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psy.h (4771B)
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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 1994-2002 *
9 * by the XIPHOPHORUS Company http://www.xiph.org/ *
10 * *
11 ********************************************************************
12
13 function: random psychoacoustics (not including preecho)
14 last mod: $Id: psy.h 1919 2005-07-24 14:18:04Z baford $
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_channel_p;
61 int normal_point_p;
62 int normal_start;
63 int normal_partition;
64 double normal_thresh;
65 } vorbis_info_psy;
66
67 typedef struct{
68 int eighth_octave_lines;
69
70 /* for block long/short tuning; encode only */
71 float preecho_thresh[VE_BANDS];
72 float postecho_thresh[VE_BANDS];
73 float stretch_penalty;
74 float preecho_minenergy;
75
76 float ampmax_att_per_sec;
77
78 /* channel coupling config */
79 int coupling_pkHz[PACKETBLOBS];
80 int coupling_pointlimit[2][PACKETBLOBS];
81 int coupling_prepointamp[PACKETBLOBS];
82 int coupling_postpointamp[PACKETBLOBS];
83 int sliding_lowpass[2][PACKETBLOBS];
84
85 } vorbis_info_psy_global;
86
87 typedef struct {
88 float ampmax;
89 int channels;
90
91 vorbis_info_psy_global *gi;
92 int coupling_pointlimit[2][P_NOISECURVES];
93 } vorbis_look_psy_global;
94
95
96 typedef struct {
97 int n;
98 struct vorbis_info_psy *vi;
99
100 float ***tonecurves;
101 float **noiseoffset;
102
103 float *ath;
104 long *octave; /* in n.ocshift format */
105 long *bark;
106
107 long firstoc;
108 long shiftoc;
109 int eighth_octave_lines; /* power of two, please */
110 int total_octave_lines;
111 long rate; /* cache it */
112 } vorbis_look_psy;
113
114 extern void _vp_psy_init(vorbis_look_psy *p,vorbis_info_psy *vi,
115 vorbis_info_psy_global *gi,int n,long rate);
116 extern void _vp_psy_clear(vorbis_look_psy *p);
117 extern void *_vi_psy_dup(void *source);
118
119 extern void _vi_psy_free(vorbis_info_psy *i);
120 extern vorbis_info_psy *_vi_psy_copy(vorbis_info_psy *i);
121
122 extern void _vp_remove_floor(vorbis_look_psy *p,
123 float *mdct,
124 int *icodedflr,
125 float *residue,
126 int sliding_lowpass);
127
128 extern void _vp_noisemask(vorbis_look_psy *p,
129 float *logmdct,
130 float *logmask);
131
132 extern void _vp_tonemask(vorbis_look_psy *p,
133 float *logfft,
134 float *logmask,
135 float global_specmax,
136 float local_specmax);
137
138 extern void _vp_offset_and_mix(vorbis_look_psy *p,
139 float *noise,
140 float *tone,
141 int offset_select,
142 float *logmask);
143
144 extern float _vp_ampmax_decay(float amp,vorbis_dsp_state *vd);
145
146 extern float **_vp_quantize_couple_memo(vorbis_block *vb,
147 vorbis_info_psy_global *g,
148 vorbis_look_psy *p,
149 vorbis_info_mapping0 *vi,
150 float **mdct);
151
152 extern void _vp_couple(int blobno,
153 vorbis_info_psy_global *g,
154 vorbis_look_psy *p,
155 vorbis_info_mapping0 *vi,
156 float **res,
157 float **mag_memo,
158 int **mag_sort,
159 int **ifloor,
160 int *nonzero,
161 int sliding_lowpass);
162
163 extern void _vp_noise_normalize(vorbis_look_psy *p,
164 float *in,float *out,int *sortedindex);
165
166 extern void _vp_noise_normalize_sort(vorbis_look_psy *p,
167 float *magnitudes,int *sortedindex);
168
169 extern int **_vp_quantize_couple_sort(vorbis_block *vb,
170 vorbis_look_psy *p,
171 vorbis_info_mapping0 *vi,
172 float **mags);
173
174 #endif
175