tbdm.c File Reference

#include "f2c.h"

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Functions
int	tbdm_ (real *speech, integer *lpita, integer *tau, integer *ltau, real *amdf, integer *minptr, integer *maxptr, integer *mintau)

Function Documentation

tbdm_()

int tbdm_	(	real *	speech,
		integer *	lpita,
		integer *	tau,
		integer *	ltau,
		real *	amdf,
		integer *	minptr,
		integer *	maxptr,
		integer *	mintau
	)

Definition at line 94 of file tbdm.c.

References difmag_(), max, and min.

Referenced by analys_().

{
 /* System generated locals */
 integer i__1, i__2, i__3, i__4;

 /* Local variables */
 real amdf2[6];
 integer minp2, ltau2, maxp2, i__;
 extern /* Subroutine */ int difmag_(real *, integer *, integer *, integer
 *, integer *, real *, integer *, integer *);
 integer minamd, ptr, tau2[6];

/* Arguments */
/* REAL SPEECH(LPITA+TAU(LTAU)), AMDF(LTAU) */
/* Stupid TOAST doesn't understand expressions */
/* Local variables that need not be saved */
/* Local state */
/* None */
/* Compute full AMDF using log spaced lags, find coarse minimum */
 /* Parameter adjustments */
 --speech;
 --amdf;
 --tau;

 /* Function Body */
 difmag_(&speech[1], lpita, &tau[1], ltau, &tau[*ltau], &amdf[1], minptr,
 maxptr);
 *mintau = tau[*minptr];
 minamd = (integer)amdf[*minptr];
/* Build table containing all lags within +/- 3 of the AMDF minimum */
/* excluding all that have already been computed */
 ltau2 = 0;
 ptr = *minptr - 2;
/* Computing MAX */
 i__1 = *mintau - 3;
/* Computing MIN */
 i__3 = *mintau + 3, i__4 = tau[*ltau] - 1;
 i__2 = min(i__3,i__4);
 for (i__ = max(i__1,41); i__ <= i__2; ++i__) {
 while(tau[ptr] < i__) {
 ++ptr;
 }
 if (tau[ptr] != i__) {
 ++ltau2;
 tau2[ltau2 - 1] = i__;
 }
 }
/* Compute AMDF of the new lags, if there are any, and choose one */
/* if it is better than the coarse minimum */
 if (ltau2 > 0) {
 difmag_(&speech[1], lpita, tau2, &ltau2, &tau[*ltau], amdf2, &minp2, &
 maxp2);
 if (amdf2[minp2 - 1] < (real) minamd) {
 *mintau = tau2[minp2 - 1];
 minamd = (integer)amdf2[minp2 - 1];
 }
 }
/* Check one octave up, if there are any lags not yet computed */
 if (*mintau >= 80) {
 i__ = *mintau / 2;
 if ((i__ & 1) == 0) {
 ltau2 = 2;
 tau2[0] = i__ - 1;
 tau2[1] = i__ + 1;
 } else {
 ltau2 = 1;
 tau2[0] = i__;
 }
 difmag_(&speech[1], lpita, tau2, &ltau2, &tau[*ltau], amdf2, &minp2, &
 maxp2);
 if (amdf2[minp2 - 1] < (real) minamd) {
 *mintau = tau2[minp2 - 1];
 minamd = (integer)amdf2[minp2 - 1];
 *minptr += -20;
 }
 }
/* Force minimum of the AMDF array to the high resolution minimum */
 amdf[*minptr] = (real) minamd;
/* Find maximum of AMDF within 1/2 octave of minimum */
/* Computing MAX */
 i__2 = *minptr - 5;
 *maxptr = max(i__2,1);
/* Computing MIN */
 i__1 = *minptr + 5;
 i__2 = min(i__1,*ltau);
 for (i__ = *maxptr + 1; i__ <= i__2; ++i__) {
 if (amdf[i__] > amdf[*maxptr]) {
 *maxptr = i__;
 }
 }
 return 0;
} /* tbdm_ */