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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,v 1.32 2002/07/13 06:12:47 xiphmont Exp $
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