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 155