111 lines
3.4 KiB
Rust
111 lines
3.4 KiB
Rust
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// Safety limiter: ear protection for the 21st century
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// Copyright (C) 2022 Robbert van der Helm
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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use nih_plug::prelude::*;
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use std::sync::Arc;
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struct SafetyLimiter {
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params: Arc<SafetyLimiterParams>,
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}
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#[derive(Params)]
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struct SafetyLimiterParams {
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/// The level at which to start engaging the safety limiter. Stored as a gain ratio instead of
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/// decibels.
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#[id = "threshold"]
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threshold_gain: FloatParam,
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}
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impl Default for SafetyLimiterParams {
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fn default() -> Self {
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Self {
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threshold_gain: FloatParam::new(
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"Threshold",
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util::db_to_gain(0.00),
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// This parameter mostly exists to allow small peaks through, so no need to go below
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// 0 dBFS
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FloatRange::Linear {
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min: util::db_to_gain(0.0),
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max: util::db_to_gain(12.0),
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},
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)
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// And smoothing is not necessary here since we'll disable automation
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.non_automatable()
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.with_unit(" dB")
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.with_value_to_string(formatters::v2s_f32_gain_to_db(2))
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.with_string_to_value(formatters::s2v_f32_gain_to_db()),
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}
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}
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}
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impl Default for SafetyLimiter {
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fn default() -> Self {
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SafetyLimiter {
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params: Arc::new(SafetyLimiterParams::default()),
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}
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}
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}
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impl Plugin for SafetyLimiter {
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const NAME: &'static str = "Safety Limiter";
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const VENDOR: &'static str = "Robbert van der Helm";
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const URL: &'static str = "https://github.com/robbert-vdh/nih-plug";
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const EMAIL: &'static str = "mail@robbertvanderhelm.nl";
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const VERSION: &'static str = "0.1.0";
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const DEFAULT_NUM_INPUTS: u32 = 2;
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const DEFAULT_NUM_OUTPUTS: u32 = 2;
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fn params(&self) -> Arc<dyn Params> {
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self.params.clone()
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}
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fn accepts_bus_config(&self, config: &BusConfig) -> bool {
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config.num_input_channels == config.num_output_channels
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}
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fn reset(&mut self) {
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// TODO: Reset counters
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}
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fn process(
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&mut self,
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buffer: &mut Buffer,
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_context: &mut impl ProcessContext,
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) -> ProcessStatus {
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// TODO: Dew it
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ProcessStatus::Normal
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}
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}
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impl ClapPlugin for SafetyLimiter {
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const CLAP_ID: &'static str = "nl.robbertvanderhelm.safety-limiter";
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const CLAP_DESCRIPTION: &'static str = "Plays SOS in Morse code when redlining";
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const CLAP_FEATURES: &'static [&'static str] = &["audio_effect", "stereo", "utility"];
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const CLAP_MANUAL_URL: &'static str = Self::URL;
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const CLAP_SUPPORT_URL: &'static str = Self::URL;
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}
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impl Vst3Plugin for SafetyLimiter {
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const VST3_CLASS_ID: [u8; 16] = *b"SafetyLimtrRvdH.";
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const VST3_CATEGORIES: &'static str = "Fx|Tools";
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}
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nih_export_clap!(SafetyLimiter);
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nih_export_vst3!(SafetyLimiter);
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