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pocketsphinx-20.04
37a92a9
/* -*- c-basic-offset: 4; indent-tabs-mode: nil -*- */
/* ====================================================================
* Copyright (c) 2010 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 alignment.h
* @brief Multi-level alignment structure
*
* Because doxygen is Bad Software, the actual documentation can only
* exist in \ref ps_alignment_t. Sorry about that.
*/
#ifndef __PS_ALIGNMENT_H__
#define __PS_ALIGNMENT_H__
#include <pocketsphinx/prim_type.h>
#ifdef __cplusplus
extern "C" {
#endif
#if 0
}
#endif
/**
* Value indicating no parent or child for an entry.
* @related ps_alignment_t
*/
#define PS_ALIGNMENT_NONE -1
/**
* @struct ps_alignment_t pocketsphinx/alignment.h
* @brief Multi-level alignment (words, phones, states) over an utterance.
*/
typedef struct ps_alignment_s ps_alignment_t;
/**
* @struct ps_alignment_iter_t pocketsphinx/alignment.h
* @brief Iterator over entries in an alignment.
*/
typedef struct ps_alignment_iter_s ps_alignment_iter_t;
/**
* Retain an alighment
* @memberof ps_alignment_t
*/
POCKETSPHINX_EXPORT
ps_alignment_t *ps_alignment_retain(ps_alignment_t *al);
/**
* Release an alignment
* @memberof ps_alignment_t
*/
POCKETSPHINX_EXPORT
int ps_alignment_free(ps_alignment_t *al);
/**
* Iterate over the alignment starting at the first word.
* @memberof ps_alignment_t
*/
POCKETSPHINX_EXPORT
ps_alignment_iter_t *ps_alignment_words(ps_alignment_t *al);
/**
* Iterate over the alignment starting at the first phone.
* @memberof ps_alignment_t
*/
POCKETSPHINX_EXPORT
ps_alignment_iter_t *ps_alignment_phones(ps_alignment_t *al);
/**
* Iterate over the alignment starting at the first state.
* @memberof ps_alignment_t
*/
POCKETSPHINX_EXPORT
ps_alignment_iter_t *ps_alignment_states(ps_alignment_t *al);
/**
* Get the human-readable name of the current segment for an alignment.
*
* @memberof ps_alignment_iter_t
* @return Name of this segment as a string (word, phone, or state
* number). This pointer is owned by the iterator, do not free it
* yourself.
*/
POCKETSPHINX_EXPORT
const char *ps_alignment_iter_name(ps_alignment_iter_t *itor);
/**
* Get the timing and score information for the current segment of an aligment.
*
* @memberof ps_alignment_iter_t
* @arg start Output pointer for start frame
* @arg duration Output pointer for duration
* @return Acoustic score for this segment
*/
POCKETSPHINX_EXPORT
int ps_alignment_iter_seg(ps_alignment_iter_t *itor, int *start, int *duration);
/**
* Move an alignment iterator forward.
*
* If the end of the alignment is reached, this will free the iterator
* and return NULL.
*
* @memberof ps_alignment_iter_t
*/
POCKETSPHINX_EXPORT
ps_alignment_iter_t *ps_alignment_iter_next(ps_alignment_iter_t *itor);
/**
* Iterate over the children of the current alignment entry.
*
* If there are no child nodes, NULL is returned.
*
* @memberof ps_alignment_iter_t
*/
POCKETSPHINX_EXPORT
ps_alignment_iter_t *ps_alignment_iter_children(ps_alignment_iter_t *itor);
/**
* Release an iterator before completing all iterations.
*
* @memberof ps_alignment_iter_t
*/
POCKETSPHINX_EXPORT
int ps_alignment_iter_free(ps_alignment_iter_t *itor);
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* __PS_ALIGNMENT_H__ */