energy.c

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/*

$Log$
Revision 1.15 2004/06/26 03:50:14 markster
Merge source cleanups (bug #1911)

Revision 1.14 2003/02/12 13:59:15 matteo
mer feb 12 14:56:57 CET 2003

Revision 1.1.1.1 2003/02/12 13:59:15 matteo
mer feb 12 14:56:57 CET 2003

Revision 1.2 2000/01/05 08:20:39 markster
Some OSS fixes and a few lpc changes to make it actually work

 * Revision 1.1 1996/08/19 22:32:17 jaf
 * Initial revision
 *

*/

/* -- translated by f2c (version 19951025).
 You must link the resulting object file with the libraries:
 -lf2c -lm (in that order)
*/

#include "f2c.h"

#ifdef P_R_O_T_O_T_Y_P_E_S
extern int energy_(integer *len, real *speech, real *rms);
#endif

/* ********************************************************************* */

/* ENERGY Version 50 */

/* $Log$
 * Revision 1.15 2004/06/26 03:50:14 markster
 * Merge source cleanups (bug #1911)
 *
 * Revision 1.14 2003/02/12 13:59:15 matteo
 * mer feb 12 14:56:57 CET 2003
 *
 * Revision 1.1.1.1 2003/02/12 13:59:15 matteo
 * mer feb 12 14:56:57 CET 2003
 *
 * Revision 1.2 2000/01/05 08:20:39 markster
 * Some OSS fixes and a few lpc changes to make it actually work
 *
 * Revision 1.1 1996/08/19 22:32:17 jaf
 * Initial revision
 * */
/* Revision 1.3 1996/03/18 21:17:41 jaf */
/* Just added a few comments about which array indices of the arguments */
/* are used, and mentioning that this subroutine has no local state. */

/* Revision 1.2 1996/03/13 16:46:02 jaf */
/* Comments added explaining that none of the local variables of this */
/* subroutine need to be saved from one invocation to the next. */

/* Revision 1.1 1996/02/07 14:45:40 jaf */
/* Initial revision */


/* ********************************************************************* */

/* Compute RMS energy. */

/* Input: */
/* LEN - Length of speech buffer */
/* SPEECH - Speech buffer */
/* Indices 1 through LEN read. */
/* Output: */
/* RMS - Root Mean Square energy */

/* This subroutine has no local state. */

/* Subroutine */ int energy_(integer *len, real *speech, real *rms)
{
 /* System generated locals */
 integer i__1;

 /* Builtin functions */
 double sqrt(doublereal);

 /* Local variables */
 integer i__;

/* Arguments */
/* Local variables that need not be saved */
 /* Parameter adjustments */
 --speech;

 /* Function Body */
 *rms = 0.f;
 i__1 = *len;
 for (i__ = 1; i__ <= i__1; ++i__) {
 *rms += speech[i__] * speech[i__];
 }
 *rms = (real)sqrt(*rms / *len);
 return 0;
} /* energy_ */