ref: 021c7886e4ecfe58022848aa3f4877e1986e3089
dir: /lpc10/lpcini.c/
/*
* Revision 1.2 1996/08/20 20:35:41 jaf
* Added functions for allocating and initializing lpc10_encoder_state
* and lpc10_decoder_state structures.
*
* Revision 1.1 1996/08/19 22:31:40 jaf
* Initial revision
*
*/
/* -- translated by f2c (version 19951025).
You must link the resulting object file with the libraries:
-lf2c -lm (in that order)
*/
#include <stdlib.h>
#include "f2c.h"
extern int lpcini_(void);
/* Common Block Declarations */
struct {
integer order, lframe;
logical corrp;
} contrl_;
#define contrl_1 contrl_
/* ***************************************************************** */
/*
* Revision 1.2 1996/08/20 20:35:41 jaf
* Added functions for allocating and initializing lpc10_encoder_state
* and lpc10_decoder_state structures.
*
* Revision 1.1 1996/08/19 22:31:40 jaf
* Initial revision
* */
/* Revision 1.1 1996/03/28 00:04:05 jaf */
/* Initial revision */
/* ***************************************************************** */
/* Initialize COMMON block variables used by LPC-10 encoder and decoder, */
/* and call initialization routines for both of them. */
/* Subroutine */ int lpcini_(void)
{
/* 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 */
contrl_1.order = 10;
contrl_1.lframe = 180;
contrl_1.corrp = TRUE_;
return 0;
} /* lpcini_ */
/* Allocate memory for, and initialize, the state that needs to be
kept from encoding one frame to the next for a single
LPC-10-compressed audio stream. Return 0 if malloc fails,
otherwise return pointer to new structure. */
struct lpc10_encoder_state *
create_lpc10_encoder_state(void)
{
struct lpc10_encoder_state *st;
st = (struct lpc10_encoder_state *)
malloc((unsigned) sizeof (struct lpc10_encoder_state));
if (st != 0) {
init_lpc10_encoder_state(st);
}
return (st);
}
void init_lpc10_encoder_state(struct lpc10_encoder_state *st)
{
int i;
lpcini_();
/* State used only by function hp100 */
st->z11 = 0.0f;
st->z21 = 0.0f;
st->z12 = 0.0f;
st->z22 = 0.0f;
/* State used by function analys */
for (i = 0; i < 540; i++) {
st->inbuf[i] = 0.0f;
st->pebuf[i] = 0.0f;
}
for (i = 0; i < 696; i++) {
st->lpbuf[i] = 0.0f;
}
for (i = 0; i < 312; i++) {
st->ivbuf[i] = 0.0f;
}
st->bias = 0.0f;
/* integer osbuf[10]; no initial value necessary */
st->osptr = 1;
for (i = 0; i < 3; i++) {
st->obound[i] = 0;
}
st->vwin[4] = 307;
st->vwin[5] = 462;
st->awin[4] = 307;
st->awin[5] = 462;
for (i = 0; i < 8; i++) {
st->voibuf[i] = 0;
}
for (i = 0; i < 3; i++) {
st->rmsbuf[i] = 0.0f;
}
for (i = 0; i < 30; i++) {
st->rcbuf[i] = 0.0f;
}
st->zpre = 0.0f;
/* State used by function onset */
st->n = 0.0f;
st->d__ = 1.0f;
/* real fpc; no initial value necessary */
for (i = 0; i < 16; i++) {
st->l2buf[i] = 0.0f;
}
st->l2sum1 = 0.0f;
st->l2ptr1 = 1;
st->l2ptr2 = 9;
/* integer lasti; no initial value necessary */
st->hyst = FALSE_;
/* State used by function voicin */
st->dither = 20.0f;
st->maxmin = 0.0f;
for (i = 0; i < 6; i++) {
st->voice[i] = 0.0f;
}
st->lbve = 3000;
st->fbve = 3000;
st->fbue = 187;
st->ofbue = 187;
st->sfbue = 187;
st->lbue = 93;
st->olbue = 93;
st->slbue = 93;
st->snr = (real) (st->fbve / st->fbue << 6);
/* State used by function dyptrk */
for (i = 0; i < 60; i++) {
st->s[i] = 0.0f;
}
for (i = 0; i < 120; i++) {
st->p[i] = 0;
}
st->ipoint = 0;
st->alphax = 0.0f;
/* State used by function chanwr */
st->isync = 0;
}
/* Allocate memory for, and initialize, the state that needs to be
kept from decoding one frame to the next for a single
LPC-10-compressed audio stream. Return 0 if malloc fails,
otherwise return pointer to new structure. */
struct lpc10_decoder_state *
create_lpc10_decoder_state(void)
{
struct lpc10_decoder_state *st;
st = (struct lpc10_decoder_state *)
malloc((unsigned) sizeof (struct lpc10_decoder_state));
if (st != 0) {
init_lpc10_decoder_state(st);
}
return (st);
}
void init_lpc10_decoder_state(struct lpc10_decoder_state *st)
{
int i;
lpcini_();
/* State used by function decode */
st->iptold = 60;
st->first = TRUE_;
st->ivp2h = 0;
st->iovoic = 0;
st->iavgp = 60;
st->erate = 0;
for (i = 0; i < 30; i++) {
st->drc[i] = 0;
}
for (i = 0; i < 3; i++) {
st->dpit[i] = 0;
st->drms[i] = 0;
}
/* State used by function synths */
for (i = 0; i < 360; i++) {
st->buf[i] = 0.0f;
}
st->buflen = 180;
/* State used by function pitsyn */
/* ivoico; no initial value necessary as long as first_pitsyn is initially TRUE_ */
/* ipito; no initial value necessary as long as first_pitsyn is initially TRUE_ */
st->rmso = 1.0f;
/* rco[10]; no initial value necessary as long as first_pitsyn is initially TRUE_ */
/* integer jsamp; no initial value necessary as long as first_pitsyn is initially TRUE_ */
st->first_pitsyn = TRUE_;
/* State used by function bsynz */
st->ipo = 0;
for (i = 0; i < 166; i++) {
st->exc[i] = 0.0f;
st->exc2[i] = 0.0f;
}
st->lpi1 = 0.0f;
st->lpi2 = 0.0f;
st->lpi3 = 0.0f;
st->hpi1 = 0.0f;
st->hpi2 = 0.0f;
st->hpi3 = 0.0f;
st->rmso_bsynz = 0.0f;
/* State used by function random */
st->j = 2;
st->k = 5;
st->y[0] = (shortint) -21161;
st->y[1] = (shortint) -8478;
st->y[2] = (shortint) 30892;
st->y[3] = (shortint) -10216;
st->y[4] = (shortint) 16950;
/* State used by function deemp */
st->dei1 = 0.0f;
st->dei2 = 0.0f;
st->deo1 = 0.0f;
st->deo2 = 0.0f;
st->deo3 = 0.0f;
}