oop

1 files changed, 43 insertions, 0 deletions

diff --git a/src/osc_tri.c b/src/osc_tri.c
index c4a56f5..8d2ef82 100644
--- a/src/osc_tri.c
+++ b/src/osc_tri.c
@@ -28,3 +28,46 @@ osc_tri_next(float f, float offset)
 {
   return osc_next_offset(&OSC_tri, f, offset);
 }
+
+
+static float
+tri_sample(osc_t * osc, float offset)
+{
+  return osc_interpolate(offset,
+                         tri((int)offset),
+                         tri(osc_next_index(osc, offset)));
+}
+
+static float
+tri_next(osc_t * osc, float f, float offset)
+{
+  return osc_next_offset(osc, f, offset);
+}
+
+static const struct osc_ops osc_operations = {
+  .sample = tri_sample,
+  .next = tri_next,
+};
+
+osc_t *
+make_tri(const char * name)
+{
+  osc_t * osc = (osc_t *)malloc(sizeof(osc_t));
+
+  int len = strlen(name);
+  strncpy(osc->name, name, 16);
+  osc->data = NULL;
+  osc->len = 2;
+  osc->start = 0;
+  osc->end = 2;
+  osc->type = WAVE;
+  osc->ops = &osc_operations;
+
+  return osc;
+}
+
+void
+free_tri(osc_t * osc)
+{
+  free(osc);
+}