HexoDSP/src/dsp/node_sampl.rs

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// 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;
use crate::dsp::{SAtom, ProcBuf, DspNode, LedPhaseVals};
/// A simple amplifier
#[derive(Debug, Clone)]
pub struct Sampl {
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sample_idx: usize,
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}
impl Sampl {
pub fn new() -> Self {
Self {
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sample_idx: 0,
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}
}
pub const freq : &'static str =
"Sampl freq\nPitch input for the sampler, giving the playback speed of the\
sample.\nRange: (-1..1)\n";
pub const sample : &'static str =
"Sampl sample\nThe audio sample that is played back.\nRange: (-1..1)\n";
pub const sig : &'static str =
"Sampl sig\nSampler audio output\nRange: (-1..1)\n";
}
impl DspNode for Sampl {
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, atoms: &[SAtom], _params: &[ProcBuf],
inputs: &[ProcBuf], outputs: &mut [ProcBuf], ctx_vals: LedPhaseVals)
{
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use crate::dsp::{out, at, inp, denorm}; //, inp, denorm, denorm_v, inp_dir, at};
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let sample = at::Sampl::sample(atoms);
let freq = inp::Sampl::freq(inputs);
let out = out::Sampl::sig(outputs);
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if let SAtom::AudioSample((_, Some(sample_data))) = sample {
let sd_len = sample_data.len() - 1;
for frame in 0..ctx.nframes() {
let speed = denorm::Sampl::freq(freq, frame) / 440.0;
let sd = sample_data[self.sample_idx % sd_len + 1];
out.write(frame, sd);
self.sample_idx += (1.0 * speed).ceil() as usize;
}
} else {
for frame in 0..ctx.nframes() {
out.write(frame, 0.0);
}
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}
ctx_vals[0].set(1.0);
// let neg = at::Amp::neg_att(atoms);
//
// let last_frame = ctx.nframes() - 1;
//
// let last_val =
// if neg.i() > 0 {
// for frame in 0..ctx.nframes() {
// out.write(frame,
// inp.read(frame)
// * denorm_v::Amp::att(
// inp_dir::Amp::att(att, frame)
// .max(0.0))
// * denorm::Amp::gain(gain, frame));
// }
//
// inp.read(last_frame)
// * denorm_v::Amp::att(
// inp_dir::Amp::att(att, last_frame)
// .max(0.0))
// * denorm::Amp::gain(gain, last_frame)
//
// } else {
// for frame in 0..ctx.nframes() {
// out.write(frame,
// inp.read(frame)
// * denorm_v::Amp::att(
// inp_dir::Amp::att(att, frame).abs())
// * denorm::Amp::gain(gain, frame));
// }
//
// inp.read(last_frame)
// * denorm_v::Amp::att(
// inp_dir::Amp::att(att, last_frame).abs())
// * denorm::Amp::gain(gain, last_frame)
// };
}
}