#include "ringbuf.h"

void ringbuf_init(ringbuf_t *rb) {
    rb->head = 0;
    for (int i = 0; i < RINGBUF_SIZE; i++) {
        rb->values[i].ts_ms = 0;
        rb->values[i].value = 0;
    }
}

void ringbuf_push(ringbuf_t *rb, uint32_t ts_ms, int v) {
    rb->values[rb->head].ts_ms = ts_ms;
    rb->values[rb->head].value = v;
    rb->head = (rb->head + 1) % RINGBUF_SIZE;
}

void ringbuf_copy(const ringbuf_t *rb, sample_t *out) {
    int idx = rb->head;

    for (int i = 0; i < RINGBUF_SIZE; i++) {
        out[i] = rb->values[(idx + i) % RINGBUF_SIZE];
    }
}