text: /**********
  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.,
  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA
  **********/
  // "liveMedia"
  // Copyright (c) 1996-2015 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
  #ifndef _MP3_ADU_HH
  #include "MP3ADU.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')
  
  protected:
    MP3AudioFileServerMediaSubsession(UsageEnvironment& env,
  				    char const* fileName, Boolean reuseFirstSource,
  				    Boolean generateADUs,
  				    Interleaving* interleaving);
        // called only by createNew();
    virtual ~MP3AudioFileServerMediaSubsession();
  
    FramedSource* createNewStreamSourceCommon(FramedSource* baseMP3Source, unsigned mp3NumBytes, unsigned& estBitrate);
    void getBaseStreams(FramedSource* frontStream,
  		      FramedSource*& sourceMP3Stream, ADUFromMP3Source*& aduStream/*if any*/);
  
  protected: // redefined virtual functions
    virtual void seekStreamSource(FramedSource* inputSource, double& seekNPT, double streamDuration, u_int64_t& numBytes);
    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;
  
  protected:
    Boolean fGenerateADUs;
    Interleaving* fInterleaving;
    float fFileDuration;
  };
  
  #endif
  