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/********************************************************************
* *
* 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: random psychoacoustics (not including preecho)
last mod: $Id: psy.h,v 1.20 2001/05/27 06:44:00 xiphmont Exp $
********************************************************************/
#ifndef _V_PSY_H_
#define _V_PSY_H_
#include "smallft.h"
#ifndef EHMER_MAX
#define EHMER_MAX 56
#endif
/* psychoacoustic setup ********************************************/
#define MAX_BARK 27
#define P_BANDS 17
#define P_LEVELS 11
typedef struct vorbis_info_psy{
int athp;
int decayp;
float ath_adjatt;
float ath_maxatt;
int eighth_octave_lines;
/* 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 */
/* x: 63 88 125 175 250 350 500 700 1k 1.4k 2k 2.8k 4k 5.6k 8k 11.5k 16k Hz */
/* y: 0 10 20 30 40 50 60 70 80 90 100 dB */
int tonemaskp;
float toneatt[P_BANDS][P_LEVELS];
int peakattp;
float peakatt[P_BANDS][P_LEVELS];
int noisemaskp;
float noisemaxsupp;
float noisewindowlo;
float noisewindowhi;
int noisewindowlomin;
int noisewindowhimin;
int noisewindowfixed;
float noisemedian[P_BANDS*2];
float max_curve_dB;
float bound_att_dB;
} vorbis_info_psy;
typedef struct {
int n;
struct vorbis_info_psy *vi;
float ***tonecurves;
float **peakatt;
int *noisemedian;
float *noiseoffset;
float *ath;
long *octave; /* in n.ocshift format */
unsigned long *bark;
long firstoc;
long shiftoc;
int eighth_octave_lines; /* power of two, please */
int total_octave_lines;
} vorbis_look_psy;
extern void _vp_psy_init(vorbis_look_psy *p,vorbis_info_psy *vi,int n,long rate);
extern void _vp_psy_clear(vorbis_look_psy *p);
extern void *_vi_psy_dup(void *source);
extern void _vi_psy_free(vorbis_info_psy *i);
extern vorbis_info_psy *_vi_psy_copy(vorbis_info_psy *i);
extern float _vp_compute_mask(vorbis_look_psy *p,
float *fft,
float *mdct,
float *mask,
float prev_maxamp);
extern float _vp_ampmax_decay(float amp,vorbis_dsp_state *vd);
#endif
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