1 /********************************************************************
3 * THIS FILE IS PART OF THE Ogg Vorbis SOFTWARE CODEC SOURCE CODE. *
4 * USE, DISTRIBUTION AND REPRODUCTION OF THIS SOURCE IS GOVERNED BY *
5 * THE GNU PUBLIC LICENSE 2, WHICH IS INCLUDED WITH THIS SOURCE. *
6 * PLEASE READ THESE TERMS DISTRIBUTING. *
8 * THE OggSQUISH SOURCE CODE IS (C) COPYRIGHT 1994-2000 *
9 * by Monty <monty@xiph.org> and The XIPHOPHORUS Company *
10 * http://www.xiph.org/ *
12 ********************************************************************
14 function: Direct Form I, II IIR filters, plus some specializations
15 last mod: $Id: iir.h,v 1.2 2000/10/12 03:12:52 xiphmont Exp $
17 ********************************************************************/
32 void IIR_init(IIR_state *s,int stages,float gain, float *A, float *B);
33 void IIR_clear(IIR_state *s);
34 float IIR_filter(IIR_state *s,float in);
35 float IIR_filter_ChebBand(IIR_state *s,float in);