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
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
|
/*
* Copyright (C) 2021 Linux Studio Plugins Project <https://lsp-plug.in/>
* (C) 2021 Stefano Tronci <stefano.tronci@protonmail.com>
*
* This file is part of lsp-dsp-units
* Created on: 31 May 2021
*
* 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_NOISE_GENERATOR_H_
#define LSP_PLUG_IN_DSP_UNITS_NOISE_GENERATOR_H_
#include <lsp-plug.in/dsp-units/filters/SpectralTilt.h>
#include <lsp-plug.in/dsp-units/iface/IStateDumper.h>
#include <lsp-plug.in/dsp-units/noise/LCG.h>
#include <lsp-plug.in/dsp-units/noise/MLS.h>
#include <lsp-plug.in/dsp-units/noise/Velvet.h>
namespace lsp
{
namespace dspu
{
enum ng_generator_t
{
NG_GEN_MLS,
NG_GEN_LCG,
NG_GEN_VELVET,
NG_GEN_MAX
};
enum ng_color_t
{
NG_COLOR_WHITE,
NG_COLOR_PINK,
NG_COLOR_RED,
NG_COLOR_BLUE,
NG_COLOR_VIOLET,
NG_COLOR_ARBITRARY,
NG_COLOR_MAX,
NG_COLOR_BROWN = NG_COLOR_RED,
NG_COLOR_BROWNIAN = NG_COLOR_RED
};
class LSP_DSP_UNITS_PUBLIC NoiseGenerator
{
private:
NoiseGenerator & operator = (const NoiseGenerator &);
NoiseGenerator(const NoiseGenerator &);
protected:
enum update_t
{
UPD_MLS = 1 << 0,
UPD_LCG = 1 << 1,
UPD_VELVET = 1 << 2,
UPD_COLOR = 1 << 3,
UPD_OTHER = 1 << 4,
UPD_ALL = UPD_MLS | UPD_LCG | UPD_VELVET | UPD_COLOR | UPD_OTHER
};
typedef struct mls_params_t
{
uint8_t nBits;
MLS::mls_t nSeed;
} mls_params_t;
typedef struct lcg_params_t
{
uint32_t nSeed;
lcg_dist_t enDistribution;
} lcg_params_t;
typedef struct velvet_params_t
{
uint32_t nRandSeed;
uint8_t nMLSnBits;
MLS::mls_t nMLSseed;
vn_core_t enCore;
vn_velvet_type_t enVelvetType;
float fWindowWidth_s;
float fARNdelta;
bool bCrush;
float fCrushProb;
} velvet_params_t;
typedef struct color_params_t
{
ng_color_t enColor;
size_t nOrder;
float fSlope;
stlt_slope_unit_t enSlopeUnit;
} color_params_t;
private:
MLS sMLS;
LCG sLCG;
Velvet sVelvetNoise;
SpectralTilt sColorFilter;
mls_params_t sMLSParams;
lcg_params_t sLCGParams;
velvet_params_t sVelvetParams;
color_params_t sColorParams;
size_t nSampleRate;
ng_generator_t enGenerator;
float fAmplitude;
float fOffset;
size_t nUpdate;
public:
explicit NoiseGenerator();
~NoiseGenerator();
void construct();
void destroy();
protected:
void do_process(float *dst, size_t count);
void update_settings();
public:
/** Initialize random generator.
*
* @param rand_seed seed for the Randomizer generator.
* @param lcg_seed seed for the LCG generator.
*/
void init(
uint8_t mls_n_bits, MLS::mls_t mls_seed,
uint32_t lcg_seed,
uint32_t velvet_rand_seed, uint8_t velvet_mls_n_bits, MLS::mls_t velvet_mls_seed);
/** Initialize random generator, automatic.
*/
void init();
/** Set sample rate
*
* @param sr sample rate
*/
void set_sample_rate(size_t sr);
/** Set the number of bits of the MLS sequence generator.
*
* @param nbits number of bits.
*/
void set_mls_n_bits(uint8_t nbits);
/** Set MLS generator seed.
*
* @param seed MLS seed.
*/
void set_mls_seed(MLS::mls_t seed);
/** Set LCG distribution.
*
* @param dist LCG distribution.
*/
void set_lcg_distribution(lcg_dist_t dist);
/** Set the lcg_dist_telvet noise type. Velvet noise is emitted only if Sparsity is Velvet.
*
* @param type velvet type.
*/
void set_velvet_type(vn_velvet_type_t type);
/** Set the Velvet noise window width in samples. Velvet noise is emitted only if Sparsity is Velvet.
*
* @param width velvet noise width.
*/
void set_velvet_window_width(float width);
/** Set delta parameter for Velvet ARN noise.
*
* @param delta value.
*/
void set_velvet_arn_delta(float delta);
/** Set whether to crush the velvet generator.
*
* @param true to crash.
*/
void set_velvet_crush(bool crush);
/** Set the crushing probability for the velvet generator.
*
* @param crushing probability.
*/
void set_velvet_crushing_probability(float prob);
/** Set which core generator to use.
*
* @param core core generator specification.
*/
void set_generator(ng_generator_t core);
/** Set the noise color.
*
* @param noise color specification.
*/
void set_noise_color(ng_color_t color);
/** Set the coloring filter order.
*
* @param order order.
*/
void set_coloring_order(size_t order);
/** Set the color slope.
*
* @param slope slope.
* çparam unit slope unit
*/
void set_color_slope(float slope, stlt_slope_unit_t unit);
/** Set the noise amplitude.
*
* @param amplitude noise amplitude.
*/
void set_amplitude(float amplitude);
/** Set the noise offset.
*
* @param offset noise offset.
*/
void set_offset(float offset);
/** Output noise to the destination buffer in additive mode
*
* @param dst output wave destination
* @param src input source, allowed to be NULL
* @param count number of samples to synthesise
*/
void process_add(float *dst, const float *src, size_t count);
/** Output noise to the destination buffer in multiplicative mode
*
* @param dst output wave destination
* @param src input source, allowed to be NULL
* @param count number of samples to process
*/
void process_mul(float *dst, const float *src, size_t count);
/** Output noise to a destination buffer overwriting its content
*
* @param dst output wave destination
* @param src input source, allowed to be NULLL
* @param count number of samples to process
*/
void process_overwrite(float *dst, size_t count);
/**
* Get frequency chart of the colouring filter
* @param re real part of the frequency chart
* @param im imaginary part of the frequency chart
* @param f frequencies to calculate value
* @param count number of dots for the chart
*/
void freq_chart(float *re, float *im, const float *f, size_t count);
/**
* Get frequency chart of the whole equalizer
* @param c complex numbers that contain the filter transfer function
* @param f frequencies to calculate filter transfer function
* @param count number of points
*/
void freq_chart(float *c, const float *f, size_t count);
/**
* Dump the state
* @param dumper dumper
*/
void dump(IStateDumper *v) const;
};
}
}
#endif /* LSP_PLUG_IN_DSP_UNITS_NOISE_GENERATOR_H_ */
|
