ngram_read_bin.c

julius version 4.12.about sound recognition.

      rdn(fp, t->bo_wt, sizeof(LOGPROB), t->context_num);
    } else {
      t->bo_wt = NULL;
    }
    rdn(fp, &i, sizeof(int), 1);
    if (i == 1) {
      t->nnid2ctid_upper = (NNID_UPPER *)mymalloc_big(sizeof(NNID_UPPER), t->totalnum);
      t->nnid2ctid_lower = (NNID_LOWER *)mymalloc_big(sizeof(NNID_LOWER), t->totalnum);
      rdn(fp, t->nnid2ctid_upper, sizeof(NNID_UPPER), t->totalnum);
      rdn(fp, t->nnid2ctid_lower, sizeof(NNID_LOWER), t->totalnum);
    } else {
      t->nnid2ctid_upper = NULL;
      t->nnid2ctid_lower = NULL;
    }
  }
  rdn(fp, &i, sizeof(int), 1);
  if (i == 1) {
    ndata->bo_wt_1 = (LOGPROB *)mymalloc_big(sizeof(LOGPROB), ndata->d[0].context_num);
    rdn(fp, ndata->bo_wt_1, sizeof(LOGPROB), ndata->d[0].context_num);
  } else {
    ndata->bo_wt_1 = NULL;
  }
  rdn(fp, &i, sizeof(int), 1);
  if (i == 1) {
    ndata->p_2 = (LOGPROB *)mymalloc_big(sizeof(LOGPROB), ndata->d[1].totalnum);
    rdn(fp, ndata->p_2, sizeof(LOGPROB), ndata->d[1].totalnum);
  } else {
    ndata->p_2 = NULL;
  }

  return TRUE;
}

static boolean
ngram_read_bin_compat(FILE *fp, NGRAM_INFO *ndata, int *retry_ret)
{
  int i,n,len;
  char *w, *p;
  NNID *n3_bgn;
  NNID d, ntmp;
#ifdef WORDS_INT
  unsigned short *buf;
#endif
  NGRAM_TUPLE_INFO *t, *tt, *ttt;

  /* old binary N-gram assumes these types */
  ndata->bigram_index_reversed = TRUE;
  ndata->n = 3;
  ndata->dir = DIR_RL;

  /* read total info and set max_word_num */
  for(n=0;n<ndata->n;n++) {
    rdn(fp, &(ndata->d[n].totalnum), sizeof(NNID), 1);
  }
  ndata->max_word_num = ndata->d[0].totalnum;

  if (file_version == 4) {
    rdn(fp, &(ndata->d[1].context_num), sizeof(NNID), 1);
  }

  for(n=0;n<ndata->n;n++) {
    if (n < 2) {
      ndata->d[n].is24bit = FALSE;
    } else {
      if (ndata->d[n].totalnum >= NNID_MAX_24) {
	jlog("Warning: ngram_read_bin_compat: num of %d-gram exceeds 24bit, now switch to %dbit index\n", n+1, sizeof(NNID) * 8);
	ndata->d[n].is24bit = FALSE;
      } else {
	ndata->d[n].is24bit = TRUE;
      }
    }
    ndata->d[n].nnid2ctid_upper = NULL;
    ndata->d[n].nnid2ctid_lower = NULL;
  }
  /* always do back-off compaction for 3-gram and up */
  /* mark 2-gram and up */
  ndata->d[0].ct_compaction = FALSE;
  for(n=1;n<ndata->n;n++) {
    ndata->d[n].ct_compaction = TRUE;
  }

  /* read wname */
  rdn(fp, &len, sizeof(int), 1);
  w = mymalloc(len);
  rdn(fp, w, 1, len);
  /* assign... */
  ndata->wname = (char **)mymalloc(sizeof(char *) * ndata->max_word_num);
  p = w; i = 0;
  while (p < w + len) {
    ndata->wname[i++] = p;
    while(*p != '\0') p++;
    p++;
  }
  if (i != ndata->max_word_num) {
    jlog("Error: ngram_read_bin_compat: wname error??\n");
    return FALSE;
  }

  /* malloc 1-gram */
  t = &(ndata->d[0]);
  tt = &(ndata->d[1]);
  ttt = &(ndata->d[2]);

  t->bgn_upper = NULL;
  t->bgn_lower = NULL;
  t->bgn = NULL;
  t->num = NULL;
  t->bgnlistlen = 0;
  t->nnid2wid = NULL;
  t->nnid2ctid_upper = NULL;
  t->nnid2ctid_lower = NULL;

  t->context_num = t->totalnum;
  t->prob = (LOGPROB *)mymalloc_big(sizeof(LOGPROB), t->totalnum);
  ndata->bo_wt_1 = (LOGPROB *)mymalloc_big(sizeof(LOGPROB), t->context_num);
  t->bo_wt = (LOGPROB *)mymalloc_big(sizeof(LOGPROB), t->context_num);
  tt->bgnlistlen = t->context_num;
  tt->bgn = (NNID *)mymalloc_big(sizeof(NNID), tt->bgnlistlen);
  tt->num = (WORD_ID *)mymalloc_big(sizeof(WORD_ID), tt->bgnlistlen);

  /* read 1-gram */
  jlog("stat: ngram_read_bin_compat: reading 1-gram\n");
  rdn(fp, t->prob, sizeof(LOGPROB), t->totalnum);
  rdn(fp, ndata->bo_wt_1, sizeof(LOGPROB), t->context_num);
  rdn(fp, t->bo_wt, sizeof(LOGPROB), t->context_num);
  rdn(fp, tt->bgn, sizeof(NNID), tt->bgnlistlen);
#ifdef WORDS_INT
  rdn_wordid(fp, tt->num, tt->bgnlistlen, need_conv);
#else
  rdn(fp, tt->num, sizeof(WORD_ID), tt->bgnlistlen);
#endif

#ifdef WORDS_INT
  {
    /* check if we are wrongly reading word_id=2byte bingram
       (if bingram version >= 4, this should not be happen because
        header correctly tells the word_id byte size.  This will 
	occur only if matches all the conditions below:
	- you run Julius with --enable-words-int,
	- you use old bingram of version <= 3, and
	- you use bingram file converted without --enable-words-int
     */
    WORD_ID w;
    for(w=0;w<ndata->max_word_num;w++) {
      if (ndata->d[1].num[w] > ndata->max_word_num) {
	if (words_int_retry) {
	  jlog("Error: ngram_read_bin_compat: retry failed, wrong bingram format\n");
	  return FALSE;
	}
	jlog("Warning: ngram_read_bin_compat: incorrect data, may be a 2-byte v3 bingram, retry with conversion\n");
	free(ndata->wname[0]);
	free(ndata->wname);
	free(t->prob);
	free(ndata->bo_wt_1);
	free(t->bo_wt);
	free(tt->bgn);
	free(tt->num);
	myfrewind(fp);
	words_int_retry = TRUE;
	*retry_ret = 1;
	return FALSE;
      }
    }
  }
#endif

  /* malloc the rest */
  tt->nnid2wid = (WORD_ID *)mymalloc_big(sizeof(WORD_ID), tt->totalnum);
  tt->prob = (LOGPROB *)mymalloc_big(sizeof(LOGPROB), tt->totalnum);
  ndata->p_2 = (LOGPROB *)mymalloc_big(sizeof(LOGPROB), tt->totalnum);
  if (file_version == 4) {	/* context compaction and 24bit */
    tt->nnid2ctid_upper = (NNID_UPPER *)mymalloc_big(sizeof(NNID_UPPER), tt->totalnum);
    tt->nnid2ctid_lower = (NNID_LOWER *)mymalloc_big(sizeof(NNID_LOWER), tt->totalnum);
    tt->bo_wt = (LOGPROB *)mymalloc_big(sizeof(LOGPROB), tt->context_num);
    ttt->bgnlistlen = tt->context_num;
    ttt->bgn_upper = (NNID_UPPER *)mymalloc_big(sizeof(NNID_UPPER), ttt->bgnlistlen);
    ttt->bgn_lower = (NNID_LOWER *)mymalloc_big(sizeof(NNID_LOWER), ttt->bgnlistlen);
    ttt->num = (WORD_ID *)mymalloc_big(sizeof(WORD_ID), ttt->bgnlistlen);
  } else {
    tt->context_num = tt->totalnum;
    tt->bo_wt = (LOGPROB *)mymalloc_big(sizeof(LOGPROB), tt->context_num);
    ttt->bgnlistlen = tt->context_num;
    ttt->num = (WORD_ID *)mymalloc_big(sizeof(WORD_ID), ttt->bgnlistlen);
    if (ttt->is24bit) {
      ttt->bgn_upper = (NNID_UPPER *)mymalloc_big(sizeof(NNID_UPPER), ttt->bgnlistlen);
      ttt->bgn_lower = (NNID_LOWER *)mymalloc_big(sizeof(NNID_LOWER), ttt->bgnlistlen);
      n3_bgn = (NNID *)mymalloc_big(sizeof(NNID), ttt->bgnlistlen);
    } else {
      ttt->bgn = (NNID *)mymalloc_big(sizeof(NNID), ttt->bgnlistlen);
    }
  }
      
  ttt->nnid2wid = (WORD_ID *)mymalloc_big(sizeof(WORD_ID), ttt->totalnum);
  ttt->prob = (LOGPROB *)mymalloc_big(sizeof(LOGPROB), ttt->totalnum);
  ttt->bo_wt = NULL;
  
  /* read 2-gram*/
  jlog("Stat: ngram_read_bin_compat: reading 2-gram\n");
#ifdef WORDS_INT
  rdn_wordid(fp, tt->nnid2wid, tt->totalnum, need_conv);
#else
  rdn(fp, tt->nnid2wid, sizeof(WORD_ID), tt->totalnum);
#endif
  rdn(fp, ndata->p_2, sizeof(LOGPROB), tt->totalnum);
  rdn(fp, tt->prob, sizeof(LOGPROB), tt->totalnum);
  if (file_version == 4) {
    rdn(fp, tt->nnid2ctid_upper, sizeof(NNID_UPPER), tt->totalnum);
    rdn(fp, tt->nnid2ctid_lower, sizeof(NNID_LOWER), tt->totalnum);
    rdn(fp, tt->bo_wt, sizeof(LOGPROB), tt->context_num);
    rdn(fp, ttt->bgn_upper, sizeof(NNID_UPPER), ttt->bgnlistlen);
    rdn(fp, ttt->bgn_lower, sizeof(NNID_LOWER), ttt->bgnlistlen);
#ifdef WORDS_INT
    rdn_wordid(fp, ttt->num, ttt->bgnlistlen, need_conv);
#else
    rdn(fp, ttt->num, sizeof(WORD_ID), ttt->bgnlistlen);
#endif
  } else {
    rdn(fp, tt->bo_wt, sizeof(LOGPROB), tt->context_num);
    if (ttt->is24bit) {
      rdn(fp, n3_bgn, sizeof(NNID), ttt->bgnlistlen);
      for(d=0;d<ttt->bgnlistlen;d++) {
	if (n3_bgn[d] == NNID_INVALID) {
	  ttt->bgn_lower[d] = 0;
	  ttt->bgn_upper[d] = NNID_INVALID_UPPER;
	} else {
	  ntmp = n3_bgn[d] & 0xffff;
	  ttt->bgn_lower[d] = ntmp;
	  ntmp = n3_bgn[d] >> 16;
	  ttt->bgn_upper[d] = ntmp;
	}
      }
    } else {
      rdn(fp, ttt->bgn, sizeof(NNID), ttt->bgnlistlen);
    }
#ifdef WORDS_INT
    rdn_wordid(fp, ttt->num, ttt->bgnlistlen, need_conv);
#else
    rdn(fp, ttt->num, sizeof(WORD_ID), ttt->bgnlistlen);
#endif
  }

  /* read 3-gram*/
  jlog("Stat: ngram_read_bin_compat: reading 3-gram\n");
#ifdef WORDS_INT
  rdn_wordid(fp, ttt->nnid2wid, ttt->totalnum, need_conv);
#else
  rdn(fp, ttt->nnid2wid, sizeof(WORD_ID), ttt->totalnum);
#endif
  rdn(fp, ttt->prob, sizeof(LOGPROB), ttt->totalnum);

  /* compact the 2-gram back-off and 3-gram links */
  if (file_version != 4) {
    if (ttt->is24bit) {
      free(n3_bgn);
      if (ngram_compact_context(ndata, 2) == FALSE) return FALSE;
    }
  }
  
  return TRUE;
}


/** 
 * Read a N-gram binary file and store to data.
 * 
 * @param fp [in] file pointer
 * @param ndata [out] N-gram data to store the read data
 * 
 * @return TRUE on success, FALSE on failure.
 */
boolean
ngram_read_bin(FILE *fp, NGRAM_INFO *ndata)
{
  int retry;

#ifdef WORDS_INT
  /* reset retry flag */
  words_int_retry = FALSE;
  /* when retrying, it restarts from here with words_int_retry = TRUE */
 ngram_read_bin_start:
#endif
  
  ndata->from_bin = TRUE;

  /* check initial header */
  if (check_header(fp) == FALSE) return FALSE;
  
#ifdef WORDS_INT
  /* in retry mode, force word_id conversion  */
  if (words_int_retry) need_conv = TRUE;
#endif
  
#ifdef WORDS_INT
  if (need_conv) jlog("Stat: ngram_read_bin: word-id size conversion enabled\n");
#endif

  if (file_version <= 4) {
    retry = 0;
    if (ngram_read_bin_compat(fp, ndata, &retry) == FALSE) {
#ifdef WORDS_INT
      if (retry == 1) {
	goto ngram_read_bin_start;
      } else {
	return FALSE;
      }
#else
      return FALSE;
#endif
    }
  } else {
    if (ngram_read_bin_v5(fp, ndata) == FALSE) return FALSE;
  }


  /* make word search tree for later lookup */
  jlog("Stat: ngram_read_bin: making entry name index\n");
  ngram_make_lookup_tree(ndata);

  bi_prob_func_set(ndata);

  return TRUE;
}