global.h

一个264程序在NS2下面的仿真程序。非常好用

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <time.h>

#define CODEC_VER 1.7
#define NAL_D 0x00000001
#define NAL_DSIZE 4
#define START 0.0 
#define HEADERSIZE 28 

/********************/
/* TYPE DEFINITIONS */
/********************/

/* Structure that defines each element of the linked list */
struct nal_u{
  int pos, size, zero_bit, nal_ref_idc, nal_type; 

    /* Added for files coded with version 1.7 */
  int packet_type, error_ind;  

  struct nal_u *next;
};
typedef struct nal_u nalu;
typedef nalu *nal;

/* Structure for storing values of bit reading operations */
struct readbitsresult{
  int value,bytesread,bitpos;
};
typedef struct readbitsresult read_bits_result;

read_bits_result readbits(unsigned char *pt, int bitpos, int length);
read_bits_result expgolomb(unsigned char *pt, int bitpos);
read_bits_result uvlc(unsigned char *pt, int bitpos);


/* NAL Unit deader decoding operations */
int dec_nal_u(unsigned char *pt);

/* Config file operatiobs */
void parsefile(char* name);

/* Flag for initializing random number generator's seed */
int first;


/* Global variables */
int currentframe;
float framerate;
int marking;
int format;
int pattern;

/* 1: QCIF, 2: CIF */
char bitstream[32];
char outputfile[32];