ref: c1e92600b65fc8d7671bbd2ce7ac8d9671371999
dir: /lpc10/placev.c/
/*
* Revision 1.1 1996/08/19 22:31:02 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 placev_(integer *osbuf, integer *osptr, integer *oslen, integer *obound, integer *vwin, integer *af, integer *lframe, integer *minwin, integer *maxwin, integer *dvwinl, integer *dvwinh);
/* ****************************************************************** */
/* PLACEV Version 48 */
/*
* Revision 1.1 1996/08/19 22:31:02 jaf
* Initial revision
* */
/* Revision 1.6 1996/03/19 20:42:19 jaf */
/* Added some conditions satisfied by the output values in VWIN. */
/* Revision 1.5 1996/03/19 18:37:56 jaf */
/* Strengthened the specification of which indices of VWIN are read and */
/* written. */
/* Revision 1.4 1996/03/15 16:38:33 jaf */
/* One tiny comment added. */
/* Revision 1.3 1996/03/15 16:36:13 jaf */
/* Added comments giving In/Out status of arguments. */
/* Revision 1.2 1996/03/12 23:56:01 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 14:48:39 jaf */
/* Initial revision */
/* ****************************************************************** */
/* Input: */
/* OSBUF Buffer which holds sorted indexes of onsets */
/* I believe that only indices 1 through OSPTR-1 can be read. */
/* OSLEN */
/* OSPTR Free pointer into OSBUF */
/* AF */
/* LFRAME */
/* MINWIN */
/* MAXWIN */
/* DVWINL */
/* DVWINH (This argument is never used. Should it be?) */
/* Input/Output: */
/* VWIN Buffer of Voicing Window Positions (Modified) */
/* Index (2,AF-1) is read. */
/* Indices (1,AF) and (2,AF) are written, */
/* and then possibly read. */
/* All other indices are unused. */
/* In all cases, the final values will satsify the condition:*/
/* VWIN(2,AF)-VWIN(1,AF)+1 .LE. MAXWIN */
/* I'm not certain yet, but they may also satisfy: */
/* MINWIN .LE. VWIN(2,AF)-VWIN(1,AF)+1 */
/* Output: */
/* OBOUND This variable is set by this procedure and used */
/* in placing analysis windows (PLACEA). Bit 1 */
/* indicates whether an onset bounds the left side */
/* of the voicing window, and bit 2 indicates whether */
/* an onset bounds the right side of the voicing window. */
/* This subroutine has no local state. */
/* Subroutine */ int placev_(integer *osbuf, integer *osptr, integer *oslen,
integer *obound, integer *vwin, integer *af, integer *lframe, integer
*minwin, integer *maxwin, integer *dvwinl, integer *dvwinh)
{
/* System generated locals */
integer i__1, i__2;
/* Local variables */
logical crit;
integer i__, q, osptr1, hrange, lrange;
/* Arguments */
/* Local variables that need not be saved */
/* Variables */
/* LRANGE, HRANGE Range in which window is placed */
/* OSPTR1 OSPTR excluding samples in 3F */
/* Local state */
/* None */
/* Voicing Window Placement */
/* __________________ __________________ ______________ */
/* | | | */
/* | 1F | 2F | 3F ... */
/* |__________________|__________________|______________ */
/* Previous | */
/* Window | */
/* ...________| */
/* | | */
/* ------>| This window's placement range |<------ */
/* | | */
/* There are three cases. Note that these are different from those */
/* given in the LPC-10e phase 1 report. */
/* 1. If there are no onsets in this range, then the voicing window */
/* is centered in the pitch window. If such a placement is not within
*/
/* the window's placement range, then the window is placed in the left-
*/
/* most portion of the placement range. Its length is always MAXWIN. */
/* 2. If the first onset is in 2F and there is sufficient room to place
*/
/* the window immediately before this onset, then the window is placed
*/
/* there, and its length is set to the maximum possible under these */
/* constraints. */
/* "Critical Region Exception": If there is another onset in 2F */
/* such that a window can be placed between the two onsets, the */
/* window is placed there (ie, as in case 3). */
/* 3. Otherwise, the window is placed immediately after the onset. The
*/
/* window's length */
/* is the longest length that can fit in the range under these constraint
s,*/
/* except that the window may be shortened even further to avoid overlapp
ing*/
/* other onsets in the placement range. In any case, the window's length
*/
/* is at least MINWIN. */
/* Note that the values of MINWIN and LFRAME must be chosen such */
/* that case 2 = false implies case 3 = true. This means that */
/* MINWIN <= LFRAME/2. If this were not the case, then a fourth case */
/* would have to be added for when the window cannot fit either before
*/
/* or after the onset. */
/* Note also that onsets which weren't in 2F last time may be in 1F this
*/
/* time, due to the filter delays in computing onsets. The result is tha
t*/
/* occasionally a voicing window will overlap that onset. The only way
*/
/* to circumvent this problem is to add more delay in processing input
*/
/* speech. In the trade-off between delay and window-placement, window
*/
/* placement lost. */
/* Compute the placement range */
/* Parameter adjustments */
(void)oslen;
(void)dvwinh;
--osbuf;
vwin -= 3;
/* Function Body */
/* Computing MAX */
i__1 = vwin[((*af - 1) << 1) + 2] + 1, i__2 = (*af - 2) * *lframe + 1;
lrange = max(i__1,i__2);
hrange = *af * *lframe;
/* Compute OSPTR1, so the following code only looks at relevant onsets. */
for (osptr1 = *osptr - 1; osptr1 >= 1; --osptr1) {
if (osbuf[osptr1] <= hrange) {
goto L90;
}
}
L90:
++osptr1;
/* Check for case 1 first (fast case): */
if (osptr1 <= 1 || osbuf[osptr1 - 1] < lrange) {
/* Computing MAX */
i__1 = vwin[((*af - 1) << 1) + 2] + 1;
vwin[(*af << 1) + 1] = max(i__1,*dvwinl);
vwin[(*af << 1) + 2] = vwin[(*af << 1) + 1] + *maxwin - 1;
*obound = 0;
} else {
/* Search backward in OSBUF for first onset in range. */
/* This code relies on the above check being performed first. */
for (q = osptr1 - 1; q >= 1; --q) {
if (osbuf[q] < lrange) {
goto L100;
}
}
L100:
++q;
/* Check for case 2 (placement before onset): */
/* Check for critical region exception: */
i__1 = osptr1 - 1;
for (i__ = q + 1; i__ <= i__1; ++i__) {
if (osbuf[i__] - osbuf[q] >= *minwin) {
crit = TRUE_;
goto L105;
}
}
crit = FALSE_;
L105:
/* Computing MAX */
i__1 = (*af - 1) * *lframe, i__2 = lrange + *minwin - 1;
if (! crit && osbuf[q] > max(i__1,i__2)) {
vwin[(*af << 1) + 2] = osbuf[q] - 1;
/* Computing MAX */
i__1 = lrange, i__2 = vwin[(*af << 1) + 2] - *maxwin + 1;
vwin[(*af << 1) + 1] = max(i__1,i__2);
*obound = 2;
/* Case 3 (placement after onset) */
} else {
vwin[(*af << 1) + 1] = osbuf[q];
L110:
++q;
if (q >= osptr1) {
goto L120;
}
if (osbuf[q] > vwin[(*af << 1) + 1] + *maxwin) {
goto L120;
}
if (osbuf[q] < vwin[(*af << 1) + 1] + *minwin) {
goto L110;
}
vwin[(*af << 1) + 2] = osbuf[q] - 1;
*obound = 3;
return 0;
L120:
/* Computing MIN */
i__1 = vwin[(*af << 1) + 1] + *maxwin - 1;
vwin[(*af << 1) + 2] = min(i__1,hrange);
*obound = 1;
}
}
return 0;
} /* placev_ */