Struct InMemoryParameterHost 

pub struct InMemoryParameterHost { /* private fields */ }

In-memory host for storing parameter values and optional meter data.

This is intended for development tools (like the CLI dev server) and tests.

Implementations

impl InMemoryParameterHost

pub fn new(parameters: Vec<ParameterInfo>) -> Self

Create a new in-memory host with the given parameter metadata.

pub fn with_meter_provider( parameters: Vec<ParameterInfo>, meter_provider: Arc<dyn MeterProvider>, ) -> Self

Create a new in-memory host with a meter provider.

pub fn replace_parameters( &self, new_params: Vec<ParameterInfo>, ) -> Result<(), String>

Replace all parameters with new metadata from a fresh build.

This method is used during hot-reload to update parameter definitions while preserving existing parameter values where possible. Parameters with matching IDs retain their current values; new parameters get their default values; removed parameters are dropped.

Thread Safety

This method acquires write locks on both the parameters and values maps. If a lock is poisoned (from a previous panic), it recovers gracefully by clearing the poisoned lock and continuing.

Errors

Returns an error if both lock recovery attempts fail.

Trait Implementations

impl ParameterHost for InMemoryParameterHost

fn get_parameter(&self, id: &str) -> Option<ParameterInfo>

Get information about a single parameter.

fn set_parameter(&self, id: &str, value: f32) -> Result<(), BridgeError>

Set a parameter value.

fn get_all_parameters(&self) -> Vec<ParameterInfo>

Get all parameters with their current values and metadata.

fn get_meter_frame(&self) -> Option<MeterFrame>

Get the latest meter frame for UI visualization.

fn request_resize(&self, _width: u32, _height: u32) -> bool

Request resize of the editor window.

fn get_audio_status(&self) -> Option<AudioRuntimeStatus>

Get the current audio runtime status for browser/dev hosts.