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/***
Low Pass Filter
@classmod a.lpf
*/
#ifndef LUA_LIBA_LPF_H
#define LUA_LIBA_LPF_H
#include "a.h"
/***
Low Pass Filter
@field alpha filter coefficient [0,1]
@field output filter output
@table a.lpf
*/
#if defined(__cplusplus)
extern "C" {
#endif /* __cplusplus */
/***
constructor for Low Pass Filter
@tparam number fc cut-off frequency unit(hz)
@tparam number ts sampling time unit(s)
@treturn a.lpf Low Pass Filter userdata
@function new
*/
int liba_lpf_new(lua_State *L);
/***
generate for Low Pass Filter
@tparam number fc cut-off frequency unit(hz)
@tparam number ts sampling time unit(s)
@treturn a.lpf Low Pass Filter userdata
@function gen
*/
int liba_lpf_gen(lua_State *L);
/***
calculate for Low Pass Filter
@tparam number x input value
@treturn number output value
@function iter
*/
int liba_lpf_iter(lua_State *L);
/***
zeroing for Low Pass Filter
@treturn a.lpf Low Pass Filter userdata
@function zero
*/
int liba_lpf_zero(lua_State *L);
#if defined(__cplusplus)
} /* extern "C" */
#endif /* __cplusplus */
#endif /* lpf.h */