/***************************************************************
 *
 *	comb.c
 *	 the comb filter function
 *
 *	12/22/94		bfs initial version
 *
 */

#include "comb.h"

float
comb(struct comb_info* cmb)
{
	cmb->out_data = *cmb->out_ptr;
	*cmb->out_ptr++ = cmb->in_data + cmb->out_data * cmb->coef;

	if (cmb->out_ptr > (cmb->base + cmb->length - 1))
		cmb->out_ptr = cmb->base;
		
	return cmb->out_data;
}