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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@612 65c4cc65-6c06-0410-ace0-fbb531ad65f3
98 lines
2.3 KiB
C
Executable File
98 lines
2.3 KiB
C
Executable File
/*
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$Log$
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Revision 1.14 2003/02/12 13:59:15 matteo
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mer feb 12 14:56:57 CET 2003
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Revision 1.1.1.1 2003/02/12 13:59:15 matteo
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mer feb 12 14:56:57 CET 2003
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Revision 1.2 2000/01/05 08:20:39 markster
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Some OSS fixes and a few lpc changes to make it actually work
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* Revision 1.1 1996/08/19 22:32:17 jaf
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* Initial revision
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*
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*/
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#ifdef P_R_O_T_O_T_Y_P_E_S
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extern int energy_(integer *len, real *speech, real *rms);
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#endif
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/* -- translated by f2c (version 19951025).
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You must link the resulting object file with the libraries:
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-lf2c -lm (in that order)
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*/
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#include "f2c.h"
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/* ********************************************************************* */
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/* ENERGY Version 50 */
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/* $Log$
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* Revision 1.14 2003/02/12 13:59:15 matteo
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* mer feb 12 14:56:57 CET 2003
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*
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/* Revision 1.1.1.1 2003/02/12 13:59:15 matteo
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/* mer feb 12 14:56:57 CET 2003
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/*
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/* Revision 1.2 2000/01/05 08:20:39 markster
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/* Some OSS fixes and a few lpc changes to make it actually work
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/*
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* Revision 1.1 1996/08/19 22:32:17 jaf
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* Initial revision
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* */
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/* Revision 1.3 1996/03/18 21:17:41 jaf */
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/* Just added a few comments about which array indices of the arguments */
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/* are used, and mentioning that this subroutine has no local state. */
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/* Revision 1.2 1996/03/13 16:46:02 jaf */
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/* Comments added explaining that none of the local variables of this */
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/* subroutine need to be saved from one invocation to the next. */
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/* Revision 1.1 1996/02/07 14:45:40 jaf */
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/* Initial revision */
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/* ********************************************************************* */
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/* Compute RMS energy. */
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/* Input: */
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/* LEN - Length of speech buffer */
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/* SPEECH - Speech buffer */
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/* Indices 1 through LEN read. */
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/* Output: */
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/* RMS - Root Mean Square energy */
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/* This subroutine has no local state. */
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/* Subroutine */ int energy_(integer *len, real *speech, real *rms)
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{
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/* System generated locals */
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integer i__1;
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/* Builtin functions */
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double sqrt(doublereal);
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/* Local variables */
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integer i__;
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/* Arguments */
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/* Local variables that need not be saved */
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/* Parameter adjustments */
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--speech;
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/* Function Body */
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*rms = 0.f;
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i__1 = *len;
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for (i__ = 1; i__ <= i__1; ++i__) {
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*rms += speech[i__] * speech[i__];
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}
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*rms = sqrt(*rms / *len);
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return 0;
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} /* energy_ */
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