#ifndef _ECHO_H__ #define _ECHO_H__ void alg_echo_destroy(void* h); void * alg_echo_create(int fs, int smpl_num); void alg_echo_set_param(void* h, float decay_factor, int ms, int pre_delay_ms); void alg_echo_process(void* h, const float * data_in ,float *data_out); #endif