AMRAudioRTPSink.hh

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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.,
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**********/
// "liveMedia"
// Copyright (c) 1996-2024 Live Networks, Inc.  All rights reserved.
// RTP sink for AMR audio (RFC 4867)
// C++ header
 
#ifndef _AMR_AUDIO_RTP_SINK_HH
#define _AMR_AUDIO_RTP_SINK_HH
 
#ifndef _AUDIO_RTP_SINK_HH
#include "AudioRTPSink.hh"
#endif
 
class AMRAudioRTPSink: public AudioRTPSink {
public:
  static AMRAudioRTPSink* createNew(UsageEnvironment& env,
                                    Groupsock* RTPgs,
                                    unsigned char rtpPayloadFormat,
                                    Boolean sourceIsWideband = False,
                                    unsigned numChannelsInSource = 1);
 
  Boolean sourceIsWideband() const { return fSourceIsWideband; }
 
protected:
  AMRAudioRTPSink(UsageEnvironment& env, Groupsock* RTPgs,
                  unsigned char rtpPayloadFormat,
                  Boolean sourceIsWideband, unsigned numChannelsInSource);
        // called only by createNew()
 
  virtual ~AMRAudioRTPSink();
 
private: // redefined virtual functions:
  virtual Boolean sourceIsCompatibleWithUs(MediaSource& source);
  virtual void doSpecialFrameHandling(unsigned fragmentationOffset,
                                      unsigned char* frameStart,
                                      unsigned numBytesInFrame,
                                      struct timeval framePresentationTime,
                                      unsigned numRemainingBytes);
  virtual Boolean
  frameCanAppearAfterPacketStart(unsigned char const* frameStart,
                                 unsigned numBytesInFrame) const;
 
  virtual unsigned specialHeaderSize() const;
  virtual char const* auxSDPLine();
 
private:
  Boolean fSourceIsWideband;
  char* fFmtpSDPLine;
};
 
#endif