Trait PluginLogicCore

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pub trait PluginLogicCore<S = f32>: 'staticwhere
    S: Sample,{
    type Params: Params;
    type DspState: Send + 'static;

    const PRESERVE_DSP_STATE: bool = true;

    // Required methods
    fn init(params: &Self::Params, cx: &InitContext) -> Self::DspState;
    fn reset(
        state: &mut Self::DspState,
        params: &Self::Params,
        config: &AudioConfig,
    );
    fn process(
        state: &mut Self::DspState,
        params: &Self::Params,
        buffer: &mut AudioBuffer<'_, S>,
        events: &EventList,
        context: &mut ProcessContext<'_>,
    ) -> ProcessStatus;

    // Provided methods
    fn supports_in_place() -> bool { ... }
    fn bus_layouts() -> Vec<BusLayout> { ... }
    fn save_state(state: &Self::DspState) -> Vec<u8> ⓘ { ... }
    fn snapshot_into(state: &Self::DspState, buf: &mut Vec<u8>) -> bool { ... }
    fn load_state(
        state: &mut Self::DspState,
        data: &[u8],
    ) -> Result<(), StateLoadError> { ... }
    fn migrate_state(foreign: &ForeignState<'_>) -> Option<MigratedState> { ... }
    fn state_changed(state: &mut Self::DspState, params: &Self::Params) { ... }
    fn latency(state: &Self::DspState) -> u32 { ... }
    fn tail(state: &Self::DspState) -> u32 { ... }
}

Expand description

Wrapper-facing plugin trait, generic over the audio sample type.

Format wrappers (StaticShell, HotShell, CLAP / VST3 / etc.) bind on PluginLogicCore<S>. Plugin authors don’t implement this directly - they implement PluginLogic (f32) or PluginLogic64 (f64), and the blanket impls below route them into PluginLogicCore.

Method docs live on the leaf traits (PluginLogic / PluginLogic64); the shape mirrors them exactly.

Provided Associated Constants§

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const PRESERVE_DSP_STATE: bool = true

Whether the hot-reload shell may preserve live DSP state across a code-only reload. Default true (best-effort layout probe). Override to false on a state that must always re-init on reload.

Required Associated Types§

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type Params: Params

The plugin’s parameter struct; mirrors the leaf’s Params.

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type DspState: Send + 'static

The mutable per-block audio state. Owned by the shell, not by Self (the descriptor). Send because the shell moves it across threads; 'static because the shell may outlive any borrow. No layout trait is required: the hot-reload shell fingerprints the type at load time from its type_name / size_of / align_of.