libjulius/src/m_fusion.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
 */

#include <julius/julius.h>

static HTK_HMM_INFO *
initialize_HMM(JCONF_AM *amconf, Jconf *jconf)
{
  HTK_HMM_INFO *hmminfo;

  /* at here, global variable "para" holds values specified by user or
     by user-specified HTK config file */
  if (amconf->analysis.para_hmm.loaded == 1) {
    jlog("Warning: you seems to read more than one acoustic model for recognition, but\n");
    jlog("Warning: previous one already has header-embedded acoustic parameters\n");
    jlog("Warning: if you have different parameters, result may be wrong!\n");
  }
  
  /* allocate new hmminfo */
  hmminfo = hmminfo_new();
  /* load hmmdefs */
  if (init_hmminfo(hmminfo, amconf->hmmfilename, amconf->mapfilename, &(amconf->analysis.para_hmm)) == FALSE) {
    hmminfo_free(hmminfo);
    return NULL;
  }

  /* set multipath mode flag */
  if (amconf->force_multipath) {
    jlog("STAT: m_fusion: force multipath HMM handling by user request\n");
    hmminfo->multipath = TRUE;
  } else {
    hmminfo->multipath = hmminfo->need_multipath;
  }

  /* only MFCC is supported for audio input */
  /* MFCC_{0|E}[_D][_A][_Z][_N] is supported */
  /* check parameter type of this acoustic HMM */
  if (jconf->input.speech_input != SP_MFCFILE) {
    /* Decode parameter extraction type according to the training
       parameter type in the header of the given acoustic HMM */
    if ((hmminfo->opt.param_type & F_BASEMASK) != F_MFCC) {
      jlog("ERROR: m_fusion: for direct speech input, only HMM trained by MFCC is supported\n");
      hmminfo_free(hmminfo);
      return NULL;
    }
    /* set acoustic analysis parameters from HMM header */
    calc_para_from_header(&(amconf->analysis.para), hmminfo->opt.param_type, hmminfo->opt.vec_size);
  }
  /* check if tied_mixture */
  if (hmminfo->is_tied_mixture && hmminfo->codebooknum <= 0) {
    jlog("ERROR: m_fusion: this tied-mixture model has no codebook!?\n");
    hmminfo_free(hmminfo);
    return NULL;
  }

#ifdef PASS1_IWCD
  /* make state clusters of same context for inter-word triphone approx. */
  if (hmminfo->is_triphone) {
    jlog("STAT: making pseudo bi/mono-phone for IW-triphone\n");
    if (make_cdset(hmminfo) == FALSE) {
      jlog("ERROR: m_fusion: failed to make context-dependent state set\n");
      hmminfo_free(hmminfo);
      return NULL;
    }
    /* add those `pseudo' biphone and monophone to the logical HMM names */
    /* they points not to the defined HMM, but to the CD_Set structure */
    hmm_add_pseudo_phones(hmminfo);
  }
#endif

  /* find short pause model and set to hmminfo->sp */
  htk_hmm_set_pause_model(hmminfo, amconf->spmodel_name);


  hmminfo->cdset_method = amconf->iwcdmethod;
  hmminfo->cdmax_num = amconf->iwcdmaxn;

  if (amconf->analysis.para_htk.loaded == 1) apply_para(&(amconf->analysis.para), &(amconf->analysis.para_htk));
  if (amconf->analysis.para_hmm.loaded == 1) apply_para(&(amconf->analysis.para), &(amconf->analysis.para_hmm));
  apply_para(&(amconf->analysis.para), &(amconf->analysis.para_default));

  return(hmminfo);
  
}

static HTK_HMM_INFO *
initialize_GSHMM(JCONF_AM *amconf)
{
  HTK_HMM_INFO *hmm_gs;
  Value para_dummy;

  jlog("STAT: Reading GS HMMs:\n");
  hmm_gs = hmminfo_new();
  undef_para(&para_dummy);
  if (init_hmminfo(hmm_gs, amconf->hmm_gs_filename, NULL, &para_dummy) == FALSE) {
    hmminfo_free(hmm_gs);
    return NULL;
  }
  return(hmm_gs);
}

static HTK_HMM_INFO *
initialize_GMM(Jconf *jconf)
{
  HTK_HMM_INFO *gmm;
  
  jlog("STAT: reading GMM: %s\n", jconf->reject.gmm_filename);
  gmm = hmminfo_new();
  if (init_hmminfo(gmm, jconf->reject.gmm_filename, NULL, &(jconf->gmm->analysis.para_hmm)) == FALSE) {
    hmminfo_free(gmm);
    return NULL;
  }
  /* check parameter type of this acoustic HMM */
  if (jconf->input.speech_input != SP_MFCFILE) {
    /* Decode parameter extraction type according to the training
       parameter type in the header of the given acoustic HMM */
    if ((gmm->opt.param_type & F_BASEMASK) != F_MFCC) {
      jlog("ERROR: m_fusion: for direct speech input, only GMM trained by MFCC is supported\n");
      hmminfo_free(gmm);
      return NULL;
    }
  }

  /* set acoustic analysis parameters from HMM header */
  calc_para_from_header(&(jconf->gmm->analysis.para), gmm->opt.param_type, gmm->opt.vec_size);

  if (jconf->gmm->analysis.para_htk.loaded == 1) apply_para(&(jconf->gmm->analysis.para), &(jconf->gmm->analysis.para_htk));
  if (jconf->gmm->analysis.para_hmm.loaded == 1) apply_para(&(jconf->gmm->analysis.para), &(jconf->gmm->analysis.para_hmm));
  apply_para(&(jconf->gmm->analysis.para), &(jconf->gmm->analysis.para_default));

  return(gmm);
}

static WORD_INFO *
initialize_dict(JCONF_LM *lmconf, HTK_HMM_INFO *hmminfo)
{
  WORD_INFO *winfo;

  /* allocate new word dictionary */
  winfo = word_info_new();
  /* read in dictinary from file */
  if ( ! 
#ifdef MONOTREE
      /* leave winfo monophone for 1st pass lexicon tree */
       init_voca(winfo, lmconf->dictfilename, hmminfo, TRUE, lmconf->forcedict_flag)
#else 
       init_voca(winfo, lmconf->dictfilename, hmminfo, FALSE, lmconf->forcedict_flag)
#endif
       ) {
    jlog("ERROR: m_fusion: failed to read dictionary, terminated\n");
    word_info_free(winfo);
    return NULL;
  }

  if (lmconf->lmtype == LM_PROB) {
    /* if necessary, append a IW-sp word to the dict if "-iwspword" specified */
    if (lmconf->enable_iwspword) {
      if (
#ifdef MONOTREE
          voca_append_htkdict(lmconf->iwspentry, winfo, hmminfo, TRUE)
#else 
          voca_append_htkdict(lmconf->iwspentry, winfo, hmminfo, FALSE)
#endif
          == FALSE) {
        jlog("ERROR: m_fusion: failed to make IW-sp word entry \"%s\"\n", lmconf->iwspentry);
        word_info_free(winfo);
        return NULL;
      } else {
        jlog("STAT: 1 IW-sp word entry added\n");
      }
    }
    /* set {head,tail}_silwid */
    winfo->head_silwid = voca_lookup_wid(lmconf->head_silname, winfo);
    if (winfo->head_silwid == WORD_INVALID) { /* not exist */
      jlog("ERROR: m_fusion: head sil word \"%s\" not exist in voca\n", lmconf->head_silname);
      word_info_free(winfo);
      return NULL;
    }
    winfo->tail_silwid = voca_lookup_wid(lmconf->tail_silname, winfo);
    if (winfo->tail_silwid == WORD_INVALID) { /* not exist */
      jlog("ERROR: m_fusion: tail sil word \"%s\" not exist in voca\n", lmconf->tail_silname);
      word_info_free(winfo);
      return NULL;
    }
  }
  
  return(winfo);
  
}


static NGRAM_INFO *
initialize_ngram(JCONF_LM *lmconf, WORD_INFO *winfo)
{
  NGRAM_INFO *ngram;
  boolean ret;

  /* allocate new */
  ngram = ngram_info_new();
  /* load LM */
  if (lmconf->ngram_filename != NULL) { /* binary format */
    ret = init_ngram_bin(ngram, lmconf->ngram_filename);
  } else {                      /* ARPA format */
    /* if either forward or backward N-gram is specified, read it */
    /* if both specified, use backward N-gram as main and
       use forward 2-gram only for 1st pass (this is an old behavior) */
    if (lmconf->ngram_filename_rl_arpa) {
      ret = init_ngram_arpa(ngram, lmconf->ngram_filename_rl_arpa, DIR_RL);
      if (ret == FALSE) {
        ngram_info_free(ngram);
        return NULL;
      }
      if (lmconf->ngram_filename_lr_arpa) {
        ret = init_ngram_arpa_additional(ngram, lmconf->ngram_filename_lr_arpa);
        if (ret == FALSE) {
          ngram_info_free(ngram);
          return NULL;
        }
      }
    } else if (lmconf->ngram_filename_lr_arpa) {
      ret = init_ngram_arpa(ngram, lmconf->ngram_filename_lr_arpa, DIR_LR);
    }
  }
  if (ret == FALSE) {
    ngram_info_free(ngram);
    return NULL;
  }

  /* map dict item to N-gram entry */
  make_voca_ref(ngram, winfo);

  return(ngram);
}

boolean
j_load_am(Recog *recog, JCONF_AM *amconf)
{
  PROCESS_AM *am;

  jlog("STAT: *** loading AM%02d %s\n", amconf->id, amconf->name);

  /* create AM process instance */
  am = j_process_am_new(recog, amconf);
  
  /* HMM */
  if ((am->hmminfo = initialize_HMM(amconf, recog->jconf)) == NULL) {
    jlog("ERROR: m_fusion: failed to initialize AM\n");
    return FALSE;
  }
  if (amconf->hmm_gs_filename != NULL) {
    if ((am->hmm_gs = initialize_GSHMM(amconf)) == NULL) {
      jlog("ERROR: m_fusion: failed to initialize GS HMM\n");
      return FALSE;
    }
  }

  /* fixate model-specific params */
  /* set params whose default will change by models and not specified in arg */
  /* select Gaussian pruning function */
  if (am->config->gprune_method == GPRUNE_SEL_UNDEF) {/* set default if not specified */
    if (am->hmminfo->is_tied_mixture) {
      /* enabled by default for tied-mixture models */
#ifdef GPRUNE_DEFAULT_SAFE
      am->config->gprune_method = GPRUNE_SEL_SAFE;
#elif GPRUNE_DEFAULT_HEURISTIC
      am->config->gprune_method = GPRUNE_SEL_HEURISTIC;
#elif GPRUNE_DEFAULT_BEAM
      am->config->gprune_method = GPRUNE_SEL_BEAM;
#endif
    } else {
      /* disabled by default for non tied-mixture model */
      am->config->gprune_method = GPRUNE_SEL_NONE;
    }
  }
  
  /* fixated analysis.para not uses loaded flag any more, so
     reset it for binary matching */
  amconf->analysis.para.loaded = 0;

  jlog("STAT: *** AM%02d %s loaded\n", amconf->id, amconf->name);

  return TRUE;
}

boolean
j_load_lm(Recog *recog, JCONF_LM *lmconf)
{
  JCONF_SEARCH *sh;
  PROCESS_LM *lm;
  PROCESS_AM *am, *atmp;

  jlog("STAT: *** loading LM%02d %s\n", lmconf->id, lmconf->name);

  /* find which am process instance to assign to each LM */
  am = NULL;
  for(sh=recog->jconf->search_root;sh;sh=sh->next) {
    if (sh->lmconf == lmconf) {
      for(atmp=recog->amlist;atmp;atmp=atmp->next) {
        if (sh->amconf == atmp->config) {
          am = atmp;
        }
      }
    }
  }
  if (am == NULL) {
    jlog("ERROR: cannot find corresponding AM for LM%02d %s\n", lmconf->id, lmconf->name);
    jlog("ERROR: you should write all AM/LM combinations to be used for recognition with \"-SR\"\n");
    return FALSE;
  }

  /* create LM process instance */
  lm = j_process_lm_new(recog, lmconf);

  /* assign AM process instance to the LM instance */
  lm->am = am;

  /* load language model */
  if (lm->lmtype == LM_PROB) {
    /* LM (N-gram) */
    if ((lm->winfo = initialize_dict(lm->config, lm->am->hmminfo)) == NULL) {
      jlog("ERROR: m_fusion: failed to initialize dictionary\n");
      return FALSE;
    }
    if (lm->config->ngram_filename_lr_arpa || lm->config->ngram_filename_rl_arpa || lm->config->ngram_filename) {
      if ((lm->ngram = initialize_ngram(lm->config, lm->winfo)) == NULL) {
        jlog("ERROR: m_fusion: failed to initialize N-gram\n");
        return FALSE;
      }
    }
  }
  if (lm->lmtype == LM_DFA) {
    /* DFA */
    if (lm->config->dfa_filename != NULL && lm->config->dictfilename != NULL) {
      /* here add grammar specified by "-dfa" and "-v" to grammar list */
      multigram_add_gramlist(lm->config->dfa_filename, lm->config->dictfilename, lm->config, LM_DFA_GRAMMAR);
    }
    /* load all the specified grammars */
    if (multigram_load_all_gramlist(lm) == FALSE) {
      jlog("ERROR: m_fusion: some error occured in reading grammars\n");
      return FALSE;
    }
    /* setup for later wchmm building */
    multigram_update(lm);
    /* the whole lexicon will be forced to built in the boot sequence,
       so reset the global modification flag here */
    lm->global_modified = FALSE;
  }
  
  jlog("STAT: *** LM%02d %s loaded\n", lmconf->id, lmconf->name);

  return TRUE;
}

/**********************************************************************/
boolean
j_load_all(Recog *recog, Jconf *jconf)
{
  JCONF_AM *amconf;
  JCONF_LM *lmconf;
  JCONF_SEARCH *sh;
  PROCESS_AM *am;
  PROCESS_LM *lm;

  /* set global jconf */
  recog->jconf = jconf;

  /* load acoustic models */
  for(amconf=jconf->am_root;amconf;amconf=amconf->next) {
    if (j_load_am(recog, amconf) == FALSE) return FALSE;
  }

  /* load language models */
  for(lmconf=jconf->lm_root;lmconf;lmconf=lmconf->next) {
    if (j_load_lm(recog, lmconf) == FALSE) return FALSE;
  }

  /* GMM */
  if (jconf->reject.gmm_filename != NULL) {
    jlog("STAT: loading GMM\n");
    if ((recog->gmm = initialize_GMM(jconf)) == NULL) {
      jlog("ERROR: m_fusion: failed to initialize GMM\n");
      return FALSE;
    }
  }

  /* check sampling rate requirement on AMs and set it to global jconf */
  {
    boolean ok_p;

    /* set input sampling rate from an AM */
    jconf->input.sfreq = jconf->am_root->analysis.para.smp_freq;
    jconf->input.period = jconf->am_root->analysis.para.smp_period;
    jconf->input.frameshift = jconf->am_root->analysis.para.frameshift;
    jconf->input.framesize = jconf->am_root->analysis.para.framesize;
    /* check if the value is equal at all AMs */
    ok_p = TRUE;
    for(amconf = jconf->am_root; amconf; amconf = amconf->next) {
      if (jconf->input.sfreq != amconf->analysis.para.smp_freq) ok_p = FALSE;
    }
    if (!ok_p) {
      jlog("ERROR: required sampling rate differs in AMs!\n");
      for(amconf = jconf->am_root; amconf; amconf = amconf->next) {
        jlog("ERROR: AM%02d %s: %dHz\n", amconf->analysis.para.smp_freq);
      }
      return FALSE;
    }
    for(amconf = jconf->am_root; amconf; amconf = amconf->next) {
      if (jconf->input.frameshift != amconf->analysis.para.frameshift) ok_p = FALSE;
    }
    if (!ok_p) {
      jlog("ERROR: requested frame shift differs in AMs!\n");
      for(amconf = jconf->am_root; amconf; amconf = amconf->next) {
        jlog("ERROR: AM%02d %s: %d samples\n", amconf->analysis.para.frameshift);
      }
      return FALSE;
    }
    for(amconf = jconf->am_root; amconf; amconf = amconf->next) {
      if (jconf->input.framesize != amconf->analysis.para.framesize) ok_p = FALSE;
    }
    if (!ok_p) {
      jlog("ERROR: requested frame size (window length) differs in AMs!\n");
      for(amconf = jconf->am_root; amconf; amconf = amconf->next) {
        jlog("ERROR: AM%02d %s: %d samples\n", amconf->analysis.para.framesize);
      }
      return FALSE;
    }
  }

  return TRUE;
}

static boolean
mfcc_config_is_same(JCONF_AM *amconf, MFCCCalc *mfcc)
{
  char *s1, *s2;

  /* parameter extraction conditions are the same */
  /* check exact match in amconf->analysis.* */
  if (&(amconf->analysis.para) == mfcc->para || memcmp(&(amconf->analysis.para), mfcc->para, sizeof(Value)) == 0) {
    s1 = amconf->analysis.cmnload_filename;
    s2 = mfcc->cmn.load_filename;
    if (s1 == s2 || (s1 && s2 && strmatch(s1, s2))) {
      s1 = amconf->analysis.cmnsave_filename;
      s2 = mfcc->cmn.save_filename;
      if (s1 == s2 || (s1 && s2 && strmatch(s1, s2))) {
        if (amconf->analysis.cmn_update == mfcc->cmn.update
            && amconf->analysis.cmn_map_weight == mfcc->cmn.map_weight) {
          if (amconf->frontend.ss_alpha == mfcc->frontend.ss_alpha
              && amconf->frontend.ss_floor == mfcc->frontend.ss_floor
              && amconf->frontend.sscalc == mfcc->frontend.sscalc
              && amconf->frontend.sscalc_len == mfcc->frontend.sscalc_len) {
            s1 = amconf->frontend.ssload_filename;
            s2 = mfcc->frontend.ssload_filename;
            if (s1 == s2 || (s1 && s2 && strmatch(s1, s2))) {
              return TRUE;
            }
          }
        }
      }
    }
  }

  return FALSE;
}

/***************************************************/
/* create MFCC calculation instance from AM config */
/* according to the fixated parameter information  */
/***************************************************/
void
create_mfcc_calc_instances(Recog *recog)
{
  PROCESS_AM *am;
  MFCCCalc *mfcc;
  int count;
  
  jlog("STAT: *** create MFCC calculation modules from AM\n");
  count = 0;
  for(am=recog->amlist;am;am=am->next) {
    for(mfcc=recog->mfcclist;mfcc;mfcc=mfcc->next) {
      if (mfcc_config_is_same(am->config, mfcc)) {
        /* the same */
        jlog("STAT: AM%02d %s: share MFCC%02d\n", am->config->id, am->config->name, mfcc->id);
        am->mfcc = mfcc;
        break;
      }
    }
    if (!mfcc) {                /* the same not found */
      /* initialize MFCC calculation work area */
      count++;
      /* create new mfcc instance */
      mfcc = j_mfcccalc_new(am->config);
      mfcc->id = count;
      /* assign to the am */
      am->mfcc = mfcc;
      /* add to the list of all MFCCCalc */
      mfcc->next = recog->mfcclist;
      recog->mfcclist = mfcc;
      jlog("STAT: AM%2d %s: create a new module MFCC%02d\n", am->config->id, am->config->name, mfcc->id);
    }
  }

  /* for GMM */
  if (recog->gmm) {
    /* if GMM calculation config found, make MFCC instance for that. */
    for(mfcc=recog->mfcclist;mfcc;mfcc=mfcc->next) {
      if (mfcc_config_is_same(recog->jconf->gmm, mfcc)) {
        /* the same */
        jlog("STAT: GMM: share MFCC%02d\n", mfcc->id);
        recog->gmmmfcc = mfcc;
        break;
        }
    }
    if (!mfcc) {                /* the same not found */
      /* initialize MFCC calculation work area */
      count++;
      /* create new mfcc instance */
      mfcc = j_mfcccalc_new(recog->jconf->gmm);
      mfcc->id = count;
      /* assign to gmm */
      recog->gmmmfcc = mfcc;
      /* add to the list of all MFCCCalc */
      mfcc->next = recog->mfcclist;
      recog->mfcclist = mfcc;
      jlog("STAT: GMM: create a new module MFCC%02d\n", mfcc->id);
    }
  }
  
  jlog("STAT: %d MFCC modules created\n", count);
}

boolean
j_launch_recognition_instance(Recog *recog, JCONF_SEARCH *sconf)
{
  RecogProcess *p;
  PROCESS_AM *am;
  PROCESS_LM *lm;

  jlog("STAT: *** composing recognizer instance SR%02d %s (AM%02d %s, LM%02d %s)\n", sconf->id, sconf->name, sconf->amconf->id, sconf->amconf->name, sconf->lmconf->id, sconf->lmconf->name);

  /* allocate recognition instance */
  p = j_recogprocess_new(recog, sconf);

  /* assign corresponding AM instance and LM instance to use */
  for(lm=recog->lmlist;lm;lm=lm->next) {
    if (sconf->lmconf == lm->config) {
      for(am=recog->amlist;am;am=am->next) {
        if (sconf->amconf == am->config) {
          p->am = am;
          p->lm = lm;
        }
      }
    }
  }
  
  if (p->config->sw.triphone_check_flag && p->am->hmminfo->is_triphone) {
    /* go into interactive triphone HMM check mode */
    hmm_check(p);
  }
  
  /******************************************/
  /******** set work area and flags *********/
  /******************************************/

  /* set flag for context dependent handling */
  if (p->config->force_ccd_handling) {
    p->ccd_flag = p->config->ccd_handling;
  } else {
    if (p->am->hmminfo->is_triphone) {
      p->ccd_flag = TRUE;
    } else {
      p->ccd_flag = FALSE;
    }
  }

  /* iwsp prepare */
  if (p->lm->config->enable_iwsp) {
    if (p->am->hmminfo->multipath) {
      /* find short-pause model */
      if (p->am->hmminfo->sp == NULL) {
        jlog("ERROR: iwsp enabled but no short pause model \"%s\" in hmmdefs\n", p->am->config->spmodel_name);
        return FALSE;
      }
      p->am->hmminfo->iwsp_penalty = p->am->config->iwsp_penalty;
    } else {
      jlog("Warning: \"-iwsp\" is supported on multi-path mode, ignored\n");
    }
  }

  /* for short-pause segmentation  */
  if (p->config->successive.enabled) {
    if (p->config->successive.pausemodelname) {
      /* pause model name string specified, divide it and store to p */
      char *s;
      int n;
      p->pass1.pausemodelnames = (char*)mymalloc(strlen(p->config->successive.pausemodelname)+1);
      strcpy(p->pass1.pausemodelnames, p->config->successive.pausemodelname);
      n = 0;
      for (s = strtok(p->pass1.pausemodelnames, " ,"); s; s = strtok(NULL, " ,")) {
        n++;
      }
      p->pass1.pausemodelnum = n;
      p->pass1.pausemodel = (char **)mymalloc(sizeof(char *) * n);
      strcpy(p->pass1.pausemodelnames, p->config->successive.pausemodelname);
      n = 0;
      for (s = strtok(p->pass1.pausemodelnames, " ,"); s; s = strtok(NULL, " ,")) {
        p->pass1.pausemodel[n++] = s;
      }
    } else {
      p->pass1.pausemodel = NULL;
    }
  }

  /* copy values of sub instances for handly access during recognition */
  /* set lm type */
  p->lmtype = p->lm->lmtype;
  p->lmvar  = p->lm->lmvar;
  p->graphout = p->config->graph.enabled;

  /**********************************************/
  /******** set model-specific defaults *********/
  /**********************************************/
  if (p->lmtype == LM_PROB) {
    /* set default lm parameter if not specified */
    if (!p->config->lmp.lmp_specified) {
      if (p->am->hmminfo->is_triphone) {
        p->config->lmp.lm_weight = DEFAULT_LM_WEIGHT_TRI_PASS1;
        p->config->lmp.lm_penalty = DEFAULT_LM_PENALTY_TRI_PASS1;
      } else {
        p->config->lmp.lm_weight = DEFAULT_LM_WEIGHT_MONO_PASS1;
        p->config->lmp.lm_penalty = DEFAULT_LM_PENALTY_MONO_PASS1;
      }
    }
    if (!p->config->lmp.lmp2_specified) {
      if (p->am->hmminfo->is_triphone) {
        p->config->lmp.lm_weight2 = DEFAULT_LM_WEIGHT_TRI_PASS2;
        p->config->lmp.lm_penalty2 = DEFAULT_LM_PENALTY_TRI_PASS2;
      } else {
        p->config->lmp.lm_weight2 = DEFAULT_LM_WEIGHT_MONO_PASS2;
        p->config->lmp.lm_penalty2 = DEFAULT_LM_PENALTY_MONO_PASS2;
      }
    }
    if (p->config->lmp.lmp_specified != p->config->lmp.lmp2_specified) {
      jlog("WARNING: m_fusion: only -lmp or -lmp2 specified, LM weights may be unbalanced\n");
    }
  }

  /****************************/
  /******* build wchmm ********/
  /****************************/
  if (p->lmtype == LM_DFA) {
    /* execute generation of global grammar and build of wchmm */
    multigram_build(p); /* some modification occured if return TRUE */
  }

  if (p->lmtype == LM_PROB) {
    /* build wchmm with N-gram */
    p->wchmm = wchmm_new();
    p->wchmm->lmtype = p->lmtype;
    p->wchmm->lmvar  = p->lmvar;
    p->wchmm->ccd_flag = p->ccd_flag;
    p->wchmm->category_tree = FALSE;
    p->wchmm->hmmwrk = &(p->am->hmmwrk);
    /* assign models */
    p->wchmm->ngram = p->lm->ngram;
    if (p->lmvar == LM_NGRAM_USER) {
      /* register LM functions for 1st pass here */
      p->wchmm->uni_prob_user = p->lm->lmfunc.uniprob;
      p->wchmm->bi_prob_user = p->lm->lmfunc.biprob;
    }
    p->wchmm->winfo = p->lm->winfo;
    p->wchmm->hmminfo = p->am->hmminfo;
    if (p->wchmm->category_tree) {
      if (p->config->pass1.old_tree_function_flag) {
        if (build_wchmm(p->wchmm, p->lm->config) == FALSE) {
          jlog("ERROR: m_fusion: error in bulding wchmm\n");
          return FALSE;
        }
      } else {
        if (build_wchmm2(p->wchmm, p->lm->config) == FALSE) {
          jlog("ERROR: m_fusion: error in bulding wchmm\n");
          return FALSE;
        }
      }
    } else {
      if (build_wchmm2(p->wchmm, p->lm->config) == FALSE) {
        jlog("ERROR: m_fusion: error in bulding wchmm\n");
        return FALSE;
      }
    }

    /* µ¯Æ°»þ -check ¤Ç¥Á¥§¥Ã¥¯¥â¡¼¥É¤Ø */
    if (p->config->sw.wchmm_check_flag) {
      wchmm_check_interactive(p->wchmm);
    }

    /* set beam width */
    /* guess beam width from models, when not specified */
    p->trellis_beam_width = set_beam_width(p->wchmm, p->config->pass1.specified_trellis_beam_width);
  }

  /* backtrellis initialization */
  p->backtrellis = (BACKTRELLIS *)mymalloc(sizeof(BACKTRELLIS));
  bt_init(p->backtrellis);

  /* initialize cache for factoring */
  if (p->lmtype == LM_PROB) {
    max_successor_cache_init(p->wchmm);
  }

  jlog("STAT: *** SR%02d %s composed\n", sconf->id, sconf->name);

  if (sconf->sw.start_inactive) {
    /* start inactive */
    p->active = -1;
  } else {
    /* book activation for the recognition */
    p->active = 1;
  }

  return TRUE;
}


boolean
j_final_fusion(Recog *recog)
{
  RecogProcess *p;
  MFCCCalc *mfcc;
  JCONF_SEARCH *sconf;
  PROCESS_AM *am;
  PROCESS_LM *lm;

  jlog("STAT: now all modules into fire for fusion...\n");
  
  if (recog->jconf->input.speech_input != SP_MFCFILE) {
    /***************************************************/
    /* create MFCC calculation instance from AM config */
    /* according to the fixated parameter information  */
    /***************************************************/
    create_mfcc_calc_instances(recog);
  }

  /****************************************/
  /* create recognition process instances */
  /****************************************/
  for(sconf=recog->jconf->search_root;sconf;sconf=sconf->next) {
    if (j_launch_recognition_instance(recog, sconf) == FALSE) return FALSE;
  }

  /****************************/
  /****** initialize GMM ******/
  /****************************/
  if (recog->gmm != NULL) {
    if (gmm_init(recog) == FALSE) {
      jlog("ERROR: m_fusion: error in initializing GMM\n");
      return FALSE;
    }
  }

  /* stage 4: setup output probability function for each AM */
  for(am=recog->amlist;am;am=am->next) {
    if (am->config->hmm_gs_filename != NULL) {/* with GMS */
      outprob_init(&(am->hmmwrk), am->hmminfo, am->hmm_gs, am->config->gs_statenum, am->config->gprune_method, am->config->mixnum_thres);
    } else {
      outprob_init(&(am->hmmwrk), am->hmminfo, NULL, 0, am->config->gprune_method, am->config->mixnum_thres);
    }
  }

  /* stage 5: initialize work area for input and realtime decoding */

  if (recog->jconf->input.speech_input == SP_MFCFILE) {
    /* create an MFCC instance for MFCC input */
    /* create new mfcc instance */
    recog->mfcclist = j_mfcccalc_new(NULL);
    recog->mfcclist->id = 1;
    /* assign to the am */
    for(am=recog->amlist;am;am=am->next) {
      am->mfcc = recog->mfcclist;
    }
    if (recog->gmm) recog->gmmmfcc = recog->mfcclist;
  }
  /* allocate parameter holders */
  for(mfcc=recog->mfcclist;mfcc;mfcc=mfcc->next) {
    mfcc->param = new_param();
  }
  
  /* initialize SS calculation work area */
  if (recog->jconf->input.speech_input != SP_MFCFILE) {
    for(mfcc=recog->mfcclist;mfcc;mfcc=mfcc->next) {
      if (mfcc->frontend.sscalc) {
        mfcc->frontend.mfccwrk_ss = WMP_work_new(mfcc->para);
        if (mfcc->frontend.mfccwrk_ss == NULL) {
          jlog("ERROR: m_fusion: failed to initialize MFCC computation for SS\n");
          return -1;
        }
      }
    }
  }

  if (recog->jconf->decodeopt.realtime_flag) {
    /* prepare for 1st pass pipeline processing */
    if (RealTimeInit(recog) == FALSE) {
      jlog("ERROR: m_fusion: failed to initialize recognition process\n");
      return FALSE;
    }
  }

  /* finished! */
  jlog("STAT: All init successfully done\n\n");

  return TRUE;
}

/* end of file */

---