nalucommon.h

包含了从MPEG4的视频解码到H.264的视频编码部分的源代码

/*
***********************************************************************
* COPYRIGHT AND WARRANTY INFORMATION
*
* Copyright 2001, International Telecommunications Union, Geneva
*
* DISCLAIMER OF WARRANTY
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* These software programs are available to the user without any
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* use of these programs.
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* and user's customers, employees, agents, transferees, successors,
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* The ITU does not represent or warrant that the programs furnished
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/*!
 **************************************************************************************
 * \file
 *    nalucommon.h.h
 * \brief
 *    NALU handling common to encoder and decoder
 *  \date 25 November 2002
 * \author
 *    Main contributors (see contributors.h for copyright, address and affiliation details) 
 *      - Stephan Wenger        <[e-mail]>
 ***************************************************************************************
 */


#ifndef _NALUCOMMON_H_
#define _NALUCOMMON_H_

#define MAXRBSPSIZE 64000

#define NALU_TYPE_SLICE   1
#define NALU_TYPE_DPA     2
#define NALU_TYPE_DPB     3
#define NALU_TYPE_DPC     4
#define NALU_TYPE_IDR     5
#define NALU_TYPE_SEI     6
#define NALU_TYPE_SPS     7
#define NALU_TYPE_PPS     8
#define NALU_TYPE_PD      9
#define NALU_TYPE_FILL    10

#define NALU_PRIORITY_HIGHEST     3
#define NALU_PRIORITY_HIGH        2
#define NALU_PRIRITY_LOW          1
#define NALU_PRIORITY_DISPOSABLE  0


typedef struct 
{
  int startcodeprefix_len;      //! 4 for parameter sets and first slice in picture, 3 for everything else (suggested)
  unsigned len;                 //! Length of the NAL unit (Excluding the start code, which does not belong to the NALU)
  unsigned max_size;            //! Nal Unit Buffer size
  int nal_unit_type;            //! NALU_TYPE_xxxx
  int nal_reference_idc;        //! NALU_PRIORITY_xxxx
  int forbidden_bit;            //! should be always FALSE
  char *buf;        //! conjtains the first byte followed by the EBSP
} NALU_t;


NALU_t *AllocNALU();
void FreeNALU(NALU_t *n);

#endif