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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@169 65c4cc65-6c06-0410-ace0-fbb531ad65f3
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Mark Spencer
2000-01-05 08:20:27 +00:00
parent 41567d7c5e
commit 6f0ba39ae5
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codecs/lpc10/placea.c Executable file
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/*
$Log$
Revision 1.1 2000/01/05 08:20:39 markster
Version 0.1.2 from FTP
Revision 1.2 2000/01/05 08:20:39 markster
Some OSS fixes and a few lpc changes to make it actually work
* Revision 1.1 1996/08/19 22:31:07 jaf
* Initial revision
*
*/
#ifdef P_R_O_T_O_T_Y_P_E_S
extern int placea_(integer *ipitch, integer *voibuf, integer *obound, integer *af, integer *vwin, integer *awin, integer *ewin, integer *lframe, integer *maxwin);
#endif
/* -- translated by f2c (version 19951025).
You must link the resulting object file with the libraries:
-lf2c -lm (in that order)
*/
#include "f2c.h"
/* *********************************************************************** */
/* PLACEA Version 48 */
/* $Log$
* Revision 1.1 2000/01/05 08:20:39 markster
* Version 0.1.2 from FTP
*
/* Revision 1.2 2000/01/05 08:20:39 markster
/* Some OSS fixes and a few lpc changes to make it actually work
/*
* Revision 1.1 1996/08/19 22:31:07 jaf
* Initial revision
* */
/* Revision 1.5 1996/03/19 20:41:55 jaf */
/* Added some conditions satisfied by the output values in EWIN. */
/* Revision 1.4 1996/03/19 20:24:17 jaf */
/* Added some conditions satisfied by the output values in AWIN. */
/* Revision 1.3 1996/03/18 21:40:04 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 16:43:09 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 14:48:31 jaf */
/* Initial revision */
/* *********************************************************************** */
/* Input: */
/* IPITCH */
/* VOIBUF */
/* Indices (2,AF-2), (1,AF-1), (2,AF-1), (1,AF), and (2,AF) read.*/
/* All other indices untouched. */
/* OBOUND */
/* AF */
/* VWIN */
/* Indices (1,AF) and (2,AF) read. */
/* All other indices untouched. */
/* LFRAME */
/* MAXWIN */
/* Input/Output: */
/* AWIN */
/* Index (1,AF-1) read. */
/* Indices (1,AF) and (2,AF) written, and then read. */
/* All other indices untouched. */
/* In all cases (except possibly one), the final values will */
/* satisfy the condition: AWIN(2,AF)-AWIN(1,AF)+1 = MAXWIN. */
/* In that other case, */
/* AWIN(1,AF)=VWIN(1,AF) and AWIN(2,AF)=VWIN(2,AF). */
/* Output: */
/* EWIN */
/* Indices (1,AF) and (2,AF) written. */
/* All other indices untouched. */
/* In all cases, the final values will satisfy the condition: */
/* AWIN(1,AF) .LE. EWIN(1,AF) .LE. EWIN(2,AF) .LE. AWIN(2,AF) */
/* In other words, the energy window is a sub-window of */
/* the analysis window. */
/* This subroutine has no local state. */
/* Subroutine */ int placea_(integer *ipitch, integer *voibuf, integer *
obound, integer *af, integer *vwin, integer *awin, integer *ewin,
integer *lframe, integer *maxwin)
{
/* System generated locals */
real r__1;
/* Builtin functions */
integer i_nint(real *);
/* Local variables */
logical allv, winv;
integer i__, j, k, l, hrange;
logical ephase;
integer lrange;
/* Arguments */
/* Local variables that need not be saved */
/* Parameter adjustments */
ewin -= 3;
awin -= 3;
vwin -= 3;
--voibuf;
/* Function Body */
lrange = (*af - 2) * *lframe + 1;
hrange = *af * *lframe;
/* Place the Analysis window based on the voicing window */
/* placement, onsets, tentative voicing decision, and pitch. */
/* Case 1: Sustained Voiced Speech */
/* If the five most recent voicing decisions are */
/* voiced, then the window is placed phase-synchronously with the */
/* previous window, as close to the present voicing window if possible.
*/
/* If onsets bound the voicing window, then preference is given to */
/* a phase-synchronous placement which does not overlap these onsets. */
/* Case 2: Voiced Transition */
/* If at least one voicing decision in AF is voicied, and there are no
*/
/* onsets, then the window is placed as in case 1. */
/* Case 3: Unvoiced Speech or Onsets */
/* If both voicing decisions in AF are unvoiced, or there are onsets, */
/* then the window is placed coincident with the voicing window. */
/* Note: During phase-synchronous placement of windows, the length */
/* is not altered from MAXWIN, since this would defeat the purpose */
/* of phase-synchronous placement. */
/* Check for case 1 and case 2 */
allv = voibuf[(*af - 2 << 1) + 2] == 1;
allv = allv && voibuf[(*af - 1 << 1) + 1] == 1;
allv = allv && voibuf[(*af - 1 << 1) + 2] == 1;
allv = allv && voibuf[(*af << 1) + 1] == 1;
allv = allv && voibuf[(*af << 1) + 2] == 1;
winv = voibuf[(*af << 1) + 1] == 1 || voibuf[(*af << 1) + 2] == 1;
if (allv || winv && *obound == 0) {
/* APHASE: Phase synchronous window placement. */
/* Get minimum lower index of the window. */
i__ = (lrange + *ipitch - 1 - awin[(*af - 1 << 1) + 1]) / *ipitch;
i__ *= *ipitch;
i__ += awin[(*af - 1 << 1) + 1];
/* L = the actual length of this frame's analysis window. */
l = *maxwin;
/* Calculate the location where a perfectly centered window would star
t. */
k = (vwin[(*af << 1) + 1] + vwin[(*af << 1) + 2] + 1 - l) / 2;
/* Choose the actual location to be the pitch multiple closest to this
. */
r__1 = (real) (k - i__) / *ipitch;
awin[(*af << 1) + 1] = i__ + i_nint(&r__1) * *ipitch;
awin[(*af << 1) + 2] = awin[(*af << 1) + 1] + l - 1;
/* If there is an onset bounding the right of the voicing window and t
he */
/* analysis window overlaps that, then move the analysis window backwa
rd */
/* to avoid this onset. */
if (*obound >= 2 && awin[(*af << 1) + 2] > vwin[(*af << 1) + 2]) {
awin[(*af << 1) + 1] -= *ipitch;
awin[(*af << 1) + 2] -= *ipitch;
}
/* Similarly for the left of the voicing window. */
if ((*obound == 1 || *obound == 3) && awin[(*af << 1) + 1] < vwin[(*
af << 1) + 1]) {
awin[(*af << 1) + 1] += *ipitch;
awin[(*af << 1) + 2] += *ipitch;
}
/* If this placement puts the analysis window above HRANGE, then */
/* move it backward an integer number of pitch periods. */
while(awin[(*af << 1) + 2] > hrange) {
awin[(*af << 1) + 1] -= *ipitch;
awin[(*af << 1) + 2] -= *ipitch;
}
/* Similarly if the placement puts the analysis window below LRANGE.
*/
while(awin[(*af << 1) + 1] < lrange) {
awin[(*af << 1) + 1] += *ipitch;
awin[(*af << 1) + 2] += *ipitch;
}
/* Make Energy window be phase-synchronous. */
ephase = TRUE_;
/* Case 3 */
} else {
awin[(*af << 1) + 1] = vwin[(*af << 1) + 1];
awin[(*af << 1) + 2] = vwin[(*af << 1) + 2];
ephase = FALSE_;
}
/* RMS is computed over an integer number of pitch periods in the analysis
*/
/*window. When it is not placed phase-synchronously, it is placed as clos
e*/
/* as possible to onsets. */
j = (awin[(*af << 1) + 2] - awin[(*af << 1) + 1] + 1) / *ipitch * *ipitch;
if (j == 0 || ! winv) {
ewin[(*af << 1) + 1] = vwin[(*af << 1) + 1];
ewin[(*af << 1) + 2] = vwin[(*af << 1) + 2];
} else if (! ephase && *obound == 2) {
ewin[(*af << 1) + 1] = awin[(*af << 1) + 2] - j + 1;
ewin[(*af << 1) + 2] = awin[(*af << 1) + 2];
} else {
ewin[(*af << 1) + 1] = awin[(*af << 1) + 1];
ewin[(*af << 1) + 2] = awin[(*af << 1) + 1] + j - 1;
}
return 0;
} /* placea_ */