pitsyn.c

sloedgy open sip stack source code

/*

$Log: pitsyn.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  2002/02/15 03:57:55  yurik
Warnings removed during compilation, patch courtesy of Jehan Bing, [e-mail]

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

 * Revision 1.2  1996/08/20  20:40:12  jaf
 * Removed all static local variables that were SAVE'd in the Fortran
 * code, and put them in struct lpc10_decoder_state that is passed as an
 * argument.
 *
 * Removed init function, since all initialization is now done in
 * init_lpc10_decoder_state().
 *
 * Revision 1.1  1996/08/19  22:31:12  jaf
 * Initial revision
 *

*/

#ifdef P_R_O_T_O_T_Y_P_E_S
extern int pitsyn_(integer *order, integer *voice, integer *pitch, real *rms, real *rc, integer *lframe, integer *ivuv, integer *ipiti, real *rmsi, real *rci, integer *nout, real *ratio, struct lpc10_decoder_state *st);
#endif

/*  -- translated by f2c (version 19951025).
   You must link the resulting object file with the libraries:
	-lf2c -lm   (in that order)
*/

#include "f2c.h"

/* ***************************************************************** */

/* 	PITSYN Version 53 

 * $Log: pitsyn.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  2002/02/15 03:57:55  yurik
 * Warnings removed during compilation, patch courtesy of Jehan Bing, [e-mail]
 *
 * Revision 1.1  2000/06/05 04:45:12  robertj
 * Added LPC-10 2400bps codec
 *
 * Revision 1.2  1996/08/20  20:40:12  jaf
 * Removed all static local variables that were SAVE'd in the Fortran
 * code, and put them in struct lpc10_decoder_state that is passed as an
 * argument.
 *
 * Removed init function, since all initialization is now done in
 * init_lpc10_decoder_state().
 *
 * Revision 1.1  1996/08/19  22:31:12  jaf
 * Initial revision
 * */
/* Revision 1.2  1996/03/25  18:49:07  jaf */
/* Added commments about which indices of array arguments are read or */
/* written. */

/* Rearranged local variable declarations to indicate which need to be */
/* saved from one invocation to the next.  Added entry INITPITSYN to */
/* reinitialize local state variables, if desired. */

/* Added lots of comments about proving that the maximum number of pitch */
/* periods (NOUT) that can be returned is 16.  The call to STOP that */
/* could happen if NOUT got too large was removed as a result. */

/* Also proved that the total number of samples returned from N calls, */
/* each with identical values of LFRAME, will always be in the range */
/* N*LFRAME-MAXPIT+1 to N*LFRAME. */

/* Revision 1.1  1996/02/07 14:48:18  jaf */
/* Initial revision */


/* ***************************************************************** */

/*   Synthesize a single pitch epoch */

/* Input: */
/*  ORDER  - Synthesis order (number of RC's) */
/*  VOICE  - Half frame voicing decisions */
/*           Indices 1 through 2 read. */
/*  LFRAME - Length of speech buffer */
/* Input/Output: */
/*  PITCH  - Pitch */
/*           This value should be in the range MINPIT (20) to MAXPIT */
/*           (156), inclusive. */
/*           PITCH can be modified under some conditions. */
/*  RMS    - Energy  (can be modified) */
/*           RMS is changed to 1 if the value passed in is less than 1. */
/*  RC     - Reflection coefficients */
/*           Indices 1 through ORDER can be temporarily overwritten with */
/*           RCO, and then replaced with original values, under some */
/*           conditions. */
/* Output: */
/*  IVUV   - Pitch epoch voicing decisions */
/*           Indices (I) of IVUV, IPITI, and RMSI are written, */
/*           and indices (J,I) of RCI are written, */
/*           where I ranges from 1 to NOUT, and J ranges from 1 to ORDER. */
/*  IPITI  - Pitch epoch length */
/*  RMSI   - Pitch epoch energy */
/*  RCI    - Pitch epoch RC's */
/*  NOUT   - Number of pitch periods in this frame */
/*           This is at least 0, at least 1 if MAXPIT .LT. LFRAME (this */
/*           is currently true on every call), and can never be more than */
/*           (LFRAME+MAXPIT-1)/PITCH, which is currently 16 with */
/*           LFRAME=180, MAXPIT=156, and PITCH .GE. 20, as SYNTHS */
/*           guarantees when it calls this subroutine. */
/*  RATIO  - Previous to present energy ratio */
/*           Always assigned a value. */

/* Subroutine */ int pitsyn_(integer *order, integer *voice, 
	integer *pitch, real *rms, real *rc, integer *lframe, integer *ivuv, 
	integer *ipiti, real *rmsi, real *rci, integer *nout, real *ratio,
			       struct lpc10_decoder_state *st)
{
    /* Initialized data */

    real *rmso;
    logical *first;

    /* System generated locals */
    integer rci_dim1 = 0, rci_offset = 0, i__1, i__2 = 0;
    real r__1;

    /* Builtin functions */
    double log(doublereal), exp(doublereal);

    /* Local variables */
    real alrn, alro, yarc[10], prop;
    integer i__, j, vflag, jused, lsamp;
    integer *jsamp;
    real slope;
    integer *ipito;
    real uvpit;
    integer ip, nl, ivoice;
    integer *ivoico;
    integer istart;
    real *rco;
    real xxy;

/*       Arguments 
 * $Log: pitsyn.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  2002/02/15 03:57:55  yurik
 * Warnings removed during compilation, patch courtesy of Jehan Bing, [e-mail]
 *
 * Revision 1.1  2000/06/05 04:45:12  robertj
 * Added LPC-10 2400bps codec
 *
 * Revision 1.2  1996/08/20  20:40:12  jaf
 * Removed all static local variables that were SAVE'd in the Fortran
 * code, and put them in struct lpc10_decoder_state that is passed as an
 * argument.
 *
 * Removed init function, since all initialization is now done in
 * init_lpc10_decoder_state().
 *
 * Revision 1.1  1996/08/19  22:31:12  jaf
 * Initial revision
 * */
/* Revision 1.3  1996/03/29  22:03:47  jaf */
/* Removed definitions for any constants that were no longer used. */

/* Revision 1.2  1996/03/26  19:34:33  jaf */
/* Added comments indicating which constants are not needed in an */
/* application that uses the LPC-10 coder. */

/* Revision 1.1  1996/02/07  14:43:51  jaf */
/* Initial revision */

/*   LPC Configuration parameters: */
/* Frame size, Prediction order, Pitch period */
/*       Local variables that need not be saved */
/*       LSAMP is initialized in the IF (FIRST) THEN clause, but it is */
/*       not used the first time through, and it is given a value before 
*/
/*       use whenever FIRST is .FALSE., so it appears unnecessary to */
/*       assign it a value when FIRST is .TRUE. */
/*       Local state */
/* FIRST  - .TRUE. only on first call to PITSYN. */
/* IVOICO - Previous VOICE(2) value. */
/* IPITO  - Previous PITCH value. */
/* RMSO   - Previous RMS value. */
/* RCO    - Previous RC values. */

/* JSAMP  - If this routine is called N times with identical values of */
/*          LFRAME, then the total length of all pitch periods returned */
/*          is always N*LFRAME-JSAMP, and JSAMP is always in the range 0 
*/
/*          to MAXPIT-1 (see below for why this is so).  Thus JSAMP is */
/*          the number of samples "left over" from the previous call to */
/*          PITSYN, that haven't been "used" in a pitch period returned */
/*          from this subroutine.  Every time this subroutine is called, 
*/
/*          it returns pitch periods with a total length of at most */
/*          LFRAME+JSAMP. */

/* IVOICO, IPITO, RCO, and JSAMP need not be assigned an initial value */
/* with a DATA statement, because they are always initialized on the */
/* first call to PITSYN. */

/* FIRST and RMSO should be initialized with DATA statements, because */
/* even on the first call, they are used before being initialized. */
    /* Parameter adjustments */
    if (rc) {
	--rc;
	}
    if (rci) {
	rci_dim1 = *order;
	rci_offset = rci_dim1 + 1;
	rci -= rci_offset;
	}
    if (voice) {
	--voice;
	}
    if (ivuv) {
	--ivuv;
	}
    if (ipiti) {
	--ipiti;
	}
    if (rmsi) {
	--rmsi;
	}

    /* Function Body */
    ivoico = &(st->ivoico);
    ipito = &(st->ipito);
    rmso = &(st->rmso);
    rco = &(st->rco[0]);
    jsamp = &(st->jsamp);
    first = &(st->first_pitsyn);

    if (*rms < 1.f) {
	*rms = 1.f;
    }
    if (*rmso < 1.f) {
	*rmso = 1.f;
    }
    uvpit = 0.f;
    *ratio = *rms / (*rmso + 8.f);
    if (*first) {
	lsamp = 0;
	ivoice = voice[2];
	if (ivoice == 0) {
	    *pitch = *lframe / 4;
	}
	*nout = *lframe / *pitch;
	*jsamp = *lframe - *nout * *pitch;

/*          SYNTHS only calls this subroutine with PITCH in the range 
20 */
/*          to 156.  LFRAME = MAXFRM = 180, so NOUT is somewhere in th
e */
/*          range 1 to 9. */

/*          JSAMP is "LFRAME mod PITCH", so it is in the range 0 to */
/*          (PITCH-1), or 0 to MAXPIT-1=155, after the first call. */