mpeg4genericrtpsink.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

/**********
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.
// MPEG4-GENERIC ("audio", "video", or "application") RTP stream sinks
// C++ header

#ifndef _MPEG4_GENERIC_RTP_SINK_HH
#define _MPEG4_GENERIC_RTP_SINK_HH

#ifndef _MULTI_FRAMED_RTP_SINK_HH
#include "MultiFramedRTPSink.hh"
#endif

class MPEG4GenericRTPSink: public MultiFramedRTPSink {
public:
  static MPEG4GenericRTPSink*
  createNew(UsageEnvironment& env, Groupsock* RTPgs,
	    u_int8_t rtpPayloadFormat, u_int32_t rtpTimestampFrequency,
	    char const* sdpMediaTypeString, char const* mpeg4Mode,
	    char const* configString,
	    unsigned numChannels = 1);

protected:
  MPEG4GenericRTPSink(UsageEnvironment& env, Groupsock* RTPgs,
		      u_int8_t rtpPayloadFormat,
		      u_int32_t rtpTimestampFrequency,
		      char const* sdpMediaTypeString,
		      char const* mpeg4Mode, char const* configString,
		      unsigned numChannels);
	// called only by createNew()

  virtual ~MPEG4GenericRTPSink();

private: // redefined virtual functions:
  virtual
  Boolean frameCanAppearAfterPacketStart(unsigned char const* frameStart,
					 unsigned numBytesInFrame) const;
  virtual void doSpecialFrameHandling(unsigned fragmentationOffset,
                                      unsigned char* frameStart,
                                      unsigned numBytesInFrame,
                                      struct timeval frameTimestamp,
                                      unsigned numRemainingBytes);
  virtual unsigned specialHeaderSize() const;

  virtual char const* sdpMediaType() const;

  virtual char const* auxSDPLine(); // for the "a=fmtp:" SDP line

private:
  char const* fSDPMediaTypeString;
  char const* fMPEG4Mode;
  char const* fConfigString;
  char* fFmtpSDPLine;
};

#endif