Struct SetupContext 

pub struct SetupContext {
    pub channels: usize,
    pub sample_rate: f64,
    pub block_size: usize,
}

Context passed to the PluginDriver::setup closure. Carries the driver state that’s been resolved by the time setup runs - in particular the auto-detected channel count, which would otherwise be invisible to the closure (the user’s &mut P doesn’t know).

Test code that needs to size scratch buffers, validate bus layouts, or branch on stereo-vs-mono before the first process block reads these fields directly:

PluginDriver::<MyPlugin>::new()
    .setup(|plugin, ctx| {
        assert_eq!(ctx.channels, 2, "stereo run expected");
        plugin.scratch = vec![0.0; ctx.block_size * ctx.channels];
    })
    .run();

Fields

channels: usize

Channels per audio bus that the driver will run with. Either the value passed to PluginDriver::channels or the auto-resolved default from P::bus_layouts()[0].

sample_rate: f64

Sample rate the upcoming process loop will use.

block_size: usize

Block size the upcoming process loop will use.

Trait Implementations

impl Clone for SetupContext

fn clone(&self) -> SetupContext

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for SetupContext

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Copy for SetupContext