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  )

extern

Definition at line 94 of file tbdm.c.

{
    /* 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_ */

References difmag_(), max, and min.

Referenced by analys_().