From 2ae0446917184b36996823e9dbf452dba82e8994 Mon Sep 17 00:00:00 2001
From: xuxiuxi <xuxiuxi@454eff88-639b-444f-9e54-f578c98de674>
Date: 星期五, 21 四月 2017 12:31:44 +0800
Subject: [PATCH]
---
VisitFace/RtspNativeCodec/app/libs/live555/include/liveMedia/ProxyServerMediaSession.hh | 237 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 237 insertions(+), 0 deletions(-)
diff --git a/VisitFace/RtspNativeCodec/app/libs/live555/include/liveMedia/ProxyServerMediaSession.hh b/VisitFace/RtspNativeCodec/app/libs/live555/include/liveMedia/ProxyServerMediaSession.hh
new file mode 100644
index 0000000..9d6b90a
--- /dev/null
+++ b/VisitFace/RtspNativeCodec/app/libs/live555/include/liveMedia/ProxyServerMediaSession.hh
@@ -0,0 +1,237 @@
+/**********
+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 subclass of "ServerMediaSession" that can be used to create a (unicast) RTSP servers that acts as a 'proxy' for
+// another (unicast or multicast) RTSP/RTP stream.
+// C++ header
+
+#ifndef _PROXY_SERVER_MEDIA_SESSION_HH
+#define _PROXY_SERVER_MEDIA_SESSION_HH
+
+#ifndef _SERVER_MEDIA_SESSION_HH
+#include "ServerMediaSession.hh"
+#endif
+#ifndef _MEDIA_SESSION_HH
+#include "MediaSession.hh"
+#endif
+#ifndef _RTSP_CLIENT_HH
+#include "RTSPClient.hh"
+#endif
+#ifndef _MEDIA_TRANSCODING_TABLE_HH
+#include "MediaTranscodingTable.hh"
+#endif
+
+// A subclass of "RTSPClient", used to refer to the particular "ProxyServerMediaSession" object being used.
+// It is used only within the implementation of "ProxyServerMediaSession", but is defined here, in case developers wish to
+// subclass it.
+
+class ProxyRTSPClient: public RTSPClient {
+public:
+ ProxyRTSPClient(class ProxyServerMediaSession& ourServerMediaSession, char const* rtspURL,
+ char const* username, char const* password,
+ portNumBits tunnelOverHTTPPortNum, int verbosityLevel, int socketNumToServer);
+ virtual ~ProxyRTSPClient();
+
+ void continueAfterDESCRIBE(char const* sdpDescription);
+ void continueAfterLivenessCommand(int resultCode, Boolean serverSupportsGetParameter);
+ void continueAfterSETUP(int resultCode);
+ void continueAfterPLAY(int resultCode);
+ void scheduleReset();
+
+private:
+ void reset();
+ int connectToServer(int socketNum, portNumBits remotePortNum);
+
+ Authenticator* auth() { return fOurAuthenticator; }
+
+ void scheduleLivenessCommand();
+ static void sendLivenessCommand(void* clientData);
+ void doReset();
+ static void doReset(void* clientData);
+
+ void scheduleDESCRIBECommand();
+ static void sendDESCRIBE(void* clientData);
+
+ static void subsessionTimeout(void* clientData);
+ void handleSubsessionTimeout();
+
+private:
+ friend class ProxyServerMediaSession;
+ friend class ProxyServerMediaSubsession;
+ ProxyServerMediaSession& fOurServerMediaSession;
+ char* fOurURL;
+ Authenticator* fOurAuthenticator;
+ Boolean fStreamRTPOverTCP;
+ class ProxyServerMediaSubsession *fSetupQueueHead, *fSetupQueueTail;
+ unsigned fNumSetupsDone;
+ unsigned fNextDESCRIBEDelay; // in seconds
+ Boolean fServerSupportsGetParameter, fLastCommandWasPLAY, fDoneDESCRIBE;
+ TaskToken fLivenessCommandTask, fDESCRIBECommandTask, fSubsessionTimerTask, fResetTask;
+};
+
+
+typedef ProxyRTSPClient*
+createNewProxyRTSPClientFunc(ProxyServerMediaSession& ourServerMediaSession,
+ char const* rtspURL,
+ char const* username, char const* password,
+ portNumBits tunnelOverHTTPPortNum, int verbosityLevel,
+ int socketNumToServer);
+ProxyRTSPClient*
+defaultCreateNewProxyRTSPClientFunc(ProxyServerMediaSession& ourServerMediaSession,
+ char const* rtspURL,
+ char const* username, char const* password,
+ portNumBits tunnelOverHTTPPortNum, int verbosityLevel,
+ int socketNumToServer);
+
+class ProxyServerMediaSession: public ServerMediaSession {
+public:
+ static ProxyServerMediaSession* createNew(UsageEnvironment& env,
+ GenericMediaServer* ourMediaServer, // Note: We can be used by just one server
+ char const* inputStreamURL, // the "rtsp://" URL of the stream we'll be proxying
+ char const* streamName = NULL,
+ char const* username = NULL, char const* password = NULL,
+ portNumBits tunnelOverHTTPPortNum = 0,
+ // for streaming the *proxied* (i.e., back-end) stream
+ int verbosityLevel = 0,
+ int socketNumToServer = -1,
+ MediaTranscodingTable* transcodingTable = NULL);
+ // Hack: "tunnelOverHTTPPortNum" == 0xFFFF (i.e., all-ones) means: Stream RTP/RTCP-over-TCP, but *not* using HTTP
+ // "verbosityLevel" == 1 means display basic proxy setup info; "verbosityLevel" == 2 means display RTSP client protocol also.
+ // If "socketNumToServer" is >= 0, then it is the socket number of an already-existing TCP connection to the server.
+ // (In this case, "inputStreamURL" must point to the socket's endpoint, so that it can be accessed via the socket.)
+
+ virtual ~ProxyServerMediaSession();
+
+ char const* url() const;
+
+ char describeCompletedFlag;
+ // initialized to 0; set to 1 when the back-end "DESCRIBE" completes.
+ // (This can be used as a 'watch variable' in "doEventLoop()".)
+ Boolean describeCompletedSuccessfully() const { return fClientMediaSession != NULL; }
+ // This can be used - along with "describeCompletdFlag" - to check whether the back-end "DESCRIBE" completed *successfully*.
+
+protected:
+ ProxyServerMediaSession(UsageEnvironment& env, GenericMediaServer* ourMediaServer,
+ char const* inputStreamURL, char const* streamName,
+ char const* username, char const* password,
+ portNumBits tunnelOverHTTPPortNum, int verbosityLevel,
+ int socketNumToServer,
+ MediaTranscodingTable* transcodingTable,
+ createNewProxyRTSPClientFunc* ourCreateNewProxyRTSPClientFunc
+ = defaultCreateNewProxyRTSPClientFunc,
+ portNumBits initialPortNum = 6970,
+ Boolean multiplexRTCPWithRTP = False);
+
+ // If you subclass "ProxyRTSPClient", then you will also need to define your own function
+ // - with signature "createNewProxyRTSPClientFunc" (see above) - that creates a new object
+ // of this subclass. You should also subclass "ProxyServerMediaSession" and, in your
+ // subclass's constructor, initialize the parent class (i.e., "ProxyServerMediaSession")
+ // constructor by passing your new function as the "ourCreateNewProxyRTSPClientFunc"
+ // parameter.
+
+ // Subclasses may redefine the following functions, if they want "ProxyServerSubsession"s
+ // to create subclassed "Groupsock" and/or "RTCPInstance" objects:
+ 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);
+
+ virtual Boolean allowProxyingForSubsession(MediaSubsession const& mss);
+ // By default, this function always returns True. However, a subclass may redefine this
+ // if it wishes to restrict which subsessions of a stream get proxied - e.g., if it wishes
+ // to proxy only video tracks, but not audio (or other) tracks.
+
+protected:
+ GenericMediaServer* fOurMediaServer;
+ ProxyRTSPClient* fProxyRTSPClient;
+ MediaSession* fClientMediaSession;
+
+private:
+ friend class ProxyRTSPClient;
+ friend class ProxyServerMediaSubsession;
+ void continueAfterDESCRIBE(char const* sdpDescription);
+ void resetDESCRIBEState(); // undoes what was done by "contineAfterDESCRIBE()"
+
+private:
+ int fVerbosityLevel;
+ class PresentationTimeSessionNormalizer* fPresentationTimeSessionNormalizer;
+ createNewProxyRTSPClientFunc* fCreateNewProxyRTSPClientFunc;
+ MediaTranscodingTable* fTranscodingTable;
+ portNumBits fInitialPortNum;
+ Boolean fMultiplexRTCPWithRTP;
+};
+
+
+////////// PresentationTimeSessionNormalizer and PresentationTimeSubsessionNormalizer definitions //////////
+
+// The following two classes are used by proxies to convert incoming streams' presentation times into wall-clock-aligned
+// presentation times that are suitable for our "RTPSink"s (for the corresponding outgoing streams).
+// (For multi-subsession (i.e., audio+video) sessions, the outgoing streams' presentation times retain the same relative
+// separation as those of the incoming streams.)
+
+class PresentationTimeSubsessionNormalizer: public FramedFilter {
+public:
+ void setRTPSink(RTPSink* rtpSink) { fRTPSink = rtpSink; }
+
+private:
+ friend class PresentationTimeSessionNormalizer;
+ PresentationTimeSubsessionNormalizer(PresentationTimeSessionNormalizer& parent, FramedSource* inputSource, RTPSource* rtpSource,
+ char const* codecName, PresentationTimeSubsessionNormalizer* next);
+ // called only from within "PresentationTimeSessionNormalizer"
+ virtual ~PresentationTimeSubsessionNormalizer();
+
+ static void afterGettingFrame(void* clientData, unsigned frameSize,
+ unsigned numTruncatedBytes,
+ struct timeval presentationTime,
+ unsigned durationInMicroseconds);
+ void afterGettingFrame(unsigned frameSize,
+ unsigned numTruncatedBytes,
+ struct timeval presentationTime,
+ unsigned durationInMicroseconds);
+
+private: // redefined virtual functions:
+ virtual void doGetNextFrame();
+
+private:
+ PresentationTimeSessionNormalizer& fParent;
+ RTPSource* fRTPSource;
+ RTPSink* fRTPSink;
+ char const* fCodecName;
+ PresentationTimeSubsessionNormalizer* fNext;
+};
+
+class PresentationTimeSessionNormalizer: public Medium {
+public:
+ PresentationTimeSessionNormalizer(UsageEnvironment& env);
+ virtual ~PresentationTimeSessionNormalizer();
+
+ PresentationTimeSubsessionNormalizer*
+ createNewPresentationTimeSubsessionNormalizer(FramedSource* inputSource, RTPSource* rtpSource, char const* codecName);
+
+private: // called only from within "~PresentationTimeSubsessionNormalizer":
+ friend class PresentationTimeSubsessionNormalizer;
+ void normalizePresentationTime(PresentationTimeSubsessionNormalizer* ssNormalizer,
+ struct timeval& toPT, struct timeval const& fromPT);
+ void removePresentationTimeSubsessionNormalizer(PresentationTimeSubsessionNormalizer* ssNormalizer);
+
+private:
+ PresentationTimeSubsessionNormalizer* fSubsessionNormalizers;
+ PresentationTimeSubsessionNormalizer* fMasterSSNormalizer; // used for subsessions that have been RTCP-synced
+
+ struct timeval fPTAdjustment; // Added to (RTCP-synced) subsession presentation times to 'normalize' them with wall-clock time.
+};
+
+#endif
--
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