Crate prime_render 

prime-render — Pure sample-level scan loop.

This is the ADVANCE evaluator for the temporal assembly thesis. A rendered buffer is the result of folding a pure step function over time:

output[n] = f(state_n, t_n)   where   state_{n+1} = step(state_n, t_n).sample_rate

render is the only place in PRIME where ADVANCE is the explicit design. Everything else in PRIME is LOAD + COMPUTE (single-step). Here we fold N steps.

Temporal Assembly in PRIME

LOAD    ← initial_state, sample_rate, num_samples, step fn
COMPUTE ← fold: (state, sample_index) → (sample, next_state)
APPEND  ← push each sample into the output buffer
ADVANCE ← repeat for every sample — this is the scan loop

The step function is always LOAD + COMPUTE only. It never calls render recursively, never mutates, never reads the clock. Same inputs → same output.

Functions

render

Render a mono audio buffer by folding a pure step function over time.

render_fold

Render a buffer and reduce it to a scalar — useful for envelope integration and level metering without allocating the full output.

render_stereo

Render a stereo audio buffer by folding a pure step function over time.