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