136 lines
4.4 KiB
Rust
136 lines
4.4 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, CtrlPitchQuantizer};
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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_cqnt {
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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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#[macro_export]
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macro_rules! fa_cqnt_omin {
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($formatter: expr, $v: expr, $denorm_v: expr) => {{
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let s = match ($v.round() as usize) {
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0 => "-0",
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1 => "-1",
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2 => "-2",
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3 => "-3",
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4 => "-4",
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_ => "?",
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};
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write!($formatter, "{}", s)
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}};
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}
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#[macro_export]
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macro_rules! fa_cqnt_omax {
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($formatter: expr, $v: expr, $denorm_v: expr) => {{
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let s = match ($v.round() as usize) {
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0 => "+0",
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1 => "+1",
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2 => "+2",
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3 => "+3",
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4 => "+4",
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_ => "?",
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};
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write!($formatter, "{}", s)
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}};
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}
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/// A control signal to pitch quantizer/converter
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#[derive(Debug, Clone)]
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pub struct CQnt {
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quant: Box<CtrlPitchQuantizer>,
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change_trig: ChangeTrig,
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}
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impl CQnt {
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pub fn new(_nid: &NodeId) -> Self {
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Self { quant: Box::new(CtrlPitchQuantizer::new()), change_trig: ChangeTrig::new() }
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}
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pub const inp: &'static str =
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"CQnt inp\nThe unipolar input signal that is to be mapped to the \
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selected pitch range.\nRange: (0..1)";
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pub const oct: &'static str = "CQnt oct\nThe octave offset from A4.\nRange: (-1..1)";
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pub const omin: &'static str =
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"CQnt omin\nThe minimum octave of the range. If 0 it will be 'oct'.\nRange: (-1..1)";
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pub const omax: &'static str =
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"CQnt omax\nThe maximum octave of the range. If 0 it will be 'oct'.\nRange: (-1..1)";
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pub const sig: &'static str = "CQnt sig\nThe output pitch signal.\nRange: (-1..1)";
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pub const t: &'static str = "CQnt 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 keys: &'static str =
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"CQnt keys\nHere you can select the individual notes of the range. \
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If no note is selected, it's the same as if all notes were selected.";
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pub const DESC: &'static str = r#"Ctrl Pitch Quantizer
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This special quantizer maps the unipolar 0..1 control signal input range on 'inp' evenly to the selected keys and octaves.
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"#;
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pub const HELP: &'static str = r#"CQnt - A control signal to pitch quantizer
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This is a specialized control signal quantizer to generate a pitch/frequency
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from a signal within the 0..1 range. It does not quantize a typical -1..1
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frequency signal like the 'Quant' node.
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In contrast to 'Quant', this quantizer maps the incoming signal evenly
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to the available note range. It will result in more evenly played notes
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if you sweep accross the input signal range.
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"#;
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}
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impl DspNode for CQnt {
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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 inp = inp::CQnt::inp(inputs);
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let oct = inp::CQnt::oct(inputs);
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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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let keys = at::CQnt::keys(atoms);
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let omin = at::CQnt::omin(atoms);
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let omax = at::CQnt::omax(atoms);
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self.quant.update_keys(keys.i(), omin.i(), omax.i());
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for frame in 0..ctx.nframes() {
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let pitch = self.quant.signal_to_pitch(denorm::CQnt::inp(inp, frame));
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t.write(frame, self.change_trig.next(pitch));
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out.write(frame, pitch + denorm::CQnt::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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