arith.h File Reference

#include "buff.h"

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Data Structures
struct	distrib_t
struct	code_arith
Defines
#define	PREC_TOTAL   32
#define	PREC_INTER   ((2 * PREC_TOTAL) / 3)
#define	PREC_PROBA   (PREC_TOTAL - PREC_INTER)
#define	distrib_get_proba(d, i)   ((d).prob[(i) - (d).min])
Typedefs
typedef struct code_arith *	arith_t
Functions
arith_t	arith_init (struct buff *b)
int	coder (int i, distrib_t d, arith_t state)
int	coder_uniforme (unsigned long i, unsigned long n, arith_t state)
int	coder_bin_fin (int i, arith_t state)
int	decoder (distrib_t d, int *lettre, arith_t state)
unsigned long	decoder_uniforme (unsigned long n, unsigned long *lettre, arith_t state)
int	decoder_bin_fin (arith_t state)
int	tester_fin (arith_t state)
int	tester_compteur (arith_t state)

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Define Documentation

#define distrib_get_proba	(	d,
		i		)	((d).prob[(i) - (d).min])

Definition at line 35 of file arith.h.

Referenced by coder(), decoder(), dicho_si_lb_node(), dicho_si_node(), init_proba(), update_delta(), and write_precomp().

#define PREC_INTER   ((2 * PREC_TOTAL) / 3)

Definition at line 27 of file arith.h.

Referenced by adjust_delta(), ajuster(), arith_init(), coder(), coder_uniforme(), decoder(), decoder_uniforme(), dicho_searchmin(), dicho_si_from_list(), dicho_si_lb_leaf(), dicho_si_lb_node(), and leaf_info().

#define PREC_PROBA   (PREC_TOTAL - PREC_INTER)

Definition at line 28 of file arith.h.

Referenced by coder(), decoder(), dicho(), dicho_si_lb_node(), dicho_si_node(), dichoinv(), init_proba(), leaf_info(), and update_delta().

#define PREC_TOTAL   32

Definition at line 26 of file arith.h.

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Typedef Documentation

typedef struct code_arith * arith_t

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Function Documentation

arith_t arith_init

(

struct buff *

b

)

Definition at line 69 of file arith.c.

References code_arith::buffer, code_arith::compteur, code_arith::max, code_arith::min, and PREC_INTER.

Referenced by dicho_b2cw(), and dicho_cw2b().

int coder	(	int	i,
		distrib_t	d,
		arith_t	state
	)

Definition at line 137 of file arith.c.

References ajuster(), code_arith::buffer, bwrite_lock(), code_arith::compteur, distrib_get_proba, distrib_t::max, code_arith::max, code_arith::min, PREC_INTER, and PREC_PROBA.

Referenced by dicho_rec().

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int coder_bin_fin	(	int	i,
		arith_t	state
	)

int coder_uniforme	(	unsigned long	i,
		unsigned long	n,
		arith_t	state
	)

Definition at line 176 of file arith.c.

References ajuster(), code_arith::buffer, bwrite_lock(), code_arith::compteur, code_arith::max, code_arith::min, and PREC_INTER.

Referenced by dicho().

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int decoder	(	distrib_t	d,
		int *	lettre,
		arith_t	state
	)

Definition at line 223 of file arith.c.

References ajuster(), blook(), bread_lock(), bstep(), code_arith::buffer, chercher(), code_arith::compteur, distrib_get_proba, distrib_t::max, code_arith::max, distrib_t::min, code_arith::min, PREC_INTER, PREC_PROBA, and distrib_t::prob.

Referenced by dichoinv_rec().

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int decoder_bin_fin

(

arith_t

state

)

unsigned long decoder_uniforme	(	unsigned long	n,
		unsigned long *	lettre,
		arith_t	state
	)

Definition at line 289 of file arith.c.

References ajuster(), blook(), bread_lock(), bstep(), code_arith::buffer, code_arith::compteur, code_arith::max, code_arith::min, and PREC_INTER.

Referenced by dichoinv().

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int tester_compteur

(

arith_t

state

)

int tester_fin

(

arith_t

state

)