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426 lines
15 KiB
C
426 lines
15 KiB
C
/*
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$Log$
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Revision 1.16 2004/06/26 03:50:14 markster
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Merge source cleanups (bug #1911)
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Revision 1.15 2003/09/27 02:45:37 markster
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Fix various compiler warnings (bug #322)
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Revision 1.2 2003/09/27 02:45:37 markster
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Fix various compiler warnings (bug #322)
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Revision 1.1.1.1 2003/02/12 13:59:15 matteo
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mer feb 12 14:56:57 CET 2003
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Revision 1.2 2000/01/05 08:20:39 markster
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Some OSS fixes and a few lpc changes to make it actually work
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* Revision 1.2 1996/08/20 20:42:59 jaf
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* Removed all static local variables that were SAVE'd in the Fortran
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* code, and put them in struct lpc10_decoder_state that is passed as an
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* argument.
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*
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* Removed init function, since all initialization is now done in
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* init_lpc10_decoder_state().
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*
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* Revision 1.1 1996/08/19 22:30:33 jaf
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* Initial revision
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*
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*/
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/* -- translated by f2c (version 19951025).
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You must link the resulting object file with the libraries:
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-lf2c -lm (in that order)
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*/
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#include "f2c.h"
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#ifdef P_R_O_T_O_T_Y_P_E_S
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extern int synths_(integer *voice, integer *pitch, real *rms, real *rc, real *speech, integer *k, struct lpc10_decoder_state *st);
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/* comlen contrl_ 12 */
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/*:ref: pitsyn_ 14 12 4 4 4 6 6 4 4 4 6 6 4 6 */
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/*:ref: irc2pc_ 14 5 6 6 4 6 6 */
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/*:ref: bsynz_ 14 7 6 4 4 6 6 6 6 */
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/*:ref: deemp_ 14 2 6 4 */
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/*:ref: initpitsyn_ 14 0 */
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/*:ref: initbsynz_ 14 0 */
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/*:ref: initdeemp_ 14 0 */
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#endif
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/* Common Block Declarations */
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extern struct {
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integer order, lframe;
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logical corrp;
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} contrl_;
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#define contrl_1 contrl_
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/* Table of constant values */
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static real c_b2 = .7f;
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/* ***************************************************************** */
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/* SYNTHS Version 54 */
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/* $Log$
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* Revision 1.16 2004/06/26 03:50:14 markster
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* Merge source cleanups (bug #1911)
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*
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* Revision 1.15 2003/09/27 02:45:37 markster
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* Fix various compiler warnings (bug #322)
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*
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* Revision 1.2 2003/09/27 02:45:37 markster
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* Fix various compiler warnings (bug #322)
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*
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* Revision 1.1.1.1 2003/02/12 13:59:15 matteo
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* mer feb 12 14:56:57 CET 2003
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*
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* Revision 1.2 2000/01/05 08:20:39 markster
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* Some OSS fixes and a few lpc changes to make it actually work
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*
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* Revision 1.2 1996/08/20 20:42:59 jaf
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* Removed all static local variables that were SAVE'd in the Fortran
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* code, and put them in struct lpc10_decoder_state that is passed as an
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* argument.
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*
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* Removed init function, since all initialization is now done in
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* init_lpc10_decoder_state().
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*
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* Revision 1.1 1996/08/19 22:30:33 jaf
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* Initial revision
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* */
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/* Revision 1.5 1996/03/26 19:31:58 jaf */
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/* Commented out trace statements. */
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/* Revision 1.4 1996/03/25 19:41:01 jaf */
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/* Changed so that MAXFRM samples are always returned in the output array */
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/* SPEECH. */
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/* This required delaying the returned samples by MAXFRM sample times, */
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/* and remembering any "left over" samples returned by PITSYN from one */
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/* call of SYNTHS to the next. */
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/* Changed size of SPEECH from 2*MAXFRM to MAXFRM. Removed local */
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/* variable SOUT. Added local state variables BUF and BUFLEN. */
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/* Revision 1.3 1996/03/25 19:20:10 jaf */
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/* Added comments about the range of possible return values for argument */
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/* K, and increased the size of the arrays filled in by PITSYN from 11 to */
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/* 16, as has been already done inside of PITSYN. */
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/* Revision 1.2 1996/03/22 00:18:18 jaf */
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/* Added comments explaining meanings of input and output parameters, and */
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/* indicating which array indices can be read or written. */
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/* Added entry INITSYNTHS, which does nothing except call the */
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/* corresponding initialization entries for subroutines PITSYN, BSYNZ, */
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/* and DEEMP. */
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/* Revision 1.1 1996/02/07 14:49:44 jaf */
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/* Initial revision */
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/* ***************************************************************** */
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/* The note below is from the distributed version of the LPC10 coder. */
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/* The version of the code below has been modified so that SYNTHS always */
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/* has a constant frame length output of MAXFRM. */
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/* Also, BSYNZ and DEEMP need not be modified to work on variable */
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/* positions within an array. It is only necessary to pass the first */
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/* index desired as the array argument. What actually gets passed is the */
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/* address of that array position, which the subroutine treats as the */
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/* first index of the array. */
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/* This technique is used in subroutine ANALYS when calling PREEMP, so it */
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/* appears that multiple people wrote different parts of this LPC10 code, */
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/* and that they didn't necessarily have equivalent knowledge of Fortran */
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/* (not surprising). */
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/* NOTE: There is excessive buffering here, BSYNZ and DEEMP should be */
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/* changed to operate on variable positions within SOUT. Also, */
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/* the output length parameter is bogus, and PITSYN should be */
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/* rewritten to allow a constant frame length output. */
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/* Input: */
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/* VOICE - Half frame voicing decisions */
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/* Indices 1 through 2 read. */
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/* Input/Output: */
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/* PITCH - Pitch */
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/* PITCH is restricted to range 20 to 156, inclusive, */
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/* before calling subroutine PITSYN, and then PITSYN */
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/* can modify it further under some conditions. */
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/* RMS - Energy */
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/* Only use is for debugging, and passed to PITSYN. */
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/* See comments there for how it can be modified. */
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/* RC - Reflection coefficients */
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/* Indices 1 through ORDER restricted to range -.99 to .99, */
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/* before calling subroutine PITSYN, and then PITSYN */
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/* can modify it further under some conditions. */
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/* Output: */
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/* SPEECH - Synthesized speech samples. */
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/* Indices 1 through the final value of K are written. */
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/* K - Number of samples placed into array SPEECH. */
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/* This is always MAXFRM. */
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/* Subroutine */ int synths_(integer *voice, integer *pitch, real *
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rms, real *rc, real *speech, integer *k, struct lpc10_decoder_state *st)
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{
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/* Initialized data */
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real *buf;
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integer *buflen;
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/* System generated locals */
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integer i__1;
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real r__1, r__2;
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/* Local variables */
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real rmsi[16];
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integer nout, ivuv[16], i__, j;
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extern /* Subroutine */ int deemp_(real *, integer *, struct lpc10_decoder_state *);
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real ratio;
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integer ipiti[16];
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real g2pass;
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real pc[10];
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extern /* Subroutine */ int pitsyn_(integer *, integer *, integer *, real
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*, real *, integer *, integer *, integer *, real *, real *,
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integer *, real *, struct lpc10_decoder_state *);
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real rci[160] /* was [10][16] */;
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/* $Log$
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* Revision 1.16 2004/06/26 03:50:14 markster
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* Merge source cleanups (bug #1911)
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*
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* Revision 1.15 2003/09/27 02:45:37 markster
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* Fix various compiler warnings (bug #322)
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*
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* Revision 1.2 2003/09/27 02:45:37 markster
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* Fix various compiler warnings (bug #322)
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*
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* Revision 1.1.1.1 2003/02/12 13:59:15 matteo
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* mer feb 12 14:56:57 CET 2003
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*
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* Revision 1.2 2000/01/05 08:20:39 markster
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* Some OSS fixes and a few lpc changes to make it actually work
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*
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* Revision 1.2 1996/08/20 20:42:59 jaf
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* Removed all static local variables that were SAVE'd in the Fortran
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* code, and put them in struct lpc10_decoder_state that is passed as an
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* argument.
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*
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* Removed init function, since all initialization is now done in
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* init_lpc10_decoder_state().
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*
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* Revision 1.1 1996/08/19 22:30:33 jaf
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* Initial revision
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* */
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/* Revision 1.3 1996/03/29 22:03:47 jaf */
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/* Removed definitions for any constants that were no longer used. */
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/* Revision 1.2 1996/03/26 19:34:33 jaf */
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/* Added comments indicating which constants are not needed in an */
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/* application that uses the LPC-10 coder. */
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/* Revision 1.1 1996/02/07 14:43:51 jaf */
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/* Initial revision */
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/* LPC Configuration parameters: */
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/* Frame size, Prediction order, Pitch period */
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/* Arguments */
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/* $Log$
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* Revision 1.16 2004/06/26 03:50:14 markster
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* Merge source cleanups (bug #1911)
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*
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* Revision 1.15 2003/09/27 02:45:37 markster
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* Fix various compiler warnings (bug #322)
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*
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* Revision 1.2 2003/09/27 02:45:37 markster
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* Fix various compiler warnings (bug #322)
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*
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* Revision 1.1.1.1 2003/02/12 13:59:15 matteo
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* mer feb 12 14:56:57 CET 2003
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*
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* Revision 1.2 2000/01/05 08:20:39 markster
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* Some OSS fixes and a few lpc changes to make it actually work
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*
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* Revision 1.2 1996/08/20 20:42:59 jaf
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* Removed all static local variables that were SAVE'd in the Fortran
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* code, and put them in struct lpc10_decoder_state that is passed as an
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* argument.
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*
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* Removed init function, since all initialization is now done in
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* init_lpc10_decoder_state().
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*
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* Revision 1.1 1996/08/19 22:30:33 jaf
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* Initial revision
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* */
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/* Revision 1.3 1996/03/29 22:05:55 jaf */
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/* Commented out the common block variables that are not needed by the */
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/* embedded version. */
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/* Revision 1.2 1996/03/26 19:34:50 jaf */
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/* Added comments indicating which constants are not needed in an */
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/* application that uses the LPC-10 coder. */
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/* Revision 1.1 1996/02/07 14:44:09 jaf */
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/* Initial revision */
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/* LPC Processing control variables: */
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/* *** Read-only: initialized in setup */
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/* Files for Speech, Parameter, and Bitstream Input & Output, */
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/* and message and debug outputs. */
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/* Here are the only files which use these variables: */
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/* lpcsim.f setup.f trans.f error.f vqsetup.f */
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/* Many files which use fdebug are not listed, since it is only used in */
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/* those other files conditionally, to print trace statements. */
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/* integer fsi, fso, fpi, fpo, fbi, fbo, pbin, fmsg, fdebug */
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/* LPC order, Frame size, Quantization rate, Bits per frame, */
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/* Error correction */
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/* Subroutine SETUP is the only place where order is assigned a value, */
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/* and that value is 10. It could increase efficiency 1% or so to */
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/* declare order as a constant (i.e., a Fortran PARAMETER) instead of as
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*/
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/* a variable in a COMMON block, since it is used in many places in the */
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/* core of the coding and decoding routines. Actually, I take that back.
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*/
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/* At least when compiling with f2c, the upper bound of DO loops is */
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/* stored in a local variable before the DO loop begins, and then that is
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*/
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/* compared against on each iteration. */
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/* Similarly for lframe, which is given a value of MAXFRM in SETUP. */
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/* Similarly for quant, which is given a value of 2400 in SETUP. quant */
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/* is used in only a few places, and never in the core coding and */
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/* decoding routines, so it could be eliminated entirely. */
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/* nbits is similar to quant, and is given a value of 54 in SETUP. */
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/* corrp is given a value of .TRUE. in SETUP, and is only used in the */
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/* subroutines ENCODE and DECODE. It doesn't affect the speed of the */
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/* coder significantly whether it is .TRUE. or .FALSE., or whether it is
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*/
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/* a constant or a variable, since it is only examined once per frame. */
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/* Leaving it as a variable that is set to .TRUE. seems like a good */
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/* idea, since it does enable some error-correction capability for */
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/* unvoiced frames, with no change in the coding rate, and no noticeable
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*/
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/* quality difference in the decoded speech. */
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/* integer quant, nbits */
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/* *** Read/write: variables for debugging, not needed for LPC algorithm
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*/
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/* Current frame, Unstable frames, Output clip count, Max onset buffer,
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*/
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/* Debug listing detail level, Line count on listing page */
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/* nframe is not needed for an embedded LPC10 at all. */
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/* nunsfm is initialized to 0 in SETUP, and incremented in subroutine */
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/* ERROR, which is only called from RCCHK. When LPC10 is embedded into */
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/* an application, I would recommend removing the call to ERROR in RCCHK,
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*/
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/* and remove ERROR and nunsfm completely. */
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/* iclip is initialized to 0 in SETUP, and incremented in entry SWRITE in
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*/
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/* sread.f. When LPC10 is embedded into an application, one might want */
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/* to cause it to be incremented in a routine that takes the output of */
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/* SYNTHS and sends it to an audio device. It could be optionally */
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/* displayed, for those that might want to know what it is. */
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/* maxosp is never initialized to 0 in SETUP, although it probably should
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*/
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/* be, and it is updated in subroutine ANALYS. I doubt that its value */
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/* would be of much interest to an application in which LPC10 is */
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/* embedded. */
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/* listl and lincnt are not needed for an embedded LPC10 at all. */
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/* integer nframe, nunsfm, iclip, maxosp, listl, lincnt */
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/* common /contrl/ fsi, fso, fpi, fpo, fbi, fbo, pbin, fmsg, fdebug */
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/* common /contrl/ quant, nbits */
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/* common /contrl/ nframe, nunsfm, iclip, maxosp, listl, lincnt */
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/* Parameters/constants */
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/* Local variables that need not be saved */
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/* Local state */
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/* BUF is a buffer of speech samples that would have been returned
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*/
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/* by the older version of SYNTHS, but the newer version doesn't, */
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/* so that the newer version can always return MAXFRM samples on */
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/* every call. This has the effect of delaying the return of */
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/* samples for one additional frame time. */
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/* Indices 1 through BUFLEN contain samples that are left over from
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*/
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/* the last call to SYNTHS. Given the way that PITSYN works, */
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/* BUFLEN should always be in the range MAXFRM-MAXPIT+1 through */
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/* MAXFRM, inclusive, after a call to SYNTHS is complete. */
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/* On the first call to SYNTHS (or the first call after */
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/* reinitializing with the entry INITSYNTHS), BUFLEN is MAXFRM, and
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*/
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/* a frame of silence is always returned. */
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/* Parameter adjustments */
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if (voice) {
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--voice;
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}
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if (rc) {
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--rc;
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}
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if (speech) {
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--speech;
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}
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/* Function Body */
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buf = &(st->buf[0]);
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buflen = &(st->buflen);
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/* Computing MAX */
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i__1 = min(*pitch,156);
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*pitch = max(i__1,20);
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i__1 = contrl_1.order;
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for (i__ = 1; i__ <= i__1; ++i__) {
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/* Computing MAX */
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/* Computing MIN */
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r__2 = rc[i__];
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r__1 = min(r__2,.99f);
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rc[i__] = max(r__1,-.99f);
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}
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pitsyn_(&contrl_1.order, &voice[1], pitch, rms, &rc[1], &contrl_1.lframe,
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ivuv, ipiti, rmsi, rci, &nout, &ratio, st);
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if (nout > 0) {
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i__1 = nout;
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for (j = 1; j <= i__1; ++j) {
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/* Add synthesized speech for pitch period J to the en
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d of */
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/* BUF. */
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irc2pc_(&rci[j * 10 - 10], pc, &contrl_1.order, &c_b2, &g2pass);
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bsynz_(pc, &ipiti[j - 1], &ivuv[j - 1], &buf[*buflen], &rmsi[j - 1]
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, &ratio, &g2pass, st);
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deemp_(&buf[*buflen], &ipiti[j - 1], st);
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*buflen += ipiti[j - 1];
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}
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/* Copy first MAXFRM samples from BUF to output array SPEECH
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*/
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/* (scaling them), and then remove them from the beginning of
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*/
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/* BUF. */
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for (i__ = 1; i__ <= 180; ++i__) {
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speech[i__] = buf[i__ - 1] / 4096.f;
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}
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*k = 180;
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*buflen += -180;
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i__1 = *buflen;
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for (i__ = 1; i__ <= i__1; ++i__) {
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buf[i__ - 1] = buf[i__ + 179];
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}
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}
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return 0;
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} /* synths_ */
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