/*
$Log: lpcenc.c,v $
Revision 1.1.1.1 2002/07/28 05:23:31 freeman_yong
lpc10 codec
* Revision 1.2 1996/08/20 20:31:21 jaf
* Removed all static local variables that were SAVE'd in the Fortran
* code, and put them in struct lpc10_encoder_state that is passed as an
* argument.
*
* Removed init function, since all initialization is now done in
* init_lpc10_encoder_state().
*
* Changed name of function from lpcenc_ to lpc10_encode, simply to make
* all lpc10 functions have more consistent naming with each other.
*
* Revision 1.1 1996/08/19 22:31:44 jaf
* Initial revision
*
*/
#ifdef P_R_O_T_O_T_Y_P_E_S
extern int lpcenc_(real *speech, integer *bits);
extern int initlpcenc_(void);
/*:ref: prepro_ 14 2 6 4 */
/*:ref: analys_ 14 5 6 4 4 6 6 */
/*:ref: encode_ 14 7 4 4 6 6 4 4 4 */
/*:ref: chanwr_ 14 5 4 4 4 4 4 */
/*:ref: initprepro_ 14 0 */
/*:ref: initanalys_ 14 0 */
#endif
/* -- translated by f2c (version 19951025).
You must link the resulting object file with the libraries:
-lf2c -lm (in that order)
*/
#include "f2c.h"
/* Table of constant values */
static integer c__180 = 180;
static integer c__10 = 10;
/* ***************************************************************** */
/* $Log: lpcenc.c,v $
/* Revision 1.1.1.1 2002/07/28 05:23:31 freeman_yong
/* lpc10 codec
/*
* Revision 1.2 1996/08/20 20:31:21 jaf
* Removed all static local variables that were SAVE'd in the Fortran
* code, and put them in struct lpc10_encoder_state that is passed as an
* argument.
*
* Removed init function, since all initialization is now done in
* init_lpc10_encoder_state().
*
* Changed name of function from lpcenc_ to lpc10_encode, simply to make
* all lpc10 functions have more consistent naming with each other.
*
* Revision 1.1 1996/08/19 22:31:44 jaf
* Initial revision
* */
/* Revision 1.2 1996/03/28 00:01:22 jaf */
/* Commented out some trace statements. */
/* Revision 1.1 1996/03/28 00:00:27 jaf */
/* Initial revision */
/* ***************************************************************** */
/* Encode one frame of 180 speech samples to 54 bits. */
/* Input: */
/* SPEECH - Speech encoded as real values in the range [-1,+1]. */
/* Indices 1 through 180 read, and modified (by PREPRO). */
/* Output: */
/* BITS - 54 encoded bits, stored 1 per array element. */
/* Indices 1 through 54 written. */
/* This subroutine maintains local state from one call to the next. If */
/* you want to switch to using a new audio stream for this filter, or */
/* reinitialize its state for any other reason, call the ENTRY */
/* INITLPCENC. */
/* Subroutine */ int lpc10_encode(real *speech, integer *bits,
struct lpc10_encoder_state *st)
{
integer irms, voice[2], pitch, ipitv;
real rc[10];
extern /* Subroutine */ int encode_(integer *, integer *, real *, real *,
integer *, integer *, integer *), chanwr_(integer *, integer *,
integer *, integer *, integer *, struct lpc10_encoder_state *),
analys_(real *, integer *,
integer *, real *, real *, struct lpc10_encoder_state *),
prepro_(real *, integer *, struct lpc10_encoder_state *);
integer irc[10];
real rms;
/* Arguments */
/* $Log: lpcenc.c,v $
/* Revision 1.1.1.1 2002/07/28 05:23:31 freeman_yong
/* lpc10 codec
/*
* Revision 1.2 1996/08/20 20:31:21 jaf
* Removed all static local variables that were SAVE'd in the Fortran
* code, and put them in struct lpc10_encoder_state that is passed as an
* argument.
*
* Removed init function, since all initialization is now done in
* init_lpc10_encoder_state().
*
* Changed name of function from lpcenc_ to lpc10_encode, simply to make
* all lpc10 functions have more consistent naming with each other.
*
* Revision 1.1 1996/08/19 22:31:44 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 */
/* Uncoded speech parameters */
/* Coded speech parameters */
/* Local state */
/* None */
/* Parameter adjustments */
if (speech) {
--speech;
}
if (bits) {
--bits;
}
/* Function Body */
prepro_(&speech[1], &c__180, st);
analys_(&speech[1], voice, &pitch, &rms, rc, st);
encode_(voice, &pitch, &rms, rc, &ipitv, &irms, irc);
chanwr_(&c__10, &ipitv, &irms, irc, &bits[1], st);
return 0;
} /* lpcenc_ */
