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||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index" |
||||||
|
checksum = "f249f06ef7ee334cc3b8ff031bfc11ec99d00f34d86da7498396dc1e3b1498fe" |
||||||
|
dependencies = [ |
||||||
|
"proc-macro2", |
||||||
|
"quote", |
||||||
|
"syn", |
||||||
|
"wasm-bindgen-backend", |
||||||
|
"wasm-bindgen-shared", |
||||||
|
] |
||||||
|
|
||||||
|
[[package]] |
||||||
|
name = "wasm-bindgen-shared" |
||||||
|
version = "0.2.68" |
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index" |
||||||
|
checksum = "1d649a3145108d7d3fbcde896a468d1bd636791823c9921135218ad89be08307" |
||||||
|
|
||||||
|
[[package]] |
||||||
|
name = "web-sys" |
||||||
|
version = "0.3.45" |
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index" |
||||||
|
checksum = "4bf6ef87ad7ae8008e15a355ce696bed26012b7caa21605188cfd8214ab51e2d" |
||||||
|
dependencies = [ |
||||||
|
"js-sys", |
||||||
|
"wasm-bindgen", |
||||||
|
] |
||||||
|
|
||||||
|
[[package]] |
||||||
|
name = "winapi" |
||||||
|
version = "0.3.9" |
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index" |
||||||
|
checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419" |
||||||
|
dependencies = [ |
||||||
|
"winapi-i686-pc-windows-gnu", |
||||||
|
"winapi-x86_64-pc-windows-gnu", |
||||||
|
] |
||||||
|
|
||||||
|
[[package]] |
||||||
|
name = "winapi-i686-pc-windows-gnu" |
||||||
|
version = "0.4.0" |
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index" |
||||||
|
checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6" |
||||||
|
|
||||||
|
[[package]] |
||||||
|
name = "winapi-x86_64-pc-windows-gnu" |
||||||
|
version = "0.4.0" |
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index" |
||||||
|
checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f" |
||||||
@ -0,0 +1,12 @@ |
|||||||
|
[package] |
||||||
|
name = "beeptestrs" |
||||||
|
version = "0.1.0" |
||||||
|
authors = ["Ondřej Hruška <ondra@ondrovo.com>"] |
||||||
|
edition = "2018" |
||||||
|
|
||||||
|
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html |
||||||
|
|
||||||
|
[dependencies] |
||||||
|
cpal = "0.12.1" |
||||||
|
anyhow = "1.0.33" |
||||||
|
parking_lot = "0.11.0" |
||||||
@ -0,0 +1,152 @@ |
|||||||
|
use std::sync::Arc; |
||||||
|
|
||||||
|
use cpal::traits::{DeviceTrait, HostTrait, StreamTrait}; |
||||||
|
use std::ops::{Add, AddAssign, Sub}; |
||||||
|
use parking_lot::RwLock; |
||||||
|
use std::time::Duration; |
||||||
|
use std::thread; |
||||||
|
use cpal::SampleFormat; |
||||||
|
use crate::beep::osc::{Instrument, Oscillator}; |
||||||
|
|
||||||
|
pub mod osc; |
||||||
|
|
||||||
|
struct AudioContext { |
||||||
|
device: cpal::Device, |
||||||
|
sample_format: SampleFormat, |
||||||
|
config: cpal::StreamConfig |
||||||
|
} |
||||||
|
|
||||||
|
fn al_init() -> Result<AudioContext, anyhow::Error> { |
||||||
|
let host = cpal::default_host(); |
||||||
|
|
||||||
|
let device = host.default_output_device() |
||||||
|
.ok_or_else(|| anyhow::anyhow!("No audio output device!"))?; |
||||||
|
|
||||||
|
let config = device.default_output_config()?; |
||||||
|
|
||||||
|
Ok(AudioContext { |
||||||
|
device, |
||||||
|
sample_format: config.sample_format(), |
||||||
|
config: config.into() |
||||||
|
}) |
||||||
|
} |
||||||
|
|
||||||
|
pub fn beep() -> Result<(), anyhow::Error> { |
||||||
|
let ac = al_init()?; |
||||||
|
|
||||||
|
match ac.sample_format { |
||||||
|
cpal::SampleFormat::F32 => run::<f32>(&ac.device, &ac.config.into())?, |
||||||
|
cpal::SampleFormat::I16 => run::<i16>(&ac.device, &ac.config.into())?, |
||||||
|
cpal::SampleFormat::U16 => run::<u16>(&ac.device, &ac.config.into())?, |
||||||
|
} |
||||||
|
|
||||||
|
Ok(()) |
||||||
|
} |
||||||
|
|
||||||
|
|
||||||
|
fn run<T>(device: &cpal::Device, config: &cpal::StreamConfig) -> Result<(), anyhow::Error> |
||||||
|
where |
||||||
|
T: cpal::Sample, |
||||||
|
{ |
||||||
|
let sample_rate = config.sample_rate.0 as f32; |
||||||
|
let channels = config.channels as usize; |
||||||
|
|
||||||
|
println!("SR={}",sample_rate); |
||||||
|
|
||||||
|
// Produce a sinusoid of maximum amplitude.
|
||||||
|
|
||||||
|
let mut ins = Instrument::new(vec![ |
||||||
|
Oscillator::new(440.0, 1.0, sample_rate), |
||||||
|
//Oscillator::new(441.0, 1.0, sample_rate),
|
||||||
|
], sample_rate); |
||||||
|
|
||||||
|
let instrument = Arc::new(parking_lot::RwLock::new(ins)); |
||||||
|
|
||||||
|
let err_fn = |err| eprintln!("an error occurred on stream: {}", err); |
||||||
|
|
||||||
|
let m_instrument = instrument.clone(); |
||||||
|
let stream = device.build_output_stream( |
||||||
|
config, |
||||||
|
move |data: &mut [T], _: &cpal::OutputCallbackInfo| { |
||||||
|
write_data(data, channels, &m_instrument) |
||||||
|
}, |
||||||
|
err_fn, |
||||||
|
)?; |
||||||
|
stream.play()?; |
||||||
|
|
||||||
|
// instrument.write().normalize(false);
|
||||||
|
// instrument.write().set_amp(1.0);
|
||||||
|
// thread::sleep(Duration::from_millis(500));
|
||||||
|
//
|
||||||
|
// instrument.write().set_amp(0.0);
|
||||||
|
// thread::sleep(Duration::from_millis(250));
|
||||||
|
|
||||||
|
instrument.write().set_amp(1.0); |
||||||
|
instrument.write().normalize(true); |
||||||
|
thread::sleep(Duration::from_millis(500)); |
||||||
|
|
||||||
|
instrument.write().set_amp(0.0); |
||||||
|
thread::sleep(Duration::from_millis(250)); |
||||||
|
|
||||||
|
instrument.write().set_amp(0.5); |
||||||
|
thread::sleep(Duration::from_millis(500)); |
||||||
|
|
||||||
|
instrument.write().set_amp(0.0); |
||||||
|
thread::sleep(Duration::from_millis(250)); |
||||||
|
|
||||||
|
instrument.write().fade_amp(1.0, Duration::from_millis(10)); |
||||||
|
instrument.write().waveforms[0].fade_balance(-1.0, Duration::from_millis(10)); |
||||||
|
thread::sleep(Duration::from_millis(500)); |
||||||
|
instrument.write().fade_amp(0.0, Duration::from_millis(10)); |
||||||
|
thread::sleep(Duration::from_millis(500)); |
||||||
|
|
||||||
|
|
||||||
|
/* |
||||||
|
|
||||||
|
//instrument.write().set_amp_fade(0.0, 4.0);
|
||||||
|
|
||||||
|
thread::sleep(Duration::from_millis(1000)); |
||||||
|
instrument.write().waveforms[1].fade_amp(0.0, Duration::from_millis(500)); |
||||||
|
thread::sleep(Duration::from_millis(500)); |
||||||
|
|
||||||
|
instrument.write().waveforms[0].fade_balance(-1.0, Duration::from_millis(1000)); |
||||||
|
thread::sleep(Duration::from_millis(1000)); |
||||||
|
instrument.write().waveforms[0].fade_balance(1.0, Duration::from_millis(2000)); |
||||||
|
instrument.write().waveforms[0].fade_freq(880.0, Duration::from_millis(1000)); |
||||||
|
thread::sleep(Duration::from_millis(2000)); |
||||||
|
instrument.write().waveforms[0].fade_balance(-1.0, Duration::from_millis(1000)); |
||||||
|
instrument.write().waveforms[0].fade_amp(0.0, Duration::from_millis(1000)); |
||||||
|
thread::sleep(Duration::from_millis(1000)); |
||||||
|
*/ |
||||||
|
|
||||||
|
// for _ in 0..10
|
||||||
|
// {
|
||||||
|
// instrument.write().harmonics[0].set_balance_fade(-1.0, 0.1);
|
||||||
|
// thread::sleep(Duration::from_millis(100));
|
||||||
|
// instrument.write().harmonics[0].set_balance_fade(1.0, 0.1);
|
||||||
|
// thread::sleep(Duration::from_millis(100));
|
||||||
|
// }
|
||||||
|
//
|
||||||
|
// instrument.write().harmonics[0].set_balance_fade(0.0, 0.5);
|
||||||
|
// instrument.write().harmonics[0].set_amp_fade(0.0, 0.05);
|
||||||
|
// thread::sleep(Duration::from_millis(200));
|
||||||
|
|
||||||
|
Ok(()) |
||||||
|
} |
||||||
|
|
||||||
|
fn write_data<T>(output: &mut [T], channels: usize, instrument: &Arc<RwLock<Instrument>>) |
||||||
|
where |
||||||
|
T: cpal::Sample, |
||||||
|
{ |
||||||
|
let mut instrument = instrument.write(); |
||||||
|
for frame in output.chunks_mut(channels) { |
||||||
|
let sample = instrument.sample(); |
||||||
|
|
||||||
|
if channels == 1 { |
||||||
|
frame[0] = cpal::Sample::from::<f32>(&((sample.left + sample.right) / 2.0)); |
||||||
|
} else { |
||||||
|
frame[0] = cpal::Sample::from::<f32>(&sample.left); |
||||||
|
frame[1] = cpal::Sample::from::<f32>(&sample.right); |
||||||
|
} |
||||||
|
} |
||||||
|
} |
||||||
@ -0,0 +1,424 @@ |
|||||||
|
use std::ops::{Add, AddAssign, Div, DivAssign, Mul, MulAssign}; |
||||||
|
use std::sync::Arc; |
||||||
|
use std::time::Duration; |
||||||
|
|
||||||
|
use parking_lot::RwLock; |
||||||
|
|
||||||
|
use hack::StableClamp; |
||||||
|
|
||||||
|
mod hack { |
||||||
|
/// Work-around for `f32::clamp()` being unstable
|
||||||
|
pub(super) trait StableClamp { |
||||||
|
fn clamp_(self, min: f32, max: f32) -> f32; |
||||||
|
} |
||||||
|
|
||||||
|
impl StableClamp for f32 { |
||||||
|
fn clamp_(self, min: f32, max: f32) -> f32 { |
||||||
|
assert!(min <= max); |
||||||
|
let mut x = self; |
||||||
|
if x < min { |
||||||
|
x = min; |
||||||
|
} |
||||||
|
if x > max { |
||||||
|
x = max; |
||||||
|
} |
||||||
|
x |
||||||
|
} |
||||||
|
} |
||||||
|
} |
||||||
|
|
||||||
|
/// Value fader
|
||||||
|
#[derive(Clone,Debug)] |
||||||
|
struct Tween { |
||||||
|
/// Actual value
|
||||||
|
actual: f32, |
||||||
|
/// Target value, approached by adding "step" to :actual" every sample
|
||||||
|
target: f32, |
||||||
|
/// Value added to "actual" per sample. None = set to target at the end of a cycle
|
||||||
|
step: Option<f32>, |
||||||
|
// Min value
|
||||||
|
min: f32, |
||||||
|
// Max value
|
||||||
|
max: f32, |
||||||
|
} |
||||||
|
|
||||||
|
/// Scale function amplitude by a gain
|
||||||
|
trait GainScale { |
||||||
|
fn scale_gain(self, gain: f32) -> Self; |
||||||
|
} |
||||||
|
|
||||||
|
impl GainScale for f32 { |
||||||
|
/// Scale by gain 0-1
|
||||||
|
fn scale_gain(self, gain: f32) -> Self { |
||||||
|
// TODO what scaling to use?
|
||||||
|
// self * (1.0 + gain * 9.0).log10()
|
||||||
|
// self * gain.sqrt()
|
||||||
|
self * gain |
||||||
|
} |
||||||
|
} |
||||||
|
|
||||||
|
impl Tween { |
||||||
|
/// Update values for the next sample
|
||||||
|
pub fn tick(&mut self) { |
||||||
|
if let Some(step) = self.step { |
||||||
|
let actual0 = self.actual; |
||||||
|
self.actual += step; |
||||||
|
if (self.target > actual0 && self.target <= self.actual) |
||||||
|
|| (self.target <= actual0 && self.target > self.actual) |
||||||
|
{ |
||||||
|
self.step = None; |
||||||
|
self.actual = self.target; |
||||||
|
} |
||||||
|
} |
||||||
|
} |
||||||
|
|
||||||
|
/// Get actual value
|
||||||
|
pub fn actual(&self) -> f32 { |
||||||
|
self.actual |
||||||
|
} |
||||||
|
|
||||||
|
/// Check if the change from actual to target is scheduled to happen instantly
|
||||||
|
/// at the end of a cycle.
|
||||||
|
pub fn is_change_scheduled_at_crossover(&self) -> bool { |
||||||
|
self.target != self.actual |
||||||
|
&& self.step.is_none() |
||||||
|
} |
||||||
|
|
||||||
|
/// Check if the fading is in progress
|
||||||
|
pub fn is_fading(&self) -> bool { |
||||||
|
self.step.is_some() |
||||||
|
} |
||||||
|
|
||||||
|
/// Schedule change at crossover
|
||||||
|
fn set_at_crossover(&mut self, val: f32) { |
||||||
|
self.target = val.clamp_(self.min, self.max); |
||||||
|
self.step = None; // change at the earliest convenience
|
||||||
|
} |
||||||
|
|
||||||
|
/// Start fading
|
||||||
|
fn fade(&mut self, val: f32, time: Duration, sample_rate: f32) { |
||||||
|
self.target = val.clamp_(self.min, self.max); |
||||||
|
let nsamples = (time.as_secs_f32() * sample_rate).ceil(); |
||||||
|
self.step = Some((self.target - self.actual) / nsamples); |
||||||
|
} |
||||||
|
|
||||||
|
/// Set value immediately
|
||||||
|
fn set_immediate(&mut self, val: f32) { |
||||||
|
self.target = val; |
||||||
|
self.actual = val; |
||||||
|
self.step = None; |
||||||
|
} |
||||||
|
} |
||||||
|
|
||||||
|
#[derive(Clone,Debug)] |
||||||
|
pub struct Oscillator { |
||||||
|
/// Amplitude fader 0..1
|
||||||
|
gain: Tween, |
||||||
|
/// Frequency fader 1..22050
|
||||||
|
freq: Tween, |
||||||
|
/// Balance fader -1..1
|
||||||
|
balance: Tween, |
||||||
|
/// Left channel multiplier
|
||||||
|
gain_left: f32, |
||||||
|
/// Right channel multiplier
|
||||||
|
gain_right: f32, |
||||||
|
/// Sample rate (Hz)
|
||||||
|
sample_rate: f32, |
||||||
|
/// Phase increment per sample
|
||||||
|
phase_step: f32, |
||||||
|
/// Phase 0-TAU
|
||||||
|
phase: f32, |
||||||
|
} |
||||||
|
|
||||||
|
impl Oscillator { |
||||||
|
/// New oscillator with a frequency and amplitude
|
||||||
|
pub fn new(freq: f32, amp: f32, sample_rate : f32) -> Self { |
||||||
|
let mut o = Self { |
||||||
|
gain: Tween { |
||||||
|
actual: amp, |
||||||
|
target: amp, |
||||||
|
min: 0.0, |
||||||
|
max: 1.0, |
||||||
|
step: None |
||||||
|
}, |
||||||
|
freq: Tween { |
||||||
|
actual: freq, |
||||||
|
target: freq, |
||||||
|
min: 1.0, |
||||||
|
max: sample_rate / 2.0, |
||||||
|
step: None |
||||||
|
}, |
||||||
|
balance: Tween { |
||||||
|
actual: 0.0, |
||||||
|
target: 0.0, |
||||||
|
min: -1.0, |
||||||
|
max: 1.0, |
||||||
|
step: None |
||||||
|
}, |
||||||
|
phase_step: 0.0, |
||||||
|
gain_left: 0.0, |
||||||
|
gain_right: 0.0, |
||||||
|
sample_rate, |
||||||
|
phase: 0.0 |
||||||
|
}; |
||||||
|
o.update_step(); |
||||||
|
o.update_gains(1.0); |
||||||
|
o |
||||||
|
} |
||||||
|
|
||||||
|
/// Update the step variable
|
||||||
|
fn update_step(&mut self) { |
||||||
|
self.phase_step = (self.freq.actual / self.sample_rate) * std::f32::consts::TAU; |
||||||
|
} |
||||||
|
|
||||||
|
/// Update the pre-computed channel gain variables
|
||||||
|
fn update_gains(&mut self, gain_scale: f32) { |
||||||
|
let angle = ((1.0 + self.balance.actual) / 2.0) * std::f32::consts::FRAC_PI_2; |
||||||
|
let act = self.gain.actual * gain_scale; |
||||||
|
self.gain_left = act.scale_gain(angle.sin()); |
||||||
|
self.gain_right = act.scale_gain(angle.cos()); |
||||||
|
} |
||||||
|
|
||||||
|
/// Get actual amplitude (0..1)
|
||||||
|
pub fn get_amp(&self) -> f32 { |
||||||
|
self.gain.actual |
||||||
|
} |
||||||
|
|
||||||
|
/// Set amplitude (0..1), change at the end of the current waveform to reduce popping
|
||||||
|
pub fn set_amp(&mut self, amp : f32) { |
||||||
|
self.gain.set_at_crossover(amp); |
||||||
|
} |
||||||
|
|
||||||
|
/// Fade to amplitude (0..1) over a given time
|
||||||
|
pub fn fade_amp(&mut self, amp : f32, time: Duration) { |
||||||
|
self.gain.fade(amp, time, self.sample_rate); |
||||||
|
} |
||||||
|
|
||||||
|
/// Get balance value (-1..1)
|
||||||
|
pub fn get_balance(&self) -> f32 { |
||||||
|
self.balance.actual |
||||||
|
} |
||||||
|
|
||||||
|
/// Set balance (-1..1), change at the end of the current waveform to reduce popping
|
||||||
|
pub fn set_balance(&mut self, balance : f32) { |
||||||
|
self.balance.set_at_crossover(balance); |
||||||
|
} |
||||||
|
|
||||||
|
/// Fade to balance (-1..1) over a given time
|
||||||
|
pub fn fade_balance(&mut self, balance : f32, time: Duration) { |
||||||
|
self.balance.fade(balance, time, self.sample_rate); |
||||||
|
} |
||||||
|
|
||||||
|
/// Get frequency value (1..22050)
|
||||||
|
pub fn get_freq(&self) -> f32 { |
||||||
|
self.freq.actual |
||||||
|
} |
||||||
|
|
||||||
|
/// Set frequency (1..22050), change at the end of the current waveform to reduce popping
|
||||||
|
pub fn set_freq(&mut self, freq : f32) { |
||||||
|
self.freq.set_at_crossover(freq); |
||||||
|
} |
||||||
|
|
||||||
|
/// Fade to frequency (1..22050) over a given time
|
||||||
|
pub fn fade_freq(&mut self, freq : f32, time: Duration) { |
||||||
|
self.freq.fade(freq, time, self.sample_rate); |
||||||
|
} |
||||||
|
|
||||||
|
/// Take a sample. Mutable to update faders.
|
||||||
|
pub fn sample(&mut self, gain_scale: f32) -> StereoSample { |
||||||
|
if self.freq.is_fading() { |
||||||
|
self.freq.tick(); |
||||||
|
self.update_step(); |
||||||
|
} |
||||||
|
|
||||||
|
if self.balance.is_fading() || self.gain.is_fading() { |
||||||
|
self.balance.tick(); |
||||||
|
self.gain.tick(); |
||||||
|
self.update_gains(gain_scale); |
||||||
|
} |
||||||
|
|
||||||
|
let ph0 = self.phase; |
||||||
|
self.phase = (self.phase + self.phase_step) % std::f32::consts::TAU; |
||||||
|
|
||||||
|
// "zero crossing detection"
|
||||||
|
if self.phase < ph0 { |
||||||
|
if self.gain.is_change_scheduled_at_crossover() { |
||||||
|
self.gain.actual = self.gain.target; |
||||||
|
self.update_gains(gain_scale); |
||||||
|
} |
||||||
|
|
||||||
|
if self.balance.is_change_scheduled_at_crossover() { |
||||||
|
self.balance.actual = self.balance.target; |
||||||
|
self.update_gains(gain_scale); |
||||||
|
} |
||||||
|
|
||||||
|
if self.freq.is_change_scheduled_at_crossover() { |
||||||
|
self.freq.actual = self.freq.target; |
||||||
|
} |
||||||
|
} |
||||||
|
|
||||||
|
let y = self.phase.sin() * self.gain.actual; |
||||||
|
|
||||||
|
StereoSample { |
||||||
|
left: self.gain_left * y, |
||||||
|
right: self.gain_right * y, |
||||||
|
} |
||||||
|
} |
||||||
|
} |
||||||
|
|
||||||
|
/// Waveform generator with multiple frequencies / waveforms
|
||||||
|
#[derive(Clone,Debug)] |
||||||
|
pub struct Instrument { |
||||||
|
/// Waveforms to combine to produce the final sound
|
||||||
|
pub waveforms: Vec<Oscillator>, |
||||||
|
/// Normalize the output to produce constant amplitude of 1.0 (instead of clipping)
|
||||||
|
normalize: bool, |
||||||
|
sample_rate : f32, |
||||||
|
master: Tween, |
||||||
|
} |
||||||
|
|
||||||
|
impl Instrument { |
||||||
|
pub fn new(waveforms: Vec<Oscillator>, sample_rate: f32) -> Self { |
||||||
|
let mut o = Self { |
||||||
|
waveforms, |
||||||
|
normalize: false, |
||||||
|
sample_rate, |
||||||
|
master: Tween { |
||||||
|
actual: 1.0, |
||||||
|
target: 1.0, |
||||||
|
step: None, |
||||||
|
min: 0.0, |
||||||
|
max: 1.0 |
||||||
|
} |
||||||
|
}; |
||||||
|
o |
||||||
|
} |
||||||
|
|
||||||
|
pub fn normalize(&mut self, normalize: bool) { |
||||||
|
self.normalize = normalize; |
||||||
|
|
||||||
|
// This is an artifact of how Oscillator works internally:
|
||||||
|
// The left/right gains are pre-computed and updated only when they change
|
||||||
|
if normalize { |
||||||
|
self.force_normalize(); |
||||||
|
} else { |
||||||
|
self.waveforms.iter_mut() |
||||||
|
.for_each(|item| item.update_gains(1.0)); |
||||||
|
} |
||||||
|
} |
||||||
|
|
||||||
|
pub fn get_amp(&self) -> f32 { |
||||||
|
self.master.actual() |
||||||
|
} |
||||||
|
|
||||||
|
pub fn set_amp(&mut self, amp : f32) { |
||||||
|
self.master.set_immediate(amp); |
||||||
|
} |
||||||
|
|
||||||
|
pub fn fade_amp(&mut self, amp : f32, time: Duration) { |
||||||
|
self.master.fade(amp, time, self.sample_rate); |
||||||
|
} |
||||||
|
|
||||||
|
fn force_normalize(&mut self) { |
||||||
|
let gain_scale = 1.0 / self.waveforms.iter() |
||||||
|
.fold((0.0), |acc, item| acc + item.gain.actual); |
||||||
|
|
||||||
|
println!("Gain scale {}", gain_scale); |
||||||
|
self.waveforms.iter_mut() |
||||||
|
.for_each(|item| item.update_gains(gain_scale)); |
||||||
|
} |
||||||
|
|
||||||
|
/// Get a sample (left, right)
|
||||||
|
pub fn sample(&mut self) -> StereoSample { |
||||||
|
self.master.tick(); |
||||||
|
|
||||||
|
let gain_scaling = if self.normalize { |
||||||
|
1.0 / self.waveforms.iter() |
||||||
|
.fold((0.0), |acc, item| acc + item.gain.actual) |
||||||
|
} else { |
||||||
|
1.0 |
||||||
|
}; |
||||||
|
|
||||||
|
let (mut value, gains)= self.waveforms.iter_mut() |
||||||
|
.fold((StereoSample::default(), 0.0), |mut acc, item| { |
||||||
|
acc.0 += item.sample(gain_scaling); |
||||||
|
acc.1 += item.gain.actual; |
||||||
|
acc |
||||||
|
}); |
||||||
|
|
||||||
|
if self.normalize { |
||||||
|
value.left /= gains; |
||||||
|
value.right /= gains; |
||||||
|
} |
||||||
|
|
||||||
|
value.left = value.left.scale_gain(self.master.actual).clamp_(-1.0, 1.0); |
||||||
|
value.right = value.right.scale_gain(self.master.actual).clamp_(-1.0, 1.0); |
||||||
|
value.clip() |
||||||
|
} |
||||||
|
} |
||||||
|
|
||||||
|
#[derive(Default, Clone, Copy)] |
||||||
|
pub struct StereoSample { |
||||||
|
pub left: f32, |
||||||
|
pub right: f32, |
||||||
|
} |
||||||
|
|
||||||
|
impl StereoSample { |
||||||
|
pub fn clip(self) -> Self { |
||||||
|
Self { |
||||||
|
left: self.left.clamp_(-1.0, 1.0), |
||||||
|
right: self.right.clamp_(-1.0, 1.0), |
||||||
|
} |
||||||
|
} |
||||||
|
} |
||||||
|
|
||||||
|
impl Add for StereoSample { |
||||||
|
type Output = Self; |
||||||
|
|
||||||
|
fn add(self, rhs: Self) -> Self::Output { |
||||||
|
Self { |
||||||
|
left: self.left + rhs.left, |
||||||
|
right: self.right + rhs.right, |
||||||
|
} |
||||||
|
} |
||||||
|
} |
||||||
|
|
||||||
|
impl Div<f32> for StereoSample { |
||||||
|
type Output = Self; |
||||||
|
|
||||||
|
fn div(self, rhs: f32) -> Self::Output { |
||||||
|
Self { |
||||||
|
left: self.left / rhs, |
||||||
|
right: self.right / rhs, |
||||||
|
} |
||||||
|
} |
||||||
|
} |
||||||
|
|
||||||
|
impl Mul<f32> for StereoSample { |
||||||
|
type Output = Self; |
||||||
|
|
||||||
|
fn mul(self, rhs: f32) -> Self::Output { |
||||||
|
Self { |
||||||
|
left: self.left * rhs, |
||||||
|
right: self.right * rhs, |
||||||
|
} |
||||||
|
} |
||||||
|
} |
||||||
|
|
||||||
|
impl AddAssign<Self> for StereoSample { |
||||||
|
fn add_assign(&mut self, rhs: Self) { |
||||||
|
*self = *self + rhs |
||||||
|
} |
||||||
|
} |
||||||
|
|
||||||
|
impl DivAssign<f32> for StereoSample { |
||||||
|
fn div_assign(&mut self, rhs: f32) { |
||||||
|
*self = *self / rhs |
||||||
|
} |
||||||
|
} |
||||||
|
|
||||||
|
impl MulAssign<f32> for StereoSample { |
||||||
|
fn mul_assign(&mut self, rhs: f32) { |
||||||
|
*self = *self * rhs |
||||||
|
} |
||||||
|
} |
||||||
@ -0,0 +1,7 @@ |
|||||||
|
mod beep; |
||||||
|
extern crate anyhow; |
||||||
|
extern crate cpal; |
||||||
|
|
||||||
|
fn main() -> Result<(), anyhow::Error> { |
||||||
|
beep::beep() |
||||||
|
} |
||||||
Loading…
Reference in new issue