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author John Tsiombikas <nuclear@member.fsf.org>
date Sat, 01 Feb 2014 19:58:19 +0200
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1 /********************************************************************
2 * *
3 * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
4 * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
5 * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
6 * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
7 * *
8 * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2009 *
9 * by the Xiph.Org Foundation http://www.xiph.org/ *
10 * *
11 ********************************************************************
12
13 function: random psychoacoustics (not including preecho)
14 last mod: $Id: psy.h 16946 2010-03-03 16:12:40Z xiphmont $
15
16 ********************************************************************/
17
18 #ifndef _V_PSY_H_
19 #define _V_PSY_H_
20 #include "smallft.h"
21
22 #include "backends.h"
23 #include "envelope.h"
24
25 #ifndef EHMER_MAX
26 #define EHMER_MAX 56
27 #endif
28
29 /* psychoacoustic setup ********************************************/
30 #define P_BANDS 17 /* 62Hz to 16kHz */
31 #define P_LEVELS 8 /* 30dB to 100dB */
32 #define P_LEVEL_0 30. /* 30 dB */
33 #define P_NOISECURVES 3
34
35 #define NOISE_COMPAND_LEVELS 40
36 typedef struct vorbis_info_psy{
37 int blockflag;
38
39 float ath_adjatt;
40 float ath_maxatt;
41
42 float tone_masteratt[P_NOISECURVES];
43 float tone_centerboost;
44 float tone_decay;
45 float tone_abs_limit;
46 float toneatt[P_BANDS];
47
48 int noisemaskp;
49 float noisemaxsupp;
50 float noisewindowlo;
51 float noisewindowhi;
52 int noisewindowlomin;
53 int noisewindowhimin;
54 int noisewindowfixed;
55 float noiseoff[P_NOISECURVES][P_BANDS];
56 float noisecompand[NOISE_COMPAND_LEVELS];
57
58 float max_curve_dB;
59
60 int normal_p;
61 int normal_start;
62 int normal_partition;
63 double normal_thresh;
64 } vorbis_info_psy;
65
66 typedef struct{
67 int eighth_octave_lines;
68
69 /* for block long/short tuning; encode only */
70 float preecho_thresh[VE_BANDS];
71 float postecho_thresh[VE_BANDS];
72 float stretch_penalty;
73 float preecho_minenergy;
74
75 float ampmax_att_per_sec;
76
77 /* channel coupling config */
78 int coupling_pkHz[PACKETBLOBS];
79 int coupling_pointlimit[2][PACKETBLOBS];
80 int coupling_prepointamp[PACKETBLOBS];
81 int coupling_postpointamp[PACKETBLOBS];
82 int sliding_lowpass[2][PACKETBLOBS];
83
84 } vorbis_info_psy_global;
85
86 typedef struct {
87 float ampmax;
88 int channels;
89
90 vorbis_info_psy_global *gi;
91 int coupling_pointlimit[2][P_NOISECURVES];
92 } vorbis_look_psy_global;
93
94
95 typedef struct {
96 int n;
97 struct vorbis_info_psy *vi;
98
99 float ***tonecurves;
100 float **noiseoffset;
101
102 float *ath;
103 long *octave; /* in n.ocshift format */
104 long *bark;
105
106 long firstoc;
107 long shiftoc;
108 int eighth_octave_lines; /* power of two, please */
109 int total_octave_lines;
110 long rate; /* cache it */
111
112 float m_val; /* Masking compensation value */
113
114 } vorbis_look_psy;
115
116 extern void _vp_psy_init(vorbis_look_psy *p,vorbis_info_psy *vi,
117 vorbis_info_psy_global *gi,int n,long rate);
118 extern void _vp_psy_clear(vorbis_look_psy *p);
119 extern void *_vi_psy_dup(void *source);
120
121 extern void _vi_psy_free(vorbis_info_psy *i);
122 extern vorbis_info_psy *_vi_psy_copy(vorbis_info_psy *i);
123
124 extern void _vp_noisemask(vorbis_look_psy *p,
125 float *logmdct,
126 float *logmask);
127
128 extern void _vp_tonemask(vorbis_look_psy *p,
129 float *logfft,
130 float *logmask,
131 float global_specmax,
132 float local_specmax);
133
134 extern void _vp_offset_and_mix(vorbis_look_psy *p,
135 float *noise,
136 float *tone,
137 int offset_select,
138 float *logmask,
139 float *mdct,
140 float *logmdct);
141
142 extern float _vp_ampmax_decay(float amp,vorbis_dsp_state *vd);
143
144 extern void _vp_couple_quantize_normalize(int blobno,
145 vorbis_info_psy_global *g,
146 vorbis_look_psy *p,
147 vorbis_info_mapping0 *vi,
148 float **mdct,
149 int **iwork,
150 int *nonzero,
151 int sliding_lowpass,
152 int ch);
153
154 #endif