www.pudn.com > xiaobo.zip.zip > coder_sm_o0.c

/***** 
 
SigMap : send "significance map" then residual values 
 
order zero version 
 
-------- 
 
slightly better than plain order 0 
 
******/ 
 
#include  
#include  
#include  
#include  
#include  
#include  
 
extern int tune_param; 
 
/*** some convenient debug routines: 
** #define SEND_TAG()	if(0); else { arithEncode(ari,43,44,77); } 
** #define GET_TAG()	if(0); else { int got; got = arithGet(ari,77); arithDecode(ari,43,44,77); if ( got != 43 ) errexit("tag failure"); } 
********/ 
 
#define SMo0_ALPHABET		5	/** 0,1,-1,pos,neg **/ 
 
#define SMo0_TOTMAX		5000 
#define SMo0_INC			30 
 
#define ORDER0_TOTMAX		500 
#define ORDER0_ALPHABET		25 
#define ORDER0_ESCAPE		(ORDER0_ALPHABET-1) 
 
#include "coder.h" 
 
void coderSMo0_encodeBand(coder *me,int *band,int w,int h,int fullw,int *parent); 
void coderSMo0_decodeBand(coder *me,int *band,int w,int h,int fullw,int *parent); 
 
typedef struct { 
	ozero * o0; 
	scontext * o1; 
} myInfo; 
 
void coderSMo0_init(coder *c) 
{ 
myInfo *d; 
//int i; 
 
	if ( (d = new(myInfo)) == NULL ) 
		errexit("ozero init failed"); 
 
	c->data = d; 
 
	if ( (d->o0 = ozeroCreateMax(c->arith,ORDER0_ALPHABET,ORDER0_TOTMAX)) == NULL ) 
		errexit("ozero init failed"); 
 
	if ( (d->o1 = scontextCreate(c->arith,SMo0_ALPHABET,0, 
			SMo0_TOTMAX,SMo0_INC,true)) == NULL ) 
		errexit("context creation failed!"); 
 
} 
 
void coderSMo0_free(coder *c) 
{ 
	if ( c->data ) { 
		myInfo *d; 
		d = c->data; 
		if ( d->o0 ) ozeroFree(d->o0); 
		if ( d->o1 )  scontextFree(d->o1); 
		free(d); 
		c->data = NULL; 
	} 
} 
 
coder coderSMo0 = { 
		"SigMap o0", 
		coderSMo0_init, 
		coderSMo0_free, 
		coderSMo0_encodeBand, 
		coderSMo0_decodeBand 
	}; 
 
void coderSMo0_encodeBand(coder *me,int *band,int width,int height,int fullw,int *parent) 
{ 
int x,y,val; 
int *dp; 
ozero *o0 = ((myInfo *)me->data)->o0; 
scontext *o1 = ((myInfo *)me->data)->o1; 
arithInfo *ari = me->arith; 
 
	dp = band; 
	for(y=0;ydata)->o0; 
scontext *o1 = ((myInfo *)me->data)->o1; 
arithInfo *ari = me->arith; 
 
	dp = band; 
	for(y=0;y