mp3audiofileservermediasubsession.hh

流媒体传输协议的实现代码,非常有用.可以支持rtsp mms等流媒体传输协议

/**********
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This library is distributed in the hope that it will be useful, but WITHOUT
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FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for
more details.

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// "liveMedia"
// Copyright (c) 1996-2004 Live Networks, Inc.  All rights reserved.
// A 'ServerMediaSubsession' object that creates new, unicast, "RTPSink"s
// on demand, from an MP3 audio file.
// (Actually, any MPEG-1 or MPEG-2 audio file should work.)
// C++ header

#ifndef _MP3_AUDIO_FILE_SERVER_MEDIA_SUBSESSION_HH
#define _MP3_AUDIO_FILE_SERVER_MEDIA_SUBSESSION_HH

#ifndef _FILE_SERVER_MEDIA_SUBSESSION_HH
#include "FileServerMediaSubsession.hh"
#endif
#ifndef _MP3_ADU_INTERLEAVING_HH
#include "MP3ADUinterleaving.hh"
#endif

class MP3AudioFileServerMediaSubsession: public FileServerMediaSubsession{
public:
  static MP3AudioFileServerMediaSubsession*
  createNew(UsageEnvironment& env, char const* fileName, Boolean reuseFirstSource,
	    Boolean generateADUs, Interleaving* interleaving);
      // Note: "interleaving" is used only if "generateADUs" is True,
      // (and a value of NULL means 'no interleaving')

private:
  MP3AudioFileServerMediaSubsession(UsageEnvironment& env,
				    char const* fileName, Boolean reuseFirstSource,
				    Boolean generateADUs,
				    Interleaving* interleaving);
      // called only by createNew();
  virtual ~MP3AudioFileServerMediaSubsession();

private: // redefined virtual functions
  virtual void seekStreamSource(FramedSource* inputSource, float seekNPT);
  virtual void setStreamSourceScale(FramedSource* inputSource, float scale);
  virtual FramedSource* createNewStreamSource(unsigned clientSessionId,
					      unsigned& estBitrate);
  virtual RTPSink* createNewRTPSink(Groupsock* rtpGroupsock,
                                    unsigned char rtpPayloadTypeIfDynamic,
				    FramedSource* inputSource);
  virtual void testScaleFactor(float& scale);
  virtual float duration() const;

private:
  Boolean fGenerateADUs;
  Interleaving* fInterleaving;
  float fFileDuration;
};

#endif