, void* clientData); |
| | | // Sets a handler to be called if a RTCP "APP" packet arrives from any future client. |
| | | // (Any current clients are not affected; any "APP" packets from them will continue to be |
| | | // handled by whatever handler existed when the client sent its first RTSP "PLAY" command.) |
| | | // (Call with (NULL, NULL) to remove an existing handler - for future clients only) |
| | | |
| | | void sendRTCPAppPacket(u_int8_t subtype, char const* name, |
| | | u_int8_t* appDependentData, unsigned appDependentDataSize); |
| | | // Sends a custom RTCP "APP" packet to the most recent client (if "reuseFirstSource" was False), |
| | | // or to all current clients (if "reuseFirstSource" was True). |
| | | // The parameters correspond to their |
| | | // respective fields as described in the RTP/RTCP definition (RFC 3550). |
| | | // Note that only the low-order 5 bits of "subtype" are used, and only the first 4 bytes |
| | | // of "name" are used. (If "name" has fewer than 4 bytes, or is NULL, |
| | | // then the remaining bytes are '\0'.) |
| | | |
| | | private: |
| | | void setSDPLinesFromRTPSink(RTPSink* rtpSink, FramedSource* inputSource, |
| | | unsigned estBitrate); |
| | | // used to implement "sdpLines()" |
| | | |
| | | protected: |
| | | char* fSDPLines; |
| | | HashTable* fDestinationsHashTable; // indexed by client session id |
| | | |
| | | private: |
| | | Boolean fReuseFirstSource; |
| | | portNumBits fInitialPortNum; |
| | | Boolean fMultiplexRTCPWithRTP; |
| | | void* fLastStreamToken; |
| | | char fCNAME[100]; // for RTCP |
| | | RTCPAppHandlerFunc* fAppHandlerTask; |
| | | void* fAppHandlerClientData; |
| | | friend class StreamState; |
| | | }; |
| | | |
| | | |
| | | // A class that represents the state of an ongoing stream. This is used only internally, in the implementation of |
| | | // "OnDemandServerMediaSubsession", but we expose the definition here, in case subclasses of "OnDemandServerMediaSubsession" |
| | | // want to access it. |
| | | |
| | | class Destinations { |
| | | public: |
| | | Destinations(struct in_addr const& destAddr, |
| | | Port const& rtpDestPort, |
| | | Port const& rtcpDestPort) |
| | | : isTCP(False), addr(destAddr), rtpPort(rtpDestPort), rtcpPort(rtcpDestPort) { |
| | | } |
| | | Destinations(int tcpSockNum, unsigned char rtpChanId, unsigned char rtcpChanId) |
| | | : isTCP(True), rtpPort(0) /*dummy*/, rtcpPort(0) /*dummy*/, |
| | | tcpSocketNum(tcpSockNum), rtpChannelId(rtpChanId), rtcpChannelId(rtcpChanId) { |
| | | } |
| | | |
| | | public: |
| | | Boolean isTCP; |
| | | struct in_addr addr; |
| | | Port rtpPort; |
| | | Port rtcpPort; |
| | | int tcpSocketNum; |
| | | unsigned char rtpChannelId, rtcpChannelId; |
| | | }; |
| | | |
| | | class StreamState { |
| | | public: |
| | | StreamState(OnDemandServerMediaSubsession& master, |
| | | Port const& serverRTPPort, Port const& serverRTCPPort, |
| | | RTPSink* rtpSink, BasicUDPSink* udpSink, |
| | | unsigned totalBW, FramedSource* mediaSource, |
| | | Groupsock* rtpGS, Groupsock* rtcpGS); |
| | | virtual ~StreamState(); |
| | | |
| | | void startPlaying(Destinations* destinations, unsigned clientSessionId, |
| | | TaskFunc* rtcpRRHandler, void* rtcpRRHandlerClientData, |
| | | ServerRequestAlternativeByteHandler* serverRequestAlternativeByteHandler, |
| | | void* serverRequestAlternativeByteHandlerClientData); |
| | | void pause(); |
| | | void sendRTCPAppPacket(u_int8_t subtype, char const* name, |
| | | u_int8_t* appDependentData, unsigned appDependentDataSize); |
| | | void endPlaying(Destinations* destinations, unsigned clientSessionId); |
| | | void reclaim(); |
| | | |
| | | unsigned& referenceCount() { return fReferenceCount; } |
| | | |
| | | Port const& serverRTPPort() const { return fServerRTPPort; } |
| | | Port const& serverRTCPPort() const { return fServerRTCPPort; } |
| | | |
| | | RTPSink* rtpSink() const { return fRTPSink; } |
| | | RTCPInstance* rtcpInstance() const { return fRTCPInstance; } |
| | | |
| | | float streamDuration() const { return fStreamDuration; } |
| | | |
| | | FramedSource* mediaSource() const { return fMediaSource; } |
| | | float& startNPT() { return fStartNPT; } |
| | | |
| | | private: |
| | | OnDemandServerMediaSubsession& fMaster; |
| | | Boolean fAreCurrentlyPlaying; |
| | | unsigned fReferenceCount; |
| | | |
| | | Port fServerRTPPort, fServerRTCPPort; |
| | | |
| | | RTPSink* fRTPSink; |
| | | BasicUDPSink* fUDPSink; |
| | | |
| | | float fStreamDuration; |
| | | unsigned fTotalBW; |
| | | RTCPInstance* fRTCPInstance; |
| | | |
| | | FramedSource* fMediaSource; |
| | | float fStartNPT; // initial 'normal play time'; reset after each seek |
| | | |
| | | Groupsock* fRTPgs; |
| | | Groupsock* fRTCPgs; |
| | | }; |
| | | |
| | | #endif |