nih-plug/src/wrapper/standalone/backend.rs

pub use self::dummy::Dummy;
pub use self::jack::Jack;
pub use crate::buffer::Buffer;
use crate::midi::NoteEvent;

mod dummy;
mod jack;

/// An audio+MIDI backend for the standalone wrapper.
pub trait Backend: 'static + Send + Sync {
    /// Start processing audio and MIDI on this thread. The process callback will be called whenever
    /// there's a new block of audio to be processed. The process callback receives the audio
    /// buffers for the wrapped plugin's outputs. Any inputs will have already been copied to this
    /// buffer. This will block until the process callback returns `false`.
    ///
    /// TODO: Auxiliary inputs and outputs
    fn run(
        &mut self,
        cb: impl FnMut(&mut Buffer, &[NoteEvent], &mut Vec<NoteEvent>) -> bool + 'static + Send,
    );
}