nih-plug/plugins/diopser/src/lib.rs

// Diopser: a phase rotation plugin
// Copyright (C) 2021-2022 Robbert van der Helm
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.

#[macro_use]
extern crate nih_plug;

use nih_plug::Params;
use nih_plug::{
    Buffer, BufferConfig, BusConfig, Plugin, ProcessContext, ProcessStatus, Vst3Plugin,
};
use std::pin::Pin;

struct Diopser {
    params: Pin<Box<DiopserParams>>,
}

#[derive(Params)]
struct DiopserParams {}

impl Default for Diopser {
    fn default() -> Self {
        Self {
            params: Box::pin(DiopserParams::default()),
        }
    }
}

impl Default for DiopserParams {
    fn default() -> Self {
        Self {}
    }
}

impl Plugin for Diopser {
    const NAME: &'static str = "Diopser";
    const VENDOR: &'static str = "Robbert van der Helm";
    const URL: &'static str = "https://github.com/robbert-vdh/nih-plug";
    const EMAIL: &'static str = "mail@robbertvanderhelm.nl";

    const VERSION: &'static str = "0.2.0";

    const DEFAULT_NUM_INPUTS: u32 = 2;
    const DEFAULT_NUM_OUTPUTS: u32 = 2;

    fn params(&self) -> Pin<&dyn Params> {
        self.params.as_ref()
    }

    fn accepts_bus_config(&self, config: &BusConfig) -> bool {
        // This works with any symmetrical IO layout
        config.num_input_channels == config.num_output_channels && config.num_input_channels > 0
    }

    fn initialize(
        &mut self,
        _bus_config: &BusConfig,
        _buffer_config: &BufferConfig,
        _context: &mut impl ProcessContext,
    ) -> bool {
        true
    }

    fn process(
        &mut self,
        _buffer: &mut Buffer,
        _context: &mut impl ProcessContext,
    ) -> ProcessStatus {
        ProcessStatus::Normal
    }
}

impl Vst3Plugin for Diopser {
    const VST3_CLASS_ID: [u8; 16] = *b"DiopserPlugRvdH.";
    const VST3_CATEGORIES: &'static str = "Fx|Filter";
}

nih_export_vst3!(Diopser);