of course

lib/delay.c

@@ -0,0 +1,25 @@
+#include <stdlib.h>
+#include <string.h>
+#include "delay.h"
+
+void init_delay_line(delay_line_t *dl, uint32_t delay_samples) {
+    dl->delay = delay_samples;
+    dl->idx = 0;
+    dl->buffer = calloc(delay_samples, sizeof(float));
+}
+
+float delay_line(delay_line_t *dl, float in) {
+    float out = dl->buffer[dl->idx];   // read delayed sample
+
+    dl->buffer[dl->idx] = in;          // write new input
+
+    dl->idx++;
+    if (dl->idx >= dl->delay) dl->idx = 0;
+
+    return out;
+}
+
+void exit_delay_line(delay_line_t *dl) {
+    if(dl->buffer != NULL) free(dl->buffer);
+    dl->buffer = NULL;
+}