unnieversal/crates/baseplug/examples/gain.rs

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#![allow(incomplete_features)]
#![feature(generic_associated_types)]
use serde::{Serialize, Deserialize};
use baseplug::{
ProcessContext,
Plugin,
};
baseplug::model! {
#[derive(Debug, Serialize, Deserialize)]
struct GainModel {
#[model(min = -90.0, max = 3.0)]
#[parameter(name = "gain", unit = "Decibels",
gradient = "Power(0.15)")]
gain: f32
}
}
impl Default for GainModel {
fn default() -> Self {
Self {
// "gain" is converted from dB to coefficient in the parameter handling code,
// so in the model here it's a coeff.
// -0dB == 1.0
gain: 1.0
}
}
}
struct Gain;
impl Plugin for Gain {
const NAME: &'static str = "basic gain plug";
const PRODUCT: &'static str = "basic gain plug";
const VENDOR: &'static str = "spicy plugins & co";
const INPUT_CHANNELS: usize = 2;
const OUTPUT_CHANNELS: usize = 2;
type Model = GainModel;
#[inline]
fn new(_sample_rate: f32, _model: &GainModel) -> Self {
Self
}
#[inline]
fn process(&mut self, model: &GainModelProcess, ctx: &mut ProcessContext<Self>) {
let input = &ctx.inputs[0].buffers;
let output = &mut ctx.outputs[0].buffers;
for i in 0..ctx.nframes {
output[0][i] = input[0][i] * model.gain[i];
output[1][i] = input[1][i] * model.gain[i];
}
}
}
baseplug::vst2!(Gain, b"tAnE");