1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
|
/*
* Copyright (C) 2020 Linux Studio Plugins Project <https://lsp-plug.in/>
* (C) 2020 Vladimir Sadovnikov <sadko4u@gmail.com>
*
* This file is part of lsp-plugins
* Created on: 23 сент. 2016 г.
*
* lsp-plugins is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* any later version.
*
* lsp-plugins is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with lsp-plugins. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef LSP_PLUG_IN_DSP_UNITS_MISC_INTERPOLATION_H_
#define LSP_PLUG_IN_DSP_UNITS_MISC_INTERPOLATION_H_
#include <lsp-plug.in/dsp-units/version.h>
#include <lsp-plug.in/common/types.h>
namespace lsp
{
namespace dspu
{
namespace interpolation
{
/** Perform quadratic Hermite interpolation
*
* @param p destination (3 floats) to store the final hermite polynom
* @param x0 x-coordinate of first point used for interpolation
* @param y0 y-coordinate of first point used for interpolation
* @param k0 the tangent angle of the line at first point
* @param x1 x-coordinate of second point used for interpolation
* @param k1 the tangent angle of the line at second point
*/
LSP_DSP_UNITS_PUBLIC
void hermite_quadratic(float *p, float x0, float y0, float k0, float x1, float k1);
/** Perform cubic Hermite interpolation
*
* @param p destination (4 floats) to store the final hermite polynom
* @param x0 x-coordinate of first point used for interpolation
* @param y0 y-coordinate of first point used for interpolation
* @param k0 the tangent angle of the line at first point
* @param x1 x-coordinate of second point used for interpolation
* @param y1 y-coordinate of second point used for interpolation
* @param k1 the tangent angle of the line at second point
*/
LSP_DSP_UNITS_PUBLIC
void hermite_cubic(float *p, float x0, float y0, float k0, float x1, float y1, float k1);
/** Perform exponent interpolation
*
* @param p destination (3 floats) to store the formula: y(x) = p[0] + p[1] * exp(p[2] * x)
* @param x0 x-coordinate of first point used for interpolation
* @param y0 y-coordinate of first point used for interpolation
* @param x1 x-coordinate of second point used for interpolation
* @param y1 y-coordinate of second point used for interpolation
* @param k growing/lowering coefficient
*/
LSP_DSP_UNITS_PUBLIC
void exponent(float *p, float x0, float y0, float x1, float y1, float k);
/** Perform linear interpolation
*
* @param p destination (2 floats) to store the formula: y(x) = p[0]*x + p[1]
* @param x0 x-coordinate of first point used for interpolation
* @param y0 y-coordinate of first point used for interpolation
* @param x1 x-coordinate of second point used for interpolation
* @param y1 y-coordinate of second point used for interpolation
*/
LSP_DSP_UNITS_PUBLIC
void linear(float *p, float x0, float y0, float x1, float y1);
}
}
}
#endif /* LSP_PLUG_IN_DSP_UNITS_MISC_INTERPOLATION_H_ */
|
