global.h

h.264/avc 视频编码程序,实现分数像素匹配功能,非原创.

/*
***********************************************************************
* COPYRIGHT AND WARRANTY INFORMATION
*
* Copyright 2001, International Telecommunications Union, Geneva
*
* DISCLAIMER OF WARRANTY
*
* These software programs are available to the user without any
* license fee or royalty on an "as is" basis. The ITU disclaims
* any and all warranties, whether express, implied, or
* statutory, including any implied warranties of merchantability
* or of fitness for a particular purpose.  In no event shall the
* 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.
*
* THIS IS NOT A GRANT OF PATENT RIGHTS - SEE THE ITU-T PATENT POLICY.
************************************************************************
*/

/*!
 ************************************************************************
 *  \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"

#ifdef WIN32
  #define  snprintf _snprintf
#endif


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


// 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 **imgY_pf;                                 //<! Post filter luma image
byte ***imgUV;                                  //<! array for the chroma component
byte ***imgUV_pf;                               //<! Post filter luma image

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

byte **mref_P_small;                            //<! 1/4 pix luma for next P picture

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;

#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_26L,   //<! 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 {
  SINGLE_SCAN,
  DOUBLE_SCAN
} ScanMode;

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

typedef enum {
  UVLC,
  CABAC
} SymbolMode;


/***********************************************************************
 * 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 int  cum_freq[2];          //!< cumulated frequency counts
  Boolean     in_use;                 //!< flag for context in use
  unsigned int  max_cum_freq;         //!< maximum frequency count
} 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

typedef struct
{
  BiContextTypePtr mb_type_contexts[3];
  BiContextTypePtr b8_type_contexts[2];
  BiContextTypePtr mv_res_contexts [2];
  BiContextTypePtr ref_no_contexts [2];
  BiContextTypePtr delta_qp_inter_contexts;
  BiContextTypePtr delta_qp_intra_contexts;
} MotionInfoContexts;


#define NUM_IPR_CTX    2
#define NUM_CBP_CTX    4
#define NUM_TRANS_TYPE 9
#define NUM_LEVEL_CTX  4
#define NUM_RUN_CTX    2
#define NUM_COEFF_COUNT_CTX 6

typedef struct
{
  BiContextTypePtr ipr_contexts [6];
  BiContextTypePtr cbp_contexts [2][3];
  BiContextTypePtr level_context[4*NUM_TRANS_TYPE];
  BiContextTypePtr run_context  [2*NUM_TRANS_TYPE];
  BiContextTypePtr coeff_count_context[NUM_TRANS_TYPE];
} TextureInfoContexts;

//*********************** end of data type definition for CABAC *******************

/***********************************************************************
 * N e w   D a t a    t y p e s   f o r    T M L
 ***********************************************************************
 */

struct img_par;
struct inp_par;
struct stat_par;

/*! Buffer structure for RMPNI commands */
typedef struct RMPNIbuffer_s
{
  int RMPNI;
  int Data;
  struct RMPNIbuffer_s *Next;
} RMPNIbuffer_t;

/*! Buffer structure for MMCO commands */
typedef struct MMCObuffer_s
{
  int MMCO;
  int DPN;
  int LPIN;
  int MLIP1;
  struct MMCObuffer_s *Next;
} MMCObuffer_t;

//! Syntaxelement
typedef struct syntaxelement
{
  int           type;                  //!< type of syntax element for data part.
  int           value1;                //!< numerical value of syntax element
  int           value2;                //!< for blocked symbols, e.g. run/level
  int           len;                   //!< length of code
  int           inf;                   //!< info part of UVLC code
  unsigned int  bitpattern;            //!< UVLC bitpattern
  int           context;               //!< CABAC context
  int           k;                     //!< CABAC context for coeff_count,uv
#if TRACE
  #define       TRACESTRING_SIZE 100           //!< size of trace string
  char          tracestring[TRACESTRING_SIZE]; //!< trace string
#endif

  //! for mapping of UVLC to syntaxElement
  void    (*mapping)(int len, int info, int *value1, int *value2);
  //! used for CABAC: refers to actual coding method of each individual syntax element type
  void  (*reading)(struct syntaxelement *, struct inp_par *, struct img_par *, DecodingEnvironmentPtr);

} SyntaxElement;

//! Macroblock
typedef struct macroblock