h263plusvideortpsource.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.
// H.263+ Video RTP Sources
// C++ header

#ifndef _H263_PLUS_VIDEO_RTP_SOURCE_HH
#define _H263_PLUS_VIDEO_RTP_SOURCE_HH

#ifndef _MULTI_FRAMED_RTP_SOURCE_HH
#include "MultiFramedRTPSource.hh"
#endif

#define SPECIAL_HEADER_BUFFER_SIZE 1000

class H263plusVideoRTPSource: public MultiFramedRTPSource {
public:
  static H263plusVideoRTPSource*
  createNew(UsageEnvironment& env, Groupsock* RTPgs,
	    unsigned char rtpPayloadFormat,
	    unsigned rtpTimestampFrequency = 90000);

  // A data structure that stores copies of the special header bytes
  // from the most recent frame's RTP packets:
  unsigned char fNumSpecialHeaders;
  unsigned fSpecialHeaderBytesLength;
  unsigned char fSpecialHeaderBytes[SPECIAL_HEADER_BUFFER_SIZE];
  unsigned fPacketSizes[256];

protected:
  virtual ~H263plusVideoRTPSource();

private:
  H263plusVideoRTPSource(UsageEnvironment& env, Groupsock* RTPgs,
			 unsigned char rtpPayloadFormat,
			 unsigned rtpTimestampFrequency);
      // called only by createNew()

private:
  // redefined virtual functions:
  virtual Boolean processSpecialHeader(BufferedPacket* packet,
                                       unsigned& resultSpecialHeaderSize);
  virtual char const* MIMEtype() const; 
};

#endif