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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 1.27 2001/12/20 01:00:29 segher Exp $
-
- ********************************************************************/
-
- #ifndef _V_PSY_H_
- #define _V_PSY_H_
- #include "smallft.h"
-
- #include "backends.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 vp_couple{
- int limit; /* sample post */
-
- int outofphase_redundant_flip_p;
- float outofphase_requant_limit;
-
- float amppost_point;
-
- } vp_couple;
-
- typedef struct vp_couple_pass{
- float granulem;
- float igranulem;
-
- vp_couple couple_pass[8];
- } vp_couple_pass;
-
- typedef struct vp_attenblock{
- float block[P_BANDS][P_LEVELS];
- } vp_attenblock;
-
- #define NOISE_COMPAND_LEVELS 40
- typedef struct vorbis_info_psy{
- float ath[27];
-
- float ath_adjatt;
- float ath_maxatt;
-
- float tone_masteratt;
- float tone_guard;
- float tone_abs_limit;
- vp_attenblock toneatt;
-
- int peakattp;
- int curvelimitp;
- vp_attenblock peakatt;
-
- int noisemaskp;
- float noisemaxsupp;
- float noisewindowlo;
- float noisewindowhi;
- int noisewindowlomin;
- int noisewindowhimin;
- int noisewindowfixed;
- float noiseoff[P_BANDS];
- float noisecompand[NOISE_COMPAND_LEVELS];
-
- float max_curve_dB;
-
- vp_couple_pass couple_pass[8];
-
- } vorbis_info_psy;
-
- typedef struct{
- int eighth_octave_lines;
-
- /* for block long/short tuning; encode only */
- float preecho_thresh[4];
- float postecho_thresh[4];
- float preecho_minenergy;
-
- float ampmax_att_per_sec;
-
- /* delay caching... how many samples to keep around prior to our
- current block to aid in analysis? */
- int delaycache;
- } vorbis_info_psy_global;
-
- typedef struct {
- float ampmax;
- int channels;
-
- vorbis_info_psy_global *gi;
- } vorbis_look_psy_global;
-
-
- typedef struct {
- int n;
- struct vorbis_info_psy *vi;
-
- float ***tonecurves;
- float *noisethresh;
- float *noiseoffset;
-
- float *ath;
- long *octave; /* in n.ocshift format */
- long *bark;
-
- long firstoc;
- long shiftoc;
- int eighth_octave_lines; /* power of two, please */
- int total_octave_lines;
- long rate; /* cache it */
- } vorbis_look_psy;
-
- extern void _vp_psy_init(vorbis_look_psy *p,vorbis_info_psy *vi,
- vorbis_info_psy_global *gi,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 void _vp_remove_floor(vorbis_look_psy *p,
- float *mdct,
- float *codedflr,
- float *residue);
-
- extern void _vp_compute_mask(vorbis_look_psy *p,
- float *fft,
- float *mdct,
- float *mask,
- float global_specmax,
- float local_specmax,
- float bitrate_noise_offset);
-
- extern void _vp_quantize_couple(vorbis_look_psy *p,
- vorbis_info_mapping0 *vi,
- float **pcm,
- float **sofar,
- float **quantized,
- int *nonzero,
- int passno);
-
- extern float _vp_ampmax_decay(float amp,vorbis_dsp_state *vd);
-
- #endif
-
-
-