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));
}
}