/usr/lib/lv2/am_pitchshift-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 | @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:amPitchshift a :Plugin ;
a :PitchPlugin ;
doap:name "AM pitchshifter" ;
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#amPitchshift> ;
:pluginProperty :hardRtCapable ;
:port [
a :InputPort, :ControlPort ;
:name "Pitch shift" ;
:index 0 ;
:symbol "pitch" ;
:minimum 0.25 ;
:maximum 4.0 ;
:default 1.0 ;
:portProperty pprops:logarithmic ;
] ;
:port [
a :InputPort, :ControlPort ;
:name "Buffer size" ;
:index 1 ;
:symbol "size" ;
:minimum 1 ;
:maximum 7 ;
:default 4 ;
:portProperty :integer ;
] ;
:port [
a :InputPort, :AudioPort ;
:name "Input" ;
:index 2 ;
:symbol "input" ;
] ;
:port [
a :OutputPort, :AudioPort ;
:name "Output" ;
:index 3 ;
:symbol "output" ;
] ;
:port [
a :OutputPort, :ControlPort ;
:name "latency" ;
:index 4 ;
:symbol "latency" ;
:portProperty :reportsLatency ;
] ;
swhext:code """
#include <stdlib.h>
#include <math.h>
#include "ladspa-util.h"
/* Beware of dependcies if you change this */
#define DELAY_SIZE 8192
""" ;
swhext:callback [
swhext:event "instantiate" ;
swhext:code """
delay = calloc(DELAY_SIZE, sizeof(LADSPA_Data));
rptr.all = 0;
wptr = 0;
last_size = -1;
delay_mask = 0xFF;
delay_ofs = 0x80;
last_gain = 0.5f;
count = 0;
last_inc = 0.0f;
""" ;
] ;
swhext:callback [
swhext:event "cleanup" ;
swhext:code """
free(plugin_data->delay);
""" ;
] ;
swhext:callback [
swhext:event "run" ;
swhext:code """
unsigned long pos;
fixp16 om;
float gain = last_gain, gain_inc = last_inc;
unsigned int i;
om.all = f_round(pitch * 65536.0f);
if (size != last_size) {
int size_tmp = f_round(size);
if (size_tmp > 7) {
size_tmp = 5;
} else if (size_tmp < 1) {
size_tmp = 1;
}
plugin_data->last_size = size;
/* Calculate the ringbuf parameters, the magick constants will need
* to be changed if you change DELAY_SIZE */
delay_mask = (1 << (size_tmp + 6)) - 1;
delay_ofs = 1 << (size_tmp + 5);
}
for (pos = 0; pos < sample_count; pos++) {
float out = 0.0f;
if (count++ > 14) {
float tmp;
count = 0;
tmp = 0.5f * (float)((rptr.part.in - wptr + delay_ofs/2) &
delay_mask) / (float)delay_ofs;
tmp = sinf(M_PI * 2.0f * tmp) * 0.5f + 0.5f;
gain_inc = (tmp - gain) / 15.0f;
}
gain += gain_inc;
delay[wptr] = input[pos];
/* Add contributions from the two readpointers, scaled by thier
* distance from the write pointer */
i = rptr.part.in;
out += cube_interp((float)rptr.part.fr * 0.0000152587f,
delay[(i - 1) & delay_mask], delay[i],
delay[(i + 1) & delay_mask],
delay[(i + 2) & delay_mask]) * (1.0f - gain);
i += delay_ofs;
out += cube_interp((float)rptr.part.fr * 0.0000152587f,
delay[(i - 1) & delay_mask], delay[i & delay_mask],
delay[(i + 1) & delay_mask],
delay[(i + 2) & delay_mask]) * gain;
buffer_write(output[pos], out);
/* Increment ringbuffer pointers */
wptr = (wptr + 1) & delay_mask;
rptr.all += om.all;
rptr.part.in &= delay_mask;
}
plugin_data->rptr.all = rptr.all;
plugin_data->wptr = wptr;
plugin_data->delay_mask = delay_mask;
plugin_data->delay_ofs = delay_ofs;
plugin_data->last_gain = gain;
plugin_data->count = count;
plugin_data->last_inc = gain_inc;
*(plugin_data->latency) = delay_ofs/2;
""" ;
] ;
swhext:createdBy <http://plugin.org.uk/swh-plugins/toTurtle.xsl> .
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