MPEG4VideoStreamFramer.hh

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FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for
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// "liveMedia"
// Copyright (c) 1996-2024 Live Networks, Inc.  All rights reserved.
// A filter that breaks up an MPEG-4 video elementary stream into
//   frames for:
// - Visual Object Sequence (VS) Header + Visual Object (VO) Header
//   + Video Object Layer (VOL) Header
// - Group of VOP (GOV) Header
// - VOP frame
// C++ header
 
#ifndef _MPEG4_VIDEO_STREAM_FRAMER_HH
#define _MPEG4_VIDEO_STREAM_FRAMER_HH
 
#ifndef _MPEG_VIDEO_STREAM_FRAMER_HH
#include "MPEGVideoStreamFramer.hh"
#endif
 
class MPEG4VideoStreamFramer: public MPEGVideoStreamFramer {
public:
  static MPEG4VideoStreamFramer*
  createNew(UsageEnvironment& env, FramedSource* inputSource);
 
  u_int8_t profile_and_level_indication() const {
    return fProfileAndLevelIndication;
  }
 
  unsigned char* getConfigBytes(unsigned& numBytes) const;
 
  void setConfigInfo(u_int8_t profileAndLevelIndication, char const* configStr);
    // Assigns the "profile_and_level_indication" number, and the 'config' bytes.
    // If this function is not called, then this data is only assigned later, when it appears in the input stream.
 
protected:
  MPEG4VideoStreamFramer(UsageEnvironment& env,
                         FramedSource* inputSource,
                         Boolean createParser = True);
      // called only by createNew(), or by subclass constructors
  virtual ~MPEG4VideoStreamFramer();
 
  void startNewConfig();
  void appendToNewConfig(unsigned char* newConfigBytes,
                         unsigned numNewBytes);
  void completeNewConfig();
 
private:
  // redefined virtual functions:
  virtual Boolean isMPEG4VideoStreamFramer() const;
 
protected:
  u_int8_t fProfileAndLevelIndication;
  unsigned char* fConfigBytes;
  unsigned fNumConfigBytes;
 
private:
  unsigned char* fNewConfigBytes;
  unsigned fNumNewConfigBytes;
  friend class MPEG4VideoStreamParser; // hack
};
 
#endif