defines.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

/*
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* COPYRIGHT AND WARRANTY INFORMATION
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* Copyright 2001, International Telecommunications Union, Geneva
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/*!
 **************************************************************************
 * \file defines.h
 *
 * \brief
 *    Headerfile containing some useful global definitions
 *
 * \author
 *    Detlev Marpe 
 *    Copyright (C) 2000 HEINRICH HERTZ INSTITUTE All Rights Reserved.
 *
 * \date
 *    21. March 2001
 **************************************************************************
 */


#ifndef _DEFINES_H_
#define _DEFINES_H_


#define TRACE           0   //!< 0:Trace off 1:Trace on

// APJ: Added the following define
#define PROFILE_IDC     66
#define LEVEL_IDC       21

// CAVLC
#define LUMA              0
#define LUMA_INTRA16x16DC 1
#define LUMA_INTRA16x16AC 2

#define LEVEL_NUM      6
#define TOTRUN_NUM    15
#define RUNBEFORE_NUM  7

#define  MAX_NO_POC_FRAMES  10  //size of poc ref array
#define NONREFFRAME 0           // used with push_poc
#define REFFRAME 1


//--- block types for CABAC
#define LUMA_16DC       0
#define LUMA_16AC       1
#define LUMA_8x8        2
#define LUMA_8x4        3
#define LUMA_4x8        4
#define LUMA_4x4        5
#define CHROMA_DC       6
#define CHROMA_AC       7
#define NUM_BLOCK_TYPES 8


#define clamp(a,b,c) ( (a)<(b) ? (b) : ((a)>(c)?(c):(a)) )    //!< clamp a to the range of [b;c]


// Constants for the interim file format
#define WORKING_DRAFT_MAJOR_NO 0    // inidicate the working draft version number
#define WORKING_DRAFT_MINOR_NO 4
#define INTERIM_FILE_MAJOR_NO 0     // indicate interim file format version number
#define INTERIM_FILE_MINOR_NO 1

#define _FAST_FULL_ME_
#define _FULL_SEARCH_RANGE_
#define _ADAPT_LAST_GROUP_
#define _CHANGE_QP_
#define _ADDITIONAL_REFERENCE_FRAME_
#define _LEAKYBUCKET_

// #define _CHECK_MULTI_BUFFER_1_
// #define _CHECK_MULTI_BUFFER_2_

// ---------------------------------------------------------------------------------
// FLAGS and DEFINES for new chroma intra prediction, Dzung Hoang
// Threshold values to zero out quantized transform coefficients.
// Recommend that _CHROMA_COEFF_COST_ be low to improve chroma quality
#define _LUMA_COEFF_COST_       4 //!< threshold for luma coeffs
#define _CHROMA_COEFF_COST_     4 //!< threshold for chroma coeffs, used to be 7

#define IMG_PAD_SIZE    4   //!< Number of pixels padded around the reference frame (>=4)

#define BDIRECTINTRA        1        //!< Direct SpatioTemporal Prediction 

#define absm(A) ((A)<(0) ? (-(A)):(A)) //!< abs macro, faster than procedure
#define MAX_VALUE       999999   //!< used for start value for some variables

#define Clip1(a)            ((a)>255?255:((a)<0?0:(a)))
#define Clip3(min,max,val) (((val)<(min))?(min):(((val)>(max))?(max):(val)))

#define P8x8    8
#define I4MB    9
#define I16MB   10
#define IBLOCK  11
#define SI4MB   12
#define MAXMODE 13

#define  LAMBDA_ACCURACY_BITS         16
#define  LAMBDA_FACTOR(lambda)        ((int)((double)(1<<LAMBDA_ACCURACY_BITS)*lambda+0.5))
#define  WEIGHTED_COST(factor,bits)   (((factor)*(bits))>>LAMBDA_ACCURACY_BITS)
#define  MV_COST(f,s,cx,cy,px,py)     (WEIGHTED_COST(f,mvbits[((cx)<<(s))-px]+mvbits[((cy)<<(s))-py]))
#define  REF_COST(f,ref)              (WEIGHTED_COST(f,refbits[(ref)]))

#define  BWD_IDX(ref)                 (((ref)<2)? 1-(ref): (ref))
#define  REF_COST_FWD(f,ref)          (WEIGHTED_COST(f,((img->num_ref_pic_active_fwd_minus1==0)? 0:refbits[(ref)])))
#define  REF_COST_BWD(f,ref)          (WEIGHTED_COST(f,((img->num_ref_pic_active_bwd_minus1==0)? 0:BWD_IDX(refbits[ref]))))

#define IS_INTRA(MB)    ((MB)->mb_type==I4MB  || (MB)->mb_type==I16MB)
#define IS_NEWINTRA(MB) ((MB)->mb_type==I16MB)
#define IS_OLDINTRA(MB) ((MB)->mb_type==I4MB)
#define IS_INTER(MB)    ((MB)->mb_type!=I4MB  && (MB)->mb_type!=I16MB)
#define IS_INTERMV(MB)  ((MB)->mb_type!=I4MB  && (MB)->mb_type!=I16MB  && (MB)->mb_type!=0)
#define IS_DIRECT(MB)   ((MB)->mb_type==0     && (img ->   type==B_IMG || img ->type==BS_IMG))
// #define IS_DIRECT(MB)   ((MB)->mb_type==0     && img ->   type==B_IMG)
#define IS_COPY(MB)     ((MB)->mb_type==0     && img ->   type==INTER_IMG);
#define IS_P8x8(MB)     ((MB)->mb_type==P8x8)

// Quantization parameter range

#define MIN_QP          0
#define MAX_QP          51
#define SHIFT_QP        12

// Picture types
#define INTRA_IMG       0   //!< I frame
#define INTER_IMG       1   //!< P frame
#define B_IMG           2   //!< B frame
#define SP_IMG          3   //!< SP frame

#define BS_IMG          4   //!< BS frame


// Direct Mode types
#define DIR_TEMPORAL    0   //!< Temporal Direct Mode
#define DIR_SPATIAL     1    //!< Spatial Direct Mode

#define MAX_REFERENCE_PICTURES 15

#define BLOCK_SIZE      4
#define MB_BLOCK_SIZE   16

#define NO_INTRA_PMODE  9        //!< #intra prediction modes
//!< 4x4 intra prediction modes
#define VERT_PRED             0
#define HOR_PRED              1
#define DC_PRED               2
#define DIAG_DOWN_LEFT_PRED   3
#define DIAG_DOWN_RIGHT_PRED  4
#define VERT_RIGHT_PRED       5
#define HOR_DOWN_PRED         6
#define VERT_LEFT_PRED        7
#define HOR_UP_PRED           8

// 16x16 intra prediction modes
#define VERT_PRED_16    0
#define HOR_PRED_16     1
#define DC_PRED_16      2
#define PLANE_16        3

// 8x8 chroma intra prediction modes
#define DC_PRED_8       0
#define HOR_PRED_8      1
#define VERT_PRED_8     2
#define PLANE_8         3

/*
// image formats
#define SUB_QCIF        0       // GH added picture formats
#define QCIF            1
#define CIF             2
#define CIF_4           3       // GH added picture formats
#define CIF_16          4       // GH added picture formats
#define CUSTOM          5       // GH added picture formats

// QCIF format
#define IMG_WIDTH       176
#define IMG_HEIGHT      144
#define IMG_WIDTH_CR    88
#define IMG_HEIGHT_CR   72
*/

#define INIT_FRAME_RATE 30
#define EOS             1         //!< End Of Sequence


#define MVPRED_MEDIAN   0
#define MVPRED_L        1
#define MVPRED_U        2
#define MVPRED_UR       3


#define BLOCK_MULTIPLE      (MB_BLOCK_SIZE/BLOCK_SIZE)

#define MAX_SYMBOLS_PER_MB  1200  //!< Maximum number of different syntax elements for one MB
                                  // CAVLC needs more symbols per MB


#define MAX_PART_NR     3 /*!< Maximum number of different data partitions.
                               Some reasonable number which should reflect
                               what is currently defined in the SE2Partition map (elements.h) */

#define MAXPICTURETYPESEQUENCELEN 100   /*!< Maximum size of the string that defines the picture
                                             types to be coded, e.g. "IBBPBBPBB" */
//Start code and Emulation Prevention need this to be defined in identical manner at encoder and decoder
#define ZEROBYTES_SHORTSTARTCODE 2 //indicates the number of zero bytes in the short start-code prefix
#define BIPRED_SIMPLE 1

#endif