amraudiortpsink.hh

来自「这是一个流媒体服务器」· HH 代码 · 共 64 行

/**********
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.,
59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
**********/
// "liveMedia"
// Copyright (c) 1996-2004 Live Networks, Inc.  All rights reserved.
// RTP sink for AMR audio (RFC 3267)
// 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);

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 frameTimestamp,
                                      unsigned numRemainingBytes);
  virtual Boolean
  frameCanAppearAfterPacketStart(unsigned char const* frameStart,
				 unsigned numBytesInFrame) const;

  virtual unsigned specialHeaderSize() const;
  virtual char const* auxSDPLine();

private:
  Boolean fSourceIsWideband;
  char* fAuxSDPLine;
};

#endif