placea.c

sloedgy open sip stack source code

/*

$Log: placea.c,v $
Revision 1.2  2007/03/04 03:00:58  joegenbaclor
Removed Linux compile warnings

Revision 1.1  2006/06/26 03:02:54  joegenbaclor
I have decided to include the latest development realease  of OPAL tagged Deimos Devel 1 (June 8 2006) as inegrated classes to opensipstack to avoid future version conflicts due to the fast pace in OPAL development.   This move is also aimed to reduce the size of projects using OPAL componets such as the soon to be relased OpenSIPPhone.

Revision 2.2  2005/08/08 03:28:42  dereksmithies
Eradicate all "/ * within comments" messages from GCC compilations.

Revision 2.1  2003/03/14 09:53:27  robertj
Updated to openH323 v1.11.7

Revision 1.2  2001/10/16 21:21:14  yurik
Removed warnings on Windows CE. Submitted by Jehan Bing, [e-mail]

Revision 1.1  2000/06/05 04:45:12  robertj
Added LPC-10 2400bps codec

 * 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: placea.c,v $
 * Revision 1.2  2007/03/04 03:00:58  joegenbaclor
 * Removed Linux compile warnings
 *
 * Revision 1.1  2006/06/26 03:02:54  joegenbaclor
 * I have decided to include the latest development realease  of OPAL tagged Deimos Devel 1 (June 8 2006) as inegrated classes to opensipstack to avoid future version conflicts due to the fast pace in OPAL development.   This move is also aimed to reduce the size of projects using OPAL componets such as the soon to be relased OpenSIPPhone.
 *
 * Revision 2.2  2005/08/08 03:28:42  dereksmithies
 * Eradicate all "/ * within comments" messages from GCC compilations.
 *
 * Revision 2.1  2003/03/14 09:53:27  robertj
 * Updated to openH323 v1.11.7
 *
 * Revision 1.2  2001/10/16 21:21:14  yurik
 * Removed warnings on Windows CE. Submitted by Jehan Bing, [e-mail]
 *
 * Revision 1.1  2000/06/05 04:45:12  robertj
 * Added LPC-10 2400bps codec
 *
 * 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_ */