codecs/lpc10/mload.c

   1 /*
   2
   3 $Log$
   4 Revision 1.15  2004/06/26 03:50:14  markster
   5 Merge source cleanups (bug #1911)
   6
   7 Revision 1.14  2003/02/12 13:59:15  matteo
   8 mer feb 12 14:56:57 CET 2003
   9
  10 Revision 1.1.1.1  2003/02/12 13:59:15  matteo
  11 mer feb 12 14:56:57 CET 2003
  12
  13 Revision 1.2  2000/01/05 08:20:39  markster
  14 Some OSS fixes and a few lpc changes to make it actually work
  15
  16  * Revision 1.1  1996/08/19  22:31:25  jaf
  17  * Initial revision
  18  *
  19
  20 */
  21
  22 /*  -- translated by f2c (version 19951025).
  23    You must link the resulting object file with the libraries:
  24         -lf2c -lm   (in that order)
  25 */
  26
  27 #include "f2c.h"
  28
  29 #ifdef P_R_O_T_O_T_Y_P_E_S
  30 extern int mload_(integer *order, integer *awins, integer *awinf, real *speech, real *phi, real *psi);
  31 #endif
  32
  33 /* ***************************************************************** */
  34
  35 /*      MLOAD Version 48 */
  36
  37 /* $Log$
  38  * Revision 1.15  2004/06/26 03:50:14  markster
  39  * Merge source cleanups (bug #1911)
  40  *
  41  * Revision 1.14  2003/02/12 13:59:15  matteo
  42  * mer feb 12 14:56:57 CET 2003
  43  *
  44  * Revision 1.1.1.1  2003/02/12 13:59:15  matteo
  45  * mer feb 12 14:56:57 CET 2003
  46  *
  47  * Revision 1.2  2000/01/05 08:20:39  markster
  48  * Some OSS fixes and a few lpc changes to make it actually work
  49  *
  50  * Revision 1.1  1996/08/19  22:31:25  jaf
  51  * Initial revision
  52  * */
  53 /* Revision 1.5  1996/03/27  23:59:51  jaf */
  54 /* Added some more accurate comments about which indices of the argument */
  55 /* array SPEECH are read.  I thought that this might be the cause of a */
  56 /* problem I've been having, but it isn't. */
  57
  58 /* Revision 1.4  1996/03/26  19:16:53  jaf */
  59 /* Commented out the code at the end that copied the lower triangular */
  60 /* half of PHI into the upper triangular half (making the resulting */
  61 /* matrix symmetric).  The upper triangular half was never used by later */
  62 /* code in subroutine ANALYS. */
  63
  64 /* Revision 1.3  1996/03/18  21:16:00  jaf */
  65 /* Just added a few comments about which array indices of the arguments */
  66 /* are used, and mentioning that this subroutine has no local state. */
  67
  68 /* Revision 1.2  1996/03/13  16:47:41  jaf */
  69 /* Comments added explaining that none of the local variables of this */
  70 /* subroutine need to be saved from one invocation to the next. */
  71
  72 /* Revision 1.1  1996/02/07 14:48:01  jaf */
  73 /* Initial revision */
  74
  75
  76 /* ***************************************************************** */
  77
  78 /* Load a covariance matrix. */
  79
  80 /* Input: */
  81 /*  ORDER            - Analysis order */
  82 /*  AWINS            - Analysis window start */
  83 /*  AWINF            - Analysis window finish */
  84 /*  SPEECH(AWINF)    - Speech buffer */
  85 /*                     Indices MIN(AWINS, AWINF-(ORDER-1)) through */
  86 /*                             MAX(AWINF, AWINS+(ORDER-1)) read. */
  87 /*                     As long as (AWINF-AWINS) .GE. (ORDER-1), */
  88 /*                     this is just indices AWINS through AWINF. */
  89 /* Output: */
  90 /*  PHI(ORDER,ORDER) - Covariance matrix */
  91 /*                    Lower triangular half and diagonal written, and read.*/
  92 /*                     Upper triangular half untouched. */
  93 /*  PSI(ORDER)       - Prediction vector */
  94 /*                     Indices 1 through ORDER written, */
  95 /*                     and most are read after that. */
  96
  97 /* This subroutine has no local state. */
  98
  99 /* Subroutine */ int mload_(integer *order, integer *awins, integer *awinf,
 100         real *speech, real *phi, real *psi)
 101 {
 102     /* System generated locals */
 103     integer phi_dim1, phi_offset, i__1, i__2;
 104
 105     /* Local variables */
 106     integer c__, i__, r__, start;
 107
 108 /*       Arguments */
 109 /*       Local variables that need not be saved */
 110 /*   Load first column of triangular covariance matrix PHI */
 111     /* Parameter adjustments */
 112     --psi;
 113     phi_dim1 = *order;
 114     phi_offset = phi_dim1 + 1;
 115     phi -= phi_offset;
 116     --speech;
 117
 118     /* Function Body */
 119     start = *awins + *order;
 120     i__1 = *order;
 121     for (r__ = 1; r__ <= i__1; ++r__) {
 122         phi[r__ + phi_dim1] = 0.f;
 123         i__2 = *awinf;
 124         for (i__ = start; i__ <= i__2; ++i__) {
 125             phi[r__ + phi_dim1] += speech[i__ - 1] * speech[i__ - r__];
 126         }
 127     }
 128 /*   Load last element of vector PSI */
 129     psi[*order] = 0.f;
 130     i__1 = *awinf;
 131     for (i__ = start; i__ <= i__1; ++i__) {
 132         psi[*order] += speech[i__] * speech[i__ - *order];
 133     }
 134 /*   End correct to get additional columns of PHI */
 135     i__1 = *order;
 136     for (r__ = 2; r__ <= i__1; ++r__) {
 137         i__2 = r__;
 138         for (c__ = 2; c__ <= i__2; ++c__) {
 139             phi[r__ + c__ * phi_dim1] = phi[r__ - 1 + (c__ - 1) * phi_dim1] -
 140                     speech[*awinf + 1 - r__] * speech[*awinf + 1 - c__] +
 141                     speech[start - r__] * speech[start - c__];
 142         }
 143     }
 144 /*   End correct to get additional elements of PSI */
 145     i__1 = *order - 1;
 146     for (c__ = 1; c__ <= i__1; ++c__) {
 147         psi[c__] = phi[c__ + 1 + phi_dim1] - speech[start - 1] * speech[start
 148                 - 1 - c__] + speech[*awinf] * speech[*awinf - c__];
 149     }
 150 /*   Copy lower triangular section into upper (why bother?) */
 151 /*       I'm commenting this out, since the upper triangular half of PHI
 152 */
 153 /*       is never used by later code, unless a sufficiently high level of
 154 */
 155 /*       tracing is turned on. */
 156 /*      DO R = 1,ORDER */
 157 /*         DO C = 1,R-1 */
 158 /*            PHI(C,R) = PHI(R,C) */
 159 /*         END DO */
 160 /*      END DO */
 161     return 0;
 162 } /* mload_ */
 163