/usr/lib/lv2/sifter-swh.lv2/plugin.ttl is in swh-lv2 1.0.15+20130517.git978d5d8-1.
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 | @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:sifter a :Plugin ;
a :TimePlugin ;
a :DistortionPlugin ;
doap:name "Signal sifter" ;
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#sifter> ;
:port [
a :InputPort, :ControlPort ;
:name "Sift size" ;
:index 0 ;
:symbol "size" ;
:minimum 1 ;
:maximum 1000 ;
:default 1.0 ;
] ;
:port [
a :InputPort, :AudioPort ;
:name "Input" ;
:index 1 ;
:symbol "input" ;
] ;
:port [
a :OutputPort, :AudioPort ;
:name "Output" ;
:index 2 ;
:symbol "output" ;
] ;
swhext:code """
#include "ladspa-util.h"
#define MAX_BSIZE 1000
inline int partition(LADSPA_Data array[], int left, int right);
/* required for clang compilation */
void q_sort(LADSPA_Data array[], int left, int right);
inline void q_sort(LADSPA_Data array[], int left, int right) {
float pivot = partition(array, left, right);
if (left < pivot) {
q_sort(array, left, pivot-1);
}
if (right > pivot) {
q_sort(array, pivot+1, right);
}
}
inline int partition(LADSPA_Data array[], int left, int right) {
float pivot = array[left];
while (left < right) {
while (array[right] >= pivot && left < right) {
right--;
}
if (left != right) {
array[left] = array[right];
left++;
}
while (array[left] <= pivot && left < right) {
left++;
}
if (left != right) {
array[right] = array[left];
right--;
}
}
array[left] = pivot;
return left;
}
""" ;
swhext:callback [
swhext:event "instantiate" ;
swhext:code """
long i;
float scla = (float)MAX_BSIZE * 0.5f;
float sclb = (float)MAX_BSIZE;
b1 = (LADSPA_Data *)calloc(MAX_BSIZE, sizeof(LADSPA_Data));
b2 = (LADSPA_Data *)calloc(MAX_BSIZE, sizeof(LADSPA_Data));
ob = (LADSPA_Data *)calloc(MAX_BSIZE, sizeof(LADSPA_Data));
rc = (LADSPA_Data *)calloc(MAX_BSIZE, sizeof(LADSPA_Data));
// Calculate raised cosine table, to build windowing function from
rc[0] = cos(((0.0f - scla) / sclb) * M_PI);
rc[0] *= rc[0];
for (i=1; i<MAX_BSIZE / 2; i++) {
rc[i] = cos((((float)i - scla) / sclb) * M_PI);
rc[i] *= rc[i];
rc[MAX_BSIZE - i] = rc[i];
}
rc[MAX_BSIZE / 2] = 1.0f;
b1ptr = 0;
b2ptr = 0;
""" ;
] ;
swhext:callback [
swhext:event "activate" ;
swhext:code """
b1ptr = 0;
b2ptr = 0;
memset(b1, 0, MAX_BSIZE * sizeof(LADSPA_Data));
memset(b2, 0, MAX_BSIZE * sizeof(LADSPA_Data));
memset(ob, 0, MAX_BSIZE * sizeof(LADSPA_Data));
""" ;
] ;
swhext:callback [
swhext:event "cleanup" ;
swhext:code """
free(plugin_data->b1);
free(plugin_data->b2);
free(plugin_data->ob);
free(plugin_data->rc);
""" ;
] ;
swhext:callback [
swhext:event "run" ;
swhext:code """
unsigned long pos, i;
long bsize = f_round(LIMIT(size, 1, MAX_BSIZE));
for (pos = 0; pos < sample_count; pos++) {
if (b1ptr >= bsize) {
float wstep = (float)MAX_BSIZE / (float)b1ptr, wpos = 0.0f;
q_sort(b1, 0, b1ptr);
for (i=0; i<b1ptr; i++) {
ob[i] += b1[i] * rc[f_round(wpos)];
wpos += wstep;
}
b1ptr = 0;
b2ptr = (bsize+1) / 2;
}
if (b2ptr >= bsize) {
float wstep = (float)MAX_BSIZE / (float)b2ptr, wpos = 0.0f;
int offset = (b2ptr+1)/2;
q_sort(b2, 0, b2ptr);
for (i=0; i<offset; i++) {
ob[i + offset] += b2[i] * rc[f_round(wpos)];
wpos += wstep;
}
for (; i<b2ptr; i++) {
ob[i - offset] += b2[i] * rc[f_round(wpos)];
wpos += wstep;
}
b2ptr = 0;
}
if (bsize < 2) {
ob[b1ptr] = input[pos];
}
b1[b1ptr] = input[pos];
b2[b2ptr] = input[pos];
buffer_write(output[pos], ob[b1ptr]);
ob[b1ptr] = 0.0f;
b1ptr++;
b2ptr++;
}
plugin_data->b1ptr = b1ptr;
plugin_data->b2ptr = b2ptr;
""" ;
] ;
swhext:createdBy <http://plugin.org.uk/swh-plugins/toTurtle.xsl> .
|