/******************************************************************** *                                                                  * * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE.   * * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     * * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE * * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       * *                                                                  * * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2001             * * by the XIPHOPHORUS Company http://www.xiph.org/                  * *                                                                  * ********************************************************************  function: LPC low level routines  last mod: $Id: lpc.h,v 1.18 2001/12/20 01:00:27 segher Exp $ ********************************************************************/#ifndef _V_LPC_H_#define _V_LPC_H_#include "vorbis_codec.h"#include "smallft.h"typedef struct lpclook{  /* en/decode lookups */  drft_lookup fft;  int ln;  int m;} lpc_lookup;extern void lpc_init(lpc_lookup *l,long mapped, int m);extern void lpc_clear(lpc_lookup *l);/* simple linear scale LPC code */extern float vorbis_lpc_from_data(float *data,float *lpc,int n,int m);extern float vorbis_lpc_from_curve(float *curve,float *lpc,lpc_lookup *l);extern void vorbis_lpc_predict(float *coeff,float *prime,int m,			       float *data,long n);#endif