ref: f88f10a371df2080d5dc0b9be60563791ac01aca
dir: /lpc10/energy.c/
/*
* 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"
extern int energy_(integer *len, real *speech, real *rms);
/* ********************************************************************* */
/* ENERGY Version 50 */
/*
* 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 = sqrt(*rms / *len);
return 0;
} /* energy_ */