text: /* ----------------------------------------------------------------- */
  /*             The Speech Signal Processing Toolkit (SPTK)           */
  /*             developed by SPTK Working Group                       */
  /*             http://sp-tk.sourceforge.net/                         */
  /* ----------------------------------------------------------------- */
  /*                                                                   */
  /*  Copyright (c) 1984-2007  Tokyo Institute of Technology           */
  /*                           Interdisciplinary Graduate School of    */
  /*                           Science and Engineering                 */
  /*                                                                   */
  /*                1996-2017  Nagoya Institute of Technology          */
  /*                           Department of Computer Science          */
  /*                                                                   */
  /* All rights reserved.                                              */
  /*                                                                   */
  /* Redistribution and use in source and binary forms, with or        */
  /* without modification, are permitted provided that the following   */
  /* conditions are met:                                               */
  /*                                                                   */
  /* - Redistributions of source code must retain the above copyright  */
  /*   notice, this list of conditions and the following disclaimer.   */
  /* - Redistributions in binary form must reproduce the above         */
  /*   copyright notice, this list of conditions and the following     */
  /*   disclaimer in the documentation and/or other materials provided */
  /*   with the distribution.                                          */
  /* - Neither the name of the SPTK working group nor the names of its */
  /*   contributors may be used to endorse or promote products derived */
  /*   from this software without specific prior written permission.   */
  /*                                                                   */
  /* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND            */
  /* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,       */
  /* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF          */
  /* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE          */
  /* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS */
  /* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,          */
  /* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED   */
  /* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,     */
  /* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON */
  /* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,   */
  /* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY    */
  /* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE           */
  /* POSSIBILITY OF SUCH DAMAGE.                                       */
  /* ----------------------------------------------------------------- */
  
  /************************************************************************
  *                                                                       *
  *    MGLSA Digital Filter for Speech Synthesis                          *
  *                                                                       *
  *                                        1996.3  K.Koishida             *
  *                                                                       *
  *       usage:                                                          *
  *               mglsadf [ options ] [ infile ] > stdout                 *
  *       options:                                                        *
  *               -m m     :  order of mel-generalized cepstrum  [25]     *
  *               -a a     :  alpha                              [0.35]   *
  *               -c c     :  gamma = -1 / (int) c               [1]      *
  *               -p p     :  frame period                       [100]    *
  *               -i i     :  interpolation period               [1]      *
  *               -t       :  transpose filter                   [FALSE]  *
  *               -v       :  inverse filter                     [FALSE]  *
  *               -k       :  filtering without gain             [FALSE]  *
  *               -P P     :  order of Pade approximation        [4]      *
  *       infile:                                                         *
  *               mel-generalized cepstral coefficients                   *
  *                      , c~(0), c~(1), ..., c~(M),                      *
  *       excitation sequence                                             *
  *                      , x(0), x(1), ...,                               *
  *       stdout:                                                         *
  *               filtered sequence                                       *
  *                      , y(0), y(1), ...,                               *
  *       notice:                                                         *
  *               if c==0, MLSA filter is used, P should be 4, 5, 6, or 7 *
  *       require:                                                        *
  *               mglsadf(), mlsadf(), imglsadf(), mglsadft(), imglsadft()*
  *                                                                       *  
  ************************************************************************/
  
  static char *rcs_id =
      "$Id$";
  
  
  /*  Standard C Libraries  */
  #include <stdio.h>
  #include <stdlib.h>
  
  #ifdef HAVE_STRING_H
  #include <string.h>
  #else
  #include <strings.h>
  #ifndef HAVE_STRRCHR
  #define strrchr rindex
  #endif
  #endif
  
  #include <math.h>
  
  #if defined(WIN32)
  #include "SPTK.h"
  #else
  #include <SPTK.h>
  #endif
  
  /*  Default Values  */
  #define ORDER     25
  #define ALPHA     0.35
  #define STAGE     1
  #define FPERIOD   100
  #define IPERIOD   1
  #define TRANSPOSE FA
  #define INVERSE   FA
  #define NGAIN     FA
  #define PADEORDER 4
  
  char *BOOL[] = { "FALSE", "TRUE" };
  
  /*  Command Name  */
  char *cmnd;
  
  
  void usage(int status)
  {
     fprintf(stderr, "\n");
     fprintf(stderr, " %s - MGLSA digital filter for speech synthesis\n", cmnd);
     fprintf(stderr, "\n");
     fprintf(stderr, "  usage:\n");
     fprintf(stderr, "       %s [ options ] mgcfile [ infile ] > stdout\n", cmnd);
     fprintf(stderr, "  options:\n");
     fprintf(stderr, "       -m m  : order of mel-generalized cepstrum [%d]\n",
             ORDER);
     fprintf(stderr, "       -a a  : alpha                             [%g]\n",
             ALPHA);
     fprintf(stderr, "       -c c  : gamma = -1 / (int) c              [%d]\n",
             STAGE);
     fprintf(stderr, "       -p p  : frame period                      [%d]\n",
             FPERIOD);
     fprintf(stderr, "       -i i  : interpolation period              [%d]\n",
             IPERIOD);
     fprintf(stderr, "       -t    : transpose filter                  [%s]\n",
             BOOL[TRANSPOSE]);
     fprintf(stderr, "       -v    : inverse filter                    [%s]\n",
             BOOL[INVERSE]);
     fprintf(stderr, "       -k    : filtering without gain            [%s]\n",
             BOOL[NGAIN]);
     fprintf(stderr, "       -P P  : order of Pade approximation       [%d]\n",
             PADEORDER);
     fprintf(stderr, "       -h    : print this message\n");
     fprintf(stderr, "  infile:\n");
     fprintf(stderr, "       filter input (%s)                      [stdin]\n",
             FORMAT);
     fprintf(stderr, "  stdout:\n");
     fprintf(stderr, "       filter output (%s)\n", FORMAT);
     fprintf(stderr, "  mgcfile:\n");
     fprintf(stderr, "       mel-generalized cepstrum (%s)\n", FORMAT);
     fprintf(stderr, "  notice:\n");
     fprintf(stderr, "       if c==0, MLSA filter is used, P should be 4, 5, 6, or 7\n");
  #ifdef PACKAGE_VERSION
     fprintf(stderr, "\n");
     fprintf(stderr, " SPTK: version %s\n", PACKAGE_VERSION);
     fprintf(stderr, " CVS Info: %s", rcs_id);
  #endif
     fprintf(stderr, "\n");
     exit(status);
  }
  
  
  int main(int argc, char **argv)
  {
     int m = ORDER, fprd = FPERIOD, iprd = IPERIOD, stage = STAGE, pd =
         PADEORDER, i, j;
     Boolean transpose = TRANSPOSE, ngain = NGAIN, inverse = INVERSE;
     FILE *fp = stdin, *fpc = NULL;
     double alpha = ALPHA, gamma = -1 / (double) STAGE, x, *c, *inc, *cc, *d;
  
     if ((cmnd = strrchr(argv[0], '/')) == NULL)
        cmnd = argv[0];
     else
        cmnd++;
     while (--argc)
        if (**++argv == '-') {
           switch (*(*argv + 1)) {
           case 'm':
              m = atoi(*++argv);
              --argc;
              break;
           case 'a':
              alpha = atof(*++argv);
              --argc;
              break;
           case 'c':
              stage = atoi(*++argv);
              --argc;
              break;
           case 'p':
              fprd = atoi(*++argv);
              --argc;
              break;
           case 'i':
              iprd = atoi(*++argv);
              --argc;
              break;
           case 't':
              transpose = 1 - transpose;
              break;
           case 'v':
              inverse = 1 - inverse;
              break;
           case 'k':
              ngain = 1 - ngain;
              break;
           case 'P':
              pd = atoi(*++argv);
              --argc;
              break;
           case 'h':
              usage(0);
           default:
              fprintf(stderr, "%s : Invalid option '%c'!\n", cmnd, *(*argv + 1));
              usage(1);
           }
        } else if (fpc == NULL)
           fpc = getfp(*argv, "rb");
        else
           fp = getfp(*argv, "rb");
  
     if (fpc == NULL) {
        fprintf(stderr, "%s : Cannot open cepstrum file!\n", cmnd);
        return (1);
     }
  
     if (inverse) {
        if (stage == 0) {
           fprintf(stderr, "%s : gamma should not equal to 0 in Inverse MGLSA!\n",
                   cmnd);
           usage(1);
        }
     }
  
     if (stage != 0) {            /* MGLSA */
        gamma = -1 / (double) stage;
     } else {                     /* MLSA */
        if ((pd < 4) || (pd > 7)) {
           fprintf(stderr, "%s : Order of Pade approximation should be an integer in the rage of 4 to 7!\n",
                   cmnd);
           return (1);
        }
     }
  
     c = (stage != 0) ? dgetmem(m + m + m + 3 + (m + 1) * stage)  /* MGLSA */
         : dgetmem(3 * (m + 1) + 3 * (pd + 1) + pd * (m + 2));    /* MLSA  */
     cc = c + m + 1;
     inc = cc + m + 1;
     d = inc + m + 1;
  
     if (freadf(c, sizeof(*c), m + 1, fpc) != m + 1)
        return (1);
     mc2b(c, c, m, alpha);
     if (stage != 0) {            /* MGLSA */
        gnorm(c, c, m, gamma);
        c[0] = log(c[0]);
        for (i = 1; i <= m; i++)
           c[i] *= gamma;
     }
  
  
     for (;;) {
        if (freadf(cc, sizeof(*cc), m + 1, fpc) != m + 1)
           return (0);
        mc2b(cc, cc, m, alpha);
        if (stage != 0) {
           gnorm(cc, cc, m, gamma);
           cc[0] = log(cc[0]);
           for (i = 1; i <= m; i++)
              cc[i] *= gamma;
        }
  
        for (i = 0; i <= m; i++)
           inc[i] = (cc[i] - c[i]) * iprd / fprd;
  
        for (j = fprd, i = (iprd + 1) / 2; j--;) {
           if (freadf(&x, sizeof(x), 1, fp) != 1)
              return (0);
  
  
           if (inverse) {         /* IMGLSA */
              if (!ngain)
                 x /= exp(c[0]);
              if (transpose)
                 x = imglsadft(x, c, m, alpha, stage, d);
              else
                 x = imglsadf(x, c, m, alpha, stage, d);
           } else {
              if (stage != 0) {   /* MGLSA */
                 if (!ngain)
                    x *= exp(c[0]);
                 if (transpose)
                    x = mglsadft(x, c, m, alpha, stage, d);
                 else
                    x = mglsadf(x, c, m, alpha, stage, d);
              } else {            /* MLSA */
                 if (!ngain)
                    x *= exp(c[0]);
                 x = mlsadf(x, c, m, alpha, pd, d);
              }
           }
  
           fwritef(&x, sizeof(x), 1, stdout);
  
           if (!--i) {
              for (i = 0; i <= m; i++)
                 c[i] += inc[i];
              i = iprd;
           }
        }
  
        movem(cc, c, sizeof(*cc), m + 1);
     }
  
     return (0);
  }
  