1 files changed, 22 insertions, 0 deletions
diff --git a/src/osc_sin.c b/src/osc_sin.c
new file mode 100644
index 0000000..66478d2
--- /dev/null
+++ b/src/osc_sin.c
@@ -0,0 +1,22 @@
+#include "osc.h"
+
+osc_t OSC_sin = {
+  .name = "f_sin",
+  .len = 20000,
+  .start = 0,
+  .end = 20000,
+};
+
+float
+osc_sin(float offset)
+{
+  return osc_interpolate(offset,
+                         sin(2 * M_PI * (int)offset / OSC_sin.len),
+                         sin(2 * M_PI * osc_next_index(&OSC_sin, offset) / OSC_sin.len));
+}
+
+float
+osc_sin_next(float f, float offset)
+{
+  return osc_next_offset(&OSC_sin, f, offset);
+}