/usr/include/sphinx3/astar.h is in libs3decoder-dev 0.8-0ubuntu1.
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/* ====================================================================
* Copyright (c) 2007 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,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY
* NOR ITS EMPLOYEES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* ====================================================================
*
*/
/**
* \file astar.h - Routines for A* search over DAGs.
**/
#ifndef __ASTAR_H__
#define __ASTAR_H__
#include <s3types.h>
#include "dag.h"
#include "dict.h"
#include "lm.h"
#include "fillpen.h"
#ifdef __cplusplus
extern "C" {
#endif
#if 0
/* Fool Emacs. */
}
#endif
/**
* State object for A* search (for obtaining N-best lists)
**/
typedef struct astar_s astar_t;
/**
* Initialize A* search
**/
S3DECODER_EXPORT
astar_t *astar_init(dag_t *dag, dict_t *dict, lm_t *lm,
fillpen_t *fpen,
float64 beam, /**< Pruning beam width */
float64 lwf /**< Language weight factor (usually 1.0) */
);
/**
* Clean up after A* search
**/
S3DECODER_EXPORT
void astar_free(astar_t *astar);
/**
* Get next best hypothesis from A* search
* @return a glist_t of srch_hyp_t (you are responsible for freeing this)
* or NULL if no more hypotheses are available.
**/
S3DECODER_EXPORT
glist_t astar_next_hyp(astar_t *astar);
/**
* Batch-mode function for N-best search.
* Does A* search and writes the results to the file specified.
*/
S3DECODER_EXPORT
void nbest_search(dag_t *dag, char *filename, char *uttid, float64 lwf,
dict_t *dict, lm_t *lm, fillpen_t *fpen);
#ifdef __cplusplus
}
#endif
#endif /* __ASTAR_H__ */
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