40#if !defined(_ECHO_MONITOR_H_) 
   41#define _ECHO_MONITOR_H_ 
   43#if defined(__cplusplus) 
   48int start_echo_can_monitor(
int len);
 
   49int echo_can_monitor_can_update(
const int16_t *coeffs, 
int len);
 
   50int echo_can_monitor_line_model_update(
const int32_t *coeffs, 
int len);
 
   51int echo_can_monitor_line_spectrum_update(
const int16_t amp[], 
int len);
 
   52void echo_can_monitor_wait_to_end(
void);
 
   53void echo_can_monitor_update_display(
void);
 
   55#if defined(__cplusplus)