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
use crate::dsp::{
DspNode, GraphAtomData, GraphFun, LedPhaseVals, NodeContext, NodeGlobalRef, NodeId, ProcBuf,
SAtom,
};
use crate::nodes::{NodeAudioContext, NodeExecContext};
use synfx_dsp::{apply_distortion, Oversampling, VPSOscillator};
#[macro_export]
macro_rules! fa_vosc_ovrsmpl {
($formatter: expr, $v: expr, $denorm_v: expr) => {{
let s = match ($v.round() as usize) {
0 => "Off",
1 => "On",
_ => "?",
};
write!($formatter, "{}", s)
}};
}
const OVERSAMPLING: usize = 4;
#[derive(Debug, Clone)]
pub struct VOsc {
israte: f32,
osc: VPSOscillator,
oversampling: Box<Oversampling<OVERSAMPLING>>,
}
impl VOsc {
pub fn new(nid: &NodeId, _node_global: &NodeGlobalRef) -> Self {
let init_phase = nid.init_phase();
Self {
israte: 1.0 / 44100.0,
osc: VPSOscillator::new(init_phase),
oversampling: Box::new(Oversampling::new()),
}
}
pub const freq: &'static str = "Base frequency of the oscillator.\n";
pub const det: &'static str = "Detune the oscillator in semitones and cents. \
the input of this value is rounded to semitones on coarse input. \
Fine input lets you detune in cents (rounded). \
A signal sent to this port is not rounded.\n\
Note: The signal input allows detune +-10 octaves.\
";
pub const d: &'static str = "This is the horzontal bending point of the waveform. \
It has a similar effect that pulse width settings have on other \
oscillators. Make sure to try modulating this parameter at audio rate!\
";
pub const v: &'static str = "This is the vertical bending point of the waveform. \
You can adjust the effect that ~~d~~ has on the waveform with this \
parameter. Make sure to try to modulate this parameter at audio rate!\
";
pub const vs: &'static str = "Scaling factor for ~~v~~. If you increase this beyond **1.0**, \
you will hear formant like sounds from the oscillator. Try adjusting \
~~d~~ to move the formants around.";
pub const dist: &'static str = "A collection of waveshaper/distortions to choose from.";
pub const damt: &'static str = "Distortion amount.";
pub const ovrsmpl: &'static str = "Enable/Disable oversampling.";
pub const sig: &'static str = "Oscillator output";
pub const DESC: &'static str = r#"V Oscillator
A vector phase shaping oscillator, to create interesting waveforms and ways to manipulate them.
It has two parameters (~~v~~ and ~~d~~) to shape the phase of the sinusoid wave,
and a ~~vs~~ parameter to add extra spice.
Distortion can beef up the oscillator output and you can apply oversampling.
"#;
pub const HELP: &'static str = r#"Vector Phase Shaping Oscillator
A vector phase shaping oscillator, to create interesting waveforms and
ways to manipulate them. It has two parameters (~~v~~ and ~~d~~) to shape the
phase of the sinusoid wave, and a third parameter ~~vs~~ to add extra spice.
With distortion you can beef up the oscillator output even more and to
make it more harmonic you can apply oversampling.
"#;
pub fn graph_fun() -> Option<GraphFun> {
let mut osc = VPSOscillator::new(0.0);
let israte = 1.0 / 128.0;
Some(Box::new(move |gd: &dyn GraphAtomData, init: bool, _x: f32, _xn: f32| -> f32 {
if init {
osc.reset();
}
let v = NodeId::VOsc(0).inp_param("v").unwrap().inp();
let vs = NodeId::VOsc(0).inp_param("vs").unwrap().inp();
let d = NodeId::VOsc(0).inp_param("d").unwrap().inp();
let damt = NodeId::VOsc(0).inp_param("damt").unwrap().inp();
let dist = NodeId::VOsc(0).inp_param("dist").unwrap().inp();
let v = gd.get_denorm(v as u32).clamp(0.0, 1.0);
let d = gd.get_denorm(d as u32).clamp(0.0, 1.0);
let vs = gd.get_denorm(vs as u32).clamp(0.0, 20.0);
let damt = gd.get_denorm(damt as u32);
let dist = gd.get(dist as u32).map(|a| a.i()).unwrap_or(0);
let v = VPSOscillator::limit_v(d, v + vs);
let s = osc.next(1.0, israte, d, v);
let s = apply_distortion(s, damt, dist as u8);
(s + 1.0) * 0.5
}))
}
}
impl DspNode for VOsc {
fn set_sample_rate(&mut self, srate: f32) {
self.israte = 1.0 / (srate * (OVERSAMPLING as f32));
self.oversampling.set_sample_rate(srate);
}
fn reset(&mut self) {
self.oversampling.reset();
self.osc.reset();
}
#[inline]
fn process(
&mut self,
ctx: &mut dyn NodeAudioContext,
_ectx: &mut NodeExecContext,
_nctx: &NodeContext,
atoms: &[SAtom],
inputs: &[ProcBuf],
outputs: &mut [ProcBuf],
ctx_vals: LedPhaseVals,
) {
use crate::dsp::{at, denorm, denorm_offs, inp, out};
let freq = inp::VOsc::freq(inputs);
let det = inp::VOsc::det(inputs);
let d = inp::VOsc::d(inputs);
let v = inp::VOsc::v(inputs);
let vs = inp::VOsc::vs(inputs);
let damt = inp::VOsc::damt(inputs);
let out = out::VOsc::sig(outputs);
let ovrsmpl = at::VOsc::ovrsmpl(atoms);
let dist = at::VOsc::dist(atoms);
let israte = self.israte;
let dist = dist.i() as u8;
let oversample = ovrsmpl.i() == 1;
let osc = &mut self.osc;
if oversample {
for frame in 0..ctx.nframes() {
let freq = denorm_offs::VOsc::freq(freq, det.read(frame), frame);
let v = denorm::VOsc::v(v, frame).clamp(0.0, 1.0);
let d = denorm::VOsc::d(d, frame).clamp(0.0, 1.0);
let vs = denorm::VOsc::vs(vs, frame).clamp(0.0, 20.0);
let damt = denorm::VOsc::damt(damt, frame).clamp(0.0, 1.0);
let v = VPSOscillator::limit_v(d, v + vs);
let overbuf = self.oversampling.resample_buffer();
for b in overbuf {
let s = osc.next(freq, israte, d, v);
*b = apply_distortion(s, damt, dist);
}
out.write(frame, self.oversampling.downsample());
}
} else {
for frame in 0..ctx.nframes() {
let freq = denorm_offs::VOsc::freq(freq, det.read(frame), frame);
let v = denorm::VOsc::v(v, frame).clamp(0.0, 1.0);
let d = denorm::VOsc::d(d, frame).clamp(0.0, 1.0);
let vs = denorm::VOsc::vs(vs, frame).clamp(0.0, 20.0);
let damt = denorm::VOsc::damt(damt, frame).clamp(0.0, 1.0);
let v = VPSOscillator::limit_v(d, v + vs);
let s = osc.next(freq, israte * (OVERSAMPLING as f32), d, v);
let s = apply_distortion(s, damt, dist);
out.write(frame, s);
}
}
ctx_vals[0].set(out.read(ctx.nframes() - 1));
}
}
