/usr/include/sphinx3/kdtree.h is in libs3decoder-dev 0.8-0ubuntu1.
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/* ====================================================================
* Copyright (c) 2005 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
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*/
/*********************************************************************
*
* File: kdtree.h
*
* Description: Cut-down kd-trees for Sphinx2 decoding
*
* Author: David Huggins-Daines <dhuggins@cs.cmu.edu>
*
*********************************************************************/
#ifndef __KDTREE_H__
#define __KDTREE_H__
#include "s3types.h"
#ifdef __cplusplus
extern "C" {
#endif
#if 0
/* Fool Emacs. */
}
#endif
typedef struct kd_tree_node_s kd_tree_node_t;
struct kd_tree_node_s {
uint8 *bbi; /* BBI list of intersecting Gaussians */
/* FIXME: Should be mfcc_t */
float32 split_plane;
uint16 n_bbi, split_comp;
uint16 left, right; /* Indices of left and right child nodes */
};
typedef struct kd_tree_s kd_tree_t;
struct kd_tree_s {
uint32 n_nodes, n_level, n_comp;
kd_tree_node_t *nodes;
};
int32 read_kd_trees(const char *infile, kd_tree_t ***out_trees, uint32 *out_n_trees,
uint32 maxdepth, int32 maxbbi);
void free_kd_tree(kd_tree_t *tree);
/* FIXME: Should be mfcc_t */
kd_tree_node_t *eval_kd_tree(kd_tree_t *tree, float32 *feat, uint32 maxdepth);
#ifdef __cplusplus
}
#endif
#endif /* __KDTREE_H__ */
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