[16] | 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 1994-2007 * |
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| 9 | * by the Xiph.Org Foundation http://www.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 | last mod: $Id: psy.h 13293 2007-07-24 00:09:47Z xiphmont $ |
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| 15 | |
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| 16 | ********************************************************************/ |
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| 17 | |
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| 18 | #ifndef _V_PSY_H_ |
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| 19 | #define _V_PSY_H_ |
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| 20 | #include "smallft.h" |
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| 21 | |
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| 22 | #include "backends.h" |
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| 23 | #include "envelope.h" |
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| 24 | |
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| 25 | #ifndef EHMER_MAX |
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| 26 | #define EHMER_MAX 56 |
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| 27 | #endif |
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| 28 | |
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| 29 | /* psychoacoustic setup ********************************************/ |
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| 30 | #define P_BANDS 17 /* 62Hz to 16kHz */ |
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| 31 | #define P_LEVELS 8 /* 30dB to 100dB */ |
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| 32 | #define P_LEVEL_0 30. /* 30 dB */ |
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| 33 | #define P_NOISECURVES 3 |
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| 34 | |
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| 35 | #define NOISE_COMPAND_LEVELS 40 |
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| 36 | typedef struct vorbis_info_psy{ |
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| 37 | int blockflag; |
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| 38 | |
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| 39 | float ath_adjatt; |
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| 40 | float ath_maxatt; |
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| 41 | |
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| 42 | float tone_masteratt[P_NOISECURVES]; |
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| 43 | float tone_centerboost; |
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| 44 | float tone_decay; |
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| 45 | float tone_abs_limit; |
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| 46 | float toneatt[P_BANDS]; |
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| 47 | |
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| 48 | int noisemaskp; |
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| 49 | float noisemaxsupp; |
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| 50 | float noisewindowlo; |
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| 51 | float noisewindowhi; |
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| 52 | int noisewindowlomin; |
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| 53 | int noisewindowhimin; |
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| 54 | int noisewindowfixed; |
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| 55 | float noiseoff[P_NOISECURVES][P_BANDS]; |
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| 56 | float noisecompand[NOISE_COMPAND_LEVELS]; |
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| 57 | |
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| 58 | float max_curve_dB; |
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| 59 | |
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| 60 | int normal_channel_p; |
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| 61 | int normal_point_p; |
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| 62 | int normal_start; |
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| 63 | int normal_partition; |
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| 64 | double normal_thresh; |
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| 65 | } vorbis_info_psy; |
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| 66 | |
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| 67 | typedef struct{ |
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| 68 | int eighth_octave_lines; |
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| 69 | |
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| 70 | /* for block long/short tuning; encode only */ |
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| 71 | float preecho_thresh[VE_BANDS]; |
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| 72 | float postecho_thresh[VE_BANDS]; |
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| 73 | float stretch_penalty; |
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| 74 | float preecho_minenergy; |
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| 75 | |
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| 76 | float ampmax_att_per_sec; |
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| 77 | |
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| 78 | /* channel coupling config */ |
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| 79 | int coupling_pkHz[PACKETBLOBS]; |
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| 80 | int coupling_pointlimit[2][PACKETBLOBS]; |
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| 81 | int coupling_prepointamp[PACKETBLOBS]; |
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| 82 | int coupling_postpointamp[PACKETBLOBS]; |
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| 83 | int sliding_lowpass[2][PACKETBLOBS]; |
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| 84 | |
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| 85 | } vorbis_info_psy_global; |
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| 86 | |
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| 87 | typedef struct { |
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| 88 | float ampmax; |
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| 89 | int channels; |
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| 90 | |
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| 91 | vorbis_info_psy_global *gi; |
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| 92 | int coupling_pointlimit[2][P_NOISECURVES]; |
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| 93 | } vorbis_look_psy_global; |
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| 94 | |
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| 95 | |
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| 96 | typedef struct { |
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| 97 | int n; |
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| 98 | struct vorbis_info_psy *vi; |
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| 99 | |
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| 100 | float ***tonecurves; |
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| 101 | float **noiseoffset; |
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| 102 | |
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| 103 | float *ath; |
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| 104 | long *octave; /* in n.ocshift format */ |
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| 105 | long *bark; |
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| 106 | |
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| 107 | long firstoc; |
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| 108 | long shiftoc; |
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| 109 | int eighth_octave_lines; /* power of two, please */ |
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| 110 | int total_octave_lines; |
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| 111 | long rate; /* cache it */ |
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| 112 | |
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| 113 | float m_val; /* Masking compensation value */ |
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| 114 | |
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| 115 | } vorbis_look_psy; |
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| 116 | |
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| 117 | extern void _vp_psy_init(vorbis_look_psy *p,vorbis_info_psy *vi, |
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| 118 | vorbis_info_psy_global *gi,int n,long rate); |
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| 119 | extern void _vp_psy_clear(vorbis_look_psy *p); |
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| 120 | extern void *_vi_psy_dup(void *source); |
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| 121 | |
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| 122 | extern void _vi_psy_free(vorbis_info_psy *i); |
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| 123 | extern vorbis_info_psy *_vi_psy_copy(vorbis_info_psy *i); |
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| 124 | |
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| 125 | extern void _vp_remove_floor(vorbis_look_psy *p, |
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| 126 | float *mdct, |
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| 127 | int *icodedflr, |
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| 128 | float *residue, |
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| 129 | int sliding_lowpass); |
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| 130 | |
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| 131 | extern void _vp_noisemask(vorbis_look_psy *p, |
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| 132 | float *logmdct, |
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| 133 | float *logmask); |
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| 134 | |
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| 135 | extern void _vp_tonemask(vorbis_look_psy *p, |
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| 136 | float *logfft, |
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| 137 | float *logmask, |
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| 138 | float global_specmax, |
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| 139 | float local_specmax); |
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| 140 | |
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| 141 | extern void _vp_offset_and_mix(vorbis_look_psy *p, |
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| 142 | float *noise, |
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| 143 | float *tone, |
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| 144 | int offset_select, |
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| 145 | float *logmask, |
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| 146 | float *mdct, |
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| 147 | float *logmdct); |
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| 148 | |
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| 149 | extern float _vp_ampmax_decay(float amp,vorbis_dsp_state *vd); |
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| 150 | |
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| 151 | extern float **_vp_quantize_couple_memo(vorbis_block *vb, |
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| 152 | vorbis_info_psy_global *g, |
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| 153 | vorbis_look_psy *p, |
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| 154 | vorbis_info_mapping0 *vi, |
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| 155 | float **mdct); |
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| 156 | |
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| 157 | extern void _vp_couple(int blobno, |
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| 158 | vorbis_info_psy_global *g, |
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| 159 | vorbis_look_psy *p, |
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| 160 | vorbis_info_mapping0 *vi, |
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| 161 | float **res, |
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| 162 | float **mag_memo, |
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| 163 | int **mag_sort, |
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| 164 | int **ifloor, |
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| 165 | int *nonzero, |
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| 166 | int sliding_lowpass); |
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| 167 | |
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| 168 | extern void _vp_noise_normalize(vorbis_look_psy *p, |
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| 169 | float *in,float *out,int *sortedindex); |
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| 170 | |
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| 171 | extern void _vp_noise_normalize_sort(vorbis_look_psy *p, |
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| 172 | float *magnitudes,int *sortedindex); |
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| 173 | |
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| 174 | extern int **_vp_quantize_couple_sort(vorbis_block *vb, |
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| 175 | vorbis_look_psy *p, |
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| 176 | vorbis_info_mapping0 *vi, |
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| 177 | float **mags); |
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| 178 | |
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| 179 | extern void hf_reduction(vorbis_info_psy_global *g, |
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| 180 | vorbis_look_psy *p, |
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| 181 | vorbis_info_mapping0 *vi, |
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| 182 | float **mdct); |
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| 183 | |
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| 184 | |
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| 185 | #endif |
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| 186 | |
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