Closes #10

core/multiplexing.h

@@ -0,0 +1,19 @@
+// SPDX-License-Identifier: MIT
+#ifndef MULTIPLEXING_H
+#define MULTIPLEXING_H
+
+#include <cstdint>
+
+enum class MultiplexRole {
+    Unconditional,
+    Selector,
+    Branch
+};
+
+/** Basic multiplexing: one unsigned selector per frame, one raw value per branch. */
+struct Multiplexing {
+    MultiplexRole role = MultiplexRole::Unconditional;
+    std::uint64_t value = 0U;
+};
+
+#endif