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 1994-1999 *
9 * by 1999 Monty <monty@xiph.org> and The XIPHOPHORUS Company *
10 * http://www.xiph.org/ *
12 ********************************************************************
14 function: LPC low level routines
16 ********************************************************************/
23 extern double lpc_init(lpc_lookup *l,int n, int m, int oct, int encode_p);
24 extern void lpc_clear(lpc_lookup *l);
26 extern double vorbis_curve_to_lpc(double *curve,double *lpc,lpc_lookup *l);
27 extern void vorbis_lpc_to_curve(double *curve,double *lpc, double amp,
29 extern void vorbis_lpc_apply(double *residue,double *lpc, double amp,