diff options
Diffstat (limited to '1.4.23-rc4/codecs/lpc10/vparms.c')
| -rw-r--r-- | 1.4.23-rc4/codecs/lpc10/vparms.c | 255 |
1 files changed, 0 insertions, 255 deletions
diff --git a/1.4.23-rc4/codecs/lpc10/vparms.c b/1.4.23-rc4/codecs/lpc10/vparms.c deleted file mode 100644 index c75b1b17d..000000000 --- a/1.4.23-rc4/codecs/lpc10/vparms.c +++ /dev/null @@ -1,255 +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 08:20:40 markster -Some OSS fixes and a few lpc changes to make it actually work - - * Revision 1.1 1996/08/19 22:30:04 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 vparms_(integer *vwin, real *inbuf, real *lpbuf, integer *buflim, integer *half, real *dither, integer *mintau, integer *zc, integer *lbe, integer *fbe, real *qs, real *rc1, real *ar_b__, real *ar_f__); -#endif - -/* Table of constant values */ - -static real c_b2 = 1.f; - -/* ********************************************************************* */ - -/* VPARMS Version 50 */ - -/* $Log$ - * 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 08:20:40 markster - * Some OSS fixes and a few lpc changes to make it actually work - * - * Revision 1.1 1996/08/19 22:30:04 jaf - * Initial revision - * */ -/* Revision 1.6 1996/03/29 18:01:16 jaf */ -/* Added some more comments about the range of INBUF and LPBUF that can */ -/* be read. Note that it is possible for index VWIN(2)+1 to be read from */ -/* INBUF, which might be outside of its defined range, although that will */ -/* require more careful checking. */ - -/* Revision 1.5 1996/03/19 00:02:02 jaf */ -/* I just noticed that the argument DITHER is modified inside of this */ -/* subroutine. Comments were added explaining the possible final values. */ - -/* Revision 1.4 1996/03/18 22:22:59 jaf */ -/* Finishing the job I said I did with the last check-in comments. */ - -/* Revision 1.3 1996/03/18 22:22:17 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 15:02:58 jaf */ -/* Comments added explaining that none of the local variables of this */ -/* subroutine need to be saved from one invocation to the next. */ - -/* Revision 1.1 1996/02/07 14:50:42 jaf */ -/* Initial revision */ - - -/* ********************************************************************* */ - -/* Calculate voicing parameters: */ - -/* Input: */ -/* VWIN - Voicing window limits */ -/* Indices 1 through 2 read. */ -/* INBUF - Input speech buffer */ -/* Indices START-1 through STOP read, */ -/* where START and STOP are defined in the code (only written once). -*/ -/* Note that STOP can be as large as VWIN(2)+1 ! */ -/* LPBUF - Low pass filtered speech */ -/* Indices START-MINTAU through STOP+MINTAU read, */ -/* where START and STOP are defined in the code (only written once). -*/ -/* BUFLIM - Array bounds for INBUF and LPBUF */ -/* Indices 1 through 4 read. */ -/* HALF - Half frame (1 or 2) */ -/* MINTAU - Lag corresponding to minimum AMDF value (pitch estimate) */ -/* Input/Output: */ -/* DITHER - Zero crossing threshold */ -/* The resulting value might be the negation of the input */ -/* value. It might always be the same as the input value, */ -/* if the DO loop below always executes an even number of times. */ -/* Output: (all of them are written on every call) */ -/* ZC - Zero crossing rate */ -/* LBE - Low band energy (sum of magnitudes - SM) */ -/* FBE - Full band energy (SM) */ -/* QS - Ratio of 6 dB/oct preemphasized energy to full band energy */ -/* RC1 - First reflection coefficient */ -/* AR_B - Product of the causal forward and reverse pitch */ -/* prediction gains */ -/* AR_F - Product of the noncausal forward and reverse pitch */ -/* prediction gains */ -/* Internal: */ -/* OLDSGN - Previous sign of dithered signal */ -/* VLEN - Length of voicing window */ -/* START - Lower address of current half of voicing window */ -/* STOP - Upper address of current half of voicing window */ -/* E_0 - Energy of LPF speech (sum of squares - SS) */ -/* E_B - Energy of LPF speech backward one pitch period (SS) */ -/* E_F - Energy of LPF speech forward one pitch period (SS) */ -/* R_B - Autocovariance of LPF speech backward one pitch period */ -/* R_F - Autocovariance of LPF speech forward one pitch period */ -/* LP_RMS - Energy of LPF speech (sum of magnitudes - SM) */ -/* AP_RMS - Energy of all-pass speech (SM) */ -/* E_PRE - Energy of 6dB preemphasized speech (SM) */ -/* E0AP - Energy of all-pass speech (SS) */ - -/* This subroutine has no local state. */ - -/* Subroutine */ int vparms_(integer *vwin, real *inbuf, real *lpbuf, integer - *buflim, integer *half, real *dither, integer *mintau, integer *zc, - integer *lbe, integer *fbe, real *qs, real *rc1, real *ar_b__, real * - ar_f__) -{ - /* System generated locals */ - integer inbuf_offset, lpbuf_offset, i__1; - real r__1, r__2; - - /* Builtin functions */ - double r_sign(real *, real *); - integer i_nint(real *); - - /* Local variables */ - integer vlen, stop, i__; - real e_pre__; - integer start; - real ap_rms__, e_0__, oldsgn, lp_rms__, e_b__, e_f__, r_b__, r_f__, e0ap; - -/* Arguments */ -/* Local variables that need not be saved */ -/* Calculate zero crossings (ZC) and several energy and correlation */ -/* measures on low band and full band speech. Each measure is taken */ -/* over either the first or the second half of the voicing window, */ -/* depending on the variable HALF. */ - /* Parameter adjustments */ - --vwin; - --buflim; - lpbuf_offset = buflim[3]; - lpbuf -= lpbuf_offset; - inbuf_offset = buflim[1]; - inbuf -= inbuf_offset; - - /* Function Body */ - lp_rms__ = 0.f; - ap_rms__ = 0.f; - e_pre__ = 0.f; - e0ap = 0.f; - *rc1 = 0.f; - e_0__ = 0.f; - e_b__ = 0.f; - e_f__ = 0.f; - r_f__ = 0.f; - r_b__ = 0.f; - *zc = 0; - vlen = vwin[2] - vwin[1] + 1; - start = vwin[1] + (*half - 1) * vlen / 2 + 1; - stop = start + vlen / 2 - 1; - -/* I'll use the symbol HVL in the table below to represent the value */ -/* VLEN/2. Note that if VLEN is odd, then HVL should be rounded down, */ -/* i.e., HVL = (VLEN-1)/2. */ - -/* HALF START STOP */ - -/* 1 VWIN(1)+1 VWIN(1)+HVL */ -/* 2 VWIN(1)+HVL+1 VWIN(1)+2*HVL */ - -/* Note that if VLEN is even and HALF is 2, then STOP will be */ -/* VWIN(1)+VLEN = VWIN(2)+1. That could be bad, if that index of INBUF */ -/* is undefined. */ - - r__1 = inbuf[start - 1] - *dither; - oldsgn = (real)r_sign(&c_b2, &r__1); - i__1 = stop; - for (i__ = start; i__ <= i__1; ++i__) { - lp_rms__ += (r__1 = lpbuf[i__], abs(r__1)); - ap_rms__ += (r__1 = inbuf[i__], abs(r__1)); - e_pre__ += (r__1 = inbuf[i__] - inbuf[i__ - 1], abs(r__1)); -/* Computing 2nd power */ - r__1 = inbuf[i__]; - e0ap += r__1 * r__1; - *rc1 += inbuf[i__] * inbuf[i__ - 1]; -/* Computing 2nd power */ - r__1 = lpbuf[i__]; - e_0__ += r__1 * r__1; -/* Computing 2nd power */ - r__1 = lpbuf[i__ - *mintau]; - e_b__ += r__1 * r__1; -/* Computing 2nd power */ - r__1 = lpbuf[i__ + *mintau]; - e_f__ += r__1 * r__1; - r_f__ += lpbuf[i__] * lpbuf[i__ + *mintau]; - r_b__ += lpbuf[i__] * lpbuf[i__ - *mintau]; - r__1 = inbuf[i__] + *dither; - if (r_sign(&c_b2, &r__1) != oldsgn) { - ++(*zc); - oldsgn = -oldsgn; - } - *dither = -(*dither); - } -/* Normalized short-term autocovariance coefficient at unit sample delay - */ - *rc1 /= max(e0ap,1.f); -/* Ratio of the energy of the first difference signal (6 dB/oct preemphas -is)*/ -/* to the energy of the full band signal */ -/* Computing MAX */ - r__1 = ap_rms__ * 2.f; - *qs = e_pre__ / max(r__1,1.f); -/* aR_b is the product of the forward and reverse prediction gains, */ -/* looking backward in time (the causal case). */ - *ar_b__ = r_b__ / max(e_b__,1.f) * (r_b__ / max(e_0__,1.f)); -/* aR_f is the same as aR_b, but looking forward in time (non causal case -).*/ - *ar_f__ = r_f__ / max(e_f__,1.f) * (r_f__ / max(e_0__,1.f)); -/* Normalize ZC, LBE, and FBE to old fixed window length of 180. */ -/* (The fraction 90/VLEN has a range of .58 to 1) */ - r__2 = (real) (*zc << 1); - r__1 = r__2 * (90.f / vlen); - *zc = i_nint(&r__1); -/* Computing MIN */ - r__1 = lp_rms__ / 4 * (90.f / vlen); - i__1 = i_nint(&r__1); - *lbe = min(i__1,32767); -/* Computing MIN */ - r__1 = ap_rms__ / 4 * (90.f / vlen); - i__1 = i_nint(&r__1); - *fbe = min(i__1,32767); - return 0; -} /* vparms_ */ - |