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
|
<?xml version="1.0"?>
<!DOCTYPE ladspa SYSTEM "ladspa-swh.dtd">
<?xml-stylesheet href="ladspa.css" type="text/css"?>
<ladspa>
<global>
<meta name="maker" value="Steve Harris <steve@plugin.org.uk>"/>
<meta name="copyright" value="GPL"/>
<meta name="properties" value="HARD_RT_CAPABLE"/>
<code><![CDATA[
#include <stdlib.h>
#include <limits.h>
#include "ladspa-util.h"
#include "util/biquad.h"
#define BUF_LEN 0.1
#define CLICK_BUF_SIZE 4096
#define df(x) ((sinf(x) + 1.0f) * 0.5f)
inline static float noise();
inline static float noise()
{
static unsigned int randSeed = 23;
randSeed = (randSeed * 196314165) + 907633515;
return randSeed / (float)INT_MAX - 1.0f;
}
]]></code>
</global>
<plugin label="vynil" id="1905" class="DistortionPlugin">
<name>VyNil (Vinyl Effect)</name>
<callback event="instantiate"><![CDATA[
unsigned int i;
unsigned int buffer_size;
fs = (float)s_rate;
buffer_size = 4096;
while (buffer_size < s_rate * BUF_LEN) {
buffer_size *= 2;
}
buffer_m = malloc(sizeof(LADSPA_Data) * buffer_size);
buffer_s = malloc(sizeof(LADSPA_Data) * buffer_size);
buffer_mask = buffer_size - 1;
buffer_pos = 0;
click_gain = 0;
phi = 0.0f; /* Angular phase */
click_buffer = malloc(sizeof(LADSPA_Data) * CLICK_BUF_SIZE);
for (i=0; i<CLICK_BUF_SIZE; i++) {
if (i<CLICK_BUF_SIZE / 2) {
click_buffer[i] = (double)i / (double)(CLICK_BUF_SIZE / 2);
click_buffer[i] *= click_buffer[i];
click_buffer[i] *= click_buffer[i];
click_buffer[i] *= click_buffer[i];
} else {
click_buffer[i] = click_buffer[CLICK_BUF_SIZE - i];
}
}
sample_cnt = 0;
def = 0.0f;
def_target = 0.0f;
lowp_m = calloc(sizeof(biquad), 1);
lowp_s = calloc(sizeof(biquad), 1);
highp = calloc(sizeof(biquad), 1);
noise_filt = calloc(sizeof(biquad), 1);
]]></callback>
<callback event="activate"><![CDATA[
memset(buffer_m, 0, sizeof(LADSPA_Data) * (buffer_mask + 1));
memset(buffer_s, 0, sizeof(LADSPA_Data) * (buffer_mask + 1));
plugin_data->buffer_pos = 0;
plugin_data->click_buffer_pos.all = 0;
plugin_data->click_buffer_omega.all = 0;
plugin_data->click_gain = 0;
plugin_data->phi = 0.0f;
lp_set_params(lowp_m, 16000.0, 0.5, fs);
lp_set_params(lowp_s, 16000.0, 0.5, fs);
lp_set_params(highp, 10.0, 0.5, fs);
lp_set_params(noise_filt, 1000.0, 0.5, fs);
]]></callback>
<callback event="run"><![CDATA[
unsigned long pos;
float deflec = def;
float deflec_target = def_target;
float src_m, src_s;
/* angular velocity of platter * 16 */
const float omega = 960.0f / (rpm * fs);
const float age = (2000 - year) * 0.01f;
const unsigned int click_prob = (age*age*(float)RAND_MAX)/10 + click * 0.02 * RAND_MAX;
const float noise_amp = (click + wear * 0.3f) * 0.12f + (1993.0f - year) * 0.0031f;
const float bandwidth = (year - 1880.0f) * (rpm * 1.9f);
const float noise_bandwidth = bandwidth * (0.25 - wear * 0.02) + click * 200.0 + 300.0;
const float stereo = f_clamp((year - 1940.0f) * 0.02f, 0.0f, 1.0f);
const float wrap_gain = age * 3.1f + 0.05f;
const float wrap_bias = age * 0.1f;
lp_set_params(lowp_m, bandwidth * (1.0 - wear * 0.86), 2.0, fs);
lp_set_params(lowp_s, bandwidth * (1.0 - wear * 0.89), 2.0, fs);
hp_set_params(highp, (2000-year) * 8.0, 1.5, fs);
lp_set_params(noise_filt, noise_bandwidth, 4.0 + wear * 2.0, fs);
for (pos = 0; pos < sample_count; pos++) {
unsigned int o1, o2;
float ofs;
if ((sample_cnt & 15) == 0) {
const float ang = phi * 2.0f * M_PI;
const float w = warp * (2000.0f - year) * 0.01f;
deflec_target = w*df(ang)*0.5f + w*w*df(2.0f*ang)*0.31f +
w*w*w*df(3.0f*ang)*0.129f;
phi += omega;
while (phi > 1.0f) {
phi -= 1.0f;
}
if ((unsigned int)rand() < click_prob) {
click_buffer_omega.all = ((rand() >> 6) + 1000) * rpm;
click_gain = noise_amp * 5.0f * noise();
}
}
deflec = deflec * 0.1f + deflec_target * 0.9f;
/* matrix into mid_side representation (this is roughly what stereo
* LPs do) */
buffer_m[buffer_pos] = in_l[pos] + in_r[pos];
buffer_s[buffer_pos] = in_l[pos] - in_r[pos];
/* cacluate the effects of the surface warping */
ofs = fs * 0.009f * deflec;
o1 = f_round(floorf(ofs));
o2 = f_round(ceilf(ofs));
ofs -= o1;
src_m = LIN_INTERP(ofs, buffer_m[(buffer_pos - o1 - 1) & buffer_mask], buffer_m[(buffer_pos - o2 - 1) & buffer_mask]);
src_s = LIN_INTERP(ofs, buffer_s[(buffer_pos - o1 - 1) & buffer_mask], buffer_s[(buffer_pos - o2 - 1) & buffer_mask]);
src_m = biquad_run(lowp_m, src_m + click_buffer[click_buffer_pos.part.in & (CLICK_BUF_SIZE - 1)] * click_gain);
/* waveshaper */
src_m = LIN_INTERP(age, src_m, sinf(src_m * wrap_gain + wrap_bias));
/* output highpass */
src_m = biquad_run(highp, src_m) + biquad_run(noise_filt, noise()) * noise_amp + click_buffer[click_buffer_pos.part.in & (CLICK_BUF_SIZE - 1)] * click_gain * 0.5f;
/* stereo seperation filter */
src_s = biquad_run(lowp_s, src_s) * stereo;
buffer_write(out_l[pos], (src_s + src_m) * 0.5f);
buffer_write(out_r[pos], (src_m - src_s) * 0.5f);
/* roll buffer indexes */
buffer_pos = (buffer_pos + 1) & buffer_mask;
click_buffer_pos.all += click_buffer_omega.all;
if (click_buffer_pos.part.in >= CLICK_BUF_SIZE) {
click_buffer_pos.all = 0;
click_buffer_omega.all = 0;
}
sample_cnt++;
}
plugin_data->buffer_pos = buffer_pos;
plugin_data->click_buffer_pos = click_buffer_pos;
plugin_data->click_buffer_omega = click_buffer_omega;
plugin_data->click_gain = click_gain;
plugin_data->sample_cnt = sample_cnt;
plugin_data->def_target = deflec_target;
plugin_data->def = deflec;
plugin_data->phi = phi;
]]></callback>
<callback event="cleanup"><![CDATA[
free(plugin_data->buffer_m);
free(plugin_data->buffer_s);
free(plugin_data->click_buffer);
free(plugin_data->lowp_m);
free(plugin_data->lowp_s);
free(plugin_data->noise_filt);
]]></callback>
<port label="year" dir="input" type="control" hint="default_maximum">
<name>Year</name>
<p>The date of the recording/playback equipment to be simulated.</p>
<range min="1900" max="1990"/>
</port>
<port label="rpm" dir="input" type="control" hint="default_minimum">
<name>RPM</name>
<p>The rotational speed of the platter.</p>
<range min="33" max="78"/>
</port>
<port label="warp" dir="input" type="control" hint="default_0">
<name>Surface warping</name>
<p>The degree of variation in height of the record surface.</p>
<range min="0.0" max="1.0"/>
</port>
<port label="click" dir="input" type="control" hint="default_0">
<name>Crackle</name>
<p>The number of scratches on the record surface.</p>
<range min="0.0" max="1.0"/>
</port>
<port label="wear" dir="input" type="control" hint="default_0">
<name>Wear</name>
<p>The ammount of wear on the grooves.</p>
<range min="0.0" max="1.0"/>
</port>
<port label="in_l" dir="input" type="audio">
<name>Input L</name>
</port>
<port label="in_r" dir="input" type="audio">
<name>Input R</name>
</port>
<port label="out_l" dir="output" type="audio">
<name>Output L</name>
</port>
<port label="out_r" dir="output" type="audio">
<name>Output R</name>
</port>
<instance-data label="fs" type="float" />
<instance-data label="buffer_m" type="LADSPA_Data *" />
<instance-data label="buffer_s" type="LADSPA_Data *" />
<instance-data label="buffer_mask" type="unsigned int" />
<instance-data label="buffer_pos" type="unsigned int" />
<instance-data label="click_buffer" type="LADSPA_Data *" />
<instance-data label="click_buffer_pos" type="fixp16" />
<instance-data label="click_buffer_omega" type="fixp16" />
<instance-data label="click_gain" type="float" />
<instance-data label="phi" type="float" />
<instance-data label="sample_cnt" type="unsigned int" />
<instance-data label="def" type="float" />
<instance-data label="def_target" type="float" />
<instance-data label="lowp_m" type="biquad *" />
<instance-data label="lowp_s" type="biquad *" />
<instance-data label="noise_filt" type="biquad *" />
<instance-data label="highp" type="biquad *" />
</plugin>
</ladspa>
|
