/************************************************* * libr263: fast H.263 encoder library * * Copyright (C) 1996, Roalt Aalmoes, Twente University * SPA multimedia group * * Based on Telenor TMN 1.6 encoder (Copyright (C) 1995, Telenor R&D) * created by Karl Lillevold  * * Author encoder: Roalt Aalmoes, <aalmoes@huygens.nl> *  * Date: 31-07-96 **************************************************/#include "rlib.h"#ifndef LIBR263_H#define LIBR263_H/* This should not be changed */#define MB_SIZE 16/* Order of usage of lib263:   1. Assign size of frame type to "format" field and call InitCompress()   2. WriteByteFunction = OwnWriteFunction  (1 and 2 in arbitrary order)   3. Set cparams and do CompressQCIFToH263(cparams) with INTRA encoding   4. Set cparams and do CompressQCIFToH263(cparams) with either INTRA       or INTER encoding   5. redo 4. or to stop do 6   6. CloseCompress() *//* Compression parameter structure */#define CPARAM_INTER TRUE#define CPARAM_INTRA FALSE#define CPARAM_EXHAUSTIVE TRUE#define CPARAM_LOGARITHMIC FALSE#define CPARAM_ADVANCED TRUE#define CPARAM_NOADVANCED FALSE#define CPARAM_QCIF 0#define CPARAM_CIF 1#define CPARAM_4CIF 2#define CPARAM_16CIF 3#define CPARAM_SQCIF 4#define CPARAM_OTHER 99#define CPARAM_DEFAULT_INTER_Q 8#define CPARAM_DEFAULT_INTRA_Q 8#define CPARAM_DEFAULT_SEARCHWINDOW 3#define CPARAM_DEFAULT_INTER CPARAM_INTRA#define CPARAM_DEFAULT_SEARCH_METHOD CPARAM_LOGARITHMIC#define CPARAM_DEFAULT_ADVANCED_METHOD CPARAM_NOADVANCED#define CPARAM_DEFAULT_FORMAT CPARAM_QCIFtypedef struct compression_parameters {/* Contains all the parameters that are needed for    encoding plus all the status between two encodings */  int half_pixel_searchwindow; /* size of search window in half pixels				  if this value is 0, no search is performed				*/  int format;			/*  */  int pels;			/* Only used when format == CPARAM_OTHER */  int lines;			/* Only used when format == CPARAM_OTHER */  int inter;			/* TRUE of INTER frame encoded frames,				   FALSE for INTRA frames */  int search_method;		/* DEF_EXHAUSTIVE or DEF_LOGARITHMIC */  int advanced_method;		/* TRUE : Use array to determine 				          macroblocks in INTER frame					  mode to be encoded */  int Q_inter;			/* Quantization factor for INTER frames */  int Q_intra;			/* Quantization factor for INTRA frames */  unsigned int *data;		/* source data in qcif format */  unsigned int *interpolated_lum;	/* intepolated recon luminance part */  unsigned int *recon;		/* Reconstructed copy of compressed frame */  int *EncodeThisBlock;                                 /* Array when advanced_method is used */} CParam;/* Structure for counted bits */typedef struct bits_counted {  int Y;  int C;  int vec;  int CBPY;  int CBPCM;  int MODB;  int CBPB;  int COD;  int header;  int DQUANT;  int total;  int no_inter;  int no_inter4v;  int no_intra;/* NB: Remember to change AddBits(), ZeroBits() and AddBitsPicture()    when entries are added here */} Bits;typedef void (*WriteByte) (int);/* Global variable */extern WriteByte WriteByteFunction;/* Prototypes */int CompressToH263(CParam *params, Bits *bits);int InitCompress(CParam *params);void CloseCompress(CParam *params);void SkipH263Frames(int frames_to_skip);/* Procedure to detect motion, expects param->EncodeThisBlock is set to   array.    Advised values for threshold: mb_threholds = 2; pixel_threshold = 2 */int FindMotion(CParam *params, int mb_threshold, int pixel_threshold);#endif