global.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
*
* These software programs are available to the user without any
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* statutory, including any implied warranties of merchantability
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* contributor or the ITU be liable for any incidental, punitive, or
* consequential damages of any kind whatsoever arising from the
* use of these programs.
*
* This disclaimer of warranty extends to the user of these programs
* and user's customers, employees, agents, transferees, successors,
* and assigns.
*
* The ITU does not represent or warrant that the programs furnished
* hereunder are free of infringement of any third-party patents.
* Commercial implementations of ITU-T Recommendations, including
* shareware, may be subject to royalty fees to patent holders.
* Information regarding the ITU-T patent policy is available from
* the ITU Web site at http://www.itu.int.
*
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************************************************************************
*/

/*!
 ************************************************************************
 *  \file
 *     global.h
 *  \brief
 *     global definitions for for H.26L decoder.
 *  \author
 *     Copyright (C) 1999  Telenor Satellite Services,Norway
 *                         Ericsson Radio Systems, Sweden
 *
 *     Inge Lille-Lang鴜               <[e-mail]>
 *
 *     Telenor Satellite Services
 *     Keysers gt.13                       tel.:   [phone]
 *     N-0130 Oslo,Norway                  fax.:   [phone]
 *
 *     Rickard Sjoberg                 <[e-mail]>
 *
 *     Ericsson Radio Systems
 *     KI/ERA/T/VV
 *     164 80 Stockholm, Sweden
 *
 ************************************************************************
 */
#ifndef _GLOBAL_H_
#define _GLOBAL_H_

#include <stdio.h>                              //!< for FILE
#include "defines.h"
#include "parsetcommon.h"

#ifdef WIN32
  #define  snprintf _snprintf
#endif


typedef unsigned char   byte;                   //!<  8 bit unsigned
typedef int             int32;
typedef unsigned int    u_int32;

unsigned int toprefpoc[MAX_REFERENCE_PICTURES];
unsigned int bottomrefpoc[MAX_REFERENCE_PICTURES];

pic_parameter_set_rbsp_t *active_pps;
seq_parameter_set_rbsp_t *active_sps;

// global picture format dependend buffers, mem allocation in decod.c ******************
int  **refFrArr;                                //!< Array for reference frames of each block
byte **imgY;                                    //!< array for the decoded luma component
byte ***imgUV;                                  //!< array for the chroma component

int   **moving_block;           //<! stationary block buffer
int   **moving_block_frm;       //<! stationary block buffer - frame
int   **moving_block_top;       //<! stationary block buffer - field
int   **moving_block_bot;       //<! stationary block buffer - field


// B pictures
byte **imgY_prev;
byte ***imgUV_prev;

byte **imgY_ref;                                //!< reference frame find snr
byte ***imgUV_ref;

// B pictures
int  Bframe_ctr;
byte prevP_tr, nextP_tr, P_interval;
int  frame_no;

int  **refFrArr_frm;
int  **refFrArr_top;
int  **refFrArr_bot;
byte **imgY_frm;
byte **imgY_top;
byte **imgY_bot;
byte ***imgUV_frm;
byte ***imgUV_top;
byte ***imgUV_bot;

byte ***mref_frm;                               //!< 1/1 pix luma for direct interpolation
byte ****mcef_frm;                              //!< pix chroma

byte ***mref_fld;                               //!< 1/1 pix luma for direct interpolation
byte ****mcef_fld;     
byte nextP_tr_frm, nextP_tr_fld;
int  **field_mb;
int  *parity_fld;
int  *chroma_vector_adjustment;

// For MB level frame/field coding
int  TopFieldForSkip_Y[16][16];
int  TopFieldForSkip_UV[2][16][16];


#define ET_SIZE 300      //!< size of error text buffer
char errortext[ET_SIZE]; //!< buffer for error message for exit with error()

/***********************************************************************
 * T y p e    d e f i n i t i o n s    f o r    T M L
 ***********************************************************************
 */

//! Data Partitioning Modes
typedef enum
{
  PAR_DP_1,    //<! no data partitioning is supported
  PAR_DP_3,    //<! data partitioning with 3 partitions
} PAR_DP_TYPE;


//! Output File Types
typedef enum
{
  PAR_OF_ANNEXB,   //<! Current TML description
  PAR_OF_RTP,   //<! RTP Packet Output format
//  PAR_OF_IFF    //<! Interim File Format
} PAR_OF_TYPE;

//! Boolean Type
/*typedef enum {
  FALSE,
  TRUE
} Boolean;
*/
//! definition of H.26L syntax elements
typedef enum {
  SE_HEADER,
  SE_PTYPE,
  SE_MBTYPE,
  SE_REFFRAME,
  SE_INTRAPREDMODE,
  SE_MVD,
  SE_CBP_INTRA,
  SE_LUM_DC_INTRA,
  SE_CHR_DC_INTRA,
  SE_LUM_AC_INTRA,
  SE_CHR_AC_INTRA,
  SE_CBP_INTER,
  SE_LUM_DC_INTER,
  SE_CHR_DC_INTER,
  SE_LUM_AC_INTER,
  SE_CHR_AC_INTER,
  SE_DELTA_QUANT_INTER,
  SE_DELTA_QUANT_INTRA,
  SE_BFRAME,
  SE_EOS,
  SE_MAX_ELEMENTS //!< number of maximum syntax elements, this MUST be the last one!
} SE_type;        // substituting the definitions in element.h


typedef enum {
  INTER_MB,
  INTRA_MB_4x4,
  INTRA_MB_16x16
} IntraInterDecision;

typedef enum {
  BITS_TOTAL_MB,
  BITS_HEADER_MB,
  BITS_INTER_MB,
  BITS_CBP_MB,
  BITS_COEFF_Y_MB,
  BITS_COEFF_UV_MB,
  MAX_BITCOUNTER_MB
} BitCountType;

typedef enum {
  NO_SLICES,
  FIXED_MB,
  FIXED_RATE,
  CALLBACK,
  FMO
} SliceMode;


typedef enum {
  UVLC,
  CABAC
} SymbolMode;


typedef enum {
  FRAME,
  TOP_FIELD,
  BOTTOM_FIELD
} PictureType;           //!< New enum for field processing

typedef enum {
  P_SLICE = 0,
  B_SLICE,
  I_SLICE,
  SP_SLICE,
  SI_SLICE
} SliceType;

/***********************************************************************
 * D a t a    t y p e s   f o r  C A B A C
 ***********************************************************************
 */

//! struct to characterize the state of the arithmetic coding engine
typedef struct
{
  unsigned int    Dlow, Drange;
  unsigned int    Dvalue;
  unsigned int    Dbuffer;
  int             Dbits_to_go;
  byte            *Dcodestrm;
  int             *Dcodestrm_len;
} DecodingEnvironment;

typedef DecodingEnvironment *DecodingEnvironmentPtr;

//! struct for context management
typedef struct
{
  unsigned short state;         // index into state-table CP  
  unsigned char  MPS;           // Least Probable Symbol 0/1 CP
} BiContextType;

typedef BiContextType *BiContextTypePtr;


/**********************************************************************
 * C O N T E X T S   F O R   T M L   S Y N T A X   E L E M E N T S
 **********************************************************************
 */

#define NUM_MB_TYPE_CTX  11
#define NUM_B8_TYPE_CTX  9
#define NUM_MV_RES_CTX   10
#define NUM_REF_NO_CTX   6
#define NUM_DELTA_QP_CTX 4
#define NUM_MB_AFF_CTX 4


typedef struct
{
  BiContextType mb_type_contexts [4][NUM_MB_TYPE_CTX];
  BiContextType b8_type_contexts [2][NUM_B8_TYPE_CTX];
  BiContextType mv_res_contexts  [2][NUM_MV_RES_CTX];
  BiContextType ref_no_contexts  [2][NUM_REF_NO_CTX];
  BiContextType delta_qp_contexts[NUM_DELTA_QP_CTX];
  BiContextType mb_aff_contexts  [NUM_MB_AFF_CTX];
} MotionInfoContexts;

#define NUM_IPR_CTX    2
#define NUM_CIPR_CTX   4
#define NUM_CBP_CTX    4
#define NUM_BCBP_CTX   4
#define NUM_MAP_CTX   15
#define NUM_LAST_CTX  15
#define NUM_ONE_CTX    5
#define NUM_ABS_CTX    5


typedef struct
{