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Diffstat (limited to 'codecs/lpc10/invert.c')
| -rw-r--r-- | codecs/lpc10/invert.c | 193 |
1 files changed, 0 insertions, 193 deletions
diff --git a/codecs/lpc10/invert.c b/codecs/lpc10/invert.c deleted file mode 100644 index 912117f9c..000000000 --- a/codecs/lpc10/invert.c +++ /dev/null @@ -1,193 +0,0 @@ -/* - -$Log$ -Revision 1.15 2004/06/26 03:50:14 markster -Merge source cleanups (bug #1911) - -Revision 1.14 2003/02/12 13:59:15 matteo -mer feb 12 14:56:57 CET 2003 - -Revision 1.1.1.1 2003/02/12 13:59:15 matteo -mer feb 12 14:56:57 CET 2003 - -Revision 1.2 2000/01/05 08:20:39 markster -Some OSS fixes and a few lpc changes to make it actually work - - * Revision 1.1 1996/08/19 22:32:00 jaf - * Initial revision - * - -*/ - -/* -- translated by f2c (version 19951025). - You must link the resulting object file with the libraries: - -lf2c -lm (in that order) -*/ - -#include "f2c.h" - -#ifdef P_R_O_T_O_T_Y_P_E_S -extern int invert_(integer *order, real *phi, real *psi, real *rc); -#endif - -/* **************************************************************** */ - -/* INVERT Version 45G */ - -/* $Log$ - * Revision 1.15 2004/06/26 03:50:14 markster - * Merge source cleanups (bug #1911) - * - * Revision 1.14 2003/02/12 13:59:15 matteo - * mer feb 12 14:56:57 CET 2003 - * - * Revision 1.1.1.1 2003/02/12 13:59:15 matteo - * mer feb 12 14:56:57 CET 2003 - * - * Revision 1.2 2000/01/05 08:20:39 markster - * Some OSS fixes and a few lpc changes to make it actually work - * - * Revision 1.1 1996/08/19 22:32:00 jaf - * Initial revision - * */ -/* Revision 1.3 1996/03/18 20:52:47 jaf */ -/* Just added a few comments about which array indices of the arguments */ -/* are used, and mentioning that this subroutine has no local state. */ - -/* Revision 1.2 1996/03/13 16:51:32 jaf */ -/* Comments added explaining that none of the local variables of this */ -/* subroutine need to be saved from one invocation to the next. */ - -/* Eliminated a comment from the original, describing a local array X */ -/* that appeared nowhere in the code. */ - -/* Revision 1.1 1996/02/07 14:47:20 jaf */ -/* Initial revision */ - - -/* **************************************************************** */ - -/* Invert a covariance matrix using Choleski decomposition method. */ - -/* Input: */ -/* ORDER - Analysis order */ -/* PHI(ORDER,ORDER) - Covariance matrix */ -/* Indices (I,J) read, where ORDER .GE. I .GE. J .GE. 1.*/ -/* All other indices untouched. */ -/* PSI(ORDER) - Column vector to be predicted */ -/* Indices 1 through ORDER read. */ -/* Output: */ -/* RC(ORDER) - Pseudo reflection coefficients */ -/* Indices 1 through ORDER written, and then possibly read. -*/ -/* Internal: */ -/* V(ORDER,ORDER) - Temporary matrix */ -/* Same indices written as read from PHI. */ -/* Many indices may be read and written again after */ -/* initially being copied from PHI, but all indices */ -/* are written before being read. */ - -/* NOTE: Temporary matrix V is not needed and may be replaced */ -/* by PHI if the original PHI values do not need to be preserved. */ - -/* Subroutine */ int invert_(integer *order, real *phi, real *psi, real *rc) -{ - /* System generated locals */ - integer phi_dim1, phi_offset, i__1, i__2, i__3; - real r__1, r__2; - - /* Local variables */ - real save; - integer i__, j, k; - real v[100] /* was [10][10] */; - -/* Arguments */ -/* $Log$ - * Revision 1.15 2004/06/26 03:50:14 markster - * Merge source cleanups (bug #1911) - * - * Revision 1.14 2003/02/12 13:59:15 matteo - * mer feb 12 14:56:57 CET 2003 - * - * Revision 1.1.1.1 2003/02/12 13:59:15 matteo - * mer feb 12 14:56:57 CET 2003 - * - * Revision 1.2 2000/01/05 08:20:39 markster - * Some OSS fixes and a few lpc changes to make it actually work - * - * Revision 1.1 1996/08/19 22:32:00 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 */ -/* Parameters/constants */ -/* Local variables that need not be saved */ -/* Decompose PHI into V * D * V' where V is a triangular matrix whose */ -/* main diagonal elements are all 1, V' is the transpose of V, and */ -/* D is a vector. Here D(n) is stored in location V(n,n). */ - /* Parameter adjustments */ - --rc; - --psi; - phi_dim1 = *order; - phi_offset = phi_dim1 + 1; - phi -= phi_offset; - - /* Function Body */ - i__1 = *order; - for (j = 1; j <= i__1; ++j) { - i__2 = *order; - for (i__ = j; i__ <= i__2; ++i__) { - v[i__ + j * 10 - 11] = phi[i__ + j * phi_dim1]; - } - i__2 = j - 1; - for (k = 1; k <= i__2; ++k) { - save = v[j + k * 10 - 11] * v[k + k * 10 - 11]; - i__3 = *order; - for (i__ = j; i__ <= i__3; ++i__) { - v[i__ + j * 10 - 11] -= v[i__ + k * 10 - 11] * save; - } - } -/* Compute intermediate results, which are similar to RC's */ - if ((r__1 = v[j + j * 10 - 11], abs(r__1)) < 1e-10f) { - goto L100; - } - rc[j] = psi[j]; - i__2 = j - 1; - for (k = 1; k <= i__2; ++k) { - rc[j] -= rc[k] * v[j + k * 10 - 11]; - } - v[j + j * 10 - 11] = 1.f / v[j + j * 10 - 11]; - rc[j] *= v[j + j * 10 - 11]; -/* Computing MAX */ -/* Computing MIN */ - r__2 = rc[j]; - r__1 = min(r__2,.999f); - rc[j] = max(r__1,-.999f); - } - return 0; -/* Zero out higher order RC's if algorithm terminated early */ -L100: - i__1 = *order; - for (i__ = j; i__ <= i__1; ++i__) { - rc[i__] = 0.f; - } -/* Back substitute for PC's (if needed) */ -/* 110 DO J = ORDER,1,-1 */ -/* PC(J) = RC(J) */ -/* DO I = 1,J-1 */ -/* PC(J) = PC(J) - PC(I)*V(J,I) */ -/* END DO */ -/* END DO */ - return 0; -} /* invert_ */ - |