#include "f2c.h"

Include dependency graph for synths.c:

Macros
#define	contrl_1 contrl_

Functions
int	synths_ (integer voice, integer pitch, real rms, real rc, real speech, integer k, struct lpc10_decoder_state *st)

Variables
static real	c_b2 = .7f

struct {
logical corrp

integer lframe

integer order

}	contrl_

Macro Definition Documentation

◆ contrl_1

#define contrl_1 contrl_

Definition at line 59 of file synths.c.

Function Documentation

◆ synths_()

int synths_	(	integer *	voice,
		integer *	pitch,
		real *	rms,
		real *	rc,
		real *	speech,
		integer *	k,
		struct lpc10_decoder_state *	st
	)

Definition at line 170 of file synths.c.

{
    /* Initialized data */
 
    real *buf;
    integer *buflen;
 
    /* System generated locals */
    integer i__1;
    real r__1, r__2;
 
    /* Local variables */
    real rmsi[16];
    integer nout, ivuv[16], i__, j;
    extern /* Subroutine */ int deemp_(real *, integer *, struct lpc10_decoder_state *);
    real ratio;
    integer ipiti[16];
    real g2pass;
    real pc[10];
    extern /* Subroutine */ int pitsyn_(integer *, integer *, integer *, real
        *, real *, integer *, integer *, integer *, real *, real *,
        integer *, real *, struct lpc10_decoder_state *);
    real rci[160]   /* was [10][16] */;
 
/* $Log$
 * Revision 1.16  2004/06/26 03:50:14  markster
 * Merge source cleanups (bug #1911)
 *
 * Revision 1.15  2003/09/27 02:45:37  markster
 * Fix various compiler warnings (bug #322)
 *
 * Revision 1.2  2003/09/27 02:45:37  markster
 * Fix various compiler warnings (bug #322)
 *
 * Revision 1.1.1.1  2003/02/12 13:59:15  matteo
 * mer feb 12 14:56:57 CET 2003
 *
 * Revision 1.2  2000/01/05 08:20:39  markster
 * Some OSS fixes and a few lpc changes to make it actually work
 *
 * Revision 1.2  1996/08/20  20:42:59  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  22:30:33  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 */
/*       Arguments */
/* $Log$
 * Revision 1.16  2004/06/26 03:50:14  markster
 * Merge source cleanups (bug #1911)
 *
 * Revision 1.15  2003/09/27 02:45:37  markster
 * Fix various compiler warnings (bug #322)
 *
 * Revision 1.2  2003/09/27 02:45:37  markster
 * Fix various compiler warnings (bug #322)
 *
 * Revision 1.1.1.1  2003/02/12 13:59:15  matteo
 * mer feb 12 14:56:57 CET 2003
 *
 * Revision 1.2  2000/01/05 08:20:39  markster
 * Some OSS fixes and a few lpc changes to make it actually work
 *
 * Revision 1.2  1996/08/20  20:42:59  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  22:30:33  jaf
 * Initial revision
 * */
/* Revision 1.3  1996/03/29  22:05:55  jaf */
/* Commented out the common block variables that are not needed by the */
/* embedded version. */
 
/* Revision 1.2  1996/03/26  19:34:50  jaf */
/* Added comments indicating which constants are not needed in an */
/* application that uses the LPC-10 coder. */
 
/* Revision 1.1  1996/02/07  14:44:09  jaf */
/* Initial revision */
 
/*   LPC Processing control variables: */
 
/* *** Read-only: initialized in setup */
 
/*  Files for Speech, Parameter, and Bitstream Input & Output, */
/*    and message and debug outputs. */
 
/* Here are the only files which use these variables: */
 
/* lpcsim.f setup.f trans.f error.f vqsetup.f */
 
/* Many files which use fdebug are not listed, since it is only used in */
/* those other files conditionally, to print trace statements. */
/*  integer fsi, fso, fpi, fpo, fbi, fbo, pbin, fmsg, fdebug */
/*  LPC order, Frame size, Quantization rate, Bits per frame, */
/*    Error correction */
/* Subroutine SETUP is the only place where order is assigned a value, */
/* and that value is 10.  It could increase efficiency 1% or so to */
/* declare order as a constant (i.e., a Fortran PARAMETER) instead of as
*/
/* a variable in a COMMON block, since it is used in many places in the */
/* core of the coding and decoding routines.  Actually, I take that back.
*/
/* At least when compiling with f2c, the upper bound of DO loops is */
/* stored in a local variable before the DO loop begins, and then that is
*/
/* compared against on each iteration. */
/* Similarly for lframe, which is given a value of MAXFRM in SETUP. */
/* Similarly for quant, which is given a value of 2400 in SETUP.  quant */
/* is used in only a few places, and never in the core coding and */
/* decoding routines, so it could be eliminated entirely. */
/* nbits is similar to quant, and is given a value of 54 in SETUP. */
/* corrp is given a value of .TRUE. in SETUP, and is only used in the */
/* subroutines ENCODE and DECODE.  It doesn't affect the speed of the */
/* coder significantly whether it is .TRUE. or .FALSE., or whether it is
*/
/* a constant or a variable, since it is only examined once per frame. */
/* Leaving it as a variable that is set to .TRUE.  seems like a good */
/* idea, since it does enable some error-correction capability for */
/* unvoiced frames, with no change in the coding rate, and no noticeable
*/
/* quality difference in the decoded speech. */
/*  integer quant, nbits */
/* *** Read/write: variables for debugging, not needed for LPC algorithm
*/
 
/*  Current frame, Unstable frames, Output clip count, Max onset buffer,
*/
/*    Debug listing detail level, Line count on listing page */
 
/* nframe is not needed for an embedded LPC10 at all. */
/* nunsfm is initialized to 0 in SETUP, and incremented in subroutine */
/* ERROR, which is only called from RCCHK.  When LPC10 is embedded into */
/* an application, I would recommend removing the call to ERROR in RCCHK,
*/
/* and remove ERROR and nunsfm completely. */
/* iclip is initialized to 0 in SETUP, and incremented in entry SWRITE in
*/
/* sread.f.  When LPC10 is embedded into an application, one might want */
/* to cause it to be incremented in a routine that takes the output of */
/* SYNTHS and sends it to an audio device.  It could be optionally */
/* displayed, for those that might want to know what it is. */
/* maxosp is never initialized to 0 in SETUP, although it probably should
*/
/* be, and it is updated in subroutine ANALYS.  I doubt that its value */
/* would be of much interest to an application in which LPC10 is */
/* embedded. */
/* listl and lincnt are not needed for an embedded LPC10 at all. */
/*  integer nframe, nunsfm, iclip, maxosp, listl, lincnt */
/*  common /contrl/ fsi, fso, fpi, fpo, fbi, fbo, pbin, fmsg, fdebug */
/*  common /contrl/ quant, nbits */
/*  common /contrl/ nframe, nunsfm, iclip, maxosp, listl, lincnt */
/*       Parameters/constants */
/*       Local variables that need not be saved */
/*       Local state */
/*       BUF is a buffer of speech samples that would have been returned
*/
/*       by the older version of SYNTHS, but the newer version doesn't, */
/*       so that the newer version can always return MAXFRM samples on */
/*       every call.  This has the effect of delaying the return of */
/*       samples for one additional frame time. */
 
/*       Indices 1 through BUFLEN contain samples that are left over from
*/
/*       the last call to SYNTHS.  Given the way that PITSYN works, */
/*       BUFLEN should always be in the range MAXFRM-MAXPIT+1 through */
/*       MAXFRM, inclusive, after a call to SYNTHS is complete. */
 
/*       On the first call to SYNTHS (or the first call after */
/*       reinitializing with the entry INITSYNTHS), BUFLEN is MAXFRM, and
*/
/*       a frame of silence is always returned. */
    /* Parameter adjustments */
    if (voice) {
    --voice;
    }
    if (rc) {
    --rc;
    }
    if (speech) {
    --speech;
    }
 
    /* Function Body */
    buf = &(st->buf[0]);
    buflen = &(st->buflen);
 
/* Computing MAX */
    i__1 = min(*pitch,156);
    *pitch = max(i__1,20);
    i__1 = contrl_1.order;
    for (i__ = 1; i__ <= i__1; ++i__) {
/* Computing MAX */
/* Computing MIN */
    r__2 = rc[i__];
    r__1 = min(r__2,.99f);
    rc[i__] = max(r__1,-.99f);
    }
    pitsyn_(&contrl_1.order, &voice[1], pitch, rms, &rc[1], &contrl_1.lframe,
        ivuv, ipiti, rmsi, rci, &nout, &ratio, st);
    if (nout > 0) {
    i__1 = nout;
    for (j = 1; j <= i__1; ++j) {
 
/*             Add synthesized speech for pitch period J to the en
d of */
/*             BUF. */
 
        irc2pc_(&rci[j * 10 - 10], pc, &contrl_1.order, &c_b2, &g2pass);
        bsynz_(pc, &ipiti[j - 1], &ivuv[j - 1], &buf[*buflen], &rmsi[j - 1]
            , &ratio, &g2pass, st);
        deemp_(&buf[*buflen], &ipiti[j - 1], st);
        *buflen += ipiti[j - 1];
    }
 
/*          Copy first MAXFRM samples from BUF to output array SPEECH
*/
/*          (scaling them), and then remove them from the beginning of
 */
/*          BUF. */
 
    for (i__ = 1; i__ <= 180; ++i__) {
        speech[i__] = buf[i__ - 1] / 4096.f;
    }
    *k = 180;
    *buflen += -180;
    i__1 = *buflen;
    for (i__ = 1; i__ <= i__1; ++i__) {
        buf[i__ - 1] = buf[i__ + 179];
    }
    }
    return 0;
} /* synths_ */