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Version 0.1.2 from FTP
git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@169 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Mark Spencer
151
codecs/lpc10/mload.c
Executable file
151
codecs/lpc10/mload.c
Executable file
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/*
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$Log$
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Revision 1.1 2000/01/05 08:20:39 markster
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Version 0.1.2 from FTP
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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 1.1 1996/08/19 22:31:25 jaf
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* Initial revision
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*
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*/
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#ifdef P_R_O_T_O_T_Y_P_E_S
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extern int mload_(integer *order, integer *awins, integer *awinf, real *speech, real *phi, real *psi);
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#endif
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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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/* ***************************************************************** */
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/* MLOAD Version 48 */
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/* $Log$
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* Revision 1.1 2000/01/05 08:20:39 markster
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* Version 0.1.2 from FTP
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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 1.1 1996/08/19 22:31:25 jaf
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* Initial revision
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* */
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/* Revision 1.5 1996/03/27 23:59:51 jaf */
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/* Added some more accurate comments about which indices of the argument */
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/* array SPEECH are read. I thought that this might be the cause of a */
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/* problem I've been having, but it isn't. */
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/* Revision 1.4 1996/03/26 19:16:53 jaf */
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/* Commented out the code at the end that copied the lower triangular */
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/* half of PHI into the upper triangular half (making the resulting */
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/* matrix symmetric). The upper triangular half was never used by later */
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/* code in subroutine ANALYS. */
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/* Revision 1.3 1996/03/18 21:16:00 jaf */
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/* Just added a few comments about which array indices of the arguments */
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/* are used, and mentioning that this subroutine has no local state. */
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/* Revision 1.2 1996/03/13 16:47:41 jaf */
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/* Comments added explaining that none of the local variables of this */
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/* subroutine need to be saved from one invocation to the next. */
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/* Revision 1.1 1996/02/07 14:48:01 jaf */
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/* Initial revision */
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/* ***************************************************************** */
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/* Load a covariance matrix. */
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/* Input: */
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/* ORDER - Analysis order */
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/* AWINS - Analysis window start */
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/* AWINF - Analysis window finish */
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/* SPEECH(AWINF) - Speech buffer */
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/* Indices MIN(AWINS, AWINF-(ORDER-1)) through */
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/* MAX(AWINF, AWINS+(ORDER-1)) read. */
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/* As long as (AWINF-AWINS) .GE. (ORDER-1), */
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/* this is just indices AWINS through AWINF. */
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/* Output: */
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/* PHI(ORDER,ORDER) - Covariance matrix */
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/* Lower triangular half and diagonal written, and read.*/
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/* Upper triangular half untouched. */
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/* PSI(ORDER) - Prediction vector */
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/* Indices 1 through ORDER written, */
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/* and most are read after that. */
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/* This subroutine has no local state. */
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/* Subroutine */ int mload_(integer *order, integer *awins, integer *awinf,
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real *speech, real *phi, real *psi)
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{
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/* System generated locals */
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integer phi_dim1, phi_offset, i__1, i__2;
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/* Local variables */
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integer c__, i__, r__, start;
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/* Arguments */
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/* Local variables that need not be saved */
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/* Load first column of triangular covariance matrix PHI */
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/* Parameter adjustments */
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--psi;
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phi_dim1 = *order;
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phi_offset = phi_dim1 + 1;
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phi -= phi_offset;
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--speech;
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/* Function Body */
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start = *awins + *order;
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i__1 = *order;
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for (r__ = 1; r__ <= i__1; ++r__) {
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phi[r__ + phi_dim1] = 0.f;
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i__2 = *awinf;
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for (i__ = start; i__ <= i__2; ++i__) {
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phi[r__ + phi_dim1] += speech[i__ - 1] * speech[i__ - r__];
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}
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}
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/* Load last element of vector PSI */
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psi[*order] = 0.f;
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i__1 = *awinf;
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for (i__ = start; i__ <= i__1; ++i__) {
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psi[*order] += speech[i__] * speech[i__ - *order];
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}
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/* End correct to get additional columns of PHI */
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i__1 = *order;
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for (r__ = 2; r__ <= i__1; ++r__) {
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i__2 = r__;
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for (c__ = 2; c__ <= i__2; ++c__) {
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phi[r__ + c__ * phi_dim1] = phi[r__ - 1 + (c__ - 1) * phi_dim1] -
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speech[*awinf + 1 - r__] * speech[*awinf + 1 - c__] +
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speech[start - r__] * speech[start - c__];
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}
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}
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/* End correct to get additional elements of PSI */
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i__1 = *order - 1;
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for (c__ = 1; c__ <= i__1; ++c__) {
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psi[c__] = phi[c__ + 1 + phi_dim1] - speech[start - 1] * speech[start
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- 1 - c__] + speech[*awinf] * speech[*awinf - c__];
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}
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/* Copy lower triangular section into upper (why bother?) */
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/* I'm commenting this out, since the upper triangular half of PHI
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*/
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/* is never used by later code, unless a sufficiently high level of
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*/
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/* tracing is turned on. */
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/* DO R = 1,ORDER */
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/* DO C = 1,R-1 */
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/* PHI(C,R) = PHI(R,C) */
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/* END DO */
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/* END DO */
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return 0;
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} /* mload_ */
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