SphinxBase 5prealpha
fe_warp.h
1/* ====================================================================
2 * Copyright (c) 2006 Carnegie Mellon University. All rights
3 * reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in
14 * the documentation and/or other materials provided with the
15 * distribution.
16 *
17 * This work was supported in part by funding from the Defense Advanced
18 * Research Projects Agency and the National Science Foundation of the
19 * United States of America, and the CMU Sphinx Speech Consortium.
20 *
21 * THIS SOFTWARE IS PROVIDED BY CARNEGIE MELLON UNIVERSITY ``AS IS'' AND
22 * ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
23 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY
25 * NOR ITS EMPLOYEES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 *
33 * ====================================================================
34 *
35 */
36
37#ifndef FE_WARP_H
38#define FE_WARP_H
39
40#include "fe_internal.h"
41
42#ifdef __cplusplus
43extern "C" {
44#endif
45#if 0
46/* Fool Emacs. */
47}
48#endif
49
50#define FE_WARP_ID_INVERSE_LINEAR 0
51#define FE_WARP_ID_AFFINE 1
52#define FE_WARP_ID_PIECEWISE_LINEAR 2
53#define FE_WARP_ID_EIDE_GISH 3
54#define FE_WARP_ID_MAX 2
55#define FE_WARP_ID_NONE 0xffffffff
56
57typedef struct {
58 void (*set_parameters)(char const *param_str, float sampling_rate);
59 const char * (*doc)(void);
60 uint32 (*id)(void);
61 uint32 (*n_param)(void);
62 float (*warped_to_unwarped)(float nonlinear);
63 float (*unwarped_to_warped)(float linear);
64 void (*print)(const char *label);
66
67int fe_warp_set(melfb_t *mel, const char *id_name);
68
69uint32 fe_warp_id(melfb_t *mel);
70
71const char * fe_warp_doc(melfb_t *mel);
72
73void fe_warp_set_parameters(melfb_t *mel, char const *param_str, float sampling_rate);
74
75uint32 fe_warp_n_param(melfb_t *mel);
76
77float fe_warp_warped_to_unwarped(melfb_t *mel, float nonlinear);
78
79float fe_warp_unwarped_to_warped(melfb_t *mel, float linear);
80
81void fe_warp_print(melfb_t *mel, const char *label);
82
83#define FE_WARP_NO_SIZE 0xffffffff
84
85#ifdef __cplusplus
86}
87#endif
88
89
90#endif /* FE_WARP_H */
Base Struct to hold all structure for MFCC computation.
Definition: fe_internal.h:75