aubio: fmat.h Source File

aubio 0.4.9

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fmat.h
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1/*
2 Copyright (C) 2009-2015 Paul Brossier <piem@aubio.org>
3
4 This file is part of aubio.
5
6 aubio is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
10
11 aubio is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with aubio. If not, see <http://www.gnu.org/licenses/>.
18
19*/
20
21#ifndef AUBIO_FMAT_H
22#define AUBIO_FMAT_H
23
24#ifdef __cplusplus
25extern "C" {
26#endif
27
28/** \file
29
30 Matrix of real valued data
31
32 This file specifies the fmat_t type, which is used in aubio to store arrays
33 of floating point values.
34
35 \example test-fmat.c
36
37*/
38
39/** Buffer for real data */
40 typedef struct {
41 uint_t length; /**< length of matrix */
42 uint_t height; /**< height of matrix */
43 smpl_t **data; /**< data array of size [length] * [height] */
44} fmat_t;
45
46/** fmat_t buffer creation function
47
48 \param length the length of the matrix to create
49 \param height the height of the matrix to create
50
51*/
52 fmat_t * new_fmat(uint_t height, uint_t length);
53
54/** fmat_t buffer deletion function
55
56 \param s buffer to delete as returned by new_fmat()
57
58*/
59 void del_fmat(fmat_t *s);
60
61/** read sample value in a buffer
62
63 \param s vector to read from
64 \param channel channel to read from
65 \param position sample position to read from
66
67*/
68 smpl_t fmat_get_sample(const fmat_t *s, uint_t channel, uint_t position);
69
70/** write sample value in a buffer
71
72 \param s vector to write to
73 \param data value to write in s->data[channel][position]
74 \param channel channel to write to
75 \param position sample position to write to
76
77*/
78 void fmat_set_sample(fmat_t *s, smpl_t data, uint_t channel, uint_t position);
79
80/** read channel vector from a buffer
81
82 \param s vector to read from
83 \param channel channel to read from
84 \param output ::fvec_t to output to
85
86*/
87 void fmat_get_channel (const fmat_t *s, uint_t channel, fvec_t *output);
88
89/** get vector buffer from an fmat data
90
91 \param s vector to read from
92 \param channel channel to read from
93
94*/
95 smpl_t * fmat_get_channel_data (const fmat_t *s, uint_t channel);
96
97/** read data from a buffer
98
99 \param s vector to read from
100
101*/
102 smpl_t ** fmat_get_data(const fmat_t *s);
103
104/** print out fmat data
105
106 \param s vector to print out
107
108*/
109 void fmat_print(const fmat_t *s);
110
111/** set all elements to a given value
112
113 \param s vector to modify
114 \param val value to set elements to
115
116*/
117 void fmat_set(fmat_t *s, smpl_t val);
118
119/** set all elements to zero
120
121 \param s vector to modify
122
123*/
124 void fmat_zeros(fmat_t *s);
125
126/** set all elements to ones
127
128 \param s vector to modify
129
130*/
131 void fmat_ones(fmat_t *s);
132
133/** revert order of vector elements
134
135 \param s vector to revert
136
137*/
138 void fmat_rev(fmat_t *s);
139
140/** apply weight to vector
141
142 If the weight vector is longer than s, only the first elements are used. If
143 the weight vector is shorter than s, the last elements of s are not weighted.
144
145 \param s vector to weight
146 \param weight weighting coefficients
147
148*/
149 void fmat_weight(fmat_t *s, const fmat_t *weight);
150
151/** make a copy of a matrix
152
153 \param s source vector
154 \param t vector to copy to
155
156*/
157 void fmat_copy(const fmat_t *s, fmat_t *t);
158
159/** compute the product of a matrix by a vector
160
161 \param s matrix to compute product with
162 \param scale vector to compute product with
163 \param output vector to store restults in
164
165*/
166 void fmat_vecmul(const fmat_t *s, const fvec_t *scale, fvec_t *output);
167
168#ifdef __cplusplus
169}
170#endif
171
172#endif /* AUBIO_FMAT_H */
fmat_get_channel_data
smpl_t * fmat_get_channel_data(const fmat_t *s, uint_t channel)
get vector buffer from an fmat data
fmat_zeros
void fmat_zeros(fmat_t *s)
set all elements to zero
fmat_print
void fmat_print(const fmat_t *s)
print out fmat data
del_fmat
void del_fmat(fmat_t *s)
fmat_t buffer deletion function
fmat_weight
void fmat_weight(fmat_t *s, const fmat_t *weight)
apply weight to vector
fmat_copy
void fmat_copy(const fmat_t *s, fmat_t *t)
make a copy of a matrix
fmat_rev
void fmat_rev(fmat_t *s)
revert order of vector elements
fmat_set_sample
void fmat_set_sample(fmat_t *s, smpl_t data, uint_t channel, uint_t position)
write sample value in a buffer
fmat_get_data
smpl_t ** fmat_get_data(const fmat_t *s)
read data from a buffer
fmat_ones
void fmat_ones(fmat_t *s)
set all elements to ones
fmat_vecmul
void fmat_vecmul(const fmat_t *s, const fvec_t *scale, fvec_t *output)
compute the product of a matrix by a vector
fmat_set
void fmat_set(fmat_t *s, smpl_t val)
set all elements to a given value
fmat_get_channel
void fmat_get_channel(const fmat_t *s, uint_t channel, fvec_t *output)
read channel vector from a buffer
new_fmat
fmat_t * new_fmat(uint_t height, uint_t length)
fmat_t buffer creation function
fmat_get_sample
smpl_t fmat_get_sample(const fmat_t *s, uint_t channel, uint_t position)
read sample value in a buffer
fmat_t
Buffer for real data.
Definition fmat.h:40
fmat_t::data
smpl_t ** data
data array of size [length] * [height]
Definition fmat.h:43
fmat_t::length
uint_t length
length of matrix
Definition fmat.h:41
fmat_t::height
uint_t height
height of matrix
Definition fmat.h:42
fvec_t
Buffer for real data.
Definition fvec.h:67
uint_t
unsigned int uint_t
unsigned integer
Definition types.h:60
smpl_t
float smpl_t
short sample format (32 or 64 bits)
Definition types.h:41