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: random psychoacoustics (not including preecho)
15 last mod: $Id: psy.h,v 1.4 1999/12/30 07:26:48 xiphmont Exp $
17 ********************************************************************/
22 extern void _vp_psy_init(psy_lookup *p,vorbis_info *vi,int n);
23 extern void _vp_psy_clear(psy_lookup *p);
25 extern void _vp_noise_floor(psy_lookup *p, double *f, double *m);
26 extern void _vp_mask_floor(psy_lookup *p,double *f, double *m);
29 extern double _vp_balance_compute(double *A, double *B, double *lpc,
31 extern void _vp_balance_apply(double *A, double *B, double *lpc, double amp,
32 lpc_lookup *vb,int divp);