104 lines
3.5 KiB
Rust
104 lines
3.5 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 synfx_dsp::{ChangeTrig, Quantizer};
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use crate::dsp::{DspNode, LedPhaseVals, NodeContext, NodeId, ProcBuf, SAtom};
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use crate::nodes::{NodeAudioContext, NodeExecContext};
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#[macro_export]
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macro_rules! fa_quant {
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($formatter: expr, $v: expr, $denorm_v: expr) => {{
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write!($formatter, "?")
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}};
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}
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/// A pitch quantizer
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#[derive(Debug, Clone)]
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pub struct Quant {
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quant: Box<Quantizer>,
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change_trig: ChangeTrig,
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}
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impl Quant {
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pub fn new(_nid: &NodeId) -> Self {
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Self { quant: Box::new(Quantizer::new()), change_trig: ChangeTrig::new() }
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}
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pub const freq: &'static str =
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"Quant freq\nAny signal that is to be pitch quantized.\nRange: (-1..1)";
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pub const oct: &'static str =
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"Quant oct\nPitch offset, the knob is snapping to octave offsets. \
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Feed signal values snapped to 0.1 multiples for exact octave offsets.\
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\nRange: (-1..1)";
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pub const sig: &'static str = "Quant sig\nThe quantized output signal that is rounded to \
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the next selected note pitch within the octave of the \
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original input to 'freq'.\nRange: (-1..1)";
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pub const keys: &'static str = "Quant keys\nSelect the notes you want to snap to here. \
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If no notes are selected, the quantizer will snap the \
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incoming signal to any closest note.";
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pub const t: &'static str = "Quant t\nEverytime the quantizer snaps to a new pitch, it will \
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emit a short trigger on this signal output. This is useful \
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to trigger for example an envelope.";
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pub const DESC: &'static str = r#"Pitch Quantizer
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This is a simple quantizer, that snaps a pitch signal on 'freq' to the closest selected notes within their octave.
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"#;
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pub const HELP: &'static str = r#"Quant - A pitch quantizer
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This is a simple quantizer, that snaps a pitch signal on 'freq' to the
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closest selected notes within their octave.
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If you sweep along pitches you will notice that notes that are closer together
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are travelled across faster. That means the notes are not evenly distributed
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across the pitch input. If you want a more evenly distributed pitch selection
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please see also the 'CQnt' node.
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"#;
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}
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impl DspNode for Quant {
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fn outputs() -> usize {
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1
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}
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fn set_sample_rate(&mut self, srate: f32) {
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self.change_trig.set_sample_rate(srate);
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}
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fn reset(&mut self) {
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self.change_trig.reset();
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}
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#[inline]
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fn process<T: NodeAudioContext>(
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&mut self,
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ctx: &mut T,
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_ectx: &mut NodeExecContext,
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_nctx: &NodeContext,
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atoms: &[SAtom],
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inputs: &[ProcBuf],
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outputs: &mut [ProcBuf],
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ctx_vals: LedPhaseVals,
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) {
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use crate::dsp::{at, denorm, inp, out_buf};
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let freq = inp::Quant::freq(inputs);
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let oct = inp::Quant::oct(inputs);
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let keys = at::Quant::keys(atoms);
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let mut out = out_buf::CQnt::sig(outputs);
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let mut t = out_buf::CQnt::t(outputs);
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self.quant.set_keys(keys.i());
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for frame in 0..ctx.nframes() {
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let pitch = self.quant.process(freq.read(frame));
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t.write(frame, self.change_trig.next(pitch));
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out.write(frame, pitch + denorm::Quant::oct(oct, frame));
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}
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let last_pitch = self.quant.last_key_pitch();
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ctx_vals[1].set(last_pitch * 10.0 + 0.0001);
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ctx_vals[0].set((last_pitch * 10.0 - 0.5) * 2.0);
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}
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}
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