psy.h (4628B)
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 https://xiph.org/ * 10 * * 11 ******************************************************************** 12 13 function: random psychoacoustics (not including preecho) 14 15 ********************************************************************/ 16 17 #ifndef _V_PSY_H_ 18 #define _V_PSY_H_ 19 #include "smallft.h" 20 21 #include "backends.h" 22 #include "envelope.h" 23 24 #ifndef EHMER_MAX 25 #define EHMER_MAX 56 26 #endif 27 28 /* psychoacoustic setup ********************************************/ 29 #define P_BANDS 17 /* 62Hz to 16kHz */ 30 #define P_LEVELS 8 /* 30dB to 100dB */ 31 #define P_LEVEL_0 30. /* 30 dB */ 32 #define P_NOISECURVES 3 33 34 #define NOISE_COMPAND_LEVELS 40 35 typedef struct vorbis_info_psy{ 36 int blockflag; 37 38 float ath_adjatt; 39 float ath_maxatt; 40 41 float tone_masteratt[P_NOISECURVES]; 42 float tone_centerboost; 43 float tone_decay; 44 float tone_abs_limit; 45 float toneatt[P_BANDS]; 46 47 int noisemaskp; 48 float noisemaxsupp; 49 float noisewindowlo; 50 float noisewindowhi; 51 int noisewindowlomin; 52 int noisewindowhimin; 53 int noisewindowfixed; 54 float noiseoff[P_NOISECURVES][P_BANDS]; 55 float noisecompand[NOISE_COMPAND_LEVELS]; 56 57 float max_curve_dB; 58 59 int normal_p; 60 int normal_start; 61 int normal_partition; 62 double normal_thresh; 63 } vorbis_info_psy; 64 65 typedef struct{ 66 int eighth_octave_lines; 67 68 /* for block long/short tuning; encode only */ 69 float preecho_thresh[VE_BANDS]; 70 float postecho_thresh[VE_BANDS]; 71 float stretch_penalty; 72 float preecho_minenergy; 73 74 float ampmax_att_per_sec; 75 76 /* channel coupling config */ 77 int coupling_pkHz[PACKETBLOBS]; 78 int coupling_pointlimit[2][PACKETBLOBS]; 79 int coupling_prepointamp[PACKETBLOBS]; 80 int coupling_postpointamp[PACKETBLOBS]; 81 int sliding_lowpass[2][PACKETBLOBS]; 82 83 } vorbis_info_psy_global; 84 85 typedef struct { 86 float ampmax; 87 int channels; 88 89 vorbis_info_psy_global *gi; 90 int coupling_pointlimit[2][P_NOISECURVES]; 91 } vorbis_look_psy_global; 92 93 94 typedef struct { 95 int n; 96 struct vorbis_info_psy *vi; 97 98 float ***tonecurves; 99 float **noiseoffset; 100 101 float *ath; 102 long *octave; /* in n.ocshift format */ 103 long *bark; 104 105 long firstoc; 106 long shiftoc; 107 int eighth_octave_lines; /* power of two, please */ 108 int total_octave_lines; 109 long rate; /* cache it */ 110 111 float m_val; /* Masking compensation value */ 112 113 } vorbis_look_psy; 114 115 extern void _vp_psy_init(vorbis_look_psy *p,vorbis_info_psy *vi, 116 vorbis_info_psy_global *gi,int n,long rate); 117 extern void _vp_psy_clear(vorbis_look_psy *p); 118 extern void *_vi_psy_dup(void *source); 119 120 extern void _vi_psy_free(vorbis_info_psy *i); 121 extern vorbis_info_psy *_vi_psy_copy(vorbis_info_psy *i); 122 123 extern void _vp_noisemask(vorbis_look_psy *p, 124 float *logmdct, 125 float *logmask); 126 127 extern void _vp_tonemask(vorbis_look_psy *p, 128 float *logfft, 129 float *logmask, 130 float global_specmax, 131 float local_specmax); 132 133 extern void _vp_offset_and_mix(vorbis_look_psy *p, 134 float *noise, 135 float *tone, 136 int offset_select, 137 float *logmask, 138 float *mdct, 139 float *logmdct); 140 141 extern float _vp_ampmax_decay(float amp,vorbis_dsp_state *vd); 142 143 extern void _vp_couple_quantize_normalize(int blobno, 144 vorbis_info_psy_global *g, 145 vorbis_look_psy *p, 146 vorbis_info_mapping0 *vi, 147 float **mdct, 148 int **iwork, 149 int *nonzero, 150 int sliding_lowpass, 151 int ch); 152 153 #endif