libsent/src/hmminfo/hmm_lookup.c

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/*
 * Copyright (c) 1991-2007 Kawahara Lab., Kyoto University
 * Copyright (c) 2000-2005 Shikano Lab., Nara Institute of Science and Technology
 * Copyright (c) 2005-2007 Julius project team, Nagoya Institute of Technology
 * All rights reserved
 */

/* physical HMMs ... already indexed when reading in hmmdefs */
/* logical HMMs  ... already indexed when reading in HMMList */

#include <sent/stddefs.h>
#include <sent/htk_hmm.h>
#include <sent/ptree.h>

HTK_HMM_Data *
htk_hmmdata_lookup_physical(HTK_HMM_INFO *hmminfo, char *keyname)
{
  HTK_HMM_Data *tmp;
  tmp = aptree_search_data(keyname, hmminfo->physical_root);
  if (tmp != NULL && strmatch(tmp->name, keyname)) {
    return tmp;
  } else {
    return NULL;
  }
}

HMM_Logical *
htk_hmmdata_lookup_logical(HTK_HMM_INFO *hmminfo, char *keyname)
{
  HMM_Logical *tmp;
  tmp = aptree_search_data(keyname, hmminfo->logical_root);
  if (tmp != NULL && strmatch(tmp->name, keyname)) {
    return tmp;
  } else {
    return NULL;
  }
}

static void
hmm_count_logical_num(HTK_HMM_INFO *hmminfo)
{
  HMM_Logical *lg;
  int n;

  n = 0;
  for (lg = hmminfo->lgstart; lg; lg = lg->next) n++;
  hmminfo->totallogicalnum = n;
}

void
hmm_add_physical_to_logical(HTK_HMM_INFO *hmminfo)
{
  HMM_Logical *new, *match = NULL;
  HTK_HMM_Data *ph;

  for (ph = hmminfo->start; ph; ph = ph->next) {

    /* check if same name already exist */
    if (hmminfo->logical_root != NULL) {
      match = aptree_search_data(ph->name, hmminfo->logical_root);
      if (match != NULL && strmatch(match->name, ph->name)) {
        /* the physcal name was already mapped to other HMMs in HMMList */
        jlog("Warning: hmm_lookup: \"%s\" is defined in hmmdefs, but \"%s\" will be used instead\n", ph->name, (match->body.defined)->name);
        continue;
      }
    }
    /* create new HMM_Logical */
    /* body refers to the physical HMM */
    new = (HMM_Logical *)mybmalloc2(sizeof(HMM_Logical), &(hmminfo->lroot));
    new->name = (char *)mybmalloc2(strlen(ph->name) + 1, &(hmminfo->lroot));
    strcpy(new->name, ph->name);
    new->is_pseudo = FALSE;
    new->body.defined = ph;
    new->next = hmminfo->lgstart;
    hmminfo->lgstart = new;
    if (hmminfo->logical_root == NULL) {
      hmminfo->logical_root = aptree_make_root_node(new);
    } else {
      aptree_add_entry(new->name, new, match->name, &(hmminfo->logical_root));
    }
  }

  /* re-count total number */
  hmm_count_logical_num(hmminfo);
}


static int add_count;           

static boolean
hmm_add_pseudo_phones_sub(HTK_HMM_INFO *hmminfo, char *name)
{
  HMM_Logical *new, *match;

  /* check if already exist */
  match = aptree_search_data(name, hmminfo->logical_root);
  if (match != NULL && strmatch(match->name, name)) {
    /* already exist in list */
    /*    if (! match->is_pseudo) {*/
      /* this pseudo-HMM is already defined as real HMM in hmmdefs or in HMMList */
    /*designated_count++;
      }*/
  } else {
    /* create new HMM_Logical with pseudo body */
    new = (HMM_Logical *)mybmalloc2(sizeof(HMM_Logical), &(hmminfo->lroot));
    new->name = (char *)mybmalloc2(strlen(name) + 1, &(hmminfo->lroot));
    strcpy(new->name, name);
    new->is_pseudo = TRUE;
    new->body.pseudo = cdset_lookup(hmminfo, name);
    if (new->body.pseudo == NULL) {     /* should never happen */
      jlog("Error: hmm_lookup: tried to add pseudo phone \"%s\" to logical HMM, but no corresponding CD_Set found.  Why??\n");
      return FALSE;
    }
    new->next = hmminfo->lgstart;
    hmminfo->lgstart = new;
    if (hmminfo->logical_root == NULL) {
      hmminfo->logical_root = aptree_make_root_node(new);
    } else {
      aptree_add_entry(new->name, new, match->name, &(hmminfo->logical_root));
    }
    add_count++;
  }
  return TRUE;
}
    
void
hmm_add_pseudo_phones(HTK_HMM_INFO *hmminfo)
{
  HMM_Logical *lg;
  static char buf[MAX_HMMNAME_LEN];
  boolean ok_p = TRUE;

  add_count = 0;
  /* add pseudo monophone */
  for (lg = hmminfo->lgstart; lg; lg = lg->next) {
    if (lg->is_pseudo) continue;
    if (hmm_add_pseudo_phones_sub(hmminfo, center_name(lg->name, buf)) == FALSE) {
      jlog("Error: hmm_lookup: failed to add \"%s\" as logical\n", center_name(lg->name, buf));
      ok_p = FALSE;
    }
  }
  /* add pseudo biphone, i.e. "a-k" etc. */
  for (lg = hmminfo->lgstart; lg; lg = lg->next) {
    if (lg->is_pseudo) continue;
    if (hmm_add_pseudo_phones_sub(hmminfo, leftcenter_name(lg->name, buf)) == FALSE) {
      jlog("Error: hmm_lookup: failed to add \"%s\" as logical\n", leftcenter_name(lg->name, buf));
      ok_p = FALSE;
    }
  }
  /* add pseudo biphone, i.e. "k+e" etc. */
  for (lg = hmminfo->lgstart; lg; lg = lg->next) {
    if (lg->is_pseudo) continue;
    if (hmm_add_pseudo_phones_sub(hmminfo, rightcenter_name(lg->name, buf)) == FALSE) {
      jlog("Error: hmm_lookup: failed to add \"%s\" as logical\n", rightcenter_name(lg->name, buf));
      ok_p = FALSE;
    }
  }
  jlog("Stat: hmm_lookup: %d pseudo phones are added to logical HMM list\n", add_count);
  hmminfo->totalpseudonum = add_count;
  /* re-count total number */
  hmm_count_logical_num(hmminfo);
}

int
hmm_logical_state_num(HMM_Logical *lg)
{
  int len;
  if (lg->is_pseudo) len = lg->body.pseudo->state_num;
  else len = lg->body.defined->state_num;
  return(len);
}

HTK_HMM_Trans *
hmm_logical_trans(HMM_Logical *lg)
{
  HTK_HMM_Trans *tr;
  if (lg->is_pseudo) tr = lg->body.pseudo->tr;
  else tr = lg->body.defined->tr;
  return(tr);
}

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