TheoraVideoRTPSink.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
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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
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**********/
// "liveMedia"
// Copyright (c) 1996-2024 Live Networks, Inc.  All rights reserved.
// RTP sink for Theora video
// C++ header
 
#ifndef _THEORA_VIDEO_RTP_SINK_HH
#define _THEORA_VIDEO_RTP_SINK_HH
 
#ifndef _VIDEO_RTP_SINK_HH
#include "VideoRTPSink.hh"
#endif
 
class TheoraVideoRTPSink: public VideoRTPSink {
public:
  static TheoraVideoRTPSink*
  createNew(UsageEnvironment& env, Groupsock* RTPgs, u_int8_t rtpPayloadFormat,
            // The following headers provide the 'configuration' information, for the SDP description:
            u_int8_t* identificationHeader, unsigned identificationHeaderSize,
            u_int8_t* commentHeader, unsigned commentHeaderSize,
            u_int8_t* setupHeader, unsigned setupHeaderSize,
            u_int32_t identField = 0xFACADE);
  
  static TheoraVideoRTPSink*
  createNew(UsageEnvironment& env, Groupsock* RTPgs, u_int8_t rtpPayloadFormat,
            char const* configStr);
  // an optional variant of "createNew()" that takes a Base-64-encoded 'configuration' string,
  // rather than the raw configuration headers as parameter.
 
protected:
  TheoraVideoRTPSink(UsageEnvironment& env, Groupsock* RTPgs,
                     u_int8_t rtpPayloadFormat,
                     u_int8_t* identificationHeader, unsigned identificationHeaderSize,
                     u_int8_t* commentHeader, unsigned commentHeaderSize,
                     u_int8_t* setupHeader, unsigned setupHeaderSize,
                     u_int32_t identField);
  // called only by createNew()
  
  virtual ~TheoraVideoRTPSink();
  
private: // redefined virtual functions:
  virtual char const* auxSDPLine(); // for the "a=fmtp:" SDP line
  
  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;
  
private:
  u_int32_t fIdent; // "Ident" field used by this stream.  (Only the low 24 bits of this are used.)
  char* fFmtpSDPLine;
};
 
#endif