www.pudn.com > wavecode.rar > coder_o0.c

#include  
#include  
#include  
#include  
#include  
 
#define TOT_MAX		4000 
#define ALPHABET	128 
#define ESCAPE		(ALPHABET-1) 
 
#include "coder.h" 
 
void coderOzero_encodeBand(coder *me,int *band,int w,int h,int fullw,int *parent); 
void coderOzero_decodeBand(coder *me,int *band,int w,int h,int fullw,int *parent); 
 
#include  
 
struct O0coderInfoNew { 
	struct FAI * arith; 
	long numChars; 
	context * order0; 
  }; 
 
 
void coderOzero_init(coder *me) 
{ 
	if ( (me->data = ozeroCreateMax(me->arith,ALPHABET,TOT_MAX)) == NULL ) 
		errexit("ozero init failed"); 
} 
void coderOzero_free(coder *me) 
{ 
ozero *oz; 
	oz = (ozero *)me->data; 
	if ( oz ) { 
		int p,c; 
		for(c=0;corder0,c+1) - 1; 
			if ( p > 0 ) printf("%3d : %d\n",c,p); 
		} 
		printf("tot : %d\n",contextGetCumProb(((struct O0coderInfoNew *)oz)->order0,ALPHABET)-ALPHABET); 
		ozeroFree(oz); 
	} 
} 
 
coder coderOzero = { 
		"order 0", 
		coderOzero_init, 
		coderOzero_free, 
		coderOzero_encodeBand, 
		coderOzero_decodeBand 
	}; 
 
void coderOzero_encodeBand(coder *me,int *band,int width,int height,int fullw,int *parent) 
{ 
int x,y,v,sign; 
int *dp; 
ozero *oz = me->data; 
arithInfo *ari = me->arith; 
 
	dp = band; 
	for(y=0;y= ESCAPE ) { 
				ozeroEncode(oz,ESCAPE); 
				v -= ESCAPE; 
			} 
			ozeroEncode(oz,v); 
			arithBit(ari,sign); 
		} 
		dp += (fullw - width); 
	} 
} 
 
void coderOzero_decodeBand(coder *me,int *band,int width,int height,int fullw,int *parent) 
{ 
int x,y,v,got,sign; 
int *dp; 
arithInfo *ari = me->arith; 
ozero *oz = me->data; 
 
	dp = band; 
	for(y=0;y