32 lines
766 B
C
32 lines
766 B
C
#include <stdint.h>
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#include <stddef.h>
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#include <stdlib.h>
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#include "delay.h"
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void delay_init(
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struct delay * delay
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) {
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delay->duration = 15000;
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delay->mix = 0.8;
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delay->feedback = 0.6;
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delay->buf_idx = 0;
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delay->buf = calloc( delay->duration, sizeof(float) );
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}
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void delay_process(
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struct delay * delay,
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size_t frame_size,
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float const * in,
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float * out
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) {
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for( size_t i = 0; i < frame_size; ++i ) {
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out[i] =
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(1.0 - delay->mix) * in[i]
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+ delay->mix * delay->buf[ delay->buf_idx ];
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delay->buf[ delay->buf_idx ] *= delay->feedback;
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delay->buf[ delay->buf_idx ] += (1.0 - delay->feedback) * in[i];
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delay->buf_idx = (delay->buf_idx + 1) % delay->duration;
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}
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}
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