summaryrefslogtreecommitdiffhomepage
path: root/contrib/vorbis/lib/psy.h
blob: ab2534db3a8da256a57391ccfbc93b66c97a8c54 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
/********************************************************************
 *                                                                  *
 * 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 1994-2009             *
 * by the Xiph.Org Foundation http://www.xiph.org/                  *
 *                                                                  *
 ********************************************************************

 function: random psychoacoustics (not including preecho)

 ********************************************************************/

#ifndef _V_PSY_H_
#define _V_PSY_H_
#include "smallft.h"

#include "backends.h"
#include "envelope.h"

#ifndef EHMER_MAX
#define EHMER_MAX 56
#endif

/* psychoacoustic setup ********************************************/
#define P_BANDS 17      /* 62Hz to 16kHz */
#define P_LEVELS 8      /* 30dB to 100dB */
#define P_LEVEL_0 30.    /* 30 dB */
#define P_NOISECURVES 3

#define NOISE_COMPAND_LEVELS 40
typedef struct vorbis_info_psy{
  int   blockflag;

  float ath_adjatt;
  float ath_maxatt;

  float tone_masteratt[P_NOISECURVES];
  float tone_centerboost;
  float tone_decay;
  float tone_abs_limit;
  float toneatt[P_BANDS];

  int noisemaskp;
  float noisemaxsupp;
  float noisewindowlo;
  float noisewindowhi;
  int   noisewindowlomin;
  int   noisewindowhimin;
  int   noisewindowfixed;
  float noiseoff[P_NOISECURVES][P_BANDS];
  float noisecompand[NOISE_COMPAND_LEVELS];

  float max_curve_dB;

  int normal_p;
  int normal_start;
  int normal_partition;
  double normal_thresh;
} vorbis_info_psy;

typedef struct{
  int   eighth_octave_lines;

  /* for block long/short tuning; encode only */
  float preecho_thresh[VE_BANDS];
  float postecho_thresh[VE_BANDS];
  float stretch_penalty;
  float preecho_minenergy;

  float ampmax_att_per_sec;

  /* channel coupling config */
  int   coupling_pkHz[PACKETBLOBS];
  int   coupling_pointlimit[2][PACKETBLOBS];
  int   coupling_prepointamp[PACKETBLOBS];
  int   coupling_postpointamp[PACKETBLOBS];
  int   sliding_lowpass[2][PACKETBLOBS];

} vorbis_info_psy_global;

typedef struct {
  float ampmax;
  int   channels;

  vorbis_info_psy_global *gi;
  int   coupling_pointlimit[2][P_NOISECURVES];
} vorbis_look_psy_global;


typedef struct {
  int n;
  struct vorbis_info_psy *vi;

  float ***tonecurves;
  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 */

  float m_val; /* Masking compensation value */

} 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_noisemask(vorbis_look_psy *p,
                          float *logmdct,
                          float *logmask);

extern void _vp_tonemask(vorbis_look_psy *p,
                         float *logfft,
                         float *logmask,
                         float global_specmax,
                         float local_specmax);

extern void _vp_offset_and_mix(vorbis_look_psy *p,
                               float *noise,
                               float *tone,
                               int offset_select,
                               float *logmask,
                               float *mdct,
                               float *logmdct);

extern float _vp_ampmax_decay(float amp,vorbis_dsp_state *vd);

extern void _vp_couple_quantize_normalize(int blobno,
                                          vorbis_info_psy_global *g,
                                          vorbis_look_psy *p,
                                          vorbis_info_mapping0 *vi,
                                          float **mdct,
                                          int   **iwork,
                                          int    *nonzero,
                                          int     sliding_lowpass,
                                          int     ch);

#endif