144 lines
4.8 KiB
Rust
144 lines
4.8 KiB
Rust
// Copyright (c) 2021 Weird Constructor <weirdconstructor@gmail.com>
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// This file is a part of HexoDSP. Released under GPL-3.0-or-later.
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// See README.md and COPYING for details.
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use crate::nodes::{NodeAudioContext, NodeExecContext};
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use crate::dsp::{NodeId, SAtom, ProcBuf, DspNode, LedPhaseVals, NodeContext};
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use crate::dsp::helpers::{DelayBuffer, crossfade, TriggerSampleClock};
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#[macro_export]
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macro_rules! fa_delay_mode { ($formatter: expr, $v: expr, $denorm_v: expr) => { {
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let s =
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match ($v.round() as usize) {
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0 => "Time",
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1 => "Sync",
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_ => "?",
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};
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write!($formatter, "{}", s)
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} } }
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/// A simple amplifier
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#[derive(Debug, Clone)]
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pub struct Delay {
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buffer: Box<DelayBuffer>,
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clock: TriggerSampleClock,
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}
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impl Delay {
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pub fn new(_nid: &NodeId) -> Self {
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Self {
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buffer: Box::new(DelayBuffer::new()),
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clock: TriggerSampleClock::new(),
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}
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}
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pub const inp : &'static str =
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"Delay inp\nThe signal input for the delay. You can mix in this \
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input to the output with the 'mix' parameter.\nRange: (-1..1)";
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pub const trig : &'static str =
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"Delay trig\nIf you set 'mode' to 'Sync', the delay time will be \
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synchronized to the trigger signals received on this input.\nRange: (-1..1)";
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pub const time : &'static str =
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"Delay time\nThe delay time. It can be freely modulated to your \
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likings.\nRange: (0..1)";
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pub const fb : &'static str =
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"Delay fb\nThe feedback amount of the delay output to it's input. \
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\nRange: (-1..1)";
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pub const mix : &'static str =
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"Delay mix\nThe dry/wet mix of the delay.\nRange: (0..1)";
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pub const mode : &'static str =
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"Delay mode\nAllows different operating modes of the delay. \
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'Time' is the default, and means that the 'time' input \
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specifies the delay time. 'Sync' will synchronize the delay time \
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with the trigger signals on the 'trig' input.";
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pub const sig : &'static str =
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"Delay sig\nThe output of the dry/wet mix.\nRange: (-1..1)";
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pub const DESC : &'static str =
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r#"Simple Delay Line
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This is a very simple single buffer delay node.
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It provides an internal feedback and dry/wet mix.
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"#;
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pub const HELP : &'static str =
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r#"Delay - A Simple Delay Line
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This node provides a very simple delay line with the bare minimum of
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parameters. Most importantly a freely modulateable 'time' parameter
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and a feedback 'fb' parameter.
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Via the 'mix' parameter you can mix in the input signal to the output.
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You can use this node to delay any kind of signal, from a simple control
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signal to an audio signal.
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For other kinds of delay/feedback please see also the 'FbWr'/'FbRd' nodes.
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"#;
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}
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impl DspNode for Delay {
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fn outputs() -> usize { 1 }
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fn set_sample_rate(&mut self, srate: f32) {
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self.buffer.set_sample_rate(srate);
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}
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fn reset(&mut self) {
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self.buffer.reset();
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self.clock.reset();
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}
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#[inline]
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fn process<T: NodeAudioContext>(
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&mut self, ctx: &mut T, _ectx: &mut NodeExecContext,
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_nctx: &NodeContext,
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atoms: &[SAtom], inputs: &[ProcBuf],
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outputs: &mut [ProcBuf], ctx_vals: LedPhaseVals)
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{
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use crate::dsp::{at, out, inp, denorm};
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let buffer = &mut *self.buffer;
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let mode = at::Delay::mode(atoms);
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let inp = inp::Delay::inp(inputs);
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let trig = inp::Delay::trig(inputs);
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let time = inp::Delay::time(inputs);
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let fb = inp::Delay::fb(inputs);
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let mix = inp::Delay::mix(inputs);
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let out = out::Delay::sig(outputs);
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if mode.i() == 0 {
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for frame in 0..ctx.nframes() {
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let dry = inp.read(frame);
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let out_sample =
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buffer.cubic_interpolate_at(
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denorm::Delay::time(time, frame));
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buffer.feed(dry + out_sample * denorm::Delay::fb(fb, frame));
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out.write(frame,
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crossfade(dry, out_sample,
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denorm::Delay::mix(mix, frame).clamp(0.0, 1.0)));
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}
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} else {
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for frame in 0..ctx.nframes() {
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let dry = inp.read(frame);
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let clock_samples =
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self.clock.next(denorm::Delay::trig(trig, frame));
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let out_sample = buffer.at(clock_samples as usize);
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buffer.feed(dry + out_sample * denorm::Delay::fb(fb, frame));
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out.write(frame,
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crossfade(dry, out_sample,
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denorm::Delay::mix(mix, frame).clamp(0.0, 1.0)));
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}
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}
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let last_frame = ctx.nframes() - 1;
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ctx_vals[0].set(out.read(last_frame));
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}
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}
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