--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ft16/submux.h	Thu Aug 29 13:07:16 2024 +0000
@@ -0,0 +1,29 @@
+/*
+ * The structures and functions defined in this header file deal with
+ * submultiplexing on the Abis interface.
+ */
+
+#pragma once
+
+#include <stdint.h>
+#include <stdbool.h>
+
+#include <osmocom/core/bits.h>
+#include <osmocom/core/fsm.h>
+#include <osmocom/isdn/i460_mux.h>
+
+#define	ABIS_SUBSLOTS	4
+
+struct abis_subslot {
+	struct osmo_i460_subchan *schan;
+	struct osmo_fsm_inst *sync;
+	int nr;
+	bool got_sync;
+	uint8_t frame_type;
+};
+
+extern struct abis_subslot subslots[ABIS_SUBSLOTS];
+
+void i460_rx_func(struct osmo_i460_subchan *schan, void *user_data,
+		  const ubit_t *bits, unsigned int num_bits);
+void sync_rx_func(void *user_data, const ubit_t *bits, unsigned int num_bits);