151 lines
4.6 KiB
Rust
151 lines
4.6 KiB
Rust
// Copyright (c) 2021 Weird Constructor <weirdconstructor@gmail.com>
|
|
// This file is a part of HexoDSP. Released under GPL-3.0-or-later.
|
|
// See README.md and COPYING for details.
|
|
|
|
use crate::nodes::{NodeAudioContext, NodeExecContext};
|
|
use crate::dsp::{NodeId, SAtom, ProcBuf, DspNode, LedPhaseVals, NodeContext};
|
|
|
|
/// A simple amplifier
|
|
#[derive(Debug, Clone)]
|
|
pub struct FbWr {
|
|
fb_index: u8,
|
|
}
|
|
|
|
impl FbWr {
|
|
pub fn new(nid: &NodeId) -> Self {
|
|
Self {
|
|
fb_index: nid.instance() as u8,
|
|
}
|
|
}
|
|
pub const inp : &'static str =
|
|
"FbWr inp\nSignal input\nRange: (-1..1)\n";
|
|
|
|
pub const DESC : &'static str =
|
|
"Feedback Delay Writer\n\n\
|
|
HexoSynth does not allow direct feedback cycles in it's graph.\n\
|
|
To make feedback possible anyways the 'FbWr' and 'FbRd' nodes are provided.\n\
|
|
This node allows you to write a signal into the corresponsing signal delay buffer.\n\
|
|
Use 'FbRd' for using the signal.\n\
|
|
The delay is 3.14ms.";
|
|
pub const HELP : &'static str =
|
|
r#"Feedback Delay Writer
|
|
|
|
HexoSynth does not allow direct feedback cycles in it's graph.
|
|
To make feedback possible anyways the 'FbWr' and 'FbRd' nodes are provided.
|
|
This node allows you to send a signal into the corresponsing 'FbWr' signal
|
|
delay.
|
|
|
|
The instance id of the node defines which FbWr and FbRd are connected.
|
|
That means 'FbRd 0' is connected to the corresponding 'FbWr 0'. You can use
|
|
the signal multiple times by connecting the 'FbRd 0' 'sig' port to multiple
|
|
inputs.
|
|
|
|
The delay is always 3.14ms, regardless of the sampling rate the synthesizer
|
|
is running at.
|
|
"#;
|
|
}
|
|
|
|
impl DspNode for FbWr {
|
|
fn outputs() -> usize { 0 }
|
|
|
|
fn set_sample_rate(&mut self, _srate: f32) { }
|
|
fn reset(&mut self) { }
|
|
|
|
#[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::{inp};
|
|
|
|
let inp = inp::FbWr::inp(inputs);
|
|
|
|
for frame in 0..ctx.nframes() {
|
|
ectx.feedback_delay_buffers[self.fb_index as usize]
|
|
.write(inp.read(frame));
|
|
}
|
|
|
|
ctx_vals[0].set(inp.read(ctx.nframes() - 1));
|
|
}
|
|
}
|
|
|
|
|
|
/// A simple amplifier
|
|
#[derive(Debug, Clone)]
|
|
pub struct FbRd {
|
|
fb_index: u8,
|
|
}
|
|
|
|
impl FbRd {
|
|
pub fn new(nid: &NodeId) -> Self {
|
|
Self {
|
|
fb_index: nid.instance() as u8,
|
|
}
|
|
}
|
|
pub const atv : &'static str =
|
|
"FbRd atv\nAttenuate or invert input.\n\
|
|
Use this to adjust the feedback amount.\nRange: (-1..1)\n";
|
|
pub const sig : &'static str =
|
|
"FbRd sig\nFeedback signal output.\nRange: (-1..1)\n";
|
|
|
|
pub const DESC : &'static str =
|
|
"Feedback Delay Reader\n\n\
|
|
HexoSynth does not allow direct feedback cycles in it's graph.\n\
|
|
To make feedback possible anyways the 'FbWr' and 'FbRd' nodes are provided.\n\
|
|
This node allows you to tap into the corresponsing 'FbWr' signal delay \
|
|
for feedback.\n\
|
|
The delay is 3.14ms.";
|
|
pub const HELP : &'static str =
|
|
r#"Feedback Delay Reader
|
|
|
|
HexoSynth does not allow direct feedback cycles in it's graph.
|
|
To make feedback possible anyways the 'FbWr' and 'FbRd' nodes are provided.
|
|
This node allows you to tap into the corresponsing 'FbWr' signal delay for
|
|
feedback.
|
|
|
|
The instance id of the node defines which FbWr and FbRd are connected.
|
|
That means 'FbRd 0' is connected to the corresponding 'FbWr 0'. You can use
|
|
the signal multiple times by connecting the 'FbRd 0' 'sig' port to multiple
|
|
inputs.
|
|
|
|
The delay is always 3.14ms, regardless of the sampling rate the synthesizer
|
|
is running at.
|
|
|
|
The 'atv' parameter is a convenience parameter to allow attenuating or
|
|
even inverting the signal.
|
|
"#;
|
|
}
|
|
|
|
impl DspNode for FbRd {
|
|
fn outputs() -> usize { 1 }
|
|
|
|
fn set_sample_rate(&mut self, _srate: f32) { }
|
|
fn reset(&mut self) { }
|
|
|
|
#[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::{out, inp, denorm};
|
|
|
|
let atv = inp::FbRd::atv(inputs);
|
|
let sig = out::FbRd::sig(outputs);
|
|
|
|
let mut last_val = 0.0;
|
|
for frame in 0..ctx.nframes() {
|
|
last_val =
|
|
ectx.feedback_delay_buffers[self.fb_index as usize]
|
|
.read();
|
|
last_val *= denorm::FbRd::atv(atv, frame);
|
|
sig.write(frame, last_val);
|
|
}
|
|
|
|
ctx_vals[0].set(last_val);
|
|
}
|
|
}
|