guitfx/delay.h

#pragma once

#include <stddef.h>
#include <stdint.h>

struct delay {
    uint64_t duration;
    float feedback;
    float mix;

    uint64_t buf_idx;
    size_t buf_capacity;
    float* buf;
};

void delay_init(
    struct delay* delay);

void delay_set_time(
    struct delay* delay,
    uint64_t new_duration);

void delay_process(
    struct delay* delay,
    size_t frame_size,
    float const* in,
    float* out);