sust wip

sust.h

@@ -0,0 +1,30 @@
+#pragma once
+
+#include <stdbool.h>
+#include <stddef.h>
+
+enum sust_mode {
+    MODE_Sustain,
+    MODE_Sostenuto
+};
+
+struct sust {
+    enum sust_mode mode;
+    bool recording;
+    bool playing;
+
+    size_t idx;
+    float * buf;
+};
+
+
+void sust_init(
+    struct sust * sust
+);
+
+void sust_process(
+    struct sust * sust,
+    size_t frame_size,
+    float const * in,
+    float * out
+);