1 files changed, 49 insertions, 0 deletions
diff --git a/mod/map.h b/mod/map.h
new file mode 100644
index 0000000..c56487e
--- /dev/null
+++ b/mod/map.h
@@ -0,0 +1,49 @@
+/*
+ * melisma - extensible and scriptable audio engine
+ * Copyright (C) 2026  Ludvig Gunne Lindström
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef MAP_H
+#define MAP_H
+
+#include "melisma.h"
+#include <lauxlib.h>
+
+struct map
+{
+	float value;
+	int   channel;
+};
+
+static void map_from_arg(lua_State *s, struct map *m, int arg)
+{
+	if (lua_isnumber(s,arg))
+	{
+	}
+
+	if (lua_isuserdata(s,arg))
+	{
+	}
+
+	luaL_argerror(s,arg,"expected number or output channel");
+}
+
+static float map_get(struct map *m, size_t i, const ml_proc_args *args)
+{
+	return m->channel >= 0 ? args->in[m->channel][i] : m->value;
+}
+
+#endif