sfbank.c

/******************************************************************************/
/*                                                                            */
/*                                 sfbank.c                                   */
/*                                                                            */
/*                               SPro Sources                                 */
/*                                                                            */
/* Guig                                                             Apr. 1997 */
/* -------------------------------------------------------------------------- */
/*
   $Author: guig $
   $Date: 2010-11-09 16:57:22 +0100 (Tue, 09 Nov 2010) $
   $Revision: 151 $
*/
/*  
   Copyright (C) 1997-2010 Guillaume Gravier (guig@irisa.fr)

   Permission is hereby granted, free of charge, to any person
   obtaining a copy of this software and associated documentation
   files (the "Software"), to deal in the Software without
   restriction, including without limitation the rights to use, copy,
   modify, merge, publish, distribute, sublicense, and/or sell copies
   of the Software, and to permit persons to whom the Software is
   furnished to do so, subject to the following conditions:

   The above copyright notice and this permission notice shall be
   included in all copies or substantial portions of the Software.

   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
   NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
   BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
   ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
   CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
   SOFTWARE.
*/

/*
 * Convert speech input file to filter bank output feature file.
 */

#define _sfbank_c_

#include <spro.h>
#include <gggetopt.h>

static char *cvsid = "$Id: sfbank.c 151 2010-11-09 15:57:22Z guig $";

/* ----------------------------------------------- */
/* ----- global variables set by read_args() ----- */
/* ----------------------------------------------- */
int format = SPRO_SIG_PCM16_FORMAT; /* signal file format                     */
float Fs = 8000.0;                /* input signal sample rate                 */
int channel = 1;                  /* channel to process                       */
int swap = 0;                     /* change input sample byte order           */
size_t ibs = 10000000;            /* input buffer size (in bytes)             */
size_t obs = 10000000;            /* output buffer size (in bytes)            */
int with_header = 0;              /* output variable length header            */

float emphco = 0.95;              /* pre-emphasis coefficient                 */
float fm_l = 20.0;                /* frame length in ms                       */
float fm_d = 10.0;                /* frame shift in ms                        */
int win = SPRO_HAMMING_WINDOW;    /* weighting window                         */

unsigned short nfilters = 24;     /* number of filters                        */
float alpha = 0.0;                /* frequency deformation parameter          */
int usemel = 0;                   /* use Mel scale?                           */
float f_min = 0.0;                /* lower frequency bound (in Hz)            */
float f_max = 0.0;                /* higher frequency bound (in Hz)           */
int fftnpts = 512;                /* FFT length                               */

int flag = 0;                     /* output feature stream description        */

int trace = 0;                    /* trace level                              */

/* ---------------------------- */
/* ----- void usage(void) ----- */
/* ---------------------------- */
void usage(void)
{
  fprintf(stdout, "Usage:\n"); 
  fprintf(stdout, "    sfbank [options] ifile ofile\n");
  fprintf(stdout, "\n");
  fprintf(stdout, "Synopsis:\n");
  fprintf(stdout, "    Filter bank analysis of the input signal.\n");
  fprintf(stdout, "\n");
  fprintf(stdout, "Options:\n");
  fprintf(stdout, "  -F, --format=s            input signal file format (pcm16)\n");
  fprintf(stdout, "  -f, --sample-rate=n       signal sample rate for pcm16 input (%.1f Hz)\n", Fs);
  fprintf(stdout, "  -x, --channel=n           channel number (%d)\n", channel);
  fprintf(stdout, "  -B, --swap                swap sample byte order (don't)\n");
  fprintf(stdout, "  -I, --input-bufsize=n     input buffer size in kbytes (10000)\n");
  fprintf(stdout, "  -O, --output-bufsize=n    output buffer size in kbytes (10000)\n");
  fprintf(stdout, "  -H, --header              output variable length header (don't)\n");  
  fprintf(stdout, "\n");
  fprintf(stdout, "  -k, --pre-emphasis=n      pre-emphasis coefficient (%.2f)\n", emphco);
  fprintf(stdout, "  -l, --length=n            frame length in ms (%.1f ms)\n", fm_l);
  fprintf(stdout, "  -d, --shift=n             frame shift in ms (%.1f ms)\n", fm_d);
  fprintf(stdout, "  -w, --window=s            weighting window (HAMMING)\n");
  fprintf(stdout, "\n");
  fprintf(stdout, "  -n, --num-filter=n        number of filters in the filter-bank (%u)\n", nfilters);
  fprintf(stdout, "  -a, --alpha=n             frequency warping parameter (%.1f)\n", alpha);
  fprintf(stdout, "  -m, --mel                 use MEL frequency scale (off)\n");
  fprintf(stdout, "  -i, --freq-min=n          lower frequency bound (0 Hz)\n");
  fprintf(stdout, "  -u, --freq-max=n          higher frequency bound (Fs/2)\n");
  fprintf(stdout, "  -b, --fft-length=n        FFT length (%d)\n", fftnpts);
  fprintf(stdout, "\n");
  fprintf(stdout, "  -D, --delta               add first order derivatives (no)\n");
  fprintf(stdout, "  -A, --acceleration        add second order derivatives (no)\n");
  fprintf(stdout, "\n");
  fprintf(stdout, "  -v, --verbose             verbose mode\n");
  fprintf(stdout, "  -V, --version             print version number\n");
  fprintf(stdout, "  -h, --help                this help message\n");
  fprintf(stdout, "\n");
}

/* --------------------------------- */
/* ----- int main(int,char **) ----- */
/* --------------------------------- */
int main(int argc,char **argv)
{
  char *ifn, *ofn;                /* I/O filenames                            */
  sigstream_t *is;
  spfstream_t *os;
  float frate; /* real frame rate */
  struct spf_header_field * vh = NULL;
  int status;                     /* error status                             */

  int read_args(int, char **);
  int filter_bank_analysis(sigstream_t *, spfstream_t *);

  struct spf_header_field * set_header(const char *, float);
  void free_header(struct spf_header_field *);

  /* ----- process command line ----- */
  if (read_args(argc, argv))
    return(1);

  if (optind < argc)
    ifn = argv[optind++];
  else {
    fprintf(stderr, "sfbank error -- no input filename specified (use --help to get usage)\n");
    return(1);
  }

  if (optind < argc)
    ofn = argv[optind++];
  else {
    fprintf(stderr, "sfbank error -- no output filename specified (use --help to get usage)\n");
    return(1);
  }
  
  if (optind < argc) {
    fprintf(stderr, "sfbank error -- invalid number of arguments (use --help to get usage)\n");
    return(1);
  }
  
  /* ----- initialize necessary stuff ----- */
  if ((status = fft_init(fftnpts)) != 0) {
    fprintf(stderr, "sfbank error -- cannot initialize FFT with %d points\n", fftnpts);
    return(status);
  }
  
  /* ----- show what was asked to do ----- */
  if (trace) {
    fprintf(stdout, "%s --> %s\n", ifn, ofn);
    fflush(stdout);
  }
  
  /* ----- open input stream ----- */
  if ((is = sig_stream_open(ifn, format, Fs, ibs, swap)) == NULL) {
    fprintf(stderr, "sfbank error -- cannot open input stream %s\n", ifn);
    fft_reset();
    return(SPRO_STREAM_OPEN_ERR);
  }

  /* ----- open output stream ----- */
  frate = (unsigned long)(fm_d * is->Fs / 1000.0) / is->Fs; /* real frame period */

  if (with_header)
    if ((vh = set_header(ifn, is->Fs)) == NULL) {
      fprintf(stderr, "sfbank error -- cannot allocate memory\n");
      fft_reset(); sig_stream_close(is);
      return(SPRO_ALLOC_ERR);
    }

  if ((os = spf_output_stream_open(ofn, nfilters, 0, flag, 1.0 / frate, vh, obs)) == NULL) {
    fprintf(stderr, "sfbank error -- cannot open output stream %s\n", ofn);
    fft_reset(); sig_stream_close(is);
    return(SPRO_STREAM_OPEN_ERR);
  }

  free_header(vh);

  /* ----- run filter bank analysis ----- */
  if ((status = filter_bank_analysis(is, os)) != 0) {
    fprintf(stderr, "sfbank error -- error processing input stream %s\n", ifn);
    fft_reset(); sig_stream_close(is); spf_stream_close(os);
    return(status);
  }
  
  /* ----- clean ----- */
  sig_stream_close(is);
  spf_stream_close(os);

  fft_reset();

  return(0);
}

/* ------------------------------------------------------------------ */
/* ----- int filter_bank_analysis(sigstream_t *, spfstream_t *) ----- */
/* ------------------------------------------------------------------ */
/*
 * Main standard loop for filter bank analysis.
 */
int filter_bank_analysis(sigstream_t *is, spfstream_t *os)
{
  unsigned short *idx;
  unsigned long l, d;
  float *w;
  sample_t *buf;
  spsig_t *s;
  spf_t *e;
  int status;

  l = (unsigned long)(fm_l * is->Fs / 1000.0); /* frame length in samples */
  d = (unsigned long)(fm_d * is->Fs / 1000.0); /* frame shift in samples */

  /* ----- initialize some more stuff ----- */ 
  if ((s = sig_alloc(l)) == NULL) /* frame signal */
    return(SPRO_ALLOC_ERR);

  if (win) {
    if ((buf = (sample_t *)malloc(l * sizeof(sample_t))) == NULL) /* frame buffer */
      return(SPRO_ALLOC_ERR);
    if ((w = set_sig_win(l, win)) == NULL) {
      free(buf); sig_free(s);
      return(SPRO_ALLOC_ERR);    
    }
  }
  else {
    buf = s->s;
    w = (float *)NULL;
  }

  if ((e = (spf_t *)malloc(nfilters * sizeof(spf_t))) == NULL) {
    if (win) free(buf); sig_free(s);
    return(SPRO_ALLOC_ERR);
  }

  if (usemel) {
    if ((idx = set_mel_idx(nfilters, f_min / is->Fs, f_max / is->Fs, is->Fs)) == NULL) {
      if (win) free(buf); free(e); sig_free(s); if (win) free(w);
      return(SPRO_ALLOC_ERR);
    }
  }
  else if ((idx = set_alpha_idx(nfilters, alpha, f_min / is->Fs, f_max / is->Fs)) == NULL) {
    if (win) free(buf); free(e); sig_free(s); if (win) free(w);
    return(SPRO_ALLOC_ERR);
  }

  /* ----- loop on each frame ----- */
  while (get_next_sig_frame(is, channel, l, d, emphco, buf)) {

    /* weight signal */
    if (win)
      sig_weight(s, buf, w);

    /* apply the filter bank */
    if ((status = log_filter_bank(s, nfilters, idx, e)) != 0) {
      if (win) free(buf); if (win) free(w); free(e); sig_free(s); free(idx);
      return(status);
    }

    /* add vector to data */
    if (spf_stream_write(os, e, 1) != 1) { 
      if (win) free(buf); free(e); sig_free(s); if (win) free(w);
      return(SPRO_FEATURE_WRITE_ERR);
    }
  }
  
  /* ----- reset memory ----- */
  if (win) {
    free(buf); 
    free(w);
  }  
  free(e); 
  sig_free(s); 
  free(idx);

  return(0);
}

/* --------------------------------------------------------------------- */
/* ----- struct spf_header_field * set_header(const char *, float) ----- */
/* --------------------------------------------------------------------- */
/*
 * Create variable length header.
 */
#define MAX_NUM_HEADER_FIELDS 9

struct spf_header_field * set_header(const char *ifn, float Fs)
{
  char str[2048];
  struct spf_header_field * p;
  int i = 0;

  void free_header(struct spf_header_field *);

  if ((p = (struct spf_header_field *)malloc((MAX_NUM_HEADER_FIELDS + 1) * sizeof(struct spf_header_field))) == NULL)
    return(NULL);

  for (i = 0; i <= MAX_NUM_HEADER_FIELDS; i++)
    p[i].name = p[i].value = NULL;

  i = 0;

  /* source file */
  sprintf(str, "%s:%1d", ifn, channel);
  p[i].name = strdup("source_filename"); p[i++].value = strdup(str);

  /* frame stuff:_length, shift, rate and pre-emphasis */
  sprintf(str, "%f", fm_l / 1000.0);
  p[i].name = strdup("frame_length"); p[i++].value = strdup(str);

  sprintf(str, "%f", fm_d / 1000.0);
  p[i].name = strdup("frame_shift"); p[i++].value = strdup(str);

  sprintf(str, "%f", emphco);
  p[i].name = strdup("pre_emphasis"); p[i++].value = strdup(str);

  /* analysis type */
  sprintf(str, "fbank(%d)", nfilters);
  p[i].name = strdup("feature_type"); p[i++].value = strdup(str);

  /* miscellaneous parameters */
  sprintf(str, "%d", fftnpts);
  p[i].name = strdup("fft_length"); p[i++].value = strdup(str);

  if (usemel) {
    p[i].name = strdup("frequency_warping"); p[i++].value = strdup("mel");
  }
  else if (alpha != 0.0) {
    sprintf(str, "%f", alpha);
    p[i].name = strdup("frequency_warping"); p[i++].value = strdup(str);
  }
  else {
    p[i].name = strdup("frequency_warping"); p[i++].value = strdup("linear");
  }

  sprintf(str, "%.1f", f_min);
  p[i].name = strdup("lower_frequency"); p[i++].value = strdup(str);

  sprintf(str, "%.1f", (f_max == 0) ? Fs / 2 : f_max);
  p[i].name = strdup("higher_frequency"); p[i++].value = strdup(str);
  
  /* check all fields were set */
  while (i) {

    i--;

    if (p[i].name == NULL || p[i].value == NULL) {
      free_header(p);
      return(NULL);
    }
  }
  
  return(p);
}

/* ------------------------------------------------------- */
/* ----- void free_header(struct spf_header_field *) ----- */
/* ------------------------------------------------------- */
void free_header(struct spf_header_field *p)
{
  int i;

  if (p) {

    for (i = 0; i < MAX_NUM_HEADER_FIELDS; i++) {
      if (p[i].name)
	free(p[i].name);

      if (p[i].value)
	free(p[i].value);
    }

    free(p);
  }
}

/* --------------------------------------- */
/* ----- int read_args(int, char **) ----- */
/* --------------------------------------- */
/*
 *  -F, --format=s            signal file format (pcm)
 *  -f, --sample-rate=f       signal sample rate (8000 Hz)
 *  -x, --channel=n           use channel number (n) (1)
 *  -B, --swap                swap input stream samples
 *  -M, --input-bufsize=n     input buffer size (in bytes)
 *  -S, --output-bufsize=n    output buffer size (in bytes)
 *  -H, --header              output variable length header (don't)
 *  -k, --pre-emphasis=f      pre-emphasis coefficient (0.95)
 *  -l, --length=f            frame length in ms (20 ms)
 *  -d, --shift=f             frame shift in ms (10 ms)
 *  -w, --window=s            weighting window (hamming)
 *  -n, --num-filter=n        number of filters in the filter-bank (24)
 *  -a, --alpha=n             frequency warping parameter (0.0)
 *  -m, --mel                 use MEL frequency scale (off)
 *  -i, --freq-min=f          lower frequency bound (0 Hz)
 *  -u, --freq-max=f          higher frequency bound (Fs/2)
 *  -b, --fft-length=n        FFT length (512)
 *  -D, --delta               
 *  -A, --acceleration
 *  -v, --verbose             verbose mode
 *  -V, --version             print version number
 *  -h, --help
 */
int read_args(int argc, char **argv)
{
  int c, i;
  char *p;

  struct option longopts[] = {
    {"format", required_argument, NULL, 'F'},
    {"sample-rate", required_argument, NULL, 'f'},
    {"channel", required_argument, NULL, 'x'},
    {"swap", no_argument, NULL, 'B'},
    {"input-bufsize", required_argument, NULL, 'I'},
    {"output-bufsize", required_argument, NULL, 'O'},
    {"header", no_argument, NULL, 'H'},
    {"pre-emphasis", required_argument, NULL, 'k'},
    {"length", required_argument, NULL, 'l'},
    {"shift", required_argument, NULL, 'd'},
    {"window", required_argument, NULL, 'w'},
    {"num-filter", required_argument, NULL, 'n'},
    {"alpha", required_argument, NULL, 'a'},
    {"mel", no_argument, NULL, 'm'},
    {"freq-min", required_argument, NULL, 'i'},
    {"freq-max", required_argument, NULL, 'u'},
    {"fft-length", required_argument, NULL, 'b'},
    {"delta", no_argument, NULL, 'D'},
    {"acceleration", no_argument, NULL, 'A'},
    {"verbose", no_argument, NULL, 'v'},
    {"version", no_argument, NULL, 'V'},
    {"help", no_argument, NULL, 'h'},
    {0, 0, 0, 0}
  };

  opterr = 0;
  optopt = '!';

  while ((c = getopt_long(argc, argv, "F:f:x:BI:O:Hk:l:d:w:n:a:mi:u:b:DAvVh", longopts, &i)) != EOF)

    switch (c) {

    case 'F':
      if (strcasecmp(optarg, "pcm16") == 0)
	format = SPRO_SIG_PCM16_FORMAT;
       else if(strcasecmp(optarg, "alaw") == 0)
	format = SPRO_SIG_ALAW_FORMAT;
      else if(strcasecmp(optarg, "ulaw") == 0)
	format = SPRO_SIG_ULAW_FORMAT;
     else if(strcasecmp(optarg, "wave") == 0)
	format = SPRO_SIG_WAVE_FORMAT;
#ifdef SPHERE
      else if(strcasecmp(optarg, "sphere") == 0)
	format = SPRO_SIG_SPHERE_FORMAT;
#endif
      else {
	fprintf(stderr, "sfbank error -- unknown input signal format %s with --format\n", optarg);
	fprintf(stderr, "                must be one of PCM16, ALAW, ULAW, WAVE or SPHERE.\n");
	return(1);
      }
      break;

    case 'f':
      Fs = (float)strtod(optarg, &p);
      if (p == optarg || *p != 0) {
	fprintf(stderr, "sfbank error -- invalid argument %s to --sample-rate (use --help to get usage)\n", optarg);
	return(1);
      }
      break;

    case 'x':
      channel = (int)strtol(optarg, &p, 10);
      if (p == optarg || *p != 0) {
	fprintf(stderr, "sfbank error -- invalid argument %s to --channel (use --help to get usage)\n", optarg);
	return(1);
      }
      if (channel < 1 || channel > 2) {
	fprintf(stderr, "sfbank error -- invalid channel number %d (not in [1,2])\n", channel);
	return(1);
      }
      break;

    case 'B':
      swap = 1;
      break;

    case 'I':
      ibs = (size_t)strtol(optarg, &p, 10) * 1000;
      if (p == optarg || *p != 0) {
	fprintf(stderr, "sfbank error -- invalid argument %s to --input-bufsize (use --help to get usage)\n", optarg);
	return(1);
      }
      break;

    case 'O':
      obs = (size_t)strtol(optarg, &p, 10) * 1000;
      if (p == optarg || *p != 0) {
	fprintf(stderr, "sfbank error -- invalid argument %s to --output-bufsize (use --help to get usage)\n", optarg);
	return(1);
      }
      break;

    case 'H':
      with_header = 1;
      break;

    case 'k':
      emphco = (float)strtod(optarg, &p);
      if (p == optarg || *p != 0) {
	fprintf(stderr, "sfbank error -- invalid argument %s to --pre-emphasis (use --help to get usage)\n", optarg);
	return(1);
      }
      if (emphco < 0 || emphco >= 1.0) {
	fprintf(stderr, "sfbank error -- invalid pre-emphasis coefficient %f (not in [0,1[)\n", emphco);
	return(1);
      }
      break;

    case 'l':
      fm_l = (float)strtod(optarg, &p);
      if (p == optarg || *p != 0) {
	fprintf(stderr, "sfbank error -- invalid argument %s to --length (use --help to get usage)\n", optarg);
	return(1);
      }
      break;

    case 'd':
      fm_d = (float)strtod(optarg, &p);
      if (p == optarg || *p != 0) {
	fprintf(stderr, "sfbank error -- invalid argument %s to --shift (use --help to get usage)\n", optarg);
	return(1);
      }
      break;

    case 'w':
      if (strcasecmp(optarg, "none") == 0)
	win = SPRO_NULL_WINDOW;
      else if (strcasecmp(optarg, "hamming") == 0)
	win = SPRO_HAMMING_WINDOW;
      else if (strcasecmp(optarg, "hanning") == 0)
	win = SPRO_HANNING_WINDOW;
      else if (strcasecmp(optarg, "blackman") == 0)
	win = SPRO_BLACKMAN_WINDOW;
      else {
	fprintf(stderr, "sfbank error -- unknown window type %s with --window\n", optarg);
	fprintf(stderr, "                must be one of NONE, HAMMING, HANNING or BLACKMAN.\n");
	return(1);
      }
      break;

    case 'n':
      nfilters = (unsigned short)strtol(optarg, &p, 10);
      if (p == optarg || *p != 0) {
	fprintf(stderr, "sfbank error -- invalid argument %s to --num-filter (use --help to get usage)\n", optarg);
	return(1);
      }
      if (nfilters < SPRO_MIN_FILTERS || nfilters > SPRO_MAX_FILTERS) {
	fprintf(stderr, "sfbank error -- invalid number of filters %d (not in [%d,%d])\n", 
		nfilters, SPRO_MIN_FILTERS, SPRO_MAX_FILTERS);
	return(1);    
      }
      break;

    case 'a':
      alpha = (float)strtod(optarg, &p);
      if (p == optarg || *p != 0) {
	fprintf(stderr, "sfbank error -- invalid argument %s to --alpha (use --help to get usage)\n", optarg);
	return(1);
      }
      if (alpha <= -1 || alpha >= 1) {
	fprintf(stderr, "sfbank error -- invalid spectral resolution coefficient %f (not in ]-1,1[)\n", alpha);
	return(1);
      }
      break;

    case 'm':
      usemel = 1;
      break;

    case 'i':
      f_min = (float)strtod(optarg, &p);
      if (p == optarg || *p != 0) {
	fprintf(stderr, "sfbank error -- invalid argument %s to --freq-min (use --help to get usage)\n", optarg);
	return(1);
      }
      break;

    case 'u':
      f_max = (float)strtod(optarg, &p);
      if (p == optarg || *p != 0) {
	fprintf(stderr, "sfbank error -- invalid argument %s to --freq-max (use --help to get usage)\n", optarg);
	return(1);
      }
      break;

    case 'b':
      fftnpts = (int)strtol(optarg, &p, 10);
      if (p == optarg || *p != 0) {
	fprintf(stderr, "sfbank error -- invalid argument %s to --fft-length (use --help to get usage)\n", optarg);
	return(1);
      }
      if (fftnpts < SPRO_MIN_FFT_SIZE || fftnpts > SPRO_MAX_FFT_SIZE) {
	fprintf(stderr, "sfbank error -- invalid FFT length %d (not in [%d,%d])\n", 
		fftnpts, SPRO_MIN_FFT_SIZE, SPRO_MAX_FFT_SIZE);
	return(1);
      }
      break;

    case 'D':
      flag |= WITHD;
      break;

    case 'A':
      flag |= WITHA;
      break;

    case 'v':
      trace = 1;
      break;

    case 'V':
      fprintf(stdout, "\nSPro %s -- %s\n\n", VERSION, cvsid);
      exit(0);
      break;

    case 'h':
      usage();
      exit(0);
      break;

    default:
      fprintf(stderr, "sfbank error -- unrecognized option %s (use --help to get usage)\n", argv[optind-1]);
      return(1);
    }

  /* ----- basic argument sanity check ----- */
  if (usemel && alpha != 0.0)
    fprintf(stderr, "sfbank warning -- ignoring --alpha option with --mel specified\n");

  if (f_max != 0.0 && f_min != 0.0 && f_max <= f_min) {
    fprintf(stderr, "sfbank error -- invalid frequency range specification\n");
    return(1);
  }

  if ((flag | WITHA) && !(flag | WITHD)) {
    fprintf(stderr, "sfbank error -- cannot specify --acceleration without --delta\n");
    return(1);
  }

  if (fm_l < fm_d)
    fprintf(stderr, "sfbank warning -- using non overlapping frames\n");
  return(0);
}

#undef _sfbank_c_