constant.h

大师写的二代小波经典之作

/*
 *  -*- Mode: ANSI C -*-
 *  $Id: constant.h,v 1.4 1996/08/16 17:23:18 fernande Exp $
 *  $Source: /sgi.acct/sweldens/cvs/liftpack/include/constant.h,v $
 *  Author: Peter Schroder
 *  Modified: Gabriel Fernandez
 *
 *  This header file contains declaration of constants that
 *  are commonly used in most programs.
 */
/* do not edit anything above this line */

#ifndef __CONSTANT_H__
#define __CONSTANT_H__

#include "flwtdef.h"

/* epsilon used to compare to zero */
extern Flt m_eps_f;
/* clock ticks per second for runing time calculations */
#ifndef CLOCKS_PER_SEC
#define CLOCKS_PER_SEC	1e6
#endif
/* inverse powers of two */
extern Flt twomm[32];
/* inverse powers of sqrt(2) */
extern Flt twomhalfm[64];
/* ordinary powers of two */
extern Flt twom[32];
/* ordinary powers of sqrt(2) */
extern Flt twohalfm[64];
/* integer powers of two */
extern int itwom[31];

#endif /* __CONSTANT_H__ */