+/*
+  oslec.h
+  David Rowe
+  7 Feb 2007
+
+  Interface for OSLEC module.
+*/
+
+#ifndef __OSLEC__
+#define __OSLEC__
+
+#define ZAPTEL_ECHO_CANCELLER "OSLEC"
+static inline void echo_can_identify(char *buf, size_t len)
+{
+strncpy(buf, ZAPTEL_ECHO_CANCELLER, len);
+};
+
+struct echo_can_state {
+  void *ec;
+};
+
+struct echo_can_state *oslec_echo_can_create(int len, int adaption_mode);
+void oslec_echo_can_free(struct echo_can_state *ec);
+short oslec_echo_can_update(struct echo_can_state *ec, short iref, short isig);
+int oslec_echo_can_traintap(struct echo_can_state *ec, int pos, short val);
+static inline void echo_can_init(void) {}
+static inline void echo_can_shutdown(void) {}
+short oslec_hpf_tx(struct echo_can_state *ec, short txlin);
+
+#endif
+