/usr/lib/lv2/bode_shifter-swh.lv2/plugin.ttl is in swh-lv2 1.0.15+git20151104~repack0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 | @prefix : <http://lv2plug.in/ns/lv2core#> .
@prefix swh: <http://plugin.org.uk/swh-plugins/> .
@prefix foaf: <http://xmlns.com/foaf/0.1/> .
@prefix doap: <http://usefulinc.com/ns/doap#> .
@prefix swhext: <http://plugin.org.uk/extensions#> .
@prefix pg: <http://lv2plug.in/ns/ext/port-groups#> .
@prefix pprops: <http://lv2plug.in/ns/ext/port-props#> .
swh:bodeShifter a :Plugin ;
a :SpectralPlugin ;
doap:name "Bode frequency shifter" ;
doap:maintainer [
foaf:name "Steve Harris";
foaf:homepage <http://plugin.org.uk/> ;
foaf:mbox <mailto:steve@plugin.org.uk> ;
] ;
doap:license <http://usefulinc.com/doap/licenses/gpl> ;
:documentation <http://plugin.org.uk/ladspa-swh/docs/ladspa-swh.html#bodeShifter> ;
:pluginProperty :hardRtCapable ;
:port [
a :InputPort, :ControlPort ;
:name "Frequency shift" ;
:index 0 ;
:symbol "shift" ;
:minimum 0 ;
:maximum 5000 ;
:default 0.0 ;
] ;
:port [
a :InputPort, :AudioPort ;
:name "Input" ;
:index 1 ;
:symbol "input" ;
] ;
:port [
a :OutputPort, :AudioPort ;
:name "Down out" ;
:index 2 ;
:symbol "dout" ;
] ;
:port [
a :OutputPort, :AudioPort ;
:name "Up out" ;
:index 3 ;
:symbol "uout" ;
] ;
:port [
a :OutputPort, :ControlPort ;
:name "latency" ;
:index 4 ;
:symbol "latency" ;
:portProperty :reportsLatency ;
] ;
swhext:code """
#include <math.h>
#include "ladspa-util.h"
#define SIN_T_SIZE 1024
#define D_SIZE 256
#define NZEROS 200
/* The non-zero taps of the Hilbert transformer */
static float xcoeffs[] = {
+0.0008103736f, +0.0008457886f, +0.0009017196f, +0.0009793364f,
+0.0010798341f, +0.0012044365f, +0.0013544008f, +0.0015310235f,
+0.0017356466f, +0.0019696659f, +0.0022345404f, +0.0025318040f,
+0.0028630784f, +0.0032300896f, +0.0036346867f, +0.0040788644f,
+0.0045647903f, +0.0050948365f, +0.0056716186f, +0.0062980419f,
+0.0069773575f, +0.0077132300f, +0.0085098208f, +0.0093718901f,
+0.0103049226f, +0.0113152847f, +0.0124104218f, +0.0135991079f,
+0.0148917649f, +0.0163008758f, +0.0178415242f, +0.0195321089f,
+0.0213953037f, +0.0234593652f, +0.0257599469f, +0.0283426636f,
+0.0312667947f, +0.0346107648f, +0.0384804823f, +0.0430224431f,
+0.0484451086f, +0.0550553725f, +0.0633242001f, +0.0740128560f,
+0.0884368322f, +0.1090816773f, +0.1412745301f, +0.1988673273f,
+0.3326528346f, +0.9997730178f, -0.9997730178f, -0.3326528346f,
-0.1988673273f, -0.1412745301f, -0.1090816773f, -0.0884368322f,
-0.0740128560f, -0.0633242001f, -0.0550553725f, -0.0484451086f,
-0.0430224431f, -0.0384804823f, -0.0346107648f, -0.0312667947f,
-0.0283426636f, -0.0257599469f, -0.0234593652f, -0.0213953037f,
-0.0195321089f, -0.0178415242f, -0.0163008758f, -0.0148917649f,
-0.0135991079f, -0.0124104218f, -0.0113152847f, -0.0103049226f,
-0.0093718901f, -0.0085098208f, -0.0077132300f, -0.0069773575f,
-0.0062980419f, -0.0056716186f, -0.0050948365f, -0.0045647903f,
-0.0040788644f, -0.0036346867f, -0.0032300896f, -0.0028630784f,
-0.0025318040f, -0.0022345404f, -0.0019696659f, -0.0017356466f,
-0.0015310235f, -0.0013544008f, -0.0012044365f, -0.0010798341f,
-0.0009793364f, -0.0009017196f, -0.0008457886f, -0.0008103736f,
};
""" ;
swhext:callback [
swhext:event "instantiate" ;
swhext:code """
unsigned int i;
fs = (float)s_rate;
delay = calloc(D_SIZE, sizeof(LADSPA_Data));
sint = calloc(SIN_T_SIZE + 4, sizeof(float));
dptr = 0;
phi = 0.0f;
last_shift = 0.0f;
for (i = 0; i < SIN_T_SIZE + 4; i++) {
sint[i] = sinf(2.0f * M_PI * (float)i / (float)SIN_T_SIZE);
}
""" ;
] ;
swhext:callback [
swhext:event "cleanup" ;
swhext:code """
free(plugin_data->delay);
free(plugin_data->sint);
""" ;
] ;
swhext:callback [
swhext:event "run" ;
swhext:code """
unsigned long pos;
unsigned int i;
float hilb, rm1, rm2;
float shift_i = last_shift;
int int_p;
float frac_p;
const float shift_c = f_clamp(shift, 0.0f, 10000.0f);
const float shift_inc = (shift_c - last_shift) / (float)sample_count;
const float freq_fix = (float)SIN_T_SIZE / fs;
for (pos = 0; pos < sample_count; pos++) {
delay[dptr] = input[pos];
/* Perform the Hilbert FIR convolution
* (probably FFT would be faster) */
hilb = 0.0f;
for (i = 0; i < NZEROS/2; i++) {
hilb += (xcoeffs[i] * delay[(dptr - i*2) & (D_SIZE - 1)]);
}
/* Calcuate the table positions for the sine modulator */
int_p = f_round(floor(phi));
/* Calculate ringmod1, the transformed input modulated with a shift Hz
* sinewave. This creates a +180 degree sideband at source-shift Hz and
* a 0 degree sindeband at source+shift Hz */
frac_p = phi - int_p;
/* the Hilbert has a gain of pi/2, which we have to correct for, thanks
* Fons! */
rm1 = hilb * 0.63661978f * cube_interp(frac_p, sint[int_p],
sint[int_p+1], sint[int_p+2], sint[int_p+3]);
/* Calcuate the table positions for the cosine modulator */
int_p = (int_p + SIN_T_SIZE / 4) & (SIN_T_SIZE - 1);
/* Calculate ringmod2, the delayed input modulated with a shift Hz
* cosinewave. This creates a 0 degree sideband at source+shift Hz
* and a -180 degree sindeband at source-shift Hz */
rm2 = delay[(dptr - 99) & (D_SIZE - 1)] * cube_interp(frac_p,
sint[int_p], sint[int_p+1], sint[int_p+2], sint[int_p+3]);
/* Output the sum and differences of the ringmods. The +/-180 degree
* sidebands cancel (more of less) and just leave the shifted
* components */
buffer_write(dout[pos], (rm2 - rm1) * 0.5f);
buffer_write(uout[pos], (rm2 + rm1) * 0.5f);
dptr = (dptr + 1) & (D_SIZE - 1);
phi += shift_i * freq_fix;
while (phi > SIN_T_SIZE) {
phi -= SIN_T_SIZE;
}
shift_i += shift_inc;
}
plugin_data->dptr = dptr;
plugin_data->phi = phi;
plugin_data->last_shift = shift_c;
*(plugin_data->latency) = 99;
""" ;
] ;
swhext:createdBy <http://plugin.org.uk/swh-plugins/toTurtle.xsl> .
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