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Add a-Delay plugin

This commit is contained in:
Damien Zammit 2016-07-06 01:53:59 +10:00
parent 83e1d9fff3
commit de4cb2f8af
6 changed files with 734 additions and 0 deletions

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/* a-delay
* Copyright (C) 2016 Damien Zammit <damien@zamaudio.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program 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 General Public License for more details.
*/
#include <math.h>
#include <stdlib.h>
#include <stdio.h>
#include "lv2/lv2plug.in/ns/lv2core/lv2.h"
#include "lv2/lv2plug.in/ns/ext/atom/atom.h"
#include "lv2/lv2plug.in/ns/ext/time/time.h"
#include "lv2/lv2plug.in/ns/ext/atom/forge.h"
#include "lv2/lv2plug.in/ns/ext/urid/urid.h"
#define ADELAY_URI "urn:ardour:a-delay"
// 8 seconds of delay at 96kHz
#define MAX_DELAY 768000
#ifndef M_PI
# define M_PI 3.1415926
#endif
typedef enum {
ADELAY_INPUT = 0,
ADELAY_OUTPUT,
ADELAY_BPM,
ADELAY_INV,
ADELAY_SYNC,
ADELAY_TIME,
ADELAY_DIVISOR,
ADELAY_WETDRY,
ADELAY_LPF,
ADELAY_GAIN,
ADELAY_DELAYTIME,
} PortIndex;
typedef struct {
LV2_URID atom_Blank;
LV2_URID atom_Object;
LV2_URID atom_Sequence;
LV2_URID atom_Long;
LV2_URID atom_Int;
LV2_URID atom_Float;
LV2_URID atom_Double;
LV2_URID time_beatUnit;
LV2_URID time_beatsPerMinute;
LV2_URID time_Position;
} DelayURIs;
typedef struct {
float* input;
float* output;
const LV2_Atom_Sequence* atombpm;
float* inv;
float* sync;
float* time;
float* divisor;
float* wetdry;
float* lpf;
float* gain;
float* delaytime;
float srate;
float bpm;
float beatunit;
int beatuniti;
int bpmvalid;
uint32_t posz;
float tap[2];
float z[MAX_DELAY];
int active;
int next;
float fbstate;
float lpfold;
float divisorold;
float gainold;
float invertold;
float timeold;
float delaytimeold;
float syncold;
float wetdryold;
float delaysamplesold;
float A0, A1, A2, A3, A4, A5;
float B0, B1, B2, B3, B4, B5;
float state[4];
DelayURIs uris;
LV2_Atom_Forge forge;
LV2_URID_Map* map;
} ADelay;
static inline void
map_uris(LV2_URID_Map* map, DelayURIs* uris)
{
uris->atom_Blank = map->map(map->handle, LV2_ATOM__Blank);
uris->atom_Object = map->map(map->handle, LV2_ATOM__Object);
uris->atom_Sequence = map->map(map->handle, LV2_ATOM__Sequence);
uris->atom_Long = map->map(map->handle, LV2_ATOM__Long);
uris->atom_Int = map->map(map->handle, LV2_ATOM__Int);
uris->atom_Float = map->map(map->handle, LV2_ATOM__Float);
uris->atom_Double = map->map(map->handle, LV2_ATOM__Double);
uris->time_beatUnit = map->map(map->handle, LV2_TIME__beatUnit);
uris->time_beatsPerMinute = map->map(map->handle, LV2_TIME__beatsPerMinute);
uris->time_Position = map->map(map->handle, LV2_TIME__Position);
}
static LV2_Handle
instantiate(const LV2_Descriptor* descriptor,
double rate,
const char* bundle_path,
const LV2_Feature* const* features)
{
int i;
ADelay* adelay = (ADelay*)calloc(1, sizeof(ADelay));
if (!adelay) return NULL;
for (i = 0; features[i]; ++i) {
if (!strcmp(features[i]->URI, LV2_URID__map)) {
adelay->map = (LV2_URID_Map*)features[i]->data;
}
}
if (!adelay->map) {
fprintf(stderr, "a-delay.lv2 error: Host does not support urid:map\n");
free(adelay);
return NULL;
}
map_uris(adelay->map, &adelay->uris);
lv2_atom_forge_init(&adelay->forge, adelay->map);
adelay->srate = rate;
adelay->bpmvalid = 0;
return (LV2_Handle)adelay;
}
static void
connect_port(LV2_Handle instance,
uint32_t port,
void* data)
{
ADelay* adelay = (ADelay*)instance;
switch ((PortIndex)port) {
case ADELAY_INPUT:
adelay->input = (float*)data;
break;
case ADELAY_OUTPUT:
adelay->output = (float*)data;
break;
case ADELAY_BPM:
adelay->atombpm = (const LV2_Atom_Sequence*)data;
break;
case ADELAY_INV:
adelay->inv = (float*)data;
break;
case ADELAY_SYNC:
adelay->sync = (float*)data;
break;
case ADELAY_TIME:
adelay->time = (float*)data;
break;
case ADELAY_DIVISOR:
adelay->divisor = (float*)data;
break;
case ADELAY_WETDRY:
adelay->wetdry = (float*)data;
break;
case ADELAY_LPF:
adelay->lpf = (float*)data;
break;
case ADELAY_GAIN:
adelay->gain = (float*)data;
break;
case ADELAY_DELAYTIME:
adelay->delaytime = (float*)data;
break;
}
}
static inline float
sanitize_denormal(float value) {
if (!isnormal(value)) {
value = 0.f;
}
return value;
}
static inline float
from_dB(float gdb) {
return (exp(gdb/20.f*log(10.f)));
}
static inline float
to_dB(float g) {
return (20.f*log10(g));
}
static void clearfilter(LV2_Handle instance)
{
ADelay* adelay = (ADelay*)instance;
adelay->state[0] = adelay->state[1] =
adelay->state[2] = adelay->state[3] = 0.f;
}
static void
activate(LV2_Handle instance)
{
ADelay* adelay = (ADelay*)instance;
int i;
for (i = 0; i < MAX_DELAY; i++) {
adelay->z[i] = 0.f;
}
adelay->posz = 0;
adelay->tap[0] = 0;
adelay->tap[1] = 0;
adelay->active = 0;
adelay->next = 1;
adelay->fbstate = 0.f;
clearfilter(adelay);
adelay->lpfold = 0.f;
adelay->divisorold = 0.f;
adelay->gainold = 0.f;
adelay->invertold = 0.f;
adelay->timeold = 0.f;
adelay->delaytimeold = 0.f;
adelay->syncold = 0.f;
adelay->wetdryold = 0.f;
adelay->delaysamplesold = 1.f;
}
static void lpfRbj(LV2_Handle instance, float fc, float srate)
{
ADelay* adelay = (ADelay*)instance;
float w0, alpha, cw, sw, q;
q = 0.707;
w0 = (2. * M_PI * fc / srate);
sw = sin(w0);
cw = cos(w0);
alpha = sw / (2. * q);
adelay->A0 = 1. + alpha;
adelay->A1 = -2. * cw;
adelay->A2 = 1. - alpha;
adelay->B0 = (1. - cw) / 2.;
adelay->B1 = (1. - cw);
adelay->B2 = adelay->B0;
adelay->A3 = 1. + alpha;
adelay->A4 = -2. * cw;
adelay->A5 = 1. - alpha;
adelay->B3 = (1. - cw) / 2.;
adelay->B4 = (1. - cw);
adelay->B5 = adelay->B3;
}
static float runfilter(LV2_Handle instance, float in)
{
ADelay* a = (ADelay*)instance;
float out;
in = sanitize_denormal(in);
out = a->B0/a->A0*in + a->B1/a->A0*a->state[0] + a->B2/a->A0*a->state[1]
-a->A1/a->A0*a->state[2] - a->A2/a->A0*a->state[3] + 1e-20;
a->state[1] = a->state[0];
a->state[0] = in;
a->state[3] = a->state[2];
a->state[2] = out;
return out;
}
static void
update_bpm(ADelay* self, const LV2_Atom_Object* obj)
{
const DelayURIs* uris = &self->uris;
// Received new transport bpm/beatunit
LV2_Atom *beatunit = NULL, *bpm = NULL;
lv2_atom_object_get(obj,
uris->time_beatUnit, &beatunit,
uris->time_beatsPerMinute, &bpm,
NULL);
// Tempo changed, update BPM
if (bpm && bpm->type == uris->atom_Float) {
self->bpm = ((LV2_Atom_Float*)bpm)->body;
}
// Time signature changed, update beatunit
if (beatunit && beatunit->type == uris->atom_Int) {
int b = ((LV2_Atom_Int*)beatunit)->body;
self->beatunit = (float)b;
}
if (beatunit && beatunit->type == uris->atom_Double) {
double b = ((LV2_Atom_Double*)beatunit)->body;
self->beatunit = (float)b;
}
if (beatunit && beatunit->type == uris->atom_Float) {
self->beatunit = ((LV2_Atom_Float*)beatunit)->body;
}
if (beatunit && beatunit->type == uris->atom_Long) {
long int b = ((LV2_Atom_Long*)beatunit)->body;
self->beatunit = (float)b;
}
self->bpmvalid = 1;
}
static void
run(LV2_Handle instance, uint32_t n_samples)
{
ADelay* adelay = (ADelay*)instance;
const float* const input = adelay->input;
float* const output = adelay->output;
float srate = adelay->srate;
uint32_t i;
float in;
int delaysamples;
unsigned int tmp;
float inv;
float xfade;
int recalc;
if (*(adelay->inv) < 0.5) {
inv = -1.f;
} else {
inv = 1.f;
}
recalc = 0;
if (*(adelay->inv) != adelay->invertold) {
recalc = 1;
}
if (*(adelay->sync) != adelay->syncold) {
recalc = 1;
}
if (*(adelay->time) != adelay->timeold) {
recalc = 1;
}
if (*(adelay->divisor) != adelay->divisorold) {
recalc = 1;
}
if (*(adelay->lpf) != adelay->lpfold) {
lpfRbj(adelay, *(adelay->lpf), srate);
}
if (*(adelay->gain) != adelay->gainold) {
recalc = 1;
}
if (recalc) {
if (*(adelay->sync) > 0.5f && adelay->bpmvalid) {
*(adelay->delaytime) = adelay->beatunit * 1000.f * 60.f / (adelay->bpm * *(adelay->divisor));
} else {
*(adelay->delaytime) = *(adelay->time);
}
delaysamples = (int)(*(adelay->delaytime) * srate) / 1000;
adelay->tap[adelay->next] = delaysamples;
}
xfade = 0.f;
for (i = 0; i < n_samples; i++) {
in = input[i];
adelay->z[adelay->posz] = in; // + feedb / 100. * fbstate;
adelay->fbstate = 0.f;
int p = adelay->posz - adelay->tap[adelay->active]; // active line
if (p<0) p += MAX_DELAY;
adelay->fbstate += adelay->z[p];
if (recalc) {
xfade += 1.0f / (float)n_samples;
adelay->fbstate *= (1.-xfade);
int p = adelay->posz - adelay->tap[adelay->next]; // next line
if (p<0) p += MAX_DELAY;
adelay->fbstate += adelay->z[p] * xfade;
}
output[i] = from_dB(*(adelay->gain)) * ((100.-*(adelay->wetdry)) / 100. * in + *(adelay->wetdry) / 100. * -inv * runfilter(adelay, adelay->fbstate));
if (++(adelay->posz) >= MAX_DELAY) {
adelay->posz = 0;
}
}
adelay->lpfold = *(adelay->lpf);
adelay->divisorold = *(adelay->divisor);
adelay->gainold = *(adelay->gain);
adelay->invertold = *(adelay->inv);
adelay->timeold = *(adelay->time);
adelay->syncold = *(adelay->sync);
adelay->wetdryold = *(adelay->wetdry);
adelay->delaytimeold = *(adelay->delaytime);
adelay->delaysamplesold = delaysamples;
if (recalc) {
tmp = adelay->active;
adelay->active = adelay->next;
adelay->next = tmp;
}
if (adelay->atombpm) {
LV2_Atom_Event* ev = lv2_atom_sequence_begin(&(adelay->atombpm)->body);
while(!lv2_atom_sequence_is_end(&(adelay->atombpm)->body, (adelay->atombpm)->atom.size, ev)) {
if (ev->body.type == adelay->uris.atom_Blank || ev->body.type == adelay->uris.atom_Object) {
const LV2_Atom_Object* obj = (LV2_Atom_Object*)&ev->body;
if (obj->body.otype == adelay->uris.time_Position) {
update_bpm(adelay, obj);
}
}
ev = lv2_atom_sequence_next(ev);
}
}
}
static void
cleanup(LV2_Handle instance)
{
free(instance);
}
static const void*
extension_data(const char* uri)
{
return NULL;
}
static const LV2_Descriptor descriptor = {
ADELAY_URI,
instantiate,
connect_port,
activate,
run,
NULL,
cleanup,
extension_data
};
LV2_SYMBOL_EXPORT
const LV2_Descriptor*
lv2_descriptor(uint32_t index)
{
switch (index) {
case 0:
return &descriptor;
default:
return NULL;
}
}

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@prefix atom: <http://lv2plug.in/ns/ext/atom#> .
@prefix doap: <http://usefulinc.com/ns/doap#> .
@prefix foaf: <http://xmlns.com/foaf/0.1/> .
@prefix lv2: <http://lv2plug.in/ns/lv2core#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix rsz: <http://lv2plug.in/ns/ext/resize-port#> .
@prefix unit: <http://lv2plug.in/ns/extensions/units#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
<http://ardour.org/credits.html>
a foaf:Person ;
foaf:name "Ardour Team" ;
foaf:homepage <http://ardour.org/> .
<urn:ardour:a-delay>
a lv2:Plugin, doap:Project, lv2:DelayPlugin ;
lv2:optionalFeature <http://lv2plug.in/ns/lv2core#hardRTCapable>;
lv2:requiredFeature <http://lv2plug.in/ns/ext/options#options> ,
<http://lv2plug.in/ns/ext/urid#map> ;
lv2:port [
a lv2:InputPort, lv2:AudioPort ;
lv2:index 0 ;
lv2:symbol "in_1" ;
lv2:name "Audio Input 1" ;
] ;
lv2:port [
a lv2:OutputPort, lv2:AudioPort ;
lv2:index 1 ;
lv2:symbol "out_1" ;
lv2:name "Audio Output 1" ;
] ;
lv2:port [
a lv2:InputPort, atom:AtomPort ;
lv2:index 2 ;
lv2:name "BPM Input" ;
lv2:symbol "bpm_in" ;
rsz:minimumSize 2048 ;
atom:bufferType atom:Sequence ;
atom:supports <http://lv2plug.in/ns/ext/time#Position> ;
] ;
lv2:port [
a lv2:InputPort, lv2:ControlPort ;
lv2:index 3 ;
lv2:name "Invert" ;
lv2:symbol "inv" ;
lv2:default 0.000000 ;
lv2:minimum 0.000000 ;
lv2:maximum 1.000000 ;
lv2:portProperty lv2:toggled ;
] ,
[
a lv2:InputPort, lv2:ControlPort ;
lv2:index 4 ;
lv2:name "Sync BPM" ;
lv2:symbol "sync" ;
lv2:default 0.000000 ;
lv2:minimum 0.000000 ;
lv2:maximum 1.000000 ;
lv2:portProperty lv2:toggled ;
] ,
[
a lv2:InputPort, lv2:ControlPort ;
lv2:index 5 ;
lv2:name "Time" ;
lv2:symbol "time" ;
lv2:default 160.000000 ;
lv2:minimum 1.000000 ;
lv2:maximum 8000.000000 ;
unit:unit unit:ms ;
lv2:portProperty <http://lv2plug.in/ns/ext/port-props#logarithmic> ;
] ,
[
a lv2:InputPort, lv2:ControlPort ;
lv2:index 6 ;
lv2:name "Divisor" ;
lv2:symbol "div" ;
lv2:default 4 ;
lv2:minimum 1 ;
lv2:maximum 48 ;
lv2:portProperty <http://lv2plug.in/ns/ext/port-props#hasStrictBounds> ;
lv2:portProperty lv2:enumeration ;
lv2:portProperty lv2:integer ;
lv2:scalePoint [ rdfs:label "a - Whole note"; rdf:value 1 ] ;
lv2:scalePoint [ rdfs:label "b - Half note"; rdf:value 2 ] ;
lv2:scalePoint [ rdfs:label "c - ♩"; rdf:value 4 ] ;
lv2:scalePoint [ rdfs:label "d - ♪"; rdf:value 8 ] ;
lv2:scalePoint [ rdfs:label "e - ♬"; rdf:value 16 ] ;
lv2:scalePoint [ rdfs:label "f - 32nd note"; rdf:value 32 ] ;
lv2:scalePoint [ rdfs:label "g - ♩³ (Triplet)"; rdf:value 6 ] ;
lv2:scalePoint [ rdfs:label "h - ♪³ (Triplet)"; rdf:value 12 ] ;
lv2:scalePoint [ rdfs:label "i - ♬³ (Triplet)"; rdf:value 24 ] ;
lv2:scalePoint [ rdfs:label "j - 32nd note (Triplet)"; rdf:value 48 ] ;
] ,
[
a lv2:InputPort, lv2:ControlPort ;
lv2:index 7 ;
lv2:name "Dry/Wet" ;
lv2:symbol "drywet" ;
lv2:default 50.000000 ;
lv2:minimum 0.000000 ;
lv2:maximum 100.000000 ;
unit:unit unit:pc ;
] ,
[
a lv2:InputPort, lv2:ControlPort ;
lv2:index 8 ;
lv2:name "LPF" ;
lv2:symbol "lpf" ;
lv2:default 6000.000000 ;
lv2:minimum 20.000000 ;
lv2:maximum 20000.000000 ;
unit:unit unit:hz ;
lv2:portProperty <http://lv2plug.in/ns/ext/port-props#logarithmic> ;
] ,
[
a lv2:InputPort, lv2:ControlPort ;
lv2:index 9 ;
lv2:name "Output Gain" ;
lv2:symbol "gain" ;
lv2:default 0.000000 ;
lv2:minimum -60.000000 ;
lv2:maximum 0.000000 ;
unit:unit unit:db ;
] ,
[
a lv2:OutputPort, lv2:ControlPort ;
lv2:index 10 ;
lv2:name "Delaytime" ;
lv2:symbol "delaytime" ;
lv2:default 0.000000 ;
lv2:minimum 1.000000 ;
lv2:maximum 8000.000000 ;
unit:unit unit:ms ;
] ;
rdfs:comment """
A simple delay plugin
""" ;
doap:name "a-Delay" ;
doap:license "GPL v2+" ;
doap:maintainer <http://ardour.org/credits.html>
# ui:ui <urn:ardour:a-delay#ui>;
lv2:microVersion 1 ;
lv2:minorVersion 1 .

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@prefix lv2: <http://lv2plug.in/ns/lv2core#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix pset: <http://lv2plug.in/ns/ext/presets#> .
@prefix ui: <http://lv2plug.in/ns/extensions/ui#> .
<urn:ardour:a-delay>
a lv2:Plugin ;
lv2:binary <a-delay@LIB_EXT@> ;
rdfs:seeAlso <a-delay.ttl> .
#<urn:ardour:a-delay#ui>
# a ui:GtkUI ;
# ui:binary <a-delay-ui@LIB_EXT@> ;
# rdfs:seeAlso <a-delay.ttl> .
<urn:ardour:a-delay#preset001>
a pset:Preset ;
lv2:appliesTo <urn:ardour:a-delay> ;
rdfs:label "Zero" ;
rdfs:seeAlso <presets.ttl> .

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@prefix lv2: <http://lv2plug.in/ns/lv2core#> .
@prefix pset: <http://lv2plug.in/ns/ext/presets#> .
<urn:ardour:a-delay#preset001>
lv2:port [
lv2:symbol "inv" ;
pset:value 0.000000 ;
] ,
[
lv2:symbol "sync" ;
pset:value 0.000000 ;
] ,
[
lv2:symbol "time" ;
pset:value 160.000000 ;
] ,
[
lv2:symbol "div" ;
pset:value 3 ;
] ,
[
lv2:symbol "drywet" ;
pset:value 50.000000 ;
] ,
[
lv2:symbol "lpf" ;
pset:value 6000.000000 ;
] ,
[
lv2:symbol "gain" ;
pset:value 0.000000 ;
] ,
[
lv2:symbol "delaytime" ;
pset:value 0.000000 ;
] .

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#!/usr/bin/env python
import os
import re
import shutil
import waflib.extras.autowaf as autowaf
import waflib.Options as Options, waflib.Utils as Utils
# Mandatory variables
top = '.'
out = 'build'
def options(opt):
autowaf.set_options(opt)
def configure(conf):
conf.load('compiler_c')
autowaf.configure(conf)
if Options.options.lv2:
autowaf.check_pkg(conf, 'lv2', atleast_version='1.0.0',
uselib_store='LV2_1_0_0')
autowaf.check_pkg(conf, 'cairo', uselib_store='CAIRO', atleast_version='1.12.0')
def build(bld):
bundle = 'a-delay.lv2'
module_pat = re.sub('^lib', '', bld.env.cshlib_PATTERN)
module_ext = module_pat[module_pat.rfind('.'):]
if bld.is_defined ('HAVE_LV2'):
# Build RDF files
for i in ['manifest.ttl', 'a-delay.ttl', 'presets.ttl']:
bld(features = 'subst',
source = i + '.in',
target = '../../LV2/%s/%s' % (bundle, i),
install_path = '${LV2DIR}/%s' % bundle,
chmod = Utils.O644,
LIB_EXT = module_ext)
# Build plugin library
obj = bld(features = 'c cshlib',
source = 'a-delay.c',
name = 'a-delay',
cflags = [ '-fPIC', bld.env['compiler_flags_dict']['c99'] ],
includes = [ '../../ardour' ],
target = '../../LV2/%s/a-delay' % bundle,
install_path = '${LV2DIR}/%s' % bundle,
uselib = 'CAIRO',
use = 'LV2_1_0_0'
)
obj.env.cshlib_PATTERN = module_pat
obj.env.cxxshlib_PATTERN = module_pat
# vi:set ts=4 sw=4 et:

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@ -220,6 +220,7 @@ children = [
'libs/canvas', 'libs/canvas',
'libs/plugins/reasonablesynth.lv2', 'libs/plugins/reasonablesynth.lv2',
'libs/plugins/a-comp.lv2', 'libs/plugins/a-comp.lv2',
'libs/plugins/a-delay.lv2',
'gtk2_ardour', 'gtk2_ardour',
'export', 'export',
'midi_maps', 'midi_maps',