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