/* -*- c-basic-offset: 4; indent-tabs-mode: nil -*- */
/* ====================================================================
 * Copyright (c) 1999-2004 Carnegie Mellon University.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 2. 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.
 *
 * This work was supported in part by funding from the Defense Advanced 
 * Research Projects Agency and the National Science Foundation of the 
 * United States of America, and the CMU Sphinx Speech Consortium.
 *
 * THIS SOFTWARE IS PROVIDED BY CARNEGIE MELLON UNIVERSITY ``AS IS'' AND 
 * ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 
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 */
/*
 * fillpen.c -- Filler penalties (penalties for words that do not show up in
 * the main LM.
 * 
 * **********************************************
 * CMU ARPA Speech Project
 *
 * Copyright (c) 1996 Carnegie Mellon University.
 * ALL RIGHTS RESERVED.
 * **********************************************
 * 
 * HISTORY
 * $Log$
 * Revision 1.1  2006/04/05  20:27:30  dhdfu
 * A Great Reorganzation of header files and executables
 * 
 * Revision 1.11  2006/02/23 04:11:13  arthchan2003
 * Merged from branch SPHINX3_5_2_RCI_IRII_BRANCH: Added silprob and fillprob. Added fillpen_report.
 *
 * Revision 1.10.4.2  2005/06/28 19:09:04  arthchan2003
 * Add declaration for fillpen_report.
 *
 * Revision 1.10.4.1  2005/06/28 06:59:04  arthchan2003
 * Add silence probability and filler probability as members of fillpen_t, add reporting functions.
 *
 * Revision 1.10  2005/06/21 21:09:22  arthchan2003
 * 1, Fixed doxygen documentation. 2, Added  keyword.
 *
 * Revision 1.4  2005/06/13 04:02:58  archan
 * Fixed most doxygen-style documentation under libs3decoder.
 *
 * Revision 1.3  2005/03/30 01:22:46  archan
 * Fixed mistakes in last updates. Add
 *
 * 
 * 11-Oct-96	M K Ravishankar (rkm@cs.cmu.edu) at Carnegie Mellon University
 * 		Created.
 */


#ifndef _S3_FILLPEN_H_
#define _S3_FILLPEN_H_

#include <s3types.h>

/** \file fillpen.h
    \brief Filler penalties, penalties for words that do not show up in
    * the main LM.
    */
#ifdef __cplusplus
extern "C" {
#endif
#if 0
} /* Fool Emacs into not indenting things. */
#endif

#include "dict.h"


typedef struct {
    dict_t *dict;	/** Reference dictionary for which the filler word probabilities
			    are maintained in this structure */
    int32 *prob;	/** Filler word probability (in logs3 space, after
			    langwt and inspen application) */
    float64 lw;		/** Language weight */
    float64 wip;	/** Word insertion penalty */

    float64 silprob;      /** Probability of silence */
    float64 fillerprob;      /** Probability of filler */

#if 0
    float64 pip;
#endif
} fillpen_t;


/**
 * Initialize filler probabilities (penalties, whatever) module and return a pointer to the
 * structure created.  Filler word probabilities are simple unigram probabilities.  Here is an
 * example of such a file (one entry per line; a word and a probability):
 *   <sil>  0.10792
 *   <uh>   0.00866
 *   <um>   0.00147
 * If the first character in a line is a '#', the line is treated as a comment and ignored.
 * If no filler probabilities file is provided, the silence word gets silprob, and all other
 * filler words get fillprob.  As with the trigram LM, the resulting log-probabilities are
 * multiplied by a language weight and finally a word insertion penalty is tacked on.
 */
fillpen_t *fillpen_init (dict_t *dict,		/**< In: Dictionary containing filler words */
			 char *file,		/**< In: Filler word probabilities file, if any */
			 float64 silprob,	/**< In: Default probability for silence word */
			 float64 fillprob,	/**< In: Default probability for non-silence filler
						   words */
			 float64 lw,		/**< In: Language weight (see lm.h) */
			 float64 wip		/**< In: Word insertion penalty (see lm.h) */
    );

/**
 * Return the filler word probability for the given dictionary word-ID.
 */
int32 fillpen (fillpen_t *f,		/**< In: Filler word probabilities structure */
	       s3wid_t w		/**< In: Dictionary word-ID of filler word */
    );

/**
   Report the fillpen_t structure 
*/
void fillpen_report(fillpen_t *f        /**< In: Filler word probabilities structure */
    );

/* RAH 
   free memory allocated by fillpen_init
*/
void fillpen_free (fillpen_t *f /**< A filler penalty structure */
    );

#if 0
{ /* Stop indent from complaining */
#endif
#ifdef __cplusplus
}
#endif

#endif
