Struct ScratchPool 

pub struct ScratchPool<const N: usize, const FRAMES: usize> { /* private fields */ }

Pre-allocated buffer pool for intermediate results during audio processing.

Const-constructed, zero-initialized in the data segment. Uses UnsafeCell for interior mutability — safe because WASM is single-threaded.

Each call to buf(frames) returns the next available &mut [f32] of the requested length. The cursor wraps around when all slots are used.

Example

use sesh_sdk::Scratch;

static SCRATCH: Scratch = Scratch::new();

fn process(channels: &mut [&mut [f32]]) {
    let frames = channels[0].len();
    let cutoff = SCRATCH.buf(frames);
    let q = SCRATCH.buf(frames);
    let temp = SCRATCH.buf(frames);
    // ...
}

Implementations

impl<const N: usize, const FRAMES: usize> ScratchPool<N, FRAMES>

pub const fn new() -> Self

pub fn buf(&self, frames: usize) -> &mut [f32]

Get the next scratch buffer, sliced to frames. Wraps when all slots are used.

Trait Implementations

impl<const N: usize, const FRAMES: usize> Sync for ScratchPool<N, FRAMES>