143 lines
4.8 KiB
Rust
143 lines
4.8 KiB
Rust
// Copyright (c) 2021 Weird Constructor <weirdconstructor@gmail.com>
|
|
// This is a part of HexoDSP. Released under (A)GPLv3 or any later.
|
|
// See README.md and COPYING for details.
|
|
|
|
use crate::nodes::{NodeAudioContext, NodeExecContext};
|
|
use crate::dsp::{NodeId, SAtom, ProcBuf, DspNode, LedPhaseVals, NodeContext};
|
|
use crate::dsp::helpers::{DelayBuffer, crossfade, TriggerSampleClock};
|
|
|
|
#[macro_export]
|
|
macro_rules! fa_delay_mode { ($formatter: expr, $v: expr, $denorm_v: expr) => { {
|
|
let s =
|
|
match ($v.round() as usize) {
|
|
0 => "Time",
|
|
1 => "Sync",
|
|
_ => "?",
|
|
};
|
|
write!($formatter, "{}", s)
|
|
} } }
|
|
|
|
/// A simple amplifier
|
|
#[derive(Debug, Clone)]
|
|
pub struct Delay {
|
|
buffer: Box<DelayBuffer>,
|
|
clock: TriggerSampleClock,
|
|
}
|
|
|
|
impl Delay {
|
|
pub fn new(_nid: &NodeId) -> Self {
|
|
Self {
|
|
buffer: Box::new(DelayBuffer::new()),
|
|
clock: TriggerSampleClock::new(),
|
|
}
|
|
}
|
|
|
|
pub const inp : &'static str =
|
|
"Delay inp\nThe signal input for the delay. You can mix in this \
|
|
input to the output with the 'mix' parameter.\nRange: (-1..1)";
|
|
pub const trig : &'static str =
|
|
"Delay trig\nIf you set 'mode' to 'Sync', the delay time will be \
|
|
synchronized to the trigger signals received on this input.\nRange: (-1..1)";
|
|
pub const time : &'static str =
|
|
"Delay time\nThe delay time. It can be freely modulated to your \
|
|
likings.\nRange: (0..1)";
|
|
pub const fb : &'static str =
|
|
"Delay fb\nThe feedback amount of the delay output to it's input. \
|
|
\nRange: (-1..1)";
|
|
pub const mix : &'static str =
|
|
"Delay mix\nThe dry/wet mix of the delay.\nRange: (0..1)";
|
|
pub const mode : &'static str =
|
|
"Delay mode\nAllows different operating modes of the delay. \
|
|
'Time' is the default, and means that the 'time' input \
|
|
specifies the delay time. 'Sync' will synchronize the delay time \
|
|
with the trigger signals on the 'trig' input.";
|
|
pub const sig : &'static str =
|
|
"Delay sig\nThe output of the dry/wet mix.\nRange: (-1..1)";
|
|
|
|
pub const DESC : &'static str =
|
|
r#"Simple Delay Line
|
|
|
|
This is a very simple single buffer delay node.
|
|
It provides an internal feedback and dry/wet mix.
|
|
"#;
|
|
pub const HELP : &'static str =
|
|
r#"Delay - A Simple Delay Line
|
|
|
|
This node provides a very simple delay line with the bare minimum of
|
|
parameters. Most importantly a freely modulateable 'time' parameter
|
|
and a feedback 'fb' parameter.
|
|
|
|
Via the 'mix' parameter you can mix in the input signal to the output.
|
|
|
|
You can use this node to delay any kind of signal, from a simple control
|
|
signal to an audio signal.
|
|
|
|
For other kinds of delay/feedback please see also the 'FbWr'/'FbRd' nodes.
|
|
"#;
|
|
}
|
|
|
|
impl DspNode for Delay {
|
|
fn outputs() -> usize { 1 }
|
|
|
|
fn set_sample_rate(&mut self, srate: f32) {
|
|
self.buffer.set_sample_rate(srate);
|
|
}
|
|
|
|
fn reset(&mut self) {
|
|
self.buffer.reset();
|
|
self.clock.reset();
|
|
}
|
|
|
|
#[inline]
|
|
fn process<T: NodeAudioContext>(
|
|
&mut self, ctx: &mut T, _ectx: &mut NodeExecContext,
|
|
_nctx: &NodeContext,
|
|
atoms: &[SAtom], inputs: &[ProcBuf],
|
|
outputs: &mut [ProcBuf], ctx_vals: LedPhaseVals)
|
|
{
|
|
use crate::dsp::{at, out, inp, denorm};
|
|
|
|
let buffer = &mut *self.buffer;
|
|
|
|
let mode = at::Delay::mode(atoms);
|
|
let inp = inp::Delay::inp(inputs);
|
|
let trig = inp::Delay::trig(inputs);
|
|
let time = inp::Delay::time(inputs);
|
|
let fb = inp::Delay::fb(inputs);
|
|
let mix = inp::Delay::mix(inputs);
|
|
let out = out::Delay::sig(outputs);
|
|
|
|
if mode.i() == 0 {
|
|
for frame in 0..ctx.nframes() {
|
|
let dry = inp.read(frame);
|
|
|
|
let out_sample =
|
|
buffer.cubic_interpolate_at(
|
|
denorm::Delay::time(time, frame));
|
|
|
|
buffer.feed(dry + out_sample * denorm::Delay::fb(fb, frame));
|
|
|
|
out.write(frame,
|
|
crossfade(dry, out_sample,
|
|
denorm::Delay::mix(mix, frame).clamp(0.0, 1.0)));
|
|
}
|
|
} else {
|
|
for frame in 0..ctx.nframes() {
|
|
let dry = inp.read(frame);
|
|
|
|
let clock_samples =
|
|
self.clock.next(denorm::Delay::trig(trig, frame));
|
|
let out_sample = buffer.at(clock_samples as usize);
|
|
|
|
buffer.feed(dry + out_sample * denorm::Delay::fb(fb, frame));
|
|
|
|
out.write(frame,
|
|
crossfade(dry, out_sample,
|
|
denorm::Delay::mix(mix, frame).clamp(0.0, 1.0)));
|
|
}
|
|
}
|
|
|
|
let last_frame = ctx.nframes() - 1;
|
|
ctx_vals[0].set(out.read(last_frame));
|
|
}
|
|
}
|